LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Jacopo Mondi <jacopo+renesas@jmondi.org>
To: hans.verkuil@cisco.com, mchehab@kernel.org, robh+dt@kernel.org
Cc: Jacopo Mondi <jacopo+renesas@jmondi.org>,
	linux-media@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH 2/2] media: i2c: mt9t112: Add device tree support
Date: Wed, 25 Apr 2018 13:00:14 +0200	[thread overview]
Message-ID: <1524654014-17852-3-git-send-email-jacopo+renesas@jmondi.org> (raw)
In-Reply-To: <1524654014-17852-1-git-send-email-jacopo+renesas@jmondi.org>

Add support for OF systems to mt9t112 image sensor driver.

As the devicetree bindings use standard name for 'powerdown' gpio, and while
at there, update the existing mt9t112 users to use the new name.

Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
---
 arch/sh/boards/mach-ecovec24/setup.c |  4 +-
 drivers/media/i2c/mt9t112.c          | 87 +++++++++++++++++++++++++++++++-----
 2 files changed, 77 insertions(+), 14 deletions(-)

diff --git a/arch/sh/boards/mach-ecovec24/setup.c b/arch/sh/boards/mach-ecovec24/setup.c
index adc61d1..16de9ec 100644
--- a/arch/sh/boards/mach-ecovec24/setup.c
+++ b/arch/sh/boards/mach-ecovec24/setup.c
@@ -480,7 +480,7 @@ static struct gpiod_lookup_table tw9910_gpios = {
 static struct gpiod_lookup_table mt9t112_0_gpios = {
 	.dev_id		= "0-003c",
 	.table		= {
-		GPIO_LOOKUP("sh7724_pfc", GPIO_PTA3, "standby",
+		GPIO_LOOKUP("sh7724_pfc", GPIO_PTA3, "powerdown",
 			    GPIO_ACTIVE_HIGH),
 	},
 };
@@ -488,7 +488,7 @@ static struct gpiod_lookup_table mt9t112_0_gpios = {
 static struct gpiod_lookup_table mt9t112_1_gpios = {
 	.dev_id		= "1-003c",
 	.table		= {
-		GPIO_LOOKUP("sh7724_pfc", GPIO_PTA4, "standby",
+		GPIO_LOOKUP("sh7724_pfc", GPIO_PTA4, "powerdown",
 			    GPIO_ACTIVE_HIGH),
 	},
 };
diff --git a/drivers/media/i2c/mt9t112.c b/drivers/media/i2c/mt9t112.c
index af8cca9..704e7fb 100644
--- a/drivers/media/i2c/mt9t112.c
+++ b/drivers/media/i2c/mt9t112.c
@@ -32,6 +32,7 @@

 #include <media/i2c/mt9t112.h>
 #include <media/v4l2-common.h>
+#include <media/v4l2-fwnode.h>
 #include <media/v4l2-image-sizes.h>
 #include <media/v4l2-subdev.h>

@@ -77,6 +78,15 @@
 #define VAR(id, offset)  _VAR(id, offset, 0x0000)
 #define VAR8(id, offset) _VAR(id, offset, 0x8000)

+/*
+ * Default PLL configuration for 24MHz input clock
+ */
+static struct mt9t112_platform_data mt9t112_default_pdata_24MHz = {
+	.divider	= {
+		0x49, 0x6, 0, 6, 0, 9, 9, 6, 0,
+	},
+};
+
 /************************************************************************
  *			struct
  ***********************************************************************/
@@ -88,6 +98,7 @@ struct mt9t112_format {
 };

 struct mt9t112_priv {
+	struct device			*dev;
 	struct v4l2_subdev		 subdev;
 	struct mt9t112_platform_data	*info;
 	struct i2c_client		*client;
@@ -1066,13 +1077,39 @@ static int mt9t112_camera_probe(struct i2c_client *client)
 	return ret;
 }

+static int mt9t112_parse_dt(struct mt9t112_priv *priv)
+{
+	struct fwnode_handle *fwnode = dev_fwnode(priv->dev);
+	struct fwnode_handle *ep;
+	struct v4l2_fwnode_endpoint vep;
+	int ret;
+
+	ep = fwnode_graph_get_next_endpoint(fwnode, NULL);
+	if (IS_ERR_OR_NULL(ep)) {
+		dev_err(priv->dev, "No endpoint registered\n");
+		return PTR_ERR(ep);
+	}
+
+	ret = v4l2_fwnode_endpoint_parse(ep, &vep);
+	fwnode_handle_put(ep);
+	if (ret) {
+		dev_err(priv->dev, "Unable to parse endpoint: %d\n", ret);
+		return ret;
+	}
+
+	if (vep.bus.parallel.flags & V4L2_MBUS_PCLK_SAMPLE_RISING)
+		priv->info->flags = MT9T112_FLAG_PCLK_RISING_EDGE;
+
+	return 0;
+}
+
 static int mt9t112_probe(struct i2c_client *client,
 			 const struct i2c_device_id *did)
 {
 	struct mt9t112_priv *priv;
 	int ret;

-	if (!client->dev.platform_data) {
+	if (!client->dev.of_node && !client->dev.platform_data) {
 		dev_err(&client->dev, "mt9t112: missing platform data!\n");
 		return -EINVAL;
 	}
@@ -1081,23 +1118,39 @@ static int mt9t112_probe(struct i2c_client *client,
 	if (!priv)
 		return -ENOMEM;

-	priv->info = client->dev.platform_data;
 	priv->init_done = false;
-
-	v4l2_i2c_subdev_init(&priv->subdev, client, &mt9t112_subdev_ops);
-
-	priv->clk = devm_clk_get(&client->dev, "extclk");
-	if (PTR_ERR(priv->clk) == -ENOENT) {
+	priv->dev = &client->dev;
+
+	if (client->dev.platform_data) {
+		priv->info = client->dev.platform_data;
+
+		priv->clk = devm_clk_get(&client->dev, "extclk");
+		if (PTR_ERR(priv->clk) == -ENOENT) {
+			priv->clk = NULL;
+		} else if (IS_ERR(priv->clk)) {
+			dev_err(&client->dev,
+				"Unable to get clock \"extclk\"\n");
+			return PTR_ERR(priv->clk);
+		}
+	} else {
+		/*
+		 * External clock frequencies != 24MHz are only supported
+		 * for non-OF systems.
+		 */
 		priv->clk = NULL;
-	} else if (IS_ERR(priv->clk)) {
-		dev_err(&client->dev, "Unable to get clock \"extclk\"\n");
-		return PTR_ERR(priv->clk);
+		priv->info = &mt9t112_default_pdata_24MHz;
+
+		ret = mt9t112_parse_dt(priv);
+		if (ret)
+			return ret;
 	}

-	priv->standby_gpio = devm_gpiod_get_optional(&client->dev, "standby",
+	v4l2_i2c_subdev_init(&priv->subdev, client, &mt9t112_subdev_ops);
+
+	priv->standby_gpio = devm_gpiod_get_optional(&client->dev, "powerdown",
 						     GPIOD_OUT_HIGH);
 	if (IS_ERR(priv->standby_gpio)) {
-		dev_err(&client->dev, "Unable to get gpio \"standby\"\n");
+		dev_err(&client->dev, "Unable to get gpio \"powerdown\"\n");
 		return PTR_ERR(priv->standby_gpio);
 	}

@@ -1124,9 +1177,19 @@ static const struct i2c_device_id mt9t112_id[] = {
 };
 MODULE_DEVICE_TABLE(i2c, mt9t112_id);

+#if IS_ENABLED(CONFIG_OF)
+static const struct of_device_id mt9t112_of_match[] = {
+	{ .compatible = "micron,mt9t111", },
+	{ .compatible = "micron,mt9t112", },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, mt9t112_of_match);
+#endif
+
 static struct i2c_driver mt9t112_i2c_driver = {
 	.driver = {
 		.name = "mt9t112",
+		.of_match_table = of_match_ptr(mt9t112_of_match),
 	},
 	.probe    = mt9t112_probe,
 	.remove   = mt9t112_remove,
--
2.7.4

  parent reply	other threads:[~2018-04-25 11:00 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-25 11:00 [PATCH 0/2] media: i2c: mt9t112: Add OF " Jacopo Mondi
2018-04-25 11:00 ` [PATCH 1/2] dt-bindings: media: i2c: Add mt9t111 image sensor Jacopo Mondi
2018-05-01 14:28   ` Rob Herring
2018-05-07  9:17   ` Sakari Ailus
2018-04-25 11:00 ` Jacopo Mondi [this message]
2018-05-07  9:32   ` [PATCH 2/2] media: i2c: mt9t112: Add device tree support Sakari Ailus
2018-05-14 14:30     ` jacopo mondi
2018-05-14 21:50       ` Sakari Ailus
2018-05-15  7:10         ` jacopo mondi

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1524654014-17852-3-git-send-email-jacopo+renesas@jmondi.org \
    --to=jacopo+renesas@jmondi.org \
    --cc=devicetree@vger.kernel.org \
    --cc=hans.verkuil@cisco.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-media@vger.kernel.org \
    --cc=mchehab@kernel.org \
    --cc=robh+dt@kernel.org \
    --subject='Re: [PATCH 2/2] media: i2c: mt9t112: Add device tree support' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

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).