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* [PATCH v6 0/9]  Add support for Hikey 970 PCIe
@ 2021-07-20  8:09 Mauro Carvalho Chehab
  2021-07-20  8:09 ` [PATCH v6 1/9] PCI: kirin: Reorganize the PHY logic inside the driver Mauro Carvalho Chehab
                   ` (8 more replies)
  0 siblings, 9 replies; 12+ messages in thread
From: Mauro Carvalho Chehab @ 2021-07-20  8:09 UTC (permalink / raw)
  To: Bjorn Helgaas, Rob Herring
  Cc: linuxarm, mauro.chehab, Mauro Carvalho Chehab,
	Krzysztof Wilczyński, Binghui Wang, Gustavo Pimentel,
	Jingoo Han, Rob Herring, Xiaowei Song, devicetree,
	linux-arm-kernel, linux-kernel, linux-pci, linux-phy,
	Greg Kroah-Hartman

This series depends on this one:
	https://lore.kernel.org/lkml/cover.1626515862.git.mchehab+huawei@kernel.org/

It is available, with its patch dependencies against v5.14-rc1 at:
	https://github.com/mchehab/linux/commits/pcie-alternate

This series add support at the pcie-kirin dirver for it to use a separate PHY driver.

Yet, in order to preserve the existing DT schema for Kirin 960, it keeps the
Kirin 960 PHY inside the pci driver. I tried to find a way to split it while keeping
the DT schema backward-compatible, but currently the PHY core doesn't allow
that, as it relies on a "phy" property at the pcie node in order to recognize the
PHY driver.

Once the pci-kiring is modified to support an external PHY driver, add a
Kirin 970 PHY and add the needed properties for the HiKey 970 board to
detect the PCIe.

It should be noticed that the HiKey 970 design uses 4 different GPIO pins, one 
for each PERST# signal for each PCIe bus device:

    - GPIO 56 has a pullup logic from 1V8 to 2V5
      connected to a PCIe bridge chip (PEX 8606);
    - GPIO 25 has a pullup logic from 1V8 to 3V3
      connected to the PERST# pin at the M.2 slot;
    - GPIO 220 has a pullup logic from 1V8 to 3V3
      connected to the PERST# pin at the PCIe mini slot;
    - GPIO 203 has a pullup logic from 1V8 to 3V3
      connected to the PERST# pin at the Ethernet chipset.

At the first versions, those were mapped as part of the pci-bus, but the
pci-bus.yaml schema only allows a single PERST# GPIO. So, on v5, those
were moved to the PHY DT schema. However, as Rob complained, on this
version, I opted to add a separate patch (the last one) that moves those
back to the PCIe of-node. 

If such patch 09/09 is accepted, then this patch for the DT schema should 
also be accepted:

   https://github.com/devicetree-org/dt-schema/pull/56

Tested on Hikey970:

  $ lspci
  00:00.0 PCI bridge: Huawei Technologies Co., Ltd. Device 3670 (rev 01)
  01:00.0 PCI bridge: PLX Technology, Inc. PEX 8606 6 Lane, 6 Port PCI Express Gen 2 (5.0 GT/s) Switch (rev ba)
  02:01.0 PCI bridge: PLX Technology, Inc. PEX 8606 6 Lane, 6 Port PCI Express Gen 2 (5.0 GT/s) Switch (rev ba)
  02:04.0 PCI bridge: PLX Technology, Inc. PEX 8606 6 Lane, 6 Port PCI Express Gen 2 (5.0 GT/s) Switch (rev ba)
  02:05.0 PCI bridge: PLX Technology, Inc. PEX 8606 6 Lane, 6 Port PCI Express Gen 2 (5.0 GT/s) Switch (rev ba)
  02:07.0 PCI bridge: PLX Technology, Inc. PEX 8606 6 Lane, 6 Port PCI Express Gen 2 (5.0 GT/s) Switch (rev ba)
  02:09.0 PCI bridge: PLX Technology, Inc. PEX 8606 6 Lane, 6 Port PCI Express Gen 2 (5.0 GT/s) Switch (rev ba)
  06:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 07)

  $ ethtool enp6s0
  Settings for enp6s0:
	Supported ports: [ TP	 MII ]
	Supported link modes:   10baseT/Half 10baseT/Full
	                        100baseT/Half 100baseT/Full
	                        1000baseT/Half 1000baseT/Full
	Supported pause frame use: Symmetric Receive-only
	Supports auto-negotiation: Yes
	Supported FEC modes: Not reported
	Advertised link modes:  10baseT/Half 10baseT/Full
	                        100baseT/Half 100baseT/Full
	                        1000baseT/Half 1000baseT/Full
	Advertised pause frame use: Symmetric Receive-only
	Advertised auto-negotiation: Yes
	Advertised FEC modes: Not reported
	Link partner advertised link modes:  10baseT/Half 10baseT/Full
	                                     100baseT/Half 100baseT/Full
	Link partner advertised pause frame use: Symmetric Receive-only
	Link partner advertised auto-negotiation: Yes
	Link partner advertised FEC modes: Not reported
	Speed: 100Mb/s
	Duplex: Full
	Auto-negotiation: on
	master-slave cfg: preferred slave
	master-slave status: slave
	Port: Twisted Pair
	PHYAD: 0
	Transceiver: external
	MDI-X: Unknown
  netlink error: Operation not permitted
	Link detected: yes

Also tested  that Hikey 960 keeps being supported:

  $ lspci
  00:00.0 PCI bridge: Huawei Technologies Co., Ltd. Device 3660 (rev 01)

---

v6:
- Use an alternative approach, in order to keep the Kirin 960 PHY internal to 
  the driver, in order to not break the DT schema. The PHY-specific code
  were made self-contained at pcie-kirin, in order to make easier to split
  it in the future, if needed.

v5:
- added "static" to hi3670_pcie_get_eyeparam() declaration on patch 6/8

v4:

- dropped the DTS patch, as it depends on a PMIC-related patch series;
- minor changes at the patch description;
- HiKey and HiSilicon are now using the preferred CamelCase format.

Manivannan Sadhasivam (1):
  arm64: dts: HiSilicon: Add support for HiKey 970 PCIe controller
    hardware

Mauro Carvalho Chehab (8):
  PCI: kirin: Reorganize the PHY logic inside the driver
  PCI: kirin: add support for a PHY layer
  PCI: kirin: Use regmap for APB registers
  dt-bindings: PCI: kirin: Fix compatible string
  dt-bindings: phy: Add bindings for HiKey 970 PCIe PHY
  phy: HiSilicon: Add driver for Kirin 970 PCIe PHY
  dt-bindings: PCI: kirin-pcie.txt: Convert it to yaml
  phy-hi3670-pcie: move reset-gpios to the PCIe DT schema

 .../bindings/pci/hisilicon,kirin-pcie.yaml    |  87 ++
 .../devicetree/bindings/pci/kirin-pcie.txt    |  50 -
 .../devicetree/bindings/pci/snps,dw-pcie.yaml |   2 +-
 .../phy/hisilicon,phy-hi3670-pcie.yaml        |  94 ++
 MAINTAINERS                                   |   2 +-
 arch/arm64/boot/dts/hisilicon/hi3670.dtsi     |  70 ++
 .../boot/dts/hisilicon/hikey970-pmic.dtsi     |   1 -
 drivers/pci/controller/dwc/pcie-kirin.c       | 408 +++++---
 drivers/phy/hisilicon/Kconfig                 |  10 +
 drivers/phy/hisilicon/Makefile                |   1 +
 drivers/phy/hisilicon/phy-hi3670-pcie.c       | 896 ++++++++++++++++++
 11 files changed, 1424 insertions(+), 197 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/pci/hisilicon,kirin-pcie.yaml
 delete mode 100644 Documentation/devicetree/bindings/pci/kirin-pcie.txt
 create mode 100644 Documentation/devicetree/bindings/phy/hisilicon,phy-hi3670-pcie.yaml
 create mode 100644 drivers/phy/hisilicon/phy-hi3670-pcie.c

-- 
2.31.1



^ permalink raw reply	[flat|nested] 12+ messages in thread

* [PATCH v6 1/9] PCI: kirin: Reorganize the PHY logic inside the driver
  2021-07-20  8:09 [PATCH v6 0/9] Add support for Hikey 970 PCIe Mauro Carvalho Chehab
@ 2021-07-20  8:09 ` Mauro Carvalho Chehab
  2021-07-20  8:09 ` [PATCH v6 2/9] PCI: kirin: add support for a PHY layer Mauro Carvalho Chehab
                   ` (7 subsequent siblings)
  8 siblings, 0 replies; 12+ messages in thread
From: Mauro Carvalho Chehab @ 2021-07-20  8:09 UTC (permalink / raw)
  To: Bjorn Helgaas, Rob Herring
  Cc: linuxarm, mauro.chehab, Mauro Carvalho Chehab,
	Krzysztof Wilczyński, Binghui Wang, Bjorn Helgaas,
	Lorenzo Pieralisi, Xiaowei Song, linux-kernel, linux-pci

The pcie-kirin PCIe driver contains internally a PHY interface for
Kirin 960.

As the next patches will add support for using an external PHY
driver, reorganize the driver in a way that the PHY part
will be self-contained.

This could be moved to a separate PHY driver, but a change
like that would mean a non-backward-compatible DT schema
change.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 drivers/pci/controller/dwc/pcie-kirin.c | 298 ++++++++++++++----------
 1 file changed, 173 insertions(+), 125 deletions(-)

diff --git a/drivers/pci/controller/dwc/pcie-kirin.c b/drivers/pci/controller/dwc/pcie-kirin.c
index 026fd1e42a55..b4063a3434df 100644
--- a/drivers/pci/controller/dwc/pcie-kirin.c
+++ b/drivers/pci/controller/dwc/pcie-kirin.c
@@ -28,26 +28,16 @@
 
 #define to_kirin_pcie(x) dev_get_drvdata((x)->dev)
 
-#define REF_CLK_FREQ			100000000
-
 /* PCIe ELBI registers */
 #define SOC_PCIECTRL_CTRL0_ADDR		0x000
 #define SOC_PCIECTRL_CTRL1_ADDR		0x004
-#define SOC_PCIEPHY_CTRL2_ADDR		0x008
-#define SOC_PCIEPHY_CTRL3_ADDR		0x00c
 #define PCIE_ELBI_SLV_DBI_ENABLE	(0x1 << 21)
 
 /* info located in APB */
 #define PCIE_APP_LTSSM_ENABLE	0x01c
-#define PCIE_APB_PHY_CTRL0	0x0
-#define PCIE_APB_PHY_CTRL1	0x4
 #define PCIE_APB_PHY_STATUS0	0x400
 #define PCIE_LINKUP_ENABLE	(0x8020)
 #define PCIE_LTSSM_ENABLE_BIT	(0x1 << 11)
-#define PIPE_CLK_STABLE		(0x1 << 19)
-#define PHY_REF_PAD_BIT		(0x1 << 8)
-#define PHY_PWR_DOWN_BIT	(0x1 << 22)
-#define PHY_RST_ACK_BIT		(0x1 << 16)
 
 /* info located in sysctrl */
 #define SCTRL_PCIE_CMOS_OFFSET	0x60
@@ -60,6 +50,29 @@
 #define PCIE_DEBOUNCE_PARAM	0xF0F400
 #define PCIE_OE_BYPASS		(0x3 << 28)
 
+struct kirin_pcie {
+	struct dw_pcie	*pci;
+	struct phy	*phy;
+	void __iomem	*apb_base;
+	void		*phy_priv;	/* Needed for Kirin 960 PHY */
+};
+
+/*
+ * Kirin 960 PHY. Can't be split into a PHY driver without changing the
+ * DT schema.
+ */
+
+#define REF_CLK_FREQ			100000000
+
+/* PHY info located in APB */
+#define PCIE_APB_PHY_CTRL0	0x0
+#define PCIE_APB_PHY_CTRL1	0x4
+#define PCIE_APB_PHY_STATUS0   0x400
+#define PIPE_CLK_STABLE		BIT(19)
+#define PHY_REF_PAD_BIT		BIT(8)
+#define PHY_PWR_DOWN_BIT	BIT(22)
+#define PHY_RST_ACK_BIT		BIT(16)
+
 /* peri_crg ctrl */
 #define CRGCTRL_PCIE_ASSERT_OFFSET	0x88
 #define CRGCTRL_PCIE_ASSERT_BIT		0x8c000000
@@ -69,8 +82,6 @@
 #define REF_2_PERST_MAX		25000
 #define PERST_2_ACCESS_MIN	10000
 #define PERST_2_ACCESS_MAX	12000
-#define LINK_WAIT_MIN		900
-#define LINK_WAIT_MAX		1000
 #define PIPE_CLK_WAIT_MIN	550
 #define PIPE_CLK_WAIT_MAX	600
 #define TIME_CMOS_MIN		100
@@ -78,118 +89,112 @@
 #define TIME_PHY_PD_MIN		10
 #define TIME_PHY_PD_MAX		11
 
-struct kirin_pcie {
-	struct dw_pcie	*pci;
-	void __iomem	*apb_base;
-	void __iomem	*phy_base;
+struct hi3660_pcie_phy {
+	struct device	*dev;
+	void __iomem	*base;
 	struct regmap	*crgctrl;
 	struct regmap	*sysctrl;
 	struct clk	*apb_sys_clk;
 	struct clk	*apb_phy_clk;
 	struct clk	*phy_ref_clk;
-	struct clk	*pcie_aclk;
-	struct clk	*pcie_aux_clk;
+	struct clk	*aclk;
+	struct clk	*aux_clk;
 	int		gpio_id_reset;
 };
 
-/* Registers in PCIeCTRL */
-static inline void kirin_apb_ctrl_writel(struct kirin_pcie *kirin_pcie,
-					 u32 val, u32 reg)
-{
-	writel(val, kirin_pcie->apb_base + reg);
-}
-
-static inline u32 kirin_apb_ctrl_readl(struct kirin_pcie *kirin_pcie, u32 reg)
-{
-	return readl(kirin_pcie->apb_base + reg);
-}
-
 /* Registers in PCIePHY */
-static inline void kirin_apb_phy_writel(struct kirin_pcie *kirin_pcie,
+static inline void kirin_apb_phy_writel(struct hi3660_pcie_phy *hi3660_pcie_phy,
 					u32 val, u32 reg)
 {
-	writel(val, kirin_pcie->phy_base + reg);
+	writel(val, hi3660_pcie_phy->base + reg);
 }
 
-static inline u32 kirin_apb_phy_readl(struct kirin_pcie *kirin_pcie, u32 reg)
+static inline u32 kirin_apb_phy_readl(struct hi3660_pcie_phy *hi3660_pcie_phy,
+				      u32 reg)
 {
-	return readl(kirin_pcie->phy_base + reg);
+	return readl(hi3660_pcie_phy->base + reg);
 }
 
-static long kirin_pcie_get_clk(struct kirin_pcie *kirin_pcie,
-			       struct platform_device *pdev)
+static int hi3660_pcie_phy_get_clk(struct hi3660_pcie_phy *phy)
 {
-	struct device *dev = &pdev->dev;
+	struct device *dev = phy->dev;
 
-	kirin_pcie->phy_ref_clk = devm_clk_get(dev, "pcie_phy_ref");
-	if (IS_ERR(kirin_pcie->phy_ref_clk))
-		return PTR_ERR(kirin_pcie->phy_ref_clk);
+	phy->phy_ref_clk = devm_clk_get(dev, "pcie_phy_ref");
+	if (IS_ERR(phy->phy_ref_clk))
+		return PTR_ERR(phy->phy_ref_clk);
 
-	kirin_pcie->pcie_aux_clk = devm_clk_get(dev, "pcie_aux");
-	if (IS_ERR(kirin_pcie->pcie_aux_clk))
-		return PTR_ERR(kirin_pcie->pcie_aux_clk);
+	phy->aux_clk = devm_clk_get(dev, "pcie_aux");
+	if (IS_ERR(phy->aux_clk))
+		return PTR_ERR(phy->aux_clk);
 
-	kirin_pcie->apb_phy_clk = devm_clk_get(dev, "pcie_apb_phy");
-	if (IS_ERR(kirin_pcie->apb_phy_clk))
-		return PTR_ERR(kirin_pcie->apb_phy_clk);
+	phy->apb_phy_clk = devm_clk_get(dev, "pcie_apb_phy");
+	if (IS_ERR(phy->apb_phy_clk))
+		return PTR_ERR(phy->apb_phy_clk);
 
-	kirin_pcie->apb_sys_clk = devm_clk_get(dev, "pcie_apb_sys");
-	if (IS_ERR(kirin_pcie->apb_sys_clk))
-		return PTR_ERR(kirin_pcie->apb_sys_clk);
+	phy->apb_sys_clk = devm_clk_get(dev, "pcie_apb_sys");
+	if (IS_ERR(phy->apb_sys_clk))
+		return PTR_ERR(phy->apb_sys_clk);
 
-	kirin_pcie->pcie_aclk = devm_clk_get(dev, "pcie_aclk");
-	if (IS_ERR(kirin_pcie->pcie_aclk))
-		return PTR_ERR(kirin_pcie->pcie_aclk);
+	phy->aclk = devm_clk_get(dev, "pcie_aclk");
+	if (IS_ERR(phy->aclk))
+		return PTR_ERR(phy->aclk);
 
 	return 0;
 }
 
-static long kirin_pcie_get_resource(struct kirin_pcie *kirin_pcie,
-				    struct platform_device *pdev)
+static int hi3660_pcie_phy_get_resource(struct hi3660_pcie_phy *phy)
 {
-	kirin_pcie->apb_base =
-		devm_platform_ioremap_resource_byname(pdev, "apb");
-	if (IS_ERR(kirin_pcie->apb_base))
-		return PTR_ERR(kirin_pcie->apb_base);
-
-	kirin_pcie->phy_base =
-		devm_platform_ioremap_resource_byname(pdev, "phy");
-	if (IS_ERR(kirin_pcie->phy_base))
-		return PTR_ERR(kirin_pcie->phy_base);
-
-	kirin_pcie->crgctrl =
-		syscon_regmap_lookup_by_compatible("hisilicon,hi3660-crgctrl");
-	if (IS_ERR(kirin_pcie->crgctrl))
-		return PTR_ERR(kirin_pcie->crgctrl);
-
-	kirin_pcie->sysctrl =
-		syscon_regmap_lookup_by_compatible("hisilicon,hi3660-sctrl");
-	if (IS_ERR(kirin_pcie->sysctrl))
-		return PTR_ERR(kirin_pcie->sysctrl);
+	struct device *dev = phy->dev;
+	struct platform_device *pdev;
+
+	/* registers */
+	pdev = container_of(dev, struct platform_device, dev);
+
+	phy->base = devm_platform_ioremap_resource_byname(pdev, "phy");
+	if (IS_ERR(phy->base))
+		return PTR_ERR(phy->base);
+
+	phy->crgctrl = syscon_regmap_lookup_by_compatible("hisilicon,hi3660-crgctrl");
+	if (IS_ERR(phy->crgctrl))
+		return PTR_ERR(phy->crgctrl);
+
+	phy->sysctrl = syscon_regmap_lookup_by_compatible("hisilicon,hi3660-sctrl");
+	if (IS_ERR(phy->sysctrl))
+		return PTR_ERR(phy->sysctrl);
+
+	/* gpios */
+	phy->gpio_id_reset = of_get_named_gpio(dev->of_node,
+					       "reset-gpios", 0);
+	if (phy->gpio_id_reset == -EPROBE_DEFER) {
+		return -EPROBE_DEFER;
+	} else if (!gpio_is_valid(phy->gpio_id_reset)) {
+		dev_err(phy->dev, "unable to get a valid gpio pin\n");
+		return -ENODEV;
+	}
 
 	return 0;
 }
 
-static int kirin_pcie_phy_init(struct kirin_pcie *kirin_pcie)
+static int hi3660_pcie_phy_start(struct hi3660_pcie_phy *phy)
 {
-	struct device *dev = kirin_pcie->pci->dev;
+	struct device *dev = phy->dev;
 	u32 reg_val;
 
-	reg_val = kirin_apb_phy_readl(kirin_pcie, PCIE_APB_PHY_CTRL1);
+	reg_val = kirin_apb_phy_readl(phy, PCIE_APB_PHY_CTRL1);
 	reg_val &= ~PHY_REF_PAD_BIT;
-	kirin_apb_phy_writel(kirin_pcie, reg_val, PCIE_APB_PHY_CTRL1);
+	kirin_apb_phy_writel(phy, reg_val, PCIE_APB_PHY_CTRL1);
 
-	reg_val = kirin_apb_phy_readl(kirin_pcie, PCIE_APB_PHY_CTRL0);
+	reg_val = kirin_apb_phy_readl(phy, PCIE_APB_PHY_CTRL0);
 	reg_val &= ~PHY_PWR_DOWN_BIT;
-	kirin_apb_phy_writel(kirin_pcie, reg_val, PCIE_APB_PHY_CTRL0);
+	kirin_apb_phy_writel(phy, reg_val, PCIE_APB_PHY_CTRL0);
 	usleep_range(TIME_PHY_PD_MIN, TIME_PHY_PD_MAX);
 
-	reg_val = kirin_apb_phy_readl(kirin_pcie, PCIE_APB_PHY_CTRL1);
+	reg_val = kirin_apb_phy_readl(phy, PCIE_APB_PHY_CTRL1);
 	reg_val &= ~PHY_RST_ACK_BIT;
-	kirin_apb_phy_writel(kirin_pcie, reg_val, PCIE_APB_PHY_CTRL1);
+	kirin_apb_phy_writel(phy, reg_val, PCIE_APB_PHY_CTRL1);
 
 	usleep_range(PIPE_CLK_WAIT_MIN, PIPE_CLK_WAIT_MAX);
-	reg_val = kirin_apb_phy_readl(kirin_pcie, PCIE_APB_PHY_STATUS0);
+	reg_val = kirin_apb_phy_readl(phy, PCIE_APB_PHY_STATUS0);
 	if (reg_val & PIPE_CLK_STABLE) {
 		dev_err(dev, "PIPE clk is not stable\n");
 		return -EINVAL;
@@ -198,105 +203,157 @@ static int kirin_pcie_phy_init(struct kirin_pcie *kirin_pcie)
 	return 0;
 }
 
-static void kirin_pcie_oe_enable(struct kirin_pcie *kirin_pcie)
+static void hi3660_pcie_phy_oe_enable(struct hi3660_pcie_phy *phy)
 {
 	u32 val;
 
-	regmap_read(kirin_pcie->sysctrl, SCTRL_PCIE_OE_OFFSET, &val);
+	regmap_read(phy->sysctrl, SCTRL_PCIE_OE_OFFSET, &val);
 	val |= PCIE_DEBOUNCE_PARAM;
 	val &= ~PCIE_OE_BYPASS;
-	regmap_write(kirin_pcie->sysctrl, SCTRL_PCIE_OE_OFFSET, val);
+	regmap_write(phy->sysctrl, SCTRL_PCIE_OE_OFFSET, val);
 }
 
-static int kirin_pcie_clk_ctrl(struct kirin_pcie *kirin_pcie, bool enable)
+static int hi3660_pcie_phy_clk_ctrl(struct hi3660_pcie_phy *phy, bool enable)
 {
 	int ret = 0;
 
 	if (!enable)
 		goto close_clk;
 
-	ret = clk_set_rate(kirin_pcie->phy_ref_clk, REF_CLK_FREQ);
+	ret = clk_set_rate(phy->phy_ref_clk, REF_CLK_FREQ);
 	if (ret)
 		return ret;
 
-	ret = clk_prepare_enable(kirin_pcie->phy_ref_clk);
+	ret = clk_prepare_enable(phy->phy_ref_clk);
 	if (ret)
 		return ret;
 
-	ret = clk_prepare_enable(kirin_pcie->apb_sys_clk);
+	ret = clk_prepare_enable(phy->apb_sys_clk);
 	if (ret)
 		goto apb_sys_fail;
 
-	ret = clk_prepare_enable(kirin_pcie->apb_phy_clk);
+	ret = clk_prepare_enable(phy->apb_phy_clk);
 	if (ret)
 		goto apb_phy_fail;
 
-	ret = clk_prepare_enable(kirin_pcie->pcie_aclk);
+	ret = clk_prepare_enable(phy->aclk);
 	if (ret)
 		goto aclk_fail;
 
-	ret = clk_prepare_enable(kirin_pcie->pcie_aux_clk);
+	ret = clk_prepare_enable(phy->aux_clk);
 	if (ret)
 		goto aux_clk_fail;
 
 	return 0;
 
 close_clk:
-	clk_disable_unprepare(kirin_pcie->pcie_aux_clk);
+	clk_disable_unprepare(phy->aux_clk);
 aux_clk_fail:
-	clk_disable_unprepare(kirin_pcie->pcie_aclk);
+	clk_disable_unprepare(phy->aclk);
 aclk_fail:
-	clk_disable_unprepare(kirin_pcie->apb_phy_clk);
+	clk_disable_unprepare(phy->apb_phy_clk);
 apb_phy_fail:
-	clk_disable_unprepare(kirin_pcie->apb_sys_clk);
+	clk_disable_unprepare(phy->apb_sys_clk);
 apb_sys_fail:
-	clk_disable_unprepare(kirin_pcie->phy_ref_clk);
+	clk_disable_unprepare(phy->phy_ref_clk);
 
 	return ret;
 }
 
-static int kirin_pcie_power_on(struct kirin_pcie *kirin_pcie)
+static int hi3660_pcie_phy_power_on(struct kirin_pcie *pcie)
 {
+	struct hi3660_pcie_phy *phy = pcie->phy_priv;
 	int ret;
 
 	/* Power supply for Host */
-	regmap_write(kirin_pcie->sysctrl,
+	regmap_write(phy->sysctrl,
 		     SCTRL_PCIE_CMOS_OFFSET, SCTRL_PCIE_CMOS_BIT);
 	usleep_range(TIME_CMOS_MIN, TIME_CMOS_MAX);
-	kirin_pcie_oe_enable(kirin_pcie);
 
-	ret = kirin_pcie_clk_ctrl(kirin_pcie, true);
+	hi3660_pcie_phy_oe_enable(phy);
+
+	ret = hi3660_pcie_phy_clk_ctrl(phy, true);
 	if (ret)
 		return ret;
 
 	/* ISO disable, PCIeCtrl, PHY assert and clk gate clear */
-	regmap_write(kirin_pcie->sysctrl,
+	regmap_write(phy->sysctrl,
 		     SCTRL_PCIE_ISO_OFFSET, SCTRL_PCIE_ISO_BIT);
-	regmap_write(kirin_pcie->crgctrl,
+	regmap_write(phy->crgctrl,
 		     CRGCTRL_PCIE_ASSERT_OFFSET, CRGCTRL_PCIE_ASSERT_BIT);
-	regmap_write(kirin_pcie->sysctrl,
+	regmap_write(phy->sysctrl,
 		     SCTRL_PCIE_HPCLK_OFFSET, SCTRL_PCIE_HPCLK_BIT);
 
-	ret = kirin_pcie_phy_init(kirin_pcie);
+	ret = hi3660_pcie_phy_start(phy);
 	if (ret)
-		goto close_clk;
+		goto disable_clks;
 
 	/* perst assert Endpoint */
-	if (!gpio_request(kirin_pcie->gpio_id_reset, "pcie_perst")) {
+	if (!gpio_request(phy->gpio_id_reset, "pcie_perst")) {
 		usleep_range(REF_2_PERST_MIN, REF_2_PERST_MAX);
-		ret = gpio_direction_output(kirin_pcie->gpio_id_reset, 1);
+		ret = gpio_direction_output(phy->gpio_id_reset, 1);
 		if (ret)
-			goto close_clk;
+			goto disable_clks;
 		usleep_range(PERST_2_ACCESS_MIN, PERST_2_ACCESS_MAX);
-
 		return 0;
 	}
 
-close_clk:
-	kirin_pcie_clk_ctrl(kirin_pcie, false);
+disable_clks:
+	hi3660_pcie_phy_clk_ctrl(phy, false);
 	return ret;
 }
 
+static int hi3660_pcie_phy_init(struct platform_device *pdev,
+				struct kirin_pcie *pcie)
+{
+	struct device *dev = &pdev->dev;
+	struct hi3660_pcie_phy *phy;
+	int ret;
+
+	phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL);
+	if (!phy)
+		return -ENOMEM;
+
+	pcie->phy_priv = phy;
+	phy->dev = dev;
+
+	/* registers */
+	pdev = container_of(dev, struct platform_device, dev);
+
+	ret = hi3660_pcie_phy_get_clk(phy);
+	if (ret)
+		return ret;
+
+	return hi3660_pcie_phy_get_resource(phy);
+}
+
+/*
+ * The non-PHY part starts here
+ */
+
+/* Registers in PCIeCTRL */
+static inline void kirin_apb_ctrl_writel(struct kirin_pcie *kirin_pcie,
+					 u32 val, u32 reg)
+{
+	writel(val, kirin_pcie->apb_base + reg);
+}
+
+static inline u32 kirin_apb_ctrl_readl(struct kirin_pcie *kirin_pcie, u32 reg)
+{
+	return readl(kirin_pcie->apb_base + reg);
+}
+
+static long kirin_pcie_get_resource(struct kirin_pcie *kirin_pcie,
+				    struct platform_device *pdev)
+{
+	kirin_pcie->apb_base =
+		devm_platform_ioremap_resource_byname(pdev, "apb");
+	if (IS_ERR(kirin_pcie->apb_base))
+		return PTR_ERR(kirin_pcie->apb_base);
+
+	return 0;
+}
+
 static void kirin_pcie_sideband_dbi_w_mode(struct kirin_pcie *kirin_pcie,
 					   bool on)
 {
@@ -444,7 +501,7 @@ static int kirin_pcie_probe(struct platform_device *pdev)
 	pci->pp.ops = &kirin_pcie_host_ops;
 	kirin_pcie->pci = pci;
 
-	ret = kirin_pcie_get_clk(kirin_pcie, pdev);
+	ret = hi3660_pcie_phy_init(pdev, kirin_pcie);
 	if (ret)
 		return ret;
 
@@ -452,16 +509,7 @@ static int kirin_pcie_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	kirin_pcie->gpio_id_reset = of_get_named_gpio(dev->of_node,
-						      "reset-gpios", 0);
-	if (kirin_pcie->gpio_id_reset == -EPROBE_DEFER) {
-		return -EPROBE_DEFER;
-	} else if (!gpio_is_valid(kirin_pcie->gpio_id_reset)) {
-		dev_err(dev, "unable to get a valid gpio pin\n");
-		return -ENODEV;
-	}
-
-	ret = kirin_pcie_power_on(kirin_pcie);
+	ret = hi3660_pcie_phy_power_on(kirin_pcie);
 	if (ret)
 		return ret;
 
@@ -479,8 +527,8 @@ static struct platform_driver kirin_pcie_driver = {
 	.probe			= kirin_pcie_probe,
 	.driver			= {
 		.name			= "kirin-pcie",
-		.of_match_table = kirin_pcie_match,
-		.suppress_bind_attrs = true,
+		.of_match_table		= kirin_pcie_match,
+		.suppress_bind_attrs	= true,
 	},
 };
 builtin_platform_driver(kirin_pcie_driver);
-- 
2.31.1


^ permalink raw reply	[flat|nested] 12+ messages in thread

* [PATCH v6 2/9] PCI: kirin: add support for a PHY layer
  2021-07-20  8:09 [PATCH v6 0/9] Add support for Hikey 970 PCIe Mauro Carvalho Chehab
  2021-07-20  8:09 ` [PATCH v6 1/9] PCI: kirin: Reorganize the PHY logic inside the driver Mauro Carvalho Chehab
@ 2021-07-20  8:09 ` Mauro Carvalho Chehab
  2021-07-20 23:26   ` Bjorn Helgaas
  2021-07-20  8:09 ` [PATCH v6 3/9] PCI: kirin: Use regmap for APB registers Mauro Carvalho Chehab
                   ` (6 subsequent siblings)
  8 siblings, 1 reply; 12+ messages in thread
From: Mauro Carvalho Chehab @ 2021-07-20  8:09 UTC (permalink / raw)
  To: Bjorn Helgaas, Rob Herring
  Cc: linuxarm, mauro.chehab, Mauro Carvalho Chehab,
	Krzysztof Wilczyński, Binghui Wang, Bjorn Helgaas,
	Lorenzo Pieralisi, Xiaowei Song, linux-kernel, linux-pci

While it is too late to remove the Kirin 960 PHY, the driver
should be able to support different PHYs used by other devices.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 drivers/pci/controller/dwc/pcie-kirin.c | 95 +++++++++++++++++++++----
 1 file changed, 80 insertions(+), 15 deletions(-)

diff --git a/drivers/pci/controller/dwc/pcie-kirin.c b/drivers/pci/controller/dwc/pcie-kirin.c
index b4063a3434df..558188476372 100644
--- a/drivers/pci/controller/dwc/pcie-kirin.c
+++ b/drivers/pci/controller/dwc/pcie-kirin.c
@@ -8,16 +8,18 @@
  * Author: Xiaowei Song <songxiaowei@huawei.com>
  */
 
-#include <linux/compiler.h>
 #include <linux/clk.h>
+#include <linux/compiler.h>
 #include <linux/delay.h>
 #include <linux/err.h>
 #include <linux/gpio.h>
 #include <linux/interrupt.h>
 #include <linux/mfd/syscon.h>
 #include <linux/of_address.h>
+#include <linux/of_device.h>
 #include <linux/of_gpio.h>
 #include <linux/of_pci.h>
+#include <linux/phy/phy.h>
 #include <linux/pci.h>
 #include <linux/pci_regs.h>
 #include <linux/platform_device.h>
@@ -50,11 +52,18 @@
 #define PCIE_DEBOUNCE_PARAM	0xF0F400
 #define PCIE_OE_BYPASS		(0x3 << 28)
 
+enum pcie_kirin_phy_type {
+	PCIE_KIRIN_INTERNAL_PHY,
+	PCIE_KIRIN_EXTERNAL_PHY
+};
+
 struct kirin_pcie {
+	enum pcie_kirin_phy_type	type;
+
 	struct dw_pcie	*pci;
 	struct phy	*phy;
 	void __iomem	*apb_base;
-	void		*phy_priv;	/* Needed for Kirin 960 PHY */
+	void		*phy_priv;	/* only for PCIE_KIRIN_INTERNAL_PHY */
 };
 
 /*
@@ -476,8 +485,63 @@ static const struct dw_pcie_host_ops kirin_pcie_host_ops = {
 	.host_init = kirin_pcie_host_init,
 };
 
+static const struct of_device_id kirin_pcie_match[] = {
+	{
+		.compatible = "hisilicon,kirin960-pcie",
+		.data = (void *)PCIE_KIRIN_INTERNAL_PHY
+	},
+	{},
+};
+
+static int kirin_pcie_power_on(struct platform_device *pdev,
+			       struct kirin_pcie *kirin_pcie)
+{
+	struct device *dev = &pdev->dev;
+	int ret;
+
+	if (kirin_pcie->type == PCIE_KIRIN_INTERNAL_PHY) {
+		ret = hi3660_pcie_phy_init(pdev, kirin_pcie);
+		if (ret)
+			return ret;
+
+		return hi3660_pcie_phy_power_on(kirin_pcie);
+	}
+
+	kirin_pcie->phy = devm_of_phy_get(dev, dev->of_node, NULL);
+	if (IS_ERR(kirin_pcie->phy))
+		return PTR_ERR(kirin_pcie->phy);
+
+	ret = phy_init(kirin_pcie->phy);
+	if (ret)
+		goto err;
+
+	ret = phy_power_on(kirin_pcie->phy);
+	if (ret)
+		goto err;
+
+	return 0;
+err:
+	phy_exit(kirin_pcie->phy);
+	return ret;
+}
+
+static int __exit kirin_pcie_remove(struct platform_device *pdev)
+{
+	struct kirin_pcie *kirin_pcie = platform_get_drvdata(pdev);
+
+	if (kirin_pcie->type == PCIE_KIRIN_INTERNAL_PHY)
+		return 0;
+
+	phy_power_off(kirin_pcie->phy);
+	phy_exit(kirin_pcie->phy);
+
+	return 0;
+}
+
 static int kirin_pcie_probe(struct platform_device *pdev)
 {
+	enum pcie_kirin_phy_type phy_type;
+	const struct of_device_id *of_id;
 	struct device *dev = &pdev->dev;
 	struct kirin_pcie *kirin_pcie;
 	struct dw_pcie *pci;
@@ -488,6 +552,14 @@ static int kirin_pcie_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
+	of_id = of_match_device(kirin_pcie_match, dev);
+	if (!of_id) {
+		dev_err(dev, "OF data missing\n");
+		return -EINVAL;
+	}
+
+	phy_type = (enum pcie_kirin_phy_type)of_id->data;
+
 	kirin_pcie = devm_kzalloc(dev, sizeof(struct kirin_pcie), GFP_KERNEL);
 	if (!kirin_pcie)
 		return -ENOMEM;
@@ -500,31 +572,24 @@ static int kirin_pcie_probe(struct platform_device *pdev)
 	pci->ops = &kirin_dw_pcie_ops;
 	pci->pp.ops = &kirin_pcie_host_ops;
 	kirin_pcie->pci = pci;
-
-	ret = hi3660_pcie_phy_init(pdev, kirin_pcie);
-	if (ret)
-		return ret;
+	kirin_pcie->type = phy_type;
 
 	ret = kirin_pcie_get_resource(kirin_pcie, pdev);
 	if (ret)
 		return ret;
 
-	ret = hi3660_pcie_phy_power_on(kirin_pcie);
-	if (ret)
-		return ret;
-
 	platform_set_drvdata(pdev, kirin_pcie);
 
+	ret = kirin_pcie_power_on(pdev, kirin_pcie);
+	if (ret)
+		return ret;
+
 	return dw_pcie_host_init(&pci->pp);
 }
 
-static const struct of_device_id kirin_pcie_match[] = {
-	{ .compatible = "hisilicon,kirin960-pcie" },
-	{},
-};
-
 static struct platform_driver kirin_pcie_driver = {
 	.probe			= kirin_pcie_probe,
+	.remove	        	= __exit_p(kirin_pcie_remove),
 	.driver			= {
 		.name			= "kirin-pcie",
 		.of_match_table		= kirin_pcie_match,
-- 
2.31.1


^ permalink raw reply	[flat|nested] 12+ messages in thread

* [PATCH v6 3/9] PCI: kirin: Use regmap for APB registers
  2021-07-20  8:09 [PATCH v6 0/9] Add support for Hikey 970 PCIe Mauro Carvalho Chehab
  2021-07-20  8:09 ` [PATCH v6 1/9] PCI: kirin: Reorganize the PHY logic inside the driver Mauro Carvalho Chehab
  2021-07-20  8:09 ` [PATCH v6 2/9] PCI: kirin: add support for a PHY layer Mauro Carvalho Chehab
@ 2021-07-20  8:09 ` Mauro Carvalho Chehab
  2021-07-20  8:09 ` [PATCH v6 4/9] dt-bindings: PCI: kirin: Fix compatible string Mauro Carvalho Chehab
                   ` (5 subsequent siblings)
  8 siblings, 0 replies; 12+ messages in thread
From: Mauro Carvalho Chehab @ 2021-07-20  8:09 UTC (permalink / raw)
  To: Bjorn Helgaas, Rob Herring
  Cc: linuxarm, mauro.chehab, Mauro Carvalho Chehab,
	Krzysztof Wilczyński, Binghui Wang, Bjorn Helgaas,
	Lorenzo Pieralisi, Xiaowei Song, linux-kernel, linux-pci

The PHY layer need to access APB registers too, for Kirin 970.
So, place them into a named regmap.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 drivers/pci/controller/dwc/pcie-kirin.c | 39 +++++++++++++++++--------
 1 file changed, 27 insertions(+), 12 deletions(-)

diff --git a/drivers/pci/controller/dwc/pcie-kirin.c b/drivers/pci/controller/dwc/pcie-kirin.c
index 558188476372..d21c332abc06 100644
--- a/drivers/pci/controller/dwc/pcie-kirin.c
+++ b/drivers/pci/controller/dwc/pcie-kirin.c
@@ -61,8 +61,8 @@ struct kirin_pcie {
 	enum pcie_kirin_phy_type	type;
 
 	struct dw_pcie	*pci;
+	struct regmap   *apb;
 	struct phy	*phy;
-	void __iomem	*apb_base;
 	void		*phy_priv;	/* only for PCIE_KIRIN_INTERNAL_PHY */
 };
 
@@ -340,6 +340,13 @@ static int hi3660_pcie_phy_init(struct platform_device *pdev,
  * The non-PHY part starts here
  */
 
+static const struct regmap_config pcie_kirin_regmap_conf = {
+	.name = "kirin_pcie_apb",
+	.reg_bits = 32,
+	.val_bits = 32,
+	.reg_stride = 4,
+};
+
 /* Registers in PCIeCTRL */
 static inline void kirin_apb_ctrl_writel(struct kirin_pcie *kirin_pcie,
 					 u32 val, u32 reg)
@@ -355,10 +362,17 @@ static inline u32 kirin_apb_ctrl_readl(struct kirin_pcie *kirin_pcie, u32 reg)
 static long kirin_pcie_get_resource(struct kirin_pcie *kirin_pcie,
 				    struct platform_device *pdev)
 {
-	kirin_pcie->apb_base =
-		devm_platform_ioremap_resource_byname(pdev, "apb");
-	if (IS_ERR(kirin_pcie->apb_base))
-		return PTR_ERR(kirin_pcie->apb_base);
+	struct device *dev = &pdev->dev;
+	void __iomem *apb_base;
+
+	apb_base = devm_platform_ioremap_resource_byname(pdev, "apb");
+	if (IS_ERR(apb_base))
+		return PTR_ERR(apb_base);
+
+	kirin_pcie->apb = devm_regmap_init_mmio(dev, apb_base,
+						&pcie_kirin_regmap_conf);
+	if (IS_ERR(kirin_pcie->apb))
+		return PTR_ERR(kirin_pcie->apb);
 
 	return 0;
 }
@@ -368,13 +382,13 @@ static void kirin_pcie_sideband_dbi_w_mode(struct kirin_pcie *kirin_pcie,
 {
 	u32 val;
 
-	val = kirin_apb_ctrl_readl(kirin_pcie, SOC_PCIECTRL_CTRL0_ADDR);
+	regmap_read(kirin_pcie->apb, SOC_PCIECTRL_CTRL0_ADDR, &val);
 	if (on)
 		val = val | PCIE_ELBI_SLV_DBI_ENABLE;
 	else
 		val = val & ~PCIE_ELBI_SLV_DBI_ENABLE;
 
-	kirin_apb_ctrl_writel(kirin_pcie, val, SOC_PCIECTRL_CTRL0_ADDR);
+	regmap_write(kirin_pcie->apb, SOC_PCIECTRL_CTRL0_ADDR, val);
 }
 
 static void kirin_pcie_sideband_dbi_r_mode(struct kirin_pcie *kirin_pcie,
@@ -382,13 +396,13 @@ static void kirin_pcie_sideband_dbi_r_mode(struct kirin_pcie *kirin_pcie,
 {
 	u32 val;
 
-	val = kirin_apb_ctrl_readl(kirin_pcie, SOC_PCIECTRL_CTRL1_ADDR);
+	regmap_read(kirin_pcie->apb, SOC_PCIECTRL_CTRL1_ADDR, &val);
 	if (on)
 		val = val | PCIE_ELBI_SLV_DBI_ENABLE;
 	else
 		val = val & ~PCIE_ELBI_SLV_DBI_ENABLE;
 
-	kirin_apb_ctrl_writel(kirin_pcie, val, SOC_PCIECTRL_CTRL1_ADDR);
+	regmap_write(kirin_pcie->apb, SOC_PCIECTRL_CTRL1_ADDR, val);
 }
 
 static int kirin_pcie_rd_own_conf(struct pci_bus *bus, unsigned int devfn,
@@ -448,8 +462,9 @@ static void kirin_pcie_write_dbi(struct dw_pcie *pci, void __iomem *base,
 static int kirin_pcie_link_up(struct dw_pcie *pci)
 {
 	struct kirin_pcie *kirin_pcie = to_kirin_pcie(pci);
-	u32 val = kirin_apb_ctrl_readl(kirin_pcie, PCIE_APB_PHY_STATUS0);
+	u32 val;
 
+	regmap_read(kirin_pcie->apb, PCIE_APB_PHY_STATUS0, &val);
 	if ((val & PCIE_LINKUP_ENABLE) == PCIE_LINKUP_ENABLE)
 		return 1;
 
@@ -461,8 +476,8 @@ static int kirin_pcie_start_link(struct dw_pcie *pci)
 	struct kirin_pcie *kirin_pcie = to_kirin_pcie(pci);
 
 	/* assert LTSSM enable */
-	kirin_apb_ctrl_writel(kirin_pcie, PCIE_LTSSM_ENABLE_BIT,
-			      PCIE_APP_LTSSM_ENABLE);
+	regmap_write(kirin_pcie->apb, PCIE_APP_LTSSM_ENABLE,
+		     PCIE_LTSSM_ENABLE_BIT);
 
 	return 0;
 }
-- 
2.31.1


^ permalink raw reply	[flat|nested] 12+ messages in thread

* [PATCH v6 4/9] dt-bindings: PCI: kirin: Fix compatible string
  2021-07-20  8:09 [PATCH v6 0/9] Add support for Hikey 970 PCIe Mauro Carvalho Chehab
                   ` (2 preceding siblings ...)
  2021-07-20  8:09 ` [PATCH v6 3/9] PCI: kirin: Use regmap for APB registers Mauro Carvalho Chehab
@ 2021-07-20  8:09 ` Mauro Carvalho Chehab
  2021-07-20  8:09 ` [PATCH v6 5/9] dt-bindings: phy: Add bindings for HiKey 970 PCIe PHY Mauro Carvalho Chehab
                   ` (4 subsequent siblings)
  8 siblings, 0 replies; 12+ messages in thread
From: Mauro Carvalho Chehab @ 2021-07-20  8:09 UTC (permalink / raw)
  To: Bjorn Helgaas, Rob Herring
  Cc: linuxarm, mauro.chehab, Mauro Carvalho Chehab, Bjorn Helgaas,
	Rob Herring, devicetree, linux-kernel, linux-pci

The pcie-kirin driver doesn't declare a hisilicon,kirin-pcie.
Also, remove the useless comment after the description, as other
compat will be supported by the same driver in the future.

Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 Documentation/devicetree/bindings/pci/kirin-pcie.txt | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/pci/kirin-pcie.txt b/Documentation/devicetree/bindings/pci/kirin-pcie.txt
index 7db30534498f..7adab8999a6a 100644
--- a/Documentation/devicetree/bindings/pci/kirin-pcie.txt
+++ b/Documentation/devicetree/bindings/pci/kirin-pcie.txt
@@ -9,7 +9,7 @@ Additional properties are described here:
 
 Required properties
 - compatible:
-	"hisilicon,kirin960-pcie" for PCIe of Kirin960 SoC
+	"hisilicon,kirin960-pcie"
 - reg: Should contain rc_dbi, apb, phy, config registers location and length.
 - reg-names: Must include the following entries:
   "dbi": controller configuration registers;
@@ -23,7 +23,7 @@ Optional properties:
 Example based on kirin960:
 
 	pcie@f4000000 {
-		compatible = "hisilicon,kirin-pcie";
+		compatible = "hisilicon,kirin960-pcie";
 		reg = <0x0 0xf4000000 0x0 0x1000>, <0x0 0xff3fe000 0x0 0x1000>,
 		      <0x0 0xf3f20000 0x0 0x40000>, <0x0 0xF4000000 0 0x2000>;
 		reg-names = "dbi","apb","phy", "config";
-- 
2.31.1


^ permalink raw reply	[flat|nested] 12+ messages in thread

* [PATCH v6 5/9] dt-bindings: phy: Add bindings for HiKey 970 PCIe PHY
  2021-07-20  8:09 [PATCH v6 0/9] Add support for Hikey 970 PCIe Mauro Carvalho Chehab
                   ` (3 preceding siblings ...)
  2021-07-20  8:09 ` [PATCH v6 4/9] dt-bindings: PCI: kirin: Fix compatible string Mauro Carvalho Chehab
@ 2021-07-20  8:09 ` Mauro Carvalho Chehab
  2021-07-20 13:11   ` Rob Herring
  2021-07-20  8:09 ` [PATCH v6 6/9] phy: HiSilicon: Add driver for Kirin " Mauro Carvalho Chehab
                   ` (3 subsequent siblings)
  8 siblings, 1 reply; 12+ messages in thread
From: Mauro Carvalho Chehab @ 2021-07-20  8:09 UTC (permalink / raw)
  To: Bjorn Helgaas, Rob Herring
  Cc: linuxarm, mauro.chehab, Mauro Carvalho Chehab,
	Kishon Vijay Abraham I, Rob Herring, Vinod Koul, devicetree,
	linux-kernel, linux-phy

Document the bindings for HiKey 970 (hi3670) PCIe PHY
interface, supported via the pcie-kirin driver.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 .../phy/hisilicon,phy-hi3670-pcie.yaml        | 98 +++++++++++++++++++
 1 file changed, 98 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/phy/hisilicon,phy-hi3670-pcie.yaml

diff --git a/Documentation/devicetree/bindings/phy/hisilicon,phy-hi3670-pcie.yaml b/Documentation/devicetree/bindings/phy/hisilicon,phy-hi3670-pcie.yaml
new file mode 100644
index 000000000000..f88b6b7496bb
--- /dev/null
+++ b/Documentation/devicetree/bindings/phy/hisilicon,phy-hi3670-pcie.yaml
@@ -0,0 +1,98 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/phy/hisilicon,phy-hi3670-pcie.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: HiSilicon Kirin970 PCIe PHY
+
+maintainers:
+  - Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
+
+description: |+
+  Bindings for PCIe PHY on HiSilicon Kirin 970.
+
+properties:
+  compatible:
+    const: hisilicon,hi970-pcie-phy
+
+  "#phy-cells":
+    const: 0
+
+  reg:
+    maxItems: 1
+    description: PHY Control registers
+
+  phy-supply:
+    description: The PCIe PHY power supply
+
+  clocks:
+    items:
+      - description: PCIe PHY clock
+      - description: PCIe AUX clock
+      - description: PCIe APB PHY clock
+      - description: PCIe APB SYS clock
+      - description: PCIe ACLK clock
+
+  clock-names:
+    items:
+      - const: phy_ref
+      - const: aux
+      - const: apb_phy
+      - const: apb_sys
+      - const: aclk
+
+  reset-gpios:
+    description: PCI PERST reset GPIOs
+    maxItems: 4
+
+  clkreq-gpios:
+    description: Clock request GPIOs
+    maxItems: 3
+
+  hisilicon,eye-diagram-param:
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    description: Eye diagram for phy.
+
+required:
+  - "#phy-cells"
+  - compatible
+  - reg
+  - reg-names
+  - clocks
+  - clock-names
+  - reset-gpios
+  - clkreq-gpios
+  - hisilicon,eye-diagram-param
+  - phy-supply
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/hi3670-clock.h>
+
+    bus {
+      #address-cells = <2>;
+      #size-cells = <2>;
+      pcie_phy: pcie-phy@fc000000 {
+        compatible = "hisilicon,hi970-pcie-phy";
+        reg = <0x0 0xfc000000 0x0 0x80000>;
+        reg-names = "phy";
+        #phy-cells = <0>;
+        phy-supply = <&ldo33>;
+        clocks = <&crg_ctrl HI3670_CLK_GATE_PCIEPHY_REF>,
+                 <&crg_ctrl HI3670_CLK_GATE_PCIEAUX>,
+                 <&crg_ctrl HI3670_PCLK_GATE_PCIE_PHY>,
+                 <&crg_ctrl HI3670_PCLK_GATE_PCIE_SYS>,
+                 <&crg_ctrl HI3670_ACLK_GATE_PCIE>;
+        clock-names = "phy_ref", "aux",
+                      "apb_phy", "apb_sys", "aclk";
+        reset-gpios = <&gpio7 0 0 >, <&gpio25 2 0 >,
+                      <&gpio3 1 0 >, <&gpio27 4 0 >;
+        clkreq-gpios = <&gpio20 6 0 >, <&gpio27 3 0 >, <&gpio17 0 0 >;
+        hisilicon,eye-diagram-param = <0xFFFFFFFF 0xFFFFFFFF
+                                       0xFFFFFFFF 0xFFFFFFFF 0xFFFFFFFF>;
+      };
+    };
+...
-- 
2.31.1


^ permalink raw reply	[flat|nested] 12+ messages in thread

* [PATCH v6 6/9] phy: HiSilicon: Add driver for Kirin 970 PCIe PHY
  2021-07-20  8:09 [PATCH v6 0/9] Add support for Hikey 970 PCIe Mauro Carvalho Chehab
                   ` (4 preceding siblings ...)
  2021-07-20  8:09 ` [PATCH v6 5/9] dt-bindings: phy: Add bindings for HiKey 970 PCIe PHY Mauro Carvalho Chehab
@ 2021-07-20  8:09 ` Mauro Carvalho Chehab
  2021-07-20  8:09 ` [PATCH v6 7/9] arm64: dts: HiSilicon: Add support for HiKey 970 PCIe controller hardware Mauro Carvalho Chehab
                   ` (2 subsequent siblings)
  8 siblings, 0 replies; 12+ messages in thread
From: Mauro Carvalho Chehab @ 2021-07-20  8:09 UTC (permalink / raw)
  To: Bjorn Helgaas, Rob Herring
  Cc: linuxarm, mauro.chehab, Mauro Carvalho Chehab,
	Krzysztof Wilczyński, Binghui Wang, Bjorn Helgaas,
	Greg Kroah-Hartman, Kishon Vijay Abraham I, Lorenzo Pieralisi,
	Manivannan Sadhasivam, Vinod Koul, Xiaowei Song, linux-kernel,
	linux-pci, linux-phy

The Kirin 970 PHY is somewhat similar to the Kirin 960, but it
does a lot more. Add the needed bits for PCIe to start working on
HiKey 970 boards.

Co-developed-by: Manivannan Sadhasivam <mani@kernel.org>
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 drivers/pci/controller/dwc/pcie-kirin.c |   4 +
 drivers/phy/hisilicon/Kconfig           |  10 +
 drivers/phy/hisilicon/Makefile          |   1 +
 drivers/phy/hisilicon/phy-hi3670-pcie.c | 892 ++++++++++++++++++++++++
 4 files changed, 907 insertions(+)
 create mode 100644 drivers/phy/hisilicon/phy-hi3670-pcie.c

diff --git a/drivers/pci/controller/dwc/pcie-kirin.c b/drivers/pci/controller/dwc/pcie-kirin.c
index d21c332abc06..7a92f633d746 100644
--- a/drivers/pci/controller/dwc/pcie-kirin.c
+++ b/drivers/pci/controller/dwc/pcie-kirin.c
@@ -505,6 +505,10 @@ static const struct of_device_id kirin_pcie_match[] = {
 		.compatible = "hisilicon,kirin960-pcie",
 		.data = (void *)PCIE_KIRIN_INTERNAL_PHY
 	},
+	{
+		.compatible = "hisilicon,kirin970-pcie",
+		.data = (void *)PCIE_KIRIN_EXTERNAL_PHY
+	},
 	{},
 };
 
diff --git a/drivers/phy/hisilicon/Kconfig b/drivers/phy/hisilicon/Kconfig
index 4d008cfc279c..d3b92c288554 100644
--- a/drivers/phy/hisilicon/Kconfig
+++ b/drivers/phy/hisilicon/Kconfig
@@ -33,6 +33,16 @@ config PHY_HI3670_USB
 
 	  To compile this driver as a module, choose M here.
 
+config PHY_HI3670_PCIE
+	tristate "hi3670 PCIe PHY support"
+	depends on (ARCH_HISI && ARM64) || COMPILE_TEST
+	select GENERIC_PHY
+	select MFD_SYSCON
+	help
+	  Enable this to support the HiSilicon hi3670 PCIe PHY.
+
+	  To compile this driver as a module, choose M here.
+
 config PHY_HISTB_COMBPHY
 	tristate "HiSilicon STB SoCs COMBPHY support"
 	depends on (ARCH_HISI && ARM64) || COMPILE_TEST
diff --git a/drivers/phy/hisilicon/Makefile b/drivers/phy/hisilicon/Makefile
index 51729868145b..4029d3813b1e 100644
--- a/drivers/phy/hisilicon/Makefile
+++ b/drivers/phy/hisilicon/Makefile
@@ -2,6 +2,7 @@
 obj-$(CONFIG_PHY_HI6220_USB)		+= phy-hi6220-usb.o
 obj-$(CONFIG_PHY_HI3660_USB)		+= phy-hi3660-usb3.o
 obj-$(CONFIG_PHY_HI3670_USB)		+= phy-hi3670-usb3.o
+obj-$(CONFIG_PHY_HI3670_PCIE)		+= phy-hi3670-pcie.o
 obj-$(CONFIG_PHY_HISTB_COMBPHY)		+= phy-histb-combphy.o
 obj-$(CONFIG_PHY_HISI_INNO_USB2)	+= phy-hisi-inno-usb2.o
 obj-$(CONFIG_PHY_HIX5HD2_SATA)		+= phy-hix5hd2-sata.o
diff --git a/drivers/phy/hisilicon/phy-hi3670-pcie.c b/drivers/phy/hisilicon/phy-hi3670-pcie.c
new file mode 100644
index 000000000000..e80143df0217
--- /dev/null
+++ b/drivers/phy/hisilicon/phy-hi3670-pcie.c
@@ -0,0 +1,892 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * PCIe phy driver for Kirin 970
+ *
+ * Copyright (C) 2017 HiSilicon Electronics Co., Ltd.
+ *		https://www.huawei.com
+ * Copyright (C) 2021 Huawei Technologies Co., Ltd.
+ *		https://www.huawei.com
+ *
+ * Authors:
+ *	Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
+ *	Manivannan Sadhasivam <mani@kernel.org>
+ *
+ * Based on:
+ * 	https://lore.kernel.org/lkml/4c9d6581478aa966698758c0420933f5defab4dd.1612335031.git.mchehab+huawei@kernel.org/
+ */
+
+#include <linux/clk.h>
+#include <linux/gpio.h>
+#include <linux/kernel.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of_gpio.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#define AXI_CLK_FREQ			207500000
+#define REF_CLK_FREQ			100000000
+
+/* PCIe CTRL registers */
+#define SOC_PCIECTRL_CTRL0_ADDR   0x000
+#define SOC_PCIECTRL_CTRL1_ADDR   0x004
+#define SOC_PCIECTRL_CTRL7_ADDR   0x01c
+#define SOC_PCIECTRL_CTRL12_ADDR  0x030
+#define SOC_PCIECTRL_CTRL20_ADDR  0x050
+#define SOC_PCIECTRL_CTRL21_ADDR  0x054
+#define SOC_PCIECTRL_STATE0_ADDR  0x400
+
+/* PCIe PHY registers */
+#define SOC_PCIEPHY_CTRL0_ADDR    0x000
+#define SOC_PCIEPHY_CTRL1_ADDR    0x004
+#define SOC_PCIEPHY_CTRL2_ADDR    0x008
+#define SOC_PCIEPHY_CTRL3_ADDR    0x00c
+#define SOC_PCIEPHY_CTRL38_ADDR   0x0098
+#define SOC_PCIEPHY_STATE0_ADDR   0x400
+
+#define PCIE_LINKUP_ENABLE            (0x8020)
+#define PCIE_ELBI_SLV_DBI_ENABLE      (0x1 << 21)
+#define PCIE_LTSSM_ENABLE_BIT         (0x1 << 11)
+#define PCIEPHY_RESET_BIT             (0x1 << 17)
+#define PCIEPHY_PIPE_LINE0_RESET_BIT  (0x1 << 19)
+
+#define PORT_MSI_CTRL_ADDR            0x820
+#define PORT_MSI_CTRL_UPPER_ADDR      0x824
+#define PORT_MSI_CTRL_INT0_ENABLE     0x828
+
+#define EYEPARAM_NOCFG 0xFFFFFFFF
+#define RAWLANEN_DIG_PCS_XF_TX_OVRD_IN_1 0x3001
+#define SUP_DIG_LVL_OVRD_IN 0xf
+#define LANEN_DIG_ASIC_TX_OVRD_IN_1 0x1002
+#define LANEN_DIG_ASIC_TX_OVRD_IN_2 0x1003
+
+/* hi3670 pciephy register */
+#define SOC_PCIEPHY_MMC1PLL_CTRL1  0xc04
+#define SOC_PCIEPHY_MMC1PLL_CTRL16 0xC40
+#define SOC_PCIEPHY_MMC1PLL_CTRL17 0xC44
+#define SOC_PCIEPHY_MMC1PLL_CTRL20 0xC50
+#define SOC_PCIEPHY_MMC1PLL_CTRL21 0xC54
+#define SOC_PCIEPHY_MMC1PLL_STAT0  0xE00
+
+#define CRGPERIPH_PEREN12   0x470
+#define CRGPERIPH_PERDIS12  0x474
+#define CRGPERIPH_PCIECTRL0 0x800
+
+/* define ie,oe cfg */
+#define IO_IE_EN_HARD_BYPASS         (0x1 << 27)
+#define IO_OE_EN_HARD_BYPASS         (0x1 << 11)
+#define IO_HARD_CTRL_DEBOUNCE_BYPASS (0x1 << 10)
+#define IO_OE_GT_MODE                (0x2 << 7)
+#define DEBOUNCE_WAITCFG_IN          (0xf << 20)
+#define DEBOUNCE_WAITCFG_OUT         (0xf << 13)
+
+/* noc power domain */
+#define NOC_POWER_IDLEREQ_1 0x38c
+#define NOC_POWER_IDLE_1    0x394
+#define NOC_PW_MASK         0x10000
+#define NOC_PW_SET_BIT      0x1
+
+/* Number of GPIOs required by PHY */
+#define MAX_GPIO_RESETS		4
+#define MAX_GPIO_CLKREQ		3
+#define NUM_EYEPARAM		5
+
+/* info located in sysctrl */
+#define SCTRL_PCIE_CMOS_OFFSET	0x60
+#define SCTRL_PCIE_CMOS_BIT	0x10
+#define SCTRL_PCIE_ISO_OFFSET	0x44
+#define SCTRL_PCIE_ISO_BIT	0x30
+#define SCTRL_PCIE_HPCLK_OFFSET	0x190
+#define SCTRL_PCIE_HPCLK_BIT	0x184000
+#define SCTRL_PCIE_OE_OFFSET	0x14a
+#define PCIE_DEBOUNCE_PARAM	0xF0F400
+#define PCIE_OE_BYPASS		(0x3 << 28)
+
+/* peri_crg ctrl */
+#define CRGCTRL_PCIE_ASSERT_OFFSET	0x88
+#define CRGCTRL_PCIE_ASSERT_BIT		0x8c000000
+
+/* Time for delay */
+#define REF_2_PERST_MIN		20000
+#define REF_2_PERST_MAX		25000
+#define PERST_2_ACCESS_MIN	10000
+#define PERST_2_ACCESS_MAX	12000
+#define PIPE_CLK_WAIT_MIN	550
+#define PIPE_CLK_WAIT_MAX	600
+#define TIME_CMOS_MIN		100
+#define TIME_CMOS_MAX		105
+#define TIME_PHY_PD_MIN		10
+#define TIME_PHY_PD_MAX		11
+
+struct hi3670_pcie_phy {
+	struct device	*dev;
+	void __iomem	*base;
+	struct regmap	*apb;
+	struct regmap	*crgctrl;
+	struct regmap	*sysctrl;
+	struct regmap	*pmctrl;
+	struct clk	*apb_sys_clk;
+	struct clk	*apb_phy_clk;
+	struct clk	*phy_ref_clk;
+	struct clk	*aclk;
+	struct clk	*aux_clk;
+	int		n_gpio_resets;
+	int		n_gpio_clkreq;
+	int		gpio_id_reset[MAX_GPIO_RESETS];
+	const char	*reset_names[MAX_GPIO_RESETS];
+	int		gpio_id_clkreq[MAX_GPIO_CLKREQ];
+	const char	*clkreq_names[MAX_GPIO_CLKREQ];
+	u32		eye_param[NUM_EYEPARAM];
+};
+
+
+/* Registers in PCIePHY */
+static inline void hi3670_apb_phy_writel(struct hi3670_pcie_phy *phy,
+					 u32 val, u32 reg)
+{
+	writel(val, phy->base + 0x40000 + reg);
+}
+
+static inline u32 hi3670_apb_phy_readl(struct hi3670_pcie_phy *phy, u32 reg)
+{
+	return readl(phy->base + 0x40000 + reg);
+}
+
+static inline void kirin_apb_natural_phy_writel(struct hi3670_pcie_phy *phy,
+						u32 val, u32 reg)
+{
+	writel(val, phy->base + reg * 4);
+}
+
+static inline u32 kirin_apb_natural_phy_readl(struct hi3670_pcie_phy *phy,
+					      u32 reg)
+{
+	return readl(phy->base + reg * 4);
+}
+
+static void hi3670_pcie_phy_oe_enable(struct hi3670_pcie_phy *phy)
+{
+	u32 val;
+
+	regmap_read(phy->sysctrl, SCTRL_PCIE_OE_OFFSET, &val);
+	val |= PCIE_DEBOUNCE_PARAM;
+	val &= ~PCIE_OE_BYPASS;
+	regmap_write(phy->sysctrl, SCTRL_PCIE_OE_OFFSET, val);
+}
+
+static void hi3670_pcie_get_eyeparam(struct hi3670_pcie_phy *phy)
+{
+	struct device *dev = phy->dev;
+	struct device_node *np;
+	int ret, i;
+
+	np = dev->of_node;
+
+	ret = of_property_read_u32_array(np, "hisilicon,eye-diagram-param",
+					 phy->eye_param, NUM_EYEPARAM);
+	if (!ret)
+		return;
+
+	/* There's no optional eye_param property. Set array to default */
+	for (i = 0; i < NUM_EYEPARAM; i++)
+		phy->eye_param[i] = EYEPARAM_NOCFG;
+}
+
+static void hi3670_pcie_set_eyeparam(struct hi3670_pcie_phy *phy)
+{
+	u32 val;
+
+	val = kirin_apb_natural_phy_readl(phy, RAWLANEN_DIG_PCS_XF_TX_OVRD_IN_1);
+
+	if (phy->eye_param[1] != EYEPARAM_NOCFG) {
+		val &= (~0xf00);
+		val |= (phy->eye_param[1] << 8) | (0x1 << 12);
+	}
+	kirin_apb_natural_phy_writel(phy, val, RAWLANEN_DIG_PCS_XF_TX_OVRD_IN_1);
+
+	val = kirin_apb_natural_phy_readl(phy, LANEN_DIG_ASIC_TX_OVRD_IN_2);
+	val &= (~0x1FBF);
+	if (phy->eye_param[2] != EYEPARAM_NOCFG)
+		val |= (phy->eye_param[2]<< 0) | (0x1 << 6);
+
+	if (phy->eye_param[3] != EYEPARAM_NOCFG)
+		val |= (phy->eye_param[3] << 7) | (0x1 << 13);
+
+	kirin_apb_natural_phy_writel(phy, val, LANEN_DIG_ASIC_TX_OVRD_IN_2);
+
+	val = kirin_apb_natural_phy_readl(phy, SUP_DIG_LVL_OVRD_IN);
+	if (phy->eye_param[0] != EYEPARAM_NOCFG) {
+		val &= (~0x1C0);
+		val |= (phy->eye_param[0] << 6) | (0x1 << 9);
+	}
+	kirin_apb_natural_phy_writel(phy, val, SUP_DIG_LVL_OVRD_IN);
+
+	val = kirin_apb_natural_phy_readl(phy, LANEN_DIG_ASIC_TX_OVRD_IN_1);
+	if (phy->eye_param[4] != EYEPARAM_NOCFG) {
+		val &= (~0x7E00);
+		val |= (phy->eye_param[4] << 9) | (0x1 << 15);
+	}
+	kirin_apb_natural_phy_writel(phy, val, LANEN_DIG_ASIC_TX_OVRD_IN_1);
+}
+
+static int hi3670_pcie_gpio_request(struct hi3670_pcie_phy *phy,
+				    struct device *dev)
+{
+	int ret, i;
+
+	for (i = 0; i < phy->n_gpio_resets; i++) {
+		if (!gpio_is_valid(phy->gpio_id_reset[i])) {
+			dev_err(dev, "unable to get a valid %s gpio\n",
+				phy->reset_names[i]);
+			return -ENODEV;
+		}
+
+		ret = devm_gpio_request(dev, phy->gpio_id_reset[i],
+					phy->reset_names[i]);
+		if (ret)
+			return ret;
+	}
+
+	for (i = 0; i < phy->n_gpio_clkreq; i++) {
+		if (!gpio_is_valid(phy->gpio_id_clkreq[i])) {
+			dev_err(dev, "unable to get a valid %s gpio\n",
+				phy->clkreq_names[i]);
+			return -ENODEV;
+		}
+
+		ret = devm_gpio_request(dev, phy->gpio_id_clkreq[i],
+					phy->clkreq_names[i]);
+		if (ret)
+			return ret;
+	}
+
+	return ret;
+}
+
+static void hi3670_pcie_natural_cfg(struct hi3670_pcie_phy *phy)
+{
+	u32 val;
+
+	/* change 2p mem_ctrl */
+	regmap_write(phy->apb, SOC_PCIECTRL_CTRL20_ADDR, 0x02605550);
+
+	/* pull up sys_aux_pwr_det */
+	regmap_read(phy->apb, SOC_PCIECTRL_CTRL7_ADDR, &val);
+	val |= (0x1 << 10);
+	regmap_write(phy->apb, SOC_PCIECTRL_CTRL7_ADDR, val);
+
+	/* output, pull down */
+	regmap_read(phy->apb, SOC_PCIECTRL_CTRL12_ADDR, &val);
+	val &= ~(0x3 << 2);
+	val |= (0x1 << 1);
+	val &= ~(0x1 << 0);
+	regmap_write(phy->apb, SOC_PCIECTRL_CTRL12_ADDR, val);
+
+	/* Handle phy_reset and lane0_reset to HW */
+	val = hi3670_apb_phy_readl(phy, SOC_PCIEPHY_CTRL1_ADDR);
+	val |= PCIEPHY_RESET_BIT;
+	val &= ~PCIEPHY_PIPE_LINE0_RESET_BIT;
+	hi3670_apb_phy_writel(phy, val, SOC_PCIEPHY_CTRL1_ADDR);
+
+	/* fix chip bug: TxDetectRx fail */
+	val = hi3670_apb_phy_readl(phy, SOC_PCIEPHY_CTRL38_ADDR);
+	val |= (0x1 << 2);
+	hi3670_apb_phy_writel(phy, val, SOC_PCIEPHY_CTRL38_ADDR);
+}
+
+static void hi3670_pcie_pll_init(struct hi3670_pcie_phy *phy)
+{
+	u32 val;
+
+	/* choose FNPLL */
+	val = hi3670_apb_phy_readl(phy, SOC_PCIEPHY_MMC1PLL_CTRL1);
+	val |= (0x1 << 27);
+	hi3670_apb_phy_writel(phy, val, SOC_PCIEPHY_MMC1PLL_CTRL1);
+
+	val = hi3670_apb_phy_readl(phy, SOC_PCIEPHY_MMC1PLL_CTRL16);
+	val &= 0xF000FFFF;
+	/* fnpll fbdiv = 0xD0 */
+	val |= (0xd0 << 16);
+	hi3670_apb_phy_writel(phy, val, SOC_PCIEPHY_MMC1PLL_CTRL16);
+
+	val = hi3670_apb_phy_readl(phy, SOC_PCIEPHY_MMC1PLL_CTRL17);
+	val &= 0xFF000000;
+	/* fnpll fracdiv = 0x555555 */
+	val |= (0x555555 << 0);
+	hi3670_apb_phy_writel(phy, val, SOC_PCIEPHY_MMC1PLL_CTRL17);
+
+	val = hi3670_apb_phy_readl(phy, SOC_PCIEPHY_MMC1PLL_CTRL20);
+	val &= 0xF5FF88FF;
+	/* fnpll dll_en = 0x1 */
+	val |= (0x1 << 27);
+	/* fnpll postdiv1 = 0x5 */
+	val |= (0x5 << 8);
+	/* fnpll postdiv2 = 0x4 */
+	val |= (0x4 << 12);
+	/* fnpll pll_mode = 0x0 */
+	val &= ~(0x1 << 25);
+	hi3670_apb_phy_writel(phy, val, SOC_PCIEPHY_MMC1PLL_CTRL20);
+
+	hi3670_apb_phy_writel(phy, 0x20, SOC_PCIEPHY_MMC1PLL_CTRL21);
+}
+
+static int hi3670_pcie_pll_ctrl(struct hi3670_pcie_phy *phy, bool enable)
+{
+	struct device *dev = phy->dev;
+	u32 val;
+	int time = 200;
+
+	if (enable) {
+		/* pd = 0 */
+		val = hi3670_apb_phy_readl(phy, SOC_PCIEPHY_MMC1PLL_CTRL16);
+		val &= ~(0x1 << 0);
+		hi3670_apb_phy_writel(phy, val, SOC_PCIEPHY_MMC1PLL_CTRL16);
+
+		val = hi3670_apb_phy_readl(phy, SOC_PCIEPHY_MMC1PLL_STAT0);
+
+		/* choose FNPLL */
+		while (!(val & 0x10)) {
+			if (!time) {
+				dev_err(dev, "wait for pll_lock timeout\n");
+				return -1;
+			}
+			time --;
+			udelay(1);
+			val = hi3670_apb_phy_readl(phy, SOC_PCIEPHY_MMC1PLL_STAT0);
+		}
+
+		/* pciepll_bp = 0 */
+		val = hi3670_apb_phy_readl(phy, SOC_PCIEPHY_MMC1PLL_CTRL20);
+		val &= ~(0x1 << 16);
+		hi3670_apb_phy_writel(phy, val, SOC_PCIEPHY_MMC1PLL_CTRL20);
+
+	} else {
+		/* pd = 1 */
+		val = hi3670_apb_phy_readl(phy, SOC_PCIEPHY_MMC1PLL_CTRL16);
+		val |= (0x1 << 0);
+		hi3670_apb_phy_writel(phy, val, SOC_PCIEPHY_MMC1PLL_CTRL16);
+
+		/* pciepll_bp = 1 */
+		val = hi3670_apb_phy_readl(phy, SOC_PCIEPHY_MMC1PLL_CTRL20);
+		val |= (0x1 << 16);
+		hi3670_apb_phy_writel(phy, val, SOC_PCIEPHY_MMC1PLL_CTRL20);
+	}
+
+	 return 0;
+}
+
+static void hi3670_pcie_hp_debounce_gt(struct hi3670_pcie_phy *phy, bool open)
+{
+	if (open)
+		/* gt_clk_pcie_hp/gt_clk_pcie_debounce open */
+		regmap_write(phy->crgctrl, CRGPERIPH_PEREN12, 0x9000);
+	else
+		/* gt_clk_pcie_hp/gt_clk_pcie_debounce close */
+		regmap_write(phy->crgctrl, CRGPERIPH_PERDIS12, 0x9000);
+}
+
+static void hi3670_pcie_phyref_gt(struct hi3670_pcie_phy *phy, bool open)
+{
+	unsigned int val;
+
+	regmap_read(phy->crgctrl, CRGPERIPH_PCIECTRL0, &val);
+
+	if (open)
+		val &= ~(0x1 << 1); //enable hard gt mode
+	else
+		val |= (0x1 << 1); //disable hard gt mode
+
+	regmap_write(phy->crgctrl, CRGPERIPH_PCIECTRL0, val);
+
+	/* disable soft gt mode */
+	regmap_write(phy->crgctrl, CRGPERIPH_PERDIS12, 0x4000);
+}
+
+static void hi3670_pcie_oe_ctrl(struct hi3670_pcie_phy *phy, bool en_flag)
+{
+	unsigned int val;
+
+	regmap_read(phy->crgctrl , CRGPERIPH_PCIECTRL0, &val);
+
+	/* set ie cfg */
+	val |= IO_IE_EN_HARD_BYPASS;
+
+	/* set oe cfg */
+	val &= ~IO_HARD_CTRL_DEBOUNCE_BYPASS;
+
+	/* set phy_debounce in&out time */
+	val |= (DEBOUNCE_WAITCFG_IN | DEBOUNCE_WAITCFG_OUT);
+
+	/* select oe_gt_mode */
+	val |= IO_OE_GT_MODE;
+
+	if (en_flag)
+		val &= ~IO_OE_EN_HARD_BYPASS;
+	else
+		val |= IO_OE_EN_HARD_BYPASS;
+
+	regmap_write(phy->crgctrl, CRGPERIPH_PCIECTRL0, val);
+}
+
+static void hi3670_pcie_ioref_gt(struct hi3670_pcie_phy *phy, bool open)
+{
+	unsigned int val;
+
+	if (open) {
+		regmap_write(phy->apb, SOC_PCIECTRL_CTRL21_ADDR, 0x20000070);
+
+		hi3670_pcie_oe_ctrl(phy, true);
+
+		/* en hard gt mode */
+		regmap_read(phy->crgctrl, CRGPERIPH_PCIECTRL0, &val);
+		val &= ~(0x1 << 0);
+		regmap_write(phy->crgctrl, CRGPERIPH_PCIECTRL0, val);
+
+		/* disable soft gt mode */
+		regmap_write(phy->crgctrl, CRGPERIPH_PERDIS12, 0x2000);
+
+	} else {
+		/* disable hard gt mode */
+		regmap_read(phy->crgctrl, CRGPERIPH_PCIECTRL0, &val);
+		val |= (0x1 << 0);
+		regmap_write(phy->crgctrl, CRGPERIPH_PCIECTRL0, val);
+
+		/* disable soft gt mode */
+		regmap_write(phy->crgctrl, CRGPERIPH_PERDIS12, 0x2000);
+
+		hi3670_pcie_oe_ctrl(phy, false);
+       }
+}
+
+static int hi3670_pcie_allclk_ctrl(struct hi3670_pcie_phy *phy, bool clk_on)
+{
+	struct device *dev = phy->dev;
+	u32 val;
+	int ret = 0;
+
+	if (!clk_on)
+		goto close_clocks;
+
+	/* choose 100MHz clk src: Bit[8]==1 pad, Bit[8]==0 pll */
+	val = hi3670_apb_phy_readl(phy, SOC_PCIEPHY_CTRL1_ADDR);
+	val &= ~(0x1 << 8);
+	hi3670_apb_phy_writel(phy, val, SOC_PCIEPHY_CTRL1_ADDR);
+
+	hi3670_pcie_pll_init(phy);
+
+	ret = hi3670_pcie_pll_ctrl(phy, true);
+	if (ret) {
+		dev_err(dev, "Failed to enable pll\n");
+		return -1;
+	}
+	hi3670_pcie_hp_debounce_gt(phy, true);
+	hi3670_pcie_phyref_gt(phy, true);
+	hi3670_pcie_ioref_gt(phy, true);
+
+	ret = clk_set_rate(phy->aclk, AXI_CLK_FREQ);
+	if (ret) {
+		dev_err(dev, "Failed to set rate\n");
+		goto close_clocks;
+	}
+
+	return 0;
+
+close_clocks:
+	hi3670_pcie_ioref_gt(phy, false);
+	hi3670_pcie_phyref_gt(phy, false);
+	hi3670_pcie_hp_debounce_gt(phy, false);
+
+	hi3670_pcie_pll_ctrl(phy, false);
+
+	return ret;
+}
+
+static bool is_pipe_clk_stable(struct hi3670_pcie_phy *phy)
+{
+	struct device *dev = phy->dev;
+	u32 val;
+	u32 time = 100;
+	u32 pipe_clk_stable = 0x1 << 19;
+
+	val = hi3670_apb_phy_readl(phy, SOC_PCIEPHY_STATE0_ADDR);
+	while (val & pipe_clk_stable) {
+		mdelay(1);
+		if (time == 0) {
+			dev_err(dev, "PIPE clk is not stable\n");
+			return false;
+		}
+		time--;
+		val = hi3670_apb_phy_readl(phy, SOC_PCIEPHY_STATE0_ADDR);
+	}
+
+	return true;
+}
+
+static int hi3670_pcie_noc_power(struct hi3670_pcie_phy *phy, bool enable)
+{
+	struct device *dev = phy->dev;
+	u32 time = 100;
+	unsigned int val = NOC_PW_MASK;
+	int rst;
+
+	if (enable)
+		val = NOC_PW_MASK | NOC_PW_SET_BIT;
+	else
+		val = NOC_PW_MASK;
+	rst = enable ? 1 : 0;
+
+	regmap_write(phy->pmctrl, NOC_POWER_IDLEREQ_1, val);
+
+	time = 100;
+	regmap_read(phy->pmctrl, NOC_POWER_IDLE_1, &val);
+	while((val & NOC_PW_SET_BIT) != rst) {
+		udelay(10);
+		if (!time) {
+			dev_err(dev, "Failed to reverse noc power-status\n");
+			return -1;
+		}
+		time--;
+		regmap_read(phy->pmctrl, NOC_POWER_IDLE_1, &val);
+	}
+
+	return 0;
+}
+
+static int hi3670_pcie_get_apb(struct hi3670_pcie_phy *phy)
+{
+	struct device_node *pcie_port;
+	struct device *dev = phy->dev;
+	struct device *pcie_dev;
+
+	pcie_port = of_get_child_by_name(dev->parent->of_node, "pcie");
+	if (!pcie_port) {
+		dev_err(dev, "no pcie node found in %s\n",
+			dev->parent->of_node->full_name);
+		return -ENODEV;
+	}
+
+	pcie_dev = bus_find_device_by_of_node(&platform_bus_type, pcie_port);
+	if (!pcie_dev) {
+                dev_err(dev, "Didn't find pcie device\n");
+                return -ENODEV;
+        }
+
+        /*
+	 * We might just use NULL instead of the APB name, as the
+	 * pcie-kirin currently registers directly just one regmap (although
+	 * the DWC driver register other regmaps).
+	 *
+	 * Yet, it sounds safer to warrant that it will be accessing the
+	 * right regmap. So, let's use the named version.
+	 */
+	phy->apb = dev_get_regmap(pcie_dev, "kirin_pcie_apb");
+	if (!phy->apb) {
+		dev_err(dev, "Failed to get APB regmap\n");
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+
+static int kirin_pcie_clk_ctrl(struct hi3670_pcie_phy *phy, bool enable)
+{
+	int ret = 0;
+
+	if (!enable)
+		goto close_clk;
+
+	ret = clk_set_rate(phy->phy_ref_clk, REF_CLK_FREQ);
+	if (ret)
+		return ret;
+
+	ret = clk_prepare_enable(phy->phy_ref_clk);
+	if (ret)
+		return ret;
+
+	ret = clk_prepare_enable(phy->apb_sys_clk);
+	if (ret)
+		goto apb_sys_fail;
+
+	ret = clk_prepare_enable(phy->apb_phy_clk);
+	if (ret)
+		goto apb_phy_fail;
+
+	ret = clk_prepare_enable(phy->aclk);
+	if (ret)
+		goto aclk_fail;
+
+	ret = clk_prepare_enable(phy->aux_clk);
+	if (ret)
+		goto aux_clk_fail;
+
+	return 0;
+
+close_clk:
+	clk_disable_unprepare(phy->aux_clk);
+aux_clk_fail:
+	clk_disable_unprepare(phy->aclk);
+aclk_fail:
+	clk_disable_unprepare(phy->apb_phy_clk);
+apb_phy_fail:
+	clk_disable_unprepare(phy->apb_sys_clk);
+apb_sys_fail:
+	clk_disable_unprepare(phy->phy_ref_clk);
+
+	return ret;
+}
+
+static int hi3670_pcie_phy_init(struct phy *generic_phy)
+{
+	struct hi3670_pcie_phy *phy = phy_get_drvdata(generic_phy);
+	struct device *dev = phy->dev;
+	int ret;
+
+	/*
+	 * The code under hi3670_pcie_get_apb() need to access the
+	 * DWC APB registers. So, get them from
+	 * the pcie driver's regmap (see pcie-kirin regmap).
+	 *
+	 * Such kind of resource can only be obtained during the PCIe
+	 * power_on sequence, as the code inside pcie-kirin needs to
+	 * be already probed, as it needs to register the APB regmap.
+	 */
+
+	ret = hi3670_pcie_get_apb(phy);
+	if (ret)
+		return ret;
+
+	/* phy regulator needs to be powered on before calling it */
+	return hi3670_pcie_gpio_request(phy, dev);
+}
+
+static int hi3670_pcie_phy_power_on(struct phy *generic_phy)
+{
+	struct hi3670_pcie_phy *phy = phy_get_drvdata(generic_phy);
+	int val, ret, i;
+
+	/* Power supply for Host */
+	regmap_write(phy->sysctrl,
+		     SCTRL_PCIE_CMOS_OFFSET, SCTRL_PCIE_CMOS_BIT);
+	usleep_range(TIME_CMOS_MIN, TIME_CMOS_MAX);
+
+	hi3670_pcie_phy_oe_enable(phy);
+
+	for (i = 0; i < phy->n_gpio_clkreq; i++) {
+		ret = gpio_direction_output(phy->gpio_id_clkreq[i], 0);
+		if (ret)
+			return ret;
+	}
+
+	ret = kirin_pcie_clk_ctrl(phy, true);
+	if (ret)
+		return ret;
+
+	/* ISO disable, PCIeCtrl, PHY assert and clk gate clear */
+	regmap_write(phy->sysctrl,
+		     SCTRL_PCIE_ISO_OFFSET, SCTRL_PCIE_ISO_BIT);
+	regmap_write(phy->crgctrl,
+		     CRGCTRL_PCIE_ASSERT_OFFSET, CRGCTRL_PCIE_ASSERT_BIT);
+	regmap_write(phy->sysctrl,
+		     SCTRL_PCIE_HPCLK_OFFSET, SCTRL_PCIE_HPCLK_BIT);
+
+	hi3670_pcie_natural_cfg(phy);
+
+	ret = hi3670_pcie_allclk_ctrl(phy, true);
+	if (ret)
+		goto disable_clks;
+
+	/* pull down phy_test_powerdown signal */
+	val = hi3670_apb_phy_readl(phy, SOC_PCIEPHY_CTRL0_ADDR);
+	val &= ~(0x1 << 22);
+	hi3670_apb_phy_writel(phy, val, SOC_PCIEPHY_CTRL0_ADDR);
+
+	/* deassert controller perst_n */
+	regmap_read(phy->apb, SOC_PCIECTRL_CTRL12_ADDR, &val);
+	val |= (0x1 << 2);
+	regmap_write(phy->apb, SOC_PCIECTRL_CTRL12_ADDR, val);
+	udelay(10);
+
+	/* perst assert Endpoints */
+	usleep_range(21000, 23000);
+	for (i = 0; i < phy->n_gpio_resets; i++) {
+		ret = gpio_direction_output(phy->gpio_id_reset[i], 1);
+		if (ret)
+			return ret;
+	}
+	usleep_range(10000, 11000);
+
+	ret = is_pipe_clk_stable(phy);
+	if (!ret)
+		goto disable_clks;
+
+	hi3670_pcie_set_eyeparam(phy);
+
+	ret = hi3670_pcie_noc_power(phy, false);
+	if (ret)
+		goto disable_clks;
+
+	return 0;
+
+disable_clks:
+	kirin_pcie_clk_ctrl(phy, false);
+	return ret;
+}
+
+static int hi3670_pcie_phy_power_off(struct phy *generic_phy)
+{
+	struct hi3670_pcie_phy *phy = phy_get_drvdata(generic_phy);
+
+	/* Drop power supply for Host */
+	regmap_write(phy->sysctrl, SCTRL_PCIE_CMOS_OFFSET, 0x00);
+
+	kirin_pcie_clk_ctrl(phy, false);
+
+	return 0;
+}
+
+static const struct phy_ops hi3670_phy_ops = {
+	.init		= hi3670_pcie_phy_init,
+	.power_on	= hi3670_pcie_phy_power_on,
+	.power_off	= hi3670_pcie_phy_power_off,
+	.owner		= THIS_MODULE,
+};
+
+static int hi3670_pcie_phy_get_resources(struct hi3670_pcie_phy *phy,
+					 struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	char name[32];
+	int i;
+
+	/* syscon */
+	phy->crgctrl = syscon_regmap_lookup_by_compatible("hisilicon,hi3670-crgctrl");
+	if (IS_ERR(phy->crgctrl))
+		return PTR_ERR(phy->crgctrl);
+
+	phy->sysctrl = syscon_regmap_lookup_by_compatible("hisilicon,hi3670-sctrl");
+	if (IS_ERR(phy->sysctrl))
+		return PTR_ERR(phy->sysctrl);
+
+	phy->pmctrl = syscon_regmap_lookup_by_compatible("hisilicon,hi3670-pmctrl");
+	if (IS_ERR(phy->sysctrl))
+		return PTR_ERR(phy->sysctrl);
+
+	/* clocks */
+	phy->phy_ref_clk = devm_clk_get(dev, "phy_ref");
+	if (IS_ERR(phy->phy_ref_clk))
+		return PTR_ERR(phy->phy_ref_clk);
+
+	phy->aux_clk = devm_clk_get(dev, "aux");
+	if (IS_ERR(phy->aux_clk))
+		return PTR_ERR(phy->aux_clk);
+
+	phy->apb_phy_clk = devm_clk_get(dev, "apb_phy");
+	if (IS_ERR(phy->apb_phy_clk))
+		return PTR_ERR(phy->apb_phy_clk);
+
+	phy->apb_sys_clk = devm_clk_get(dev, "apb_sys");
+	if (IS_ERR(phy->apb_sys_clk))
+		return PTR_ERR(phy->apb_sys_clk);
+
+	phy->aclk = devm_clk_get(dev, "aclk");
+	if (IS_ERR(phy->aclk))
+		return PTR_ERR(phy->aclk);
+
+	/* registers */
+	phy->base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(phy->base))
+		return PTR_ERR(phy->base);
+
+	/* perst reset gpios */
+	phy->n_gpio_resets = of_gpio_named_count(np, "reset-gpios");
+	if (phy->n_gpio_resets > MAX_GPIO_RESETS) {
+		dev_err(dev, "Too many GPIO resets!\n");
+		return -EINVAL;
+	}
+	for (i = 0; i < phy->n_gpio_resets; i++) {
+		phy->gpio_id_reset[i] = of_get_named_gpio(dev->of_node,
+							  "reset-gpios", i);
+		if (phy->gpio_id_reset[i] < 0)
+			return phy->gpio_id_reset[i];
+
+		sprintf(name, "pcie_perst_%d", i);
+
+		phy->reset_names[i] = devm_kstrdup_const(dev, name,
+							 GFP_KERNEL);
+		if (!phy->reset_names[i])
+			return -ENOMEM;
+	}
+
+	/* clock request gpios */
+	phy->n_gpio_clkreq = of_gpio_named_count(np, "clkreq-gpios");
+	if (phy->n_gpio_clkreq > MAX_GPIO_CLKREQ) {
+		dev_err(dev, "Too many GPIO clock requests!\n");
+		return -EINVAL;
+	}
+	for (i = 0; i < phy->n_gpio_clkreq; i++) {
+		phy->gpio_id_clkreq[i] = of_get_named_gpio(dev->of_node,
+							   "clkreq-gpios", i);
+		if (phy->gpio_id_clkreq[i] < 0)
+			return phy->gpio_id_clkreq[i];
+
+		sprintf(name, "pcie_clkreq_%d", i);
+		phy->clkreq_names[i] = devm_kstrdup_const(dev, name,
+							  GFP_KERNEL);
+		if (!phy->clkreq_names[i])
+			return -ENOMEM;
+	}
+
+	hi3670_pcie_get_eyeparam(phy);
+
+	return 0;
+}
+
+static int hi3670_pcie_phy_probe(struct platform_device *pdev)
+{
+	struct phy_provider *phy_provider;
+	struct device *dev = &pdev->dev;
+	struct hi3670_pcie_phy *phy;
+	struct phy *generic_phy;
+	int ret;
+
+	phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL);
+	if (!phy)
+		return -ENOMEM;
+
+	phy->dev = dev;
+
+	ret = hi3670_pcie_phy_get_resources(phy, pdev);
+	if (ret)
+		return ret;
+
+	generic_phy = devm_phy_create(dev, dev->of_node, &hi3670_phy_ops);
+	if (IS_ERR(generic_phy)) {
+		dev_err(dev, "failed to create PHY\n");
+		return PTR_ERR(generic_phy);
+	}
+
+	phy_set_drvdata(generic_phy, phy);
+	phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
+
+	return PTR_ERR_OR_ZERO(phy_provider);
+}
+
+static const struct of_device_id hi3670_pcie_phy_match[] = {
+	{
+		.compatible = "hisilicon,hi970-pcie-phy",
+	},
+	{},
+};
+
+static struct platform_driver hi3670_pcie_phy_driver = {
+	.probe	= hi3670_pcie_phy_probe,
+	.driver = {
+		.of_match_table	= hi3670_pcie_phy_match,
+		.name		= "hi3670_pcie_phy",
+		.suppress_bind_attrs = true,
+	}
+};
+builtin_platform_driver(hi3670_pcie_phy_driver);
-- 
2.31.1


^ permalink raw reply	[flat|nested] 12+ messages in thread

* [PATCH v6 7/9] arm64: dts: HiSilicon: Add support for HiKey 970 PCIe controller hardware
  2021-07-20  8:09 [PATCH v6 0/9] Add support for Hikey 970 PCIe Mauro Carvalho Chehab
                   ` (5 preceding siblings ...)
  2021-07-20  8:09 ` [PATCH v6 6/9] phy: HiSilicon: Add driver for Kirin " Mauro Carvalho Chehab
@ 2021-07-20  8:09 ` Mauro Carvalho Chehab
  2021-07-20  8:09 ` [PATCH v6 8/9] dt-bindings: PCI: kirin-pcie.txt: Convert it to yaml Mauro Carvalho Chehab
  2021-07-20  8:09 ` [PATCH v6 9/9] phy-hi3670-pcie: move reset-gpios to the PCIe DT schema Mauro Carvalho Chehab
  8 siblings, 0 replies; 12+ messages in thread
From: Mauro Carvalho Chehab @ 2021-07-20  8:09 UTC (permalink / raw)
  To: Bjorn Helgaas, Rob Herring
  Cc: linuxarm, mauro.chehab, Manivannan Sadhasivam,
	Krzysztof Wilczyński, Binghui Wang, Bjorn Helgaas,
	Lorenzo Pieralisi, Rob Herring, Wei Xu, Xiaowei Song, devicetree,
	linux-arm-kernel, linux-kernel, linux-pci, Mauro Carvalho Chehab

From: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>

Add DTS bindings for the HiKey 970 board's PCIe hardware.

Co-developed-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 arch/arm64/boot/dts/hisilicon/hi3670.dtsi     | 71 +++++++++++++++++++
 .../boot/dts/hisilicon/hikey970-pmic.dtsi     |  1 -
 drivers/pci/controller/dwc/pcie-kirin.c       | 12 ----
 3 files changed, 71 insertions(+), 13 deletions(-)

diff --git a/arch/arm64/boot/dts/hisilicon/hi3670.dtsi b/arch/arm64/boot/dts/hisilicon/hi3670.dtsi
index 1f228612192c..6dfcfcfeedae 100644
--- a/arch/arm64/boot/dts/hisilicon/hi3670.dtsi
+++ b/arch/arm64/boot/dts/hisilicon/hi3670.dtsi
@@ -177,6 +177,12 @@ sctrl: sctrl@fff0a000 {
 			#clock-cells = <1>;
 		};
 
+		pmctrl: pmctrl@fff31000 {
+			compatible = "hisilicon,hi3670-pmctrl", "syscon";
+			reg = <0x0 0xfff31000 0x0 0x1000>;
+			#clock-cells = <1>;
+		};
+
 		iomcu: iomcu@ffd7e000 {
 			compatible = "hisilicon,hi3670-iomcu", "syscon";
 			reg = <0x0 0xffd7e000 0x0 0x1000>;
@@ -660,6 +666,71 @@ gpio28: gpio@fff1d000 {
 			clock-names = "apb_pclk";
 		};
 
+		its_pcie: interrupt-controller@f4000000 {
+			compatible = "arm,gic-v3-its";
+			msi-controller;
+			reg = <0x0 0xf5100000 0x0 0x100000>;
+		};
+
+		pcie_phy: pcie-phy@fc000000 {
+			compatible = "hisilicon,hi970-pcie-phy";
+			reg = <0x0 0xfc000000 0x0 0x80000>;
+
+			phy-supply = <&ldo33>;
+
+			clocks = <&crg_ctrl HI3670_CLK_GATE_PCIEPHY_REF>,
+				 <&crg_ctrl HI3670_CLK_GATE_PCIEAUX>,
+				 <&crg_ctrl HI3670_PCLK_GATE_PCIE_PHY>,
+				 <&crg_ctrl HI3670_PCLK_GATE_PCIE_SYS>,
+				 <&crg_ctrl HI3670_ACLK_GATE_PCIE>;
+			clock-names = "phy_ref", "aux",
+				      "apb_phy", "apb_sys",
+				      "aclk";
+
+			reset-gpios = <&gpio7 0 0 >, <&gpio25 2 0 >,
+				      <&gpio3 1 0 >, <&gpio27 4 0 >;
+
+			clkreq-gpios = <&gpio20 6 0 >, <&gpio27 3 0 >,
+				       <&gpio17 0 0 >;
+
+			/* vboost iboost pre post main */
+			hisilicon,eye-diagram-param = <0xFFFFFFFF 0xFFFFFFFF
+						       0xFFFFFFFF 0xFFFFFFFF
+						       0xFFFFFFFF>;
+
+			#phy-cells = <0>;
+		};
+
+		pcie@f4000000 {
+			compatible = "hisilicon,kirin970-pcie";
+			reg = <0x0 0xf4000000 0x0 0x1000000>,
+			      <0x0 0xfc180000 0x0 0x1000>,
+			      <0x0 0xf5000000 0x0 0x2000>;
+			reg-names = "dbi", "apb", "config";
+			bus-range = <0x0  0x1>;
+			msi-parent = <&its_pcie>;
+			#address-cells = <3>;
+			#size-cells = <2>;
+			device_type = "pci";
+			phys = <&pcie_phy>;
+			ranges = <0x02000000 0x0 0x00000000
+				  0x0 0xf6000000
+				  0x0 0x02000000>;
+			num-lanes = <1>;
+			#interrupt-cells = <1>;
+			interrupts = <0 283 4>;
+			interrupt-names = "msi";
+			interrupt-map-mask = <0 0 0 7>;
+			interrupt-map = <0x0 0 0 1
+					 &gic GIC_SPI 282 IRQ_TYPE_LEVEL_HIGH>,
+					<0x0 0 0 2
+					 &gic GIC_SPI 283 IRQ_TYPE_LEVEL_HIGH>,
+					<0x0 0 0 3
+					 &gic GIC_SPI 284 IRQ_TYPE_LEVEL_HIGH>,
+					<0x0 0 0 4
+					 &gic GIC_SPI 285 IRQ_TYPE_LEVEL_HIGH>;
+		};
+
 		/* UFS */
 		ufs: ufs@ff3c0000 {
 			compatible = "hisilicon,hi3670-ufs", "jedec,ufs-2.1";
diff --git a/arch/arm64/boot/dts/hisilicon/hikey970-pmic.dtsi b/arch/arm64/boot/dts/hisilicon/hikey970-pmic.dtsi
index 48c739eacba0..03452e627641 100644
--- a/arch/arm64/boot/dts/hisilicon/hikey970-pmic.dtsi
+++ b/arch/arm64/boot/dts/hisilicon/hikey970-pmic.dtsi
@@ -73,7 +73,6 @@ ldo33: LDO33 { /* PEX8606 */
 					regulator-name = "ldo33";
 					regulator-min-microvolt = <2500000>;
 					regulator-max-microvolt = <3300000>;
-					regulator-boot-on;
 				};
 
 				ldo34: LDO34 { /* GPS AUX IN VDD */
diff --git a/drivers/pci/controller/dwc/pcie-kirin.c b/drivers/pci/controller/dwc/pcie-kirin.c
index 7a92f633d746..4657a6d33f6f 100644
--- a/drivers/pci/controller/dwc/pcie-kirin.c
+++ b/drivers/pci/controller/dwc/pcie-kirin.c
@@ -347,18 +347,6 @@ static const struct regmap_config pcie_kirin_regmap_conf = {
 	.reg_stride = 4,
 };
 
-/* Registers in PCIeCTRL */
-static inline void kirin_apb_ctrl_writel(struct kirin_pcie *kirin_pcie,
-					 u32 val, u32 reg)
-{
-	writel(val, kirin_pcie->apb_base + reg);
-}
-
-static inline u32 kirin_apb_ctrl_readl(struct kirin_pcie *kirin_pcie, u32 reg)
-{
-	return readl(kirin_pcie->apb_base + reg);
-}
-
 static long kirin_pcie_get_resource(struct kirin_pcie *kirin_pcie,
 				    struct platform_device *pdev)
 {
-- 
2.31.1


^ permalink raw reply	[flat|nested] 12+ messages in thread

* [PATCH v6 8/9] dt-bindings: PCI: kirin-pcie.txt: Convert it to yaml
  2021-07-20  8:09 [PATCH v6 0/9] Add support for Hikey 970 PCIe Mauro Carvalho Chehab
                   ` (6 preceding siblings ...)
  2021-07-20  8:09 ` [PATCH v6 7/9] arm64: dts: HiSilicon: Add support for HiKey 970 PCIe controller hardware Mauro Carvalho Chehab
@ 2021-07-20  8:09 ` Mauro Carvalho Chehab
  2021-07-20  8:09 ` [PATCH v6 9/9] phy-hi3670-pcie: move reset-gpios to the PCIe DT schema Mauro Carvalho Chehab
  8 siblings, 0 replies; 12+ messages in thread
From: Mauro Carvalho Chehab @ 2021-07-20  8:09 UTC (permalink / raw)
  To: Bjorn Helgaas, Rob Herring
  Cc: linuxarm, mauro.chehab, Mauro Carvalho Chehab, Binghui Wang,
	Bjorn Helgaas, Gustavo Pimentel, Jingoo Han, Rob Herring,
	Xiaowei Song, devicetree, linux-kernel, linux-pci

Convert the file into a JSON description at the yaml format.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 .../bindings/pci/hisilicon,kirin-pcie.yaml    | 87 +++++++++++++++++++
 .../devicetree/bindings/pci/kirin-pcie.txt    | 50 -----------
 .../devicetree/bindings/pci/snps,dw-pcie.yaml |  2 +-
 MAINTAINERS                                   |  2 +-
 4 files changed, 89 insertions(+), 52 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/pci/hisilicon,kirin-pcie.yaml
 delete mode 100644 Documentation/devicetree/bindings/pci/kirin-pcie.txt

diff --git a/Documentation/devicetree/bindings/pci/hisilicon,kirin-pcie.yaml b/Documentation/devicetree/bindings/pci/hisilicon,kirin-pcie.yaml
new file mode 100644
index 000000000000..eabc651c9766
--- /dev/null
+++ b/Documentation/devicetree/bindings/pci/hisilicon,kirin-pcie.yaml
@@ -0,0 +1,87 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pci/hisilicon,kirin-pcie.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: HiSilicon Kirin SoCs PCIe host DT description
+
+maintainers:
+  - Xiaowei Song <songxiaowei@hisilicon.com>
+  - Binghui Wang <wangbinghui@hisilicon.com>
+
+description: |
+  Kirin PCIe host controller is based on the Synopsys DesignWare PCI core.
+  It shares common functions with the PCIe DesignWare core driver and
+  inherits common properties defined in
+  Documentation/devicetree/bindings/pci/snps,dw-pcie.yaml.
+
+allOf:
+  - $ref: /schemas/pci/snps,dw-pcie.yaml#
+
+properties:
+  compatible:
+    contains:
+      enum:
+        - hisilicon,kirin960-pcie
+        - hisilicon,kirin970-pcie
+
+  reg:
+    description: |
+      Should contain rc_dbi, apb, config registers location and length.
+    minItems: 3
+    maxItems: 4
+
+  reg-names:
+    items:
+      - const: dbi          # controller configuration registers
+      - const: apb          # apb Ctrl register defined by Kirin
+      - const: config       # PCIe configuration space registers
+      - const: phy          # apb PHY register used on Kirin 960 PHY
+    minItems: 3
+    maxItems: 4
+
+  reset-gpios:
+    description: The GPIO(s) to generate PCIe PERST# assert and deassert signal.
+    minItems: 1
+    maxItems: 4
+
+required:
+  - compatible
+  - reg
+  - reg-names
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    soc {
+      #address-cells = <2>;
+      #size-cells = <2>;
+
+      pcie: pcie@f4000000 {
+        compatible = "hisilicon,kirin970-pcie";
+        reg = <0x0 0xf4000000 0x0 0x1000>,
+              <0x0 0xff3fe000 0x0 0x1000>,
+              <0x0 0xf4000000 0 0x2000>;
+        reg-names = "dbi", "apb", "config";
+        bus-range = <0x0  0x1>;
+        #address-cells = <3>;
+        #size-cells = <2>;
+        device_type = "pci";
+        ranges = <0x02000000 0x0 0x00000000 0x0 0xf5000000 0x0 0x2000000>;
+        num-lanes = <1>;
+        #interrupt-cells = <1>;
+        interrupts = <0 283 4>;
+        interrupt-names = "msi";
+        interrupt-map-mask = <0xf800 0 0 7>;
+        interrupt-map = <0x0 0 0 1 &gic GIC_SPI 282 IRQ_TYPE_LEVEL_HIGH>,
+                        <0x0 0 0 2 &gic GIC_SPI 283 IRQ_TYPE_LEVEL_HIGH>,
+                        <0x0 0 0 3 &gic GIC_SPI 284 IRQ_TYPE_LEVEL_HIGH>,
+                        <0x0 0 0 4 &gic GIC_SPI 285 IRQ_TYPE_LEVEL_HIGH>;
+        reset-gpios = <&gpio7 0 0 >, <&gpio25 2 0 >,
+                      <&gpio3 1 0 >, <&gpio27 4 0 >;
+      };
+    };
diff --git a/Documentation/devicetree/bindings/pci/kirin-pcie.txt b/Documentation/devicetree/bindings/pci/kirin-pcie.txt
deleted file mode 100644
index 7adab8999a6a..000000000000
--- a/Documentation/devicetree/bindings/pci/kirin-pcie.txt
+++ /dev/null
@@ -1,50 +0,0 @@
-HiSilicon Kirin SoCs PCIe host DT description
-
-Kirin PCIe host controller is based on the Synopsys DesignWare PCI core.
-It shares common functions with the PCIe DesignWare core driver and
-inherits common properties defined in
-Documentation/devicetree/bindings/pci/snps,dw-pcie.yaml.
-
-Additional properties are described here:
-
-Required properties
-- compatible:
-	"hisilicon,kirin960-pcie"
-- reg: Should contain rc_dbi, apb, phy, config registers location and length.
-- reg-names: Must include the following entries:
-  "dbi": controller configuration registers;
-  "apb": apb Ctrl register defined by Kirin;
-  "phy": apb PHY register defined by Kirin;
-  "config": PCIe configuration space registers.
-- reset-gpios: The GPIO to generate PCIe PERST# assert and deassert signal.
-
-Optional properties:
-
-Example based on kirin960:
-
-	pcie@f4000000 {
-		compatible = "hisilicon,kirin960-pcie";
-		reg = <0x0 0xf4000000 0x0 0x1000>, <0x0 0xff3fe000 0x0 0x1000>,
-		      <0x0 0xf3f20000 0x0 0x40000>, <0x0 0xF4000000 0 0x2000>;
-		reg-names = "dbi","apb","phy", "config";
-		bus-range = <0x0  0x1>;
-		#address-cells = <3>;
-		#size-cells = <2>;
-		device_type = "pci";
-		ranges = <0x02000000 0x0 0x00000000 0x0 0xf5000000 0x0 0x2000000>;
-		num-lanes = <1>;
-		#interrupt-cells = <1>;
-		interrupt-map-mask = <0xf800 0 0 7>;
-		interrupt-map = <0x0 0 0 1 &gic 0 0 0  282 4>,
-				<0x0 0 0 2 &gic 0 0 0  283 4>,
-				<0x0 0 0 3 &gic 0 0 0  284 4>,
-				<0x0 0 0 4 &gic 0 0 0  285 4>;
-		clocks = <&crg_ctrl HI3660_PCIEPHY_REF>,
-			 <&crg_ctrl HI3660_CLK_GATE_PCIEAUX>,
-			 <&crg_ctrl HI3660_PCLK_GATE_PCIE_PHY>,
-			 <&crg_ctrl HI3660_PCLK_GATE_PCIE_SYS>,
-			 <&crg_ctrl HI3660_ACLK_GATE_PCIE>;
-		clock-names = "pcie_phy_ref", "pcie_aux",
-			      "pcie_apb_phy", "pcie_apb_sys", "pcie_aclk";
-		reset-gpios = <&gpio11 1 0 >;
-	};
diff --git a/Documentation/devicetree/bindings/pci/snps,dw-pcie.yaml b/Documentation/devicetree/bindings/pci/snps,dw-pcie.yaml
index a8c1db879fb9..d80894a5abf5 100644
--- a/Documentation/devicetree/bindings/pci/snps,dw-pcie.yaml
+++ b/Documentation/devicetree/bindings/pci/snps,dw-pcie.yaml
@@ -34,7 +34,7 @@ properties:
     minItems: 2
     maxItems: 5
     items:
-      enum: [dbi, dbi2, config, atu, app, elbi, mgmt, ctrl, parf, cfg, link]
+      enum: [dbi, dbi2, config, atu, apb, app, elbi, mgmt, ctrl, parf, cfg, link]
 
   num-lanes:
     description: |
diff --git a/MAINTAINERS b/MAINTAINERS
index b54bd9dd07ec..d5f53b2d3f9c 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -14420,7 +14420,7 @@ M:	Xiaowei Song <songxiaowei@hisilicon.com>
 M:	Binghui Wang <wangbinghui@hisilicon.com>
 L:	linux-pci@vger.kernel.org
 S:	Maintained
-F:	Documentation/devicetree/bindings/pci/kirin-pcie.txt
+F:	Documentation/devicetree/bindings/pci/hisilicon,kirin-pcie.yaml
 F:	drivers/pci/controller/dwc/pcie-kirin.c
 
 PCIE DRIVER FOR HISILICON STB
-- 
2.31.1


^ permalink raw reply	[flat|nested] 12+ messages in thread

* [PATCH v6 9/9] phy-hi3670-pcie: move reset-gpios to the PCIe DT schema
  2021-07-20  8:09 [PATCH v6 0/9] Add support for Hikey 970 PCIe Mauro Carvalho Chehab
                   ` (7 preceding siblings ...)
  2021-07-20  8:09 ` [PATCH v6 8/9] dt-bindings: PCI: kirin-pcie.txt: Convert it to yaml Mauro Carvalho Chehab
@ 2021-07-20  8:09 ` Mauro Carvalho Chehab
  8 siblings, 0 replies; 12+ messages in thread
From: Mauro Carvalho Chehab @ 2021-07-20  8:09 UTC (permalink / raw)
  To: Bjorn Helgaas, Rob Herring
  Cc: linuxarm, mauro.chehab, Mauro Carvalho Chehab,
	Kishon Vijay Abraham I, Manivannan Sadhasivam, Rob Herring,
	Vinod Koul, Wei Xu, devicetree, linux-arm-kernel, linux-kernel,
	linux-phy

The PHY interface as found on HiKey 970 uses 4 reset-gpios
instead of just one. That seems to be due to electrical
requirements, as, on HiKey 970, the PERST# signal is
provided via one GPIO per connected/available PCIe device:

- GPIO 56 has a pullup logic from 1V8 to 2V5
  connected to a PCIe bridge chip (PEX 8606);
- GPIO 25 has a pullup logic from 1V8 to 3V3
  connected to the PERST# pin at the M.2 slot;
- GPIO 220 has a pullup logic from 1V8 to 3V3
  connected to the PERST# pin at the PCIe mini slot;
- GPIO 203 has a pullup logic from 1V8 to 3V3
  connected to the PERST# pin at the Ethernet chipset.

Originally, this was mapped via the PHY interface, but, as such
design may also be used with different hardware, remap this
to use the pcie-bus DT schema.

This patch depends on a DT schema patch submitted at:
	https://github.com/devicetree-org/dt-schema/pull/56

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 .../phy/hisilicon,phy-hi3670-pcie.yaml        |  4 --
 arch/arm64/boot/dts/hisilicon/hi3670.dtsi     |  5 +-
 drivers/phy/hisilicon/phy-hi3670-pcie.c       | 54 ++++++++++---------
 3 files changed, 31 insertions(+), 32 deletions(-)

diff --git a/Documentation/devicetree/bindings/phy/hisilicon,phy-hi3670-pcie.yaml b/Documentation/devicetree/bindings/phy/hisilicon,phy-hi3670-pcie.yaml
index f88b6b7496bb..112a982ee258 100644
--- a/Documentation/devicetree/bindings/phy/hisilicon,phy-hi3670-pcie.yaml
+++ b/Documentation/devicetree/bindings/phy/hisilicon,phy-hi3670-pcie.yaml
@@ -42,10 +42,6 @@ properties:
       - const: apb_sys
       - const: aclk
 
-  reset-gpios:
-    description: PCI PERST reset GPIOs
-    maxItems: 4
-
   clkreq-gpios:
     description: Clock request GPIOs
     maxItems: 3
diff --git a/arch/arm64/boot/dts/hisilicon/hi3670.dtsi b/arch/arm64/boot/dts/hisilicon/hi3670.dtsi
index 6dfcfcfeedae..a07790c76b72 100644
--- a/arch/arm64/boot/dts/hisilicon/hi3670.dtsi
+++ b/arch/arm64/boot/dts/hisilicon/hi3670.dtsi
@@ -687,9 +687,6 @@ pcie_phy: pcie-phy@fc000000 {
 				      "apb_phy", "apb_sys",
 				      "aclk";
 
-			reset-gpios = <&gpio7 0 0 >, <&gpio25 2 0 >,
-				      <&gpio3 1 0 >, <&gpio27 4 0 >;
-
 			clkreq-gpios = <&gpio20 6 0 >, <&gpio27 3 0 >,
 				       <&gpio17 0 0 >;
 
@@ -729,6 +726,8 @@ &gic GIC_SPI 283 IRQ_TYPE_LEVEL_HIGH>,
 					 &gic GIC_SPI 284 IRQ_TYPE_LEVEL_HIGH>,
 					<0x0 0 0 4
 					 &gic GIC_SPI 285 IRQ_TYPE_LEVEL_HIGH>;
+			reset-gpios = <&gpio7 0 0 >, <&gpio25 2 0 >,
+				      <&gpio3 1 0 >, <&gpio27 4 0 >;
 		};
 
 		/* UFS */
diff --git a/drivers/phy/hisilicon/phy-hi3670-pcie.c b/drivers/phy/hisilicon/phy-hi3670-pcie.c
index e80143df0217..77bf5bb07ba2 100644
--- a/drivers/phy/hisilicon/phy-hi3670-pcie.c
+++ b/drivers/phy/hisilicon/phy-hi3670-pcie.c
@@ -553,11 +553,13 @@ static int hi3670_pcie_noc_power(struct hi3670_pcie_phy *phy, bool enable)
 	return 0;
 }
 
-static int hi3670_pcie_get_apb(struct hi3670_pcie_phy *phy)
+static int hi3670_pcie_get_resources_from_pcie(struct hi3670_pcie_phy *phy)
 {
 	struct device_node *pcie_port;
 	struct device *dev = phy->dev;
 	struct device *pcie_dev;
+	char name[32];
+	int i;
 
 	pcie_port = of_get_child_by_name(dev->parent->of_node, "pcie");
 	if (!pcie_port) {
@@ -586,6 +588,27 @@ static int hi3670_pcie_get_apb(struct hi3670_pcie_phy *phy)
 		return -ENODEV;
 	}
 
+	/* perst reset gpios */
+	phy->n_gpio_resets = of_gpio_named_count(pcie_dev->of_node,
+						 "reset-gpios");
+	if (phy->n_gpio_resets > MAX_GPIO_RESETS) {
+		dev_err(dev, "Too many GPIO resets!\n");
+		return -EINVAL;
+	}
+	for (i = 0; i < phy->n_gpio_resets; i++) {
+		phy->gpio_id_reset[i] = of_get_named_gpio(pcie_dev->of_node,
+							  "reset-gpios", i);
+		if (phy->gpio_id_reset[i] < 0)
+			return phy->gpio_id_reset[i];
+
+		sprintf(name, "pcie_perst_%d", i);
+
+		phy->reset_names[i] = devm_kstrdup_const(dev, name,
+							 GFP_KERNEL);
+		if (!phy->reset_names[i])
+			return -ENOMEM;
+	}
+
 	return 0;
 }
 
@@ -644,16 +667,17 @@ static int hi3670_pcie_phy_init(struct phy *generic_phy)
 	int ret;
 
 	/*
-	 * The code under hi3670_pcie_get_apb() need to access the
-	 * DWC APB registers. So, get them from
-	 * the pcie driver's regmap (see pcie-kirin regmap).
+	 * The code under hi3670_pcie_get_resources_from_pcie() need to
+	 * access the reset-gpios and the APB registers, both from the
+	 * pcie-kirin driver.
 	 *
+	 * The APB is obtained via the pcie driver's regmap
 	 * Such kind of resource can only be obtained during the PCIe
 	 * power_on sequence, as the code inside pcie-kirin needs to
 	 * be already probed, as it needs to register the APB regmap.
 	 */
 
-	ret = hi3670_pcie_get_apb(phy);
+	ret = hi3670_pcie_get_resources_from_pcie(phy);
 	if (ret)
 		return ret;
 
@@ -800,26 +824,6 @@ static int hi3670_pcie_phy_get_resources(struct hi3670_pcie_phy *phy,
 	if (IS_ERR(phy->base))
 		return PTR_ERR(phy->base);
 
-	/* perst reset gpios */
-	phy->n_gpio_resets = of_gpio_named_count(np, "reset-gpios");
-	if (phy->n_gpio_resets > MAX_GPIO_RESETS) {
-		dev_err(dev, "Too many GPIO resets!\n");
-		return -EINVAL;
-	}
-	for (i = 0; i < phy->n_gpio_resets; i++) {
-		phy->gpio_id_reset[i] = of_get_named_gpio(dev->of_node,
-							  "reset-gpios", i);
-		if (phy->gpio_id_reset[i] < 0)
-			return phy->gpio_id_reset[i];
-
-		sprintf(name, "pcie_perst_%d", i);
-
-		phy->reset_names[i] = devm_kstrdup_const(dev, name,
-							 GFP_KERNEL);
-		if (!phy->reset_names[i])
-			return -ENOMEM;
-	}
-
 	/* clock request gpios */
 	phy->n_gpio_clkreq = of_gpio_named_count(np, "clkreq-gpios");
 	if (phy->n_gpio_clkreq > MAX_GPIO_CLKREQ) {
-- 
2.31.1


^ permalink raw reply	[flat|nested] 12+ messages in thread

* Re: [PATCH v6 5/9] dt-bindings: phy: Add bindings for HiKey 970 PCIe PHY
  2021-07-20  8:09 ` [PATCH v6 5/9] dt-bindings: phy: Add bindings for HiKey 970 PCIe PHY Mauro Carvalho Chehab
@ 2021-07-20 13:11   ` Rob Herring
  0 siblings, 0 replies; 12+ messages in thread
From: Rob Herring @ 2021-07-20 13:11 UTC (permalink / raw)
  To: Mauro Carvalho Chehab
  Cc: Kishon Vijay Abraham I, linuxarm, mauro.chehab, Rob Herring,
	Vinod Koul, devicetree, linux-phy, linux-kernel, Bjorn Helgaas

On Tue, 20 Jul 2021 10:09:07 +0200, Mauro Carvalho Chehab wrote:
> Document the bindings for HiKey 970 (hi3670) PCIe PHY
> interface, supported via the pcie-kirin driver.
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> ---
>  .../phy/hisilicon,phy-hi3670-pcie.yaml        | 98 +++++++++++++++++++
>  1 file changed, 98 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/phy/hisilicon,phy-hi3670-pcie.yaml
> 

My bot found errors running 'make DT_CHECKER_FLAGS=-m dt_binding_check'
on your patch (DT_CHECKER_FLAGS is new in v5.13):

yamllint warnings/errors:

dtschema/dtc warnings/errors:
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/hisilicon,phy-hi3670-pcie.example.dt.yaml: pcie-phy@fc000000: 'reg-names' does not match any of the regexes: 'pinctrl-[0-9]+'
	From schema: /builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/hisilicon,phy-hi3670-pcie.yaml
\ndoc reference errors (make refcheckdocs):

See https://patchwork.ozlabs.org/patch/1507427

This check can fail if there are any dependencies. The base for a patch
series is generally the most recent rc1.

If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:

pip3 install dtschema --upgrade

Please check and re-submit.


^ permalink raw reply	[flat|nested] 12+ messages in thread

* Re: [PATCH v6 2/9] PCI: kirin: add support for a PHY layer
  2021-07-20  8:09 ` [PATCH v6 2/9] PCI: kirin: add support for a PHY layer Mauro Carvalho Chehab
@ 2021-07-20 23:26   ` Bjorn Helgaas
  0 siblings, 0 replies; 12+ messages in thread
From: Bjorn Helgaas @ 2021-07-20 23:26 UTC (permalink / raw)
  To: Mauro Carvalho Chehab
  Cc: Rob Herring, linuxarm, mauro.chehab, Krzysztof Wilczyński,
	Binghui Wang, Bjorn Helgaas, Lorenzo Pieralisi, Xiaowei Song,
	linux-kernel, linux-pci

In subject:

  PCI: kirin: Add support for a PHY later

(s/add/Add/)

On Tue, Jul 20, 2021 at 10:09:04AM +0200, Mauro Carvalho Chehab wrote:
> While it is too late to remove the Kirin 960 PHY, the driver
> should be able to support different PHYs used by other devices.

Commit log doesn't actually say what this patch does.

> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> ---
>  drivers/pci/controller/dwc/pcie-kirin.c | 95 +++++++++++++++++++++----
>  1 file changed, 80 insertions(+), 15 deletions(-)
> 
> diff --git a/drivers/pci/controller/dwc/pcie-kirin.c b/drivers/pci/controller/dwc/pcie-kirin.c
> index b4063a3434df..558188476372 100644
> --- a/drivers/pci/controller/dwc/pcie-kirin.c
> +++ b/drivers/pci/controller/dwc/pcie-kirin.c
> @@ -8,16 +8,18 @@
>   * Author: Xiaowei Song <songxiaowei@huawei.com>
>   */
>  
> -#include <linux/compiler.h>
>  #include <linux/clk.h>
> +#include <linux/compiler.h>
>  #include <linux/delay.h>
>  #include <linux/err.h>
>  #include <linux/gpio.h>
>  #include <linux/interrupt.h>
>  #include <linux/mfd/syscon.h>
>  #include <linux/of_address.h>
> +#include <linux/of_device.h>
>  #include <linux/of_gpio.h>
>  #include <linux/of_pci.h>
> +#include <linux/phy/phy.h>
>  #include <linux/pci.h>
>  #include <linux/pci_regs.h>
>  #include <linux/platform_device.h>
> @@ -50,11 +52,18 @@
>  #define PCIE_DEBOUNCE_PARAM	0xF0F400
>  #define PCIE_OE_BYPASS		(0x3 << 28)
>  
> +enum pcie_kirin_phy_type {
> +	PCIE_KIRIN_INTERNAL_PHY,
> +	PCIE_KIRIN_EXTERNAL_PHY
> +};
> +
>  struct kirin_pcie {
> +	enum pcie_kirin_phy_type	type;
> +
>  	struct dw_pcie	*pci;
>  	struct phy	*phy;
>  	void __iomem	*apb_base;
> -	void		*phy_priv;	/* Needed for Kirin 960 PHY */
> +	void		*phy_priv;	/* only for PCIE_KIRIN_INTERNAL_PHY */
>  };
>  
>  /*
> @@ -476,8 +485,63 @@ static const struct dw_pcie_host_ops kirin_pcie_host_ops = {
>  	.host_init = kirin_pcie_host_init,
>  };
>  
> +static const struct of_device_id kirin_pcie_match[] = {
> +	{
> +		.compatible = "hisilicon,kirin960-pcie",
> +		.data = (void *)PCIE_KIRIN_INTERNAL_PHY
> +	},
> +	{},
> +};

Is there a benefit to moving kirin_pcie_match[] up here?  Seemed nice
to have it close to its use in kirin_pcie_driver, and would make the
diff easier to read.  But if it helps to move it, no big deal.

> +static int kirin_pcie_power_on(struct platform_device *pdev,
> +			       struct kirin_pcie *kirin_pcie)
> +{
> +	struct device *dev = &pdev->dev;
> +	int ret;
> +
> +	if (kirin_pcie->type == PCIE_KIRIN_INTERNAL_PHY) {
> +		ret = hi3660_pcie_phy_init(pdev, kirin_pcie);
> +		if (ret)
> +			return ret;
> +
> +		return hi3660_pcie_phy_power_on(kirin_pcie);
> +	}
> +
> +	kirin_pcie->phy = devm_of_phy_get(dev, dev->of_node, NULL);
> +	if (IS_ERR(kirin_pcie->phy))
> +		return PTR_ERR(kirin_pcie->phy);
> +
> +	ret = phy_init(kirin_pcie->phy);
> +	if (ret)
> +		goto err;
> +
> +	ret = phy_power_on(kirin_pcie->phy);
> +	if (ret)
> +		goto err;
> +
> +	return 0;
> +err:
> +	phy_exit(kirin_pcie->phy);
> +	return ret;
> +}
> +
> +static int __exit kirin_pcie_remove(struct platform_device *pdev)
> +{
> +	struct kirin_pcie *kirin_pcie = platform_get_drvdata(pdev);
> +
> +	if (kirin_pcie->type == PCIE_KIRIN_INTERNAL_PHY)
> +		return 0;
> +
> +	phy_power_off(kirin_pcie->phy);
> +	phy_exit(kirin_pcie->phy);
> +
> +	return 0;
> +}
> +
>  static int kirin_pcie_probe(struct platform_device *pdev)
>  {
> +	enum pcie_kirin_phy_type phy_type;
> +	const struct of_device_id *of_id;
>  	struct device *dev = &pdev->dev;
>  	struct kirin_pcie *kirin_pcie;
>  	struct dw_pcie *pci;
> @@ -488,6 +552,14 @@ static int kirin_pcie_probe(struct platform_device *pdev)
>  		return -EINVAL;
>  	}
>  
> +	of_id = of_match_device(kirin_pcie_match, dev);
> +	if (!of_id) {
> +		dev_err(dev, "OF data missing\n");
> +		return -EINVAL;
> +	}
> +
> +	phy_type = (enum pcie_kirin_phy_type)of_id->data;
> +
>  	kirin_pcie = devm_kzalloc(dev, sizeof(struct kirin_pcie), GFP_KERNEL);
>  	if (!kirin_pcie)
>  		return -ENOMEM;
> @@ -500,31 +572,24 @@ static int kirin_pcie_probe(struct platform_device *pdev)
>  	pci->ops = &kirin_dw_pcie_ops;
>  	pci->pp.ops = &kirin_pcie_host_ops;
>  	kirin_pcie->pci = pci;
> -
> -	ret = hi3660_pcie_phy_init(pdev, kirin_pcie);
> -	if (ret)
> -		return ret;
> +	kirin_pcie->type = phy_type;
>  
>  	ret = kirin_pcie_get_resource(kirin_pcie, pdev);
>  	if (ret)
>  		return ret;
>  
> -	ret = hi3660_pcie_phy_power_on(kirin_pcie);
> -	if (ret)
> -		return ret;
> -
>  	platform_set_drvdata(pdev, kirin_pcie);
>  
> +	ret = kirin_pcie_power_on(pdev, kirin_pcie);
> +	if (ret)
> +		return ret;
> +
>  	return dw_pcie_host_init(&pci->pp);
>  }
>  
> -static const struct of_device_id kirin_pcie_match[] = {
> -	{ .compatible = "hisilicon,kirin960-pcie" },
> -	{},
> -};
> -
>  static struct platform_driver kirin_pcie_driver = {
>  	.probe			= kirin_pcie_probe,
> +	.remove	        	= __exit_p(kirin_pcie_remove),
>  	.driver			= {
>  		.name			= "kirin-pcie",
>  		.of_match_table		= kirin_pcie_match,
> -- 
> 2.31.1
> 

^ permalink raw reply	[flat|nested] 12+ messages in thread

end of thread, other threads:[~2021-07-20 23:27 UTC | newest]

Thread overview: 12+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-07-20  8:09 [PATCH v6 0/9] Add support for Hikey 970 PCIe Mauro Carvalho Chehab
2021-07-20  8:09 ` [PATCH v6 1/9] PCI: kirin: Reorganize the PHY logic inside the driver Mauro Carvalho Chehab
2021-07-20  8:09 ` [PATCH v6 2/9] PCI: kirin: add support for a PHY layer Mauro Carvalho Chehab
2021-07-20 23:26   ` Bjorn Helgaas
2021-07-20  8:09 ` [PATCH v6 3/9] PCI: kirin: Use regmap for APB registers Mauro Carvalho Chehab
2021-07-20  8:09 ` [PATCH v6 4/9] dt-bindings: PCI: kirin: Fix compatible string Mauro Carvalho Chehab
2021-07-20  8:09 ` [PATCH v6 5/9] dt-bindings: phy: Add bindings for HiKey 970 PCIe PHY Mauro Carvalho Chehab
2021-07-20 13:11   ` Rob Herring
2021-07-20  8:09 ` [PATCH v6 6/9] phy: HiSilicon: Add driver for Kirin " Mauro Carvalho Chehab
2021-07-20  8:09 ` [PATCH v6 7/9] arm64: dts: HiSilicon: Add support for HiKey 970 PCIe controller hardware Mauro Carvalho Chehab
2021-07-20  8:09 ` [PATCH v6 8/9] dt-bindings: PCI: kirin-pcie.txt: Convert it to yaml Mauro Carvalho Chehab
2021-07-20  8:09 ` [PATCH v6 9/9] phy-hi3670-pcie: move reset-gpios to the PCIe DT schema Mauro Carvalho Chehab

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