[PATCH v3 0/2] Use the generic PHY framework for Ingenic USB PHY.

[PATCH v3 0/2] Use the generic PHY framework for Ingenic USB PHY.

[周琰杰 (Zhou Yanjie)]

v2->v3:
1.Remove unnecessary "of_match_ptr()" before the move to the generic PHY.
2.Change "depends on (MACH_INGENIC && MIPS) || COMPILE_TEST" to
  "depends on MIPS || COMPILE_TEST".
3.Keep the adjustments of "ingenic_usb_phy_init()" and "ingenic_usb_phu_exit()"
  positions in v2 to make them consistent with the order in "ingenic_usb_phy_ops",
  keep the adjustments to the positions of "ingenic_usb_phy_of_matches[]" in v2
  to keep them consistent with the styles of other USB PHY drivers. And remove
  some unnecessary changes to reduce the diff size.

周琰杰 (Zhou Yanjie) (2):
  USB: PHY: JZ4770: Remove unnecessary function calls.
  USB: PHY: JZ4770: Use the generic PHY framework.

 drivers/phy/Kconfig                                |   1 +
 drivers/phy/Makefile                               |   1 +
 drivers/phy/ingenic/Kconfig                        |  12 ++
 drivers/phy/ingenic/Makefile                       |   2 +
 .../phy-jz4770.c => phy/ingenic/phy-ingenic-usb.c} | 211 +++++++++++----------
 drivers/usb/phy/Kconfig                            |   8 -
 drivers/usb/phy/Makefile                           |   1 -
 7 files changed, 129 insertions(+), 107 deletions(-)
 create mode 100644 drivers/phy/ingenic/Kconfig
 create mode 100644 drivers/phy/ingenic/Makefile
 rename drivers/{usb/phy/phy-jz4770.c => phy/ingenic/phy-ingenic-usb.c} (70%)

-- 
2.11.0

[PATCH v3 1/2] USB: PHY: JZ4770: Remove unnecessary function calls.

[周琰杰 (Zhou Yanjie)]

Remove unnecessary "of_match_ptr()", because Ingenic SoCs all
depend on Device Tree.

Suggested-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
---

Notes:
    v3:
    New patch.

 drivers/usb/phy/phy-jz4770.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/phy/phy-jz4770.c b/drivers/usb/phy/phy-jz4770.c
index f6d3731581eb..4025da20b3fd 100644
--- a/drivers/usb/phy/phy-jz4770.c
+++ b/drivers/usb/phy/phy-jz4770.c
@@ -350,7 +350,7 @@ static struct platform_driver ingenic_phy_driver = {
 	.probe		= jz4770_phy_probe,
 	.driver		= {
 		.name	= "jz4770-phy",
-		.of_match_table = of_match_ptr(ingenic_usb_phy_of_matches),
+		.of_match_table = ingenic_usb_phy_of_matches,
 	},
 };
 module_platform_driver(ingenic_phy_driver);
-- 
2.11.0

[PATCH v3 2/2] USB: PHY: JZ4770: Use the generic PHY framework.

[周琰杰 (Zhou Yanjie)]

Used the generic PHY framework API to create the PHY,
and move the driver to driver/phy/ingenic. And adjust
the position of some codes to make it consistent with
the style of other USB PHY drivers.

Tested-by: 周正 (Zhou Zheng) <sernia.zhou@foxmail.com>
Co-developed-by: 漆鹏振 (Qi Pengzhen) <aric.pzqi@ingenic.com>
Signed-off-by: 漆鹏振 (Qi Pengzhen) <aric.pzqi@ingenic.com>
Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
---

Notes:
    v1->v2:
    Fix bug, ".of_match_table = of_match_ptr(ingenic_usb_phy_of_matches)" is wrong
    and should be replaced with ".of_match_table = ingenic_usb_phy_of_matches".
    
    v2->v3:
    1.Change "depends on (MACH_INGENIC && MIPS) || COMPILE_TEST" to
      "depends on MIPS || COMPILE_TEST".
    2.Keep the adjustments of "ingenic_usb_phy_init()" and "ingenic_usb_phu_exit()"
      positions in v2 to make them consistent with the order in "ingenic_usb_phy_ops",
      keep the adjustments to the positions of "ingenic_usb_phy_of_matches[]" in v2
      to keep them consistent with the styles of other USB PHY drivers. And remove
      some unnecessary changes to reduce the diff size, from the original 256 lines
      change to the current 209 lines.

 drivers/phy/Kconfig                                |   1 +
 drivers/phy/Makefile                               |   1 +
 drivers/phy/ingenic/Kconfig                        |  12 ++
 drivers/phy/ingenic/Makefile                       |   2 +
 .../phy-jz4770.c => phy/ingenic/phy-ingenic-usb.c} | 209 +++++++++++----------
 drivers/usb/phy/Kconfig                            |   8 -
 drivers/usb/phy/Makefile                           |   1 -
 7 files changed, 128 insertions(+), 106 deletions(-)
 create mode 100644 drivers/phy/ingenic/Kconfig
 create mode 100644 drivers/phy/ingenic/Makefile
 rename drivers/{usb/phy/phy-jz4770.c => phy/ingenic/phy-ingenic-usb.c} (71%)

diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index de9362c25c07..0534b0fdd057 100644
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -55,6 +55,7 @@ source "drivers/phy/broadcom/Kconfig"
 source "drivers/phy/cadence/Kconfig"
 source "drivers/phy/freescale/Kconfig"
 source "drivers/phy/hisilicon/Kconfig"
+source "drivers/phy/ingenic/Kconfig"
 source "drivers/phy/lantiq/Kconfig"
 source "drivers/phy/marvell/Kconfig"
 source "drivers/phy/mediatek/Kconfig"
diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
index c27408e4daae..ab24f0d20763 100644
--- a/drivers/phy/Makefile
+++ b/drivers/phy/Makefile
@@ -14,6 +14,7 @@ obj-y					+= allwinner/	\
 					   cadence/	\
 					   freescale/	\
 					   hisilicon/	\
+					   ingenic/	\
 					   intel/	\
 					   lantiq/	\
 					   marvell/	\
diff --git a/drivers/phy/ingenic/Kconfig b/drivers/phy/ingenic/Kconfig
new file mode 100644
index 000000000000..912b14e512cb
--- /dev/null
+++ b/drivers/phy/ingenic/Kconfig
@@ -0,0 +1,12 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Phy drivers for Ingenic platforms
+#
+config PHY_INGENIC_USB
+	tristate "Ingenic SoCs USB PHY Driver"
+	depends on MIPS || COMPILE_TEST
+	depends on USB_SUPPORT
+	select GENERIC_PHY
+	help
+	  This driver provides USB PHY support for the USB controller found
+	  on the JZ-series and X-series SoCs from Ingenic.
diff --git a/drivers/phy/ingenic/Makefile b/drivers/phy/ingenic/Makefile
new file mode 100644
index 000000000000..65d5ea00fc9d
--- /dev/null
+++ b/drivers/phy/ingenic/Makefile
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0
+obj-y		+= phy-ingenic-usb.o
diff --git a/drivers/usb/phy/phy-jz4770.c b/drivers/phy/ingenic/phy-ingenic-usb.c
similarity index 71%
rename from drivers/usb/phy/phy-jz4770.c
rename to drivers/phy/ingenic/phy-ingenic-usb.c
index 4025da20b3fd..1f2e811c9125 100644
--- a/drivers/usb/phy/phy-jz4770.c
+++ b/drivers/phy/ingenic/phy-ingenic-usb.c
@@ -7,12 +7,12 @@
  */
 
 #include <linux/clk.h>
+#include <linux/delay.h>
 #include <linux/io.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/consumer.h>
-#include <linux/usb/otg.h>
-#include <linux/usb/phy.h>
+#include <linux/phy/phy.h>
 
 /* OTGPHY register offsets */
 #define REG_USBPCR_OFFSET			0x00
@@ -97,68 +97,56 @@ enum ingenic_usb_phy_version {
 struct ingenic_soc_info {
 	enum ingenic_usb_phy_version version;
 
-	void (*usb_phy_init)(struct usb_phy *phy);
+	void (*usb_phy_init)(struct phy *phy);
 };
 
-struct jz4770_phy {
+struct ingenic_usb_phy {
 	const struct ingenic_soc_info *soc_info;
 
-	struct usb_phy phy;
-	struct usb_otg otg;
+	struct phy *phy;
 	struct device *dev;
 	void __iomem *base;
 	struct clk *clk;
 	struct regulator *vcc_supply;
 };
 
-static inline struct jz4770_phy *otg_to_jz4770_phy(struct usb_otg *otg)
+static int ingenic_usb_phy_init(struct phy *phy)
 {
-	return container_of(otg, struct jz4770_phy, otg);
-}
-
-static inline struct jz4770_phy *phy_to_jz4770_phy(struct usb_phy *phy)
-{
-	return container_of(phy, struct jz4770_phy, phy);
-}
-
-static int ingenic_usb_phy_set_peripheral(struct usb_otg *otg,
-				     struct usb_gadget *gadget)
-{
-	struct jz4770_phy *priv = otg_to_jz4770_phy(otg);
+	struct ingenic_usb_phy *priv = phy_get_drvdata(phy);
+	int err;
 	u32 reg;
 
-	if (priv->soc_info->version >= ID_X1000) {
-		reg = readl(priv->base + REG_USBPCR1_OFFSET);
-		reg |= USBPCR1_BVLD_REG;
-		writel(reg, priv->base + REG_USBPCR1_OFFSET);
+	err = clk_prepare_enable(priv->clk);
+	if (err) {
+		dev_err(priv->dev, "Unable to start clock: %d\n", err);
+		return err;
 	}
 
+	priv->soc_info->usb_phy_init(phy);
+
+	/* Wait for PHY to reset */
+	usleep_range(30, 300);
 	reg = readl(priv->base + REG_USBPCR_OFFSET);
-	reg &= ~USBPCR_USB_MODE;
-	reg |= USBPCR_VBUSVLDEXT | USBPCR_VBUSVLDEXTSEL | USBPCR_OTG_DISABLE;
-	writel(reg, priv->base + REG_USBPCR_OFFSET);
+	writel(reg & ~USBPCR_POR, priv->base + REG_USBPCR_OFFSET);
+	usleep_range(300, 1000);
 
 	return 0;
 }
 
-static int ingenic_usb_phy_set_host(struct usb_otg *otg, struct usb_bus *host)
+static int ingenic_usb_phy_exit(struct phy *phy)
 {
-	struct jz4770_phy *priv = otg_to_jz4770_phy(otg);
-	u32 reg;
+	struct ingenic_usb_phy *priv = phy_get_drvdata(phy);
 
-	reg = readl(priv->base + REG_USBPCR_OFFSET);
-	reg &= ~(USBPCR_VBUSVLDEXT | USBPCR_VBUSVLDEXTSEL | USBPCR_OTG_DISABLE);
-	reg |= USBPCR_USB_MODE;
-	writel(reg, priv->base + REG_USBPCR_OFFSET);
+	clk_disable_unprepare(priv->clk);
+	regulator_disable(priv->vcc_supply);
 
 	return 0;
 }
 
-static int ingenic_usb_phy_init(struct usb_phy *phy)
+static int ingenic_usb_phy_power_on(struct phy *phy)
 {
-	struct jz4770_phy *priv = phy_to_jz4770_phy(phy);
+	struct ingenic_usb_phy *priv = phy_get_drvdata(phy);
 	int err;
-	u32 reg;
 
 	err = regulator_enable(priv->vcc_supply);
 	if (err) {
@@ -166,39 +154,71 @@ static int ingenic_usb_phy_init(struct usb_phy *phy)
 		return err;
 	}
 
-	err = clk_prepare_enable(priv->clk);
-	if (err) {
-		dev_err(priv->dev, "Unable to start clock: %d\n", err);
-		return err;
-	}
-
-	priv->soc_info->usb_phy_init(phy);
-
-	/* Wait for PHY to reset */
-	usleep_range(30, 300);
-	reg = readl(priv->base + REG_USBPCR_OFFSET);
-	writel(reg & ~USBPCR_POR, priv->base + REG_USBPCR_OFFSET);
-	usleep_range(300, 1000);
-
 	return 0;
 }
 
-static void ingenic_usb_phy_shutdown(struct usb_phy *phy)
+static int ingenic_usb_phy_power_off(struct phy *phy)
 {
-	struct jz4770_phy *priv = phy_to_jz4770_phy(phy);
+	struct ingenic_usb_phy *priv = phy_get_drvdata(phy);
 
-	clk_disable_unprepare(priv->clk);
 	regulator_disable(priv->vcc_supply);
+
+	return 0;
 }
 
-static void ingenic_usb_phy_remove(void *phy)
+static int ingenic_usb_phy_set_mode(struct phy *phy,
+				  enum phy_mode mode, int submode)
 {
-	usb_remove_phy(phy);
+	struct ingenic_usb_phy *priv = phy_get_drvdata(phy);
+	u32 reg;
+
+	switch (mode) {
+	case PHY_MODE_USB_HOST:
+		reg = readl(priv->base + REG_USBPCR_OFFSET);
+		reg &= ~(USBPCR_VBUSVLDEXT | USBPCR_VBUSVLDEXTSEL | USBPCR_OTG_DISABLE);
+		reg |= USBPCR_USB_MODE;
+		writel(reg, priv->base + REG_USBPCR_OFFSET);
+
+		break;
+	case PHY_MODE_USB_DEVICE:
+		if (priv->soc_info->version >= ID_X1000) {
+			reg = readl(priv->base + REG_USBPCR1_OFFSET);
+			reg |= USBPCR1_BVLD_REG;
+			writel(reg, priv->base + REG_USBPCR1_OFFSET);
+		}
+
+		reg = readl(priv->base + REG_USBPCR_OFFSET);
+		reg &= ~USBPCR_USB_MODE;
+		reg |= USBPCR_VBUSVLDEXT | USBPCR_VBUSVLDEXTSEL | USBPCR_OTG_DISABLE;
+		writel(reg, priv->base + REG_USBPCR_OFFSET);
+
+		break;
+	case PHY_MODE_USB_OTG:
+		reg = readl(priv->base + REG_USBPCR_OFFSET);
+		reg &= ~USBPCR_OTG_DISABLE;
+		reg |= USBPCR_VBUSVLDEXT | USBPCR_VBUSVLDEXTSEL | USBPCR_USB_MODE;
+		writel(reg, priv->base + REG_USBPCR_OFFSET);
+
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
 }
 
-static void jz4770_usb_phy_init(struct usb_phy *phy)
+static const struct phy_ops ingenic_usb_phy_ops = {
+	.init		= ingenic_usb_phy_init,
+	.exit		= ingenic_usb_phy_exit,
+	.power_on	= ingenic_usb_phy_power_on,
+	.power_off	= ingenic_usb_phy_power_off,
+	.set_mode	= ingenic_usb_phy_set_mode,
+	.owner		= THIS_MODULE,
+};
+
+static void jz4770_usb_phy_init(struct phy *phy)
 {
-	struct jz4770_phy *priv = phy_to_jz4770_phy(phy);
+	struct ingenic_usb_phy *priv = phy_get_drvdata(phy);
 	u32 reg;
 
 	reg = USBPCR_AVLD_REG | USBPCR_COMMONONN | USBPCR_IDPULLUP_ALWAYS |
@@ -208,9 +228,9 @@ static void jz4770_usb_phy_init(struct usb_phy *phy)
 	writel(reg, priv->base + REG_USBPCR_OFFSET);
 }
 
-static void jz4780_usb_phy_init(struct usb_phy *phy)
+static void jz4780_usb_phy_init(struct phy *phy)
 {
-	struct jz4770_phy *priv = phy_to_jz4770_phy(phy);
+	struct ingenic_usb_phy *priv = phy_get_drvdata(phy);
 	u32 reg;
 
 	reg = readl(priv->base + REG_USBPCR1_OFFSET) | USBPCR1_USB_SEL |
@@ -221,9 +241,9 @@ static void jz4780_usb_phy_init(struct usb_phy *phy)
 	writel(reg, priv->base + REG_USBPCR_OFFSET);
 }
 
-static void x1000_usb_phy_init(struct usb_phy *phy)
+static void x1000_usb_phy_init(struct phy *phy)
 {
-	struct jz4770_phy *priv = phy_to_jz4770_phy(phy);
+	struct ingenic_usb_phy *priv = phy_get_drvdata(phy);
 	u32 reg;
 
 	reg = readl(priv->base + REG_USBPCR1_OFFSET) | USBPCR1_WORD_IF_16BIT;
@@ -235,9 +255,9 @@ static void x1000_usb_phy_init(struct usb_phy *phy)
 	writel(reg, priv->base + REG_USBPCR_OFFSET);
 }
 
-static void x1830_usb_phy_init(struct usb_phy *phy)
+static void x1830_usb_phy_init(struct phy *phy)
 {
-	struct jz4770_phy *priv = phy_to_jz4770_phy(phy);
+	struct ingenic_usb_phy *priv = phy_get_drvdata(phy);
 	u32 reg;
 
 	/* rdt */
@@ -276,43 +296,25 @@ static const struct ingenic_soc_info x1830_soc_info = {
 	.usb_phy_init = x1830_usb_phy_init,
 };
 
-static const struct of_device_id ingenic_usb_phy_of_matches[] = {
-	{ .compatible = "ingenic,jz4770-phy", .data = &jz4770_soc_info },
-	{ .compatible = "ingenic,jz4780-phy", .data = &jz4780_soc_info },
-	{ .compatible = "ingenic,x1000-phy", .data = &x1000_soc_info },
-	{ .compatible = "ingenic,x1830-phy", .data = &x1830_soc_info },
-	{ /* sentinel */ }
-};
-MODULE_DEVICE_TABLE(of, ingenic_usb_phy_of_matches);
-
-static int jz4770_phy_probe(struct platform_device *pdev)
+static int ingenic_usb_phy_probe(struct platform_device *pdev)
 {
+	struct ingenic_usb_phy *priv;
+	struct phy_provider *provider;
 	struct device *dev = &pdev->dev;
-	struct jz4770_phy *priv;
 	int err;
 
 	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;
 
-	priv->soc_info = device_get_match_data(&pdev->dev);
+	priv->soc_info = device_get_match_data(dev);
 	if (!priv->soc_info) {
-		dev_err(&pdev->dev, "Error: No device match found\n");
+		dev_err(dev, "Error: No device match found\n");
 		return -ENODEV;
 	}
 
 	platform_set_drvdata(pdev, priv);
 	priv->dev = dev;
-	priv->phy.dev = dev;
-	priv->phy.otg = &priv->otg;
-	priv->phy.label = "ingenic-usb-phy";
-	priv->phy.init = ingenic_usb_phy_init;
-	priv->phy.shutdown = ingenic_usb_phy_shutdown;
-
-	priv->otg.state = OTG_STATE_UNDEFINED;
-	priv->otg.usb_phy = &priv->phy;
-	priv->otg.set_host = ingenic_usb_phy_set_host;
-	priv->otg.set_peripheral = ingenic_usb_phy_set_peripheral;
 
 	priv->base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(priv->base)) {
@@ -336,27 +338,40 @@ static int jz4770_phy_probe(struct platform_device *pdev)
 		return err;
 	}
 
-	err = usb_add_phy(&priv->phy, USB_PHY_TYPE_USB2);
-	if (err) {
-		if (err != -EPROBE_DEFER)
-			dev_err(dev, "Unable to register PHY\n");
-		return err;
-	}
+	priv->phy = devm_phy_create(priv->dev, NULL, &ingenic_usb_phy_ops);
+	if (IS_ERR(priv))
+		return PTR_ERR(priv);
+
+	phy_set_drvdata(priv->phy, priv);
 
-	return devm_add_action_or_reset(dev, ingenic_usb_phy_remove, &priv->phy);
+	provider = devm_of_phy_provider_register(priv->dev, of_phy_simple_xlate);
+	if (IS_ERR(provider))
+		return PTR_ERR(provider);
+
+	return 0;
 }
 
-static struct platform_driver ingenic_phy_driver = {
-	.probe		= jz4770_phy_probe,
+static const struct of_device_id ingenic_usb_phy_of_matches[] = {
+	{ .compatible = "ingenic,jz4770-phy", .data = &jz4770_soc_info },
+	{ .compatible = "ingenic,jz4780-phy", .data = &jz4780_soc_info },
+	{ .compatible = "ingenic,x1000-phy", .data = &x1000_soc_info },
+	{ .compatible = "ingenic,x1830-phy", .data = &x1830_soc_info },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, ingenic_usb_phy_of_matches);
+
+static struct platform_driver ingenic_usb_phy_driver = {
+	.probe		= ingenic_usb_phy_probe,
 	.driver		= {
-		.name	= "jz4770-phy",
+		.name	= "ingenic-usb-phy",
 		.of_match_table = ingenic_usb_phy_of_matches,
 	},
 };
-module_platform_driver(ingenic_phy_driver);
+module_platform_driver(ingenic_usb_phy_driver);
 
 MODULE_AUTHOR("周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>");
 MODULE_AUTHOR("漆鹏振 (Qi Pengzhen) <aric.pzqi@ingenic.com>");
 MODULE_AUTHOR("Paul Cercueil <paul@crapouillou.net>");
 MODULE_DESCRIPTION("Ingenic SoCs USB PHY driver");
+MODULE_ALIAS("jz4770-phy");
 MODULE_LICENSE("GPL");
diff --git a/drivers/usb/phy/Kconfig b/drivers/usb/phy/Kconfig
index ef4787cd3d37..ff24fca0a2d9 100644
--- a/drivers/usb/phy/Kconfig
+++ b/drivers/usb/phy/Kconfig
@@ -184,12 +184,4 @@ config USB_ULPI_VIEWPORT
 	  Provides read/write operations to the ULPI phy register set for
 	  controllers with a viewport register (e.g. Chipidea/ARC controllers).
 
-config JZ4770_PHY
-	tristate "Ingenic SoCs Transceiver Driver"
-	depends on MIPS || COMPILE_TEST
-	select USB_PHY
-	help
-	  This driver provides PHY support for the USB controller found
-	  on the JZ-series and X-series SoCs from Ingenic.
-
 endmenu
diff --git a/drivers/usb/phy/Makefile b/drivers/usb/phy/Makefile
index b352bdbe8712..df1d99010079 100644
--- a/drivers/usb/phy/Makefile
+++ b/drivers/usb/phy/Makefile
@@ -24,4 +24,3 @@ obj-$(CONFIG_USB_MXS_PHY)		+= phy-mxs-usb.o
 obj-$(CONFIG_USB_ULPI)			+= phy-ulpi.o
 obj-$(CONFIG_USB_ULPI_VIEWPORT)		+= phy-ulpi-viewport.o
 obj-$(CONFIG_KEYSTONE_USB_PHY)		+= phy-keystone.o
-obj-$(CONFIG_JZ4770_PHY)		+= phy-jz4770.o
-- 
2.11.0

Re: [PATCH v3 2/2] USB: PHY: JZ4770: Use the generic PHY framework.

[Paul Cercueil]

Hi Zhou,

Le dim. 13 sept. 2020 à 14:34, 周琰杰 (Zhou Yanjie) 
<zhouyanjie@wanyeetech.com> a écrit :
> Used the generic PHY framework API to create the PHY,
> and move the driver to driver/phy/ingenic. And adjust
> the position of some codes to make it consistent with
> the style of other USB PHY drivers.
> 
> Tested-by: 周正 (Zhou Zheng) <sernia.zhou@foxmail.com>
> Co-developed-by: 漆鹏振 (Qi Pengzhen) <aric.pzqi@ingenic.com>
> Signed-off-by: 漆鹏振 (Qi Pengzhen) <aric.pzqi@ingenic.com>
> Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
> ---
> 
> Notes:
>     v1->v2:
>     Fix bug, ".of_match_table = 
> of_match_ptr(ingenic_usb_phy_of_matches)" is wrong
>     and should be replaced with ".of_match_table = 
> ingenic_usb_phy_of_matches".
> 
>     v2->v3:
>     1.Change "depends on (MACH_INGENIC && MIPS) || COMPILE_TEST" to
>       "depends on MIPS || COMPILE_TEST".
>     2.Keep the adjustments of "ingenic_usb_phy_init()" and 
> "ingenic_usb_phu_exit()"
>       positions in v2 to make them consistent with the order in 
> "ingenic_usb_phy_ops",
>       keep the adjustments to the positions of 
> "ingenic_usb_phy_of_matches[]" in v2
>       to keep them consistent with the styles of other USB PHY 
> drivers. And remove
>       some unnecessary changes to reduce the diff size, from the 
> original 256 lines
>       change to the current 209 lines.
> 
>  drivers/phy/Kconfig                                |   1 +
>  drivers/phy/Makefile                               |   1 +
>  drivers/phy/ingenic/Kconfig                        |  12 ++
>  drivers/phy/ingenic/Makefile                       |   2 +
>  .../phy-jz4770.c => phy/ingenic/phy-ingenic-usb.c} | 209 
> +++++++++++----------
>  drivers/usb/phy/Kconfig                            |   8 -
>  drivers/usb/phy/Makefile                           |   1 -
>  7 files changed, 128 insertions(+), 106 deletions(-)
>  create mode 100644 drivers/phy/ingenic/Kconfig
>  create mode 100644 drivers/phy/ingenic/Makefile
>  rename drivers/{usb/phy/phy-jz4770.c => 
> phy/ingenic/phy-ingenic-usb.c} (71%)
> 
> diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
> index de9362c25c07..0534b0fdd057 100644
> --- a/drivers/phy/Kconfig
> +++ b/drivers/phy/Kconfig
> @@ -55,6 +55,7 @@ source "drivers/phy/broadcom/Kconfig"
>  source "drivers/phy/cadence/Kconfig"
>  source "drivers/phy/freescale/Kconfig"
>  source "drivers/phy/hisilicon/Kconfig"
> +source "drivers/phy/ingenic/Kconfig"
>  source "drivers/phy/lantiq/Kconfig"
>  source "drivers/phy/marvell/Kconfig"
>  source "drivers/phy/mediatek/Kconfig"
> diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
> index c27408e4daae..ab24f0d20763 100644
> --- a/drivers/phy/Makefile
> +++ b/drivers/phy/Makefile
> @@ -14,6 +14,7 @@ obj-y					+= allwinner/	\
>  					   cadence/	\
>  					   freescale/	\
>  					   hisilicon/	\
> +					   ingenic/	\
>  					   intel/	\
>  					   lantiq/	\
>  					   marvell/	\
> diff --git a/drivers/phy/ingenic/Kconfig b/drivers/phy/ingenic/Kconfig
> new file mode 100644
> index 000000000000..912b14e512cb
> --- /dev/null
> +++ b/drivers/phy/ingenic/Kconfig
> @@ -0,0 +1,12 @@
> +# SPDX-License-Identifier: GPL-2.0
> +#
> +# Phy drivers for Ingenic platforms
> +#
> +config PHY_INGENIC_USB
> +	tristate "Ingenic SoCs USB PHY Driver"
> +	depends on MIPS || COMPILE_TEST
> +	depends on USB_SUPPORT
> +	select GENERIC_PHY
> +	help
> +	  This driver provides USB PHY support for the USB controller found
> +	  on the JZ-series and X-series SoCs from Ingenic.
> diff --git a/drivers/phy/ingenic/Makefile 
> b/drivers/phy/ingenic/Makefile
> new file mode 100644
> index 000000000000..65d5ea00fc9d
> --- /dev/null
> +++ b/drivers/phy/ingenic/Makefile
> @@ -0,0 +1,2 @@
> +# SPDX-License-Identifier: GPL-2.0
> +obj-y		+= phy-ingenic-usb.o
> diff --git a/drivers/usb/phy/phy-jz4770.c 
> b/drivers/phy/ingenic/phy-ingenic-usb.c
> similarity index 71%
> rename from drivers/usb/phy/phy-jz4770.c
> rename to drivers/phy/ingenic/phy-ingenic-usb.c
> index 4025da20b3fd..1f2e811c9125 100644
> --- a/drivers/usb/phy/phy-jz4770.c
> +++ b/drivers/phy/ingenic/phy-ingenic-usb.c
> @@ -7,12 +7,12 @@
>   */
> 
>  #include <linux/clk.h>
> +#include <linux/delay.h>
>  #include <linux/io.h>
>  #include <linux/module.h>
>  #include <linux/platform_device.h>
>  #include <linux/regulator/consumer.h>
> -#include <linux/usb/otg.h>
> -#include <linux/usb/phy.h>
> +#include <linux/phy/phy.h>
> 
>  /* OTGPHY register offsets */
>  #define REG_USBPCR_OFFSET			0x00
> @@ -97,68 +97,56 @@ enum ingenic_usb_phy_version {
>  struct ingenic_soc_info {
>  	enum ingenic_usb_phy_version version;
> 
> -	void (*usb_phy_init)(struct usb_phy *phy);
> +	void (*usb_phy_init)(struct phy *phy);
>  };
> 
> -struct jz4770_phy {
> +struct ingenic_usb_phy {
>  	const struct ingenic_soc_info *soc_info;
> 
> -	struct usb_phy phy;
> -	struct usb_otg otg;
> +	struct phy *phy;
>  	struct device *dev;
>  	void __iomem *base;
>  	struct clk *clk;
>  	struct regulator *vcc_supply;
>  };
> 
> -static inline struct jz4770_phy *otg_to_jz4770_phy(struct usb_otg 
> *otg)
> +static int ingenic_usb_phy_init(struct phy *phy)
>  {
> -	return container_of(otg, struct jz4770_phy, otg);
> -}
> -
> -static inline struct jz4770_phy *phy_to_jz4770_phy(struct usb_phy 
> *phy)
> -{
> -	return container_of(phy, struct jz4770_phy, phy);
> -}
> -
> -static int ingenic_usb_phy_set_peripheral(struct usb_otg *otg,
> -				     struct usb_gadget *gadget)
> -{
> -	struct jz4770_phy *priv = otg_to_jz4770_phy(otg);
> +	struct ingenic_usb_phy *priv = phy_get_drvdata(phy);
> +	int err;
>  	u32 reg;
> 
> -	if (priv->soc_info->version >= ID_X1000) {
> -		reg = readl(priv->base + REG_USBPCR1_OFFSET);
> -		reg |= USBPCR1_BVLD_REG;
> -		writel(reg, priv->base + REG_USBPCR1_OFFSET);
> +	err = clk_prepare_enable(priv->clk);
> +	if (err) {
> +		dev_err(priv->dev, "Unable to start clock: %d\n", err);
> +		return err;
>  	}
> 
> +	priv->soc_info->usb_phy_init(phy);
> +
> +	/* Wait for PHY to reset */
> +	usleep_range(30, 300);
>  	reg = readl(priv->base + REG_USBPCR_OFFSET);
> -	reg &= ~USBPCR_USB_MODE;
> -	reg |= USBPCR_VBUSVLDEXT | USBPCR_VBUSVLDEXTSEL | 
> USBPCR_OTG_DISABLE;
> -	writel(reg, priv->base + REG_USBPCR_OFFSET);
> +	writel(reg & ~USBPCR_POR, priv->base + REG_USBPCR_OFFSET);
> +	usleep_range(300, 1000);
> 
>  	return 0;
>  }
> 
> -static int ingenic_usb_phy_set_host(struct usb_otg *otg, struct 
> usb_bus *host)
> +static int ingenic_usb_phy_exit(struct phy *phy)
>  {
> -	struct jz4770_phy *priv = otg_to_jz4770_phy(otg);
> -	u32 reg;
> +	struct ingenic_usb_phy *priv = phy_get_drvdata(phy);
> 
> -	reg = readl(priv->base + REG_USBPCR_OFFSET);
> -	reg &= ~(USBPCR_VBUSVLDEXT | USBPCR_VBUSVLDEXTSEL | 
> USBPCR_OTG_DISABLE);
> -	reg |= USBPCR_USB_MODE;
> -	writel(reg, priv->base + REG_USBPCR_OFFSET);
> +	clk_disable_unprepare(priv->clk);
> +	regulator_disable(priv->vcc_supply);
> 
>  	return 0;
>  }

That part is still messy. You remove ingenic_usb_phy_set_peripheral() 
and ingenic_usb_phy_set_host(), then add ingenic_usb_phy_init() and 
ingenic_usb_phy_exit(). Why were the two first functions removed? Just 
keep these around, and call them from ingenic_usb_phy_set_mode(). That 
will automatically make the diff much smaller.

And by making the diff smaller, we can spot the actual differences. 
Like how support for PHY_MODE_USB_OTG was added, without any notice.

> 
> -static int ingenic_usb_phy_init(struct usb_phy *phy)
> +static int ingenic_usb_phy_power_on(struct phy *phy)
>  {
> -	struct jz4770_phy *priv = phy_to_jz4770_phy(phy);
> +	struct ingenic_usb_phy *priv = phy_get_drvdata(phy);
>  	int err;
> -	u32 reg;
> 
>  	err = regulator_enable(priv->vcc_supply);
>  	if (err) {
> @@ -166,39 +154,71 @@ static int ingenic_usb_phy_init(struct usb_phy 
> *phy)
>  		return err;
>  	}
> 
> -	err = clk_prepare_enable(priv->clk);
> -	if (err) {
> -		dev_err(priv->dev, "Unable to start clock: %d\n", err);
> -		return err;
> -	}
> -
> -	priv->soc_info->usb_phy_init(phy);
> -
> -	/* Wait for PHY to reset */
> -	usleep_range(30, 300);
> -	reg = readl(priv->base + REG_USBPCR_OFFSET);
> -	writel(reg & ~USBPCR_POR, priv->base + REG_USBPCR_OFFSET);
> -	usleep_range(300, 1000);
> -
>  	return 0;
>  }
> 
> -static void ingenic_usb_phy_shutdown(struct usb_phy *phy)
> +static int ingenic_usb_phy_power_off(struct phy *phy)
>  {
> -	struct jz4770_phy *priv = phy_to_jz4770_phy(phy);
> +	struct ingenic_usb_phy *priv = phy_get_drvdata(phy);
> 
> -	clk_disable_unprepare(priv->clk);
>  	regulator_disable(priv->vcc_supply);
> +
> +	return 0;
>  }
> 
> -static void ingenic_usb_phy_remove(void *phy)
> +static int ingenic_usb_phy_set_mode(struct phy *phy,
> +				  enum phy_mode mode, int submode)
>  {
> -	usb_remove_phy(phy);
> +	struct ingenic_usb_phy *priv = phy_get_drvdata(phy);
> +	u32 reg;
> +
> +	switch (mode) {
> +	case PHY_MODE_USB_HOST:
> +		reg = readl(priv->base + REG_USBPCR_OFFSET);
> +		reg &= ~(USBPCR_VBUSVLDEXT | USBPCR_VBUSVLDEXTSEL | 
> USBPCR_OTG_DISABLE);
> +		reg |= USBPCR_USB_MODE;
> +		writel(reg, priv->base + REG_USBPCR_OFFSET);
> +
> +		break;
> +	case PHY_MODE_USB_DEVICE:
> +		if (priv->soc_info->version >= ID_X1000) {
> +			reg = readl(priv->base + REG_USBPCR1_OFFSET);
> +			reg |= USBPCR1_BVLD_REG;
> +			writel(reg, priv->base + REG_USBPCR1_OFFSET);
> +		}
> +
> +		reg = readl(priv->base + REG_USBPCR_OFFSET);
> +		reg &= ~USBPCR_USB_MODE;
> +		reg |= USBPCR_VBUSVLDEXT | USBPCR_VBUSVLDEXTSEL | 
> USBPCR_OTG_DISABLE;
> +		writel(reg, priv->base + REG_USBPCR_OFFSET);
> +
> +		break;
> +	case PHY_MODE_USB_OTG:
> +		reg = readl(priv->base + REG_USBPCR_OFFSET);
> +		reg &= ~USBPCR_OTG_DISABLE;
> +		reg |= USBPCR_VBUSVLDEXT | USBPCR_VBUSVLDEXTSEL | USBPCR_USB_MODE;
> +		writel(reg, priv->base + REG_USBPCR_OFFSET);
> +
> +		break;
> +	default:
> +		return -EINVAL;
> +	}
> +
> +	return 0;
>  }
> 
> -static void jz4770_usb_phy_init(struct usb_phy *phy)
> +static const struct phy_ops ingenic_usb_phy_ops = {
> +	.init		= ingenic_usb_phy_init,
> +	.exit		= ingenic_usb_phy_exit,
> +	.power_on	= ingenic_usb_phy_power_on,
> +	.power_off	= ingenic_usb_phy_power_off,
> +	.set_mode	= ingenic_usb_phy_set_mode,
> +	.owner		= THIS_MODULE,
> +};
> +
> +static void jz4770_usb_phy_init(struct phy *phy)
>  {
> -	struct jz4770_phy *priv = phy_to_jz4770_phy(phy);
> +	struct ingenic_usb_phy *priv = phy_get_drvdata(phy);
>  	u32 reg;
> 
>  	reg = USBPCR_AVLD_REG | USBPCR_COMMONONN | USBPCR_IDPULLUP_ALWAYS |
> @@ -208,9 +228,9 @@ static void jz4770_usb_phy_init(struct usb_phy 
> *phy)
>  	writel(reg, priv->base + REG_USBPCR_OFFSET);
>  }
> 
> -static void jz4780_usb_phy_init(struct usb_phy *phy)
> +static void jz4780_usb_phy_init(struct phy *phy)
>  {
> -	struct jz4770_phy *priv = phy_to_jz4770_phy(phy);
> +	struct ingenic_usb_phy *priv = phy_get_drvdata(phy);
>  	u32 reg;
> 
>  	reg = readl(priv->base + REG_USBPCR1_OFFSET) | USBPCR1_USB_SEL |
> @@ -221,9 +241,9 @@ static void jz4780_usb_phy_init(struct usb_phy 
> *phy)
>  	writel(reg, priv->base + REG_USBPCR_OFFSET);
>  }
> 
> -static void x1000_usb_phy_init(struct usb_phy *phy)
> +static void x1000_usb_phy_init(struct phy *phy)
>  {
> -	struct jz4770_phy *priv = phy_to_jz4770_phy(phy);
> +	struct ingenic_usb_phy *priv = phy_get_drvdata(phy);
>  	u32 reg;
> 
>  	reg = readl(priv->base + REG_USBPCR1_OFFSET) | 
> USBPCR1_WORD_IF_16BIT;
> @@ -235,9 +255,9 @@ static void x1000_usb_phy_init(struct usb_phy 
> *phy)
>  	writel(reg, priv->base + REG_USBPCR_OFFSET);
>  }
> 
> -static void x1830_usb_phy_init(struct usb_phy *phy)
> +static void x1830_usb_phy_init(struct phy *phy)
>  {
> -	struct jz4770_phy *priv = phy_to_jz4770_phy(phy);
> +	struct ingenic_usb_phy *priv = phy_get_drvdata(phy);
>  	u32 reg;
> 
>  	/* rdt */
> @@ -276,43 +296,25 @@ static const struct ingenic_soc_info 
> x1830_soc_info = {
>  	.usb_phy_init = x1830_usb_phy_init,
>  };
> 
> -static const struct of_device_id ingenic_usb_phy_of_matches[] = {
> -	{ .compatible = "ingenic,jz4770-phy", .data = &jz4770_soc_info },
> -	{ .compatible = "ingenic,jz4780-phy", .data = &jz4780_soc_info },
> -	{ .compatible = "ingenic,x1000-phy", .data = &x1000_soc_info },
> -	{ .compatible = "ingenic,x1830-phy", .data = &x1830_soc_info },
> -	{ /* sentinel */ }
> -};
> -MODULE_DEVICE_TABLE(of, ingenic_usb_phy_of_matches);

Why move that array?

> -
> -static int jz4770_phy_probe(struct platform_device *pdev)
> +static int ingenic_usb_phy_probe(struct platform_device *pdev)
>  {
> +	struct ingenic_usb_phy *priv;
> +	struct phy_provider *provider;
>  	struct device *dev = &pdev->dev;
> -	struct jz4770_phy *priv;
>  	int err;
> 
>  	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
>  	if (!priv)
>  		return -ENOMEM;
> 
> -	priv->soc_info = device_get_match_data(&pdev->dev);
> +	priv->soc_info = device_get_match_data(dev);
>  	if (!priv->soc_info) {
> -		dev_err(&pdev->dev, "Error: No device match found\n");
> +		dev_err(dev, "Error: No device match found\n");
>  		return -ENODEV;
>  	}
> 
>  	platform_set_drvdata(pdev, priv);
>  	priv->dev = dev;
> -	priv->phy.dev = dev;
> -	priv->phy.otg = &priv->otg;
> -	priv->phy.label = "ingenic-usb-phy";
> -	priv->phy.init = ingenic_usb_phy_init;
> -	priv->phy.shutdown = ingenic_usb_phy_shutdown;
> -
> -	priv->otg.state = OTG_STATE_UNDEFINED;
> -	priv->otg.usb_phy = &priv->phy;
> -	priv->otg.set_host = ingenic_usb_phy_set_host;
> -	priv->otg.set_peripheral = ingenic_usb_phy_set_peripheral;
> 
>  	priv->base = devm_platform_ioremap_resource(pdev, 0);
>  	if (IS_ERR(priv->base)) {
> @@ -336,27 +338,40 @@ static int jz4770_phy_probe(struct 
> platform_device *pdev)
>  		return err;
>  	}
> 
> -	err = usb_add_phy(&priv->phy, USB_PHY_TYPE_USB2);
> -	if (err) {
> -		if (err != -EPROBE_DEFER)
> -			dev_err(dev, "Unable to register PHY\n");
> -		return err;
> -	}
> +	priv->phy = devm_phy_create(priv->dev, NULL, &ingenic_usb_phy_ops);

You can use 'dev' directly.

> +	if (IS_ERR(priv))
> +		return PTR_ERR(priv);
> +
> +	phy_set_drvdata(priv->phy, priv);
> 
> -	return devm_add_action_or_reset(dev, ingenic_usb_phy_remove, 
> &priv->phy);
> +	provider = devm_of_phy_provider_register(priv->dev, 
> of_phy_simple_xlate);
> +	if (IS_ERR(provider))
> +		return PTR_ERR(provider);
> +
> +	return 0;

return demv_of_phy_provider_register(dev, ...)

>  }
> 
> -static struct platform_driver ingenic_phy_driver = {
> -	.probe		= jz4770_phy_probe,
> +static const struct of_device_id ingenic_usb_phy_of_matches[] = {
> +	{ .compatible = "ingenic,jz4770-phy", .data = &jz4770_soc_info },
> +	{ .compatible = "ingenic,jz4780-phy", .data = &jz4780_soc_info },
> +	{ .compatible = "ingenic,x1000-phy", .data = &x1000_soc_info },
> +	{ .compatible = "ingenic,x1830-phy", .data = &x1830_soc_info },
> +	{ /* sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(of, ingenic_usb_phy_of_matches);
> +
> +static struct platform_driver ingenic_usb_phy_driver = {
> +	.probe		= ingenic_usb_phy_probe,
>  	.driver		= {
> -		.name	= "jz4770-phy",
> +		.name	= "ingenic-usb-phy",
>  		.of_match_table = ingenic_usb_phy_of_matches,
>  	},
>  };
> -module_platform_driver(ingenic_phy_driver);
> +module_platform_driver(ingenic_usb_phy_driver);
> 
>  MODULE_AUTHOR("周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>");
>  MODULE_AUTHOR("漆鹏振 (Qi Pengzhen) <aric.pzqi@ingenic.com>");
>  MODULE_AUTHOR("Paul Cercueil <paul@crapouillou.net>");
>  MODULE_DESCRIPTION("Ingenic SoCs USB PHY driver");
> +MODULE_ALIAS("jz4770-phy");

So I first thought this generic PHY driver would be a drop-in 
replacement for the old jz4770-phy driver, that's why I suggested to 
add the jz4770-phy alias. But it turns out that it's a completely 
different framework, so we can drop the alias.

That also means that this patch, without any change to the JZ4740 MUSB 
driver, breaks USB on all Ingenic SoCs I can test with.

So unless you have a patch to the jz4740-musb driver in this series, 
you can't remove the old jz4770-phy driver yet. Just modify this patch 
so that the new generic-PHY driver is added, without removing the old 
one. It will be much easier to review (one new driver vs lots of +/- 
lines) and you can move the code around if you want to. Then when the 
jz4740-musb driver is modified to use the generic PHY framework, the 
old jz4770-phy driver can be "retired".

Cheers,
-Paul

>  MODULE_LICENSE("GPL");
> diff --git a/drivers/usb/phy/Kconfig b/drivers/usb/phy/Kconfig
> index ef4787cd3d37..ff24fca0a2d9 100644
> --- a/drivers/usb/phy/Kconfig
> +++ b/drivers/usb/phy/Kconfig
> @@ -184,12 +184,4 @@ config USB_ULPI_VIEWPORT
>  	  Provides read/write operations to the ULPI phy register set for
>  	  controllers with a viewport register (e.g. Chipidea/ARC 
> controllers).
> 
> -config JZ4770_PHY
> -	tristate "Ingenic SoCs Transceiver Driver"
> -	depends on MIPS || COMPILE_TEST
> -	select USB_PHY
> -	help
> -	  This driver provides PHY support for the USB controller found
> -	  on the JZ-series and X-series SoCs from Ingenic.
> -
>  endmenu
> diff --git a/drivers/usb/phy/Makefile b/drivers/usb/phy/Makefile
> index b352bdbe8712..df1d99010079 100644
> --- a/drivers/usb/phy/Makefile
> +++ b/drivers/usb/phy/Makefile
> @@ -24,4 +24,3 @@ obj-$(CONFIG_USB_MXS_PHY)		+= phy-mxs-usb.o
>  obj-$(CONFIG_USB_ULPI)			+= phy-ulpi.o
>  obj-$(CONFIG_USB_ULPI_VIEWPORT)		+= phy-ulpi-viewport.o
>  obj-$(CONFIG_KEYSTONE_USB_PHY)		+= phy-keystone.o
> -obj-$(CONFIG_JZ4770_PHY)		+= phy-jz4770.o
> --
> 2.11.0
> 

Re: [PATCH v3 2/2] USB: PHY: JZ4770: Use the generic PHY framework.

[kernel test robot]

[-- Attachment #1: Type: text/plain, Size: 1168 bytes --]

Hi "周琰杰,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on balbi-usb/testing/next]
[also build test WARNING on usb/usb-testing linus/master v5.9-rc5 next-20200915]
[cannot apply to phy/next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Zhou-Yanjie/Use-the-generic-PHY-framework-for-Ingenic-USB-PHY/20200913-143611
base:   https://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb.git testing/next
config: sh-randconfig-c003-20200916 (attached as .config)
compiler: sh4-linux-gcc (GCC) 9.3.0

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>


coccinelle warnings: (new ones prefixed by >>)

>> drivers/phy/ingenic/phy-ingenic-usb.c:348:1-3: WARNING: PTR_ERR_OR_ZERO can be used

Please review and possibly fold the followup patch.

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

[-- Attachment #2: config.gz --]
[-- Type: application/gzip, Size: 23437 bytes --]

[PATCH] USB: PHY: JZ4770: fix ptr_ret.cocci warnings

[kernel test robot]

From: kernel test robot <lkp@intel.com>

drivers/phy/ingenic/phy-ingenic-usb.c:348:1-3: WARNING: PTR_ERR_OR_ZERO can be used


 Use PTR_ERR_OR_ZERO rather than if(IS_ERR(...)) + PTR_ERR

Generated by: scripts/coccinelle/api/ptr_ret.cocci

CC: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
Signed-off-by: kernel test robot <lkp@intel.com>
---

url:    https://github.com/0day-ci/linux/commits/Zhou-Yanjie/Use-the-generic-PHY-framework-for-Ingenic-USB-PHY/20200913-143611
base:   https://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb.git testing/next

 phy-ingenic-usb.c |    5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

--- a/drivers/phy/ingenic/phy-ingenic-usb.c
+++ b/drivers/phy/ingenic/phy-ingenic-usb.c
@@ -345,10 +345,7 @@ static int ingenic_usb_phy_probe(struct
 	phy_set_drvdata(priv->phy, priv);
 
 	provider = devm_of_phy_provider_register(priv->dev, of_phy_simple_xlate);
-	if (IS_ERR(provider))
-		return PTR_ERR(provider);
-
-	return 0;
+	return PTR_ERR_OR_ZERO(provider);
 }
 
 static const struct of_device_id ingenic_usb_phy_of_matches[] = {

[PATCH] USB: PHY: JZ4770: fix ptr_ret.cocci warnings

[kernel test robot]

[-- Attachment #1: Type: text/plain, Size: 1110 bytes --]

From: kernel test robot <lkp@intel.com>

drivers/phy/ingenic/phy-ingenic-usb.c:348:1-3: WARNING: PTR_ERR_OR_ZERO can be used


 Use PTR_ERR_OR_ZERO rather than if(IS_ERR(...)) + PTR_ERR

Generated by: scripts/coccinelle/api/ptr_ret.cocci

CC: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
Signed-off-by: kernel test robot <lkp@intel.com>
---

url:    https://github.com/0day-ci/linux/commits/Zhou-Yanjie/Use-the-generic-PHY-framework-for-Ingenic-USB-PHY/20200913-143611
base:   https://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb.git testing/next

 phy-ingenic-usb.c |    5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

--- a/drivers/phy/ingenic/phy-ingenic-usb.c
+++ b/drivers/phy/ingenic/phy-ingenic-usb.c
@@ -345,10 +345,7 @@ static int ingenic_usb_phy_probe(struct
 	phy_set_drvdata(priv->phy, priv);
 
 	provider = devm_of_phy_provider_register(priv->dev, of_phy_simple_xlate);
-	if (IS_ERR(provider))
-		return PTR_ERR(provider);
-
-	return 0;
+	return PTR_ERR_OR_ZERO(provider);
 }
 
 static const struct of_device_id ingenic_usb_phy_of_matches[] = {

Re: [PATCH v3 2/2] USB: PHY: JZ4770: Use the generic PHY framework.

[Zhou Yanjie]

Hi Paul,

在 2020/9/16 上午6:47, Paul Cercueil 写道:
> Hi Zhou,
>
> Le dim. 13 sept. 2020 à 14:34, 周琰杰 (Zhou Yanjie) 
> <zhouyanjie@wanyeetech.com> a écrit :
>> Used the generic PHY framework API to create the PHY,
>> and move the driver to driver/phy/ingenic. And adjust
>> the position of some codes to make it consistent with
>> the style of other USB PHY drivers.
>>
>> Tested-by: 周正 (Zhou Zheng) <sernia.zhou@foxmail.com>
>> Co-developed-by: 漆鹏振 (Qi Pengzhen) <aric.pzqi@ingenic.com>
>> Signed-off-by: 漆鹏振 (Qi Pengzhen) <aric.pzqi@ingenic.com>
>> Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
>> ---
>>
>> Notes:
>>     v1->v2:
>>     Fix bug, ".of_match_table = 
>> of_match_ptr(ingenic_usb_phy_of_matches)" is wrong
>>     and should be replaced with ".of_match_table = 
>> ingenic_usb_phy_of_matches".
>>
>>     v2->v3:
>>     1.Change "depends on (MACH_INGENIC && MIPS) || COMPILE_TEST" to
>>       "depends on MIPS || COMPILE_TEST".
>>     2.Keep the adjustments of "ingenic_usb_phy_init()" and 
>> "ingenic_usb_phu_exit()"
>>       positions in v2 to make them consistent with the order in 
>> "ingenic_usb_phy_ops",
>>       keep the adjustments to the positions of 
>> "ingenic_usb_phy_of_matches[]" in v2
>>       to keep them consistent with the styles of other USB PHY 
>> drivers. And remove
>>       some unnecessary changes to reduce the diff size, from the 
>> original 256 lines
>>       change to the current 209 lines.
>>
>>  drivers/phy/Kconfig                                |   1 +
>>  drivers/phy/Makefile                               |   1 +
>>  drivers/phy/ingenic/Kconfig                        |  12 ++
>>  drivers/phy/ingenic/Makefile                       |   2 +
>>  .../phy-jz4770.c => phy/ingenic/phy-ingenic-usb.c} | 209 
>> +++++++++++----------
>>  drivers/usb/phy/Kconfig                            |   8 -
>>  drivers/usb/phy/Makefile                           |   1 -
>>  7 files changed, 128 insertions(+), 106 deletions(-)
>>  create mode 100644 drivers/phy/ingenic/Kconfig
>>  create mode 100644 drivers/phy/ingenic/Makefile
>>  rename drivers/{usb/phy/phy-jz4770.c => 
>> phy/ingenic/phy-ingenic-usb.c} (71%)
>>
>> diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
>> index de9362c25c07..0534b0fdd057 100644
>> --- a/drivers/phy/Kconfig
>> +++ b/drivers/phy/Kconfig
>> @@ -55,6 +55,7 @@ source "drivers/phy/broadcom/Kconfig"
>>  source "drivers/phy/cadence/Kconfig"
>>  source "drivers/phy/freescale/Kconfig"
>>  source "drivers/phy/hisilicon/Kconfig"
>> +source "drivers/phy/ingenic/Kconfig"
>>  source "drivers/phy/lantiq/Kconfig"
>>  source "drivers/phy/marvell/Kconfig"
>>  source "drivers/phy/mediatek/Kconfig"
>> diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
>> index c27408e4daae..ab24f0d20763 100644
>> --- a/drivers/phy/Makefile
>> +++ b/drivers/phy/Makefile
>> @@ -14,6 +14,7 @@ obj-y                    += allwinner/    \
>>                         cadence/    \
>>                         freescale/    \
>>                         hisilicon/    \
>> +                       ingenic/    \
>>                         intel/    \
>>                         lantiq/    \
>>                         marvell/    \
>> diff --git a/drivers/phy/ingenic/Kconfig b/drivers/phy/ingenic/Kconfig
>> new file mode 100644
>> index 000000000000..912b14e512cb
>> --- /dev/null
>> +++ b/drivers/phy/ingenic/Kconfig
>> @@ -0,0 +1,12 @@
>> +# SPDX-License-Identifier: GPL-2.0
>> +#
>> +# Phy drivers for Ingenic platforms
>> +#
>> +config PHY_INGENIC_USB
>> +    tristate "Ingenic SoCs USB PHY Driver"
>> +    depends on MIPS || COMPILE_TEST
>> +    depends on USB_SUPPORT
>> +    select GENERIC_PHY
>> +    help
>> +      This driver provides USB PHY support for the USB controller found
>> +      on the JZ-series and X-series SoCs from Ingenic.
>> diff --git a/drivers/phy/ingenic/Makefile b/drivers/phy/ingenic/Makefile
>> new file mode 100644
>> index 000000000000..65d5ea00fc9d
>> --- /dev/null
>> +++ b/drivers/phy/ingenic/Makefile
>> @@ -0,0 +1,2 @@
>> +# SPDX-License-Identifier: GPL-2.0
>> +obj-y        += phy-ingenic-usb.o
>> diff --git a/drivers/usb/phy/phy-jz4770.c 
>> b/drivers/phy/ingenic/phy-ingenic-usb.c
>> similarity index 71%
>> rename from drivers/usb/phy/phy-jz4770.c
>> rename to drivers/phy/ingenic/phy-ingenic-usb.c
>> index 4025da20b3fd..1f2e811c9125 100644
>> --- a/drivers/usb/phy/phy-jz4770.c
>> +++ b/drivers/phy/ingenic/phy-ingenic-usb.c
>> @@ -7,12 +7,12 @@
>>   */
>>
>>  #include <linux/clk.h>
>> +#include <linux/delay.h>
>>  #include <linux/io.h>
>>  #include <linux/module.h>
>>  #include <linux/platform_device.h>
>>  #include <linux/regulator/consumer.h>
>> -#include <linux/usb/otg.h>
>> -#include <linux/usb/phy.h>
>> +#include <linux/phy/phy.h>
>>
>>  /* OTGPHY register offsets */
>>  #define REG_USBPCR_OFFSET            0x00
>> @@ -97,68 +97,56 @@ enum ingenic_usb_phy_version {
>>  struct ingenic_soc_info {
>>      enum ingenic_usb_phy_version version;
>>
>> -    void (*usb_phy_init)(struct usb_phy *phy);
>> +    void (*usb_phy_init)(struct phy *phy);
>>  };
>>
>> -struct jz4770_phy {
>> +struct ingenic_usb_phy {
>>      const struct ingenic_soc_info *soc_info;
>>
>> -    struct usb_phy phy;
>> -    struct usb_otg otg;
>> +    struct phy *phy;
>>      struct device *dev;
>>      void __iomem *base;
>>      struct clk *clk;
>>      struct regulator *vcc_supply;
>>  };
>>
>> -static inline struct jz4770_phy *otg_to_jz4770_phy(struct usb_otg *otg)
>> +static int ingenic_usb_phy_init(struct phy *phy)
>>  {
>> -    return container_of(otg, struct jz4770_phy, otg);
>> -}
>> -
>> -static inline struct jz4770_phy *phy_to_jz4770_phy(struct usb_phy *phy)
>> -{
>> -    return container_of(phy, struct jz4770_phy, phy);
>> -}
>> -
>> -static int ingenic_usb_phy_set_peripheral(struct usb_otg *otg,
>> -                     struct usb_gadget *gadget)
>> -{
>> -    struct jz4770_phy *priv = otg_to_jz4770_phy(otg);
>> +    struct ingenic_usb_phy *priv = phy_get_drvdata(phy);
>> +    int err;
>>      u32 reg;
>>
>> -    if (priv->soc_info->version >= ID_X1000) {
>> -        reg = readl(priv->base + REG_USBPCR1_OFFSET);
>> -        reg |= USBPCR1_BVLD_REG;
>> -        writel(reg, priv->base + REG_USBPCR1_OFFSET);
>> +    err = clk_prepare_enable(priv->clk);
>> +    if (err) {
>> +        dev_err(priv->dev, "Unable to start clock: %d\n", err);
>> +        return err;
>>      }
>>
>> +    priv->soc_info->usb_phy_init(phy);
>> +
>> +    /* Wait for PHY to reset */
>> +    usleep_range(30, 300);
>>      reg = readl(priv->base + REG_USBPCR_OFFSET);
>> -    reg &= ~USBPCR_USB_MODE;
>> -    reg |= USBPCR_VBUSVLDEXT | USBPCR_VBUSVLDEXTSEL | 
>> USBPCR_OTG_DISABLE;
>> -    writel(reg, priv->base + REG_USBPCR_OFFSET);
>> +    writel(reg & ~USBPCR_POR, priv->base + REG_USBPCR_OFFSET);
>> +    usleep_range(300, 1000);
>>
>>      return 0;
>>  }
>>
>> -static int ingenic_usb_phy_set_host(struct usb_otg *otg, struct 
>> usb_bus *host)
>> +static int ingenic_usb_phy_exit(struct phy *phy)
>>  {
>> -    struct jz4770_phy *priv = otg_to_jz4770_phy(otg);
>> -    u32 reg;
>> +    struct ingenic_usb_phy *priv = phy_get_drvdata(phy);
>>
>> -    reg = readl(priv->base + REG_USBPCR_OFFSET);
>> -    reg &= ~(USBPCR_VBUSVLDEXT | USBPCR_VBUSVLDEXTSEL | 
>> USBPCR_OTG_DISABLE);
>> -    reg |= USBPCR_USB_MODE;
>> -    writel(reg, priv->base + REG_USBPCR_OFFSET);
>> +    clk_disable_unprepare(priv->clk);
>> +    regulator_disable(priv->vcc_supply);
>>
>>      return 0;
>>  }
>
> That part is still messy. You remove ingenic_usb_phy_set_peripheral() 
> and ingenic_usb_phy_set_host(), then add ingenic_usb_phy_init() and 
> ingenic_usb_phy_exit(). Why were the two first functions removed? Just 
> keep these around, and call them from ingenic_usb_phy_set_mode(). That 
> will automatically make the diff much smaller.
>
> And by making the diff smaller, we can spot the actual differences. 
> Like how support for PHY_MODE_USB_OTG was added, without any notice.
>

Indeed, after following your suggestion, the diff can be reduced a lot. 
I was too entangled in trying to be consistent with the order and style 
in orther phy drivers. :(

>>
>> -static int ingenic_usb_phy_init(struct usb_phy *phy)
>> +static int ingenic_usb_phy_power_on(struct phy *phy)
>>  {
>> -    struct jz4770_phy *priv = phy_to_jz4770_phy(phy);
>> +    struct ingenic_usb_phy *priv = phy_get_drvdata(phy);
>>      int err;
>> -    u32 reg;
>>
>>      err = regulator_enable(priv->vcc_supply);
>>      if (err) {
>> @@ -166,39 +154,71 @@ static int ingenic_usb_phy_init(struct usb_phy 
>> *phy)
>>          return err;
>>      }
>>
>> -    err = clk_prepare_enable(priv->clk);
>> -    if (err) {
>> -        dev_err(priv->dev, "Unable to start clock: %d\n", err);
>> -        return err;
>> -    }
>> -
>> -    priv->soc_info->usb_phy_init(phy);
>> -
>> -    /* Wait for PHY to reset */
>> -    usleep_range(30, 300);
>> -    reg = readl(priv->base + REG_USBPCR_OFFSET);
>> -    writel(reg & ~USBPCR_POR, priv->base + REG_USBPCR_OFFSET);
>> -    usleep_range(300, 1000);
>> -
>>      return 0;
>>  }
>>
>> -static void ingenic_usb_phy_shutdown(struct usb_phy *phy)
>> +static int ingenic_usb_phy_power_off(struct phy *phy)
>>  {
>> -    struct jz4770_phy *priv = phy_to_jz4770_phy(phy);
>> +    struct ingenic_usb_phy *priv = phy_get_drvdata(phy);
>>
>> -    clk_disable_unprepare(priv->clk);
>>      regulator_disable(priv->vcc_supply);
>> +
>> +    return 0;
>>  }
>>
>> -static void ingenic_usb_phy_remove(void *phy)
>> +static int ingenic_usb_phy_set_mode(struct phy *phy,
>> +                  enum phy_mode mode, int submode)
>>  {
>> -    usb_remove_phy(phy);
>> +    struct ingenic_usb_phy *priv = phy_get_drvdata(phy);
>> +    u32 reg;
>> +
>> +    switch (mode) {
>> +    case PHY_MODE_USB_HOST:
>> +        reg = readl(priv->base + REG_USBPCR_OFFSET);
>> +        reg &= ~(USBPCR_VBUSVLDEXT | USBPCR_VBUSVLDEXTSEL | 
>> USBPCR_OTG_DISABLE);
>> +        reg |= USBPCR_USB_MODE;
>> +        writel(reg, priv->base + REG_USBPCR_OFFSET);
>> +
>> +        break;
>> +    case PHY_MODE_USB_DEVICE:
>> +        if (priv->soc_info->version >= ID_X1000) {
>> +            reg = readl(priv->base + REG_USBPCR1_OFFSET);
>> +            reg |= USBPCR1_BVLD_REG;
>> +            writel(reg, priv->base + REG_USBPCR1_OFFSET);
>> +        }
>> +
>> +        reg = readl(priv->base + REG_USBPCR_OFFSET);
>> +        reg &= ~USBPCR_USB_MODE;
>> +        reg |= USBPCR_VBUSVLDEXT | USBPCR_VBUSVLDEXTSEL | 
>> USBPCR_OTG_DISABLE;
>> +        writel(reg, priv->base + REG_USBPCR_OFFSET);
>> +
>> +        break;
>> +    case PHY_MODE_USB_OTG:
>> +        reg = readl(priv->base + REG_USBPCR_OFFSET);
>> +        reg &= ~USBPCR_OTG_DISABLE;
>> +        reg |= USBPCR_VBUSVLDEXT | USBPCR_VBUSVLDEXTSEL | 
>> USBPCR_USB_MODE;
>> +        writel(reg, priv->base + REG_USBPCR_OFFSET);
>> +
>> +        break;
>> +    default:
>> +        return -EINVAL;
>> +    }
>> +
>> +    return 0;
>>  }
>>
>> -static void jz4770_usb_phy_init(struct usb_phy *phy)
>> +static const struct phy_ops ingenic_usb_phy_ops = {
>> +    .init        = ingenic_usb_phy_init,
>> +    .exit        = ingenic_usb_phy_exit,
>> +    .power_on    = ingenic_usb_phy_power_on,
>> +    .power_off    = ingenic_usb_phy_power_off,
>> +    .set_mode    = ingenic_usb_phy_set_mode,
>> +    .owner        = THIS_MODULE,
>> +};
>> +
>> +static void jz4770_usb_phy_init(struct phy *phy)
>>  {
>> -    struct jz4770_phy *priv = phy_to_jz4770_phy(phy);
>> +    struct ingenic_usb_phy *priv = phy_get_drvdata(phy);
>>      u32 reg;
>>
>>      reg = USBPCR_AVLD_REG | USBPCR_COMMONONN | USBPCR_IDPULLUP_ALWAYS |
>> @@ -208,9 +228,9 @@ static void jz4770_usb_phy_init(struct usb_phy *phy)
>>      writel(reg, priv->base + REG_USBPCR_OFFSET);
>>  }
>>
>> -static void jz4780_usb_phy_init(struct usb_phy *phy)
>> +static void jz4780_usb_phy_init(struct phy *phy)
>>  {
>> -    struct jz4770_phy *priv = phy_to_jz4770_phy(phy);
>> +    struct ingenic_usb_phy *priv = phy_get_drvdata(phy);
>>      u32 reg;
>>
>>      reg = readl(priv->base + REG_USBPCR1_OFFSET) | USBPCR1_USB_SEL |
>> @@ -221,9 +241,9 @@ static void jz4780_usb_phy_init(struct usb_phy *phy)
>>      writel(reg, priv->base + REG_USBPCR_OFFSET);
>>  }
>>
>> -static void x1000_usb_phy_init(struct usb_phy *phy)
>> +static void x1000_usb_phy_init(struct phy *phy)
>>  {
>> -    struct jz4770_phy *priv = phy_to_jz4770_phy(phy);
>> +    struct ingenic_usb_phy *priv = phy_get_drvdata(phy);
>>      u32 reg;
>>
>>      reg = readl(priv->base + REG_USBPCR1_OFFSET) | 
>> USBPCR1_WORD_IF_16BIT;
>> @@ -235,9 +255,9 @@ static void x1000_usb_phy_init(struct usb_phy *phy)
>>      writel(reg, priv->base + REG_USBPCR_OFFSET);
>>  }
>>
>> -static void x1830_usb_phy_init(struct usb_phy *phy)
>> +static void x1830_usb_phy_init(struct phy *phy)
>>  {
>> -    struct jz4770_phy *priv = phy_to_jz4770_phy(phy);
>> +    struct ingenic_usb_phy *priv = phy_get_drvdata(phy);
>>      u32 reg;
>>
>>      /* rdt */
>> @@ -276,43 +296,25 @@ static const struct ingenic_soc_info 
>> x1830_soc_info = {
>>      .usb_phy_init = x1830_usb_phy_init,
>>  };
>>
>> -static const struct of_device_id ingenic_usb_phy_of_matches[] = {
>> -    { .compatible = "ingenic,jz4770-phy", .data = &jz4770_soc_info },
>> -    { .compatible = "ingenic,jz4780-phy", .data = &jz4780_soc_info },
>> -    { .compatible = "ingenic,x1000-phy", .data = &x1000_soc_info },
>> -    { .compatible = "ingenic,x1830-phy", .data = &x1830_soc_info },
>> -    { /* sentinel */ }
>> -};
>> -MODULE_DEVICE_TABLE(of, ingenic_usb_phy_of_matches);
>
> Why move that array?
>

This is the same as before, too entangled in keeping consistent with the 
order in other phy drivers :(

>> -
>> -static int jz4770_phy_probe(struct platform_device *pdev)
>> +static int ingenic_usb_phy_probe(struct platform_device *pdev)
>>  {
>> +    struct ingenic_usb_phy *priv;
>> +    struct phy_provider *provider;
>>      struct device *dev = &pdev->dev;
>> -    struct jz4770_phy *priv;
>>      int err;
>>
>>      priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
>>      if (!priv)
>>          return -ENOMEM;
>>
>> -    priv->soc_info = device_get_match_data(&pdev->dev);
>> +    priv->soc_info = device_get_match_data(dev);
>>      if (!priv->soc_info) {
>> -        dev_err(&pdev->dev, "Error: No device match found\n");
>> +        dev_err(dev, "Error: No device match found\n");
>>          return -ENODEV;
>>      }
>>
>>      platform_set_drvdata(pdev, priv);
>>      priv->dev = dev;
>> -    priv->phy.dev = dev;
>> -    priv->phy.otg = &priv->otg;
>> -    priv->phy.label = "ingenic-usb-phy";
>> -    priv->phy.init = ingenic_usb_phy_init;
>> -    priv->phy.shutdown = ingenic_usb_phy_shutdown;
>> -
>> -    priv->otg.state = OTG_STATE_UNDEFINED;
>> -    priv->otg.usb_phy = &priv->phy;
>> -    priv->otg.set_host = ingenic_usb_phy_set_host;
>> -    priv->otg.set_peripheral = ingenic_usb_phy_set_peripheral;
>>
>>      priv->base = devm_platform_ioremap_resource(pdev, 0);
>>      if (IS_ERR(priv->base)) {
>> @@ -336,27 +338,40 @@ static int jz4770_phy_probe(struct 
>> platform_device *pdev)
>>          return err;
>>      }
>>
>> -    err = usb_add_phy(&priv->phy, USB_PHY_TYPE_USB2);
>> -    if (err) {
>> -        if (err != -EPROBE_DEFER)
>> -            dev_err(dev, "Unable to register PHY\n");
>> -        return err;
>> -    }
>> +    priv->phy = devm_phy_create(priv->dev, NULL, &ingenic_usb_phy_ops);
>
> You can use 'dev' directly.
>

Sure.

>> +    if (IS_ERR(priv))
>> +        return PTR_ERR(priv);
>> +
>> +    phy_set_drvdata(priv->phy, priv);
>>
>> -    return devm_add_action_or_reset(dev, ingenic_usb_phy_remove, 
>> &priv->phy);
>> +    provider = devm_of_phy_provider_register(priv->dev, 
>> of_phy_simple_xlate);
>> +    if (IS_ERR(provider))
>> +        return PTR_ERR(provider);
>> +
>> +    return 0;
>
> return demv_of_phy_provider_register(dev, ...)
>

Sure.

>>  }
>>
>> -static struct platform_driver ingenic_phy_driver = {
>> -    .probe        = jz4770_phy_probe,
>> +static const struct of_device_id ingenic_usb_phy_of_matches[] = {
>> +    { .compatible = "ingenic,jz4770-phy", .data = &jz4770_soc_info },
>> +    { .compatible = "ingenic,jz4780-phy", .data = &jz4780_soc_info },
>> +    { .compatible = "ingenic,x1000-phy", .data = &x1000_soc_info },
>> +    { .compatible = "ingenic,x1830-phy", .data = &x1830_soc_info },
>> +    { /* sentinel */ }
>> +};
>> +MODULE_DEVICE_TABLE(of, ingenic_usb_phy_of_matches);
>> +
>> +static struct platform_driver ingenic_usb_phy_driver = {
>> +    .probe        = ingenic_usb_phy_probe,
>>      .driver        = {
>> -        .name    = "jz4770-phy",
>> +        .name    = "ingenic-usb-phy",
>>          .of_match_table = ingenic_usb_phy_of_matches,
>>      },
>>  };
>> -module_platform_driver(ingenic_phy_driver);
>> +module_platform_driver(ingenic_usb_phy_driver);
>>
>>  MODULE_AUTHOR("周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>");
>>  MODULE_AUTHOR("漆鹏振 (Qi Pengzhen) <aric.pzqi@ingenic.com>");
>>  MODULE_AUTHOR("Paul Cercueil <paul@crapouillou.net>");
>>  MODULE_DESCRIPTION("Ingenic SoCs USB PHY driver");
>> +MODULE_ALIAS("jz4770-phy");
>
> So I first thought this generic PHY driver would be a drop-in 
> replacement for the old jz4770-phy driver, that's why I suggested to 
> add the jz4770-phy alias. But it turns out that it's a completely 
> different framework, so we can drop the alias.
>
> That also means that this patch, without any change to the JZ4740 MUSB 
> driver, breaks USB on all Ingenic SoCs I can test with.
>
> So unless you have a patch to the jz4740-musb driver in this series, 
> you can't remove the old jz4770-phy driver yet. Just modify this patch 
> so that the new generic-PHY driver is added, without removing the old 
> one. It will be much easier to review (one new driver vs lots of +/- 
> lines) and you can move the code around if you want to. Then when the 
> jz4740-musb driver is modified to use the generic PHY framework, the 
> old jz4770-phy driver can be "retired".
>

Sure, this also just solves the problem of order and style that I 
entangled before.

Thanks and best regards!

> Cheers,
> -Paul
>
>>  MODULE_LICENSE("GPL");
>> diff --git a/drivers/usb/phy/Kconfig b/drivers/usb/phy/Kconfig
>> index ef4787cd3d37..ff24fca0a2d9 100644
>> --- a/drivers/usb/phy/Kconfig
>> +++ b/drivers/usb/phy/Kconfig
>> @@ -184,12 +184,4 @@ config USB_ULPI_VIEWPORT
>>        Provides read/write operations to the ULPI phy register set for
>>        controllers with a viewport register (e.g. Chipidea/ARC 
>> controllers).
>>
>> -config JZ4770_PHY
>> -    tristate "Ingenic SoCs Transceiver Driver"
>> -    depends on MIPS || COMPILE_TEST
>> -    select USB_PHY
>> -    help
>> -      This driver provides PHY support for the USB controller found
>> -      on the JZ-series and X-series SoCs from Ingenic.
>> -
>>  endmenu
>> diff --git a/drivers/usb/phy/Makefile b/drivers/usb/phy/Makefile
>> index b352bdbe8712..df1d99010079 100644
>> --- a/drivers/usb/phy/Makefile
>> +++ b/drivers/usb/phy/Makefile
>> @@ -24,4 +24,3 @@ obj-$(CONFIG_USB_MXS_PHY)        += phy-mxs-usb.o
>>  obj-$(CONFIG_USB_ULPI)            += phy-ulpi.o
>>  obj-$(CONFIG_USB_ULPI_VIEWPORT)        += phy-ulpi-viewport.o
>>  obj-$(CONFIG_KEYSTONE_USB_PHY)        += phy-keystone.o
>> -obj-$(CONFIG_JZ4770_PHY)        += phy-jz4770.o
>> -- 
>> 2.11.0
>>
>