LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
* [PATCH 00/21] regulator: switch core to GPIO descriptors
@ 2018-02-12 13:16 Linus Walleij
  2018-02-12 13:16 ` [PATCH 01/21] regulator: core: Support passing an initialized GPIO enable descriptor Linus Walleij
                   ` (20 more replies)
  0 siblings, 21 replies; 54+ messages in thread
From: Linus Walleij @ 2018-02-12 13:16 UTC (permalink / raw)
  To: Liam Girdwood, Mark Brown; +Cc: linux-kernel, linux-gpio, Linus Walleij

While the regulator core mostly use GPIO descriptors
there are some rough edges we need to chisel down:

- The fixed regulator still passes a "ena_gpio" number
  from the global GPIO numberspace. This we want to get
  rid of. We do this by allowing drivers to pass in a
  descriptor instead, converting all drivers and platform
  data over and then only allowing that.

- The fixed regulator also has special platform data or
  device tree properties for handling polarity inversion
  or open drain. We have pulled these special semantics
  into gpiolib in
  commit a603a2b8d86ee93ee2107da8ca75fd854fd4ff32
  "gpio: of: Add special quirk to parse regulator flags"
  so we can now move all drivers over to using only
  descriptors for this as well.

- The GPIO regulator has a similar complicated relationship
  to the global GPIO numberspace. We have merged helpers
  and convert these users too.

Some drivers needed to get a GPIO from an opaque DT node
i.e. a DT node without a corresponding device. For this
case we have added devm_gpiod_get_from_of_node() in the
v4.16-rc1 kernel so we can proceed with the conversion.

I have tried to loop in maintainers of the board files
affected as much as I can. It is uncertain if they even
care in some cases, with some PalmPilot-PDA-type ARM
devices I'm really starting to wonder if they are really
maintained and tested anymore, but I've still done my
best to not accidentally break them.

The patches can also be grabbed from this branch:
https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio.git/log/?h=gpio-descriptors-regulator

I.e.
git pull git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio.git gpio-descriptors-regulator

to test it with any pet system.

Some ACKs and Tested-by's would be nice! I really don't
want to break anything if I can avoid it.

All patches have been boiled through the zeroday build
system so at least everything builds, but runtime testing
is paramount.

Linus Walleij (21):
  regulator: core: Support passing an initialized GPIO enable descriptor
  regulator: fixed: Convert to use GPIO descriptor only
  regulator: gpio: Get enable GPIO using GPIO descriptor
  regulator: da9055: Pass descriptor instead of GPIO number
  regulator: arizona-ldo1: Look up a descriptor and pass to the core
  regulator: da9211: Pass descriptors instead of GPIO numbers
  regulator: max8973: Pass descriptor instead of GPIO number
  regulator: max77686: Pass descriptor instead of GPIO number
  regulator: lm363x: Pass descriptor instead of GPIO number
  regulator: lp8788-ldo: Pass descriptor instead of GPIO number
  regulator: max8952: Pass descriptor instead of GPIO number
  regulator: pfuze100: Delete reference to ena_gpio
  regulator: s2mps11: Pass descriptor instead of GPIO number
  regulator: s5m8767: Pass descriptor instead of GPIO number
  regulator: tps65090: Pass descriptor instead of GPIO number
  regulator: wm8994: Pass descriptor instead of GPIO number
  regulator: core: Only support passing enable GPIO descriptors
  regulator: fixed/gpio: Pull inversion/OD into gpiolib
  regulator: fixed/gpio: Update device tree bindings
  regulator: gpio: Convert to fully use descriptors
  regulator: gpio: Simplify probe path

 .../bindings/regulator/fixed-regulator.txt         |  13 +-
 .../bindings/regulator/gpio-regulator.txt          |   4 +
 arch/arm/mach-imx/mach-mx21ads.c                   |  14 +-
 arch/arm/mach-imx/mach-mx27ads.c                   |  12 +-
 arch/arm/mach-mmp/brownstone.c                     |  13 +-
 arch/arm/mach-omap1/board-ams-delta.c              |  15 +-
 arch/arm/mach-omap2/pdata-quirks.c                 |  17 +-
 arch/arm/mach-pxa/em-x270.c                        |   2 -
 arch/arm/mach-pxa/ezx.c                            |  34 ++--
 arch/arm/mach-pxa/hx4700.c                         |  23 ++-
 arch/arm/mach-pxa/magician.c                       |  25 ++-
 arch/arm/mach-pxa/raumfeld.c                       |  13 +-
 arch/arm/mach-pxa/zeus.c                           |  24 ++-
 arch/arm/mach-s3c64xx/mach-crag6410-module.c       |  18 +-
 arch/arm/mach-s3c64xx/mach-crag6410.c              |   1 -
 arch/arm/mach-s3c64xx/mach-smdk6410.c              |   1 -
 arch/blackfin/mach-bf537/boards/stamp.c            |  15 +-
 arch/sh/boards/mach-ecovec24/setup.c               |  29 +++-
 .../intel-mid/device_libs/platform_bcm43xx.c       |  20 ++-
 drivers/mfd/wm8994-core.c                          |   9 -
 drivers/regulator/arizona-ldo1.c                   |  19 +-
 drivers/regulator/core.c                           |  33 +---
 drivers/regulator/da9055-regulator.c               |   5 +-
 drivers/regulator/da9211-regulator.c               |  23 ++-
 drivers/regulator/fixed-helper.c                   |   1 -
 drivers/regulator/fixed.c                          |  43 ++---
 drivers/regulator/gpio-regulator.c                 | 193 ++++++++-------------
 drivers/regulator/lm363x-regulator.c               |  20 +--
 drivers/regulator/lp8788-ldo.c                     |  32 ++--
 drivers/regulator/max77686-regulator.c             |  19 +-
 drivers/regulator/max8952.c                        |  18 +-
 drivers/regulator/max8973-regulator.c              |  54 +++---
 drivers/regulator/pfuze100-regulator.c             |   1 -
 drivers/regulator/s2mps11.c                        |  46 ++---
 drivers/regulator/s5m8767.c                        |  26 +--
 drivers/regulator/tps65090-regulator.c             |  50 +++---
 drivers/regulator/wm8994-regulator.c               |  19 +-
 include/linux/mfd/da9055/pdata.h                   |   5 +-
 include/linux/mfd/lp8788.h                         |  16 --
 include/linux/mfd/samsung/core.h                   |   4 +-
 include/linux/mfd/tps65090.h                       |   8 +-
 include/linux/mfd/wm8994/pdata.h                   |   3 -
 include/linux/regulator/arizona-ldo1.h             |   3 -
 include/linux/regulator/da9211.h                   |   4 +-
 include/linux/regulator/driver.h                   |  11 +-
 include/linux/regulator/fixed.h                    |  13 --
 include/linux/regulator/gpio-regulator.h           |  18 +-
 include/linux/regulator/max8952.h                  |   1 -
 48 files changed, 519 insertions(+), 471 deletions(-)

-- 
2.14.3

^ permalink raw reply	[flat|nested] 54+ messages in thread

* [PATCH 01/21] regulator: core: Support passing an initialized GPIO enable descriptor
  2018-02-12 13:16 [PATCH 00/21] regulator: switch core to GPIO descriptors Linus Walleij
@ 2018-02-12 13:16 ` Linus Walleij
  2018-02-16 17:12   ` Applied "regulator: core: Support passing an initialized GPIO enable descriptor" to the regulator tree Mark Brown
  2018-02-12 13:16 ` [PATCH 02/21] regulator: fixed: Convert to use GPIO descriptor only Linus Walleij
                   ` (19 subsequent siblings)
  20 siblings, 1 reply; 54+ messages in thread
From: Linus Walleij @ 2018-02-12 13:16 UTC (permalink / raw)
  To: Liam Girdwood, Mark Brown; +Cc: linux-kernel, linux-gpio, Linus Walleij

We are currently passing a GPIO number from the global GPIO numberspace
into the regulator core for handling enable GPIOs. This is not good
since it ties into the global GPIO numberspace and uses gpio_to_desc()
to overcome this.

Start supporting passing an already initialized GPIO descriptor to the
core instead: leaf drivers pick their descriptors, associated directly
with the device node (or from ACPI or from a board descriptor table)
and use that directly without any roundtrip over the global GPIO
numberspace.

This looks messy since it adds a bunch of extra code in the core, but
at the end of the patch series we will delete the handling of the GPIO
number and only deal with descriptors so things end up neat.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
 drivers/regulator/core.c         | 25 ++++++++++++++++---------
 include/linux/regulator/driver.h |  3 +++
 2 files changed, 19 insertions(+), 9 deletions(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index dd4708c58480..4549b93b0ff9 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -1937,7 +1937,10 @@ static int regulator_ena_gpio_request(struct regulator_dev *rdev,
 	struct gpio_desc *gpiod;
 	int ret;
 
-	gpiod = gpio_to_desc(config->ena_gpio);
+	if (config->ena_gpiod)
+		gpiod = config->ena_gpiod;
+	else
+		gpiod = gpio_to_desc(config->ena_gpio);
 
 	list_for_each_entry(pin, &regulator_ena_gpio_list, list) {
 		if (pin->gpiod == gpiod) {
@@ -1947,15 +1950,18 @@ static int regulator_ena_gpio_request(struct regulator_dev *rdev,
 		}
 	}
 
-	ret = gpio_request_one(config->ena_gpio,
-				GPIOF_DIR_OUT | config->ena_gpio_flags,
-				rdev_get_name(rdev));
-	if (ret)
-		return ret;
+	if (!config->ena_gpiod) {
+		ret = gpio_request_one(config->ena_gpio,
+				       GPIOF_DIR_OUT | config->ena_gpio_flags,
+				       rdev_get_name(rdev));
+		if (ret)
+			return ret;
+	}
 
 	pin = kzalloc(sizeof(struct regulator_enable_gpio), GFP_KERNEL);
 	if (pin == NULL) {
-		gpio_free(config->ena_gpio);
+		if (!config->ena_gpiod)
+			gpio_free(config->ena_gpio);
 		return -ENOMEM;
 	}
 
@@ -4154,8 +4160,9 @@ regulator_register(const struct regulator_desc *regulator_desc,
 			goto clean;
 	}
 
-	if ((config->ena_gpio || config->ena_gpio_initialized) &&
-	    gpio_is_valid(config->ena_gpio)) {
+	if (config->ena_gpiod ||
+	    ((config->ena_gpio || config->ena_gpio_initialized) &&
+	     gpio_is_valid(config->ena_gpio))) {
 		mutex_lock(&regulator_list_mutex);
 		ret = regulator_ena_gpio_request(rdev, config);
 		mutex_unlock(&regulator_list_mutex);
diff --git a/include/linux/regulator/driver.h b/include/linux/regulator/driver.h
index 4c00486b7a78..4fc96cb8e5d7 100644
--- a/include/linux/regulator/driver.h
+++ b/include/linux/regulator/driver.h
@@ -19,6 +19,7 @@
 #include <linux/notifier.h>
 #include <linux/regulator/consumer.h>
 
+struct gpio_desc;
 struct regmap;
 struct regulator_dev;
 struct regulator_config;
@@ -387,6 +388,7 @@ struct regulator_desc {
  *                        initialized, meaning that >= 0 is a valid gpio
  *                        identifier and < 0 is a non existent gpio.
  * @ena_gpio: GPIO controlling regulator enable.
+ * @ena_gpiod: GPIO descriptor controlling regulator enable.
  * @ena_gpio_invert: Sense for GPIO enable control.
  * @ena_gpio_flags: Flags to use when calling gpio_request_one()
  */
@@ -399,6 +401,7 @@ struct regulator_config {
 
 	bool ena_gpio_initialized;
 	int ena_gpio;
+	struct gpio_desc *ena_gpiod;
 	unsigned int ena_gpio_invert:1;
 	unsigned int ena_gpio_flags;
 };
-- 
2.14.3

^ permalink raw reply	[flat|nested] 54+ messages in thread

* [PATCH 02/21] regulator: fixed: Convert to use GPIO descriptor only
  2018-02-12 13:16 [PATCH 00/21] regulator: switch core to GPIO descriptors Linus Walleij
  2018-02-12 13:16 ` [PATCH 01/21] regulator: core: Support passing an initialized GPIO enable descriptor Linus Walleij
@ 2018-02-12 13:16 ` Linus Walleij
  2018-02-12 15:13   ` Andy Shevchenko
  2018-02-12 13:16 ` [PATCH 03/21] regulator: gpio: Get enable GPIO using GPIO descriptor Linus Walleij
                   ` (18 subsequent siblings)
  20 siblings, 1 reply; 54+ messages in thread
From: Linus Walleij @ 2018-02-12 13:16 UTC (permalink / raw)
  To: Liam Girdwood, Mark Brown
  Cc: linux-kernel, linux-gpio, Linus Walleij, Andy Shevchenko,
	Alexander Shiyan, Haojian Zhuang, Aaro Koskinen, Tony Lindgren,
	Mike Rapoport, Robert Jarzmik, Philipp Zabel, Daniel Mack,
	Marc Zyngier, Geert Uytterhoeven

As we augmented the regulator core to accept a GPIO descriptor instead
of a GPIO number, we can augment the fixed GPIO regulator to look up
and pass that descriptor directly from device tree or board GPIO
descriptor look up tables.

Some boards just auto-enumerate their fixed regulator platform devices
and I have assumed they get names like "fixed-regulator.0" but it's
pretty hard to guess this. I need some testing from board maintainers to
be sure. Other boards are straight forward, using just plain
"fixed-regulator" (ID -1) or "fixed-regulator.1" hammering down the
device ID.

The OMAP didn't have proper label names on its GPIO chips so I have fixed
this with a separate patch to the GPIO tree.

It seems the da9055 and da9211 has never got around to actually passing
any enable gpio into its platform data (not the in-tree code anyway) so we
can just decide to simply pass a descriptor instead.

The fixed GPIO-controlled regulator in mach-pxa/ezx.c was confusingly named
"*_dummy_supply_device" while it is a very real device backed by a GPIO
line. There is nothing dummy about it at all, so I renamed it with the
infix *_regulator_* as part of this patch set.

For the patch hunk hitting arch/blackfin I would say I do not expect
testing, review or ACKs anymore so if it works, it works.

The hunk hitting the x86 BCM43xx driver is especially tricky as the number
comes out of SFI which is a mystery to me. I definately need someone to
look at this. (Hi Andy.)

Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com> # Check the x86 BCM stuff
Cc: Alexander Shiyan <shc_work@mail.ru> # i.MX boards user
Cc: Haojian Zhuang <haojian.zhuang@gmail.com> # MMP2 maintainer
Cc: Aaro Koskinen <aaro.koskinen@iki.fi> # OMAP1 maintainer
Cc: Tony Lindgren <tony@atomide.com> # OMAP1,2,3 maintainer
Cc: Mike Rapoport <mike@compulab.co.il> # EM-X270 maintainer
Cc: Robert Jarzmik <robert.jarzmik@free.fr> # EZX maintainer
Cc: Philipp Zabel <philipp.zabel@gmail.com> # Magician maintainer
Cc: Daniel Mack <zonque@gmail.com> # Raumfeld maintainer
Cc: Marc Zyngier <marc.zyngier@arm.com> # Zeus maintainer
Cc: Geert Uytterhoeven <geert+renesas@glider.be> # SuperH pinctrl/GPIO maintainer
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
 arch/arm/mach-imx/mach-mx21ads.c                   | 13 ++++++++-
 arch/arm/mach-imx/mach-mx27ads.c                   | 12 +++++++-
 arch/arm/mach-mmp/brownstone.c                     | 12 +++++++-
 arch/arm/mach-omap1/board-ams-delta.c              | 14 ++++++++-
 arch/arm/mach-omap2/pdata-quirks.c                 | 16 ++++++++++-
 arch/arm/mach-pxa/em-x270.c                        |  1 -
 arch/arm/mach-pxa/ezx.c                            | 33 ++++++++++++++--------
 arch/arm/mach-pxa/magician.c                       |  2 +-
 arch/arm/mach-pxa/raumfeld.c                       | 12 ++++++--
 arch/arm/mach-pxa/zeus.c                           | 23 +++++++++++++--
 arch/arm/mach-s3c64xx/mach-crag6410.c              |  1 -
 arch/arm/mach-s3c64xx/mach-smdk6410.c              |  1 -
 arch/blackfin/mach-bf537/boards/stamp.c            | 14 ++++++++-
 arch/sh/boards/mach-ecovec24/setup.c               | 27 ++++++++++++++++--
 .../intel-mid/device_libs/platform_bcm43xx.c       | 19 +++++++++++--
 drivers/regulator/fixed-helper.c                   |  1 -
 drivers/regulator/fixed.c                          | 33 +++++++++++-----------
 include/linux/regulator/fixed.h                    |  3 --
 18 files changed, 186 insertions(+), 51 deletions(-)

diff --git a/arch/arm/mach-imx/mach-mx21ads.c b/arch/arm/mach-imx/mach-mx21ads.c
index 5e366824814f..5d3b6b4fe6db 100644
--- a/arch/arm/mach-imx/mach-mx21ads.c
+++ b/arch/arm/mach-imx/mach-mx21ads.c
@@ -18,6 +18,7 @@
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/physmap.h>
 #include <linux/gpio/driver.h>
+#include <linux/gpio/machine.h>
 #include <linux/gpio.h>
 #include <linux/regulator/fixed.h>
 #include <linux/regulator/machine.h>
@@ -175,6 +176,7 @@ static struct resource mx21ads_mmgpio_resource =
 	DEFINE_RES_MEM_NAMED(MX21ADS_IO_REG, SZ_2, "dat");
 
 static struct bgpio_pdata mx21ads_mmgpio_pdata = {
+	.label	= "mx21ads-mmgpio",
 	.base	= MX21ADS_MMGPIO_BASE,
 	.ngpio	= 16,
 };
@@ -203,7 +205,6 @@ static struct regulator_init_data mx21ads_lcd_regulator_init_data = {
 static struct fixed_voltage_config mx21ads_lcd_regulator_pdata = {
 	.supply_name	= "LCD",
 	.microvolts	= 3300000,
-	.gpio		= MX21ADS_IO_LCDON,
 	.enable_high	= 1,
 	.init_data	= &mx21ads_lcd_regulator_init_data,
 };
@@ -216,6 +217,15 @@ static struct platform_device mx21ads_lcd_regulator = {
 	},
 };
 
+static struct gpiod_lookup_table mx21ads_lcd_regulator_gpiod_table = {
+	.dev_id = "reg-fixed-voltage.0", /* Let's hope ID 0 is what we get */
+	.table = {
+		GPIO_LOOKUP("mx21ads-mmgpio", 9,
+			    "enable", GPIO_ACTIVE_HIGH),
+		{ },
+	},
+};
+
 /*
  * Connected is a portrait Sharp-QVGA display
  * of type: LQ035Q7DB02
@@ -311,6 +321,7 @@ static void __init mx21ads_late_init(void)
 {
 	imx21_add_mxc_mmc(0, &mx21ads_sdhc_pdata);
 
+	gpiod_add_lookup_table(&mx21ads_lcd_regulator_gpiod_table);
 	platform_add_devices(platform_devices, ARRAY_SIZE(platform_devices));
 
 	mx21ads_cs8900_resources[1].start =
diff --git a/arch/arm/mach-imx/mach-mx27ads.c b/arch/arm/mach-imx/mach-mx27ads.c
index a04bb094ded1..0fdb88db0cbd 100644
--- a/arch/arm/mach-imx/mach-mx27ads.c
+++ b/arch/arm/mach-imx/mach-mx27ads.c
@@ -16,6 +16,7 @@
 #include <linux/gpio/driver.h>
 /* Needed for gpio_to_irq() */
 #include <linux/gpio.h>
+#include <linux/gpio/machine.h>
 #include <linux/platform_device.h>
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/map.h>
@@ -230,10 +231,17 @@ static struct regulator_init_data mx27ads_lcd_regulator_init_data = {
 static struct fixed_voltage_config mx27ads_lcd_regulator_pdata = {
 	.supply_name	= "LCD",
 	.microvolts	= 3300000,
-	.gpio		= MX27ADS_LCD_GPIO,
 	.init_data	= &mx27ads_lcd_regulator_init_data,
 };
 
+static struct gpiod_lookup_table mx27ads_lcd_regulator_gpiod_table = {
+	.dev_id = "reg-fixed-voltage.0", /* Let's hope ID 0 is what we get */
+	.table = {
+		GPIO_LOOKUP("LCD", 0, "enable", GPIO_ACTIVE_HIGH),
+		{ },
+	},
+};
+
 static void __init mx27ads_regulator_init(void)
 {
 	struct gpio_chip *vchip;
@@ -247,6 +255,8 @@ static void __init mx27ads_regulator_init(void)
 	vchip->set		= vgpio_set;
 	gpiochip_add_data(vchip, NULL);
 
+	gpiod_add_lookup_table(&mx27ads_lcd_regulator_gpiod_table);
+
 	platform_device_register_data(NULL, "reg-fixed-voltage",
 				      PLATFORM_DEVID_AUTO,
 				      &mx27ads_lcd_regulator_pdata,
diff --git a/arch/arm/mach-mmp/brownstone.c b/arch/arm/mach-mmp/brownstone.c
index d1613b954926..563b5a278d65 100644
--- a/arch/arm/mach-mmp/brownstone.c
+++ b/arch/arm/mach-mmp/brownstone.c
@@ -15,6 +15,7 @@
 #include <linux/platform_device.h>
 #include <linux/io.h>
 #include <linux/gpio-pxa.h>
+#include <linux/gpio/machine.h>
 #include <linux/regulator/machine.h>
 #include <linux/regulator/max8649.h>
 #include <linux/regulator/fixed.h>
@@ -148,7 +149,6 @@ static struct regulator_init_data brownstone_v_5vp_data = {
 static struct fixed_voltage_config brownstone_v_5vp = {
 	.supply_name		= "v_5vp",
 	.microvolts		= 5000000,
-	.gpio			= GPIO_5V_ENABLE,
 	.enable_high		= 1,
 	.enabled_at_boot	= 1,
 	.init_data		= &brownstone_v_5vp_data,
@@ -162,6 +162,15 @@ static struct platform_device brownstone_v_5vp_device = {
 	},
 };
 
+static struct gpiod_lookup_table brownstone_v_5vp_gpiod_table = {
+	.dev_id = "reg-fixed-voltage.1", /* .id set to 1 above */
+	.table = {
+		GPIO_LOOKUP("gpio-pxa", GPIO_5V_ENABLE,
+			    "enable", GPIO_ACTIVE_HIGH),
+		{ },
+	},
+};
+
 static struct max8925_platform_data brownstone_max8925_info = {
 	.irq_base		= MMP_NR_IRQS,
 };
@@ -217,6 +226,7 @@ static void __init brownstone_init(void)
 	mmp2_add_isram(&mmp2_isram_platdata);
 
 	/* enable 5v regulator */
+	gpiod_add_lookup_table(&brownstone_v_5vp_gpiod_table);
 	platform_device_register(&brownstone_v_5vp_device);
 }
 
diff --git a/arch/arm/mach-omap1/board-ams-delta.c b/arch/arm/mach-omap1/board-ams-delta.c
index 52e8e53ca154..759fa18f6ab4 100644
--- a/arch/arm/mach-omap1/board-ams-delta.c
+++ b/arch/arm/mach-omap1/board-ams-delta.c
@@ -12,6 +12,7 @@
  * published by the Free Software Foundation.
  */
 #include <linux/gpio/driver.h>
+#include <linux/gpio/machine.h>
 #include <linux/gpio.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
@@ -203,6 +204,7 @@ static struct resource latch2_resources[] = {
 };
 
 static struct bgpio_pdata latch2_pdata = {
+	.label	= "ams-delta-latch2",
 	.base	= AMS_DELTA_LATCH2_GPIO_BASE,
 	.ngpio	= AMS_DELTA_LATCH2_NGPIO,
 };
@@ -272,7 +274,6 @@ static struct regulator_init_data modem_nreset_data = {
 static struct fixed_voltage_config modem_nreset_config = {
 	.supply_name		= "modem_nreset",
 	.microvolts		= 3300000,
-	.gpio			= AMS_DELTA_GPIO_PIN_MODEM_NRESET,
 	.startup_delay		= 25000,
 	.enable_high		= 1,
 	.enabled_at_boot	= 1,
@@ -287,6 +288,16 @@ static struct platform_device modem_nreset_device = {
 	},
 };
 
+static struct gpiod_lookup_table modem_nreset_gpiod_table = {
+	.dev_id = "reg-fixed-voltage",
+	.table = {
+		/* The AMS_DELTA_GPIO_PIN_MODEM_NRESET is at offset 12 */
+		GPIO_LOOKUP("ams-delta-latch2", 12,
+			    "enable", GPIO_ACTIVE_HIGH),
+		{ },
+	},
+};
+
 struct modem_private_data {
 	struct regulator *regulator;
 };
@@ -570,6 +581,7 @@ static int __init late_init(void)
 
 	platform_add_devices(late_devices, ARRAY_SIZE(late_devices));
 
+	gpiod_add_lookup_table(&modem_nreset_gpiod_table);
 	err = platform_device_register(&modem_nreset_device);
 	if (err) {
 		pr_err("Couldn't register the modem regulator device\n");
diff --git a/arch/arm/mach-omap2/pdata-quirks.c b/arch/arm/mach-omap2/pdata-quirks.c
index 6b433fce65a5..4ddde151809c 100644
--- a/arch/arm/mach-omap2/pdata-quirks.c
+++ b/arch/arm/mach-omap2/pdata-quirks.c
@@ -10,6 +10,7 @@
 #include <linux/clk.h>
 #include <linux/davinci_emac.h>
 #include <linux/gpio.h>
+#include <linux/gpio/machine.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/of_platform.h>
@@ -330,7 +331,6 @@ static struct regulator_init_data pandora_vmmc3 = {
 static struct fixed_voltage_config pandora_vwlan = {
 	.supply_name		= "vwlan",
 	.microvolts		= 1800000, /* 1.8V */
-	.gpio			= PANDORA_WIFI_NRESET_GPIO,
 	.startup_delay		= 50000, /* 50ms */
 	.enable_high		= 1,
 	.init_data		= &pandora_vmmc3,
@@ -344,6 +344,19 @@ static struct platform_device pandora_vwlan_device = {
 	},
 };
 
+static struct gpiod_lookup_table pandora_vwlan_gpiod_table = {
+	.dev_id = "reg-fixed-voltage.1",
+	.table = {
+		/*
+		 * As this is a low GPIO number it should be at the first
+		 * GPIO bank.
+		 */
+		GPIO_LOOKUP("gpio-0-31", PANDORA_WIFI_NRESET_GPIO,
+			    "enable", GPIO_ACTIVE_HIGH),
+		{ },
+	},
+};
+
 static void pandora_wl1251_init_card(struct mmc_card *card)
 {
 	/*
@@ -405,6 +418,7 @@ static void __init pandora_wl1251_init(void)
 static void __init omap3_pandora_legacy_init(void)
 {
 	platform_device_register(&pandora_backlight);
+	gpiod_add_lookup_table(&pandora_vwlan_gpiod_table);
 	platform_device_register(&pandora_vwlan_device);
 	omap_hsmmc_init(pandora_mmc3);
 	omap_hsmmc_late_init(pandora_mmc3);
diff --git a/arch/arm/mach-pxa/em-x270.c b/arch/arm/mach-pxa/em-x270.c
index 49022ad338e9..6d7d93981098 100644
--- a/arch/arm/mach-pxa/em-x270.c
+++ b/arch/arm/mach-pxa/em-x270.c
@@ -987,7 +987,6 @@ static struct fixed_voltage_config camera_dummy_config = {
 	.supply_name		= "camera_vdd",
 	.input_supply		= "vcc cam",
 	.microvolts		= 2800000,
-	.gpio			= -1,
 	.enable_high		= 0,
 	.init_data		= &camera_dummy_initdata,
 };
diff --git a/arch/arm/mach-pxa/ezx.c b/arch/arm/mach-pxa/ezx.c
index 2c90b58f347d..2b4bd6d94855 100644
--- a/arch/arm/mach-pxa/ezx.c
+++ b/arch/arm/mach-pxa/ezx.c
@@ -21,6 +21,7 @@
 #include <linux/regulator/fixed.h>
 #include <linux/input.h>
 #include <linux/gpio.h>
+#include <linux/gpio/machine.h>
 #include <linux/gpio_keys.h>
 #include <linux/leds-lp3944.h>
 #include <linux/platform_data/i2c-pxa.h>
@@ -698,31 +699,39 @@ static struct pxa27x_keypad_platform_data e2_keypad_platform_data = {
 
 #if defined(CONFIG_MACH_EZX_A780) || defined(CONFIG_MACH_EZX_A910)
 /* camera */
-static struct regulator_consumer_supply camera_dummy_supplies[] = {
+static struct regulator_consumer_supply camera_regulator_supplies[] = {
 	REGULATOR_SUPPLY("vdd", "0-005d"),
 };
 
-static struct regulator_init_data camera_dummy_initdata = {
-	.consumer_supplies = camera_dummy_supplies,
-	.num_consumer_supplies = ARRAY_SIZE(camera_dummy_supplies),
+static struct regulator_init_data camera_regulator_initdata = {
+	.consumer_supplies = camera_regulator_supplies,
+	.num_consumer_supplies = ARRAY_SIZE(camera_regulator_supplies),
 	.constraints = {
 		.valid_ops_mask = REGULATOR_CHANGE_STATUS,
 	},
 };
 
-static struct fixed_voltage_config camera_dummy_config = {
+static struct fixed_voltage_config camera_regulator_config = {
 	.supply_name		= "camera_vdd",
 	.microvolts		= 2800000,
-	.gpio			= GPIO50_nCAM_EN,
 	.enable_high		= 0,
-	.init_data		= &camera_dummy_initdata,
+	.init_data		= &camera_regulator_initdata,
 };
 
-static struct platform_device camera_supply_dummy_device = {
+static struct platform_device camera_supply_regulator_device = {
 	.name	= "reg-fixed-voltage",
 	.id	= 1,
 	.dev	= {
-		.platform_data = &camera_dummy_config,
+		.platform_data = &camera_regulator_config,
+	},
+};
+
+static struct gpiod_lookup_table camera_supply_gpiod_table = {
+	.dev_id = "reg-fixed-voltage.1",
+	.table = {
+		GPIO_LOOKUP("gpio-pxa", GPIO50_nCAM_EN,
+			    "enable", GPIO_ACTIVE_HIGH),
+		{ },
 	},
 };
 #endif
@@ -800,7 +809,7 @@ static struct i2c_board_info a780_i2c_board_info[] = {
 
 static struct platform_device *a780_devices[] __initdata = {
 	&a780_gpio_keys,
-	&camera_supply_dummy_device,
+	&camera_supply_regulator_device,
 };
 
 static void __init a780_init(void)
@@ -823,6 +832,7 @@ static void __init a780_init(void)
 	if (a780_camera_init() == 0)
 		pxa_set_camera_info(&a780_pxacamera_platform_data);
 
+	gpiod_add_lookup_table(&camera_supply_gpiod_table);
 	pwm_add_table(ezx_pwm_lookup, ARRAY_SIZE(ezx_pwm_lookup));
 	platform_add_devices(ARRAY_AND_SIZE(ezx_devices));
 	platform_add_devices(ARRAY_AND_SIZE(a780_devices));
@@ -892,6 +902,7 @@ static void __init e680_init(void)
 
 	pxa_set_keypad_info(&e680_keypad_platform_data);
 
+	gpiod_add_lookup_table(&camera_supply_gpiod_table);
 	pwm_add_table(ezx_pwm_lookup, ARRAY_SIZE(ezx_pwm_lookup));
 	platform_add_devices(ARRAY_AND_SIZE(ezx_devices));
 	platform_add_devices(ARRAY_AND_SIZE(e680_devices));
@@ -1098,7 +1109,7 @@ static struct i2c_board_info __initdata a910_i2c_board_info[] = {
 
 static struct platform_device *a910_devices[] __initdata = {
 	&a910_gpio_keys,
-	&camera_supply_dummy_device,
+	&camera_supply_regulator_device,
 };
 
 static void __init a910_init(void)
diff --git a/arch/arm/mach-pxa/magician.c b/arch/arm/mach-pxa/magician.c
index c5325d1ae77b..14c0f80bc9e7 100644
--- a/arch/arm/mach-pxa/magician.c
+++ b/arch/arm/mach-pxa/magician.c
@@ -18,6 +18,7 @@
 #include <linux/platform_device.h>
 #include <linux/delay.h>
 #include <linux/gpio.h>
+#include <linux/gpio/machine.h>
 #include <linux/gpio_keys.h>
 #include <linux/input.h>
 #include <linux/mfd/htc-pasic3.h>
@@ -696,7 +697,6 @@ static struct regulator_init_data vads7846_regulator = {
 static struct fixed_voltage_config vads7846 = {
 	.supply_name	= "vads7846",
 	.microvolts	= 3300000, /* probably */
-	.gpio		= -EINVAL,
 	.startup_delay	= 0,
 	.init_data	= &vads7846_regulator,
 };
diff --git a/arch/arm/mach-pxa/raumfeld.c b/arch/arm/mach-pxa/raumfeld.c
index 4d5d05cf87d6..58833dcd2293 100644
--- a/arch/arm/mach-pxa/raumfeld.c
+++ b/arch/arm/mach-pxa/raumfeld.c
@@ -875,7 +875,6 @@ static struct regulator_init_data audio_va_initdata = {
 static struct fixed_voltage_config audio_va_config = {
 	.supply_name		= "audio_va",
 	.microvolts		= 5000000,
-	.gpio			= GPIO_AUDIO_VA_ENABLE,
 	.enable_high		= 1,
 	.enabled_at_boot	= 0,
 	.init_data		= &audio_va_initdata,
@@ -889,6 +888,15 @@ static struct platform_device audio_va_device = {
 	},
 };
 
+static struct gpiod_lookup_table audio_va_gpiod_table = {
+	.dev_id = "reg-fixed-voltage.0",
+	.table = {
+		GPIO_LOOKUP("gpio-pxa", GPIO_AUDIO_VA_ENABLE,
+			    "enable", GPIO_ACTIVE_HIGH),
+		{ },
+	},
+};
+
 /* Dummy supplies for Codec's VD/VLC */
 
 static struct regulator_consumer_supply audio_dummy_supplies[] = {
@@ -907,7 +915,6 @@ static struct regulator_init_data audio_dummy_initdata = {
 static struct fixed_voltage_config audio_dummy_config = {
 	.supply_name		= "audio_vd",
 	.microvolts		= 3300000,
-	.gpio			= -1,
 	.init_data		= &audio_dummy_initdata,
 };
 
@@ -1022,6 +1029,7 @@ static void __init raumfeld_audio_init(void)
 	else
 		gpio_direction_output(GPIO_MCLK_RESET, 1);
 
+	gpiod_add_lookup_table(&audio_va_gpiod_table);
 	platform_add_devices(ARRAY_AND_SIZE(audio_regulator_devices));
 }
 
diff --git a/arch/arm/mach-pxa/zeus.c b/arch/arm/mach-pxa/zeus.c
index e3851795d6d7..58e05afcece0 100644
--- a/arch/arm/mach-pxa/zeus.c
+++ b/arch/arm/mach-pxa/zeus.c
@@ -17,6 +17,7 @@
 #include <linux/irq.h>
 #include <linux/pm.h>
 #include <linux/gpio.h>
+#include <linux/gpio/machine.h>
 #include <linux/serial_8250.h>
 #include <linux/dm9000.h>
 #include <linux/mmc/host.h>
@@ -410,7 +411,6 @@ static struct regulator_init_data can_regulator_init_data = {
 static struct fixed_voltage_config can_regulator_pdata = {
 	.supply_name	= "CAN_SHDN",
 	.microvolts	= 3300000,
-	.gpio		= ZEUS_CAN_SHDN_GPIO,
 	.init_data	= &can_regulator_init_data,
 };
 
@@ -422,6 +422,15 @@ static struct platform_device can_regulator_device = {
 	},
 };
 
+static struct gpiod_lookup_table can_regulator_gpiod_table = {
+	.dev_id = "reg-fixed-voltage.0",
+	.table = {
+		GPIO_LOOKUP("gpio-pxa", ZEUS_CAN_SHDN_GPIO,
+			    "enable", GPIO_ACTIVE_HIGH),
+		{ },
+	},
+};
+
 static struct mcp251x_platform_data zeus_mcp2515_pdata = {
 	.oscillator_frequency	= 16*1000*1000,
 };
@@ -538,7 +547,6 @@ static struct regulator_init_data zeus_ohci_regulator_data = {
 static struct fixed_voltage_config zeus_ohci_regulator_config = {
 	.supply_name		= "vbus2",
 	.microvolts		= 5000000, /* 5.0V */
-	.gpio			= ZEUS_USB2_PWREN_GPIO,
 	.enable_high		= 1,
 	.startup_delay		= 0,
 	.init_data		= &zeus_ohci_regulator_data,
@@ -552,6 +560,15 @@ static struct platform_device zeus_ohci_regulator_device = {
 	},
 };
 
+static struct gpiod_lookup_table zeus_ohci_regulator_gpiod_table = {
+	.dev_id = "reg-fixed-voltage.0",
+	.table = {
+		GPIO_LOOKUP("gpio-pxa", ZEUS_USB2_PWREN_GPIO,
+			    "enable", GPIO_ACTIVE_HIGH),
+		{ },
+	},
+};
+
 static struct pxaohci_platform_data zeus_ohci_platform_data = {
 	.port_mode	= PMM_NPS_MODE,
 	/* Clear Power Control Polarity Low and set Power Sense
@@ -855,6 +872,8 @@ static void __init zeus_init(void)
 
 	pxa2xx_mfp_config(ARRAY_AND_SIZE(zeus_pin_config));
 
+	gpiod_add_lookup_table(&can_regulator_gpiod_table);
+	gpiod_add_lookup_table(&zeus_ohci_regulator_gpiod_table);
 	platform_add_devices(zeus_devices, ARRAY_SIZE(zeus_devices));
 
 	zeus_register_ohci();
diff --git a/arch/arm/mach-s3c64xx/mach-crag6410.c b/arch/arm/mach-s3c64xx/mach-crag6410.c
index f04650297487..379424d72ae7 100644
--- a/arch/arm/mach-s3c64xx/mach-crag6410.c
+++ b/arch/arm/mach-s3c64xx/mach-crag6410.c
@@ -352,7 +352,6 @@ static struct fixed_voltage_config wallvdd_pdata = {
 	.supply_name = "WALLVDD",
 	.microvolts = 5000000,
 	.init_data = &wallvdd_data,
-	.gpio = -EINVAL,
 };
 
 static struct platform_device wallvdd_device = {
diff --git a/arch/arm/mach-s3c64xx/mach-smdk6410.c b/arch/arm/mach-s3c64xx/mach-smdk6410.c
index c46fa5dfd2e0..908e5aa831c8 100644
--- a/arch/arm/mach-s3c64xx/mach-smdk6410.c
+++ b/arch/arm/mach-s3c64xx/mach-smdk6410.c
@@ -222,7 +222,6 @@ static struct fixed_voltage_config smdk6410_b_pwr_5v_pdata = {
 	.supply_name = "B_PWR_5V",
 	.microvolts = 5000000,
 	.init_data = &smdk6410_b_pwr_5v_data,
-	.gpio = -EINVAL,
 };
 
 static struct platform_device smdk6410_b_pwr_5v = {
diff --git a/arch/blackfin/mach-bf537/boards/stamp.c b/arch/blackfin/mach-bf537/boards/stamp.c
index 400e6693643e..0adc34e8c975 100644
--- a/arch/blackfin/mach-bf537/boards/stamp.c
+++ b/arch/blackfin/mach-bf537/boards/stamp.c
@@ -39,6 +39,7 @@
 #include <asm/bfin_sport.h>
 #ifdef CONFIG_REGULATOR_FIXED_VOLTAGE
 #include <linux/regulator/fixed.h>
+#include <linux/gpio/machine.h>
 #endif
 #include <linux/regulator/machine.h>
 #include <linux/regulator/consumer.h>
@@ -2695,7 +2696,6 @@ static struct regulator_init_data adp_switch_regulator_data = {
 static struct fixed_voltage_config adp_switch_pdata = {
 	.supply_name = REGULATOR_ADP122,
 	.microvolts = REGULATOR_ADP122_UV,
-	.gpio = GPIO_PF2,
 	.enable_high = 1,
 	.enabled_at_boot = 0,
 	.init_data = &adp_switch_regulator_data,
@@ -2709,6 +2709,15 @@ static struct platform_device adp_switch_device = {
 	},
 };
 
+static struct gpiod_lookup_table adp_switch_gpiod_table = {
+	.dev_id = "reg-fixed-voltage.0",
+	.table = {
+		GPIO_LOOKUP("BFIN-GPIO", GPIO_PF2,
+			    "enable", GPIO_ACTIVE_HIGH),
+		{ },
+	},
+};
+
 #if IS_ENABLED(CONFIG_REGULATOR_USERSPACE_CONSUMER)
 static struct regulator_bulk_data adp122_bulk_data = {
 	.supply = REGULATOR_ADP122,
@@ -2958,6 +2967,9 @@ static int __init stamp_init(void)
 	printk(KERN_INFO "%s(): registering device resources\n", __func__);
 	bfin_plat_nand_init();
 	adf702x_mac_init();
+#if IS_ENABLED(CONFIG_REGULATOR_FIXED_VOLTAGE)
+	gpiod_add_lookup_table(&adp_switch_gpiod_table);
+#endif
 	platform_add_devices(stamp_devices, ARRAY_SIZE(stamp_devices));
 	i2c_register_board_info(0, bfin_i2c_board_info,
 				ARRAY_SIZE(bfin_i2c_board_info));
diff --git a/arch/sh/boards/mach-ecovec24/setup.c b/arch/sh/boards/mach-ecovec24/setup.c
index 6f929abe0b50..2b8472431f02 100644
--- a/arch/sh/boards/mach-ecovec24/setup.c
+++ b/arch/sh/boards/mach-ecovec24/setup.c
@@ -16,6 +16,7 @@
 #include <linux/mtd/physmap.h>
 #include <linux/mfd/tmio.h>
 #include <linux/gpio.h>
+#include <linux/gpio/machine.h>
 #include <linux/interrupt.h>
 #include <linux/io.h>
 #include <linux/delay.h>
@@ -554,7 +555,6 @@ static struct regulator_init_data cn12_power_init_data = {
 static struct fixed_voltage_config cn12_power_info = {
 	.supply_name = "CN12 SD/MMC Vdd",
 	.microvolts = 3300000,
-	.gpio = GPIO_PTB7,
 	.enable_high = 1,
 	.init_data = &cn12_power_init_data,
 };
@@ -567,6 +567,16 @@ static struct platform_device cn12_power = {
 	},
 };
 
+static struct gpiod_lookup_table cn12_power_gpiod_table = {
+	.dev_id = "reg-fixed-voltage.0",
+	.table = {
+		/* Offset 7 on port B */
+		GPIO_LOOKUP("sh7724_pfc", GPIO_PTB7,
+			    "enable", GPIO_ACTIVE_HIGH),
+		{ },
+	},
+};
+
 #if defined(CONFIG_MMC_SDHI) || defined(CONFIG_MMC_SDHI_MODULE)
 /* SDHI0 */
 static struct regulator_consumer_supply sdhi0_power_consumers[] =
@@ -586,7 +596,6 @@ static struct regulator_init_data sdhi0_power_init_data = {
 static struct fixed_voltage_config sdhi0_power_info = {
 	.supply_name = "CN11 SD/MMC Vdd",
 	.microvolts = 3300000,
-	.gpio = GPIO_PTB6,
 	.enable_high = 1,
 	.init_data = &sdhi0_power_init_data,
 };
@@ -599,6 +608,16 @@ static struct platform_device sdhi0_power = {
 	},
 };
 
+static struct gpiod_lookup_table sdhi0_power_gpiod_table = {
+	.dev_id = "reg-fixed-voltage.1",
+	.table = {
+		/* Offset 6 on port B */
+		GPIO_LOOKUP("sh7724_pfc", GPIO_PTB6,
+			    "enable", GPIO_ACTIVE_HIGH),
+		{ },
+	},
+};
+
 static struct tmio_mmc_data sdhi0_info = {
 	.chan_priv_tx	= (void *)SHDMA_SLAVE_SDHI0_TX,
 	.chan_priv_rx	= (void *)SHDMA_SLAVE_SDHI0_RX,
@@ -1431,6 +1450,10 @@ static int __init arch_setup(void)
 	gpio_set_value(GPIO_PTG4, 1);
 #endif
 
+	gpiod_add_lookup_table(&cn12_power_gpiod_table);
+#if defined(CONFIG_MMC_SDHI) || defined(CONFIG_MMC_SDHI_MODULE)
+	gpiod_add_lookup_table(&sdhi0_power_gpiod_table);
+#endif
 	return platform_add_devices(ecovec_devices,
 				    ARRAY_SIZE(ecovec_devices));
 }
diff --git a/arch/x86/platform/intel-mid/device_libs/platform_bcm43xx.c b/arch/x86/platform/intel-mid/device_libs/platform_bcm43xx.c
index 4392c15ed9e0..d185d3696fc5 100644
--- a/arch/x86/platform/intel-mid/device_libs/platform_bcm43xx.c
+++ b/arch/x86/platform/intel-mid/device_libs/platform_bcm43xx.c
@@ -10,7 +10,7 @@
  * of the License.
  */
 
-#include <linux/gpio.h>
+#include <linux/gpio/machine.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/machine.h>
 #include <linux/regulator/fixed.h>
@@ -43,7 +43,6 @@ static struct fixed_voltage_config bcm43xx_vmmc = {
 	 * real voltage and signaling are still 1.8V.
 	 */
 	.microvolts		= 2000000,		/* 1.8V */
-	.gpio			= -EINVAL,
 	.startup_delay		= 250 * 1000,		/* 250ms */
 	.enable_high		= 1,			/* active high */
 	.enabled_at_boot	= 0,			/* disabled at boot */
@@ -58,11 +57,25 @@ static struct platform_device bcm43xx_vmmc_regulator = {
 	},
 };
 
+static struct gpiod_lookup_table bcm43xx_vmmc_gpio_table = {
+	.dev_id	= "reg-fixed-voltage.0",
+	.table	= {
+		/* CHECKME: is this the correct PCI address for the GPIO controller? */
+		GPIO_LOOKUP("0000:00:0c.0", -1, "enable", GPIO_ACTIVE_LOW),
+		{ },
+	},
+};
+
 static int __init bcm43xx_regulator_register(void)
 {
+	struct gpiod_lookup_table *table = &bcm43xx_vmmc_gpio_table;
+	struct gpiod_lookup *lookup = table->table;
 	int ret;
 
-	bcm43xx_vmmc.gpio = get_gpio_by_name(WLAN_SFI_GPIO_ENABLE_NAME);
+	/* FIXME: convert SFI layer to use GPIO descriptors internally */
+	lookup[0].chip_hwnum = get_gpio_by_name(WLAN_SFI_GPIO_ENABLE_NAME);
+	gpiod_add_lookup_table(table);
+
 	ret = platform_device_register(&bcm43xx_vmmc_regulator);
 	if (ret) {
 		pr_err("%s: vmmc regulator register failed\n", __func__);
diff --git a/drivers/regulator/fixed-helper.c b/drivers/regulator/fixed-helper.c
index 777fac6fb4cb..2c6098e6f4bc 100644
--- a/drivers/regulator/fixed-helper.c
+++ b/drivers/regulator/fixed-helper.c
@@ -43,7 +43,6 @@ struct platform_device *regulator_register_always_on(int id, const char *name,
 	}
 
 	data->cfg.microvolts = uv;
-	data->cfg.gpio = -EINVAL;
 	data->cfg.enabled_at_boot = 1;
 	data->cfg.init_data = &data->init_data;
 
diff --git a/drivers/regulator/fixed.c b/drivers/regulator/fixed.c
index 988a7472c2ab..1142f195529b 100644
--- a/drivers/regulator/fixed.c
+++ b/drivers/regulator/fixed.c
@@ -24,10 +24,9 @@
 #include <linux/platform_device.h>
 #include <linux/regulator/driver.h>
 #include <linux/regulator/fixed.h>
-#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/slab.h>
 #include <linux/of.h>
-#include <linux/of_gpio.h>
 #include <linux/regulator/of_regulator.h>
 #include <linux/regulator/machine.h>
 
@@ -78,10 +77,6 @@ of_get_fixed_voltage_config(struct device *dev,
 	if (init_data->constraints.boot_on)
 		config->enabled_at_boot = true;
 
-	config->gpio = of_get_named_gpio(np, "gpio", 0);
-	if ((config->gpio < 0) && (config->gpio != -ENOENT))
-		return ERR_PTR(config->gpio);
-
 	of_property_read_u32(np, "startup-delay-us", &config->startup_delay);
 
 	config->enable_high = of_property_read_bool(np, "enable-active-high");
@@ -102,6 +97,7 @@ static int reg_fixed_voltage_probe(struct platform_device *pdev)
 	struct fixed_voltage_config *config;
 	struct fixed_voltage_data *drvdata;
 	struct regulator_config cfg = { };
+	enum gpiod_flags gflags;
 	int ret;
 
 	drvdata = devm_kzalloc(&pdev->dev, sizeof(struct fixed_voltage_data),
@@ -150,25 +146,28 @@ static int reg_fixed_voltage_probe(struct platform_device *pdev)
 
 	drvdata->desc.fixed_uV = config->microvolts;
 
-	if (gpio_is_valid(config->gpio)) {
-		cfg.ena_gpio = config->gpio;
-		if (pdev->dev.of_node)
-			cfg.ena_gpio_initialized = true;
-	}
 	cfg.ena_gpio_invert = !config->enable_high;
 	if (config->enabled_at_boot) {
 		if (config->enable_high)
-			cfg.ena_gpio_flags |= GPIOF_OUT_INIT_HIGH;
+			gflags = GPIOD_OUT_HIGH;
 		else
-			cfg.ena_gpio_flags |= GPIOF_OUT_INIT_LOW;
+			gflags = GPIOD_OUT_LOW;
 	} else {
 		if (config->enable_high)
-			cfg.ena_gpio_flags |= GPIOF_OUT_INIT_LOW;
+			gflags = GPIOD_OUT_LOW;
 		else
-			cfg.ena_gpio_flags |= GPIOF_OUT_INIT_HIGH;
+			gflags = GPIOD_OUT_HIGH;
 	}
-	if (config->gpio_is_open_drain)
-		cfg.ena_gpio_flags |= GPIOF_OPEN_DRAIN;
+	if (config->gpio_is_open_drain) {
+		if (gflags == GPIOD_OUT_HIGH)
+			gflags = GPIOD_OUT_HIGH_OPEN_DRAIN;
+		else
+			gflags = GPIOD_OUT_LOW_OPEN_DRAIN;
+	}
+
+	cfg.ena_gpiod = devm_gpiod_get_optional(&pdev->dev, NULL, gflags);
+	if (IS_ERR(cfg.ena_gpiod))
+		return PTR_ERR(cfg.ena_gpiod);
 
 	cfg.dev = &pdev->dev;
 	cfg.init_data = config->init_data;
diff --git a/include/linux/regulator/fixed.h b/include/linux/regulator/fixed.h
index 48918be649d4..1a4340ed8e2b 100644
--- a/include/linux/regulator/fixed.h
+++ b/include/linux/regulator/fixed.h
@@ -24,8 +24,6 @@ struct regulator_init_data;
  * @supply_name:	Name of the regulator supply
  * @input_supply:	Name of the input regulator supply
  * @microvolts:		Output voltage of regulator
- * @gpio:		GPIO to use for enable control
- * 			set to -EINVAL if not used
  * @startup_delay:	Start-up time in microseconds
  * @gpio_is_open_drain: Gpio pin is open drain or normal type.
  *			If it is open drain type then HIGH will be set
@@ -49,7 +47,6 @@ struct fixed_voltage_config {
 	const char *supply_name;
 	const char *input_supply;
 	int microvolts;
-	int gpio;
 	unsigned startup_delay;
 	unsigned gpio_is_open_drain:1;
 	unsigned enable_high:1;
-- 
2.14.3

^ permalink raw reply	[flat|nested] 54+ messages in thread

* [PATCH 03/21] regulator: gpio: Get enable GPIO using GPIO descriptor
  2018-02-12 13:16 [PATCH 00/21] regulator: switch core to GPIO descriptors Linus Walleij
  2018-02-12 13:16 ` [PATCH 01/21] regulator: core: Support passing an initialized GPIO enable descriptor Linus Walleij
  2018-02-12 13:16 ` [PATCH 02/21] regulator: fixed: Convert to use GPIO descriptor only Linus Walleij
@ 2018-02-12 13:16 ` Linus Walleij
  2018-05-29 14:59   ` Applied "regulator: gpio: Get enable GPIO using GPIO descriptor" to the regulator tree Mark Brown
  2018-02-12 13:17 ` [PATCH 04/21] regulator: da9055: Pass descriptor instead of GPIO number Linus Walleij
                   ` (17 subsequent siblings)
  20 siblings, 1 reply; 54+ messages in thread
From: Linus Walleij @ 2018-02-12 13:16 UTC (permalink / raw)
  To: Liam Girdwood, Mark Brown
  Cc: linux-kernel, linux-gpio, Linus Walleij, Philipp Zabel

We augment the GPIO regulator to get the *enable* regulator
GPIO line (not the other lines) using a descriptor rather than
a global number.

We then pass this into the regulator core which has been
prepared to hande enable descriptors in a separate patch.

Switch over the two boardfiles using this facility and clean
up so we only pass descriptors around.

Cc: Philipp Zabel <philipp.zabel@gmail.com> # HX4700/Magician maintainer
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
 arch/arm/mach-pxa/hx4700.c               | 12 +++++++++++-
 arch/arm/mach-pxa/magician.c             | 11 ++++++++++-
 drivers/regulator/gpio-regulator.c       | 23 +++++++++++------------
 include/linux/regulator/gpio-regulator.h |  3 ---
 4 files changed, 32 insertions(+), 17 deletions(-)

diff --git a/arch/arm/mach-pxa/hx4700.c b/arch/arm/mach-pxa/hx4700.c
index e2e7f247a645..6717a10180eb 100644
--- a/arch/arm/mach-pxa/hx4700.c
+++ b/arch/arm/mach-pxa/hx4700.c
@@ -20,6 +20,7 @@
 #include <linux/delay.h>
 #include <linux/fb.h>
 #include <linux/gpio.h>
+#include <linux/gpio/machine.h>
 #include <linux/gpio_keys.h>
 #include <linux/input.h>
 #include <linux/input/navpoint.h>
@@ -711,7 +712,6 @@ static struct gpio_regulator_state bq24022_states[] = {
 static struct gpio_regulator_config bq24022_info = {
 	.supply_name = "bq24022",
 
-	.enable_gpio = GPIO72_HX4700_BQ24022_nCHARGE_EN,
 	.enable_high = 0,
 	.enabled_at_boot = 0,
 
@@ -733,6 +733,15 @@ static struct platform_device bq24022 = {
 	},
 };
 
+static struct gpiod_lookup_table bq24022_gpiod_table = {
+	.dev_id = "gpio-regulator",
+	.table = {
+		GPIO_LOOKUP("gpio-pxa", GPIO72_HX4700_BQ24022_nCHARGE_EN,
+			    "enable", GPIO_ACTIVE_HIGH),
+		{ },
+	},
+};
+
 /*
  * StrataFlash
  */
@@ -875,6 +884,7 @@ static void __init hx4700_init(void)
 	pxa_set_btuart_info(NULL);
 	pxa_set_stuart_info(NULL);
 
+	gpiod_add_lookup_table(&bq24022_gpiod_table);
 	platform_add_devices(devices, ARRAY_SIZE(devices));
 	pwm_add_table(hx4700_pwm_lookup, ARRAY_SIZE(hx4700_pwm_lookup));
 
diff --git a/arch/arm/mach-pxa/magician.c b/arch/arm/mach-pxa/magician.c
index 14c0f80bc9e7..9a5bda3ea194 100644
--- a/arch/arm/mach-pxa/magician.c
+++ b/arch/arm/mach-pxa/magician.c
@@ -657,7 +657,6 @@ static struct gpio_regulator_state bq24022_states[] = {
 static struct gpio_regulator_config bq24022_info = {
 	.supply_name		= "bq24022",
 
-	.enable_gpio		= GPIO30_MAGICIAN_BQ24022_nCHARGE_EN,
 	.enable_high		= 0,
 	.enabled_at_boot	= 1,
 
@@ -679,6 +678,15 @@ static struct platform_device bq24022 = {
 	},
 };
 
+static struct gpiod_lookup_table bq24022_gpiod_table = {
+	.dev_id = "gpio-regulator",
+	.table = {
+		GPIO_LOOKUP("gpio-pxa", GPIO30_MAGICIAN_BQ24022_nCHARGE_EN,
+			    "enable", GPIO_ACTIVE_HIGH),
+		{ },
+	},
+};
+
 /*
  * fixed regulator for ads7846
  */
@@ -1007,6 +1015,7 @@ static void __init magician_init(void)
 	regulator_register_always_on(0, "power", pwm_backlight_supply,
 		ARRAY_SIZE(pwm_backlight_supply), 5000000);
 
+	gpiod_add_lookup_table(&bq24022_gpiod_table);
 	platform_add_devices(ARRAY_AND_SIZE(devices));
 }
 
diff --git a/drivers/regulator/gpio-regulator.c b/drivers/regulator/gpio-regulator.c
index 0fce06acfaec..172ca4c578b2 100644
--- a/drivers/regulator/gpio-regulator.c
+++ b/drivers/regulator/gpio-regulator.c
@@ -31,6 +31,7 @@
 #include <linux/regulator/of_regulator.h>
 #include <linux/regulator/gpio-regulator.h>
 #include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/slab.h>
 #include <linux/of.h>
 #include <linux/of_gpio.h>
@@ -161,10 +162,6 @@ of_get_gpio_regulator_config(struct device *dev, struct device_node *np,
 
 	of_property_read_u32(np, "startup-delay-us", &config->startup_delay);
 
-	config->enable_gpio = of_get_named_gpio(np, "enable-gpio", 0);
-	if (config->enable_gpio < 0 && config->enable_gpio != -ENOENT)
-		return ERR_PTR(config->enable_gpio);
-
 	/* Fetch GPIOs. - optional property*/
 	ret = of_gpio_count(np);
 	if ((ret < 0) && (ret != -ENOENT))
@@ -254,6 +251,7 @@ static int gpio_regulator_probe(struct platform_device *pdev)
 	struct device_node *np = pdev->dev.of_node;
 	struct gpio_regulator_data *drvdata;
 	struct regulator_config cfg = { };
+	enum gpiod_flags gflags;
 	int ptr, ret, state;
 
 	drvdata = devm_kzalloc(&pdev->dev, sizeof(struct gpio_regulator_data),
@@ -340,21 +338,22 @@ static int gpio_regulator_probe(struct platform_device *pdev)
 	cfg.driver_data = drvdata;
 	cfg.of_node = np;
 
-	if (gpio_is_valid(config->enable_gpio)) {
-		cfg.ena_gpio = config->enable_gpio;
-		cfg.ena_gpio_initialized = true;
-	}
 	cfg.ena_gpio_invert = !config->enable_high;
 	if (config->enabled_at_boot) {
 		if (config->enable_high)
-			cfg.ena_gpio_flags |= GPIOF_OUT_INIT_HIGH;
+			gflags = GPIOD_OUT_HIGH;
 		else
-			cfg.ena_gpio_flags |= GPIOF_OUT_INIT_LOW;
+			gflags = GPIOD_OUT_LOW;
 	} else {
 		if (config->enable_high)
-			cfg.ena_gpio_flags |= GPIOF_OUT_INIT_LOW;
+			gflags = GPIOD_OUT_LOW;
 		else
-			cfg.ena_gpio_flags |= GPIOF_OUT_INIT_HIGH;
+			gflags = GPIOD_OUT_HIGH;
+	}
+	cfg.ena_gpiod = devm_gpiod_get_optional(&pdev->dev, "enable", gflags);
+	if (IS_ERR(cfg.ena_gpiod)) {
+		ret = PTR_ERR(cfg.ena_gpiod);
+		goto err_stategpio;
 	}
 
 	drvdata->dev = regulator_register(&drvdata->desc, &cfg);
diff --git a/include/linux/regulator/gpio-regulator.h b/include/linux/regulator/gpio-regulator.h
index 19fbd267406d..536cab86f2d5 100644
--- a/include/linux/regulator/gpio-regulator.h
+++ b/include/linux/regulator/gpio-regulator.h
@@ -44,8 +44,6 @@ struct gpio_regulator_state {
 /**
  * struct gpio_regulator_config - config structure
  * @supply_name:	Name of the regulator supply
- * @enable_gpio:	GPIO to use for enable control
- *			set to -EINVAL if not used
  * @enable_high:	Polarity of enable GPIO
  *			1 = Active high, 0 = Active low
  * @enabled_at_boot:	Whether regulator has been enabled at
@@ -69,7 +67,6 @@ struct gpio_regulator_state {
 struct gpio_regulator_config {
 	const char *supply_name;
 
-	int enable_gpio;
 	unsigned enable_high:1;
 	unsigned enabled_at_boot:1;
 	unsigned startup_delay;
-- 
2.14.3

^ permalink raw reply	[flat|nested] 54+ messages in thread

* [PATCH 04/21] regulator: da9055: Pass descriptor instead of GPIO number
  2018-02-12 13:16 [PATCH 00/21] regulator: switch core to GPIO descriptors Linus Walleij
                   ` (2 preceding siblings ...)
  2018-02-12 13:16 ` [PATCH 03/21] regulator: gpio: Get enable GPIO using GPIO descriptor Linus Walleij
@ 2018-02-12 13:17 ` Linus Walleij
  2018-02-12 14:59   ` Lee Jones
  2018-02-16 17:12   ` Applied "regulator: da9055: Pass descriptor instead of GPIO number" to the regulator tree Mark Brown
  2018-02-12 13:17 ` [PATCH 05/21] regulator: arizona-ldo1: Look up a descriptor and pass to the core Linus Walleij
                   ` (16 subsequent siblings)
  20 siblings, 2 replies; 54+ messages in thread
From: Linus Walleij @ 2018-02-12 13:17 UTC (permalink / raw)
  To: Liam Girdwood, Mark Brown
  Cc: linux-kernel, linux-gpio, Linus Walleij, Lee Jones

When setting up a fixed regulator on the DA9055, pass a descriptor
instead of a global GPIO number. This facility is not used in the
kernel so we can easily just say that this should be a descriptor
if/when put to use.

Cc: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
Lee: would be nice if you could ACK this smallish patch
to the MFD header.
---
 drivers/regulator/da9055-regulator.c | 4 ++--
 include/linux/mfd/da9055/pdata.h     | 5 +++--
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/regulator/da9055-regulator.c b/drivers/regulator/da9055-regulator.c
index d029c941a1e1..f40c3b8644ae 100644
--- a/drivers/regulator/da9055-regulator.c
+++ b/drivers/regulator/da9055-regulator.c
@@ -16,6 +16,7 @@
 #include <linux/init.h>
 #include <linux/err.h>
 #include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/driver.h>
 #include <linux/regulator/machine.h>
@@ -455,8 +456,7 @@ static int da9055_gpio_init(struct da9055_regulator *regulator,
 		char name[18];
 		int gpio_mux = pdata->gpio_ren[id];
 
-		config->ena_gpio = pdata->ena_gpio[id];
-		config->ena_gpio_flags = GPIOF_OUT_INIT_HIGH;
+		config->ena_gpiod = pdata->ena_gpiods[id];
 		config->ena_gpio_invert = 1;
 
 		/*
diff --git a/include/linux/mfd/da9055/pdata.h b/include/linux/mfd/da9055/pdata.h
index 04e092be4b07..1a94fa2ac309 100644
--- a/include/linux/mfd/da9055/pdata.h
+++ b/include/linux/mfd/da9055/pdata.h
@@ -12,6 +12,7 @@
 #define DA9055_MAX_REGULATORS	8
 
 struct da9055;
+struct gpio_desc;
 
 enum gpio_select {
 	NO_GPIO = 0,
@@ -47,7 +48,7 @@ struct da9055_pdata {
 	 * controls the regulator set A/B, 0 if  not available.
 	 */
 	enum gpio_select *reg_rsel;
-	/* GPIOs to enable regulator, 0 if not available */
-	int *ena_gpio;
+	/* GPIO descriptors to enable regulator, NULL if not available */
+	struct gpio_desc **ena_gpiods;
 };
 #endif /* __DA9055_PDATA_H */
-- 
2.14.3

^ permalink raw reply	[flat|nested] 54+ messages in thread

* [PATCH 05/21] regulator: arizona-ldo1: Look up a descriptor and pass to the core
  2018-02-12 13:16 [PATCH 00/21] regulator: switch core to GPIO descriptors Linus Walleij
                   ` (3 preceding siblings ...)
  2018-02-12 13:17 ` [PATCH 04/21] regulator: da9055: Pass descriptor instead of GPIO number Linus Walleij
@ 2018-02-12 13:17 ` Linus Walleij
  2018-02-13 11:06   ` Charles Keepax
  2018-02-13 11:51   ` Charles Keepax
  2018-02-12 13:17 ` [PATCH 06/21] regulator: da9211: Pass descriptors instead of GPIO numbers Linus Walleij
                   ` (15 subsequent siblings)
  20 siblings, 2 replies; 54+ messages in thread
From: Linus Walleij @ 2018-02-12 13:17 UTC (permalink / raw)
  To: Liam Girdwood, Mark Brown
  Cc: linux-kernel, linux-gpio, Linus Walleij, patches, Richard Fitzgerald

Instead of passing a global GPIO number, pass a descriptor looked
up with the standard devm_gpiod_get_optional() call.

We have augmented the GPIO core to look up the regulator special
GPIO "wlf,ldoena" in a separate patch.

Cc: patches@opensource.cirrus.com
Cc: Richard Fitzgerald <rf@opensource.cirrus.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
 drivers/regulator/arizona-ldo1.c       | 19 ++++++-------------
 include/linux/regulator/arizona-ldo1.h |  3 ---
 2 files changed, 6 insertions(+), 16 deletions(-)

diff --git a/drivers/regulator/arizona-ldo1.c b/drivers/regulator/arizona-ldo1.c
index 96fddfff5dc4..f6d6a4ad9e8a 100644
--- a/drivers/regulator/arizona-ldo1.c
+++ b/drivers/regulator/arizona-ldo1.c
@@ -17,12 +17,11 @@
 #include <linux/bitops.h>
 #include <linux/err.h>
 #include <linux/of.h>
-#include <linux/of_gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/driver.h>
 #include <linux/regulator/machine.h>
 #include <linux/regulator/of_regulator.h>
-#include <linux/gpio.h>
 #include <linux/slab.h>
 
 #include <linux/regulator/arizona-ldo1.h>
@@ -198,16 +197,6 @@ static int arizona_ldo1_of_get_pdata(struct arizona_ldo1_pdata *pdata,
 	struct device_node *init_node, *dcvdd_node;
 	struct regulator_init_data *init_data;
 
-	pdata->ldoena = of_get_named_gpio(np, "wlf,ldoena", 0);
-	if (pdata->ldoena < 0) {
-		dev_warn(config->dev,
-			 "LDOENA GPIO property missing/malformed: %d\n",
-			 pdata->ldoena);
-		pdata->ldoena = 0;
-	} else {
-		config->ena_gpio_initialized = true;
-	}
-
 	init_node = of_get_child_by_name(np, "ldo1");
 	dcvdd_node = of_parse_phandle(np, "DCVDD-supply", 0);
 
@@ -264,7 +253,11 @@ static int arizona_ldo1_common_init(struct platform_device *pdev,
 		}
 	}
 
-	config.ena_gpio = pdata->ldoena;
+	/* We assume that high output = regulator off */
+	config.ena_gpiod = devm_gpiod_get_optional(&pdev->dev, "wlf,ldoena",
+						   GPIOD_OUT_HIGH);
+	if (IS_ERR(config.ena_gpiod))
+		return PTR_ERR(config.ena_gpiod);
 
 	if (pdata->init_data)
 		config.init_data = pdata->init_data;
diff --git a/include/linux/regulator/arizona-ldo1.h b/include/linux/regulator/arizona-ldo1.h
index c685f1277c63..fe74ab9990e6 100644
--- a/include/linux/regulator/arizona-ldo1.h
+++ b/include/linux/regulator/arizona-ldo1.h
@@ -14,9 +14,6 @@
 struct regulator_init_data;
 
 struct arizona_ldo1_pdata {
-	/** GPIO controlling LDOENA, if any */
-	int ldoena;
-
 	/** Regulator configuration for LDO1 */
 	const struct regulator_init_data *init_data;
 };
-- 
2.14.3

^ permalink raw reply	[flat|nested] 54+ messages in thread

* [PATCH 06/21] regulator: da9211: Pass descriptors instead of GPIO numbers
  2018-02-12 13:16 [PATCH 00/21] regulator: switch core to GPIO descriptors Linus Walleij
                   ` (4 preceding siblings ...)
  2018-02-12 13:17 ` [PATCH 05/21] regulator: arizona-ldo1: Look up a descriptor and pass to the core Linus Walleij
@ 2018-02-12 13:17 ` Linus Walleij
  2018-02-16 17:12   ` Applied "regulator: da9211: Pass descriptors instead of GPIO numbers" to the regulator tree Mark Brown
  2018-02-12 13:17 ` [PATCH 07/21] regulator: max8973: Pass descriptor instead of GPIO number Linus Walleij
                   ` (14 subsequent siblings)
  20 siblings, 1 reply; 54+ messages in thread
From: Linus Walleij @ 2018-02-12 13:17 UTC (permalink / raw)
  To: Liam Girdwood, Mark Brown; +Cc: linux-kernel, linux-gpio, Linus Walleij

This augments the DA9211 regulator driver to fetch its GPIO descriptors
directly from the device tree using the newly exported
devm_get_gpiod_from_child().

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
 drivers/regulator/da9211-regulator.c | 23 +++++++++++------------
 include/linux/regulator/da9211.h     |  4 +++-
 2 files changed, 14 insertions(+), 13 deletions(-)

diff --git a/drivers/regulator/da9211-regulator.c b/drivers/regulator/da9211-regulator.c
index 9b8f47617724..6c122b3df5d0 100644
--- a/drivers/regulator/da9211-regulator.c
+++ b/drivers/regulator/da9211-regulator.c
@@ -15,7 +15,6 @@
  */
 
 #include <linux/err.h>
-#include <linux/gpio.h>
 #include <linux/i2c.h>
 #include <linux/module.h>
 #include <linux/init.h>
@@ -25,7 +24,7 @@
 #include <linux/regmap.h>
 #include <linux/irq.h>
 #include <linux/interrupt.h>
-#include <linux/of_gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/regulator/of_regulator.h>
 #include <linux/regulator/da9211.h>
 #include "da9211-regulator.h"
@@ -294,9 +293,12 @@ static struct da9211_pdata *da9211_parse_regulators_dt(
 
 		pdata->init_data[n] = da9211_matches[i].init_data;
 		pdata->reg_node[n] = da9211_matches[i].of_node;
-		pdata->gpio_ren[n] =
-			of_get_named_gpio(da9211_matches[i].of_node,
-				"enable-gpios", 0);
+		pdata->gpiod_ren[n] = devm_gpiod_get_from_of_node(dev,
+								  da9211_matches[i].of_node,
+								  "enable",
+								  0,
+								  GPIOD_OUT_HIGH,
+								  "da9211-enable");
 		n++;
 	}
 
@@ -382,13 +384,10 @@ static int da9211_regulator_init(struct da9211 *chip)
 		config.regmap = chip->regmap;
 		config.of_node = chip->pdata->reg_node[i];
 
-		if (gpio_is_valid(chip->pdata->gpio_ren[i])) {
-			config.ena_gpio = chip->pdata->gpio_ren[i];
-			config.ena_gpio_initialized = true;
-		} else {
-			config.ena_gpio = -EINVAL;
-			config.ena_gpio_initialized = false;
-		}
+		if (chip->pdata->gpiod_ren[i])
+			config.ena_gpiod = chip->pdata->gpiod_ren[i];
+		else
+			config.ena_gpiod = NULL;
 
 		chip->rdev[i] = devm_regulator_register(chip->dev,
 			&da9211_regulators[i], &config);
diff --git a/include/linux/regulator/da9211.h b/include/linux/regulator/da9211.h
index f2fd2d3bf58f..d1f2073e4d5f 100644
--- a/include/linux/regulator/da9211.h
+++ b/include/linux/regulator/da9211.h
@@ -21,6 +21,8 @@
 
 #define DA9211_MAX_REGULATORS	2
 
+struct gpio_desc;
+
 enum da9211_chip_id {
 	DA9211,
 	DA9212,
@@ -39,7 +41,7 @@ struct da9211_pdata {
 	 * 2 : 2 phase 2 buck
 	 */
 	int num_buck;
-	int gpio_ren[DA9211_MAX_REGULATORS];
+	struct gpio_desc *gpiod_ren[DA9211_MAX_REGULATORS];
 	struct device_node *reg_node[DA9211_MAX_REGULATORS];
 	struct regulator_init_data *init_data[DA9211_MAX_REGULATORS];
 };
-- 
2.14.3

^ permalink raw reply	[flat|nested] 54+ messages in thread

* [PATCH 07/21] regulator: max8973: Pass descriptor instead of GPIO number
  2018-02-12 13:16 [PATCH 00/21] regulator: switch core to GPIO descriptors Linus Walleij
                   ` (5 preceding siblings ...)
  2018-02-12 13:17 ` [PATCH 06/21] regulator: da9211: Pass descriptors instead of GPIO numbers Linus Walleij
@ 2018-02-12 13:17 ` Linus Walleij
  2018-05-24 19:14   ` Applied "regulator: max8973: Pass descriptor instead of GPIO number" to the regulator tree Mark Brown
  2018-02-12 13:17 ` [PATCH 08/21] regulator: max77686: Pass descriptor instead of GPIO number Linus Walleij
                   ` (13 subsequent siblings)
  20 siblings, 1 reply; 54+ messages in thread
From: Linus Walleij @ 2018-02-12 13:17 UTC (permalink / raw)
  To: Liam Girdwood, Mark Brown
  Cc: linux-kernel, linux-gpio, Linus Walleij, Mikko Perttunen,
	Laxman Dewangan

Instead of passing a global GPIO number, pass a descriptor looked
up with the standard devm_gpiod_get_optional() call.

Cc: Mikko Perttunen <mperttunen@nvidia.com>
Cc: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
 drivers/regulator/max8973-regulator.c | 54 +++++++++++++++++++----------------
 1 file changed, 29 insertions(+), 25 deletions(-)

diff --git a/drivers/regulator/max8973-regulator.c b/drivers/regulator/max8973-regulator.c
index e0c747aa9f85..7cd493ec6315 100644
--- a/drivers/regulator/max8973-regulator.c
+++ b/drivers/regulator/max8973-regulator.c
@@ -34,6 +34,7 @@
 #include <linux/regulator/max8973-regulator.h>
 #include <linux/regulator/of_regulator.h>
 #include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/of_gpio.h>
 #include <linux/i2c.h>
 #include <linux/slab.h>
@@ -114,7 +115,6 @@ struct max8973_chip {
 	struct regulator_desc desc;
 	struct regmap *regmap;
 	bool enable_external_control;
-	int enable_gpio;
 	int dvs_gpio;
 	int lru_index[MAX8973_MAX_VOUT_REG];
 	int curr_vout_val[MAX8973_MAX_VOUT_REG];
@@ -567,7 +567,6 @@ static struct max8973_regulator_platform_data *max8973_parse_dt(
 
 	pdata->enable_ext_control = of_property_read_bool(np,
 						"maxim,externally-enable");
-	pdata->enable_gpio = of_get_named_gpio(np, "maxim,enable-gpio", 0);
 	pdata->dvs_gpio = of_get_named_gpio(np, "maxim,dvs-gpio", 0);
 
 	ret = of_property_read_u32(np, "maxim,dvs-default-state", &pval);
@@ -633,6 +632,8 @@ static int max8973_probe(struct i2c_client *client,
 	struct max8973_chip *max;
 	bool pdata_from_dt = false;
 	unsigned int chip_id;
+	struct gpio_desc *gpiod;
+	enum gpiod_flags gflags;
 	int ret;
 
 	pdata = dev_get_platdata(&client->dev);
@@ -647,8 +648,7 @@ static int max8973_probe(struct i2c_client *client,
 		return -EIO;
 	}
 
-	if ((pdata->dvs_gpio == -EPROBE_DEFER) ||
-		(pdata->enable_gpio == -EPROBE_DEFER))
+	if (pdata->dvs_gpio == -EPROBE_DEFER)
 		return -EPROBE_DEFER;
 
 	max = devm_kzalloc(&client->dev, sizeof(*max), GFP_KERNEL);
@@ -696,15 +696,11 @@ static int max8973_probe(struct i2c_client *client,
 	max->desc.n_voltages = MAX8973_BUCK_N_VOLTAGE;
 
 	max->dvs_gpio = (pdata->dvs_gpio) ? pdata->dvs_gpio : -EINVAL;
-	max->enable_gpio = (pdata->enable_gpio) ? pdata->enable_gpio : -EINVAL;
 	max->enable_external_control = pdata->enable_ext_control;
 	max->curr_gpio_val = pdata->dvs_def_state;
 	max->curr_vout_reg = MAX8973_VOUT + pdata->dvs_def_state;
 	max->junction_temp_warning = pdata->junction_temp_warning;
 
-	if (gpio_is_valid(max->enable_gpio))
-		max->enable_external_control = true;
-
 	max->lru_index[0] = max->curr_vout_reg;
 
 	if (gpio_is_valid(max->dvs_gpio)) {
@@ -757,27 +753,35 @@ static int max8973_probe(struct i2c_client *client,
 			break;
 		}
 
-		if (gpio_is_valid(max->enable_gpio)) {
-			config.ena_gpio_flags = GPIOF_OUT_INIT_LOW;
-			if (ridata && (ridata->constraints.always_on ||
-					ridata->constraints.boot_on))
-				config.ena_gpio_flags = GPIOF_OUT_INIT_HIGH;
-			config.ena_gpio = max->enable_gpio;
+		if (ridata && (ridata->constraints.always_on ||
+			       ridata->constraints.boot_on))
+			gflags = GPIOD_OUT_HIGH;
+		else
+			gflags = GPIOD_OUT_LOW;
+		gpiod = devm_gpiod_get_optional(&client->dev,
+						"maxim,enable",
+						gflags);
+		if (IS_ERR(gpiod))
+			return PTR_ERR(gpiod);
+		if (gpiod) {
+			config.ena_gpiod = gpiod;
+			max->enable_external_control = true;
 		}
+
 		break;
 
 	case MAX77621:
-		if (gpio_is_valid(max->enable_gpio)) {
-			ret = devm_gpio_request_one(&client->dev,
-					max->enable_gpio, GPIOF_OUT_INIT_HIGH,
-					"max8973-en-gpio");
-			if (ret) {
-				dev_err(&client->dev,
-					"gpio_request for gpio %d failed: %d\n",
-					max->enable_gpio, ret);
-				return ret;
-			}
-		}
+		/*
+		 * We do not let the core switch this regulator on/off,
+		 * we just leave it on.
+		 */
+		gpiod = devm_gpiod_get_optional(&client->dev,
+						"maxim,enable",
+						GPIOD_OUT_HIGH);
+		if (IS_ERR(gpiod))
+			return PTR_ERR(gpiod);
+		if (gpiod)
+			max->enable_external_control = true;
 
 		max->desc.enable_reg = MAX8973_VOUT;
 		max->desc.enable_mask = MAX8973_VOUT_ENABLE;
-- 
2.14.3

^ permalink raw reply	[flat|nested] 54+ messages in thread

* [PATCH 08/21] regulator: max77686: Pass descriptor instead of GPIO number
  2018-02-12 13:16 [PATCH 00/21] regulator: switch core to GPIO descriptors Linus Walleij
                   ` (6 preceding siblings ...)
  2018-02-12 13:17 ` [PATCH 07/21] regulator: max8973: Pass descriptor instead of GPIO number Linus Walleij
@ 2018-02-12 13:17 ` Linus Walleij
  2018-02-12 13:37   ` Krzysztof Kozlowski
  2018-02-12 13:17 ` [PATCH 09/21] regulator: lm363x: " Linus Walleij
                   ` (12 subsequent siblings)
  20 siblings, 1 reply; 54+ messages in thread
From: Linus Walleij @ 2018-02-12 13:17 UTC (permalink / raw)
  To: Liam Girdwood, Mark Brown
  Cc: linux-kernel, linux-gpio, Linus Walleij, Chanwoo Choi,
	Krzysztof Kozlowski, Bartlomiej Zolnierkiewicz

Instead of passing a global GPIO number, pass a descriptor looked
up from the device tree configuration node.

Cc: Chanwoo Choi <cw00.choi@samsung.com>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
 drivers/regulator/max77686-regulator.c | 19 ++++++++++++-------
 1 file changed, 12 insertions(+), 7 deletions(-)

diff --git a/drivers/regulator/max77686-regulator.c b/drivers/regulator/max77686-regulator.c
index c301f3733475..5ebd06f47e6a 100644
--- a/drivers/regulator/max77686-regulator.c
+++ b/drivers/regulator/max77686-regulator.c
@@ -25,8 +25,7 @@
 #include <linux/kernel.h>
 #include <linux/bug.h>
 #include <linux/err.h>
-#include <linux/gpio.h>
-#include <linux/of_gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/slab.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/driver.h>
@@ -90,6 +89,7 @@ enum max77686_ramp_rate {
 };
 
 struct max77686_data {
+	struct device *dev;
 	DECLARE_BITMAP(gpio_enabled, MAX77686_REGULATORS);
 
 	/* Array indexed by regulator id */
@@ -269,16 +269,20 @@ static int max77686_of_parse_cb(struct device_node *np,
 	case MAX77686_BUCK8:
 	case MAX77686_BUCK9:
 	case MAX77686_LDO20 ... MAX77686_LDO22:
-		config->ena_gpio = of_get_named_gpio(np,
-					"maxim,ena-gpios", 0);
-		config->ena_gpio_flags = GPIOF_OUT_INIT_HIGH;
-		config->ena_gpio_initialized = true;
+		config->ena_gpiod = devm_gpiod_get_from_of_node(max77686->dev,
+								np,
+								"maxim,ena",
+								0,
+								GPIOD_OUT_HIGH,
+								"max77686-LDO");
+		if (IS_ERR(config->ena_gpiod))
+			return PTR_ERR(config->ena_gpiod);
 		break;
 	default:
 		return 0;
 	}
 
-	if (gpio_is_valid(config->ena_gpio)) {
+	if (config->ena_gpiod) {
 		set_bit(desc->id, max77686->gpio_enabled);
 
 		return regmap_update_bits(config->regmap, desc->enable_reg,
@@ -521,6 +525,7 @@ static int max77686_pmic_probe(struct platform_device *pdev)
 	if (!max77686)
 		return -ENOMEM;
 
+	max77686->dev = &pdev->dev;
 	config.dev = iodev->dev;
 	config.regmap = iodev->regmap;
 	config.driver_data = max77686;
-- 
2.14.3

^ permalink raw reply	[flat|nested] 54+ messages in thread

* [PATCH 09/21] regulator: lm363x: Pass descriptor instead of GPIO number
  2018-02-12 13:16 [PATCH 00/21] regulator: switch core to GPIO descriptors Linus Walleij
                   ` (7 preceding siblings ...)
  2018-02-12 13:17 ` [PATCH 08/21] regulator: max77686: Pass descriptor instead of GPIO number Linus Walleij
@ 2018-02-12 13:17 ` Linus Walleij
  2018-05-24 19:14   ` Applied "regulator: lm363x: Pass descriptor instead of GPIO number" to the regulator tree Mark Brown
  2018-02-12 13:17 ` [PATCH 10/21] regulator: lp8788-ldo: Pass descriptor instead of GPIO number Linus Walleij
                   ` (11 subsequent siblings)
  20 siblings, 1 reply; 54+ messages in thread
From: Linus Walleij @ 2018-02-12 13:17 UTC (permalink / raw)
  To: Liam Girdwood, Mark Brown
  Cc: linux-kernel, linux-gpio, Linus Walleij, Milo Kim

Instead of passing a global GPIO number, pass a descriptor looked
up with the standard devm_gpiod_get_index_optional() call.

Cc: Milo Kim <milo.kim@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
 drivers/regulator/lm363x-regulator.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/drivers/regulator/lm363x-regulator.c b/drivers/regulator/lm363x-regulator.c
index ce5f7d9ad475..b615a413ca9f 100644
--- a/drivers/regulator/lm363x-regulator.c
+++ b/drivers/regulator/lm363x-regulator.c
@@ -16,7 +16,7 @@
 #include <linux/mfd/ti-lmu-register.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/of_gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/driver.h>
 #include <linux/regulator/of_regulator.h>
@@ -219,7 +219,7 @@ static const struct regulator_desc lm363x_regulator_desc[] = {
 	},
 };
 
-static int lm363x_regulator_of_get_enable_gpio(struct device_node *np, int id)
+static struct gpio_desc *lm363x_regulator_of_get_enable_gpio(struct device *dev, int id)
 {
 	/*
 	 * Check LCM_EN1/2_GPIO is configured.
@@ -227,11 +227,11 @@ static int lm363x_regulator_of_get_enable_gpio(struct device_node *np, int id)
 	 */
 	switch (id) {
 	case LM3632_LDO_POS:
-		return of_get_named_gpio(np, "enable-gpios", 0);
+		return devm_gpiod_get_index_optional(dev, "enable", 0, GPIOD_OUT_LOW);
 	case LM3632_LDO_NEG:
-		return of_get_named_gpio(np, "enable-gpios", 1);
+		return devm_gpiod_get_index_optional(dev, "enable", 1, GPIOD_OUT_LOW);
 	default:
-		return -EINVAL;
+		return NULL;
 	}
 }
 
@@ -243,7 +243,8 @@ static int lm363x_regulator_probe(struct platform_device *pdev)
 	struct regulator_dev *rdev;
 	struct device *dev = &pdev->dev;
 	int id = pdev->id;
-	int ret, ena_gpio;
+	struct gpio_desc *gpiod;
+	int ret;
 
 	cfg.dev = dev;
 	cfg.regmap = regmap;
@@ -252,10 +253,9 @@ static int lm363x_regulator_probe(struct platform_device *pdev)
 	 * LM3632 LDOs can be controlled by external pin.
 	 * Register update is required if the pin is used.
 	 */
-	ena_gpio = lm363x_regulator_of_get_enable_gpio(dev->of_node, id);
-	if (gpio_is_valid(ena_gpio)) {
-		cfg.ena_gpio = ena_gpio;
-		cfg.ena_gpio_flags = GPIOF_OUT_INIT_LOW;
+	gpiod = lm363x_regulator_of_get_enable_gpio(dev, id);
+	if (gpiod) {
+		cfg.ena_gpiod = gpiod;
 
 		ret = regmap_update_bits(regmap, LM3632_REG_BIAS_CONFIG,
 					 LM3632_EXT_EN_MASK,
-- 
2.14.3

^ permalink raw reply	[flat|nested] 54+ messages in thread

* [PATCH 10/21] regulator: lp8788-ldo: Pass descriptor instead of GPIO number
  2018-02-12 13:16 [PATCH 00/21] regulator: switch core to GPIO descriptors Linus Walleij
                   ` (8 preceding siblings ...)
  2018-02-12 13:17 ` [PATCH 09/21] regulator: lm363x: " Linus Walleij
@ 2018-02-12 13:17 ` Linus Walleij
  2018-02-12 14:59   ` Lee Jones
  2018-05-24 19:14   ` Applied "regulator: lp8788-ldo: Pass descriptor instead of GPIO number" to the regulator tree Mark Brown
  2018-02-12 13:17 ` [PATCH 11/21] regulator: max8952: Pass descriptor instead of GPIO number Linus Walleij
                   ` (10 subsequent siblings)
  20 siblings, 2 replies; 54+ messages in thread
From: Linus Walleij @ 2018-02-12 13:17 UTC (permalink / raw)
  To: Liam Girdwood, Mark Brown
  Cc: linux-kernel, linux-gpio, Linus Walleij, Milo Kim, Lee Jones

Instead of passing a global GPIO number, pass a descriptor looked
up with the standard devm_gpiod_get_index_optional() call.

This driver has supported passing a LDO enable GPIO for years,
yet this facility has never been put to use in the upstream kernel.
If someone desires to put in place GPIO control for the LDOs,
this can be done by adding a GPIO descriptor table in the MFD
nexus in drivers/mfd/lp8788.c for the LDO device when spawning the
MFD children, or using a board file.

Cc: Milo Kim <milo.kim@ti.com>
Cc: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
Lee: would be nice if you could ACK this smallish patch to
the MFD header.
---
 drivers/regulator/lp8788-ldo.c | 32 ++++++++++++++++----------------
 include/linux/mfd/lp8788.h     | 16 ----------------
 2 files changed, 16 insertions(+), 32 deletions(-)

diff --git a/drivers/regulator/lp8788-ldo.c b/drivers/regulator/lp8788-ldo.c
index cbfd35873575..f2347474a106 100644
--- a/drivers/regulator/lp8788-ldo.c
+++ b/drivers/regulator/lp8788-ldo.c
@@ -16,7 +16,7 @@
 #include <linux/err.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/driver.h>
-#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/mfd/lp8788.h>
 
 /* register address */
@@ -85,8 +85,6 @@
 #define LP8788_STARTUP_TIME_S		3
 
 #define ENABLE_TIME_USEC		32
-#define ENABLE				GPIOF_OUT_INIT_HIGH
-#define DISABLE				GPIOF_OUT_INIT_LOW
 
 enum lp8788_ldo_id {
 	DLDO1,
@@ -117,7 +115,7 @@ struct lp8788_ldo {
 	struct lp8788 *lp;
 	struct regulator_desc *desc;
 	struct regulator_dev *regulator;
-	struct lp8788_ldo_enable_pin *en_pin;
+	struct gpio_desc *ena_gpiod;
 };
 
 /* DLDO 1, 2, 3, 9 voltage table */
@@ -469,7 +467,6 @@ static int lp8788_config_ldo_enable_mode(struct platform_device *pdev,
 					enum lp8788_ldo_id id)
 {
 	struct lp8788 *lp = ldo->lp;
-	struct lp8788_platform_data *pdata = lp->pdata;
 	enum lp8788_ext_ldo_en_id enable_id;
 	u8 en_mask[] = {
 		[EN_ALDO1]   = LP8788_EN_SEL_ALDO1_M,
@@ -504,11 +501,18 @@ static int lp8788_config_ldo_enable_mode(struct platform_device *pdev,
 		return 0;
 	}
 
-	/* if no platform data for ldo pin, then set default enable mode */
-	if (!pdata || !pdata->ldo_pin || !pdata->ldo_pin[enable_id])
+	/* FIXME: check default mode for GPIO here: high or low? */
+	ldo->ena_gpiod = devm_gpiod_get_index_optional(&pdev->dev,
+						       "enable",
+						       enable_id,
+						       GPIOD_OUT_HIGH);
+	if (IS_ERR(ldo->ena_gpiod))
+		return PTR_ERR(ldo->ena_gpiod);
+
+	/* if no GPIO for ldo pin, then set default enable mode */
+	if (!ldo->ena_gpiod)
 		goto set_default_ldo_enable_mode;
 
-	ldo->en_pin = pdata->ldo_pin[enable_id];
 	return 0;
 
 set_default_ldo_enable_mode:
@@ -533,10 +537,8 @@ static int lp8788_dldo_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	if (ldo->en_pin) {
-		cfg.ena_gpio = ldo->en_pin->gpio;
-		cfg.ena_gpio_flags = ldo->en_pin->init_state;
-	}
+	if (ldo->ena_gpiod)
+		cfg.ena_gpiod = ldo->ena_gpiod;
 
 	cfg.dev = pdev->dev.parent;
 	cfg.init_data = lp->pdata ? lp->pdata->dldo_data[id] : NULL;
@@ -582,10 +584,8 @@ static int lp8788_aldo_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	if (ldo->en_pin) {
-		cfg.ena_gpio = ldo->en_pin->gpio;
-		cfg.ena_gpio_flags = ldo->en_pin->init_state;
-	}
+	if (ldo->ena_gpiod)
+		cfg.ena_gpiod = ldo->ena_gpiod;
 
 	cfg.dev = pdev->dev.parent;
 	cfg.init_data = lp->pdata ? lp->pdata->aldo_data[id] : NULL;
diff --git a/include/linux/mfd/lp8788.h b/include/linux/mfd/lp8788.h
index 786bf6679a28..2010e0de3e34 100644
--- a/include/linux/mfd/lp8788.h
+++ b/include/linux/mfd/lp8788.h
@@ -181,20 +181,6 @@ struct lp8788_buck2_dvs {
 	enum lp8788_dvs_sel vsel;
 };
 
-/*
- * struct lp8788_ldo_enable_pin
- *
- *   Basically, all LDOs are enabled through the I2C commands.
- *   But ALDO 1 ~ 5, 7, DLDO 7, 9, 11 can be enabled by external gpio pins.
- *
- * @gpio         : gpio number which is used for enabling ldos
- * @init_state   : initial gpio state (ex. GPIOF_OUT_INIT_LOW)
- */
-struct lp8788_ldo_enable_pin {
-	int gpio;
-	int init_state;
-};
-
 /*
  * struct lp8788_chg_param
  * @addr         : charging control register address (range : 0x11 ~ 0x1C)
@@ -288,7 +274,6 @@ struct lp8788_vib_platform_data {
  * @aldo_data    : regulator initial data for analog ldo
  * @buck1_dvs    : gpio configurations for buck1 dvs
  * @buck2_dvs    : gpio configurations for buck2 dvs
- * @ldo_pin      : gpio configurations for enabling LDOs
  * @chg_pdata    : platform data for charger driver
  * @alarm_sel    : rtc alarm selection (1 or 2)
  * @bl_pdata     : configurable data for backlight driver
@@ -306,7 +291,6 @@ struct lp8788_platform_data {
 	struct regulator_init_data *aldo_data[LP8788_NUM_ALDOS];
 	struct lp8788_buck1_dvs *buck1_dvs;
 	struct lp8788_buck2_dvs *buck2_dvs;
-	struct lp8788_ldo_enable_pin *ldo_pin[EN_LDOS_MAX];
 
 	/* charger */
 	struct lp8788_charger_platform_data *chg_pdata;
-- 
2.14.3

^ permalink raw reply	[flat|nested] 54+ messages in thread

* [PATCH 11/21] regulator: max8952: Pass descriptor instead of GPIO number
  2018-02-12 13:16 [PATCH 00/21] regulator: switch core to GPIO descriptors Linus Walleij
                   ` (9 preceding siblings ...)
  2018-02-12 13:17 ` [PATCH 10/21] regulator: lp8788-ldo: Pass descriptor instead of GPIO number Linus Walleij
@ 2018-02-12 13:17 ` Linus Walleij
  2018-05-24 19:14   ` Applied "regulator: max8952: Pass descriptor instead of GPIO number" to the regulator tree Mark Brown
  2018-02-12 13:17 ` [PATCH 12/21] regulator: pfuze100: Delete reference to ena_gpio Linus Walleij
                   ` (9 subsequent siblings)
  20 siblings, 1 reply; 54+ messages in thread
From: Linus Walleij @ 2018-02-12 13:17 UTC (permalink / raw)
  To: Liam Girdwood, Mark Brown
  Cc: linux-kernel, linux-gpio, Linus Walleij, MyungJoo Ham

Instead of passing a global GPIO number for the enable GPIO, pass
a descriptor looked up with the standard devm_gpiod_get_optional()
call.

All users of this regulator use device tree so the transition is
pretty smooth.

Cc: MyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
 drivers/regulator/max8952.c       | 18 +++++++++++++-----
 include/linux/regulator/max8952.h |  1 -
 2 files changed, 13 insertions(+), 6 deletions(-)

diff --git a/drivers/regulator/max8952.c b/drivers/regulator/max8952.c
index 1096546c05e9..f1e77ed5dfec 100644
--- a/drivers/regulator/max8952.c
+++ b/drivers/regulator/max8952.c
@@ -27,6 +27,7 @@
 #include <linux/regulator/driver.h>
 #include <linux/regulator/max8952.h>
 #include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/io.h>
 #include <linux/of.h>
 #include <linux/of_gpio.h>
@@ -148,7 +149,6 @@ static struct max8952_platform_data *max8952_parse_dt(struct device *dev)
 
 	pd->gpio_vid0 = of_get_named_gpio(np, "max8952,vid-gpios", 0);
 	pd->gpio_vid1 = of_get_named_gpio(np, "max8952,vid-gpios", 1);
-	pd->gpio_en = of_get_named_gpio(np, "max8952,en-gpio", 0);
 
 	if (of_property_read_u32(np, "max8952,default-mode", &pd->default_mode))
 		dev_warn(dev, "Default mode not specified, assuming 0\n");
@@ -197,6 +197,8 @@ static int max8952_pmic_probe(struct i2c_client *client,
 	struct regulator_config config = { };
 	struct max8952_data *max8952;
 	struct regulator_dev *rdev;
+	struct gpio_desc *gpiod;
+	enum gpiod_flags gflags;
 
 	int ret = 0, err = 0;
 
@@ -224,11 +226,17 @@ static int max8952_pmic_probe(struct i2c_client *client,
 	config.driver_data = max8952;
 	config.of_node = client->dev.of_node;
 
-	config.ena_gpio = pdata->gpio_en;
-	if (client->dev.of_node)
-		config.ena_gpio_initialized = true;
 	if (pdata->reg_data->constraints.boot_on)
-		config.ena_gpio_flags |= GPIOF_OUT_INIT_HIGH;
+		gflags = GPIOD_OUT_HIGH;
+	else
+		gflags = GPIOD_OUT_LOW;
+	gpiod = devm_gpiod_get_optional(&client->dev,
+					"max8952,en",
+					gflags);
+	if (IS_ERR(gpiod))
+		return PTR_ERR(gpiod);
+	if (gpiod)
+		config.ena_gpiod = gpiod;
 
 	rdev = devm_regulator_register(&client->dev, &regulator, &config);
 	if (IS_ERR(rdev)) {
diff --git a/include/linux/regulator/max8952.h b/include/linux/regulator/max8952.h
index 4dbb63a1d4ab..686c42c041b5 100644
--- a/include/linux/regulator/max8952.h
+++ b/include/linux/regulator/max8952.h
@@ -120,7 +120,6 @@ enum {
 struct max8952_platform_data {
 	int gpio_vid0;
 	int gpio_vid1;
-	int gpio_en;
 
 	u32 default_mode;
 	u32 dvs_mode[MAX8952_NUM_DVS_MODE]; /* MAX8952_DVS_MODEx_XXXXmV */
-- 
2.14.3

^ permalink raw reply	[flat|nested] 54+ messages in thread

* [PATCH 12/21] regulator: pfuze100: Delete reference to ena_gpio
  2018-02-12 13:16 [PATCH 00/21] regulator: switch core to GPIO descriptors Linus Walleij
                   ` (10 preceding siblings ...)
  2018-02-12 13:17 ` [PATCH 11/21] regulator: max8952: Pass descriptor instead of GPIO number Linus Walleij
@ 2018-02-12 13:17 ` Linus Walleij
  2018-05-24 19:14   ` Applied "regulator: pfuze100: Delete reference to ena_gpio" to the regulator tree Mark Brown
  2018-02-12 13:17 ` [PATCH 13/21] regulator: s2mps11: Pass descriptor instead of GPIO number Linus Walleij
                   ` (8 subsequent siblings)
  20 siblings, 1 reply; 54+ messages in thread
From: Linus Walleij @ 2018-02-12 13:17 UTC (permalink / raw)
  To: Liam Girdwood, Mark Brown; +Cc: linux-kernel, linux-gpio, Linus Walleij

We now pass a GPIO descriptor to the core instead of a global
GPIO number, if this descriptor is NULL the GPIO line is not
used. Just delete the assignment of an invalid GPIO line.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
 drivers/regulator/pfuze100-regulator.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/regulator/pfuze100-regulator.c b/drivers/regulator/pfuze100-regulator.c
index 63922a2167e5..f341d9614a77 100644
--- a/drivers/regulator/pfuze100-regulator.c
+++ b/drivers/regulator/pfuze100-regulator.c
@@ -648,7 +648,6 @@ static int pfuze100_regulator_probe(struct i2c_client *client,
 		config.init_data = init_data;
 		config.driver_data = pfuze_chip;
 		config.of_node = match_of_node(i);
-		config.ena_gpio = -EINVAL;
 
 		pfuze_chip->regulators[i] =
 			devm_regulator_register(&client->dev, desc, &config);
-- 
2.14.3

^ permalink raw reply	[flat|nested] 54+ messages in thread

* [PATCH 13/21] regulator: s2mps11: Pass descriptor instead of GPIO number
  2018-02-12 13:16 [PATCH 00/21] regulator: switch core to GPIO descriptors Linus Walleij
                   ` (11 preceding siblings ...)
  2018-02-12 13:17 ` [PATCH 12/21] regulator: pfuze100: Delete reference to ena_gpio Linus Walleij
@ 2018-02-12 13:17 ` Linus Walleij
  2018-05-17 16:41   ` Applied "regulator: s2mps11: Pass descriptor instead of GPIO number" to the regulator tree Mark Brown
  2018-02-12 13:17 ` [PATCH 14/21] regulator: s5m8767: Pass descriptor instead of GPIO number Linus Walleij
                   ` (7 subsequent siblings)
  20 siblings, 1 reply; 54+ messages in thread
From: Linus Walleij @ 2018-02-12 13:17 UTC (permalink / raw)
  To: Liam Girdwood, Mark Brown
  Cc: linux-kernel, linux-gpio, Linus Walleij, Krzysztof Kozlowski,
	Sangbeom Kim, Chanwoo Choi

Instead of passing a global GPIO number for the enable GPIO, pass
a descriptor looked up with the standard devm_gpiod_get_optional()
call.

This regulator supports passing platform data, but enable/sleep
regulators are looked up from the device tree exclusively, so
we can need not touch other files.

Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Sangbeom Kim <sbkim73@samsung.com>
Cc: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
 drivers/regulator/s2mps11.c | 46 ++++++++++++++++++++++-----------------------
 1 file changed, 23 insertions(+), 23 deletions(-)

diff --git a/drivers/regulator/s2mps11.c b/drivers/regulator/s2mps11.c
index 7726b874e539..9a1dca26362e 100644
--- a/drivers/regulator/s2mps11.c
+++ b/drivers/regulator/s2mps11.c
@@ -18,7 +18,7 @@
 
 #include <linux/bug.h>
 #include <linux/err.h>
-#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/of.h>
@@ -27,7 +27,6 @@
 #include <linux/regulator/driver.h>
 #include <linux/regulator/machine.h>
 #include <linux/regulator/of_regulator.h>
-#include <linux/of_gpio.h>
 #include <linux/mfd/samsung/core.h>
 #include <linux/mfd/samsung/s2mps11.h>
 #include <linux/mfd/samsung/s2mps13.h>
@@ -57,7 +56,7 @@ struct s2mps11_info {
 	 * Array (size: number of regulators) with GPIO-s for external
 	 * sleep control.
 	 */
-	int *ext_control_gpio;
+	struct gpio_desc **ext_control_gpiod;
 };
 
 static int get_ramp_delay(int ramp_delay)
@@ -524,7 +523,7 @@ static int s2mps14_regulator_enable(struct regulator_dev *rdev)
 	case S2MPS14X:
 		if (test_bit(rdev_get_id(rdev), s2mps11->suspend_state))
 			val = S2MPS14_ENABLE_SUSPEND;
-		else if (gpio_is_valid(s2mps11->ext_control_gpio[rdev_get_id(rdev)]))
+		else if (s2mps11->ext_control_gpiod[rdev_get_id(rdev)])
 			val = S2MPS14_ENABLE_EXT_CONTROL;
 		else
 			val = rdev->desc->enable_mask;
@@ -818,7 +817,7 @@ static int s2mps14_pmic_enable_ext_control(struct s2mps11_info *s2mps11,
 static void s2mps14_pmic_dt_parse_ext_control_gpio(struct platform_device *pdev,
 		struct of_regulator_match *rdata, struct s2mps11_info *s2mps11)
 {
-	int *gpio = s2mps11->ext_control_gpio;
+	struct gpio_desc **gpio = s2mps11->ext_control_gpiod;
 	unsigned int i;
 	unsigned int valid_regulators[3] = { S2MPS14_LDO10, S2MPS14_LDO11,
 		S2MPS14_LDO12 };
@@ -829,11 +828,20 @@ static void s2mps14_pmic_dt_parse_ext_control_gpio(struct platform_device *pdev,
 		if (!rdata[reg].init_data || !rdata[reg].of_node)
 			continue;
 
-		gpio[reg] = of_get_named_gpio(rdata[reg].of_node,
-				"samsung,ext-control-gpios", 0);
-		if (gpio_is_valid(gpio[reg]))
-			dev_dbg(&pdev->dev, "Using GPIO %d for ext-control over %d/%s\n",
-					gpio[reg], reg, rdata[reg].name);
+		gpio[reg] = devm_gpiod_get_from_of_node(&pdev->dev,
+							rdata[reg].of_node,
+							"samsung,ext-control-gpios",
+							0,
+							GPIOD_OUT_HIGH,
+							"s2mps11-LDO");
+		if (IS_ERR(gpio[reg])) {
+			dev_err(&pdev->dev, "Failed to get control GPIO for %d/%s\n",
+				reg, rdata[reg].name);
+			continue;
+		}
+		if (gpio[reg])
+			dev_dbg(&pdev->dev, "Using GPIO for ext-control over %d/%s\n",
+				reg, rdata[reg].name);
 	}
 }
 
@@ -1139,17 +1147,11 @@ static int s2mps11_pmic_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	s2mps11->ext_control_gpio = devm_kmalloc(&pdev->dev,
-			sizeof(*s2mps11->ext_control_gpio) * rdev_num,
+	s2mps11->ext_control_gpiod = devm_kmalloc(&pdev->dev,
+			sizeof(*s2mps11->ext_control_gpiod) * rdev_num,
 			GFP_KERNEL);
-	if (!s2mps11->ext_control_gpio)
+	if (!s2mps11->ext_control_gpiod)
 		return -ENOMEM;
-	/*
-	 * 0 is a valid GPIO so initialize all GPIO-s to negative value
-	 * to indicate that external control won't be used for this regulator.
-	 */
-	for (i = 0; i < rdev_num; i++)
-		s2mps11->ext_control_gpio[i] = -EINVAL;
 
 	if (!iodev->dev->of_node) {
 		if (iodev->pdata) {
@@ -1179,8 +1181,6 @@ static int s2mps11_pmic_probe(struct platform_device *pdev)
 	config.dev = &pdev->dev;
 	config.regmap = iodev->regmap_pmic;
 	config.driver_data = s2mps11;
-	config.ena_gpio_flags = GPIOF_OUT_INIT_HIGH;
-	config.ena_gpio_initialized = true;
 	for (i = 0; i < rdev_num; i++) {
 		struct regulator_dev *regulator;
 
@@ -1191,7 +1191,7 @@ static int s2mps11_pmic_probe(struct platform_device *pdev)
 			config.init_data = rdata[i].init_data;
 			config.of_node = rdata[i].of_node;
 		}
-		config.ena_gpio = s2mps11->ext_control_gpio[i];
+		config.ena_gpiod = s2mps11->ext_control_gpiod[i];
 
 		regulator = devm_regulator_register(&pdev->dev,
 						&regulators[i], &config);
@@ -1202,7 +1202,7 @@ static int s2mps11_pmic_probe(struct platform_device *pdev)
 			goto out;
 		}
 
-		if (gpio_is_valid(s2mps11->ext_control_gpio[i])) {
+		if (s2mps11->ext_control_gpiod[i]) {
 			ret = s2mps14_pmic_enable_ext_control(s2mps11,
 					regulator);
 			if (ret < 0) {
-- 
2.14.3

^ permalink raw reply	[flat|nested] 54+ messages in thread

* [PATCH 14/21] regulator: s5m8767: Pass descriptor instead of GPIO number
  2018-02-12 13:16 [PATCH 00/21] regulator: switch core to GPIO descriptors Linus Walleij
                   ` (12 preceding siblings ...)
  2018-02-12 13:17 ` [PATCH 13/21] regulator: s2mps11: Pass descriptor instead of GPIO number Linus Walleij
@ 2018-02-12 13:17 ` Linus Walleij
  2018-02-12 14:58   ` Lee Jones
  2018-05-24 19:13   ` Applied "regulator: s5m8767: Pass descriptor instead of GPIO number" to the regulator tree Mark Brown
  2018-02-12 13:17 ` [PATCH 15/21] regulator: tps65090: Pass descriptor instead of GPIO number Linus Walleij
                   ` (6 subsequent siblings)
  20 siblings, 2 replies; 54+ messages in thread
From: Linus Walleij @ 2018-02-12 13:17 UTC (permalink / raw)
  To: Liam Girdwood, Mark Brown
  Cc: linux-kernel, linux-gpio, Linus Walleij, Lee Jones

Instead of passing a global GPIO number for the enable GPIO, pass
a descriptor looked up from the device tree node for the
regulator.

This regulator supports passing platform data, but enable/sleep
regulators are looked up from the device tree exclusively, so
we can need not touch other files.

Cc: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
Lee: would be nice if you could ACK this smallish patch to
the MFD header.
---
 drivers/regulator/s5m8767.c      | 26 +++++++++++++++-----------
 include/linux/mfd/samsung/core.h |  4 +++-
 2 files changed, 18 insertions(+), 12 deletions(-)

diff --git a/drivers/regulator/s5m8767.c b/drivers/regulator/s5m8767.c
index 4836947e1521..b8443a360646 100644
--- a/drivers/regulator/s5m8767.c
+++ b/drivers/regulator/s5m8767.c
@@ -13,6 +13,7 @@
 
 #include <linux/err.h>
 #include <linux/of_gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/driver.h>
@@ -459,15 +460,14 @@ static void s5m8767_regulator_config_ext_control(struct s5m8767_info *s5m8767,
 		return;
 	}
 
-	if (!gpio_is_valid(rdata->ext_control_gpio)) {
+	if (!rdata->ext_control_gpiod) {
 		dev_warn(s5m8767->dev,
 				"ext-control for %s: GPIO not valid, ignoring\n",
-				rdata->reg_node->name);
+			 rdata->reg_node->name);
 		return;
 	}
 
-	config->ena_gpio = rdata->ext_control_gpio;
-	config->ena_gpio_flags = GPIOF_OUT_INIT_HIGH;
+	config->ena_gpiod = rdata->ext_control_gpiod;
 }
 
 /*
@@ -577,8 +577,14 @@ static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
 			continue;
 		}
 
-		rdata->ext_control_gpio = of_get_named_gpio(reg_np,
-			"s5m8767,pmic-ext-control-gpios", 0);
+		rdata->ext_control_gpiod = devm_gpiod_get_from_of_node(&pdev->dev,
+								       reg_np,
+								       "s5m8767,pmic-ext-control-gpios",
+								       0,
+								       GPIOD_OUT_HIGH,
+								       "s5m8767");
+		if (IS_ERR(rdata->ext_control_gpiod))
+			return PTR_ERR(rdata->ext_control_gpiod);
 
 		rdata->id = i;
 		rdata->initdata = of_get_regulator_init_data(
@@ -954,10 +960,8 @@ static int s5m8767_pmic_probe(struct platform_device *pdev)
 		config.driver_data = s5m8767;
 		config.regmap = iodev->regmap_pmic;
 		config.of_node = pdata->regulators[i].reg_node;
-		config.ena_gpio = -EINVAL;
-		config.ena_gpio_flags = 0;
-		config.ena_gpio_initialized = true;
-		if (gpio_is_valid(pdata->regulators[i].ext_control_gpio))
+		config.ena_gpiod = NULL;
+		if (pdata->regulators[i].ext_control_gpiod)
 			s5m8767_regulator_config_ext_control(s5m8767,
 					&pdata->regulators[i], &config);
 
@@ -970,7 +974,7 @@ static int s5m8767_pmic_probe(struct platform_device *pdev)
 			return ret;
 		}
 
-		if (gpio_is_valid(pdata->regulators[i].ext_control_gpio)) {
+		if (pdata->regulators[i].ext_control_gpiod) {
 			ret = s5m8767_enable_ext_control(s5m8767, rdev);
 			if (ret < 0) {
 				dev_err(s5m8767->dev,
diff --git a/include/linux/mfd/samsung/core.h b/include/linux/mfd/samsung/core.h
index 5a23dd4df432..28f4ae76271d 100644
--- a/include/linux/mfd/samsung/core.h
+++ b/include/linux/mfd/samsung/core.h
@@ -39,6 +39,8 @@
 #define STEP_12_5_MV		12500
 #define STEP_6_25_MV		6250
 
+struct gpio_desc;
+
 enum sec_device_type {
 	S5M8751X,
 	S5M8763X,
@@ -151,7 +153,7 @@ struct sec_regulator_data {
 	int				id;
 	struct regulator_init_data	*initdata;
 	struct device_node		*reg_node;
-	int				ext_control_gpio;
+	struct gpio_desc		*ext_control_gpiod;
 };
 
 /*
-- 
2.14.3

^ permalink raw reply	[flat|nested] 54+ messages in thread

* [PATCH 15/21] regulator: tps65090: Pass descriptor instead of GPIO number
  2018-02-12 13:16 [PATCH 00/21] regulator: switch core to GPIO descriptors Linus Walleij
                   ` (13 preceding siblings ...)
  2018-02-12 13:17 ` [PATCH 14/21] regulator: s5m8767: Pass descriptor instead of GPIO number Linus Walleij
@ 2018-02-12 13:17 ` Linus Walleij
  2018-02-12 14:58   ` Lee Jones
  2018-05-24 19:13   ` Applied "regulator: tps65090: Pass descriptor instead of GPIO number" to the regulator tree Mark Brown
  2018-02-12 13:17 ` [PATCH 16/21] regulator: wm8994: Pass descriptor instead of GPIO number Linus Walleij
                   ` (5 subsequent siblings)
  20 siblings, 2 replies; 54+ messages in thread
From: Linus Walleij @ 2018-02-12 13:17 UTC (permalink / raw)
  To: Liam Girdwood, Mark Brown
  Cc: linux-kernel, linux-gpio, Linus Walleij, Lee Jones

Instead of passing a global GPIO number for the enable GPIO, pass
a descriptor looked up from the device tree node for the
regulator.

This regulator supports passing platform data, but enable/sleep
regulators are looked up from the device tree exclusively, so
we can need not touch other files.

Cc: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
Lee: it would be nice if you could ACK this smallish patch to
the MFD header.
---
 drivers/regulator/tps65090-regulator.c | 50 ++++++++++++++++------------------
 include/linux/mfd/tps65090.h           |  8 ++++--
 2 files changed, 28 insertions(+), 30 deletions(-)

diff --git a/drivers/regulator/tps65090-regulator.c b/drivers/regulator/tps65090-regulator.c
index 395f35dc8cdb..2d398fa3b720 100644
--- a/drivers/regulator/tps65090-regulator.c
+++ b/drivers/regulator/tps65090-regulator.c
@@ -19,8 +19,8 @@
 #include <linux/module.h>
 #include <linux/delay.h>
 #include <linux/init.h>
-#include <linux/gpio.h>
-#include <linux/of_gpio.h>
+#include <linux/of.h>
+#include <linux/gpio/consumer.h>
 #include <linux/slab.h>
 #include <linux/err.h>
 #include <linux/platform_device.h>
@@ -300,26 +300,6 @@ static int tps65090_regulator_disable_ext_control(
 	return tps65090_config_ext_control(ri, false);
 }
 
-static void tps65090_configure_regulator_config(
-		struct tps65090_regulator_plat_data *tps_pdata,
-		struct regulator_config *config)
-{
-	if (gpio_is_valid(tps_pdata->gpio)) {
-		int gpio_flag = GPIOF_OUT_INIT_LOW;
-
-		if (tps_pdata->reg_init_data->constraints.always_on ||
-				tps_pdata->reg_init_data->constraints.boot_on)
-			gpio_flag = GPIOF_OUT_INIT_HIGH;
-
-		config->ena_gpio = tps_pdata->gpio;
-		config->ena_gpio_initialized = true;
-		config->ena_gpio_flags = gpio_flag;
-	} else {
-		config->ena_gpio = -EINVAL;
-		config->ena_gpio_initialized = false;
-	}
-}
-
 #ifdef CONFIG_OF
 static struct of_regulator_match tps65090_matches[] = {
 	{ .name = "dcdc1", },
@@ -385,9 +365,26 @@ static struct tps65090_platform_data *tps65090_parse_dt_reg_data(
 		rpdata->enable_ext_control = of_property_read_bool(
 					tps65090_matches[idx].of_node,
 					"ti,enable-ext-control");
-		if (rpdata->enable_ext_control)
-			rpdata->gpio = of_get_named_gpio(np,
-					"dcdc-ext-control-gpios", 0);
+		if (rpdata->enable_ext_control) {
+			enum gpiod_flags gflags;
+
+			if (ri_data->constraints.always_on ||
+			    ri_data->constraints.boot_on)
+				gflags = GPIOD_OUT_HIGH;
+			else
+				gflags = GPIOD_OUT_LOW;
+
+			rpdata->gpiod = devm_gpiod_get_from_of_node(&pdev->dev,
+								    tps65090_matches[idx].of_node,
+								    "dcdc-ext-control-gpios", 0,
+								    gflags,
+								    "tps65090");
+			if (IS_ERR(rpdata->gpiod))
+				return ERR_CAST(rpdata->gpiod);
+			if (!rpdata->gpiod)
+				dev_err(&pdev->dev,
+					"could not find DCDC external control GPIO\n");
+		}
 
 		if (of_property_read_u32(tps65090_matches[idx].of_node,
 					 "ti,overcurrent-wait",
@@ -455,8 +452,7 @@ static int tps65090_regulator_probe(struct platform_device *pdev)
 		 */
 		if (tps_pdata && is_dcdc(num) && tps_pdata->reg_init_data) {
 			if (tps_pdata->enable_ext_control) {
-				tps65090_configure_regulator_config(
-						tps_pdata, &config);
+				config.ena_gpiod = tps_pdata->gpiod;
 				ri->desc->ops = &tps65090_ext_control_ops;
 			} else {
 				ret = tps65090_regulator_disable_ext_control(
diff --git a/include/linux/mfd/tps65090.h b/include/linux/mfd/tps65090.h
index 67d144b3b8f9..f05bf4a146e2 100644
--- a/include/linux/mfd/tps65090.h
+++ b/include/linux/mfd/tps65090.h
@@ -83,6 +83,8 @@ enum {
 #define TPS65090_MAX_REG	TPS65090_REG_AD_OUT2
 #define TPS65090_NUM_REGS	(TPS65090_MAX_REG + 1)
 
+struct gpio_desc;
+
 struct tps65090 {
 	struct device		*dev;
 	struct regmap		*rmap;
@@ -95,8 +97,8 @@ struct tps65090 {
  * @reg_init_data: The regulator init data.
  * @enable_ext_control: Enable extrenal control or not. Only available for
  *     DCDC1, DCDC2 and DCDC3.
- * @gpio: Gpio number if external control is enabled and controlled through
- *     gpio.
+ * @gpiod: Gpio descriptor if external control is enabled and controlled through
+ *     gpio
  * @overcurrent_wait_valid: True if the overcurrent_wait should be applied.
  * @overcurrent_wait: Value to set as the overcurrent wait time.  This is the
  *     actual bitfield value, not a time in ms (valid value are 0 - 3).
@@ -104,7 +106,7 @@ struct tps65090 {
 struct tps65090_regulator_plat_data {
 	struct regulator_init_data *reg_init_data;
 	bool enable_ext_control;
-	int gpio;
+	struct gpio_desc *gpiod;
 	bool overcurrent_wait_valid;
 	int overcurrent_wait;
 };
-- 
2.14.3

^ permalink raw reply	[flat|nested] 54+ messages in thread

* [PATCH 16/21] regulator: wm8994: Pass descriptor instead of GPIO number
  2018-02-12 13:16 [PATCH 00/21] regulator: switch core to GPIO descriptors Linus Walleij
                   ` (14 preceding siblings ...)
  2018-02-12 13:17 ` [PATCH 15/21] regulator: tps65090: Pass descriptor instead of GPIO number Linus Walleij
@ 2018-02-12 13:17 ` Linus Walleij
  2018-02-12 14:58   ` Lee Jones
                     ` (2 more replies)
  2018-02-12 13:17 ` [PATCH 17/21] regulator: core: Only support passing enable GPIO descriptors Linus Walleij
                   ` (4 subsequent siblings)
  20 siblings, 3 replies; 54+ messages in thread
From: Linus Walleij @ 2018-02-12 13:17 UTC (permalink / raw)
  To: Liam Girdwood, Mark Brown
  Cc: linux-kernel, linux-gpio, Linus Walleij, patches, Charles Keepax,
	Lee Jones

Instead of passing a global GPIO number for the enable GPIO, pass
a descriptor looked up from the device tree node or the board file
decriptor table for the regulator.

There is a single board file passing the GPIOs for LDO1 and LDO2
through platform data, so augment this to pass descriptors
associated with the i2c device as well.

Cc: patches@opensource.cirrus.com
Cc: Charles Keepax <ckeepax@opensource.cirrus.com>
Cc: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
Lee: this patch is touching the MFD core driver for WM8994,
but as with all other patches we just change the regulator
parts. Would be nice if you could ACK it.
---
 arch/arm/mach-s3c64xx/mach-crag6410-module.c | 18 ++++++++++++++++--
 drivers/mfd/wm8994-core.c                    |  9 ---------
 drivers/regulator/wm8994-regulator.c         | 19 +++++++++++--------
 include/linux/mfd/wm8994/pdata.h             |  3 ---
 4 files changed, 27 insertions(+), 22 deletions(-)

diff --git a/arch/arm/mach-s3c64xx/mach-crag6410-module.c b/arch/arm/mach-s3c64xx/mach-crag6410-module.c
index f00988705408..a4db97f156d7 100644
--- a/arch/arm/mach-s3c64xx/mach-crag6410-module.c
+++ b/arch/arm/mach-s3c64xx/mach-crag6410-module.c
@@ -9,6 +9,7 @@
 #include <linux/interrupt.h>
 #include <linux/i2c.h>
 #include <linux/spi/spi.h>
+#include <linux/gpio/machine.h>
 
 #include <linux/mfd/wm831x/irq.h>
 #include <linux/mfd/wm831x/gpio.h>
@@ -193,8 +194,8 @@ static struct wm8994_pdata wm8994_pdata = {
 		0x3,          /* IRQ out, active high, CMOS */
 	},
 	.ldo = {
-		 { .enable = S3C64XX_GPN(6), .init_data = &wm8994_ldo1, },
-		 { .enable = S3C64XX_GPN(4), .init_data = &wm8994_ldo2, },
+		 { .init_data = &wm8994_ldo1, },
+		 { .init_data = &wm8994_ldo2, },
 	},
 };
 
@@ -202,6 +203,18 @@ static const struct i2c_board_info wm1277_devs[] = {
 	{ I2C_BOARD_INFO("wm8958", 0x1a),  /* WM8958 is the superset */
 	  .platform_data = &wm8994_pdata,
 	  .irq = GLENFARCLAS_PMIC_IRQ_BASE + WM831X_IRQ_GPIO_2,
+	  .dev_name = "wm8958",
+	},
+};
+
+static struct gpiod_lookup_table wm8994_gpiod_table = {
+	.dev_id = "i2c-wm8958", /* I2C device name */
+	.table = {
+		GPIO_LOOKUP("GPION", 6,
+			    "wlf,ldo1ena", GPIO_ACTIVE_HIGH),
+		GPIO_LOOKUP("GPION", 4,
+			    "wlf,ldo2ena", GPIO_ACTIVE_HIGH),
+		{ },
 	},
 };
 
@@ -366,6 +379,7 @@ static int wlf_gf_module_probe(struct i2c_client *i2c,
 					    rev == gf_mods[i].rev))
 			break;
 
+	gpiod_add_lookup_table(&wm8994_gpiod_table);
 	if (i < ARRAY_SIZE(gf_mods)) {
 		dev_info(&i2c->dev, "%s revision %d\n",
 			 gf_mods[i].name, rev + 1);
diff --git a/drivers/mfd/wm8994-core.c b/drivers/mfd/wm8994-core.c
index 953d0790ffd5..c409464231f6 100644
--- a/drivers/mfd/wm8994-core.c
+++ b/drivers/mfd/wm8994-core.c
@@ -21,7 +21,6 @@
 #include <linux/mfd/core.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
-#include <linux/of_gpio.h>
 #include <linux/pm_runtime.h>
 #include <linux/regmap.h>
 #include <linux/regulator/consumer.h>
@@ -302,14 +301,6 @@ static int wm8994_set_pdata_from_of(struct wm8994 *wm8994)
 	if (of_find_property(np, "wlf,ldoena-always-driven", NULL))
 		pdata->lineout2fb = true;
 
-	pdata->ldo[0].enable = of_get_named_gpio(np, "wlf,ldo1ena", 0);
-	if (pdata->ldo[0].enable < 0)
-		pdata->ldo[0].enable = 0;
-
-	pdata->ldo[1].enable = of_get_named_gpio(np, "wlf,ldo2ena", 0);
-	if (pdata->ldo[1].enable < 0)
-		pdata->ldo[1].enable = 0;
-
 	return 0;
 }
 #else
diff --git a/drivers/regulator/wm8994-regulator.c b/drivers/regulator/wm8994-regulator.c
index 7a4ce6df4f22..d3a5f48119c2 100644
--- a/drivers/regulator/wm8994-regulator.c
+++ b/drivers/regulator/wm8994-regulator.c
@@ -19,7 +19,7 @@
 #include <linux/platform_device.h>
 #include <linux/regulator/driver.h>
 #include <linux/regulator/machine.h>
-#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/slab.h>
 
 #include <linux/mfd/wm8994/core.h>
@@ -129,6 +129,7 @@ static int wm8994_ldo_probe(struct platform_device *pdev)
 	int id = pdev->id % ARRAY_SIZE(pdata->ldo);
 	struct regulator_config config = { };
 	struct wm8994_ldo *ldo;
+	struct gpio_desc *gpiod;
 	int ret;
 
 	dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
@@ -145,12 +146,14 @@ static int wm8994_ldo_probe(struct platform_device *pdev)
 	config.driver_data = ldo;
 	config.regmap = wm8994->regmap;
 	config.init_data = &ldo->init_data;
-	if (pdata) {
-		config.ena_gpio = pdata->ldo[id].enable;
-	} else if (wm8994->dev->of_node) {
-		config.ena_gpio = wm8994->pdata.ldo[id].enable;
-		config.ena_gpio_initialized = true;
-	}
+
+	/* Look up LDO enable GPIO from the parent device node */
+	gpiod = devm_gpiod_get_optional(pdev->dev.parent,
+					id ? "wlf,ldo2ena" : "wlf,ldo1ena",
+					GPIOD_OUT_LOW);
+	if (IS_ERR(gpiod))
+		return PTR_ERR(gpiod);
+	config.ena_gpiod = gpiod;
 
 	/* Use default constraints if none set up */
 	if (!pdata || !pdata->ldo[id].init_data || wm8994->dev->of_node) {
@@ -159,7 +162,7 @@ static int wm8994_ldo_probe(struct platform_device *pdev)
 
 		ldo->init_data = wm8994_ldo_default[id];
 		ldo->init_data.consumer_supplies = &ldo->supply;
-		if (!config.ena_gpio)
+		if (!gpiod)
 			ldo->init_data.constraints.valid_ops_mask = 0;
 	} else {
 		ldo->init_data = *pdata->ldo[id].init_data;
diff --git a/include/linux/mfd/wm8994/pdata.h b/include/linux/mfd/wm8994/pdata.h
index 90c60524a496..fca67bd194e2 100644
--- a/include/linux/mfd/wm8994/pdata.h
+++ b/include/linux/mfd/wm8994/pdata.h
@@ -20,9 +20,6 @@
 #define WM8994_NUM_AIF   3
 
 struct wm8994_ldo_pdata {
-	/** GPIOs to enable regulator, 0 or less if not available */
-	int enable;
-
 	const struct regulator_init_data *init_data;
 };
 
-- 
2.14.3

^ permalink raw reply	[flat|nested] 54+ messages in thread

* [PATCH 17/21] regulator: core: Only support passing enable GPIO descriptors
  2018-02-12 13:16 [PATCH 00/21] regulator: switch core to GPIO descriptors Linus Walleij
                   ` (15 preceding siblings ...)
  2018-02-12 13:17 ` [PATCH 16/21] regulator: wm8994: Pass descriptor instead of GPIO number Linus Walleij
@ 2018-02-12 13:17 ` Linus Walleij
  2018-02-12 13:17 ` [PATCH 18/21] regulator: fixed/gpio: Pull inversion/OD into gpiolib Linus Walleij
                   ` (3 subsequent siblings)
  20 siblings, 0 replies; 54+ messages in thread
From: Linus Walleij @ 2018-02-12 13:17 UTC (permalink / raw)
  To: Liam Girdwood, Mark Brown; +Cc: linux-kernel, linux-gpio, Linus Walleij

Now that we changed all providers to pass descriptors into the core
for enable GPIOs instead of a global GPIO number, delete the support
for passing GPIO numbers in, and we get a cleanup and size reduction
in the core, and from a GPIO point of view we use the modern, cleaner
interface.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
 drivers/regulator/core.c         | 32 ++++++--------------------------
 include/linux/regulator/driver.h | 10 +---------
 2 files changed, 7 insertions(+), 35 deletions(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 4549b93b0ff9..fc5346d23fd7 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -23,7 +23,6 @@
 #include <linux/mutex.h>
 #include <linux/suspend.h>
 #include <linux/delay.h>
-#include <linux/gpio.h>
 #include <linux/gpio/consumer.h>
 #include <linux/of.h>
 #include <linux/regmap.h>
@@ -1935,35 +1934,19 @@ static int regulator_ena_gpio_request(struct regulator_dev *rdev,
 {
 	struct regulator_enable_gpio *pin;
 	struct gpio_desc *gpiod;
-	int ret;
 
-	if (config->ena_gpiod)
-		gpiod = config->ena_gpiod;
-	else
-		gpiod = gpio_to_desc(config->ena_gpio);
+	gpiod = config->ena_gpiod;
 
 	list_for_each_entry(pin, &regulator_ena_gpio_list, list) {
 		if (pin->gpiod == gpiod) {
-			rdev_dbg(rdev, "GPIO %d is already used\n",
-				config->ena_gpio);
+			rdev_dbg(rdev, "GPIO is already used\n");
 			goto update_ena_gpio_to_rdev;
 		}
 	}
 
-	if (!config->ena_gpiod) {
-		ret = gpio_request_one(config->ena_gpio,
-				       GPIOF_DIR_OUT | config->ena_gpio_flags,
-				       rdev_get_name(rdev));
-		if (ret)
-			return ret;
-	}
-
 	pin = kzalloc(sizeof(struct regulator_enable_gpio), GFP_KERNEL);
-	if (pin == NULL) {
-		if (!config->ena_gpiod)
-			gpio_free(config->ena_gpio);
+	if (pin == NULL)
 		return -ENOMEM;
-	}
 
 	pin->gpiod = gpiod;
 	pin->ena_gpio_invert = config->ena_gpio_invert;
@@ -1987,7 +1970,6 @@ static void regulator_ena_gpio_free(struct regulator_dev *rdev)
 		if (pin->gpiod == rdev->ena_pin->gpiod) {
 			if (pin->request_count <= 1) {
 				pin->request_count = 0;
-				gpiod_put(pin->gpiod);
 				list_del(&pin->list);
 				kfree(pin);
 				rdev->ena_pin = NULL;
@@ -4160,15 +4142,13 @@ regulator_register(const struct regulator_desc *regulator_desc,
 			goto clean;
 	}
 
-	if (config->ena_gpiod ||
-	    ((config->ena_gpio || config->ena_gpio_initialized) &&
-	     gpio_is_valid(config->ena_gpio))) {
+	if (config->ena_gpiod) {
 		mutex_lock(&regulator_list_mutex);
 		ret = regulator_ena_gpio_request(rdev, config);
 		mutex_unlock(&regulator_list_mutex);
 		if (ret != 0) {
-			rdev_err(rdev, "Failed to request enable GPIO%d: %d\n",
-				 config->ena_gpio, ret);
+			rdev_err(rdev, "Failed to request enable GPIO: %d\n",
+				 ret);
 			goto clean;
 		}
 	}
diff --git a/include/linux/regulator/driver.h b/include/linux/regulator/driver.h
index 4fc96cb8e5d7..8900c230c899 100644
--- a/include/linux/regulator/driver.h
+++ b/include/linux/regulator/driver.h
@@ -384,13 +384,8 @@ struct regulator_desc {
  *           NULL).
  * @regmap: regmap to use for core regmap helpers if dev_get_regmap() is
  *          insufficient.
- * @ena_gpio_initialized: GPIO controlling regulator enable was properly
- *                        initialized, meaning that >= 0 is a valid gpio
- *                        identifier and < 0 is a non existent gpio.
- * @ena_gpio: GPIO controlling regulator enable.
- * @ena_gpiod: GPIO descriptor controlling regulator enable.
+ * @ena_gpiod: GPIO controlling regulator enable.
  * @ena_gpio_invert: Sense for GPIO enable control.
- * @ena_gpio_flags: Flags to use when calling gpio_request_one()
  */
 struct regulator_config {
 	struct device *dev;
@@ -399,11 +394,8 @@ struct regulator_config {
 	struct device_node *of_node;
 	struct regmap *regmap;
 
-	bool ena_gpio_initialized;
-	int ena_gpio;
 	struct gpio_desc *ena_gpiod;
 	unsigned int ena_gpio_invert:1;
-	unsigned int ena_gpio_flags;
 };
 
 /*
-- 
2.14.3

^ permalink raw reply	[flat|nested] 54+ messages in thread

* [PATCH 18/21] regulator: fixed/gpio: Pull inversion/OD into gpiolib
  2018-02-12 13:16 [PATCH 00/21] regulator: switch core to GPIO descriptors Linus Walleij
                   ` (16 preceding siblings ...)
  2018-02-12 13:17 ` [PATCH 17/21] regulator: core: Only support passing enable GPIO descriptors Linus Walleij
@ 2018-02-12 13:17 ` Linus Walleij
  2018-02-17  9:59   ` Robert Jarzmik
  2018-02-12 13:17 ` [PATCH 19/21] regulator: fixed/gpio: Update device tree bindings Linus Walleij
                   ` (2 subsequent siblings)
  20 siblings, 1 reply; 54+ messages in thread
From: Linus Walleij @ 2018-02-12 13:17 UTC (permalink / raw)
  To: Liam Girdwood, Mark Brown
  Cc: linux-kernel, linux-gpio, Linus Walleij, arm, Alexander Shiyan,
	Haojian Zhuang, Aaro Koskinen, Tony Lindgren, Mike Rapoport,
	Robert Jarzmik, Philipp Zabel, Daniel Mack, Marc Zyngier,
	Geert Uytterhoeven

This pushes the handling of inversion semantics and open drain
settings to the GPIO descriptor and gpiolib. All affected board
files are also augmented.

This is especiallt nice since we don't have to have any
confusing flags passed around to the left and right littering
the fixed and GPIO regulator drivers and the regulator core.
It is all just very straight-forward: the core asks the GPIO
line to be asserted or deasserted and gpiolib deals with the
rest depending on how the platform is configured: if the line
is active low, it deals with that, if the line is open drain,
it deals with that too.

Cc: arm@kernel.orh # ARM systems
Cc: Alexander Shiyan <shc_work@mail.ru> # i.MX boards user
Cc: Haojian Zhuang <haojian.zhuang@gmail.com> # MMP2 maintainer
Cc: Aaro Koskinen <aaro.koskinen@iki.fi> # OMAP1 maintainer
Cc: Tony Lindgren <tony@atomide.com> # OMAP1,2,3 maintainer
Cc: Mike Rapoport <mike@compulab.co.il> # EM-X270 maintainer
Cc: Robert Jarzmik <robert.jarzmik@free.fr> # EZX maintainer
Cc: Philipp Zabel <philipp.zabel@gmail.com> # Magician maintainer
Cc: Daniel Mack <zonque@gmail.com> # Raumfeld maintainer
Cc: Marc Zyngier <marc.zyngier@arm.com> # Zeus maintainer
Cc: Geert Uytterhoeven <geert+renesas@glider.be> # SuperH pinctrl/GPIO maintainer
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
Maintainers: I would like to see ACKs or Tested-by's if possible,
see patch 0/21 for information on the series.
---
 arch/arm/mach-imx/mach-mx21ads.c                   |  1 -
 arch/arm/mach-imx/mach-mx27ads.c                   |  2 +-
 arch/arm/mach-mmp/brownstone.c                     |  1 -
 arch/arm/mach-omap1/board-ams-delta.c              |  1 -
 arch/arm/mach-omap2/pdata-quirks.c                 |  1 -
 arch/arm/mach-pxa/em-x270.c                        |  1 -
 arch/arm/mach-pxa/ezx.c                            |  3 +--
 arch/arm/mach-pxa/hx4700.c                         |  3 +--
 arch/arm/mach-pxa/magician.c                       |  3 +--
 arch/arm/mach-pxa/raumfeld.c                       |  1 -
 arch/arm/mach-pxa/zeus.c                           |  3 +--
 arch/blackfin/mach-bf537/boards/stamp.c            |  1 -
 arch/sh/boards/mach-ecovec24/setup.c               |  2 --
 .../intel-mid/device_libs/platform_bcm43xx.c       |  1 -
 drivers/regulator/core.c                           |  8 ++----
 drivers/regulator/da9055-regulator.c               |  1 -
 drivers/regulator/fixed.c                          | 30 ++++++----------------
 drivers/regulator/gpio-regulator.c                 | 24 +++++++----------
 include/linux/regulator/fixed.h                    | 10 --------
 include/linux/regulator/gpio-regulator.h           |  3 ---
 20 files changed, 24 insertions(+), 76 deletions(-)

diff --git a/arch/arm/mach-imx/mach-mx21ads.c b/arch/arm/mach-imx/mach-mx21ads.c
index 5d3b6b4fe6db..8c4a4920468a 100644
--- a/arch/arm/mach-imx/mach-mx21ads.c
+++ b/arch/arm/mach-imx/mach-mx21ads.c
@@ -205,7 +205,6 @@ static struct regulator_init_data mx21ads_lcd_regulator_init_data = {
 static struct fixed_voltage_config mx21ads_lcd_regulator_pdata = {
 	.supply_name	= "LCD",
 	.microvolts	= 3300000,
-	.enable_high	= 1,
 	.init_data	= &mx21ads_lcd_regulator_init_data,
 };
 
diff --git a/arch/arm/mach-imx/mach-mx27ads.c b/arch/arm/mach-imx/mach-mx27ads.c
index 0fdb88db0cbd..08a7e217b9e6 100644
--- a/arch/arm/mach-imx/mach-mx27ads.c
+++ b/arch/arm/mach-imx/mach-mx27ads.c
@@ -237,7 +237,7 @@ static struct fixed_voltage_config mx27ads_lcd_regulator_pdata = {
 static struct gpiod_lookup_table mx27ads_lcd_regulator_gpiod_table = {
 	.dev_id = "reg-fixed-voltage.0", /* Let's hope ID 0 is what we get */
 	.table = {
-		GPIO_LOOKUP("LCD", 0, "enable", GPIO_ACTIVE_HIGH),
+		GPIO_LOOKUP("LCD", 0, "enable", GPIO_ACTIVE_LOW),
 		{ },
 	},
 };
diff --git a/arch/arm/mach-mmp/brownstone.c b/arch/arm/mach-mmp/brownstone.c
index 563b5a278d65..502343b32c7f 100644
--- a/arch/arm/mach-mmp/brownstone.c
+++ b/arch/arm/mach-mmp/brownstone.c
@@ -149,7 +149,6 @@ static struct regulator_init_data brownstone_v_5vp_data = {
 static struct fixed_voltage_config brownstone_v_5vp = {
 	.supply_name		= "v_5vp",
 	.microvolts		= 5000000,
-	.enable_high		= 1,
 	.enabled_at_boot	= 1,
 	.init_data		= &brownstone_v_5vp_data,
 };
diff --git a/arch/arm/mach-omap1/board-ams-delta.c b/arch/arm/mach-omap1/board-ams-delta.c
index 759fa18f6ab4..22e94da4af85 100644
--- a/arch/arm/mach-omap1/board-ams-delta.c
+++ b/arch/arm/mach-omap1/board-ams-delta.c
@@ -275,7 +275,6 @@ static struct fixed_voltage_config modem_nreset_config = {
 	.supply_name		= "modem_nreset",
 	.microvolts		= 3300000,
 	.startup_delay		= 25000,
-	.enable_high		= 1,
 	.enabled_at_boot	= 1,
 	.init_data		= &modem_nreset_data,
 };
diff --git a/arch/arm/mach-omap2/pdata-quirks.c b/arch/arm/mach-omap2/pdata-quirks.c
index 4ddde151809c..2ff620b01367 100644
--- a/arch/arm/mach-omap2/pdata-quirks.c
+++ b/arch/arm/mach-omap2/pdata-quirks.c
@@ -332,7 +332,6 @@ static struct fixed_voltage_config pandora_vwlan = {
 	.supply_name		= "vwlan",
 	.microvolts		= 1800000, /* 1.8V */
 	.startup_delay		= 50000, /* 50ms */
-	.enable_high		= 1,
 	.init_data		= &pandora_vmmc3,
 };
 
diff --git a/arch/arm/mach-pxa/em-x270.c b/arch/arm/mach-pxa/em-x270.c
index 6d7d93981098..8d9ec158f118 100644
--- a/arch/arm/mach-pxa/em-x270.c
+++ b/arch/arm/mach-pxa/em-x270.c
@@ -987,7 +987,6 @@ static struct fixed_voltage_config camera_dummy_config = {
 	.supply_name		= "camera_vdd",
 	.input_supply		= "vcc cam",
 	.microvolts		= 2800000,
-	.enable_high		= 0,
 	.init_data		= &camera_dummy_initdata,
 };
 
diff --git a/arch/arm/mach-pxa/ezx.c b/arch/arm/mach-pxa/ezx.c
index 2b4bd6d94855..13ebdfd697cc 100644
--- a/arch/arm/mach-pxa/ezx.c
+++ b/arch/arm/mach-pxa/ezx.c
@@ -714,7 +714,6 @@ static struct regulator_init_data camera_regulator_initdata = {
 static struct fixed_voltage_config camera_regulator_config = {
 	.supply_name		= "camera_vdd",
 	.microvolts		= 2800000,
-	.enable_high		= 0,
 	.init_data		= &camera_regulator_initdata,
 };
 
@@ -730,7 +729,7 @@ static struct gpiod_lookup_table camera_supply_gpiod_table = {
 	.dev_id = "reg-fixed-voltage.1",
 	.table = {
 		GPIO_LOOKUP("gpio-pxa", GPIO50_nCAM_EN,
-			    "enable", GPIO_ACTIVE_HIGH),
+			    "enable", GPIO_ACTIVE_LOW),
 		{ },
 	},
 };
diff --git a/arch/arm/mach-pxa/hx4700.c b/arch/arm/mach-pxa/hx4700.c
index 6717a10180eb..05148016c620 100644
--- a/arch/arm/mach-pxa/hx4700.c
+++ b/arch/arm/mach-pxa/hx4700.c
@@ -712,7 +712,6 @@ static struct gpio_regulator_state bq24022_states[] = {
 static struct gpio_regulator_config bq24022_info = {
 	.supply_name = "bq24022",
 
-	.enable_high = 0,
 	.enabled_at_boot = 0,
 
 	.gpios = bq24022_gpios,
@@ -737,7 +736,7 @@ static struct gpiod_lookup_table bq24022_gpiod_table = {
 	.dev_id = "gpio-regulator",
 	.table = {
 		GPIO_LOOKUP("gpio-pxa", GPIO72_HX4700_BQ24022_nCHARGE_EN,
-			    "enable", GPIO_ACTIVE_HIGH),
+			    "enable", GPIO_ACTIVE_LOW),
 		{ },
 	},
 };
diff --git a/arch/arm/mach-pxa/magician.c b/arch/arm/mach-pxa/magician.c
index 9a5bda3ea194..fab63c52d50e 100644
--- a/arch/arm/mach-pxa/magician.c
+++ b/arch/arm/mach-pxa/magician.c
@@ -657,7 +657,6 @@ static struct gpio_regulator_state bq24022_states[] = {
 static struct gpio_regulator_config bq24022_info = {
 	.supply_name		= "bq24022",
 
-	.enable_high		= 0,
 	.enabled_at_boot	= 1,
 
 	.gpios			= bq24022_gpios,
@@ -682,7 +681,7 @@ static struct gpiod_lookup_table bq24022_gpiod_table = {
 	.dev_id = "gpio-regulator",
 	.table = {
 		GPIO_LOOKUP("gpio-pxa", GPIO30_MAGICIAN_BQ24022_nCHARGE_EN,
-			    "enable", GPIO_ACTIVE_HIGH),
+			    "enable", GPIO_ACTIVE_LOW),
 		{ },
 	},
 };
diff --git a/arch/arm/mach-pxa/raumfeld.c b/arch/arm/mach-pxa/raumfeld.c
index 58833dcd2293..67e6e0759c78 100644
--- a/arch/arm/mach-pxa/raumfeld.c
+++ b/arch/arm/mach-pxa/raumfeld.c
@@ -875,7 +875,6 @@ static struct regulator_init_data audio_va_initdata = {
 static struct fixed_voltage_config audio_va_config = {
 	.supply_name		= "audio_va",
 	.microvolts		= 5000000,
-	.enable_high		= 1,
 	.enabled_at_boot	= 0,
 	.init_data		= &audio_va_initdata,
 };
diff --git a/arch/arm/mach-pxa/zeus.c b/arch/arm/mach-pxa/zeus.c
index 58e05afcece0..428c2db6818a 100644
--- a/arch/arm/mach-pxa/zeus.c
+++ b/arch/arm/mach-pxa/zeus.c
@@ -426,7 +426,7 @@ static struct gpiod_lookup_table can_regulator_gpiod_table = {
 	.dev_id = "reg-fixed-voltage.0",
 	.table = {
 		GPIO_LOOKUP("gpio-pxa", ZEUS_CAN_SHDN_GPIO,
-			    "enable", GPIO_ACTIVE_HIGH),
+			    "enable", GPIO_ACTIVE_LOW),
 		{ },
 	},
 };
@@ -547,7 +547,6 @@ static struct regulator_init_data zeus_ohci_regulator_data = {
 static struct fixed_voltage_config zeus_ohci_regulator_config = {
 	.supply_name		= "vbus2",
 	.microvolts		= 5000000, /* 5.0V */
-	.enable_high		= 1,
 	.startup_delay		= 0,
 	.init_data		= &zeus_ohci_regulator_data,
 };
diff --git a/arch/blackfin/mach-bf537/boards/stamp.c b/arch/blackfin/mach-bf537/boards/stamp.c
index 0adc34e8c975..648df18c4ccd 100644
--- a/arch/blackfin/mach-bf537/boards/stamp.c
+++ b/arch/blackfin/mach-bf537/boards/stamp.c
@@ -2696,7 +2696,6 @@ static struct regulator_init_data adp_switch_regulator_data = {
 static struct fixed_voltage_config adp_switch_pdata = {
 	.supply_name = REGULATOR_ADP122,
 	.microvolts = REGULATOR_ADP122_UV,
-	.enable_high = 1,
 	.enabled_at_boot = 0,
 	.init_data = &adp_switch_regulator_data,
 };
diff --git a/arch/sh/boards/mach-ecovec24/setup.c b/arch/sh/boards/mach-ecovec24/setup.c
index 2b8472431f02..934482f8bce8 100644
--- a/arch/sh/boards/mach-ecovec24/setup.c
+++ b/arch/sh/boards/mach-ecovec24/setup.c
@@ -555,7 +555,6 @@ static struct regulator_init_data cn12_power_init_data = {
 static struct fixed_voltage_config cn12_power_info = {
 	.supply_name = "CN12 SD/MMC Vdd",
 	.microvolts = 3300000,
-	.enable_high = 1,
 	.init_data = &cn12_power_init_data,
 };
 
@@ -596,7 +595,6 @@ static struct regulator_init_data sdhi0_power_init_data = {
 static struct fixed_voltage_config sdhi0_power_info = {
 	.supply_name = "CN11 SD/MMC Vdd",
 	.microvolts = 3300000,
-	.enable_high = 1,
 	.init_data = &sdhi0_power_init_data,
 };
 
diff --git a/arch/x86/platform/intel-mid/device_libs/platform_bcm43xx.c b/arch/x86/platform/intel-mid/device_libs/platform_bcm43xx.c
index d185d3696fc5..1ec518472344 100644
--- a/arch/x86/platform/intel-mid/device_libs/platform_bcm43xx.c
+++ b/arch/x86/platform/intel-mid/device_libs/platform_bcm43xx.c
@@ -44,7 +44,6 @@ static struct fixed_voltage_config bcm43xx_vmmc = {
 	 */
 	.microvolts		= 2000000,		/* 1.8V */
 	.startup_delay		= 250 * 1000,		/* 250ms */
-	.enable_high		= 1,			/* active high */
 	.enabled_at_boot	= 0,			/* disabled at boot */
 	.init_data		= &bcm43xx_vmmc_data,
 };
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index fc5346d23fd7..4554f52818f9 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -79,7 +79,6 @@ struct regulator_enable_gpio {
 	struct gpio_desc *gpiod;
 	u32 enable_count;	/* a number of enabled shared GPIO */
 	u32 request_count;	/* a number of requested shared GPIO */
-	unsigned int ena_gpio_invert:1;
 };
 
 /*
@@ -1949,7 +1948,6 @@ static int regulator_ena_gpio_request(struct regulator_dev *rdev,
 		return -ENOMEM;
 
 	pin->gpiod = gpiod;
-	pin->ena_gpio_invert = config->ena_gpio_invert;
 	list_add(&pin->list, &regulator_ena_gpio_list);
 
 update_ena_gpio_to_rdev:
@@ -1999,8 +1997,7 @@ static int regulator_ena_gpio_ctrl(struct regulator_dev *rdev, bool enable)
 	if (enable) {
 		/* Enable GPIO at initial use */
 		if (pin->enable_count == 0)
-			gpiod_set_value_cansleep(pin->gpiod,
-						 !pin->ena_gpio_invert);
+			gpiod_set_value_cansleep(pin->gpiod, 1);
 
 		pin->enable_count++;
 	} else {
@@ -2011,8 +2008,7 @@ static int regulator_ena_gpio_ctrl(struct regulator_dev *rdev, bool enable)
 
 		/* Disable GPIO if not used */
 		if (pin->enable_count <= 1) {
-			gpiod_set_value_cansleep(pin->gpiod,
-						 pin->ena_gpio_invert);
+			gpiod_set_value_cansleep(pin->gpiod, 0);
 			pin->enable_count = 0;
 		}
 	}
diff --git a/drivers/regulator/da9055-regulator.c b/drivers/regulator/da9055-regulator.c
index f40c3b8644ae..1a384258d0e5 100644
--- a/drivers/regulator/da9055-regulator.c
+++ b/drivers/regulator/da9055-regulator.c
@@ -457,7 +457,6 @@ static int da9055_gpio_init(struct da9055_regulator *regulator,
 		int gpio_mux = pdata->gpio_ren[id];
 
 		config->ena_gpiod = pdata->ena_gpiods[id];
-		config->ena_gpio_invert = 1;
 
 		/*
 		 * GPI pin is muxed with regulator to control the
diff --git a/drivers/regulator/fixed.c b/drivers/regulator/fixed.c
index 1142f195529b..8c479cdb69a9 100644
--- a/drivers/regulator/fixed.c
+++ b/drivers/regulator/fixed.c
@@ -79,10 +79,6 @@ of_get_fixed_voltage_config(struct device *dev,
 
 	of_property_read_u32(np, "startup-delay-us", &config->startup_delay);
 
-	config->enable_high = of_property_read_bool(np, "enable-active-high");
-	config->gpio_is_open_drain = of_property_read_bool(np,
-							   "gpio-open-drain");
-
 	if (of_find_property(np, "vin-supply", NULL))
 		config->input_supply = "vin";
 
@@ -146,24 +142,14 @@ static int reg_fixed_voltage_probe(struct platform_device *pdev)
 
 	drvdata->desc.fixed_uV = config->microvolts;
 
-	cfg.ena_gpio_invert = !config->enable_high;
-	if (config->enabled_at_boot) {
-		if (config->enable_high)
-			gflags = GPIOD_OUT_HIGH;
-		else
-			gflags = GPIOD_OUT_LOW;
-	} else {
-		if (config->enable_high)
-			gflags = GPIOD_OUT_LOW;
-		else
-			gflags = GPIOD_OUT_HIGH;
-	}
-	if (config->gpio_is_open_drain) {
-		if (gflags == GPIOD_OUT_HIGH)
-			gflags = GPIOD_OUT_HIGH_OPEN_DRAIN;
-		else
-			gflags = GPIOD_OUT_LOW_OPEN_DRAIN;
-	}
+	/*
+	 * The signal will be inverted by the GPIO core if flagged so in the
+	 * decriptor.
+	 */
+	if (config->enabled_at_boot)
+		gflags = GPIOD_OUT_HIGH;
+	else
+		gflags = GPIOD_OUT_LOW;
 
 	cfg.ena_gpiod = devm_gpiod_get_optional(&pdev->dev, NULL, gflags);
 	if (IS_ERR(cfg.ena_gpiod))
diff --git a/drivers/regulator/gpio-regulator.c b/drivers/regulator/gpio-regulator.c
index 172ca4c578b2..fb9563de59fc 100644
--- a/drivers/regulator/gpio-regulator.c
+++ b/drivers/regulator/gpio-regulator.c
@@ -154,9 +154,6 @@ of_get_gpio_regulator_config(struct device *dev, struct device_node *np,
 
 	config->supply_name = config->init_data->constraints.name;
 
-	if (of_property_read_bool(np, "enable-active-high"))
-		config->enable_high = true;
-
 	if (of_property_read_bool(np, "enable-at-boot"))
 		config->enabled_at_boot = true;
 
@@ -338,18 +335,15 @@ static int gpio_regulator_probe(struct platform_device *pdev)
 	cfg.driver_data = drvdata;
 	cfg.of_node = np;
 
-	cfg.ena_gpio_invert = !config->enable_high;
-	if (config->enabled_at_boot) {
-		if (config->enable_high)
-			gflags = GPIOD_OUT_HIGH;
-		else
-			gflags = GPIOD_OUT_LOW;
-	} else {
-		if (config->enable_high)
-			gflags = GPIOD_OUT_LOW;
-		else
-			gflags = GPIOD_OUT_HIGH;
-	}
+	/*
+	 * The signal will be inverted by the GPIO core if flagged so in the
+	 * decriptor.
+	 */
+	if (config->enabled_at_boot)
+		gflags = GPIOD_OUT_HIGH;
+	else
+		gflags = GPIOD_OUT_LOW;
+
 	cfg.ena_gpiod = devm_gpiod_get_optional(&pdev->dev, "enable", gflags);
 	if (IS_ERR(cfg.ena_gpiod)) {
 		ret = PTR_ERR(cfg.ena_gpiod);
diff --git a/include/linux/regulator/fixed.h b/include/linux/regulator/fixed.h
index 1a4340ed8e2b..f10140da7145 100644
--- a/include/linux/regulator/fixed.h
+++ b/include/linux/regulator/fixed.h
@@ -25,14 +25,6 @@ struct regulator_init_data;
  * @input_supply:	Name of the input regulator supply
  * @microvolts:		Output voltage of regulator
  * @startup_delay:	Start-up time in microseconds
- * @gpio_is_open_drain: Gpio pin is open drain or normal type.
- *			If it is open drain type then HIGH will be set
- *			through PULL-UP with setting gpio as input
- *			and low will be set as gpio-output with driven
- *			to low. For non-open-drain case, the gpio will
- *			will be in output and drive to low/high accordingly.
- * @enable_high:	Polarity of enable GPIO
- *			1 = Active high, 0 = Active low
  * @enabled_at_boot:	Whether regulator has been enabled at
  * 			boot or not. 1 = Yes, 0 = No
  * 			This is used to keep the regulator at
@@ -48,8 +40,6 @@ struct fixed_voltage_config {
 	const char *input_supply;
 	int microvolts;
 	unsigned startup_delay;
-	unsigned gpio_is_open_drain:1;
-	unsigned enable_high:1;
 	unsigned enabled_at_boot:1;
 	struct regulator_init_data *init_data;
 };
diff --git a/include/linux/regulator/gpio-regulator.h b/include/linux/regulator/gpio-regulator.h
index 536cab86f2d5..4f3cc1a73ade 100644
--- a/include/linux/regulator/gpio-regulator.h
+++ b/include/linux/regulator/gpio-regulator.h
@@ -44,8 +44,6 @@ struct gpio_regulator_state {
 /**
  * struct gpio_regulator_config - config structure
  * @supply_name:	Name of the regulator supply
- * @enable_high:	Polarity of enable GPIO
- *			1 = Active high, 0 = Active low
  * @enabled_at_boot:	Whether regulator has been enabled at
  *			boot or not. 1 = Yes, 0 = No
  *			This is used to keep the regulator at
@@ -67,7 +65,6 @@ struct gpio_regulator_state {
 struct gpio_regulator_config {
 	const char *supply_name;
 
-	unsigned enable_high:1;
 	unsigned enabled_at_boot:1;
 	unsigned startup_delay;
 
-- 
2.14.3

^ permalink raw reply	[flat|nested] 54+ messages in thread

* [PATCH 19/21] regulator: fixed/gpio: Update device tree bindings
  2018-02-12 13:16 [PATCH 00/21] regulator: switch core to GPIO descriptors Linus Walleij
                   ` (17 preceding siblings ...)
  2018-02-12 13:17 ` [PATCH 18/21] regulator: fixed/gpio: Pull inversion/OD into gpiolib Linus Walleij
@ 2018-02-12 13:17 ` Linus Walleij
  2018-02-19  2:41   ` Rob Herring
  2018-02-12 13:17 ` [PATCH 20/21] regulator: gpio: Convert to fully use descriptors Linus Walleij
  2018-02-12 13:17 ` [PATCH 21/21] regulator: gpio: Simplify probe path Linus Walleij
  20 siblings, 1 reply; 54+ messages in thread
From: Linus Walleij @ 2018-02-12 13:17 UTC (permalink / raw)
  To: Liam Girdwood, Mark Brown
  Cc: linux-kernel, linux-gpio, Linus Walleij, devicetree

Deprecate the open drain binding for fixed regulator and indicate
that we prefer this to be passed in the GPIO phandle flags.

Clarify that the line inversion semantics for fixed and GPIO
regulators completely overrides the active low flags in the
phandle flags.

Unfortunately this can not be changed to prefer that we pass
the flags in the phandle: the bindings have been specified and
deployed such that the presence/absence of this flag and only
that controls the line inversion semantics. The crucial semantic
is that the absence of the flag means the core will assume
the line is active low, which in GPIO terms is an exception,
as GPIO lines are normally assumed to be active high.

This special device tree semantic cannot be changed without
introducing a whole new compatible string for the fixed and
GPIO regulators, so we just contain the situation.

Cc: devicetree@vger.kernel.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
 .../devicetree/bindings/regulator/fixed-regulator.txt       | 13 +++++++++++--
 .../devicetree/bindings/regulator/gpio-regulator.txt        |  4 ++++
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/regulator/fixed-regulator.txt b/Documentation/devicetree/bindings/regulator/fixed-regulator.txt
index 4fae41d54798..60ce9cb8f891 100644
--- a/Documentation/devicetree/bindings/regulator/fixed-regulator.txt
+++ b/Documentation/devicetree/bindings/regulator/fixed-regulator.txt
@@ -7,10 +7,19 @@ Optional properties:
 - gpio: gpio to use for enable control
 - startup-delay-us: startup time in microseconds
 - enable-active-high: Polarity of GPIO is Active high
-If this property is missing, the default assumed is Active low.
+  If this property is missing, the default assumed is Active low.
+  If the phandle flags to the GPIO handle also flag the line as active
+  low or high, that will be ignored for fixed regulators and the
+  presence or absence of this flag solely controls the inversion
+  semantics.
+-vin-supply: Input supply name.
+
+Deprecated properties:
 - gpio-open-drain: GPIO is open drain type.
   If this property is missing then default assumption is false.
--vin-supply: Input supply name.
+  Do not use this property in new device trees: instead use the
+  phandle flag to indicate to the GPIO provider that the line
+  should be handled as open drain.
 
 Any property defined as part of the core regulator
 binding, defined in regulator.txt, can also be used.
diff --git a/Documentation/devicetree/bindings/regulator/gpio-regulator.txt b/Documentation/devicetree/bindings/regulator/gpio-regulator.txt
index dd1ed789728e..06f5cb4af052 100644
--- a/Documentation/devicetree/bindings/regulator/gpio-regulator.txt
+++ b/Documentation/devicetree/bindings/regulator/gpio-regulator.txt
@@ -12,6 +12,10 @@ Optional properties:
 			  defualt is LOW if nothing is specified.
 - startup-delay-us	: Startup time in microseconds.
 - enable-active-high	: Polarity of GPIO is active high (default is low).
+			  If the phandle flags to the GPIO handle also flag the line as
+			  active low or high, that will be ignored for fixed regulators
+			  and the presence or absence of this flag solely controls the
+			  inversion semantics.
 - regulator-type	: Specifies what is being regulated, must be either
 			  "voltage" or "current", defaults to voltage.
 
-- 
2.14.3

^ permalink raw reply	[flat|nested] 54+ messages in thread

* [PATCH 20/21] regulator: gpio: Convert to fully use descriptors
  2018-02-12 13:16 [PATCH 00/21] regulator: switch core to GPIO descriptors Linus Walleij
                   ` (18 preceding siblings ...)
  2018-02-12 13:17 ` [PATCH 19/21] regulator: fixed/gpio: Update device tree bindings Linus Walleij
@ 2018-02-12 13:17 ` Linus Walleij
  2018-02-12 13:17 ` [PATCH 21/21] regulator: gpio: Simplify probe path Linus Walleij
  20 siblings, 0 replies; 54+ messages in thread
From: Linus Walleij @ 2018-02-12 13:17 UTC (permalink / raw)
  To: Liam Girdwood, Mark Brown; +Cc: linux-kernel, linux-gpio, Linus Walleij

This converts the GPIO regulator driver to use decriptors only.
We have to let go of the array gpio handling: the fetched descriptors
are handled individually anyway, and the array retrieveal function
does not make it possible to retrieve each GPIO descriptor with
unique flags. Instead get them one by one.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
 arch/arm/mach-pxa/hx4700.c               |  10 +--
 arch/arm/mach-pxa/magician.c             |  11 +--
 drivers/regulator/gpio-regulator.c       | 116 +++++++++++--------------------
 include/linux/regulator/gpio-regulator.h |  12 ++--
 4 files changed, 58 insertions(+), 91 deletions(-)

diff --git a/arch/arm/mach-pxa/hx4700.c b/arch/arm/mach-pxa/hx4700.c
index 05148016c620..24ba230340d8 100644
--- a/arch/arm/mach-pxa/hx4700.c
+++ b/arch/arm/mach-pxa/hx4700.c
@@ -700,9 +700,7 @@ static struct regulator_init_data bq24022_init_data = {
 	.consumer_supplies      = bq24022_consumers,
 };
 
-static struct gpio bq24022_gpios[] = {
-	{ GPIO96_HX4700_BQ24022_ISET2, GPIOF_OUT_INIT_LOW, "bq24022_iset2" },
-};
+static enum gpiod_flags bq24022_gpiod_gflags[] = { GPIOD_OUT_LOW };
 
 static struct gpio_regulator_state bq24022_states[] = {
 	{ .value = 100000, .gpios = (0 << 0) },
@@ -714,8 +712,8 @@ static struct gpio_regulator_config bq24022_info = {
 
 	.enabled_at_boot = 0,
 
-	.gpios = bq24022_gpios,
-	.nr_gpios = ARRAY_SIZE(bq24022_gpios),
+	.gflags = bq24022_gpiod_gflags,
+	.ngpios = ARRAY_SIZE(bq24022_gpiod_gflags),
 
 	.states = bq24022_states,
 	.nr_states = ARRAY_SIZE(bq24022_states),
@@ -735,6 +733,8 @@ static struct platform_device bq24022 = {
 static struct gpiod_lookup_table bq24022_gpiod_table = {
 	.dev_id = "gpio-regulator",
 	.table = {
+		GPIO_LOOKUP("gpio-pxa", GPIO96_HX4700_BQ24022_ISET2,
+			    NULL, GPIO_ACTIVE_HIGH),
 		GPIO_LOOKUP("gpio-pxa", GPIO72_HX4700_BQ24022_nCHARGE_EN,
 			    "enable", GPIO_ACTIVE_LOW),
 		{ },
diff --git a/arch/arm/mach-pxa/magician.c b/arch/arm/mach-pxa/magician.c
index fab63c52d50e..5d21de79135b 100644
--- a/arch/arm/mach-pxa/magician.c
+++ b/arch/arm/mach-pxa/magician.c
@@ -645,9 +645,8 @@ static struct regulator_init_data bq24022_init_data = {
 	.consumer_supplies	= bq24022_consumers,
 };
 
-static struct gpio bq24022_gpios[] = {
-	{ EGPIO_MAGICIAN_BQ24022_ISET2, GPIOF_OUT_INIT_LOW, "bq24022_iset2" },
-};
+
+static enum gpiod_flags bq24022_gpiod_gflags[] = { GPIOD_OUT_LOW };
 
 static struct gpio_regulator_state bq24022_states[] = {
 	{ .value = 100000, .gpios = (0 << 0) },
@@ -659,8 +658,8 @@ static struct gpio_regulator_config bq24022_info = {
 
 	.enabled_at_boot	= 1,
 
-	.gpios			= bq24022_gpios,
-	.nr_gpios		= ARRAY_SIZE(bq24022_gpios),
+	.gflags = bq24022_gpiod_gflags,
+	.ngpios = ARRAY_SIZE(bq24022_gpiod_gflags),
 
 	.states			= bq24022_states,
 	.nr_states		= ARRAY_SIZE(bq24022_states),
@@ -680,6 +679,8 @@ static struct platform_device bq24022 = {
 static struct gpiod_lookup_table bq24022_gpiod_table = {
 	.dev_id = "gpio-regulator",
 	.table = {
+		GPIO_LOOKUP("gpio-pxa", EGPIO_MAGICIAN_BQ24022_ISET2,
+			    NULL, GPIO_ACTIVE_HIGH),
 		GPIO_LOOKUP("gpio-pxa", GPIO30_MAGICIAN_BQ24022_nCHARGE_EN,
 			    "enable", GPIO_ACTIVE_LOW),
 		{ },
diff --git a/drivers/regulator/gpio-regulator.c b/drivers/regulator/gpio-regulator.c
index fb9563de59fc..aecdd3f211ba 100644
--- a/drivers/regulator/gpio-regulator.c
+++ b/drivers/regulator/gpio-regulator.c
@@ -30,17 +30,15 @@
 #include <linux/regulator/machine.h>
 #include <linux/regulator/of_regulator.h>
 #include <linux/regulator/gpio-regulator.h>
-#include <linux/gpio.h>
 #include <linux/gpio/consumer.h>
 #include <linux/slab.h>
 #include <linux/of.h>
-#include <linux/of_gpio.h>
 
 struct gpio_regulator_data {
 	struct regulator_desc desc;
 	struct regulator_dev *dev;
 
-	struct gpio *gpios;
+	struct gpio_desc **gpiods;
 	int nr_gpios;
 
 	struct gpio_regulator_state *states;
@@ -83,7 +81,7 @@ static int gpio_regulator_set_voltage(struct regulator_dev *dev,
 
 	for (ptr = 0; ptr < data->nr_gpios; ptr++) {
 		state = (target & (1 << ptr)) >> ptr;
-		gpio_set_value_cansleep(data->gpios[ptr].gpio, state);
+		gpiod_set_value_cansleep(data->gpiods[ptr], state);
 	}
 	data->state = target;
 
@@ -120,7 +118,7 @@ static int gpio_regulator_set_current_limit(struct regulator_dev *dev,
 
 	for (ptr = 0; ptr < data->nr_gpios; ptr++) {
 		state = (target & (1 << ptr)) >> ptr;
-		gpio_set_value_cansleep(data->gpios[ptr].gpio, state);
+		gpiod_set_value_cansleep(data->gpiods[ptr], state);
 	}
 	data->state = target;
 
@@ -139,7 +137,8 @@ of_get_gpio_regulator_config(struct device *dev, struct device_node *np,
 {
 	struct gpio_regulator_config *config;
 	const char *regtype;
-	int proplen, gpio, i;
+	int proplen, i;
+	int ngpios;
 	int ret;
 
 	config = devm_kzalloc(dev,
@@ -159,46 +158,31 @@ of_get_gpio_regulator_config(struct device *dev, struct device_node *np,
 
 	of_property_read_u32(np, "startup-delay-us", &config->startup_delay);
 
-	/* Fetch GPIOs. - optional property*/
-	ret = of_gpio_count(np);
-	if ((ret < 0) && (ret != -ENOENT))
-		return ERR_PTR(ret);
-
-	if (ret > 0) {
-		config->nr_gpios = ret;
-		config->gpios = devm_kzalloc(dev,
-					sizeof(struct gpio) * config->nr_gpios,
-					GFP_KERNEL);
-		if (!config->gpios)
+	/* Fetch GPIO init levels */
+	ngpios = gpiod_count(dev, NULL);
+	if (ngpios > 0) {
+		config->gflags = devm_kzalloc(dev,
+					      sizeof(enum gpiod_flags)
+					      * ngpios,
+					      GFP_KERNEL);
+		if (!config->gflags)
 			return ERR_PTR(-ENOMEM);
 
-		proplen = of_property_count_u32_elems(np, "gpios-states");
-		/* optional property */
-		if (proplen < 0)
-			proplen = 0;
+		for (i = 0; i < ngpios; i++) {
+			u32 val;
 
-		if (proplen > 0 && proplen != config->nr_gpios) {
-			dev_warn(dev, "gpios <-> gpios-states mismatch\n");
-			proplen = 0;
-		}
+			ret = of_property_read_u32_index(np, "gpios-states", i,
+							 &val);
 
-		for (i = 0; i < config->nr_gpios; i++) {
-			gpio = of_get_named_gpio(np, "gpios", i);
-			if (gpio < 0) {
-				if (gpio != -ENOENT)
-					return ERR_PTR(gpio);
-				break;
-			}
-			config->gpios[i].gpio = gpio;
-			if (proplen > 0) {
-				of_property_read_u32_index(np, "gpios-states",
-							   i, &ret);
-				if (ret)
-					config->gpios[i].flags =
-							   GPIOF_OUT_INIT_HIGH;
-			}
+			/* Default to high per specification */
+			if (ret)
+				config->gflags[i] = GPIOD_OUT_HIGH;
+			else
+				config->gflags[i] =
+					val ? GPIOD_OUT_HIGH : GPIOD_OUT_LOW;
 		}
 	}
+	config->ngpios = ngpios;
 
 	/* Fetch states. */
 	proplen = of_property_count_u32_elems(np, "states");
@@ -249,7 +233,7 @@ static int gpio_regulator_probe(struct platform_device *pdev)
 	struct gpio_regulator_data *drvdata;
 	struct regulator_config cfg = { };
 	enum gpiod_flags gflags;
-	int ptr, ret, state;
+	int ptr, ret, state, i;
 
 	drvdata = devm_kzalloc(&pdev->dev, sizeof(struct gpio_regulator_data),
 			       GFP_KERNEL);
@@ -263,6 +247,16 @@ static int gpio_regulator_probe(struct platform_device *pdev)
 			return PTR_ERR(config);
 	}
 
+	for (i = 0; i < config->ngpios; i++) {
+		drvdata->gpiods[i] = devm_gpiod_get_index(&pdev->dev,
+							  NULL,
+							  i,
+							  config->gflags[i]);
+		if (IS_ERR(drvdata->gpiods[i]))
+			return PTR_ERR(drvdata->gpiods[i]);
+	}
+	drvdata->nr_gpios = config->ngpios;
+
 	drvdata->desc.name = kstrdup(config->supply_name, GFP_KERNEL);
 	if (drvdata->desc.name == NULL) {
 		dev_err(&pdev->dev, "Failed to allocate supply name\n");
@@ -270,27 +264,6 @@ static int gpio_regulator_probe(struct platform_device *pdev)
 		goto err;
 	}
 
-	if (config->nr_gpios != 0) {
-		drvdata->gpios = kmemdup(config->gpios,
-					 config->nr_gpios * sizeof(struct gpio),
-					 GFP_KERNEL);
-		if (drvdata->gpios == NULL) {
-			dev_err(&pdev->dev, "Failed to allocate gpio data\n");
-			ret = -ENOMEM;
-			goto err_name;
-		}
-
-		drvdata->nr_gpios = config->nr_gpios;
-		ret = gpio_request_array(drvdata->gpios, drvdata->nr_gpios);
-		if (ret) {
-			if (ret != -EPROBE_DEFER)
-				dev_err(&pdev->dev,
-					"Could not obtain regulator setting GPIOs: %d\n",
-					ret);
-			goto err_memstate;
-		}
-	}
-
 	drvdata->states = kmemdup(config->states,
 				  config->nr_states *
 					 sizeof(struct gpio_regulator_state),
@@ -298,7 +271,7 @@ static int gpio_regulator_probe(struct platform_device *pdev)
 	if (drvdata->states == NULL) {
 		dev_err(&pdev->dev, "Failed to allocate state data\n");
 		ret = -ENOMEM;
-		goto err_memgpio;
+		goto err_name;
 	}
 	drvdata->nr_states = config->nr_states;
 
@@ -319,13 +292,13 @@ static int gpio_regulator_probe(struct platform_device *pdev)
 	default:
 		dev_err(&pdev->dev, "No regulator type set\n");
 		ret = -EINVAL;
-		goto err_memgpio;
+		goto err_memstate;
 	}
 
 	/* build initial state from gpio init data. */
 	state = 0;
 	for (ptr = 0; ptr < drvdata->nr_gpios; ptr++) {
-		if (config->gpios[ptr].flags & GPIOF_OUT_INIT_HIGH)
+		if (config->gflags[ptr] == GPIOD_OUT_HIGH)
 			state |= (1 << ptr);
 	}
 	drvdata->state = state;
@@ -347,26 +320,22 @@ static int gpio_regulator_probe(struct platform_device *pdev)
 	cfg.ena_gpiod = devm_gpiod_get_optional(&pdev->dev, "enable", gflags);
 	if (IS_ERR(cfg.ena_gpiod)) {
 		ret = PTR_ERR(cfg.ena_gpiod);
-		goto err_stategpio;
+		goto err_memstate;
 	}
 
 	drvdata->dev = regulator_register(&drvdata->desc, &cfg);
 	if (IS_ERR(drvdata->dev)) {
 		ret = PTR_ERR(drvdata->dev);
 		dev_err(&pdev->dev, "Failed to register regulator: %d\n", ret);
-		goto err_stategpio;
+		goto err_memstate;
 	}
 
 	platform_set_drvdata(pdev, drvdata);
 
 	return 0;
 
-err_stategpio:
-	gpio_free_array(drvdata->gpios, drvdata->nr_gpios);
 err_memstate:
 	kfree(drvdata->states);
-err_memgpio:
-	kfree(drvdata->gpios);
 err_name:
 	kfree(drvdata->desc.name);
 err:
@@ -378,12 +347,7 @@ static int gpio_regulator_remove(struct platform_device *pdev)
 	struct gpio_regulator_data *drvdata = platform_get_drvdata(pdev);
 
 	regulator_unregister(drvdata->dev);
-
-	gpio_free_array(drvdata->gpios, drvdata->nr_gpios);
-
 	kfree(drvdata->states);
-	kfree(drvdata->gpios);
-
 	kfree(drvdata->desc.name);
 
 	return 0;
diff --git a/include/linux/regulator/gpio-regulator.h b/include/linux/regulator/gpio-regulator.h
index 4f3cc1a73ade..11cd6375215d 100644
--- a/include/linux/regulator/gpio-regulator.h
+++ b/include/linux/regulator/gpio-regulator.h
@@ -21,6 +21,8 @@
 #ifndef __REGULATOR_GPIO_H
 #define __REGULATOR_GPIO_H
 
+#include <linux/gpio/consumer.h>
+
 struct regulator_init_data;
 
 enum regulator_type;
@@ -49,9 +51,9 @@ struct gpio_regulator_state {
  *			This is used to keep the regulator at
  *			the default state
  * @startup_delay:	Start-up time in microseconds
- * @gpios:		Array containing the gpios needed to control
- *			the setting of the regulator
- * @nr_gpios:		Number of gpios
+ * @gflags:		Array of GPIO configuration flags for initial
+ *			states
+ * @ngpios:		Number of GPIOs and configurations available
  * @states:		Array of gpio_regulator_state entries describing
  *			the gpio state for specific voltages
  * @nr_states:		Number of states available
@@ -68,8 +70,8 @@ struct gpio_regulator_config {
 	unsigned enabled_at_boot:1;
 	unsigned startup_delay;
 
-	struct gpio *gpios;
-	int nr_gpios;
+	enum gpiod_flags *gflags;
+	int ngpios;
 
 	struct gpio_regulator_state *states;
 	int nr_states;
-- 
2.14.3

^ permalink raw reply	[flat|nested] 54+ messages in thread

* [PATCH 21/21] regulator: gpio: Simplify probe path
  2018-02-12 13:16 [PATCH 00/21] regulator: switch core to GPIO descriptors Linus Walleij
                   ` (19 preceding siblings ...)
  2018-02-12 13:17 ` [PATCH 20/21] regulator: gpio: Convert to fully use descriptors Linus Walleij
@ 2018-02-12 13:17 ` Linus Walleij
  20 siblings, 0 replies; 54+ messages in thread
From: Linus Walleij @ 2018-02-12 13:17 UTC (permalink / raw)
  To: Liam Girdwood, Mark Brown; +Cc: linux-kernel, linux-gpio, Linus Walleij

Use devm_* managed device resources and create a local
struct device *dev variable to simplify the code inside
probe().

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
 drivers/regulator/gpio-regulator.c | 60 +++++++++++++++-----------------------
 1 file changed, 24 insertions(+), 36 deletions(-)

diff --git a/drivers/regulator/gpio-regulator.c b/drivers/regulator/gpio-regulator.c
index aecdd3f211ba..38a283252aaf 100644
--- a/drivers/regulator/gpio-regulator.c
+++ b/drivers/regulator/gpio-regulator.c
@@ -228,27 +228,28 @@ static struct regulator_ops gpio_regulator_current_ops = {
 
 static int gpio_regulator_probe(struct platform_device *pdev)
 {
-	struct gpio_regulator_config *config = dev_get_platdata(&pdev->dev);
-	struct device_node *np = pdev->dev.of_node;
+	struct device *dev = &pdev->dev;
+	struct gpio_regulator_config *config = dev_get_platdata(dev);
+	struct device_node *np = dev->of_node;
 	struct gpio_regulator_data *drvdata;
 	struct regulator_config cfg = { };
 	enum gpiod_flags gflags;
 	int ptr, ret, state, i;
 
-	drvdata = devm_kzalloc(&pdev->dev, sizeof(struct gpio_regulator_data),
+	drvdata = devm_kzalloc(dev, sizeof(struct gpio_regulator_data),
 			       GFP_KERNEL);
 	if (drvdata == NULL)
 		return -ENOMEM;
 
 	if (np) {
-		config = of_get_gpio_regulator_config(&pdev->dev, np,
+		config = of_get_gpio_regulator_config(dev, np,
 						      &drvdata->desc);
 		if (IS_ERR(config))
 			return PTR_ERR(config);
 	}
 
 	for (i = 0; i < config->ngpios; i++) {
-		drvdata->gpiods[i] = devm_gpiod_get_index(&pdev->dev,
+		drvdata->gpiods[i] = devm_gpiod_get_index(dev,
 							  NULL,
 							  i,
 							  config->gflags[i]);
@@ -257,21 +258,20 @@ static int gpio_regulator_probe(struct platform_device *pdev)
 	}
 	drvdata->nr_gpios = config->ngpios;
 
-	drvdata->desc.name = kstrdup(config->supply_name, GFP_KERNEL);
+	drvdata->desc.name = devm_kstrdup(dev, config->supply_name, GFP_KERNEL);
 	if (drvdata->desc.name == NULL) {
-		dev_err(&pdev->dev, "Failed to allocate supply name\n");
-		ret = -ENOMEM;
-		goto err;
+		dev_err(dev, "Failed to allocate supply name\n");
+		return -ENOMEM;
 	}
 
-	drvdata->states = kmemdup(config->states,
-				  config->nr_states *
-					 sizeof(struct gpio_regulator_state),
-				  GFP_KERNEL);
+	drvdata->states = devm_kmemdup(dev,
+				       config->states,
+				       config->nr_states *
+				       sizeof(struct gpio_regulator_state),
+				       GFP_KERNEL);
 	if (drvdata->states == NULL) {
-		dev_err(&pdev->dev, "Failed to allocate state data\n");
-		ret = -ENOMEM;
-		goto err_name;
+		dev_err(dev, "Failed to allocate state data\n");
+		return -ENOMEM;
 	}
 	drvdata->nr_states = config->nr_states;
 
@@ -290,9 +290,8 @@ static int gpio_regulator_probe(struct platform_device *pdev)
 		drvdata->desc.ops = &gpio_regulator_current_ops;
 		break;
 	default:
-		dev_err(&pdev->dev, "No regulator type set\n");
-		ret = -EINVAL;
-		goto err_memstate;
+		dev_err(dev, "No regulator type set\n");
+		return -EINVAL;
 	}
 
 	/* build initial state from gpio init data. */
@@ -303,7 +302,7 @@ static int gpio_regulator_probe(struct platform_device *pdev)
 	}
 	drvdata->state = state;
 
-	cfg.dev = &pdev->dev;
+	cfg.dev = dev;
 	cfg.init_data = config->init_data;
 	cfg.driver_data = drvdata;
 	cfg.of_node = np;
@@ -317,29 +316,20 @@ static int gpio_regulator_probe(struct platform_device *pdev)
 	else
 		gflags = GPIOD_OUT_LOW;
 
-	cfg.ena_gpiod = devm_gpiod_get_optional(&pdev->dev, "enable", gflags);
-	if (IS_ERR(cfg.ena_gpiod)) {
-		ret = PTR_ERR(cfg.ena_gpiod);
-		goto err_memstate;
-	}
+	cfg.ena_gpiod = devm_gpiod_get_optional(dev, "enable", gflags);
+	if (IS_ERR(cfg.ena_gpiod))
+		return PTR_ERR(cfg.ena_gpiod);
 
 	drvdata->dev = regulator_register(&drvdata->desc, &cfg);
 	if (IS_ERR(drvdata->dev)) {
 		ret = PTR_ERR(drvdata->dev);
-		dev_err(&pdev->dev, "Failed to register regulator: %d\n", ret);
-		goto err_memstate;
+		dev_err(dev, "Failed to register regulator: %d\n", ret);
+		return ret;
 	}
 
 	platform_set_drvdata(pdev, drvdata);
 
 	return 0;
-
-err_memstate:
-	kfree(drvdata->states);
-err_name:
-	kfree(drvdata->desc.name);
-err:
-	return ret;
 }
 
 static int gpio_regulator_remove(struct platform_device *pdev)
@@ -347,8 +337,6 @@ static int gpio_regulator_remove(struct platform_device *pdev)
 	struct gpio_regulator_data *drvdata = platform_get_drvdata(pdev);
 
 	regulator_unregister(drvdata->dev);
-	kfree(drvdata->states);
-	kfree(drvdata->desc.name);
 
 	return 0;
 }
-- 
2.14.3

^ permalink raw reply	[flat|nested] 54+ messages in thread

* Re: [PATCH 08/21] regulator: max77686: Pass descriptor instead of GPIO number
  2018-02-12 13:17 ` [PATCH 08/21] regulator: max77686: Pass descriptor instead of GPIO number Linus Walleij
@ 2018-02-12 13:37   ` Krzysztof Kozlowski
  0 siblings, 0 replies; 54+ messages in thread
From: Krzysztof Kozlowski @ 2018-02-12 13:37 UTC (permalink / raw)
  To: Linus Walleij
  Cc: Liam Girdwood, Mark Brown, linux-kernel, linux-gpio,
	Chanwoo Choi, Bartlomiej Zolnierkiewicz

On Mon, Feb 12, 2018 at 2:17 PM, Linus Walleij <linus.walleij@linaro.org> wrote:
> Instead of passing a global GPIO number, pass a descriptor looked
> up from the device tree configuration node.
>
> Cc: Chanwoo Choi <cw00.choi@samsung.com>
> Cc: Krzysztof Kozlowski <krzk@kernel.org>
> Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
> ---
>  drivers/regulator/max77686-regulator.c | 19 ++++++++++++-------
>  1 file changed, 12 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/regulator/max77686-regulator.c b/drivers/regulator/max77686-regulator.c
> index c301f3733475..5ebd06f47e6a 100644
> --- a/drivers/regulator/max77686-regulator.c
> +++ b/drivers/regulator/max77686-regulator.c
> @@ -25,8 +25,7 @@
>  #include <linux/kernel.h>
>  #include <linux/bug.h>
>  #include <linux/err.h>
> -#include <linux/gpio.h>
> -#include <linux/of_gpio.h>
> +#include <linux/gpio/consumer.h>
>  #include <linux/slab.h>
>  #include <linux/platform_device.h>
>  #include <linux/regulator/driver.h>
> @@ -90,6 +89,7 @@ enum max77686_ramp_rate {
>  };
>
>  struct max77686_data {
> +       struct device *dev;
>         DECLARE_BITMAP(gpio_enabled, MAX77686_REGULATORS);
>
>         /* Array indexed by regulator id */
> @@ -269,16 +269,20 @@ static int max77686_of_parse_cb(struct device_node *np,
>         case MAX77686_BUCK8:
>         case MAX77686_BUCK9:
>         case MAX77686_LDO20 ... MAX77686_LDO22:
> -               config->ena_gpio = of_get_named_gpio(np,
> -                                       "maxim,ena-gpios", 0);
> -               config->ena_gpio_flags = GPIOF_OUT_INIT_HIGH;
> -               config->ena_gpio_initialized = true;
> +               config->ena_gpiod = devm_gpiod_get_from_of_node(max77686->dev,
> +                                                               np,
> +                                                               "maxim,ena",
> +                                                               0,
> +                                                               GPIOD_OUT_HIGH,
> +                                                               "max77686-LDO");

This is also for bucks so how about naming it "max77686-regulator"?

> +               if (IS_ERR(config->ena_gpiod))
> +                       return PTR_ERR(config->ena_gpiod);

This is not equivalent (although I did not look at previous patches in
the series). In case of of_get_named_gpio() failure, old code would
just set ena_gpio to invalid value and the ena-gpio method would not
be used. All other init data from Device Tree would be parsed.

In new code, failure of devm_gpiod_get_from_of_node() would cause
error of entire regulator_of_get_init_data() therefore using default
driver's init data.

This is not a huge difference in practice because both are result of
bad DT. However discarding entire init data on one property error
seems quite drastic.
On the other hand, what would happen on PROBE_DEFER?

Best regards,
Krzysztof

>                 break;
>         default:
>                 return 0;
>         }
>
> -       if (gpio_is_valid(config->ena_gpio)) {
> +       if (config->ena_gpiod) {
>                 set_bit(desc->id, max77686->gpio_enabled);
>
>                 return regmap_update_bits(config->regmap, desc->enable_reg,
> @@ -521,6 +525,7 @@ static int max77686_pmic_probe(struct platform_device *pdev)
>         if (!max77686)
>                 return -ENOMEM;
>
> +       max77686->dev = &pdev->dev;
>         config.dev = iodev->dev;
>         config.regmap = iodev->regmap;
>         config.driver_data = max77686;
> --
> 2.14.3
>

^ permalink raw reply	[flat|nested] 54+ messages in thread

* Re: [PATCH 16/21] regulator: wm8994: Pass descriptor instead of GPIO number
  2018-02-12 13:17 ` [PATCH 16/21] regulator: wm8994: Pass descriptor instead of GPIO number Linus Walleij
@ 2018-02-12 14:58   ` Lee Jones
  2018-02-13 11:11   ` Charles Keepax
  2018-02-13 11:52   ` [PATCH 16/21] regulator: wm8994: Pass descriptor instead of GPIO number Charles Keepax
  2 siblings, 0 replies; 54+ messages in thread
From: Lee Jones @ 2018-02-12 14:58 UTC (permalink / raw)
  To: Linus Walleij
  Cc: Liam Girdwood, Mark Brown, linux-kernel, linux-gpio, patches,
	Charles Keepax

On Mon, 12 Feb 2018, Linus Walleij wrote:

> Instead of passing a global GPIO number for the enable GPIO, pass
> a descriptor looked up from the device tree node or the board file
> decriptor table for the regulator.
> 
> There is a single board file passing the GPIOs for LDO1 and LDO2
> through platform data, so augment this to pass descriptors
> associated with the i2c device as well.
> 
> Cc: patches@opensource.cirrus.com
> Cc: Charles Keepax <ckeepax@opensource.cirrus.com>
> Cc: Lee Jones <lee.jones@linaro.org>
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
> ---
> Lee: this patch is touching the MFD core driver for WM8994,
> but as with all other patches we just change the regulator
> parts. Would be nice if you could ACK it.

Fine, but any sign of a conflict and I'll need a PR.

Acked-by: Lee Jones <lee.jones@linaro.org>

-- 
Lee Jones
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

^ permalink raw reply	[flat|nested] 54+ messages in thread

* Re: [PATCH 15/21] regulator: tps65090: Pass descriptor instead of GPIO number
  2018-02-12 13:17 ` [PATCH 15/21] regulator: tps65090: Pass descriptor instead of GPIO number Linus Walleij
@ 2018-02-12 14:58   ` Lee Jones
  2018-05-24 19:13   ` Applied "regulator: tps65090: Pass descriptor instead of GPIO number" to the regulator tree Mark Brown
  1 sibling, 0 replies; 54+ messages in thread
From: Lee Jones @ 2018-02-12 14:58 UTC (permalink / raw)
  To: Linus Walleij; +Cc: Liam Girdwood, Mark Brown, linux-kernel, linux-gpio

On Mon, 12 Feb 2018, Linus Walleij wrote:

> Instead of passing a global GPIO number for the enable GPIO, pass
> a descriptor looked up from the device tree node for the
> regulator.
> 
> This regulator supports passing platform data, but enable/sleep
> regulators are looked up from the device tree exclusively, so
> we can need not touch other files.
> 
> Cc: Lee Jones <lee.jones@linaro.org>
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
> ---
> Lee: it would be nice if you could ACK this smallish patch to
> the MFD header.

Fine, but any sign of a conflict and I'll need a PR.

Acked-by: Lee Jones <lee.jones@linaro.org>

> ---
>  drivers/regulator/tps65090-regulator.c | 50 ++++++++++++++++------------------
>  include/linux/mfd/tps65090.h           |  8 ++++--
>  2 files changed, 28 insertions(+), 30 deletions(-)
> 
> diff --git a/drivers/regulator/tps65090-regulator.c b/drivers/regulator/tps65090-regulator.c
> index 395f35dc8cdb..2d398fa3b720 100644
> --- a/drivers/regulator/tps65090-regulator.c
> +++ b/drivers/regulator/tps65090-regulator.c
> @@ -19,8 +19,8 @@
>  #include <linux/module.h>
>  #include <linux/delay.h>
>  #include <linux/init.h>
> -#include <linux/gpio.h>
> -#include <linux/of_gpio.h>
> +#include <linux/of.h>
> +#include <linux/gpio/consumer.h>
>  #include <linux/slab.h>
>  #include <linux/err.h>
>  #include <linux/platform_device.h>
> @@ -300,26 +300,6 @@ static int tps65090_regulator_disable_ext_control(
>  	return tps65090_config_ext_control(ri, false);
>  }
>  
> -static void tps65090_configure_regulator_config(
> -		struct tps65090_regulator_plat_data *tps_pdata,
> -		struct regulator_config *config)
> -{
> -	if (gpio_is_valid(tps_pdata->gpio)) {
> -		int gpio_flag = GPIOF_OUT_INIT_LOW;
> -
> -		if (tps_pdata->reg_init_data->constraints.always_on ||
> -				tps_pdata->reg_init_data->constraints.boot_on)
> -			gpio_flag = GPIOF_OUT_INIT_HIGH;
> -
> -		config->ena_gpio = tps_pdata->gpio;
> -		config->ena_gpio_initialized = true;
> -		config->ena_gpio_flags = gpio_flag;
> -	} else {
> -		config->ena_gpio = -EINVAL;
> -		config->ena_gpio_initialized = false;
> -	}
> -}
> -
>  #ifdef CONFIG_OF
>  static struct of_regulator_match tps65090_matches[] = {
>  	{ .name = "dcdc1", },
> @@ -385,9 +365,26 @@ static struct tps65090_platform_data *tps65090_parse_dt_reg_data(
>  		rpdata->enable_ext_control = of_property_read_bool(
>  					tps65090_matches[idx].of_node,
>  					"ti,enable-ext-control");
> -		if (rpdata->enable_ext_control)
> -			rpdata->gpio = of_get_named_gpio(np,
> -					"dcdc-ext-control-gpios", 0);
> +		if (rpdata->enable_ext_control) {
> +			enum gpiod_flags gflags;
> +
> +			if (ri_data->constraints.always_on ||
> +			    ri_data->constraints.boot_on)
> +				gflags = GPIOD_OUT_HIGH;
> +			else
> +				gflags = GPIOD_OUT_LOW;
> +
> +			rpdata->gpiod = devm_gpiod_get_from_of_node(&pdev->dev,
> +								    tps65090_matches[idx].of_node,
> +								    "dcdc-ext-control-gpios", 0,
> +								    gflags,
> +								    "tps65090");
> +			if (IS_ERR(rpdata->gpiod))
> +				return ERR_CAST(rpdata->gpiod);
> +			if (!rpdata->gpiod)
> +				dev_err(&pdev->dev,
> +					"could not find DCDC external control GPIO\n");
> +		}
>  
>  		if (of_property_read_u32(tps65090_matches[idx].of_node,
>  					 "ti,overcurrent-wait",
> @@ -455,8 +452,7 @@ static int tps65090_regulator_probe(struct platform_device *pdev)
>  		 */
>  		if (tps_pdata && is_dcdc(num) && tps_pdata->reg_init_data) {
>  			if (tps_pdata->enable_ext_control) {
> -				tps65090_configure_regulator_config(
> -						tps_pdata, &config);
> +				config.ena_gpiod = tps_pdata->gpiod;
>  				ri->desc->ops = &tps65090_ext_control_ops;
>  			} else {
>  				ret = tps65090_regulator_disable_ext_control(
> diff --git a/include/linux/mfd/tps65090.h b/include/linux/mfd/tps65090.h
> index 67d144b3b8f9..f05bf4a146e2 100644
> --- a/include/linux/mfd/tps65090.h
> +++ b/include/linux/mfd/tps65090.h
> @@ -83,6 +83,8 @@ enum {
>  #define TPS65090_MAX_REG	TPS65090_REG_AD_OUT2
>  #define TPS65090_NUM_REGS	(TPS65090_MAX_REG + 1)
>  
> +struct gpio_desc;
> +
>  struct tps65090 {
>  	struct device		*dev;
>  	struct regmap		*rmap;
> @@ -95,8 +97,8 @@ struct tps65090 {
>   * @reg_init_data: The regulator init data.
>   * @enable_ext_control: Enable extrenal control or not. Only available for
>   *     DCDC1, DCDC2 and DCDC3.
> - * @gpio: Gpio number if external control is enabled and controlled through
> - *     gpio.
> + * @gpiod: Gpio descriptor if external control is enabled and controlled through
> + *     gpio
>   * @overcurrent_wait_valid: True if the overcurrent_wait should be applied.
>   * @overcurrent_wait: Value to set as the overcurrent wait time.  This is the
>   *     actual bitfield value, not a time in ms (valid value are 0 - 3).
> @@ -104,7 +106,7 @@ struct tps65090 {
>  struct tps65090_regulator_plat_data {
>  	struct regulator_init_data *reg_init_data;
>  	bool enable_ext_control;
> -	int gpio;
> +	struct gpio_desc *gpiod;
>  	bool overcurrent_wait_valid;
>  	int overcurrent_wait;
>  };

-- 
Lee Jones
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

^ permalink raw reply	[flat|nested] 54+ messages in thread

* Re: [PATCH 14/21] regulator: s5m8767: Pass descriptor instead of GPIO number
  2018-02-12 13:17 ` [PATCH 14/21] regulator: s5m8767: Pass descriptor instead of GPIO number Linus Walleij
@ 2018-02-12 14:58   ` Lee Jones
  2018-05-24 19:13   ` Applied "regulator: s5m8767: Pass descriptor instead of GPIO number" to the regulator tree Mark Brown
  1 sibling, 0 replies; 54+ messages in thread
From: Lee Jones @ 2018-02-12 14:58 UTC (permalink / raw)
  To: Linus Walleij; +Cc: Liam Girdwood, Mark Brown, linux-kernel, linux-gpio

On Mon, 12 Feb 2018, Linus Walleij wrote:

> Instead of passing a global GPIO number for the enable GPIO, pass
> a descriptor looked up from the device tree node for the
> regulator.
> 
> This regulator supports passing platform data, but enable/sleep
> regulators are looked up from the device tree exclusively, so
> we can need not touch other files.
> 
> Cc: Lee Jones <lee.jones@linaro.org>
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
> ---
> Lee: would be nice if you could ACK this smallish patch to
> the MFD header.

Fine, but any sign of a conflict and I'll need a PR.

Acked-by: Lee Jones <lee.jones@linaro.org>

> ---
>  drivers/regulator/s5m8767.c      | 26 +++++++++++++++-----------
>  include/linux/mfd/samsung/core.h |  4 +++-
>  2 files changed, 18 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/regulator/s5m8767.c b/drivers/regulator/s5m8767.c
> index 4836947e1521..b8443a360646 100644
> --- a/drivers/regulator/s5m8767.c
> +++ b/drivers/regulator/s5m8767.c
> @@ -13,6 +13,7 @@
>  
>  #include <linux/err.h>
>  #include <linux/of_gpio.h>
> +#include <linux/gpio/consumer.h>
>  #include <linux/module.h>
>  #include <linux/platform_device.h>
>  #include <linux/regulator/driver.h>
> @@ -459,15 +460,14 @@ static void s5m8767_regulator_config_ext_control(struct s5m8767_info *s5m8767,
>  		return;
>  	}
>  
> -	if (!gpio_is_valid(rdata->ext_control_gpio)) {
> +	if (!rdata->ext_control_gpiod) {
>  		dev_warn(s5m8767->dev,
>  				"ext-control for %s: GPIO not valid, ignoring\n",
> -				rdata->reg_node->name);
> +			 rdata->reg_node->name);
>  		return;
>  	}
>  
> -	config->ena_gpio = rdata->ext_control_gpio;
> -	config->ena_gpio_flags = GPIOF_OUT_INIT_HIGH;
> +	config->ena_gpiod = rdata->ext_control_gpiod;
>  }
>  
>  /*
> @@ -577,8 +577,14 @@ static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
>  			continue;
>  		}
>  
> -		rdata->ext_control_gpio = of_get_named_gpio(reg_np,
> -			"s5m8767,pmic-ext-control-gpios", 0);
> +		rdata->ext_control_gpiod = devm_gpiod_get_from_of_node(&pdev->dev,
> +								       reg_np,
> +								       "s5m8767,pmic-ext-control-gpios",
> +								       0,
> +								       GPIOD_OUT_HIGH,
> +								       "s5m8767");
> +		if (IS_ERR(rdata->ext_control_gpiod))
> +			return PTR_ERR(rdata->ext_control_gpiod);
>  
>  		rdata->id = i;
>  		rdata->initdata = of_get_regulator_init_data(
> @@ -954,10 +960,8 @@ static int s5m8767_pmic_probe(struct platform_device *pdev)
>  		config.driver_data = s5m8767;
>  		config.regmap = iodev->regmap_pmic;
>  		config.of_node = pdata->regulators[i].reg_node;
> -		config.ena_gpio = -EINVAL;
> -		config.ena_gpio_flags = 0;
> -		config.ena_gpio_initialized = true;
> -		if (gpio_is_valid(pdata->regulators[i].ext_control_gpio))
> +		config.ena_gpiod = NULL;
> +		if (pdata->regulators[i].ext_control_gpiod)
>  			s5m8767_regulator_config_ext_control(s5m8767,
>  					&pdata->regulators[i], &config);
>  
> @@ -970,7 +974,7 @@ static int s5m8767_pmic_probe(struct platform_device *pdev)
>  			return ret;
>  		}
>  
> -		if (gpio_is_valid(pdata->regulators[i].ext_control_gpio)) {
> +		if (pdata->regulators[i].ext_control_gpiod) {
>  			ret = s5m8767_enable_ext_control(s5m8767, rdev);
>  			if (ret < 0) {
>  				dev_err(s5m8767->dev,
> diff --git a/include/linux/mfd/samsung/core.h b/include/linux/mfd/samsung/core.h
> index 5a23dd4df432..28f4ae76271d 100644
> --- a/include/linux/mfd/samsung/core.h
> +++ b/include/linux/mfd/samsung/core.h
> @@ -39,6 +39,8 @@
>  #define STEP_12_5_MV		12500
>  #define STEP_6_25_MV		6250
>  
> +struct gpio_desc;
> +
>  enum sec_device_type {
>  	S5M8751X,
>  	S5M8763X,
> @@ -151,7 +153,7 @@ struct sec_regulator_data {
>  	int				id;
>  	struct regulator_init_data	*initdata;
>  	struct device_node		*reg_node;
> -	int				ext_control_gpio;
> +	struct gpio_desc		*ext_control_gpiod;
>  };
>  
>  /*

-- 
Lee Jones
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

^ permalink raw reply	[flat|nested] 54+ messages in thread

* Re: [PATCH 10/21] regulator: lp8788-ldo: Pass descriptor instead of GPIO number
  2018-02-12 13:17 ` [PATCH 10/21] regulator: lp8788-ldo: Pass descriptor instead of GPIO number Linus Walleij
@ 2018-02-12 14:59   ` Lee Jones
  2018-05-24 19:14   ` Applied "regulator: lp8788-ldo: Pass descriptor instead of GPIO number" to the regulator tree Mark Brown
  1 sibling, 0 replies; 54+ messages in thread
From: Lee Jones @ 2018-02-12 14:59 UTC (permalink / raw)
  To: Linus Walleij
  Cc: Liam Girdwood, Mark Brown, linux-kernel, linux-gpio, Milo Kim

On Mon, 12 Feb 2018, Linus Walleij wrote:

> Instead of passing a global GPIO number, pass a descriptor looked
> up with the standard devm_gpiod_get_index_optional() call.
> 
> This driver has supported passing a LDO enable GPIO for years,
> yet this facility has never been put to use in the upstream kernel.
> If someone desires to put in place GPIO control for the LDOs,
> this can be done by adding a GPIO descriptor table in the MFD
> nexus in drivers/mfd/lp8788.c for the LDO device when spawning the
> MFD children, or using a board file.
> 
> Cc: Milo Kim <milo.kim@ti.com>
> Cc: Lee Jones <lee.jones@linaro.org>
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
> ---
> Lee: would be nice if you could ACK this smallish patch to
> the MFD header.

Fine, but any sign of a conflict and I'll need a PR.

Acked-by: Lee Jones <lee.jones@linaro.org>

> ---
>  drivers/regulator/lp8788-ldo.c | 32 ++++++++++++++++----------------
>  include/linux/mfd/lp8788.h     | 16 ----------------
>  2 files changed, 16 insertions(+), 32 deletions(-)
> 
> diff --git a/drivers/regulator/lp8788-ldo.c b/drivers/regulator/lp8788-ldo.c
> index cbfd35873575..f2347474a106 100644
> --- a/drivers/regulator/lp8788-ldo.c
> +++ b/drivers/regulator/lp8788-ldo.c
> @@ -16,7 +16,7 @@
>  #include <linux/err.h>
>  #include <linux/platform_device.h>
>  #include <linux/regulator/driver.h>
> -#include <linux/gpio.h>
> +#include <linux/gpio/consumer.h>
>  #include <linux/mfd/lp8788.h>
>  
>  /* register address */
> @@ -85,8 +85,6 @@
>  #define LP8788_STARTUP_TIME_S		3
>  
>  #define ENABLE_TIME_USEC		32
> -#define ENABLE				GPIOF_OUT_INIT_HIGH
> -#define DISABLE				GPIOF_OUT_INIT_LOW
>  
>  enum lp8788_ldo_id {
>  	DLDO1,
> @@ -117,7 +115,7 @@ struct lp8788_ldo {
>  	struct lp8788 *lp;
>  	struct regulator_desc *desc;
>  	struct regulator_dev *regulator;
> -	struct lp8788_ldo_enable_pin *en_pin;
> +	struct gpio_desc *ena_gpiod;
>  };
>  
>  /* DLDO 1, 2, 3, 9 voltage table */
> @@ -469,7 +467,6 @@ static int lp8788_config_ldo_enable_mode(struct platform_device *pdev,
>  					enum lp8788_ldo_id id)
>  {
>  	struct lp8788 *lp = ldo->lp;
> -	struct lp8788_platform_data *pdata = lp->pdata;
>  	enum lp8788_ext_ldo_en_id enable_id;
>  	u8 en_mask[] = {
>  		[EN_ALDO1]   = LP8788_EN_SEL_ALDO1_M,
> @@ -504,11 +501,18 @@ static int lp8788_config_ldo_enable_mode(struct platform_device *pdev,
>  		return 0;
>  	}
>  
> -	/* if no platform data for ldo pin, then set default enable mode */
> -	if (!pdata || !pdata->ldo_pin || !pdata->ldo_pin[enable_id])
> +	/* FIXME: check default mode for GPIO here: high or low? */
> +	ldo->ena_gpiod = devm_gpiod_get_index_optional(&pdev->dev,
> +						       "enable",
> +						       enable_id,
> +						       GPIOD_OUT_HIGH);
> +	if (IS_ERR(ldo->ena_gpiod))
> +		return PTR_ERR(ldo->ena_gpiod);
> +
> +	/* if no GPIO for ldo pin, then set default enable mode */
> +	if (!ldo->ena_gpiod)
>  		goto set_default_ldo_enable_mode;
>  
> -	ldo->en_pin = pdata->ldo_pin[enable_id];
>  	return 0;
>  
>  set_default_ldo_enable_mode:
> @@ -533,10 +537,8 @@ static int lp8788_dldo_probe(struct platform_device *pdev)
>  	if (ret)
>  		return ret;
>  
> -	if (ldo->en_pin) {
> -		cfg.ena_gpio = ldo->en_pin->gpio;
> -		cfg.ena_gpio_flags = ldo->en_pin->init_state;
> -	}
> +	if (ldo->ena_gpiod)
> +		cfg.ena_gpiod = ldo->ena_gpiod;
>  
>  	cfg.dev = pdev->dev.parent;
>  	cfg.init_data = lp->pdata ? lp->pdata->dldo_data[id] : NULL;
> @@ -582,10 +584,8 @@ static int lp8788_aldo_probe(struct platform_device *pdev)
>  	if (ret)
>  		return ret;
>  
> -	if (ldo->en_pin) {
> -		cfg.ena_gpio = ldo->en_pin->gpio;
> -		cfg.ena_gpio_flags = ldo->en_pin->init_state;
> -	}
> +	if (ldo->ena_gpiod)
> +		cfg.ena_gpiod = ldo->ena_gpiod;
>  
>  	cfg.dev = pdev->dev.parent;
>  	cfg.init_data = lp->pdata ? lp->pdata->aldo_data[id] : NULL;
> diff --git a/include/linux/mfd/lp8788.h b/include/linux/mfd/lp8788.h
> index 786bf6679a28..2010e0de3e34 100644
> --- a/include/linux/mfd/lp8788.h
> +++ b/include/linux/mfd/lp8788.h
> @@ -181,20 +181,6 @@ struct lp8788_buck2_dvs {
>  	enum lp8788_dvs_sel vsel;
>  };
>  
> -/*
> - * struct lp8788_ldo_enable_pin
> - *
> - *   Basically, all LDOs are enabled through the I2C commands.
> - *   But ALDO 1 ~ 5, 7, DLDO 7, 9, 11 can be enabled by external gpio pins.
> - *
> - * @gpio         : gpio number which is used for enabling ldos
> - * @init_state   : initial gpio state (ex. GPIOF_OUT_INIT_LOW)
> - */
> -struct lp8788_ldo_enable_pin {
> -	int gpio;
> -	int init_state;
> -};
> -
>  /*
>   * struct lp8788_chg_param
>   * @addr         : charging control register address (range : 0x11 ~ 0x1C)
> @@ -288,7 +274,6 @@ struct lp8788_vib_platform_data {
>   * @aldo_data    : regulator initial data for analog ldo
>   * @buck1_dvs    : gpio configurations for buck1 dvs
>   * @buck2_dvs    : gpio configurations for buck2 dvs
> - * @ldo_pin      : gpio configurations for enabling LDOs
>   * @chg_pdata    : platform data for charger driver
>   * @alarm_sel    : rtc alarm selection (1 or 2)
>   * @bl_pdata     : configurable data for backlight driver
> @@ -306,7 +291,6 @@ struct lp8788_platform_data {
>  	struct regulator_init_data *aldo_data[LP8788_NUM_ALDOS];
>  	struct lp8788_buck1_dvs *buck1_dvs;
>  	struct lp8788_buck2_dvs *buck2_dvs;
> -	struct lp8788_ldo_enable_pin *ldo_pin[EN_LDOS_MAX];
>  
>  	/* charger */
>  	struct lp8788_charger_platform_data *chg_pdata;

-- 
Lee Jones
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

^ permalink raw reply	[flat|nested] 54+ messages in thread

* Re: [PATCH 04/21] regulator: da9055: Pass descriptor instead of GPIO number
  2018-02-12 13:17 ` [PATCH 04/21] regulator: da9055: Pass descriptor instead of GPIO number Linus Walleij
@ 2018-02-12 14:59   ` Lee Jones
  2018-02-16 17:12   ` Applied "regulator: da9055: Pass descriptor instead of GPIO number" to the regulator tree Mark Brown
  1 sibling, 0 replies; 54+ messages in thread
From: Lee Jones @ 2018-02-12 14:59 UTC (permalink / raw)
  To: Linus Walleij; +Cc: Liam Girdwood, Mark Brown, linux-kernel, linux-gpio

On Mon, 12 Feb 2018, Linus Walleij wrote:

> When setting up a fixed regulator on the DA9055, pass a descriptor
> instead of a global GPIO number. This facility is not used in the
> kernel so we can easily just say that this should be a descriptor
> if/when put to use.
> 
> Cc: Lee Jones <lee.jones@linaro.org>
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
> ---
> Lee: would be nice if you could ACK this smallish patch
> to the MFD header.

Fine, but any sign of a conflict and I'll need a PR.

Acked-by: Lee Jones <lee.jones@linaro.org>

> ---
>  drivers/regulator/da9055-regulator.c | 4 ++--
>  include/linux/mfd/da9055/pdata.h     | 5 +++--
>  2 files changed, 5 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/regulator/da9055-regulator.c b/drivers/regulator/da9055-regulator.c
> index d029c941a1e1..f40c3b8644ae 100644
> --- a/drivers/regulator/da9055-regulator.c
> +++ b/drivers/regulator/da9055-regulator.c
> @@ -16,6 +16,7 @@
>  #include <linux/init.h>
>  #include <linux/err.h>
>  #include <linux/gpio.h>
> +#include <linux/gpio/consumer.h>
>  #include <linux/platform_device.h>
>  #include <linux/regulator/driver.h>
>  #include <linux/regulator/machine.h>
> @@ -455,8 +456,7 @@ static int da9055_gpio_init(struct da9055_regulator *regulator,
>  		char name[18];
>  		int gpio_mux = pdata->gpio_ren[id];
>  
> -		config->ena_gpio = pdata->ena_gpio[id];
> -		config->ena_gpio_flags = GPIOF_OUT_INIT_HIGH;
> +		config->ena_gpiod = pdata->ena_gpiods[id];
>  		config->ena_gpio_invert = 1;
>  
>  		/*
> diff --git a/include/linux/mfd/da9055/pdata.h b/include/linux/mfd/da9055/pdata.h
> index 04e092be4b07..1a94fa2ac309 100644
> --- a/include/linux/mfd/da9055/pdata.h
> +++ b/include/linux/mfd/da9055/pdata.h
> @@ -12,6 +12,7 @@
>  #define DA9055_MAX_REGULATORS	8
>  
>  struct da9055;
> +struct gpio_desc;
>  
>  enum gpio_select {
>  	NO_GPIO = 0,
> @@ -47,7 +48,7 @@ struct da9055_pdata {
>  	 * controls the regulator set A/B, 0 if  not available.
>  	 */
>  	enum gpio_select *reg_rsel;
> -	/* GPIOs to enable regulator, 0 if not available */
> -	int *ena_gpio;
> +	/* GPIO descriptors to enable regulator, NULL if not available */
> +	struct gpio_desc **ena_gpiods;
>  };
>  #endif /* __DA9055_PDATA_H */

-- 
Lee Jones
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

^ permalink raw reply	[flat|nested] 54+ messages in thread

* Re: [PATCH 02/21] regulator: fixed: Convert to use GPIO descriptor only
  2018-02-12 13:16 ` [PATCH 02/21] regulator: fixed: Convert to use GPIO descriptor only Linus Walleij
@ 2018-02-12 15:13   ` Andy Shevchenko
  2018-04-19 12:36     ` Linus Walleij
  0 siblings, 1 reply; 54+ messages in thread
From: Andy Shevchenko @ 2018-02-12 15:13 UTC (permalink / raw)
  To: Linus Walleij, Liam Girdwood, Mark Brown
  Cc: linux-kernel, linux-gpio, Alexander Shiyan, Haojian Zhuang,
	Aaro Koskinen, Tony Lindgren, Mike Rapoport, Robert Jarzmik,
	Philipp Zabel, Daniel Mack, Marc Zyngier, Geert Uytterhoeven

On Mon, 2018-02-12 at 14:16 +0100, Linus Walleij wrote:
> As we augmented the regulator core to accept a GPIO descriptor instead
> of a GPIO number, we can augment the fixed GPIO regulator to look up
> and pass that descriptor directly from device tree or board GPIO
> descriptor look up tables.
> 
> Some boards just auto-enumerate their fixed regulator platform devices
> and I have assumed they get names like "fixed-regulator.0" but it's
> pretty hard to guess this. I need some testing from board maintainers
> to
> be sure. Other boards are straight forward, using just plain
> "fixed-regulator" (ID -1) or "fixed-regulator.1" hammering down the
> device ID.
> 
> The OMAP didn't have proper label names on its GPIO chips so I have
> fixed
> this with a separate patch to the GPIO tree.
> 
> It seems the da9055 and da9211 has never got around to actually
> passing
> any enable gpio into its platform data (not the in-tree code anyway)
> so we
> can just decide to simply pass a descriptor instead.
> 
> The fixed GPIO-controlled regulator in mach-pxa/ezx.c was confusingly
> named
> "*_dummy_supply_device" while it is a very real device backed by a
> GPIO
> line. There is nothing dummy about it at all, so I renamed it with the
> infix *_regulator_* as part of this patch set.
> 
> For the patch hunk hitting arch/blackfin I would say I do not expect
> testing, review or ACKs anymore so if it works, it works.
> 
> The hunk hitting the x86 BCM43xx driver is especially tricky as the
> number
> comes out of SFI which is a mystery to me. I definately need someone
> to
> look at this. (Hi Andy.)

Hi, Linus!

Nice patch, though I have comments below.

> --- a/arch/x86/platform/intel-mid/device_libs/platform_bcm43xx.c
> +++ b/arch/x86/platform/intel-mid/device_libs/platform_bcm43xx.c

> @@ -43,7 +43,6 @@ static struct fixed_voltage_config bcm43xx_vmmc = {
>  	 * real voltage and signaling are still 1.8V.
>  	 */
>  	.microvolts		= 2000000,		/* 1.8V
> */
> -	.gpio			= -EINVAL,
>  	.startup_delay		= 250 * 1000,		/*
> 250ms */
>  	.enable_high		= 1,			/*
> active high */
>  	.enabled_at_boot	= 0,			/*
> disabled at boot */
> @@ -58,11 +57,25 @@ static struct platform_device
> bcm43xx_vmmc_regulator = {
>  	},
>  };
>  
> +static struct gpiod_lookup_table bcm43xx_vmmc_gpio_table = {
> +	.dev_id	= "reg-fixed-voltage.0",

I'm not sure this will be always like this.
We have DEVID_AUTO, which theoretically can be anything.

Okay, it looks like we have only one static regulator for now for Intel
MID. Though it's fragile if anything will change in the future (quite
unlikely).

> +	.table	= {

> +		/* CHECKME: is this the correct PCI address for the
> GPIO controller? */

Yes.

> +		GPIO_LOOKUP("0000:00:0c.0", -1, "enable",
> GPIO_ACTIVE_LOW),

> +		{ },

Terminator should terminate even at compile time, right?

Simple

{}

looks better to me.

> +	},
> +};
> +
>  static int __init bcm43xx_regulator_register(void)
>  {
> +	struct gpiod_lookup_table *table = &bcm43xx_vmmc_gpio_table;
> +	struct gpiod_lookup *lookup = table->table;
>  	int ret;
>  
> -	bcm43xx_vmmc.gpio =
> get_gpio_by_name(WLAN_SFI_GPIO_ENABLE_NAME);

> +	/* FIXME: convert SFI layer to use GPIO descriptors
> internally */

We already discussed this few years ago and decide not to do anything
WRT SFI. It should just die.

> +	lookup[0].chip_hwnum =
> get_gpio_by_name(WLAN_SFI_GPIO_ENABLE_NAME);
> +	gpiod_add_lookup_table(table);



> --- a/drivers/regulator/fixed.c
> +++ b/drivers/regulator/fixed.c


>  	cfg.ena_gpio_invert = !config->enable_high;

>  	if (config->enabled_at_boot) {
>  		if (config->enable_high)
> -			cfg.ena_gpio_flags |= GPIOF_OUT_INIT_HIGH;
> +			gflags = GPIOD_OUT_HIGH;
>  		else
> -			cfg.ena_gpio_flags |= GPIOF_OUT_INIT_LOW;
> +			gflags = GPIOD_OUT_LOW;
>  	} else {
>  		if (config->enable_high)
> -			cfg.ena_gpio_flags |= GPIOF_OUT_INIT_LOW;
> +			gflags = GPIOD_OUT_LOW;
>  		else
> -			cfg.ena_gpio_flags |= GPIOF_OUT_INIT_HIGH;
> +			gflags = GPIOD_OUT_HIGH;
>  	}

Just a side note: It might make sense to split this to some kind of
generic helper, like:

static inline enum gpiod_flags gpiod_flags_output(bool value, bool
invert)
{
...
}

> +	if (config->gpio_is_open_drain) {
> +		if (gflags == GPIOD_OUT_HIGH)
> +			gflags = GPIOD_OUT_HIGH_OPEN_DRAIN;
> +		else
> +			gflags = GPIOD_OUT_LOW_OPEN_DRAIN;
> +	}
> +

> +	cfg.ena_gpiod = devm_gpiod_get_optional(&pdev->dev, NULL,
> gflags);

Shouldn't we be a little bit more stricter here, i.e. require "enable"
name?

> +	if (IS_ERR(cfg.ena_gpiod))
> +		return PTR_ERR(cfg.ena_gpiod);

-- 
Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Intel Finland Oy

^ permalink raw reply	[flat|nested] 54+ messages in thread

* Re: [PATCH 05/21] regulator: arizona-ldo1: Look up a descriptor and pass to the core
  2018-02-12 13:17 ` [PATCH 05/21] regulator: arizona-ldo1: Look up a descriptor and pass to the core Linus Walleij
@ 2018-02-13 11:06   ` Charles Keepax
  2018-04-19 13:43     ` Linus Walleij
  2018-02-13 11:51   ` Charles Keepax
  1 sibling, 1 reply; 54+ messages in thread
From: Charles Keepax @ 2018-02-13 11:06 UTC (permalink / raw)
  To: Linus Walleij
  Cc: Liam Girdwood, Mark Brown, linux-kernel, linux-gpio, patches,
	Richard Fitzgerald

On Mon, Feb 12, 2018 at 02:17:01PM +0100, Linus Walleij wrote:
> Instead of passing a global GPIO number, pass a descriptor looked
> up with the standard devm_gpiod_get_optional() call.
> 
> We have augmented the GPIO core to look up the regulator special
> GPIO "wlf,ldoena" in a separate patch.
> 
> Cc: patches@opensource.cirrus.com
> Cc: Richard Fitzgerald <rf@opensource.cirrus.com>
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
> ---
>  drivers/regulator/arizona-ldo1.c       | 19 ++++++-------------
>  include/linux/regulator/arizona-ldo1.h |  3 ---
>  2 files changed, 6 insertions(+), 16 deletions(-)
> 

Does this patch not also need to update the hookups in
arch/arm/mach-s3c64xx/mach-crag6410-module.c? There is
wm5102_reva_pdata and wm5102_pdata both of which use the ldoena
you are removing here?

Thanks,
Charles

^ permalink raw reply	[flat|nested] 54+ messages in thread

* Re: [PATCH 16/21] regulator: wm8994: Pass descriptor instead of GPIO number
  2018-02-12 13:17 ` [PATCH 16/21] regulator: wm8994: Pass descriptor instead of GPIO number Linus Walleij
  2018-02-12 14:58   ` Lee Jones
@ 2018-02-13 11:11   ` Charles Keepax
  2018-04-19 13:55     ` Linus Walleij
  2018-02-13 11:52   ` [PATCH 16/21] regulator: wm8994: Pass descriptor instead of GPIO number Charles Keepax
  2 siblings, 1 reply; 54+ messages in thread
From: Charles Keepax @ 2018-02-13 11:11 UTC (permalink / raw)
  To: Linus Walleij
  Cc: Liam Girdwood, Mark Brown, linux-kernel, linux-gpio, patches, Lee Jones

On Mon, Feb 12, 2018 at 02:17:12PM +0100, Linus Walleij wrote:
> Instead of passing a global GPIO number for the enable GPIO, pass
> a descriptor looked up from the device tree node or the board file
> decriptor table for the regulator.
> 
> There is a single board file passing the GPIOs for LDO1 and LDO2
> through platform data, so augment this to pass descriptors
> associated with the i2c device as well.
> 
> Cc: patches@opensource.cirrus.com
> Cc: Charles Keepax <ckeepax@opensource.cirrus.com>
> Cc: Lee Jones <lee.jones@linaro.org>
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
> ---
> Lee: this patch is touching the MFD core driver for WM8994,
> but as with all other patches we just change the regulator
> parts. Would be nice if you could ACK it.
> ---
>  arch/arm/mach-s3c64xx/mach-crag6410-module.c | 18 ++++++++++++++++--
>  drivers/mfd/wm8994-core.c                    |  9 ---------
>  drivers/regulator/wm8994-regulator.c         | 19 +++++++++++--------
>  include/linux/mfd/wm8994/pdata.h             |  3 ---
>  4 files changed, 27 insertions(+), 22 deletions(-)
> 
> +static struct gpiod_lookup_table wm8994_gpiod_table = {
> +	.dev_id = "i2c-wm8958", /* I2C device name */
> +	.table = {
> +		GPIO_LOOKUP("GPION", 6,
> +			    "wlf,ldo1ena", GPIO_ACTIVE_HIGH),
> +		GPIO_LOOKUP("GPION", 4,
> +			    "wlf,ldo2ena", GPIO_ACTIVE_HIGH),
> +		{ },
>  	},
>  };
>  
> @@ -366,6 +379,7 @@ static int wlf_gf_module_probe(struct i2c_client *i2c,
>  					    rev == gf_mods[i].rev))
>  			break;
>  
> +	gpiod_add_lookup_table(&wm8994_gpiod_table);

Would it be nicer to add this as a new member of gf_mods and
register it inside the loop? Since eventually we will need tables
for wm5102, wm8994, wm2200, wm8996, wm5100 and wm0010.

Thanks,
Charles

^ permalink raw reply	[flat|nested] 54+ messages in thread

* Re: [PATCH 05/21] regulator: arizona-ldo1: Look up a descriptor and pass to the core
  2018-02-12 13:17 ` [PATCH 05/21] regulator: arizona-ldo1: Look up a descriptor and pass to the core Linus Walleij
  2018-02-13 11:06   ` Charles Keepax
@ 2018-02-13 11:51   ` Charles Keepax
  1 sibling, 0 replies; 54+ messages in thread
From: Charles Keepax @ 2018-02-13 11:51 UTC (permalink / raw)
  To: Linus Walleij
  Cc: Liam Girdwood, Mark Brown, linux-kernel, linux-gpio, patches,
	Richard Fitzgerald

On Mon, Feb 12, 2018 at 02:17:01PM +0100, Linus Walleij wrote:
> Instead of passing a global GPIO number, pass a descriptor looked
> up with the standard devm_gpiod_get_optional() call.
> 
> We have augmented the GPIO core to look up the regulator special
> GPIO "wlf,ldoena" in a separate patch.
> 
> Cc: patches@opensource.cirrus.com
> Cc: Richard Fitzgerald <rf@opensource.cirrus.com>
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
> ---
> -	config.ena_gpio = pdata->ldoena;
> +	/* We assume that high output = regulator off */
> +	config.ena_gpiod = devm_gpiod_get_optional(&pdev->dev, "wlf,ldoena",
> +						   GPIOD_OUT_HIGH);
> +	if (IS_ERR(config.ena_gpiod))
> +		return PTR_ERR(config.ena_gpiod);

Also looking at this more you will need to you
devm_gpio_get_from_of_node here since the device tree binding is
for wlf,ldoena not wlf,ldoena-gpio. So this patch currently
breaks the binding.

Thanks,
Charles

^ permalink raw reply	[flat|nested] 54+ messages in thread

* Re: [PATCH 16/21] regulator: wm8994: Pass descriptor instead of GPIO number
  2018-02-12 13:17 ` [PATCH 16/21] regulator: wm8994: Pass descriptor instead of GPIO number Linus Walleij
  2018-02-12 14:58   ` Lee Jones
  2018-02-13 11:11   ` Charles Keepax
@ 2018-02-13 11:52   ` Charles Keepax
  2 siblings, 0 replies; 54+ messages in thread
From: Charles Keepax @ 2018-02-13 11:52 UTC (permalink / raw)
  To: Linus Walleij
  Cc: Liam Girdwood, Mark Brown, linux-kernel, linux-gpio, patches, Lee Jones

On Mon, Feb 12, 2018 at 02:17:12PM +0100, Linus Walleij wrote:
> Instead of passing a global GPIO number for the enable GPIO, pass
> a descriptor looked up from the device tree node or the board file
> decriptor table for the regulator.
> 
> There is a single board file passing the GPIOs for LDO1 and LDO2
> through platform data, so augment this to pass descriptors
> associated with the i2c device as well.
> 
> Cc: patches@opensource.cirrus.com
> Cc: Charles Keepax <ckeepax@opensource.cirrus.com>
> Cc: Lee Jones <lee.jones@linaro.org>
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
> ---
> +	/* Look up LDO enable GPIO from the parent device node */
> +	gpiod = devm_gpiod_get_optional(pdev->dev.parent,
> +					id ? "wlf,ldo2ena" : "wlf,ldo1ena",
> +					GPIOD_OUT_LOW);
> +	if (IS_ERR(gpiod))
> +		return PTR_ERR(gpiod);
> +	config.ena_gpiod = gpiod;

Likewise here the DT bindings for these parts have no -gpio
suffix on them so this will break the DT case.

Thanks,
Charles

^ permalink raw reply	[flat|nested] 54+ messages in thread

* Applied "regulator: da9211: Pass descriptors instead of GPIO numbers" to the regulator tree
  2018-02-12 13:17 ` [PATCH 06/21] regulator: da9211: Pass descriptors instead of GPIO numbers Linus Walleij
@ 2018-02-16 17:12   ` Mark Brown
  0 siblings, 0 replies; 54+ messages in thread
From: Mark Brown @ 2018-02-16 17:12 UTC (permalink / raw)
  To: Linus Walleij
  Cc: Mark Brown, Liam Girdwood, Mark Brown, linux-kernel, linux-gpio,
	linux-kernel

The patch

   regulator: da9211: Pass descriptors instead of GPIO numbers

has been applied to the regulator tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 11da04af0d3b4c24ab057dd17f54dbc854d735de Mon Sep 17 00:00:00 2001
From: Linus Walleij <linus.walleij@linaro.org>
Date: Mon, 12 Feb 2018 14:17:02 +0100
Subject: [PATCH] regulator: da9211: Pass descriptors instead of GPIO numbers

This augments the DA9211 regulator driver to fetch its GPIO descriptors
directly from the device tree using the newly exported
devm_get_gpiod_from_child().

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/regulator/da9211-regulator.c | 23 +++++++++++------------
 include/linux/regulator/da9211.h     |  4 +++-
 2 files changed, 14 insertions(+), 13 deletions(-)

diff --git a/drivers/regulator/da9211-regulator.c b/drivers/regulator/da9211-regulator.c
index 9b8f47617724..6c122b3df5d0 100644
--- a/drivers/regulator/da9211-regulator.c
+++ b/drivers/regulator/da9211-regulator.c
@@ -15,7 +15,6 @@
  */
 
 #include <linux/err.h>
-#include <linux/gpio.h>
 #include <linux/i2c.h>
 #include <linux/module.h>
 #include <linux/init.h>
@@ -25,7 +24,7 @@
 #include <linux/regmap.h>
 #include <linux/irq.h>
 #include <linux/interrupt.h>
-#include <linux/of_gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/regulator/of_regulator.h>
 #include <linux/regulator/da9211.h>
 #include "da9211-regulator.h"
@@ -294,9 +293,12 @@ static struct da9211_pdata *da9211_parse_regulators_dt(
 
 		pdata->init_data[n] = da9211_matches[i].init_data;
 		pdata->reg_node[n] = da9211_matches[i].of_node;
-		pdata->gpio_ren[n] =
-			of_get_named_gpio(da9211_matches[i].of_node,
-				"enable-gpios", 0);
+		pdata->gpiod_ren[n] = devm_gpiod_get_from_of_node(dev,
+								  da9211_matches[i].of_node,
+								  "enable",
+								  0,
+								  GPIOD_OUT_HIGH,
+								  "da9211-enable");
 		n++;
 	}
 
@@ -382,13 +384,10 @@ static int da9211_regulator_init(struct da9211 *chip)
 		config.regmap = chip->regmap;
 		config.of_node = chip->pdata->reg_node[i];
 
-		if (gpio_is_valid(chip->pdata->gpio_ren[i])) {
-			config.ena_gpio = chip->pdata->gpio_ren[i];
-			config.ena_gpio_initialized = true;
-		} else {
-			config.ena_gpio = -EINVAL;
-			config.ena_gpio_initialized = false;
-		}
+		if (chip->pdata->gpiod_ren[i])
+			config.ena_gpiod = chip->pdata->gpiod_ren[i];
+		else
+			config.ena_gpiod = NULL;
 
 		chip->rdev[i] = devm_regulator_register(chip->dev,
 			&da9211_regulators[i], &config);
diff --git a/include/linux/regulator/da9211.h b/include/linux/regulator/da9211.h
index f2fd2d3bf58f..d1f2073e4d5f 100644
--- a/include/linux/regulator/da9211.h
+++ b/include/linux/regulator/da9211.h
@@ -21,6 +21,8 @@
 
 #define DA9211_MAX_REGULATORS	2
 
+struct gpio_desc;
+
 enum da9211_chip_id {
 	DA9211,
 	DA9212,
@@ -39,7 +41,7 @@ struct da9211_pdata {
 	 * 2 : 2 phase 2 buck
 	 */
 	int num_buck;
-	int gpio_ren[DA9211_MAX_REGULATORS];
+	struct gpio_desc *gpiod_ren[DA9211_MAX_REGULATORS];
 	struct device_node *reg_node[DA9211_MAX_REGULATORS];
 	struct regulator_init_data *init_data[DA9211_MAX_REGULATORS];
 };
-- 
2.16.1

^ permalink raw reply	[flat|nested] 54+ messages in thread

* Applied "regulator: da9055: Pass descriptor instead of GPIO number" to the regulator tree
  2018-02-12 13:17 ` [PATCH 04/21] regulator: da9055: Pass descriptor instead of GPIO number Linus Walleij
  2018-02-12 14:59   ` Lee Jones
@ 2018-02-16 17:12   ` Mark Brown
  1 sibling, 0 replies; 54+ messages in thread
From: Mark Brown @ 2018-02-16 17:12 UTC (permalink / raw)
  To: Linus Walleij
  Cc: Lee Jones, Mark Brown, Liam Girdwood, Mark Brown, linux-kernel,
	linux-gpio, Lee Jones, linux-kernel

The patch

   regulator: da9055: Pass descriptor instead of GPIO number

has been applied to the regulator tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 8d05560d1d011e5a842556efdbd70cc8a21499bb Mon Sep 17 00:00:00 2001
From: Linus Walleij <linus.walleij@linaro.org>
Date: Mon, 12 Feb 2018 14:17:00 +0100
Subject: [PATCH] regulator: da9055: Pass descriptor instead of GPIO number

When setting up a fixed regulator on the DA9055, pass a descriptor
instead of a global GPIO number. This facility is not used in the
kernel so we can easily just say that this should be a descriptor
if/when put to use.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/regulator/da9055-regulator.c | 4 ++--
 include/linux/mfd/da9055/pdata.h     | 5 +++--
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/regulator/da9055-regulator.c b/drivers/regulator/da9055-regulator.c
index d029c941a1e1..f40c3b8644ae 100644
--- a/drivers/regulator/da9055-regulator.c
+++ b/drivers/regulator/da9055-regulator.c
@@ -16,6 +16,7 @@
 #include <linux/init.h>
 #include <linux/err.h>
 #include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/driver.h>
 #include <linux/regulator/machine.h>
@@ -455,8 +456,7 @@ static int da9055_gpio_init(struct da9055_regulator *regulator,
 		char name[18];
 		int gpio_mux = pdata->gpio_ren[id];
 
-		config->ena_gpio = pdata->ena_gpio[id];
-		config->ena_gpio_flags = GPIOF_OUT_INIT_HIGH;
+		config->ena_gpiod = pdata->ena_gpiods[id];
 		config->ena_gpio_invert = 1;
 
 		/*
diff --git a/include/linux/mfd/da9055/pdata.h b/include/linux/mfd/da9055/pdata.h
index 04e092be4b07..1a94fa2ac309 100644
--- a/include/linux/mfd/da9055/pdata.h
+++ b/include/linux/mfd/da9055/pdata.h
@@ -12,6 +12,7 @@
 #define DA9055_MAX_REGULATORS	8
 
 struct da9055;
+struct gpio_desc;
 
 enum gpio_select {
 	NO_GPIO = 0,
@@ -47,7 +48,7 @@ struct da9055_pdata {
 	 * controls the regulator set A/B, 0 if  not available.
 	 */
 	enum gpio_select *reg_rsel;
-	/* GPIOs to enable regulator, 0 if not available */
-	int *ena_gpio;
+	/* GPIO descriptors to enable regulator, NULL if not available */
+	struct gpio_desc **ena_gpiods;
 };
 #endif /* __DA9055_PDATA_H */
-- 
2.16.1

^ permalink raw reply	[flat|nested] 54+ messages in thread

* Applied "regulator: core: Support passing an initialized GPIO enable descriptor" to the regulator tree
  2018-02-12 13:16 ` [PATCH 01/21] regulator: core: Support passing an initialized GPIO enable descriptor Linus Walleij
@ 2018-02-16 17:12   ` Mark Brown
  0 siblings, 0 replies; 54+ messages in thread
From: Mark Brown @ 2018-02-16 17:12 UTC (permalink / raw)
  To: Linus Walleij
  Cc: Mark Brown, Liam Girdwood, Mark Brown, linux-kernel, linux-gpio,
	linux-kernel

The patch

   regulator: core: Support passing an initialized GPIO enable descriptor

has been applied to the regulator tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From e45e290a882e2c0dc8ebb7dd21c66a8209d8e3a5 Mon Sep 17 00:00:00 2001
From: Linus Walleij <linus.walleij@linaro.org>
Date: Mon, 12 Feb 2018 14:16:57 +0100
Subject: [PATCH] regulator: core: Support passing an initialized GPIO enable
 descriptor

We are currently passing a GPIO number from the global GPIO numberspace
into the regulator core for handling enable GPIOs. This is not good
since it ties into the global GPIO numberspace and uses gpio_to_desc()
to overcome this.

Start supporting passing an already initialized GPIO descriptor to the
core instead: leaf drivers pick their descriptors, associated directly
with the device node (or from ACPI or from a board descriptor table)
and use that directly without any roundtrip over the global GPIO
numberspace.

This looks messy since it adds a bunch of extra code in the core, but
at the end of the patch series we will delete the handling of the GPIO
number and only deal with descriptors so things end up neat.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/regulator/core.c         | 25 ++++++++++++++++---------
 include/linux/regulator/driver.h |  3 +++
 2 files changed, 19 insertions(+), 9 deletions(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index dd4708c58480..4549b93b0ff9 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -1937,7 +1937,10 @@ static int regulator_ena_gpio_request(struct regulator_dev *rdev,
 	struct gpio_desc *gpiod;
 	int ret;
 
-	gpiod = gpio_to_desc(config->ena_gpio);
+	if (config->ena_gpiod)
+		gpiod = config->ena_gpiod;
+	else
+		gpiod = gpio_to_desc(config->ena_gpio);
 
 	list_for_each_entry(pin, &regulator_ena_gpio_list, list) {
 		if (pin->gpiod == gpiod) {
@@ -1947,15 +1950,18 @@ static int regulator_ena_gpio_request(struct regulator_dev *rdev,
 		}
 	}
 
-	ret = gpio_request_one(config->ena_gpio,
-				GPIOF_DIR_OUT | config->ena_gpio_flags,
-				rdev_get_name(rdev));
-	if (ret)
-		return ret;
+	if (!config->ena_gpiod) {
+		ret = gpio_request_one(config->ena_gpio,
+				       GPIOF_DIR_OUT | config->ena_gpio_flags,
+				       rdev_get_name(rdev));
+		if (ret)
+			return ret;
+	}
 
 	pin = kzalloc(sizeof(struct regulator_enable_gpio), GFP_KERNEL);
 	if (pin == NULL) {
-		gpio_free(config->ena_gpio);
+		if (!config->ena_gpiod)
+			gpio_free(config->ena_gpio);
 		return -ENOMEM;
 	}
 
@@ -4154,8 +4160,9 @@ regulator_register(const struct regulator_desc *regulator_desc,
 			goto clean;
 	}
 
-	if ((config->ena_gpio || config->ena_gpio_initialized) &&
-	    gpio_is_valid(config->ena_gpio)) {
+	if (config->ena_gpiod ||
+	    ((config->ena_gpio || config->ena_gpio_initialized) &&
+	     gpio_is_valid(config->ena_gpio))) {
 		mutex_lock(&regulator_list_mutex);
 		ret = regulator_ena_gpio_request(rdev, config);
 		mutex_unlock(&regulator_list_mutex);
diff --git a/include/linux/regulator/driver.h b/include/linux/regulator/driver.h
index 4c00486b7a78..4fc96cb8e5d7 100644
--- a/include/linux/regulator/driver.h
+++ b/include/linux/regulator/driver.h
@@ -19,6 +19,7 @@
 #include <linux/notifier.h>
 #include <linux/regulator/consumer.h>
 
+struct gpio_desc;
 struct regmap;
 struct regulator_dev;
 struct regulator_config;
@@ -387,6 +388,7 @@ struct regulator_desc {
  *                        initialized, meaning that >= 0 is a valid gpio
  *                        identifier and < 0 is a non existent gpio.
  * @ena_gpio: GPIO controlling regulator enable.
+ * @ena_gpiod: GPIO descriptor controlling regulator enable.
  * @ena_gpio_invert: Sense for GPIO enable control.
  * @ena_gpio_flags: Flags to use when calling gpio_request_one()
  */
@@ -399,6 +401,7 @@ struct regulator_config {
 
 	bool ena_gpio_initialized;
 	int ena_gpio;
+	struct gpio_desc *ena_gpiod;
 	unsigned int ena_gpio_invert:1;
 	unsigned int ena_gpio_flags;
 };
-- 
2.16.1

^ permalink raw reply	[flat|nested] 54+ messages in thread

* Re: [PATCH 18/21] regulator: fixed/gpio: Pull inversion/OD into gpiolib
  2018-02-12 13:17 ` [PATCH 18/21] regulator: fixed/gpio: Pull inversion/OD into gpiolib Linus Walleij
@ 2018-02-17  9:59   ` Robert Jarzmik
  0 siblings, 0 replies; 54+ messages in thread
From: Robert Jarzmik @ 2018-02-17  9:59 UTC (permalink / raw)
  To: Linus Walleij
  Cc: Liam Girdwood, Mark Brown, linux-kernel, linux-gpio,
	Alexander Shiyan, Haojian Zhuang, Aaro Koskinen, Tony Lindgren,
	Mike Rapoport, Philipp Zabel, Daniel Mack, Marc Zyngier,
	Geert Uytterhoeven

Linus Walleij <linus.walleij@linaro.org> writes:

> This pushes the handling of inversion semantics and open drain
> settings to the GPIO descriptor and gpiolib. All affected board
> files are also augmented.

Hi Linus,

Could we split the patch into chunks, one for i2c, one for pxa, etc ...
I fear that exceptionally I have a couple of competing patches for the pxa tree,
and a conflict might arise between 3 trees (I2C, MTD, PXA).

Otherwise it looks good for the PXA part.

Cheers.

-- 
Robert

^ permalink raw reply	[flat|nested] 54+ messages in thread

* Re: [PATCH 19/21] regulator: fixed/gpio: Update device tree bindings
  2018-02-12 13:17 ` [PATCH 19/21] regulator: fixed/gpio: Update device tree bindings Linus Walleij
@ 2018-02-19  2:41   ` Rob Herring
  0 siblings, 0 replies; 54+ messages in thread
From: Rob Herring @ 2018-02-19  2:41 UTC (permalink / raw)
  To: Linus Walleij
  Cc: Liam Girdwood, Mark Brown, linux-kernel, linux-gpio, devicetree

On Mon, Feb 12, 2018 at 02:17:15PM +0100, Linus Walleij wrote:
> Deprecate the open drain binding for fixed regulator and indicate
> that we prefer this to be passed in the GPIO phandle flags.
> 
> Clarify that the line inversion semantics for fixed and GPIO
> regulators completely overrides the active low flags in the
> phandle flags.
> 
> Unfortunately this can not be changed to prefer that we pass
> the flags in the phandle: the bindings have been specified and
> deployed such that the presence/absence of this flag and only
> that controls the line inversion semantics. The crucial semantic
> is that the absence of the flag means the core will assume
> the line is active low, which in GPIO terms is an exception,
> as GPIO lines are normally assumed to be active high.
> 
> This special device tree semantic cannot be changed without
> introducing a whole new compatible string for the fixed and
> GPIO regulators, so we just contain the situation.
> 
> Cc: devicetree@vger.kernel.org
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
> ---
>  .../devicetree/bindings/regulator/fixed-regulator.txt       | 13 +++++++++++--
>  .../devicetree/bindings/regulator/gpio-regulator.txt        |  4 ++++
>  2 files changed, 15 insertions(+), 2 deletions(-)

Reviewed-by: Rob Herring <robh@kernel.org>

^ permalink raw reply	[flat|nested] 54+ messages in thread

* Re: [PATCH 02/21] regulator: fixed: Convert to use GPIO descriptor only
  2018-02-12 15:13   ` Andy Shevchenko
@ 2018-04-19 12:36     ` Linus Walleij
  0 siblings, 0 replies; 54+ messages in thread
From: Linus Walleij @ 2018-04-19 12:36 UTC (permalink / raw)
  To: Andy Shevchenko
  Cc: Liam Girdwood, Mark Brown, linux-kernel,
	open list:GPIO SUBSYSTEM, Alexander Shiyan, Haojian Zhuang,
	Aaro Koskinen, Tony Lindgren, Mike Rapoport, Robert Jarzmik,
	Philipp Zabel, Daniel Mack, Marc Zyngier, Geert Uytterhoeven

On Mon, Feb 12, 2018 at 4:13 PM, Andy Shevchenko
<andriy.shevchenko@linux.intel.com> wrote:

>> +static struct gpiod_lookup_table bcm43xx_vmmc_gpio_table = {
>> +     .dev_id = "reg-fixed-voltage.0",
>
> I'm not sure this will be always like this.
> We have DEVID_AUTO, which theoretically can be anything.
>
> Okay, it looks like we have only one static regulator for now for Intel
> MID. Though it's fragile if anything will change in the future (quite
> unlikely).

OK let's hope this doesn't blow up in our face :/
Then I have to think of something.

>> +     cfg.ena_gpiod = devm_gpiod_get_optional(&pdev->dev, NULL,
>> gflags);
>
> Shouldn't we be a little bit more stricter here, i.e. require "enable"
> name?

It sadly won't work.

The reason is the way the regulator device tree bindings look,
specifying just:

Optional properties:
- gpio: gpio to use for enable control
- startup-delay-us: startup time in microseconds
- enable-active-high: Polarity of GPIO is Active high
If this property is missing, the default assumed is Active low.
- gpio-open-drain: GPIO is open drain type.
  If this property is missing then default assumption is false.
-vin-supply: Input supply name.

Not "enable-gpios" as we would write it today.

So it has to retrieve the first (and only) GPIO.

This is another of those historical artifacts, I have tried to
contain some of them, but I don't know if I can do much
about this one :/

Yours,
Linus Walleij

^ permalink raw reply	[flat|nested] 54+ messages in thread

* Re: [PATCH 05/21] regulator: arizona-ldo1: Look up a descriptor and pass to the core
  2018-02-13 11:06   ` Charles Keepax
@ 2018-04-19 13:43     ` Linus Walleij
  2018-04-19 15:02       ` Charles Keepax
  0 siblings, 1 reply; 54+ messages in thread
From: Linus Walleij @ 2018-04-19 13:43 UTC (permalink / raw)
  To: Charles Keepax
  Cc: Liam Girdwood, Mark Brown, linux-kernel,
	open list:GPIO SUBSYSTEM, patches, Richard Fitzgerald

On Tue, Feb 13, 2018 at 12:06 PM, Charles Keepax
<ckeepax@opensource.cirrus.com> wrote:
> On Mon, Feb 12, 2018 at 02:17:01PM +0100, Linus Walleij wrote:
>> Instead of passing a global GPIO number, pass a descriptor looked
>> up with the standard devm_gpiod_get_optional() call.
>>
>> We have augmented the GPIO core to look up the regulator special
>> GPIO "wlf,ldoena" in a separate patch.
>>
>> Cc: patches@opensource.cirrus.com
>> Cc: Richard Fitzgerald <rf@opensource.cirrus.com>
>> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
>> ---
>>  drivers/regulator/arizona-ldo1.c       | 19 ++++++-------------
>>  include/linux/regulator/arizona-ldo1.h |  3 ---
>>  2 files changed, 6 insertions(+), 16 deletions(-)
>>
>
> Does this patch not also need to update the hookups in
> arch/arm/mach-s3c64xx/mach-crag6410-module.c? There is
> wm5102_reva_pdata and wm5102_pdata both of which use the ldoena
> you are removing here?

OK fixed this!

> Also looking at this more you will need to you
> devm_gpio_get_from_of_node here since the device tree binding is
> for wlf,ldoena not wlf,ldoena-gpio. So this patch currently
> breaks the binding.

Actually not, because I fixed that in  the special quirk patch
6a537d48461d
"gpio: of: Support regulator nonstandard GPIO properties"
as mentioned in the commit message. (Will clarify.)

Yours,
Linus Walleij

^ permalink raw reply	[flat|nested] 54+ messages in thread

* Re: [PATCH 16/21] regulator: wm8994: Pass descriptor instead of GPIO number
  2018-02-13 11:11   ` Charles Keepax
@ 2018-04-19 13:55     ` Linus Walleij
  2018-04-19 14:05       ` Mark Brown
  2018-04-19 15:01       ` [PATCH] ARM: s3c64xx: Tidy up handling of regulator GPIO lookups Charles Keepax
  0 siblings, 2 replies; 54+ messages in thread
From: Linus Walleij @ 2018-04-19 13:55 UTC (permalink / raw)
  To: Charles Keepax
  Cc: Liam Girdwood, Mark Brown, linux-kernel,
	open list:GPIO SUBSYSTEM, patches, Lee Jones

On Tue, Feb 13, 2018 at 12:11 PM, Charles Keepax
<ckeepax@opensource.cirrus.com> wrote:

>> +static struct gpiod_lookup_table wm8994_gpiod_table = {
>> +     .dev_id = "i2c-wm8958", /* I2C device name */
>> +     .table = {
>> +             GPIO_LOOKUP("GPION", 6,
>> +                         "wlf,ldo1ena", GPIO_ACTIVE_HIGH),
>> +             GPIO_LOOKUP("GPION", 4,
>> +                         "wlf,ldo2ena", GPIO_ACTIVE_HIGH),
>> +             { },
>>       },
>>  };
>>
>> @@ -366,6 +379,7 @@ static int wlf_gf_module_probe(struct i2c_client *i2c,
>>                                           rev == gf_mods[i].rev))
>>                       break;
>>
>> +     gpiod_add_lookup_table(&wm8994_gpiod_table);
>
> Would it be nicer to add this as a new member of gf_mods and
> register it inside the loop?

There is a lot of stuff that would be nice, but currently I'm almost
breaking my back over these refactorings, so I would prefer to
take one thing per patch, cleanups can be done later. I am also
hesitant to do any unnecessary infrastructure changes as I
cannot test anything (don't have this system).

> Since eventually we will need tables
> for wm5102, wm8994, wm2200, wm8996, wm5100 and wm0010.

Just wm5102 and wm8994 this time, because only those
drivers pass an enable GPIO to the regulator core. The wm2200
for example is just managing the LDO without the use of the
regulator framework (I guess this is technically incorrect).

I am only trying to fix the regulators right now, fixing all GPIOs
in the kernel tree to use descriptors is something I might have
time to accomplish before I retire.

> Likewise here the DT bindings for these parts have no -gpio
> suffix on them so this will break the DT case.

This is solved in the GPIO OF core as mentioned before.
I will put a pointer in the commit message.

Yours,
Linus Walleij

^ permalink raw reply	[flat|nested] 54+ messages in thread

* Re: [PATCH 16/21] regulator: wm8994: Pass descriptor instead of GPIO number
  2018-04-19 13:55     ` Linus Walleij
@ 2018-04-19 14:05       ` Mark Brown
  2018-04-19 15:01       ` [PATCH] ARM: s3c64xx: Tidy up handling of regulator GPIO lookups Charles Keepax
  1 sibling, 0 replies; 54+ messages in thread
From: Mark Brown @ 2018-04-19 14:05 UTC (permalink / raw)
  To: Linus Walleij
  Cc: Charles Keepax, Liam Girdwood, linux-kernel,
	open list:GPIO SUBSYSTEM, patches, Lee Jones

[-- Attachment #1: Type: text/plain, Size: 562 bytes --]

On Thu, Apr 19, 2018 at 03:55:35PM +0200, Linus Walleij wrote:

> drivers pass an enable GPIO to the regulator core. The wm2200
> for example is just managing the LDO without the use of the
> regulator framework (I guess this is technically incorrect).

It's fine if it's internal to the chip and there's no realistic
mechanism to replace the regulator with an off-chip one.  The reason
the other two CODECs have explicit regulator drivers is that they're
designed to support using an off-chip regulator instead so they need to
look like external regulators do.

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 488 bytes --]

^ permalink raw reply	[flat|nested] 54+ messages in thread

* [PATCH] ARM: s3c64xx: Tidy up handling of regulator GPIO lookups
  2018-04-19 13:55     ` Linus Walleij
  2018-04-19 14:05       ` Mark Brown
@ 2018-04-19 15:01       ` Charles Keepax
  2018-05-14  5:54         ` Linus Walleij
  1 sibling, 1 reply; 54+ messages in thread
From: Charles Keepax @ 2018-04-19 15:01 UTC (permalink / raw)
  To: Linus Walleij
  Cc: Liam Girdwood, Mark Brown, linux-kernel,
	open list:GPIO SUBSYSTEM, patches, Lee Jones

From: Charles Keepax <ckeepax@opensource.cirrus.com>

Rather than unconditionally registering the GPIO lookup table only do so
for devices that require it.

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
---

Do you have any objections to the following?

If we are lucky I might be able to find time to test these early
next week. Well at least there is reasonable chance I can test
the 5102 stuff when you resend, not sure I have a device to
test the wm1277 but will have a look. Also I haven't run up
Cragganmore in a little while so might depend a little on how
much people have broken it since last I did :-)

Thanks,
Charles

 arch/arm/mach-s3c64xx/mach-crag6410-module.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-s3c64xx/mach-crag6410-module.c b/arch/arm/mach-s3c64xx/mach-crag6410-module.c
index a4db97f156d78..883907fb38e28 100644
--- a/arch/arm/mach-s3c64xx/mach-crag6410-module.c
+++ b/arch/arm/mach-s3c64xx/mach-crag6410-module.c
@@ -316,6 +316,8 @@ static const struct {
 	int num_i2c_devs;
 	const struct spi_board_info *spi_devs;
 	int num_spi_devs;
+
+	struct gpiod_lookup_table *gpiod_table;
 } gf_mods[] = {
 	{ .id = 0x01, .rev = 0xff, .name = "1250-EV1 Springbank" },
 	{ .id = 0x02, .rev = 0xff, .name = "1251-EV1 Jura" },
@@ -350,7 +352,8 @@ static const struct {
 	  .i2c_devs = wm1255_devs, .num_i2c_devs = ARRAY_SIZE(wm1255_devs) },
 	{ .id = 0x3c, .rev = 0xff, .name = "1273-EV1 Longmorn" },
 	{ .id = 0x3d, .rev = 0xff, .name = "1277-EV1 Littlemill",
-	  .i2c_devs = wm1277_devs, .num_i2c_devs = ARRAY_SIZE(wm1277_devs) },
+	  .i2c_devs = wm1277_devs, .num_i2c_devs = ARRAY_SIZE(wm1277_devs),
+	  .gpiod_table = &wm8994_gpiod_table },
 	{ .id = 0x3e, .rev = 0, .name = "WM5102-6271-EV1-CS127 Amrut",
 	  .spi_devs = wm5102_reva_spi_devs,
 	  .num_spi_devs = ARRAY_SIZE(wm5102_reva_spi_devs) },
@@ -379,7 +382,6 @@ static int wlf_gf_module_probe(struct i2c_client *i2c,
 					    rev == gf_mods[i].rev))
 			break;
 
-	gpiod_add_lookup_table(&wm8994_gpiod_table);
 	if (i < ARRAY_SIZE(gf_mods)) {
 		dev_info(&i2c->dev, "%s revision %d\n",
 			 gf_mods[i].name, rev + 1);
@@ -393,6 +395,9 @@ static int wlf_gf_module_probe(struct i2c_client *i2c,
 
 		spi_register_board_info(gf_mods[i].spi_devs,
 					gf_mods[i].num_spi_devs);
+
+		if (gf_mods[i].gpiod_table)
+			gpiod_add_lookup_table(gf_mods[i].gpiod_table);
 	} else {
 		dev_warn(&i2c->dev, "Unknown module ID 0x%x revision %d\n",
 			 id, rev + 1);
-- 
2.11.0

^ permalink raw reply	[flat|nested] 54+ messages in thread

* Re: [PATCH 05/21] regulator: arizona-ldo1: Look up a descriptor and pass to the core
  2018-04-19 13:43     ` Linus Walleij
@ 2018-04-19 15:02       ` Charles Keepax
  0 siblings, 0 replies; 54+ messages in thread
From: Charles Keepax @ 2018-04-19 15:02 UTC (permalink / raw)
  To: Linus Walleij
  Cc: Liam Girdwood, Mark Brown, linux-kernel,
	open list:GPIO SUBSYSTEM, patches, Richard Fitzgerald

On Thu, Apr 19, 2018 at 03:43:22PM +0200, Linus Walleij wrote:
> On Tue, Feb 13, 2018 at 12:06 PM, Charles Keepax
> <ckeepax@opensource.cirrus.com> wrote:
> > On Mon, Feb 12, 2018 at 02:17:01PM +0100, Linus Walleij wrote:
> >> Instead of passing a global GPIO number, pass a descriptor looked
> >> up with the standard devm_gpiod_get_optional() call.
> >>
> >> We have augmented the GPIO core to look up the regulator special
> >> GPIO "wlf,ldoena" in a separate patch.
> >>
> >> Cc: patches@opensource.cirrus.com
> >> Cc: Richard Fitzgerald <rf@opensource.cirrus.com>
> >> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
> >> ---
> > Also looking at this more you will need to you
> > devm_gpio_get_from_of_node here since the device tree binding is
> > for wlf,ldoena not wlf,ldoena-gpio. So this patch currently
> > breaks the binding.
> 
> Actually not, because I fixed that in  the special quirk patch
> 6a537d48461d
> "gpio: of: Support regulator nonstandard GPIO properties"
> as mentioned in the commit message. (Will clarify.)

Apologies my bad should have spotted that in the commit message.

Thanks,
Charles

^ permalink raw reply	[flat|nested] 54+ messages in thread

* Re: [PATCH] ARM: s3c64xx: Tidy up handling of regulator GPIO lookups
  2018-04-19 15:01       ` [PATCH] ARM: s3c64xx: Tidy up handling of regulator GPIO lookups Charles Keepax
@ 2018-05-14  5:54         ` Linus Walleij
  0 siblings, 0 replies; 54+ messages in thread
From: Linus Walleij @ 2018-05-14  5:54 UTC (permalink / raw)
  To: Charles Keepax
  Cc: Liam Girdwood, Mark Brown, linux-kernel,
	open list:GPIO SUBSYSTEM, patches, Lee Jones

On Thu, Apr 19, 2018 at 5:01 PM, Charles Keepax
<ckeepax@opensource.cirrus.com> wrote:

> From: Charles Keepax <ckeepax@opensource.cirrus.com>
>
> Rather than unconditionally registering the GPIO lookup table only do so
> for devices that require it.
>
> Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
> ---
>
> Do you have any objections to the following?
>
> If we are lucky I might be able to find time to test these early
> next week. Well at least there is reasonable chance I can test
> the 5102 stuff when you resend, not sure I have a device to
> test the wm1277 but will have a look. Also I haven't run up
> Cragganmore in a little while so might depend a little on how
> much people have broken it since last I did :-)

I folded this in on top of my series, also adding the table entries
for wm5102 and wm5102 reva.

Sorry for the delay, I was sidetracked...

Yours,
Linus Walleij

^ permalink raw reply	[flat|nested] 54+ messages in thread

* Applied "regulator: s2mps11: Pass descriptor instead of GPIO number" to the regulator tree
  2018-02-12 13:17 ` [PATCH 13/21] regulator: s2mps11: Pass descriptor instead of GPIO number Linus Walleij
@ 2018-05-17 16:41   ` Mark Brown
  0 siblings, 0 replies; 54+ messages in thread
From: Mark Brown @ 2018-05-17 16:41 UTC (permalink / raw)
  To: Linus Walleij
  Cc: Krzysztof Kozlowski, Mark Brown, Liam Girdwood, Mark Brown,
	linux-kernel, linux-gpio, Krzysztof Kozlowski, Sangbeom Kim,
	Chanwoo Choi, linux-kernel

The patch

   regulator: s2mps11: Pass descriptor instead of GPIO number

has been applied to the regulator tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 0369e02b75e6381f892e3bd45f1d8d6330d855fb Mon Sep 17 00:00:00 2001
From: Linus Walleij <linus.walleij@linaro.org>
Date: Mon, 14 May 2018 10:06:31 +0200
Subject: [PATCH] regulator: s2mps11: Pass descriptor instead of GPIO number

Instead of passing a global GPIO number for the enable GPIO, pass
a descriptor looked up with the standard devm_gpiod_get_optional()
call.

This regulator supports passing platform data, but enable/sleep
regulators are looked up from the device tree exclusively, so
we can need not touch other files.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Tested-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/regulator/s2mps11.c | 46 ++++++++++++++++++-------------------
 1 file changed, 23 insertions(+), 23 deletions(-)

diff --git a/drivers/regulator/s2mps11.c b/drivers/regulator/s2mps11.c
index 7726b874e539..9a1dca26362e 100644
--- a/drivers/regulator/s2mps11.c
+++ b/drivers/regulator/s2mps11.c
@@ -18,7 +18,7 @@
 
 #include <linux/bug.h>
 #include <linux/err.h>
-#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/of.h>
@@ -27,7 +27,6 @@
 #include <linux/regulator/driver.h>
 #include <linux/regulator/machine.h>
 #include <linux/regulator/of_regulator.h>
-#include <linux/of_gpio.h>
 #include <linux/mfd/samsung/core.h>
 #include <linux/mfd/samsung/s2mps11.h>
 #include <linux/mfd/samsung/s2mps13.h>
@@ -57,7 +56,7 @@ struct s2mps11_info {
 	 * Array (size: number of regulators) with GPIO-s for external
 	 * sleep control.
 	 */
-	int *ext_control_gpio;
+	struct gpio_desc **ext_control_gpiod;
 };
 
 static int get_ramp_delay(int ramp_delay)
@@ -524,7 +523,7 @@ static int s2mps14_regulator_enable(struct regulator_dev *rdev)
 	case S2MPS14X:
 		if (test_bit(rdev_get_id(rdev), s2mps11->suspend_state))
 			val = S2MPS14_ENABLE_SUSPEND;
-		else if (gpio_is_valid(s2mps11->ext_control_gpio[rdev_get_id(rdev)]))
+		else if (s2mps11->ext_control_gpiod[rdev_get_id(rdev)])
 			val = S2MPS14_ENABLE_EXT_CONTROL;
 		else
 			val = rdev->desc->enable_mask;
@@ -818,7 +817,7 @@ static int s2mps14_pmic_enable_ext_control(struct s2mps11_info *s2mps11,
 static void s2mps14_pmic_dt_parse_ext_control_gpio(struct platform_device *pdev,
 		struct of_regulator_match *rdata, struct s2mps11_info *s2mps11)
 {
-	int *gpio = s2mps11->ext_control_gpio;
+	struct gpio_desc **gpio = s2mps11->ext_control_gpiod;
 	unsigned int i;
 	unsigned int valid_regulators[3] = { S2MPS14_LDO10, S2MPS14_LDO11,
 		S2MPS14_LDO12 };
@@ -829,11 +828,20 @@ static void s2mps14_pmic_dt_parse_ext_control_gpio(struct platform_device *pdev,
 		if (!rdata[reg].init_data || !rdata[reg].of_node)
 			continue;
 
-		gpio[reg] = of_get_named_gpio(rdata[reg].of_node,
-				"samsung,ext-control-gpios", 0);
-		if (gpio_is_valid(gpio[reg]))
-			dev_dbg(&pdev->dev, "Using GPIO %d for ext-control over %d/%s\n",
-					gpio[reg], reg, rdata[reg].name);
+		gpio[reg] = devm_gpiod_get_from_of_node(&pdev->dev,
+							rdata[reg].of_node,
+							"samsung,ext-control-gpios",
+							0,
+							GPIOD_OUT_HIGH,
+							"s2mps11-LDO");
+		if (IS_ERR(gpio[reg])) {
+			dev_err(&pdev->dev, "Failed to get control GPIO for %d/%s\n",
+				reg, rdata[reg].name);
+			continue;
+		}
+		if (gpio[reg])
+			dev_dbg(&pdev->dev, "Using GPIO for ext-control over %d/%s\n",
+				reg, rdata[reg].name);
 	}
 }
 
@@ -1139,17 +1147,11 @@ static int s2mps11_pmic_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	s2mps11->ext_control_gpio = devm_kmalloc(&pdev->dev,
-			sizeof(*s2mps11->ext_control_gpio) * rdev_num,
+	s2mps11->ext_control_gpiod = devm_kmalloc(&pdev->dev,
+			sizeof(*s2mps11->ext_control_gpiod) * rdev_num,
 			GFP_KERNEL);
-	if (!s2mps11->ext_control_gpio)
+	if (!s2mps11->ext_control_gpiod)
 		return -ENOMEM;
-	/*
-	 * 0 is a valid GPIO so initialize all GPIO-s to negative value
-	 * to indicate that external control won't be used for this regulator.
-	 */
-	for (i = 0; i < rdev_num; i++)
-		s2mps11->ext_control_gpio[i] = -EINVAL;
 
 	if (!iodev->dev->of_node) {
 		if (iodev->pdata) {
@@ -1179,8 +1181,6 @@ static int s2mps11_pmic_probe(struct platform_device *pdev)
 	config.dev = &pdev->dev;
 	config.regmap = iodev->regmap_pmic;
 	config.driver_data = s2mps11;
-	config.ena_gpio_flags = GPIOF_OUT_INIT_HIGH;
-	config.ena_gpio_initialized = true;
 	for (i = 0; i < rdev_num; i++) {
 		struct regulator_dev *regulator;
 
@@ -1191,7 +1191,7 @@ static int s2mps11_pmic_probe(struct platform_device *pdev)
 			config.init_data = rdata[i].init_data;
 			config.of_node = rdata[i].of_node;
 		}
-		config.ena_gpio = s2mps11->ext_control_gpio[i];
+		config.ena_gpiod = s2mps11->ext_control_gpiod[i];
 
 		regulator = devm_regulator_register(&pdev->dev,
 						&regulators[i], &config);
@@ -1202,7 +1202,7 @@ static int s2mps11_pmic_probe(struct platform_device *pdev)
 			goto out;
 		}
 
-		if (gpio_is_valid(s2mps11->ext_control_gpio[i])) {
+		if (s2mps11->ext_control_gpiod[i]) {
 			ret = s2mps14_pmic_enable_ext_control(s2mps11,
 					regulator);
 			if (ret < 0) {
-- 
2.17.0

^ permalink raw reply	[flat|nested] 54+ messages in thread

* Applied "regulator: tps65090: Pass descriptor instead of GPIO number" to the regulator tree
  2018-02-12 13:17 ` [PATCH 15/21] regulator: tps65090: Pass descriptor instead of GPIO number Linus Walleij
  2018-02-12 14:58   ` Lee Jones
@ 2018-05-24 19:13   ` Mark Brown
  1 sibling, 0 replies; 54+ messages in thread
From: Mark Brown @ 2018-05-24 19:13 UTC (permalink / raw)
  To: Linus Walleij
  Cc: Lee Jones, Mark Brown, Liam Girdwood, Mark Brown, linux-kernel,
	linux-gpio, Lee Jones, linux-kernel

The patch

   regulator: tps65090: Pass descriptor instead of GPIO number

has been applied to the regulator tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 3012e81446d011c1bd99812e562e2292f21060fb Mon Sep 17 00:00:00 2001
From: Linus Walleij <linus.walleij@linaro.org>
Date: Mon, 14 May 2018 10:06:33 +0200
Subject: [PATCH] regulator: tps65090: Pass descriptor instead of GPIO number

Instead of passing a global GPIO number for the enable GPIO, pass
a descriptor looked up from the device tree node for the
regulator.

This regulator supports passing platform data, but enable/sleep
regulators are looked up from the device tree exclusively, so
we can need not touch other files.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/regulator/tps65090-regulator.c | 50 ++++++++++++--------------
 include/linux/mfd/tps65090.h           |  8 +++--
 2 files changed, 28 insertions(+), 30 deletions(-)

diff --git a/drivers/regulator/tps65090-regulator.c b/drivers/regulator/tps65090-regulator.c
index 395f35dc8cdb..2d398fa3b720 100644
--- a/drivers/regulator/tps65090-regulator.c
+++ b/drivers/regulator/tps65090-regulator.c
@@ -19,8 +19,8 @@
 #include <linux/module.h>
 #include <linux/delay.h>
 #include <linux/init.h>
-#include <linux/gpio.h>
-#include <linux/of_gpio.h>
+#include <linux/of.h>
+#include <linux/gpio/consumer.h>
 #include <linux/slab.h>
 #include <linux/err.h>
 #include <linux/platform_device.h>
@@ -300,26 +300,6 @@ static int tps65090_regulator_disable_ext_control(
 	return tps65090_config_ext_control(ri, false);
 }
 
-static void tps65090_configure_regulator_config(
-		struct tps65090_regulator_plat_data *tps_pdata,
-		struct regulator_config *config)
-{
-	if (gpio_is_valid(tps_pdata->gpio)) {
-		int gpio_flag = GPIOF_OUT_INIT_LOW;
-
-		if (tps_pdata->reg_init_data->constraints.always_on ||
-				tps_pdata->reg_init_data->constraints.boot_on)
-			gpio_flag = GPIOF_OUT_INIT_HIGH;
-
-		config->ena_gpio = tps_pdata->gpio;
-		config->ena_gpio_initialized = true;
-		config->ena_gpio_flags = gpio_flag;
-	} else {
-		config->ena_gpio = -EINVAL;
-		config->ena_gpio_initialized = false;
-	}
-}
-
 #ifdef CONFIG_OF
 static struct of_regulator_match tps65090_matches[] = {
 	{ .name = "dcdc1", },
@@ -385,9 +365,26 @@ static struct tps65090_platform_data *tps65090_parse_dt_reg_data(
 		rpdata->enable_ext_control = of_property_read_bool(
 					tps65090_matches[idx].of_node,
 					"ti,enable-ext-control");
-		if (rpdata->enable_ext_control)
-			rpdata->gpio = of_get_named_gpio(np,
-					"dcdc-ext-control-gpios", 0);
+		if (rpdata->enable_ext_control) {
+			enum gpiod_flags gflags;
+
+			if (ri_data->constraints.always_on ||
+			    ri_data->constraints.boot_on)
+				gflags = GPIOD_OUT_HIGH;
+			else
+				gflags = GPIOD_OUT_LOW;
+
+			rpdata->gpiod = devm_gpiod_get_from_of_node(&pdev->dev,
+								    tps65090_matches[idx].of_node,
+								    "dcdc-ext-control-gpios", 0,
+								    gflags,
+								    "tps65090");
+			if (IS_ERR(rpdata->gpiod))
+				return ERR_CAST(rpdata->gpiod);
+			if (!rpdata->gpiod)
+				dev_err(&pdev->dev,
+					"could not find DCDC external control GPIO\n");
+		}
 
 		if (of_property_read_u32(tps65090_matches[idx].of_node,
 					 "ti,overcurrent-wait",
@@ -455,8 +452,7 @@ static int tps65090_regulator_probe(struct platform_device *pdev)
 		 */
 		if (tps_pdata && is_dcdc(num) && tps_pdata->reg_init_data) {
 			if (tps_pdata->enable_ext_control) {
-				tps65090_configure_regulator_config(
-						tps_pdata, &config);
+				config.ena_gpiod = tps_pdata->gpiod;
 				ri->desc->ops = &tps65090_ext_control_ops;
 			} else {
 				ret = tps65090_regulator_disable_ext_control(
diff --git a/include/linux/mfd/tps65090.h b/include/linux/mfd/tps65090.h
index 67d144b3b8f9..f05bf4a146e2 100644
--- a/include/linux/mfd/tps65090.h
+++ b/include/linux/mfd/tps65090.h
@@ -83,6 +83,8 @@ enum {
 #define TPS65090_MAX_REG	TPS65090_REG_AD_OUT2
 #define TPS65090_NUM_REGS	(TPS65090_MAX_REG + 1)
 
+struct gpio_desc;
+
 struct tps65090 {
 	struct device		*dev;
 	struct regmap		*rmap;
@@ -95,8 +97,8 @@ struct tps65090 {
  * @reg_init_data: The regulator init data.
  * @enable_ext_control: Enable extrenal control or not. Only available for
  *     DCDC1, DCDC2 and DCDC3.
- * @gpio: Gpio number if external control is enabled and controlled through
- *     gpio.
+ * @gpiod: Gpio descriptor if external control is enabled and controlled through
+ *     gpio
  * @overcurrent_wait_valid: True if the overcurrent_wait should be applied.
  * @overcurrent_wait: Value to set as the overcurrent wait time.  This is the
  *     actual bitfield value, not a time in ms (valid value are 0 - 3).
@@ -104,7 +106,7 @@ struct tps65090 {
 struct tps65090_regulator_plat_data {
 	struct regulator_init_data *reg_init_data;
 	bool enable_ext_control;
-	int gpio;
+	struct gpio_desc *gpiod;
 	bool overcurrent_wait_valid;
 	int overcurrent_wait;
 };
-- 
2.17.0

^ permalink raw reply	[flat|nested] 54+ messages in thread

* Applied "regulator: s5m8767: Pass descriptor instead of GPIO number" to the regulator tree
  2018-02-12 13:17 ` [PATCH 14/21] regulator: s5m8767: Pass descriptor instead of GPIO number Linus Walleij
  2018-02-12 14:58   ` Lee Jones
@ 2018-05-24 19:13   ` Mark Brown
  1 sibling, 0 replies; 54+ messages in thread
From: Mark Brown @ 2018-05-24 19:13 UTC (permalink / raw)
  To: Linus Walleij
  Cc: Lee Jones, Mark Brown, Liam Girdwood, Mark Brown, linux-kernel,
	linux-gpio, Lee Jones, linux-kernel

The patch

   regulator: s5m8767: Pass descriptor instead of GPIO number

has been applied to the regulator tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 9ae5cc75ceaacf69cc50b9fd4713276c2aa62eb9 Mon Sep 17 00:00:00 2001
From: Linus Walleij <linus.walleij@linaro.org>
Date: Mon, 14 May 2018 10:06:32 +0200
Subject: [PATCH] regulator: s5m8767: Pass descriptor instead of GPIO number

Instead of passing a global GPIO number for the enable GPIO, pass
a descriptor looked up from the device tree node for the
regulator.

This regulator supports passing platform data, but enable/sleep
regulators are looked up from the device tree exclusively, so
we can need not touch other files.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/regulator/s5m8767.c      | 26 +++++++++++++++-----------
 include/linux/mfd/samsung/core.h |  4 +++-
 2 files changed, 18 insertions(+), 12 deletions(-)

diff --git a/drivers/regulator/s5m8767.c b/drivers/regulator/s5m8767.c
index 4836947e1521..b8443a360646 100644
--- a/drivers/regulator/s5m8767.c
+++ b/drivers/regulator/s5m8767.c
@@ -13,6 +13,7 @@
 
 #include <linux/err.h>
 #include <linux/of_gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/driver.h>
@@ -459,15 +460,14 @@ static void s5m8767_regulator_config_ext_control(struct s5m8767_info *s5m8767,
 		return;
 	}
 
-	if (!gpio_is_valid(rdata->ext_control_gpio)) {
+	if (!rdata->ext_control_gpiod) {
 		dev_warn(s5m8767->dev,
 				"ext-control for %s: GPIO not valid, ignoring\n",
-				rdata->reg_node->name);
+			 rdata->reg_node->name);
 		return;
 	}
 
-	config->ena_gpio = rdata->ext_control_gpio;
-	config->ena_gpio_flags = GPIOF_OUT_INIT_HIGH;
+	config->ena_gpiod = rdata->ext_control_gpiod;
 }
 
 /*
@@ -577,8 +577,14 @@ static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
 			continue;
 		}
 
-		rdata->ext_control_gpio = of_get_named_gpio(reg_np,
-			"s5m8767,pmic-ext-control-gpios", 0);
+		rdata->ext_control_gpiod = devm_gpiod_get_from_of_node(&pdev->dev,
+								       reg_np,
+								       "s5m8767,pmic-ext-control-gpios",
+								       0,
+								       GPIOD_OUT_HIGH,
+								       "s5m8767");
+		if (IS_ERR(rdata->ext_control_gpiod))
+			return PTR_ERR(rdata->ext_control_gpiod);
 
 		rdata->id = i;
 		rdata->initdata = of_get_regulator_init_data(
@@ -954,10 +960,8 @@ static int s5m8767_pmic_probe(struct platform_device *pdev)
 		config.driver_data = s5m8767;
 		config.regmap = iodev->regmap_pmic;
 		config.of_node = pdata->regulators[i].reg_node;
-		config.ena_gpio = -EINVAL;
-		config.ena_gpio_flags = 0;
-		config.ena_gpio_initialized = true;
-		if (gpio_is_valid(pdata->regulators[i].ext_control_gpio))
+		config.ena_gpiod = NULL;
+		if (pdata->regulators[i].ext_control_gpiod)
 			s5m8767_regulator_config_ext_control(s5m8767,
 					&pdata->regulators[i], &config);
 
@@ -970,7 +974,7 @@ static int s5m8767_pmic_probe(struct platform_device *pdev)
 			return ret;
 		}
 
-		if (gpio_is_valid(pdata->regulators[i].ext_control_gpio)) {
+		if (pdata->regulators[i].ext_control_gpiod) {
 			ret = s5m8767_enable_ext_control(s5m8767, rdev);
 			if (ret < 0) {
 				dev_err(s5m8767->dev,
diff --git a/include/linux/mfd/samsung/core.h b/include/linux/mfd/samsung/core.h
index 5a23dd4df432..28f4ae76271d 100644
--- a/include/linux/mfd/samsung/core.h
+++ b/include/linux/mfd/samsung/core.h
@@ -39,6 +39,8 @@
 #define STEP_12_5_MV		12500
 #define STEP_6_25_MV		6250
 
+struct gpio_desc;
+
 enum sec_device_type {
 	S5M8751X,
 	S5M8763X,
@@ -151,7 +153,7 @@ struct sec_regulator_data {
 	int				id;
 	struct regulator_init_data	*initdata;
 	struct device_node		*reg_node;
-	int				ext_control_gpio;
+	struct gpio_desc		*ext_control_gpiod;
 };
 
 /*
-- 
2.17.0

^ permalink raw reply	[flat|nested] 54+ messages in thread

* Applied "regulator: pfuze100: Delete reference to ena_gpio" to the regulator tree
  2018-02-12 13:17 ` [PATCH 12/21] regulator: pfuze100: Delete reference to ena_gpio Linus Walleij
@ 2018-05-24 19:14   ` Mark Brown
  0 siblings, 0 replies; 54+ messages in thread
From: Mark Brown @ 2018-05-24 19:14 UTC (permalink / raw)
  To: Linus Walleij
  Cc: Mark Brown, Liam Girdwood, Mark Brown, linux-kernel, linux-gpio,
	linux-kernel

The patch

   regulator: pfuze100: Delete reference to ena_gpio

has been applied to the regulator tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 5389ac0ac7d95cf23a5f4e27430ceb2ed815cd5d Mon Sep 17 00:00:00 2001
From: Linus Walleij <linus.walleij@linaro.org>
Date: Mon, 14 May 2018 10:06:30 +0200
Subject: [PATCH] regulator: pfuze100: Delete reference to ena_gpio

We now pass a GPIO descriptor to the core instead of a global
GPIO number, if this descriptor is NULL the GPIO line is not
used. Just delete the assignment of an invalid GPIO line.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/regulator/pfuze100-regulator.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/regulator/pfuze100-regulator.c b/drivers/regulator/pfuze100-regulator.c
index 26a5cd9b4637..8d9dbcc775ea 100644
--- a/drivers/regulator/pfuze100-regulator.c
+++ b/drivers/regulator/pfuze100-regulator.c
@@ -651,7 +651,6 @@ static int pfuze100_regulator_probe(struct i2c_client *client,
 		config.init_data = init_data;
 		config.driver_data = pfuze_chip;
 		config.of_node = match_of_node(i);
-		config.ena_gpio = -EINVAL;
 
 		pfuze_chip->regulators[i] =
 			devm_regulator_register(&client->dev, desc, &config);
-- 
2.17.0

^ permalink raw reply	[flat|nested] 54+ messages in thread

* Applied "regulator: max8952: Pass descriptor instead of GPIO number" to the regulator tree
  2018-02-12 13:17 ` [PATCH 11/21] regulator: max8952: Pass descriptor instead of GPIO number Linus Walleij
@ 2018-05-24 19:14   ` Mark Brown
  0 siblings, 0 replies; 54+ messages in thread
From: Mark Brown @ 2018-05-24 19:14 UTC (permalink / raw)
  To: Linus Walleij
  Cc: Mark Brown, Liam Girdwood, Mark Brown, linux-kernel, linux-gpio,
	MyungJoo Ham, linux-kernel

The patch

   regulator: max8952: Pass descriptor instead of GPIO number

has been applied to the regulator tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From d7a261c2d1f233260c48651b4e68987ce1206139 Mon Sep 17 00:00:00 2001
From: Linus Walleij <linus.walleij@linaro.org>
Date: Mon, 14 May 2018 10:06:29 +0200
Subject: [PATCH] regulator: max8952: Pass descriptor instead of GPIO number

Instead of passing a global GPIO number for the enable GPIO, pass
a descriptor looked up with the standard devm_gpiod_get_optional()
call.

All users of this regulator use device tree so the transition is
pretty smooth.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/regulator/max8952.c       | 18 +++++++++++++-----
 include/linux/regulator/max8952.h |  1 -
 2 files changed, 13 insertions(+), 6 deletions(-)

diff --git a/drivers/regulator/max8952.c b/drivers/regulator/max8952.c
index 1096546c05e9..f1e77ed5dfec 100644
--- a/drivers/regulator/max8952.c
+++ b/drivers/regulator/max8952.c
@@ -27,6 +27,7 @@
 #include <linux/regulator/driver.h>
 #include <linux/regulator/max8952.h>
 #include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/io.h>
 #include <linux/of.h>
 #include <linux/of_gpio.h>
@@ -148,7 +149,6 @@ static struct max8952_platform_data *max8952_parse_dt(struct device *dev)
 
 	pd->gpio_vid0 = of_get_named_gpio(np, "max8952,vid-gpios", 0);
 	pd->gpio_vid1 = of_get_named_gpio(np, "max8952,vid-gpios", 1);
-	pd->gpio_en = of_get_named_gpio(np, "max8952,en-gpio", 0);
 
 	if (of_property_read_u32(np, "max8952,default-mode", &pd->default_mode))
 		dev_warn(dev, "Default mode not specified, assuming 0\n");
@@ -197,6 +197,8 @@ static int max8952_pmic_probe(struct i2c_client *client,
 	struct regulator_config config = { };
 	struct max8952_data *max8952;
 	struct regulator_dev *rdev;
+	struct gpio_desc *gpiod;
+	enum gpiod_flags gflags;
 
 	int ret = 0, err = 0;
 
@@ -224,11 +226,17 @@ static int max8952_pmic_probe(struct i2c_client *client,
 	config.driver_data = max8952;
 	config.of_node = client->dev.of_node;
 
-	config.ena_gpio = pdata->gpio_en;
-	if (client->dev.of_node)
-		config.ena_gpio_initialized = true;
 	if (pdata->reg_data->constraints.boot_on)
-		config.ena_gpio_flags |= GPIOF_OUT_INIT_HIGH;
+		gflags = GPIOD_OUT_HIGH;
+	else
+		gflags = GPIOD_OUT_LOW;
+	gpiod = devm_gpiod_get_optional(&client->dev,
+					"max8952,en",
+					gflags);
+	if (IS_ERR(gpiod))
+		return PTR_ERR(gpiod);
+	if (gpiod)
+		config.ena_gpiod = gpiod;
 
 	rdev = devm_regulator_register(&client->dev, &regulator, &config);
 	if (IS_ERR(rdev)) {
diff --git a/include/linux/regulator/max8952.h b/include/linux/regulator/max8952.h
index 4dbb63a1d4ab..686c42c041b5 100644
--- a/include/linux/regulator/max8952.h
+++ b/include/linux/regulator/max8952.h
@@ -120,7 +120,6 @@ enum {
 struct max8952_platform_data {
 	int gpio_vid0;
 	int gpio_vid1;
-	int gpio_en;
 
 	u32 default_mode;
 	u32 dvs_mode[MAX8952_NUM_DVS_MODE]; /* MAX8952_DVS_MODEx_XXXXmV */
-- 
2.17.0

^ permalink raw reply	[flat|nested] 54+ messages in thread

* Applied "regulator: lp8788-ldo: Pass descriptor instead of GPIO number" to the regulator tree
  2018-02-12 13:17 ` [PATCH 10/21] regulator: lp8788-ldo: Pass descriptor instead of GPIO number Linus Walleij
  2018-02-12 14:59   ` Lee Jones
@ 2018-05-24 19:14   ` Mark Brown
  1 sibling, 0 replies; 54+ messages in thread
From: Mark Brown @ 2018-05-24 19:14 UTC (permalink / raw)
  To: Linus Walleij
  Cc: Lee Jones, Mark Brown, Liam Girdwood, Mark Brown, linux-kernel,
	linux-gpio, Milo Kim, Lee Jones, linux-kernel

The patch

   regulator: lp8788-ldo: Pass descriptor instead of GPIO number

has been applied to the regulator tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 2468f0d51548b23507ceb3bba5f4e3acaea117ba Mon Sep 17 00:00:00 2001
From: Linus Walleij <linus.walleij@linaro.org>
Date: Mon, 14 May 2018 10:06:28 +0200
Subject: [PATCH] regulator: lp8788-ldo: Pass descriptor instead of GPIO number

Instead of passing a global GPIO number, pass a descriptor looked
up with the standard devm_gpiod_get_index_optional() call.

This driver has supported passing a LDO enable GPIO for years,
yet this facility has never been put to use in the upstream kernel.
If someone desires to put in place GPIO control for the LDOs,
this can be done by adding a GPIO descriptor table in the MFD
nexus in drivers/mfd/lp8788.c for the LDO device when spawning the
MFD children, or using a board file.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/regulator/lp8788-ldo.c | 32 ++++++++++++++++----------------
 include/linux/mfd/lp8788.h     | 16 ----------------
 2 files changed, 16 insertions(+), 32 deletions(-)

diff --git a/drivers/regulator/lp8788-ldo.c b/drivers/regulator/lp8788-ldo.c
index cbfd35873575..f2347474a106 100644
--- a/drivers/regulator/lp8788-ldo.c
+++ b/drivers/regulator/lp8788-ldo.c
@@ -16,7 +16,7 @@
 #include <linux/err.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/driver.h>
-#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/mfd/lp8788.h>
 
 /* register address */
@@ -85,8 +85,6 @@
 #define LP8788_STARTUP_TIME_S		3
 
 #define ENABLE_TIME_USEC		32
-#define ENABLE				GPIOF_OUT_INIT_HIGH
-#define DISABLE				GPIOF_OUT_INIT_LOW
 
 enum lp8788_ldo_id {
 	DLDO1,
@@ -117,7 +115,7 @@ struct lp8788_ldo {
 	struct lp8788 *lp;
 	struct regulator_desc *desc;
 	struct regulator_dev *regulator;
-	struct lp8788_ldo_enable_pin *en_pin;
+	struct gpio_desc *ena_gpiod;
 };
 
 /* DLDO 1, 2, 3, 9 voltage table */
@@ -469,7 +467,6 @@ static int lp8788_config_ldo_enable_mode(struct platform_device *pdev,
 					enum lp8788_ldo_id id)
 {
 	struct lp8788 *lp = ldo->lp;
-	struct lp8788_platform_data *pdata = lp->pdata;
 	enum lp8788_ext_ldo_en_id enable_id;
 	u8 en_mask[] = {
 		[EN_ALDO1]   = LP8788_EN_SEL_ALDO1_M,
@@ -504,11 +501,18 @@ static int lp8788_config_ldo_enable_mode(struct platform_device *pdev,
 		return 0;
 	}
 
-	/* if no platform data for ldo pin, then set default enable mode */
-	if (!pdata || !pdata->ldo_pin || !pdata->ldo_pin[enable_id])
+	/* FIXME: check default mode for GPIO here: high or low? */
+	ldo->ena_gpiod = devm_gpiod_get_index_optional(&pdev->dev,
+						       "enable",
+						       enable_id,
+						       GPIOD_OUT_HIGH);
+	if (IS_ERR(ldo->ena_gpiod))
+		return PTR_ERR(ldo->ena_gpiod);
+
+	/* if no GPIO for ldo pin, then set default enable mode */
+	if (!ldo->ena_gpiod)
 		goto set_default_ldo_enable_mode;
 
-	ldo->en_pin = pdata->ldo_pin[enable_id];
 	return 0;
 
 set_default_ldo_enable_mode:
@@ -533,10 +537,8 @@ static int lp8788_dldo_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	if (ldo->en_pin) {
-		cfg.ena_gpio = ldo->en_pin->gpio;
-		cfg.ena_gpio_flags = ldo->en_pin->init_state;
-	}
+	if (ldo->ena_gpiod)
+		cfg.ena_gpiod = ldo->ena_gpiod;
 
 	cfg.dev = pdev->dev.parent;
 	cfg.init_data = lp->pdata ? lp->pdata->dldo_data[id] : NULL;
@@ -582,10 +584,8 @@ static int lp8788_aldo_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	if (ldo->en_pin) {
-		cfg.ena_gpio = ldo->en_pin->gpio;
-		cfg.ena_gpio_flags = ldo->en_pin->init_state;
-	}
+	if (ldo->ena_gpiod)
+		cfg.ena_gpiod = ldo->ena_gpiod;
 
 	cfg.dev = pdev->dev.parent;
 	cfg.init_data = lp->pdata ? lp->pdata->aldo_data[id] : NULL;
diff --git a/include/linux/mfd/lp8788.h b/include/linux/mfd/lp8788.h
index 786bf6679a28..2010e0de3e34 100644
--- a/include/linux/mfd/lp8788.h
+++ b/include/linux/mfd/lp8788.h
@@ -181,20 +181,6 @@ struct lp8788_buck2_dvs {
 	enum lp8788_dvs_sel vsel;
 };
 
-/*
- * struct lp8788_ldo_enable_pin
- *
- *   Basically, all LDOs are enabled through the I2C commands.
- *   But ALDO 1 ~ 5, 7, DLDO 7, 9, 11 can be enabled by external gpio pins.
- *
- * @gpio         : gpio number which is used for enabling ldos
- * @init_state   : initial gpio state (ex. GPIOF_OUT_INIT_LOW)
- */
-struct lp8788_ldo_enable_pin {
-	int gpio;
-	int init_state;
-};
-
 /*
  * struct lp8788_chg_param
  * @addr         : charging control register address (range : 0x11 ~ 0x1C)
@@ -288,7 +274,6 @@ struct lp8788_vib_platform_data {
  * @aldo_data    : regulator initial data for analog ldo
  * @buck1_dvs    : gpio configurations for buck1 dvs
  * @buck2_dvs    : gpio configurations for buck2 dvs
- * @ldo_pin      : gpio configurations for enabling LDOs
  * @chg_pdata    : platform data for charger driver
  * @alarm_sel    : rtc alarm selection (1 or 2)
  * @bl_pdata     : configurable data for backlight driver
@@ -306,7 +291,6 @@ struct lp8788_platform_data {
 	struct regulator_init_data *aldo_data[LP8788_NUM_ALDOS];
 	struct lp8788_buck1_dvs *buck1_dvs;
 	struct lp8788_buck2_dvs *buck2_dvs;
-	struct lp8788_ldo_enable_pin *ldo_pin[EN_LDOS_MAX];
 
 	/* charger */
 	struct lp8788_charger_platform_data *chg_pdata;
-- 
2.17.0

^ permalink raw reply	[flat|nested] 54+ messages in thread

* Applied "regulator: lm363x: Pass descriptor instead of GPIO number" to the regulator tree
  2018-02-12 13:17 ` [PATCH 09/21] regulator: lm363x: " Linus Walleij
@ 2018-05-24 19:14   ` Mark Brown
  0 siblings, 0 replies; 54+ messages in thread
From: Mark Brown @ 2018-05-24 19:14 UTC (permalink / raw)
  To: Linus Walleij
  Cc: Mark Brown, Liam Girdwood, Mark Brown, linux-kernel, linux-gpio,
	Milo Kim, linux-kernel

The patch

   regulator: lm363x: Pass descriptor instead of GPIO number

has been applied to the regulator tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From b2d751b7f69b352de0280d2279765a9506ed54f0 Mon Sep 17 00:00:00 2001
From: Linus Walleij <linus.walleij@linaro.org>
Date: Mon, 14 May 2018 10:06:27 +0200
Subject: [PATCH] regulator: lm363x: Pass descriptor instead of GPIO number

Instead of passing a global GPIO number, pass a descriptor looked
up with the standard devm_gpiod_get_index_optional() call.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/regulator/lm363x-regulator.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/drivers/regulator/lm363x-regulator.c b/drivers/regulator/lm363x-regulator.c
index ce5f7d9ad475..b615a413ca9f 100644
--- a/drivers/regulator/lm363x-regulator.c
+++ b/drivers/regulator/lm363x-regulator.c
@@ -16,7 +16,7 @@
 #include <linux/mfd/ti-lmu-register.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/of_gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/driver.h>
 #include <linux/regulator/of_regulator.h>
@@ -219,7 +219,7 @@ static const struct regulator_desc lm363x_regulator_desc[] = {
 	},
 };
 
-static int lm363x_regulator_of_get_enable_gpio(struct device_node *np, int id)
+static struct gpio_desc *lm363x_regulator_of_get_enable_gpio(struct device *dev, int id)
 {
 	/*
 	 * Check LCM_EN1/2_GPIO is configured.
@@ -227,11 +227,11 @@ static int lm363x_regulator_of_get_enable_gpio(struct device_node *np, int id)
 	 */
 	switch (id) {
 	case LM3632_LDO_POS:
-		return of_get_named_gpio(np, "enable-gpios", 0);
+		return devm_gpiod_get_index_optional(dev, "enable", 0, GPIOD_OUT_LOW);
 	case LM3632_LDO_NEG:
-		return of_get_named_gpio(np, "enable-gpios", 1);
+		return devm_gpiod_get_index_optional(dev, "enable", 1, GPIOD_OUT_LOW);
 	default:
-		return -EINVAL;
+		return NULL;
 	}
 }
 
@@ -243,7 +243,8 @@ static int lm363x_regulator_probe(struct platform_device *pdev)
 	struct regulator_dev *rdev;
 	struct device *dev = &pdev->dev;
 	int id = pdev->id;
-	int ret, ena_gpio;
+	struct gpio_desc *gpiod;
+	int ret;
 
 	cfg.dev = dev;
 	cfg.regmap = regmap;
@@ -252,10 +253,9 @@ static int lm363x_regulator_probe(struct platform_device *pdev)
 	 * LM3632 LDOs can be controlled by external pin.
 	 * Register update is required if the pin is used.
 	 */
-	ena_gpio = lm363x_regulator_of_get_enable_gpio(dev->of_node, id);
-	if (gpio_is_valid(ena_gpio)) {
-		cfg.ena_gpio = ena_gpio;
-		cfg.ena_gpio_flags = GPIOF_OUT_INIT_LOW;
+	gpiod = lm363x_regulator_of_get_enable_gpio(dev, id);
+	if (gpiod) {
+		cfg.ena_gpiod = gpiod;
 
 		ret = regmap_update_bits(regmap, LM3632_REG_BIAS_CONFIG,
 					 LM3632_EXT_EN_MASK,
-- 
2.17.0

^ permalink raw reply	[flat|nested] 54+ messages in thread

* Applied "regulator: max8973: Pass descriptor instead of GPIO number" to the regulator tree
  2018-02-12 13:17 ` [PATCH 07/21] regulator: max8973: Pass descriptor instead of GPIO number Linus Walleij
@ 2018-05-24 19:14   ` Mark Brown
  0 siblings, 0 replies; 54+ messages in thread
From: Mark Brown @ 2018-05-24 19:14 UTC (permalink / raw)
  To: Linus Walleij
  Cc: Mark Brown, Liam Girdwood, Mark Brown, linux-kernel, linux-gpio,
	Mikko Perttunen, Laxman Dewangan, linux-kernel

The patch

   regulator: max8973: Pass descriptor instead of GPIO number

has been applied to the regulator tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From e7d2be696faa3c8add5b21006ad8fec6b6ed85f1 Mon Sep 17 00:00:00 2001
From: Linus Walleij <linus.walleij@linaro.org>
Date: Mon, 14 May 2018 10:06:25 +0200
Subject: [PATCH] regulator: max8973: Pass descriptor instead of GPIO number

Instead of passing a global GPIO number, pass a descriptor looked
up with the standard devm_gpiod_get_optional() call.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/regulator/max8973-regulator.c | 54 ++++++++++++++-------------
 1 file changed, 29 insertions(+), 25 deletions(-)

diff --git a/drivers/regulator/max8973-regulator.c b/drivers/regulator/max8973-regulator.c
index e0c747aa9f85..7cd493ec6315 100644
--- a/drivers/regulator/max8973-regulator.c
+++ b/drivers/regulator/max8973-regulator.c
@@ -34,6 +34,7 @@
 #include <linux/regulator/max8973-regulator.h>
 #include <linux/regulator/of_regulator.h>
 #include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/of_gpio.h>
 #include <linux/i2c.h>
 #include <linux/slab.h>
@@ -114,7 +115,6 @@ struct max8973_chip {
 	struct regulator_desc desc;
 	struct regmap *regmap;
 	bool enable_external_control;
-	int enable_gpio;
 	int dvs_gpio;
 	int lru_index[MAX8973_MAX_VOUT_REG];
 	int curr_vout_val[MAX8973_MAX_VOUT_REG];
@@ -567,7 +567,6 @@ static struct max8973_regulator_platform_data *max8973_parse_dt(
 
 	pdata->enable_ext_control = of_property_read_bool(np,
 						"maxim,externally-enable");
-	pdata->enable_gpio = of_get_named_gpio(np, "maxim,enable-gpio", 0);
 	pdata->dvs_gpio = of_get_named_gpio(np, "maxim,dvs-gpio", 0);
 
 	ret = of_property_read_u32(np, "maxim,dvs-default-state", &pval);
@@ -633,6 +632,8 @@ static int max8973_probe(struct i2c_client *client,
 	struct max8973_chip *max;
 	bool pdata_from_dt = false;
 	unsigned int chip_id;
+	struct gpio_desc *gpiod;
+	enum gpiod_flags gflags;
 	int ret;
 
 	pdata = dev_get_platdata(&client->dev);
@@ -647,8 +648,7 @@ static int max8973_probe(struct i2c_client *client,
 		return -EIO;
 	}
 
-	if ((pdata->dvs_gpio == -EPROBE_DEFER) ||
-		(pdata->enable_gpio == -EPROBE_DEFER))
+	if (pdata->dvs_gpio == -EPROBE_DEFER)
 		return -EPROBE_DEFER;
 
 	max = devm_kzalloc(&client->dev, sizeof(*max), GFP_KERNEL);
@@ -696,15 +696,11 @@ static int max8973_probe(struct i2c_client *client,
 	max->desc.n_voltages = MAX8973_BUCK_N_VOLTAGE;
 
 	max->dvs_gpio = (pdata->dvs_gpio) ? pdata->dvs_gpio : -EINVAL;
-	max->enable_gpio = (pdata->enable_gpio) ? pdata->enable_gpio : -EINVAL;
 	max->enable_external_control = pdata->enable_ext_control;
 	max->curr_gpio_val = pdata->dvs_def_state;
 	max->curr_vout_reg = MAX8973_VOUT + pdata->dvs_def_state;
 	max->junction_temp_warning = pdata->junction_temp_warning;
 
-	if (gpio_is_valid(max->enable_gpio))
-		max->enable_external_control = true;
-
 	max->lru_index[0] = max->curr_vout_reg;
 
 	if (gpio_is_valid(max->dvs_gpio)) {
@@ -757,27 +753,35 @@ static int max8973_probe(struct i2c_client *client,
 			break;
 		}
 
-		if (gpio_is_valid(max->enable_gpio)) {
-			config.ena_gpio_flags = GPIOF_OUT_INIT_LOW;
-			if (ridata && (ridata->constraints.always_on ||
-					ridata->constraints.boot_on))
-				config.ena_gpio_flags = GPIOF_OUT_INIT_HIGH;
-			config.ena_gpio = max->enable_gpio;
+		if (ridata && (ridata->constraints.always_on ||
+			       ridata->constraints.boot_on))
+			gflags = GPIOD_OUT_HIGH;
+		else
+			gflags = GPIOD_OUT_LOW;
+		gpiod = devm_gpiod_get_optional(&client->dev,
+						"maxim,enable",
+						gflags);
+		if (IS_ERR(gpiod))
+			return PTR_ERR(gpiod);
+		if (gpiod) {
+			config.ena_gpiod = gpiod;
+			max->enable_external_control = true;
 		}
+
 		break;
 
 	case MAX77621:
-		if (gpio_is_valid(max->enable_gpio)) {
-			ret = devm_gpio_request_one(&client->dev,
-					max->enable_gpio, GPIOF_OUT_INIT_HIGH,
-					"max8973-en-gpio");
-			if (ret) {
-				dev_err(&client->dev,
-					"gpio_request for gpio %d failed: %d\n",
-					max->enable_gpio, ret);
-				return ret;
-			}
-		}
+		/*
+		 * We do not let the core switch this regulator on/off,
+		 * we just leave it on.
+		 */
+		gpiod = devm_gpiod_get_optional(&client->dev,
+						"maxim,enable",
+						GPIOD_OUT_HIGH);
+		if (IS_ERR(gpiod))
+			return PTR_ERR(gpiod);
+		if (gpiod)
+			max->enable_external_control = true;
 
 		max->desc.enable_reg = MAX8973_VOUT;
 		max->desc.enable_mask = MAX8973_VOUT_ENABLE;
-- 
2.17.0

^ permalink raw reply	[flat|nested] 54+ messages in thread

* Applied "regulator: gpio: Get enable GPIO using GPIO descriptor" to the regulator tree
  2018-02-12 13:16 ` [PATCH 03/21] regulator: gpio: Get enable GPIO using GPIO descriptor Linus Walleij
@ 2018-05-29 14:59   ` Mark Brown
  0 siblings, 0 replies; 54+ messages in thread
From: Mark Brown @ 2018-05-29 14:59 UTC (permalink / raw)
  To: Linus Walleij
  Cc: Philipp Zabel, Mark Brown, Liam Girdwood, Mark Brown,
	linux-kernel, linux-gpio, Philipp Zabel, linux-kernel

The patch

   regulator: gpio: Get enable GPIO using GPIO descriptor

has been applied to the regulator tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 37bed97f00734ce329495823d9682181028b51e4 Mon Sep 17 00:00:00 2001
From: Linus Walleij <linus.walleij@linaro.org>
Date: Mon, 14 May 2018 10:06:23 +0200
Subject: [PATCH] regulator: gpio: Get enable GPIO using GPIO descriptor

We augment the GPIO regulator to get the *enable* regulator
GPIO line (not the other lines) using a descriptor rather than
a global number.

We then pass this into the regulator core which has been
prepared to hande enable descriptors in a separate patch.

Switch over the two boardfiles using this facility and clean
up so we only pass descriptors around.

Cc: Philipp Zabel <philipp.zabel@gmail.com> # HX4700/Magician maintainer
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 arch/arm/mach-pxa/hx4700.c               | 12 +++++++++++-
 arch/arm/mach-pxa/magician.c             | 11 ++++++++++-
 drivers/regulator/gpio-regulator.c       | 23 +++++++++++------------
 include/linux/regulator/gpio-regulator.h |  3 ---
 4 files changed, 32 insertions(+), 17 deletions(-)

diff --git a/arch/arm/mach-pxa/hx4700.c b/arch/arm/mach-pxa/hx4700.c
index e2e7f247a645..6717a10180eb 100644
--- a/arch/arm/mach-pxa/hx4700.c
+++ b/arch/arm/mach-pxa/hx4700.c
@@ -20,6 +20,7 @@
 #include <linux/delay.h>
 #include <linux/fb.h>
 #include <linux/gpio.h>
+#include <linux/gpio/machine.h>
 #include <linux/gpio_keys.h>
 #include <linux/input.h>
 #include <linux/input/navpoint.h>
@@ -711,7 +712,6 @@ static struct gpio_regulator_state bq24022_states[] = {
 static struct gpio_regulator_config bq24022_info = {
 	.supply_name = "bq24022",
 
-	.enable_gpio = GPIO72_HX4700_BQ24022_nCHARGE_EN,
 	.enable_high = 0,
 	.enabled_at_boot = 0,
 
@@ -733,6 +733,15 @@ static struct platform_device bq24022 = {
 	},
 };
 
+static struct gpiod_lookup_table bq24022_gpiod_table = {
+	.dev_id = "gpio-regulator",
+	.table = {
+		GPIO_LOOKUP("gpio-pxa", GPIO72_HX4700_BQ24022_nCHARGE_EN,
+			    "enable", GPIO_ACTIVE_HIGH),
+		{ },
+	},
+};
+
 /*
  * StrataFlash
  */
@@ -875,6 +884,7 @@ static void __init hx4700_init(void)
 	pxa_set_btuart_info(NULL);
 	pxa_set_stuart_info(NULL);
 
+	gpiod_add_lookup_table(&bq24022_gpiod_table);
 	platform_add_devices(devices, ARRAY_SIZE(devices));
 	pwm_add_table(hx4700_pwm_lookup, ARRAY_SIZE(hx4700_pwm_lookup));
 
diff --git a/arch/arm/mach-pxa/magician.c b/arch/arm/mach-pxa/magician.c
index 14c0f80bc9e7..9a5bda3ea194 100644
--- a/arch/arm/mach-pxa/magician.c
+++ b/arch/arm/mach-pxa/magician.c
@@ -657,7 +657,6 @@ static struct gpio_regulator_state bq24022_states[] = {
 static struct gpio_regulator_config bq24022_info = {
 	.supply_name		= "bq24022",
 
-	.enable_gpio		= GPIO30_MAGICIAN_BQ24022_nCHARGE_EN,
 	.enable_high		= 0,
 	.enabled_at_boot	= 1,
 
@@ -679,6 +678,15 @@ static struct platform_device bq24022 = {
 	},
 };
 
+static struct gpiod_lookup_table bq24022_gpiod_table = {
+	.dev_id = "gpio-regulator",
+	.table = {
+		GPIO_LOOKUP("gpio-pxa", GPIO30_MAGICIAN_BQ24022_nCHARGE_EN,
+			    "enable", GPIO_ACTIVE_HIGH),
+		{ },
+	},
+};
+
 /*
  * fixed regulator for ads7846
  */
@@ -1007,6 +1015,7 @@ static void __init magician_init(void)
 	regulator_register_always_on(0, "power", pwm_backlight_supply,
 		ARRAY_SIZE(pwm_backlight_supply), 5000000);
 
+	gpiod_add_lookup_table(&bq24022_gpiod_table);
 	platform_add_devices(ARRAY_AND_SIZE(devices));
 }
 
diff --git a/drivers/regulator/gpio-regulator.c b/drivers/regulator/gpio-regulator.c
index a86b8997bb54..9d6094c4d71c 100644
--- a/drivers/regulator/gpio-regulator.c
+++ b/drivers/regulator/gpio-regulator.c
@@ -31,6 +31,7 @@
 #include <linux/regulator/of_regulator.h>
 #include <linux/regulator/gpio-regulator.h>
 #include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/slab.h>
 #include <linux/of.h>
 #include <linux/of_gpio.h>
@@ -161,10 +162,6 @@ of_get_gpio_regulator_config(struct device *dev, struct device_node *np,
 
 	of_property_read_u32(np, "startup-delay-us", &config->startup_delay);
 
-	config->enable_gpio = of_get_named_gpio(np, "enable-gpio", 0);
-	if (config->enable_gpio < 0 && config->enable_gpio != -ENOENT)
-		return ERR_PTR(config->enable_gpio);
-
 	/* Fetch GPIOs. - optional property*/
 	ret = of_gpio_count(np);
 	if ((ret < 0) && (ret != -ENOENT))
@@ -255,6 +252,7 @@ static int gpio_regulator_probe(struct platform_device *pdev)
 	struct device_node *np = pdev->dev.of_node;
 	struct gpio_regulator_data *drvdata;
 	struct regulator_config cfg = { };
+	enum gpiod_flags gflags;
 	int ptr, ret, state;
 
 	drvdata = devm_kzalloc(&pdev->dev, sizeof(struct gpio_regulator_data),
@@ -340,21 +338,22 @@ static int gpio_regulator_probe(struct platform_device *pdev)
 	cfg.driver_data = drvdata;
 	cfg.of_node = np;
 
-	if (gpio_is_valid(config->enable_gpio)) {
-		cfg.ena_gpio = config->enable_gpio;
-		cfg.ena_gpio_initialized = true;
-	}
 	cfg.ena_gpio_invert = !config->enable_high;
 	if (config->enabled_at_boot) {
 		if (config->enable_high)
-			cfg.ena_gpio_flags |= GPIOF_OUT_INIT_HIGH;
+			gflags = GPIOD_OUT_HIGH;
 		else
-			cfg.ena_gpio_flags |= GPIOF_OUT_INIT_LOW;
+			gflags = GPIOD_OUT_LOW;
 	} else {
 		if (config->enable_high)
-			cfg.ena_gpio_flags |= GPIOF_OUT_INIT_LOW;
+			gflags = GPIOD_OUT_LOW;
 		else
-			cfg.ena_gpio_flags |= GPIOF_OUT_INIT_HIGH;
+			gflags = GPIOD_OUT_HIGH;
+	}
+	cfg.ena_gpiod = devm_gpiod_get_optional(&pdev->dev, "enable", gflags);
+	if (IS_ERR(cfg.ena_gpiod)) {
+		ret = PTR_ERR(cfg.ena_gpiod);
+		goto err_stategpio;
 	}
 
 	drvdata->dev = regulator_register(&drvdata->desc, &cfg);
diff --git a/include/linux/regulator/gpio-regulator.h b/include/linux/regulator/gpio-regulator.h
index 19fbd267406d..536cab86f2d5 100644
--- a/include/linux/regulator/gpio-regulator.h
+++ b/include/linux/regulator/gpio-regulator.h
@@ -44,8 +44,6 @@ struct gpio_regulator_state {
 /**
  * struct gpio_regulator_config - config structure
  * @supply_name:	Name of the regulator supply
- * @enable_gpio:	GPIO to use for enable control
- *			set to -EINVAL if not used
  * @enable_high:	Polarity of enable GPIO
  *			1 = Active high, 0 = Active low
  * @enabled_at_boot:	Whether regulator has been enabled at
@@ -69,7 +67,6 @@ struct gpio_regulator_state {
 struct gpio_regulator_config {
 	const char *supply_name;
 
-	int enable_gpio;
 	unsigned enable_high:1;
 	unsigned enabled_at_boot:1;
 	unsigned startup_delay;
-- 
2.17.0

^ permalink raw reply	[flat|nested] 54+ messages in thread

end of thread, other threads:[~2018-05-29 15:00 UTC | newest]

Thread overview: 54+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-02-12 13:16 [PATCH 00/21] regulator: switch core to GPIO descriptors Linus Walleij
2018-02-12 13:16 ` [PATCH 01/21] regulator: core: Support passing an initialized GPIO enable descriptor Linus Walleij
2018-02-16 17:12   ` Applied "regulator: core: Support passing an initialized GPIO enable descriptor" to the regulator tree Mark Brown
2018-02-12 13:16 ` [PATCH 02/21] regulator: fixed: Convert to use GPIO descriptor only Linus Walleij
2018-02-12 15:13   ` Andy Shevchenko
2018-04-19 12:36     ` Linus Walleij
2018-02-12 13:16 ` [PATCH 03/21] regulator: gpio: Get enable GPIO using GPIO descriptor Linus Walleij
2018-05-29 14:59   ` Applied "regulator: gpio: Get enable GPIO using GPIO descriptor" to the regulator tree Mark Brown
2018-02-12 13:17 ` [PATCH 04/21] regulator: da9055: Pass descriptor instead of GPIO number Linus Walleij
2018-02-12 14:59   ` Lee Jones
2018-02-16 17:12   ` Applied "regulator: da9055: Pass descriptor instead of GPIO number" to the regulator tree Mark Brown
2018-02-12 13:17 ` [PATCH 05/21] regulator: arizona-ldo1: Look up a descriptor and pass to the core Linus Walleij
2018-02-13 11:06   ` Charles Keepax
2018-04-19 13:43     ` Linus Walleij
2018-04-19 15:02       ` Charles Keepax
2018-02-13 11:51   ` Charles Keepax
2018-02-12 13:17 ` [PATCH 06/21] regulator: da9211: Pass descriptors instead of GPIO numbers Linus Walleij
2018-02-16 17:12   ` Applied "regulator: da9211: Pass descriptors instead of GPIO numbers" to the regulator tree Mark Brown
2018-02-12 13:17 ` [PATCH 07/21] regulator: max8973: Pass descriptor instead of GPIO number Linus Walleij
2018-05-24 19:14   ` Applied "regulator: max8973: Pass descriptor instead of GPIO number" to the regulator tree Mark Brown
2018-02-12 13:17 ` [PATCH 08/21] regulator: max77686: Pass descriptor instead of GPIO number Linus Walleij
2018-02-12 13:37   ` Krzysztof Kozlowski
2018-02-12 13:17 ` [PATCH 09/21] regulator: lm363x: " Linus Walleij
2018-05-24 19:14   ` Applied "regulator: lm363x: Pass descriptor instead of GPIO number" to the regulator tree Mark Brown
2018-02-12 13:17 ` [PATCH 10/21] regulator: lp8788-ldo: Pass descriptor instead of GPIO number Linus Walleij
2018-02-12 14:59   ` Lee Jones
2018-05-24 19:14   ` Applied "regulator: lp8788-ldo: Pass descriptor instead of GPIO number" to the regulator tree Mark Brown
2018-02-12 13:17 ` [PATCH 11/21] regulator: max8952: Pass descriptor instead of GPIO number Linus Walleij
2018-05-24 19:14   ` Applied "regulator: max8952: Pass descriptor instead of GPIO number" to the regulator tree Mark Brown
2018-02-12 13:17 ` [PATCH 12/21] regulator: pfuze100: Delete reference to ena_gpio Linus Walleij
2018-05-24 19:14   ` Applied "regulator: pfuze100: Delete reference to ena_gpio" to the regulator tree Mark Brown
2018-02-12 13:17 ` [PATCH 13/21] regulator: s2mps11: Pass descriptor instead of GPIO number Linus Walleij
2018-05-17 16:41   ` Applied "regulator: s2mps11: Pass descriptor instead of GPIO number" to the regulator tree Mark Brown
2018-02-12 13:17 ` [PATCH 14/21] regulator: s5m8767: Pass descriptor instead of GPIO number Linus Walleij
2018-02-12 14:58   ` Lee Jones
2018-05-24 19:13   ` Applied "regulator: s5m8767: Pass descriptor instead of GPIO number" to the regulator tree Mark Brown
2018-02-12 13:17 ` [PATCH 15/21] regulator: tps65090: Pass descriptor instead of GPIO number Linus Walleij
2018-02-12 14:58   ` Lee Jones
2018-05-24 19:13   ` Applied "regulator: tps65090: Pass descriptor instead of GPIO number" to the regulator tree Mark Brown
2018-02-12 13:17 ` [PATCH 16/21] regulator: wm8994: Pass descriptor instead of GPIO number Linus Walleij
2018-02-12 14:58   ` Lee Jones
2018-02-13 11:11   ` Charles Keepax
2018-04-19 13:55     ` Linus Walleij
2018-04-19 14:05       ` Mark Brown
2018-04-19 15:01       ` [PATCH] ARM: s3c64xx: Tidy up handling of regulator GPIO lookups Charles Keepax
2018-05-14  5:54         ` Linus Walleij
2018-02-13 11:52   ` [PATCH 16/21] regulator: wm8994: Pass descriptor instead of GPIO number Charles Keepax
2018-02-12 13:17 ` [PATCH 17/21] regulator: core: Only support passing enable GPIO descriptors Linus Walleij
2018-02-12 13:17 ` [PATCH 18/21] regulator: fixed/gpio: Pull inversion/OD into gpiolib Linus Walleij
2018-02-17  9:59   ` Robert Jarzmik
2018-02-12 13:17 ` [PATCH 19/21] regulator: fixed/gpio: Update device tree bindings Linus Walleij
2018-02-19  2:41   ` Rob Herring
2018-02-12 13:17 ` [PATCH 20/21] regulator: gpio: Convert to fully use descriptors Linus Walleij
2018-02-12 13:17 ` [PATCH 21/21] regulator: gpio: Simplify probe path Linus Walleij

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).