[PATCH v2 00/11] Add USB2.0 support.

[PATCH v2 00/11] Add USB2.0 support.

[Biju Das]

This patch series aims to add USB PHY Control, USB2.0 Host and USB2.0 device
support for RZ/G2L SoC.

v1->v2
 * Updated usb phy control bindings with clock definitions
 * Updated generic ohci/ehci bindings to support RZ/G2L SoC
 * Incorporated vind's review comment on us phy control driver
 * Add support for USB2.0 device and OTG support.

v1:
 - https://patchwork.kernel.org/project/linux-renesas-soc/list/?series=498915

Biju Das (11):
  dt-bindings: phy: renesas: Document RZ/G2L USB PHY Control bindings
  drivers: clk: renesas: r9a07g044-cpg: Add USB clocks
  phy: renesas: Add RZ/G2L usb phy control driver
  arm64: configs: defconfig: Enable RZ/G2L USB PHY control driver
  dt-bindings: phy: renesas,usb2-phy: Document RZ/G2L phy bindings
  dt-bindings: usb: generic-ohci: Document RZ/G2L SoC bindings
  dt-bindings: usb: generic-ehci: Document RZ/G2L SoC bindings
  arm64: dts: renesas: r9a07g044: Add USB2.0 phy and host support
  dt-bindings: usb: renesas,usbhs: Document RZ/G2L bindings
  phy: renesas: phy-rcar-gen3-usb2: Add OTG support for RZ/G2L
  arm64: dts: renesas: r9a07g044: Add USB2.0 device support

 .../phy/renesas,rzg2l-usbphyctrl.yaml         |  65 ++++++++
 .../bindings/phy/renesas,usb2-phy.yaml        |  23 +--
 .../devicetree/bindings/usb/generic-ehci.yaml |  33 +++-
 .../devicetree/bindings/usb/generic-ohci.yaml |  32 +++-
 .../bindings/usb/renesas,usbhs.yaml           |  44 ++++-
 arch/arm64/boot/dts/renesas/r9a07g044.dtsi    | 119 +++++++++++++
 arch/arm64/configs/defconfig                  |   1 +
 drivers/clk/renesas/r9a07g044-cpg.c           |  12 ++
 drivers/phy/renesas/Kconfig                   |   7 +
 drivers/phy/renesas/Makefile                  |   1 +
 drivers/phy/renesas/phy-rcar-gen3-usb2.c      |  63 +++++--
 drivers/phy/renesas/phy-rzg2l-usbphyctrl.c    | 157 ++++++++++++++++++
 12 files changed, 522 insertions(+), 35 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/phy/renesas,rzg2l-usbphyctrl.yaml
 create mode 100644 drivers/phy/renesas/phy-rzg2l-usbphyctrl.c

-- 
2.17.1


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[PATCH v2 01/11] dt-bindings: phy: renesas: Document RZ/G2L USB PHY Control bindings

[Biju Das]

Add device tree binding document for RZ/G2L USB PHY control driver.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
V1->V2:
 * Add clock properties
---
 .../phy/renesas,rzg2l-usbphyctrl.yaml         | 65 +++++++++++++++++++
 1 file changed, 65 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/phy/renesas,rzg2l-usbphyctrl.yaml

diff --git a/Documentation/devicetree/bindings/phy/renesas,rzg2l-usbphyctrl.yaml b/Documentation/devicetree/bindings/phy/renesas,rzg2l-usbphyctrl.yaml
new file mode 100644
index 000000000000..8e8ba43f595d
--- /dev/null
+++ b/Documentation/devicetree/bindings/phy/renesas,rzg2l-usbphyctrl.yaml
@@ -0,0 +1,65 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/phy/renesas,rzg2l-usbphyctrl.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Renesas RZ/G2L USB2.0 PHY Control
+
+maintainers:
+  - Biju Das <biju.das.jz@bp.renesas.com>
+
+description:
+  The RZ/G2L USB2.0 PHY Control mainly controls reset and power down of the
+  USB/PHY.
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - renesas,r9a07g044-usbphyctrl # RZ/G2{L,LC}
+      - const: renesas,rzg2l-usbphyctrl
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+  power-domains:
+    maxItems: 1
+
+  '#phy-cells':
+    # see phy-bindings.txt in the same directory
+    const: 1
+    description: |
+      The phandle's argument in the PHY specifier is the phy reset control bit
+      of usb phy control.
+      0 = Port 1 Phy reset
+      1 = Port 2 Phy reset
+    enum: [ 0, 1 ]
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - '#phy-cells'
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/r9a07g044-cpg.h>
+
+    usbphyctrl@11c40000 {
+        compatible = "renesas,r9a07g044-usbphyctrl",
+                     "renesas,rzg2l-usbphyctrl";
+        reg = <0x11c40000 0x10000>;
+        clocks = <&cpg CPG_MOD R9A07G044_USB_PCLK>;
+        resets = <&cpg R9A07G044_USB_PCLK>;
+        power-domains = <&cpg>;
+        #phy-cells = <1>;
+    };
-- 
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[PATCH v2 03/11] phy: renesas: Add RZ/G2L usb phy control driver

[Biju Das]

Add support for RZ/G2L USB PHY Control driver.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
v1->v2:
 * Incorporated vinod's review comments.
---
 drivers/phy/renesas/Kconfig                |   7 +
 drivers/phy/renesas/Makefile               |   1 +
 drivers/phy/renesas/phy-rzg2l-usbphyctrl.c | 157 +++++++++++++++++++++
 3 files changed, 165 insertions(+)
 create mode 100644 drivers/phy/renesas/phy-rzg2l-usbphyctrl.c

diff --git a/drivers/phy/renesas/Kconfig b/drivers/phy/renesas/Kconfig
index 111bdcae775c..2184fba12255 100644
--- a/drivers/phy/renesas/Kconfig
+++ b/drivers/phy/renesas/Kconfig
@@ -32,3 +32,10 @@ config PHY_RCAR_GEN3_USB3
 	select GENERIC_PHY
 	help
 	  Support for USB 3.0 PHY found on Renesas R-Car generation 3 SoCs.
+
+config PHY_RZG2L_USBPHYCTRL
+	tristate "Renesas RZ/G2L USB PHY control driver"
+	depends on ARCH_RENESAS || COMPILE_TEST
+	select GENERIC_PHY
+	help
+	  Support for USB PHY Control found on RZ/G2L SoCs.
diff --git a/drivers/phy/renesas/Makefile b/drivers/phy/renesas/Makefile
index b599ff8a4349..62acc6bde5cb 100644
--- a/drivers/phy/renesas/Makefile
+++ b/drivers/phy/renesas/Makefile
@@ -3,3 +3,4 @@ obj-$(CONFIG_PHY_RCAR_GEN2)		+= phy-rcar-gen2.o
 obj-$(CONFIG_PHY_RCAR_GEN3_PCIE)	+= phy-rcar-gen3-pcie.o
 obj-$(CONFIG_PHY_RCAR_GEN3_USB2)	+= phy-rcar-gen3-usb2.o
 obj-$(CONFIG_PHY_RCAR_GEN3_USB3)	+= phy-rcar-gen3-usb3.o
+obj-$(CONFIG_PHY_RZG2L_USBPHYCTRL)	+= phy-rzg2l-usbphyctrl.o
diff --git a/drivers/phy/renesas/phy-rzg2l-usbphyctrl.c b/drivers/phy/renesas/phy-rzg2l-usbphyctrl.c
new file mode 100644
index 000000000000..f0e5555b99fe
--- /dev/null
+++ b/drivers/phy/renesas/phy-rzg2l-usbphyctrl.c
@@ -0,0 +1,157 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Renesas RZ/G2L USB PHY control driver
+ *
+ * Copyright (C) 2021 Renesas Electronics Corporation
+ */
+
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+
+#define RESET			0x000
+
+#define SEL_PLLRESET		BIT(12)
+#define PLL_RESET		BIT(8)
+
+#define PHY_RESET_PORT2		(BIT(1) | BIT(5))
+#define PHY_RESET_PORT1		(BIT(0) | BIT(4))
+
+#define NUM_PORTS		2
+
+struct rzg2l_usbphycontrol_drv;
+
+struct rzg2l_phyctrl {
+	struct phy *phy;
+	struct rzg2l_usbphycontrol_drv *drv;
+	u32 phy_reset_port_mask;
+};
+
+struct rzg2l_usbphycontrol_drv {
+	void __iomem *base;
+	struct rzg2l_phyctrl phyctrl[NUM_PORTS];
+};
+
+static int rzg2l_usbphyctrl_init(struct phy *p)
+{
+	struct rzg2l_phyctrl *r = phy_get_drvdata(p);
+	struct rzg2l_usbphycontrol_drv *drv = r->drv;
+	void __iomem *base = drv->base;
+	u32 val = readl(base + RESET);
+
+	val |= SEL_PLLRESET;
+	val &= ~(PLL_RESET | r->phy_reset_port_mask);
+	writel(val, base + RESET);
+
+	return 0;
+}
+
+static int rzg2l_usbphyctrl_exit(struct phy *p)
+{
+	struct rzg2l_phyctrl *r = phy_get_drvdata(p);
+	struct rzg2l_usbphycontrol_drv *drv = r->drv;
+	void __iomem *base = drv->base;
+	u32 val = readl(base + RESET);
+
+	val |= r->phy_reset_port_mask;
+	if ((val & 0xFF) == (PHY_RESET_PORT1 | PHY_RESET_PORT2))
+		val |= PLL_RESET;
+	writel(val, base + RESET);
+	return 0;
+}
+
+static const struct phy_ops rzg2l_usbphyctrl_ops = {
+	.init		= rzg2l_usbphyctrl_init,
+	.exit		= rzg2l_usbphyctrl_exit,
+	.owner		= THIS_MODULE,
+};
+
+static const struct of_device_id rzg2l_usbphyctrl_match_table[] = {
+	{ .compatible = "renesas,rzg2l-usbphyctrl" },
+	{ /* Sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, rzg2l_usbphyctrl_match_table);
+
+static struct phy *rzg2l_usbphycontrol_xlate(struct device *dev,
+					     struct of_phandle_args *args)
+{
+	struct rzg2l_usbphycontrol_drv *drv;
+	struct rzg2l_phyctrl *r;
+
+	drv = dev_get_drvdata(dev);
+	if (!drv)
+		return ERR_PTR(-EINVAL);
+
+	if (args->args[0] >= NUM_PORTS)
+		return ERR_PTR(-ENODEV);
+
+	r = &drv->phyctrl[args->args[0]];
+
+	return r->phy;
+}
+
+static int rzg2l_usbphycontrol_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct rzg2l_usbphycontrol_drv *drv;
+	struct phy_provider *provider;
+	u32 val;
+	int n;
+
+	drv = devm_kzalloc(dev, sizeof(*drv), GFP_KERNEL);
+	if (!drv)
+		return -ENOMEM;
+
+	drv->base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(drv->base))
+		return PTR_ERR(drv->base);
+
+	for (n = 0; n < NUM_PORTS; n++) {
+		struct rzg2l_phyctrl *phy = &drv->phyctrl[n];
+
+		phy->phy = devm_phy_create(dev, NULL, &rzg2l_usbphyctrl_ops);
+		if (IS_ERR(phy->phy)) {
+			dev_err(dev, "Failed to create USBPHY Control\n");
+			return PTR_ERR(phy->phy);
+		}
+
+		if (n == 0)
+			phy->phy_reset_port_mask = PHY_RESET_PORT1;
+		else
+			phy->phy_reset_port_mask = PHY_RESET_PORT2;
+
+		phy->drv = drv;
+		phy_set_drvdata(phy->phy, phy);
+	};
+
+	provider = devm_of_phy_provider_register(dev, rzg2l_usbphycontrol_xlate);
+	if (IS_ERR(provider)) {
+		dev_err(dev, "Failed to register PHY provider\n");
+		return PTR_ERR(provider);
+	}
+
+	dev_set_drvdata(dev, drv);
+
+	/* put pll and phy into reset state */
+	val = readl(drv->base + RESET);
+	val |= SEL_PLLRESET | PLL_RESET | PHY_RESET_PORT2 | PHY_RESET_PORT1;
+	writel(val, drv->base + RESET);
+
+	return 0;
+}
+
+static struct platform_driver rzg2l_usbphyctrl_driver = {
+	.driver = {
+		.name		= "rzg2l_usbphyctrl",
+		.of_match_table	= rzg2l_usbphyctrl_match_table,
+	},
+	.probe	= rzg2l_usbphycontrol_probe,
+};
+module_platform_driver(rzg2l_usbphyctrl_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Renesas RZ/G2L USBPHYControl");
+MODULE_AUTHOR("biju.das.jz@bp.renesas.com>");
-- 
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[PATCH v2 05/11] dt-bindings: phy: renesas, usb2-phy: Document RZ/G2L phy bindings

[Biju Das]

Document USB phy bindings for RZ/G2L SoC.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
 .../bindings/phy/renesas,usb2-phy.yaml        | 23 ++++++++++---------
 1 file changed, 12 insertions(+), 11 deletions(-)

diff --git a/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml b/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
index 0f358d5b84ef..eebba6c83aec 100644
--- a/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
+++ b/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
@@ -17,17 +17,18 @@ properties:
 
       - items:
           - enum:
-              - renesas,usb2-phy-r7s9210  # RZ/A2
-              - renesas,usb2-phy-r8a774a1 # RZ/G2M
-              - renesas,usb2-phy-r8a774b1 # RZ/G2N
-              - renesas,usb2-phy-r8a774c0 # RZ/G2E
-              - renesas,usb2-phy-r8a774e1 # RZ/G2H
-              - renesas,usb2-phy-r8a7795  # R-Car H3
-              - renesas,usb2-phy-r8a7796  # R-Car M3-W
-              - renesas,usb2-phy-r8a77961 # R-Car M3-W+
-              - renesas,usb2-phy-r8a77965 # R-Car M3-N
-              - renesas,usb2-phy-r8a77990 # R-Car E3
-              - renesas,usb2-phy-r8a77995 # R-Car D3
+              - renesas,usb2-phy-r7s9210   # RZ/A2
+              - renesas,usb2-phy-r8a774a1  # RZ/G2M
+              - renesas,usb2-phy-r8a774b1  # RZ/G2N
+              - renesas,usb2-phy-r8a774c0  # RZ/G2E
+              - renesas,usb2-phy-r8a774e1  # RZ/G2H
+              - renesas,usb2-phy-r8a7795   # R-Car H3
+              - renesas,usb2-phy-r8a7796   # R-Car M3-W
+              - renesas,usb2-phy-r8a77961  # R-Car M3-W+
+              - renesas,usb2-phy-r8a77965  # R-Car M3-N
+              - renesas,usb2-phy-r8a77990  # R-Car E3
+              - renesas,usb2-phy-r8a77995  # R-Car D3
+              - renesas,usb2-phy-r9a07g044 # RZ/G2{L,LC}
           - const: renesas,rcar-gen3-usb2-phy
 
   reg:
-- 
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[PATCH v2 10/11] phy: renesas: phy-rcar-gen3-usb2: Add OTG support for RZ/G2L

[Biju Das]

This patch adds OTG support for RZ/G2L SoC.

RZ/G2L USB2.0 phy is compatible with rcar gen3, but it uses
line ctrl register for OTG_ID pin changes. Apart from this
it uses a different OTG-BC interrupt bit for device recognition.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
 drivers/phy/renesas/phy-rcar-gen3-usb2.c | 63 ++++++++++++++++++------
 1 file changed, 48 insertions(+), 15 deletions(-)

diff --git a/drivers/phy/renesas/phy-rcar-gen3-usb2.c b/drivers/phy/renesas/phy-rcar-gen3-usb2.c
index fbc55232120e..aff0749be65d 100644
--- a/drivers/phy/renesas/phy-rcar-gen3-usb2.c
+++ b/drivers/phy/renesas/phy-rcar-gen3-usb2.c
@@ -22,6 +22,7 @@
 #include <linux/pm_runtime.h>
 #include <linux/regulator/consumer.h>
 #include <linux/string.h>
+#include <linux/sys_soc.h>
 #include <linux/usb/of.h>
 #include <linux/workqueue.h>
 
@@ -64,6 +65,7 @@
 /* VBCTRL */
 #define USB2_VBCTRL_OCCLREN		BIT(16)
 #define USB2_VBCTRL_DRVVBUSSEL		BIT(8)
+#define USB2_VBCTRL_VBOUT		BIT(0)
 
 /* LINECTRL1 */
 #define USB2_LINECTRL1_DPRPD_EN		BIT(19)
@@ -78,6 +80,10 @@
 #define USB2_ADPCTRL_IDPULLUP		BIT(5)	/* 1 = ID sampling is enabled */
 #define USB2_ADPCTRL_DRVVBUS		BIT(4)
 
+/*  RZ/G2L specific */
+#define USB2_OBINT_IDCHG_EN		BIT(0)
+#define USB2_LINECTRL1_USB2_IDMON	BIT(0)
+
 #define NUM_OF_PHYS			4
 enum rcar_gen3_phy_index {
 	PHY_INDEX_BOTH_HC,
@@ -112,9 +118,11 @@ struct rcar_gen3_chan {
 	struct mutex lock;	/* protects rphys[...].powered */
 	enum usb_dr_mode dr_mode;
 	int irq;
+	u32 obint_enable_bits;
 	bool extcon_host;
 	bool is_otg_channel;
 	bool uses_otg_pins;
+	bool soc_no_adp_ctrl;
 };
 
 /*
@@ -172,14 +180,22 @@ static void rcar_gen3_set_linectrl(struct rcar_gen3_chan *ch, int dp, int dm)
 static void rcar_gen3_enable_vbus_ctrl(struct rcar_gen3_chan *ch, int vbus)
 {
 	void __iomem *usb2_base = ch->base;
-	u32 val = readl(usb2_base + USB2_ADPCTRL);
+	u32 vbus_ctrl_reg = USB2_ADPCTRL;
+	u32 vbus_ctrl_val = USB2_ADPCTRL_DRVVBUS;
+	u32 val;
 
 	dev_vdbg(ch->dev, "%s: %08x, %d\n", __func__, val, vbus);
+	if (ch->soc_no_adp_ctrl) {
+		vbus_ctrl_reg = USB2_VBCTRL;
+		vbus_ctrl_val = USB2_VBCTRL_VBOUT;
+	}
+
+	val = readl(usb2_base + vbus_ctrl_reg);
 	if (vbus)
-		val |= USB2_ADPCTRL_DRVVBUS;
+		val |= vbus_ctrl_val;
 	else
-		val &= ~USB2_ADPCTRL_DRVVBUS;
-	writel(val, usb2_base + USB2_ADPCTRL);
+		val &= ~vbus_ctrl_val;
+	writel(val, usb2_base + vbus_ctrl_reg);
 }
 
 static void rcar_gen3_control_otg_irq(struct rcar_gen3_chan *ch, int enable)
@@ -188,9 +204,9 @@ static void rcar_gen3_control_otg_irq(struct rcar_gen3_chan *ch, int enable)
 	u32 val = readl(usb2_base + USB2_OBINTEN);
 
 	if (ch->uses_otg_pins && enable)
-		val |= USB2_OBINT_BITS;
+		val |= ch->obint_enable_bits;
 	else
-		val &= ~USB2_OBINT_BITS;
+		val &= ~ch->obint_enable_bits;
 	writel(val, usb2_base + USB2_OBINTEN);
 }
 
@@ -252,6 +268,9 @@ static bool rcar_gen3_check_id(struct rcar_gen3_chan *ch)
 	if (!ch->uses_otg_pins)
 		return (ch->dr_mode == USB_DR_MODE_HOST) ? false : true;
 
+	if (ch->soc_no_adp_ctrl)
+		return !!(readl(ch->base + USB2_LINECTRL1) & USB2_LINECTRL1_USB2_IDMON);
+
 	return !!(readl(ch->base + USB2_ADPCTRL) & USB2_ADPCTRL_IDDIG);
 }
 
@@ -376,16 +395,17 @@ static void rcar_gen3_init_otg(struct rcar_gen3_chan *ch)
 	      USB2_LINECTRL1_DMRPD_EN | USB2_LINECTRL1_DM_RPD;
 	writel(val, usb2_base + USB2_LINECTRL1);
 
-	val = readl(usb2_base + USB2_VBCTRL);
-	val &= ~USB2_VBCTRL_OCCLREN;
-	writel(val | USB2_VBCTRL_DRVVBUSSEL, usb2_base + USB2_VBCTRL);
-	val = readl(usb2_base + USB2_ADPCTRL);
-	writel(val | USB2_ADPCTRL_IDPULLUP, usb2_base + USB2_ADPCTRL);
-
+	if (!ch->soc_no_adp_ctrl) {
+		val = readl(usb2_base + USB2_VBCTRL);
+		val &= ~USB2_VBCTRL_OCCLREN;
+		writel(val | USB2_VBCTRL_DRVVBUSSEL, usb2_base + USB2_VBCTRL);
+		val = readl(usb2_base + USB2_ADPCTRL);
+		writel(val | USB2_ADPCTRL_IDPULLUP, usb2_base + USB2_ADPCTRL);
+	}
 	msleep(20);
 
 	writel(0xffffffff, usb2_base + USB2_OBINTSTA);
-	writel(USB2_OBINT_BITS, usb2_base + USB2_OBINTEN);
+	writel(ch->obint_enable_bits, usb2_base + USB2_OBINTEN);
 
 	rcar_gen3_device_recognition(ch);
 }
@@ -397,9 +417,9 @@ static irqreturn_t rcar_gen3_phy_usb2_irq(int irq, void *_ch)
 	u32 status = readl(usb2_base + USB2_OBINTSTA);
 	irqreturn_t ret = IRQ_NONE;
 
-	if (status & USB2_OBINT_BITS) {
+	if (status & ch->obint_enable_bits) {
 		dev_vdbg(ch->dev, "%s: %08x\n", __func__, status);
-		writel(USB2_OBINT_BITS, usb2_base + USB2_OBINTSTA);
+		writel(ch->obint_enable_bits, usb2_base + USB2_OBINTSTA);
 		rcar_gen3_device_recognition(ch);
 		ret = IRQ_HANDLED;
 	}
@@ -535,6 +555,11 @@ static const struct phy_ops rz_g1c_phy_usb2_ops = {
 	.owner		= THIS_MODULE,
 };
 
+static const struct soc_device_attribute soc_no_adp_ctrl[] = {
+	{ .soc_id = "r9a07g044", .data = (void *)true },
+	{ /* Sentinel */ }
+};
+
 static const struct of_device_id rcar_gen3_phy_usb2_match_table[] = {
 	{
 		.compatible = "renesas,usb2-phy-r8a77470",
@@ -613,6 +638,7 @@ static int rcar_gen3_phy_usb2_probe(struct platform_device *pdev)
 	struct phy_provider *provider;
 	const struct phy_ops *phy_usb2_ops;
 	int ret = 0, i;
+	const struct soc_device_attribute *attr;
 
 	if (!dev->of_node) {
 		dev_err(dev, "This driver needs device tree\n");
@@ -627,6 +653,7 @@ static int rcar_gen3_phy_usb2_probe(struct platform_device *pdev)
 	if (IS_ERR(channel->base))
 		return PTR_ERR(channel->base);
 
+	channel->obint_enable_bits = USB2_OBINT_SESSVLDCHG | USB2_OBINT_IDDIGCHG;
 	/* get irq number here and request_irq for OTG in phy_init */
 	channel->irq = platform_get_irq_optional(pdev, 0);
 	channel->dr_mode = rcar_gen3_get_dr_mode(dev->of_node);
@@ -634,6 +661,12 @@ static int rcar_gen3_phy_usb2_probe(struct platform_device *pdev)
 		int ret;
 
 		channel->is_otg_channel = true;
+		attr = soc_device_match(soc_no_adp_ctrl);
+		if (attr) {
+			channel->soc_no_adp_ctrl = attr->data;
+			channel->obint_enable_bits = USB2_OBINT_IDCHG_EN;
+		}
+
 		channel->uses_otg_pins = !of_property_read_bool(dev->of_node,
 							"renesas,no-otg-pins");
 		channel->extcon = devm_extcon_dev_allocate(dev,
-- 
2.17.1


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Re: [PATCH v2 01/11] dt-bindings: phy: renesas: Document RZ/G2L USB PHY Control bindings

[Rob Herring]

On Mon, 21 Jun 2021 10:39:33 +0100, Biju Das wrote:
> Add device tree binding document for RZ/G2L USB PHY control driver.
> 
> Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
> Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> ---
> V1->V2:
>  * Add clock properties
> ---
>  .../phy/renesas,rzg2l-usbphyctrl.yaml         | 65 +++++++++++++++++++
>  1 file changed, 65 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/phy/renesas,rzg2l-usbphyctrl.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:
Documentation/devicetree/bindings/phy/renesas,rzg2l-usbphyctrl.example.dts:19:18: fatal error: dt-bindings/clock/r9a07g044-cpg.h: No such file or directory
   19 |         #include <dt-bindings/clock/r9a07g044-cpg.h>
      |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
make[1]: *** [scripts/Makefile.lib:380: Documentation/devicetree/bindings/phy/renesas,rzg2l-usbphyctrl.example.dt.yaml] Error 1
make[1]: *** Waiting for unfinished jobs....
make: *** [Makefile:1416: dt_binding_check] Error 2
\ndoc reference errors (make refcheckdocs):

See https://patchwork.ozlabs.org/patch/1494979

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.


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Re: [PATCH v2 10/11] phy: renesas: phy-rcar-gen3-usb2: Add OTG support for RZ/G2L

[Geert Uytterhoeven]

Hi Biju,

Thanks for your patch!

On Mon, Jun 21, 2021 at 11:40 AM Biju Das <biju.das.jz@bp.renesas.com> wrote:
> This patch adds OTG support for RZ/G2L SoC.
>
> RZ/G2L USB2.0 phy is compatible with rcar gen3, but it uses
> line ctrl register for OTG_ID pin changes. Apart from this
> it uses a different OTG-BC interrupt bit for device recognition.

So it is not compatible? ;-)

> --- a/drivers/phy/renesas/phy-rcar-gen3-usb2.c
> +++ b/drivers/phy/renesas/phy-rcar-gen3-usb2.c
> @@ -535,6 +555,11 @@ static const struct phy_ops rz_g1c_phy_usb2_ops = {
>         .owner          = THIS_MODULE,
>  };
>
> +static const struct soc_device_attribute soc_no_adp_ctrl[] = {
> +       { .soc_id = "r9a07g044", .data = (void *)true },
> +       { /* Sentinel */ }
> +};
> +
>  static const struct of_device_id rcar_gen3_phy_usb2_match_table[] = {
>         {
>                 .compatible = "renesas,usb2-phy-r8a77470",
> @@ -613,6 +638,7 @@ static int rcar_gen3_phy_usb2_probe(struct platform_device *pdev)
>         struct phy_provider *provider;
>         const struct phy_ops *phy_usb2_ops;
>         int ret = 0, i;
> +       const struct soc_device_attribute *attr;
>
>         if (!dev->of_node) {
>                 dev_err(dev, "This driver needs device tree\n");
> @@ -627,6 +653,7 @@ static int rcar_gen3_phy_usb2_probe(struct platform_device *pdev)
>         if (IS_ERR(channel->base))
>                 return PTR_ERR(channel->base);
>
> +       channel->obint_enable_bits = USB2_OBINT_SESSVLDCHG | USB2_OBINT_IDDIGCHG;
>         /* get irq number here and request_irq for OTG in phy_init */
>         channel->irq = platform_get_irq_optional(pdev, 0);
>         channel->dr_mode = rcar_gen3_get_dr_mode(dev->of_node);
> @@ -634,6 +661,12 @@ static int rcar_gen3_phy_usb2_probe(struct platform_device *pdev)
>                 int ret;
>
>                 channel->is_otg_channel = true;
> +               attr = soc_device_match(soc_no_adp_ctrl);
> +               if (attr) {
> +                       channel->soc_no_adp_ctrl = attr->data;
> +                       channel->obint_enable_bits = USB2_OBINT_IDCHG_EN;
> +               }

Please don't abuse soc_device_match() for matching with a different
variant that uses a different compatible value.  Just add an entry
to rcar_gen3_phy_usb2_match_table[] instead.
I don't know if you can handle RZ/G2L just using a different phy_ops,
or need to extend rcar_gen3_phy_usb2_match_table[].data.

> +
>                 channel->uses_otg_pins = !of_property_read_bool(dev->of_node,
>                                                         "renesas,no-otg-pins");
>                 channel->extcon = devm_extcon_dev_allocate(dev,

Gr{oetje,eeting}s,

                        Geert

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Re: [PATCH v2 05/11] dt-bindings: phy: renesas,usb2-phy: Document RZ/G2L phy bindings

[Geert Uytterhoeven]

Hi Biju,

On Mon, Jun 21, 2021 at 11:40 AM Biju Das <biju.das.jz@bp.renesas.com> wrote:
> Document USB phy bindings for RZ/G2L SoC.
>
> Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
> Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> ---
>  .../bindings/phy/renesas,usb2-phy.yaml        | 23 ++++++++++---------
>  1 file changed, 12 insertions(+), 11 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml b/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
> index 0f358d5b84ef..eebba6c83aec 100644
> --- a/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
> +++ b/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
> @@ -17,17 +17,18 @@ properties:
>
>        - items:
>            - enum:
> -              - renesas,usb2-phy-r7s9210  # RZ/A2
> -              - renesas,usb2-phy-r8a774a1 # RZ/G2M
> -              - renesas,usb2-phy-r8a774b1 # RZ/G2N
> -              - renesas,usb2-phy-r8a774c0 # RZ/G2E
> -              - renesas,usb2-phy-r8a774e1 # RZ/G2H
> -              - renesas,usb2-phy-r8a7795  # R-Car H3
> -              - renesas,usb2-phy-r8a7796  # R-Car M3-W
> -              - renesas,usb2-phy-r8a77961 # R-Car M3-W+
> -              - renesas,usb2-phy-r8a77965 # R-Car M3-N
> -              - renesas,usb2-phy-r8a77990 # R-Car E3
> -              - renesas,usb2-phy-r8a77995 # R-Car D3
> +              - renesas,usb2-phy-r7s9210   # RZ/A2
> +              - renesas,usb2-phy-r8a774a1  # RZ/G2M
> +              - renesas,usb2-phy-r8a774b1  # RZ/G2N
> +              - renesas,usb2-phy-r8a774c0  # RZ/G2E
> +              - renesas,usb2-phy-r8a774e1  # RZ/G2H
> +              - renesas,usb2-phy-r8a7795   # R-Car H3
> +              - renesas,usb2-phy-r8a7796   # R-Car M3-W
> +              - renesas,usb2-phy-r8a77961  # R-Car M3-W+
> +              - renesas,usb2-phy-r8a77965  # R-Car M3-N
> +              - renesas,usb2-phy-r8a77990  # R-Car E3
> +              - renesas,usb2-phy-r8a77995  # R-Car D3
> +              - renesas,usb2-phy-r9a07g044 # RZ/G2{L,LC}
>            - const: renesas,rcar-gen3-usb2-phy
>
>    reg:

As some of the register bits are different, cfr. my comments to
[PATCH v2 10/11], I think you want to add a new oneOf instead:

      - items:
          - enum:
              - renesas,usb2-phy-r9a07g044 # RZ/G2{L,LC}
          - const: renesas,rzg2l-usb2-phy


Gr{oetje,eeting}s,

                        Geert


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Re: [PATCH v2 01/11] dt-bindings: phy: renesas: Document RZ/G2L USB PHY Control bindings

[Rob Herring]

On Mon, Jun 21, 2021 at 10:39:33AM +0100, Biju Das wrote:
> Add device tree binding document for RZ/G2L USB PHY control driver.
> 
> Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
> Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> ---
> V1->V2:
>  * Add clock properties
> ---
>  .../phy/renesas,rzg2l-usbphyctrl.yaml         | 65 +++++++++++++++++++
>  1 file changed, 65 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/phy/renesas,rzg2l-usbphyctrl.yaml
> 
> diff --git a/Documentation/devicetree/bindings/phy/renesas,rzg2l-usbphyctrl.yaml b/Documentation/devicetree/bindings/phy/renesas,rzg2l-usbphyctrl.yaml
> new file mode 100644
> index 000000000000..8e8ba43f595d
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/phy/renesas,rzg2l-usbphyctrl.yaml
> @@ -0,0 +1,65 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/phy/renesas,rzg2l-usbphyctrl.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Renesas RZ/G2L USB2.0 PHY Control
> +
> +maintainers:
> +  - Biju Das <biju.das.jz@bp.renesas.com>
> +
> +description:
> +  The RZ/G2L USB2.0 PHY Control mainly controls reset and power down of the
> +  USB/PHY.
> +
> +properties:
> +  compatible:
> +    items:
> +      - enum:
> +          - renesas,r9a07g044-usbphyctrl # RZ/G2{L,LC}
> +      - const: renesas,rzg2l-usbphyctrl
> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 1
> +
> +  resets:
> +    maxItems: 1
> +
> +  power-domains:
> +    maxItems: 1
> +
> +  '#phy-cells':
> +    # see phy-bindings.txt in the same directory
> +    const: 1
> +    description: |
> +      The phandle's argument in the PHY specifier is the phy reset control bit
> +      of usb phy control.
> +      0 = Port 1 Phy reset
> +      1 = Port 2 Phy reset
> +    enum: [ 0, 1 ]

You already have the const, so this doesn't do anything.

> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - '#phy-cells'
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/r9a07g044-cpg.h>
> +
> +    usbphyctrl@11c40000 {

usb-phy@...

> +        compatible = "renesas,r9a07g044-usbphyctrl",
> +                     "renesas,rzg2l-usbphyctrl";
> +        reg = <0x11c40000 0x10000>;
> +        clocks = <&cpg CPG_MOD R9A07G044_USB_PCLK>;
> +        resets = <&cpg R9A07G044_USB_PCLK>;
> +        power-domains = <&cpg>;
> +        #phy-cells = <1>;
> +    };
> -- 
> 2.17.1
> 
> 

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RE: [PATCH v2 10/11] phy: renesas: phy-rcar-gen3-usb2: Add OTG support for RZ/G2L

[Yoshihiro Shimoda]

Hi Biju-san, Geert-san,

> From: Geert Uytterhoeven, Sent: Wednesday, June 23, 2021 12:29 AM
> 
> Hi Biju,
> 
> Thanks for your patch!
> 
> On Mon, Jun 21, 2021 at 11:40 AM Biju Das wrote:
> > This patch adds OTG support for RZ/G2L SoC.
> >
> > RZ/G2L USB2.0 phy is compatible with rcar gen3, but it uses
> > line ctrl register for OTG_ID pin changes. Apart from this
> > it uses a different OTG-BC interrupt bit for device recognition.
> 
> So it is not compatible? ;-)
> 
> > --- a/drivers/phy/renesas/phy-rcar-gen3-usb2.c
> > +++ b/drivers/phy/renesas/phy-rcar-gen3-usb2.c
> > @@ -535,6 +555,11 @@ static const struct phy_ops rz_g1c_phy_usb2_ops = {
> >         .owner          = THIS_MODULE,
> >  };
> >
> > +static const struct soc_device_attribute soc_no_adp_ctrl[] = {
> > +       { .soc_id = "r9a07g044", .data = (void *)true },
> > +       { /* Sentinel */ }
> > +};
> > +
> >  static const struct of_device_id rcar_gen3_phy_usb2_match_table[] = {
> >         {
> >                 .compatible = "renesas,usb2-phy-r8a77470",
> > @@ -613,6 +638,7 @@ static int rcar_gen3_phy_usb2_probe(struct platform_device *pdev)
> >         struct phy_provider *provider;
> >         const struct phy_ops *phy_usb2_ops;
> >         int ret = 0, i;
> > +       const struct soc_device_attribute *attr;
> >
> >         if (!dev->of_node) {
> >                 dev_err(dev, "This driver needs device tree\n");
> > @@ -627,6 +653,7 @@ static int rcar_gen3_phy_usb2_probe(struct platform_device *pdev)
> >         if (IS_ERR(channel->base))
> >                 return PTR_ERR(channel->base);
> >
> > +       channel->obint_enable_bits = USB2_OBINT_SESSVLDCHG | USB2_OBINT_IDDIGCHG;
> >         /* get irq number here and request_irq for OTG in phy_init */
> >         channel->irq = platform_get_irq_optional(pdev, 0);
> >         channel->dr_mode = rcar_gen3_get_dr_mode(dev->of_node);
> > @@ -634,6 +661,12 @@ static int rcar_gen3_phy_usb2_probe(struct platform_device *pdev)
> >                 int ret;
> >
> >                 channel->is_otg_channel = true;
> > +               attr = soc_device_match(soc_no_adp_ctrl);
> > +               if (attr) {
> > +                       channel->soc_no_adp_ctrl = attr->data;
> > +                       channel->obint_enable_bits = USB2_OBINT_IDCHG_EN;
> > +               }
> 
> Please don't abuse soc_device_match() for matching with a different
> variant that uses a different compatible value.  Just add an entry
> to rcar_gen3_phy_usb2_match_table[] instead.
> I don't know if you can handle RZ/G2L just using a different phy_ops,
> or need to extend rcar_gen3_phy_usb2_match_table[].data.

Thank you for your comments. I think we need to extend
rcar_gen3_phy_usb2_match_table[].data because we cannot add
any private data into phy_ops.

I'll send further comments for this patch on other email thread.

Best regards,
Yoshihiro Shimoda

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RE: [PATCH v2 10/11] phy: renesas: phy-rcar-gen3-usb2: Add OTG support for RZ/G2L

[Yoshihiro Shimoda]

Hi Biju-san,

Thank you for the patch!

> From: Biju Das, Sent: Monday, June 21, 2021 6:40 PM
> 
> This patch adds OTG support for RZ/G2L SoC.
> 
> RZ/G2L USB2.0 phy is compatible with rcar gen3, but it uses
> line ctrl register for OTG_ID pin changes. Apart from this
> it uses a different OTG-BC interrupt bit for device recognition.
> 
> Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
> Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> ---
>  drivers/phy/renesas/phy-rcar-gen3-usb2.c | 63 ++++++++++++++++++------
>  1 file changed, 48 insertions(+), 15 deletions(-)
> 
> diff --git a/drivers/phy/renesas/phy-rcar-gen3-usb2.c b/drivers/phy/renesas/phy-rcar-gen3-usb2.c
> index fbc55232120e..aff0749be65d 100644
> --- a/drivers/phy/renesas/phy-rcar-gen3-usb2.c
> +++ b/drivers/phy/renesas/phy-rcar-gen3-usb2.c
<snip>
> @@ -627,6 +653,7 @@ static int rcar_gen3_phy_usb2_probe(struct platform_device *pdev)
>  	if (IS_ERR(channel->base))
>  		return PTR_ERR(channel->base);
> 
> +	channel->obint_enable_bits = USB2_OBINT_SESSVLDCHG | USB2_OBINT_IDDIGCHG;

Please use USB2_OBINT_BITS instead of USB2_OBINT_SESSVLDCHG | USB2_OBINT_IDDIGCHG.

Sorry, I thought we needed more update when I sent an email before,
but I have this comment only now.

Best regards,
Yoshihiro Shimoda


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RE: [PATCH v2 10/11] phy: renesas: phy-rcar-gen3-usb2: Add OTG support for RZ/G2L

[Biju Das]

Hi Geert,

Thanks for the feedback.

> Subject: Re: [PATCH v2 10/11] phy: renesas: phy-rcar-gen3-usb2: Add OTG
> support for RZ/G2L
> 
> Hi Biju,
> 
> Thanks for your patch!
> 
> On Mon, Jun 21, 2021 at 11:40 AM Biju Das <biju.das.jz@bp.renesas.com>
> wrote:
> > This patch adds OTG support for RZ/G2L SoC.
> >
> > RZ/G2L USB2.0 phy is compatible with rcar gen3, but it uses line ctrl
> > register for OTG_ID pin changes. Apart from this it uses a different
> > OTG-BC interrupt bit for device recognition.
> 
> So it is not compatible? ;-)

OK. Basically I meant we need some modification in driver to support this SoC.

> 
> > --- a/drivers/phy/renesas/phy-rcar-gen3-usb2.c
> > +++ b/drivers/phy/renesas/phy-rcar-gen3-usb2.c
> > @@ -535,6 +555,11 @@ static const struct phy_ops rz_g1c_phy_usb2_ops = {
> >         .owner          = THIS_MODULE,
> >  };
> >
> > +static const struct soc_device_attribute soc_no_adp_ctrl[] = {
> > +       { .soc_id = "r9a07g044", .data = (void *)true },
> > +       { /* Sentinel */ }
> > +};
> > +
> >  static const struct of_device_id rcar_gen3_phy_usb2_match_table[] = {
> >         {
> >                 .compatible = "renesas,usb2-phy-r8a77470", @@ -613,6
> > +638,7 @@ static int rcar_gen3_phy_usb2_probe(struct platform_device
> *pdev)
> >         struct phy_provider *provider;
> >         const struct phy_ops *phy_usb2_ops;
> >         int ret = 0, i;
> > +       const struct soc_device_attribute *attr;
> >
> >         if (!dev->of_node) {
> >                 dev_err(dev, "This driver needs device tree\n"); @@
> > -627,6 +653,7 @@ static int rcar_gen3_phy_usb2_probe(struct
> platform_device *pdev)
> >         if (IS_ERR(channel->base))
> >                 return PTR_ERR(channel->base);
> >
> > +       channel->obint_enable_bits = USB2_OBINT_SESSVLDCHG |
> > + USB2_OBINT_IDDIGCHG;
> >         /* get irq number here and request_irq for OTG in phy_init */
> >         channel->irq = platform_get_irq_optional(pdev, 0);
> >         channel->dr_mode = rcar_gen3_get_dr_mode(dev->of_node);
> > @@ -634,6 +661,12 @@ static int rcar_gen3_phy_usb2_probe(struct
> platform_device *pdev)
> >                 int ret;
> >
> >                 channel->is_otg_channel = true;
> > +               attr = soc_device_match(soc_no_adp_ctrl);
> > +               if (attr) {
> > +                       channel->soc_no_adp_ctrl = attr->data;
> > +                       channel->obint_enable_bits =
> USB2_OBINT_IDCHG_EN;
> > +               }
> 
> Please don't abuse soc_device_match() for matching with a different
> variant that uses a different compatible value.  Just add an entry to
> rcar_gen3_phy_usb2_match_table[] instead.


OK.
> I don't know if you can handle RZ/G2L just using a different phy_ops, or
> need to extend rcar_gen3_phy_usb2_match_table[].data.

Will try to extend rcar_gen3_phy_usb2_match_table[].data as Shimoda-san suggested.

Regards,
Biju


> 
> > +
> >                 channel->uses_otg_pins = !of_property_read_bool(dev-
> >of_node,
> >                                                         "renesas,no-otg-
> pins");
> >                 channel->extcon = devm_extcon_dev_allocate(dev,
> 
> Gr{oetje,eeting}s,
> 
>                         Geert
> 
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-
> m68k.org
> 
> In personal conversations with technical people, I call myself a hacker.
> But when I'm talking to journalists I just say "programmer" or something
> like that.
>                                 -- Linus Torvalds
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RE: [PATCH v2 10/11] phy: renesas: phy-rcar-gen3-usb2: Add OTG support for RZ/G2L

[Biju Das]

Hi Shimoda-San,

Thanks for the feedback.

> Subject: RE: [PATCH v2 10/11] phy: renesas: phy-rcar-gen3-usb2: Add OTG
> support for RZ/G2L
> 
> Hi Biju-san,
> 
> Thank you for the patch!
> 
> > From: Biju Das, Sent: Monday, June 21, 2021 6:40 PM
> >
> > This patch adds OTG support for RZ/G2L SoC.
> >
> > RZ/G2L USB2.0 phy is compatible with rcar gen3, but it uses line ctrl
> > register for OTG_ID pin changes. Apart from this it uses a different
> > OTG-BC interrupt bit for device recognition.
> >
> > Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
> > Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> > ---
> >  drivers/phy/renesas/phy-rcar-gen3-usb2.c | 63
> > ++++++++++++++++++------
> >  1 file changed, 48 insertions(+), 15 deletions(-)
> >
> > diff --git a/drivers/phy/renesas/phy-rcar-gen3-usb2.c
> > b/drivers/phy/renesas/phy-rcar-gen3-usb2.c
> > index fbc55232120e..aff0749be65d 100644
> > --- a/drivers/phy/renesas/phy-rcar-gen3-usb2.c
> > +++ b/drivers/phy/renesas/phy-rcar-gen3-usb2.c
> <snip>
> > @@ -627,6 +653,7 @@ static int rcar_gen3_phy_usb2_probe(struct
> platform_device *pdev)
> >  	if (IS_ERR(channel->base))
> >  		return PTR_ERR(channel->base);
> >
> > +	channel->obint_enable_bits = USB2_OBINT_SESSVLDCHG |
> > +USB2_OBINT_IDDIGCHG;
> 
> Please use USB2_OBINT_BITS instead of USB2_OBINT_SESSVLDCHG |
> USB2_OBINT_IDDIGCHG.

OK.  Will use USB2_OBINT_BITS.

Regards,
Biju

> Sorry, I thought we needed more update when I sent an email before, but I
> have this comment only now.
> 
> Best regards,
> Yoshihiro Shimoda


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RE: [PATCH v2 01/11] dt-bindings: phy: renesas: Document RZ/G2L USB PHY Control bindings

[Biju Das]

Hi Rob,

Thanks for the feedback.

> Subject: Re: [PATCH v2 01/11] dt-bindings: phy: renesas: Document RZ/G2L
> USB PHY Control bindings
> 
> On Mon, Jun 21, 2021 at 10:39:33AM +0100, Biju Das wrote:
> > Add device tree binding document for RZ/G2L USB PHY control driver.
> >
> > Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
> > Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> > ---
> > V1->V2:
> >  * Add clock properties
> > ---
> >  .../phy/renesas,rzg2l-usbphyctrl.yaml         | 65 +++++++++++++++++++
> >  1 file changed, 65 insertions(+)
> >  create mode 100644
> > Documentation/devicetree/bindings/phy/renesas,rzg2l-usbphyctrl.yaml
> >
> > diff --git
> > a/Documentation/devicetree/bindings/phy/renesas,rzg2l-usbphyctrl.yaml
> > b/Documentation/devicetree/bindings/phy/renesas,rzg2l-usbphyctrl.yaml
> > new file mode 100644
> > index 000000000000..8e8ba43f595d
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/phy/renesas,rzg2l-usbphyctrl.y
> > +++ aml
> > @@ -0,0 +1,65 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) %YAML 1.2
> > +---
> > +$id:
> > +https://jpn01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdevi
> > +cetree.org%2Fschemas%2Fphy%2Frenesas%2Crzg2l-usbphyctrl.yaml%23&amp;d
> > +ata=04%7C01%7Cbiju.das.jz%40bp.renesas.com%7Cc6bbf5f6ce334eaa722a08d9
> > +359f07ad%7C53d82571da1947e49cb4625a166a4a2a%7C0%7C0%7C637599779421910
> > +039%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBT
> > +iI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=Jcf6Om4DehifCe1KO1rmt5LxTB
> > +6jtGoQLD1MoqWGM%2F0%3D&amp;reserved=0
> > +$schema:
> > +https://jpn01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdevi
> > +cetree.org%2Fmeta-schemas%2Fcore.yaml%23&amp;data=04%7C01%7Cbiju.das.
> > +jz%40bp.renesas.com%7Cc6bbf5f6ce334eaa722a08d9359f07ad%7C53d82571da19
> > +47e49cb4625a166a4a2a%7C0%7C0%7C637599779421910039%7CUnknown%7CTWFpbGZ
> > +sb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%
> > +3D%7C1000&amp;sdata=LlqPRLf9%2BGrEdSapxCFhwxVKcXTVh9ECr%2FXPN0SIzi4%3
> > +D&amp;reserved=0
> > +
> > +title: Renesas RZ/G2L USB2.0 PHY Control
> > +
> > +maintainers:
> > +  - Biju Das <biju.das.jz@bp.renesas.com>
> > +
> > +description:
> > +  The RZ/G2L USB2.0 PHY Control mainly controls reset and power down
> > +of the
> > +  USB/PHY.
> > +
> > +properties:
> > +  compatible:
> > +    items:
> > +      - enum:
> > +          - renesas,r9a07g044-usbphyctrl # RZ/G2{L,LC}
> > +      - const: renesas,rzg2l-usbphyctrl
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  clocks:
> > +    maxItems: 1
> > +
> > +  resets:
> > +    maxItems: 1
> > +
> > +  power-domains:
> > +    maxItems: 1
> > +
> > +  '#phy-cells':
> > +    # see phy-bindings.txt in the same directory
> > +    const: 1
> > +    description: |
> > +      The phandle's argument in the PHY specifier is the phy reset
> control bit
> > +      of usb phy control.
> > +      0 = Port 1 Phy reset
> > +      1 = Port 2 Phy reset
> > +    enum: [ 0, 1 ]
> 
> You already have the const, so this doesn't do anything.

OK, will take out const.

> 
> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +  - clocks
> > +  - '#phy-cells'
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > +  - |
> > +    #include <dt-bindings/clock/r9a07g044-cpg.h>
> > +
> > +    usbphyctrl@11c40000 {
> 
> usb-phy@...

The IP is called USBPHY control. It mainly controls reset and power down of the USB2.0/PHY.

So not sure usb-phy is right one here ? I prefer usb-phy-ctrl instead. Is it ok? Please let me know.

Cheers,
Biju


> > +        compatible = "renesas,r9a07g044-usbphyctrl",
> > +                     "renesas,rzg2l-usbphyctrl";
> > +        reg = <0x11c40000 0x10000>;
> > +        clocks = <&cpg CPG_MOD R9A07G044_USB_PCLK>;
> > +        resets = <&cpg R9A07G044_USB_PCLK>;
> > +        power-domains = <&cpg>;
> > +        #phy-cells = <1>;
> > +    };
> > --
> > 2.17.1
> >
> >

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Re: [PATCH v2 01/11] dt-bindings: phy: renesas: Document RZ/G2L USB PHY Control bindings

[Rob Herring]

On Wed, Jun 23, 2021 at 7:38 AM Biju Das <biju.das.jz@bp.renesas.com> wrote:
>
> Hi Rob,
>
> Thanks for the feedback.
>
> > Subject: Re: [PATCH v2 01/11] dt-bindings: phy: renesas: Document RZ/G2L
> > USB PHY Control bindings
> >
> > On Mon, Jun 21, 2021 at 10:39:33AM +0100, Biju Das wrote:
> > > Add device tree binding document for RZ/G2L USB PHY control driver.
> > >
> > > Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
> > > Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> > > ---
> > > V1->V2:
> > >  * Add clock properties
> > > ---
> > >  .../phy/renesas,rzg2l-usbphyctrl.yaml         | 65 +++++++++++++++++++
> > >  1 file changed, 65 insertions(+)
> > >  create mode 100644
> > > Documentation/devicetree/bindings/phy/renesas,rzg2l-usbphyctrl.yaml
> > >
> > > diff --git
> > > a/Documentation/devicetree/bindings/phy/renesas,rzg2l-usbphyctrl.yaml
> > > b/Documentation/devicetree/bindings/phy/renesas,rzg2l-usbphyctrl.yaml
> > > new file mode 100644
> > > index 000000000000..8e8ba43f595d
> > > --- /dev/null
> > > +++ b/Documentation/devicetree/bindings/phy/renesas,rzg2l-usbphyctrl.y
> > > +++ aml
> > > @@ -0,0 +1,65 @@
> > > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) %YAML 1.2
> > > +---
> > > +$id:
> > > +https://jpn01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdevi
> > > +cetree.org%2Fschemas%2Fphy%2Frenesas%2Crzg2l-usbphyctrl.yaml%23&amp;d
> > > +ata=04%7C01%7Cbiju.das.jz%40bp.renesas.com%7Cc6bbf5f6ce334eaa722a08d9
> > > +359f07ad%7C53d82571da1947e49cb4625a166a4a2a%7C0%7C0%7C637599779421910
> > > +039%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBT
> > > +iI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=Jcf6Om4DehifCe1KO1rmt5LxTB
> > > +6jtGoQLD1MoqWGM%2F0%3D&amp;reserved=0
> > > +$schema:
> > > +https://jpn01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdevi
> > > +cetree.org%2Fmeta-schemas%2Fcore.yaml%23&amp;data=04%7C01%7Cbiju.das.
> > > +jz%40bp.renesas.com%7Cc6bbf5f6ce334eaa722a08d9359f07ad%7C53d82571da19
> > > +47e49cb4625a166a4a2a%7C0%7C0%7C637599779421910039%7CUnknown%7CTWFpbGZ
> > > +sb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%
> > > +3D%7C1000&amp;sdata=LlqPRLf9%2BGrEdSapxCFhwxVKcXTVh9ECr%2FXPN0SIzi4%3
> > > +D&amp;reserved=0
> > > +
> > > +title: Renesas RZ/G2L USB2.0 PHY Control
> > > +
> > > +maintainers:
> > > +  - Biju Das <biju.das.jz@bp.renesas.com>
> > > +
> > > +description:
> > > +  The RZ/G2L USB2.0 PHY Control mainly controls reset and power down
> > > +of the
> > > +  USB/PHY.
> > > +
> > > +properties:
> > > +  compatible:
> > > +    items:
> > > +      - enum:
> > > +          - renesas,r9a07g044-usbphyctrl # RZ/G2{L,LC}
> > > +      - const: renesas,rzg2l-usbphyctrl
> > > +
> > > +  reg:
> > > +    maxItems: 1
> > > +
> > > +  clocks:
> > > +    maxItems: 1
> > > +
> > > +  resets:
> > > +    maxItems: 1
> > > +
> > > +  power-domains:
> > > +    maxItems: 1
> > > +
> > > +  '#phy-cells':
> > > +    # see phy-bindings.txt in the same directory
> > > +    const: 1
> > > +    description: |
> > > +      The phandle's argument in the PHY specifier is the phy reset
> > control bit
> > > +      of usb phy control.
> > > +      0 = Port 1 Phy reset
> > > +      1 = Port 2 Phy reset
> > > +    enum: [ 0, 1 ]
> >
> > You already have the const, so this doesn't do anything.
>
> OK, will take out const.

No, 'const' is correct. This is the value of '#phy-cells', not the
contents (we don't have a way to express schema for that).

> > > +required:
> > > +  - compatible
> > > +  - reg
> > > +  - clocks
> > > +  - '#phy-cells'
> > > +
> > > +additionalProperties: false
> > > +
> > > +examples:
> > > +  - |
> > > +    #include <dt-bindings/clock/r9a07g044-cpg.h>
> > > +
> > > +    usbphyctrl@11c40000 {
> >
> > usb-phy@...
>
> The IP is called USBPHY control. It mainly controls reset and power down of the USB2.0/PHY.

Sounds like it should be using the reset binding...

>
> So not sure usb-phy is right one here ? I prefer usb-phy-ctrl instead. Is it ok? Please let me know.

A node with #phy-cells should use the standard phy node names unless
it has other controls. As I said, this doesn't seem to be a phy, so
using #phy-cells here is what seems wrong.

> > > +        compatible = "renesas,r9a07g044-usbphyctrl",
> > > +                     "renesas,rzg2l-usbphyctrl";
> > > +        reg = <0x11c40000 0x10000>;
> > > +        clocks = <&cpg CPG_MOD R9A07G044_USB_PCLK>;
> > > +        resets = <&cpg R9A07G044_USB_PCLK>;
> > > +        power-domains = <&cpg>;

Also, are these all resources of the usbphyctrl block and not just
resources you happen to want in the driver? For example, the
power-domain should be the power island that this block resides in.

> > > +        #phy-cells = <1>;
> > > +    };
> > > --
> > > 2.17.1
> > >
> > >

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Re: [PATCH v2 01/11] dt-bindings: phy: renesas: Document RZ/G2L USB PHY Control bindings

[Geert Uytterhoeven]

Hi Rob,

On Wed, Jun 23, 2021 at 4:13 PM Rob Herring <robh@kernel.org> wrote:
> On Wed, Jun 23, 2021 at 7:38 AM Biju Das <biju.das.jz@bp.renesas.com> wrote:
> > > Subject: Re: [PATCH v2 01/11] dt-bindings: phy: renesas: Document RZ/G2L
> > > USB PHY Control bindings
> > >
> > > On Mon, Jun 21, 2021 at 10:39:33AM +0100, Biju Das wrote:
> > > > Add device tree binding document for RZ/G2L USB PHY control driver.
> > > >
> > > > Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
> > > > Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>

> > > > +        compatible = "renesas,r9a07g044-usbphyctrl",
> > > > +                     "renesas,rzg2l-usbphyctrl";
> > > > +        reg = <0x11c40000 0x10000>;
> > > > +        clocks = <&cpg CPG_MOD R9A07G044_USB_PCLK>;
> > > > +        resets = <&cpg R9A07G044_USB_PCLK>;
> > > > +        power-domains = <&cpg>;
>
> Also, are these all resources of the usbphyctrl block and not just
> resources you happen to want in the driver? For example, the
> power-domain should be the power island that this block resides in.

It's a clock domain, not a power area: the block goes into power-save
mode by stopping the module clock controlled by the CPG.

Gr{oetje,eeting}s,

                        Geert

-- 
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In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

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RE: [PATCH v2 01/11] dt-bindings: phy: renesas: Document RZ/G2L USB PHY Control bindings

[Biju Das]

Hi Rob,

Thanks for the feedback.

> Subject: Re: [PATCH v2 01/11] dt-bindings: phy: renesas: Document RZ/G2L
> USB PHY Control bindings
> 
> On Wed, Jun 23, 2021 at 7:38 AM Biju Das <biju.das.jz@bp.renesas.com>
> wrote:
> >
> > Hi Rob,
> >
> > Thanks for the feedback.
> >
> > > Subject: Re: [PATCH v2 01/11] dt-bindings: phy: renesas: Document
> > > RZ/G2L USB PHY Control bindings
> > >
> > > On Mon, Jun 21, 2021 at 10:39:33AM +0100, Biju Das wrote:
> > > > Add device tree binding document for RZ/G2L USB PHY control driver.
> > > >
> > > > Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
> > > > Reviewed-by: Lad Prabhakar
> > > > <prabhakar.mahadev-lad.rj@bp.renesas.com>
> > > > ---
> > > > V1->V2:
> > > >  * Add clock properties
> > > > ---
> > > >  .../phy/renesas,rzg2l-usbphyctrl.yaml         | 65
> +++++++++++++++++++
> > > >  1 file changed, 65 insertions(+)
> > > >  create mode 100644
> > > > Documentation/devicetree/bindings/phy/renesas,rzg2l-usbphyctrl.yam
> > > > l
> > > >
> > > > diff --git
> > > > a/Documentation/devicetree/bindings/phy/renesas,rzg2l-usbphyctrl.y
> > > > aml
> > > > b/Documentation/devicetree/bindings/phy/renesas,rzg2l-usbphyctrl.y
> > > > aml
> > > > new file mode 100644
> > > > index 000000000000..8e8ba43f595d
> > > > --- /dev/null
> > > > +++ b/Documentation/devicetree/bindings/phy/renesas,rzg2l-usbphyct
> > > > +++ rl.y
> > > > +++ aml
> > > > @@ -0,0 +1,65 @@
> > > > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) %YAML
> > > > +1.2
> > > > +---
> > > > +$id:
> > > > +https://jpn01.safelinks.protection.outlook.com/?url=http%3A%2F%2F
> > > > +devi
> > > > +cetree.org%2Fschemas%2Fphy%2Frenesas%2Crzg2l-usbphyctrl.yaml%23&a
> > > > +mp;d
> > > > +ata=04%7C01%7Cbiju.das.jz%40bp.renesas.com%7Cc6bbf5f6ce334eaa722a
> > > > +08d9
> > > > +359f07ad%7C53d82571da1947e49cb4625a166a4a2a%7C0%7C0%7C63759977942
> > > > +1910
> > > > +039%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiL
> > > > +CJBT
> > > > +iI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=Jcf6Om4DehifCe1KO1rmt5
> > > > +LxTB
> > > > +6jtGoQLD1MoqWGM%2F0%3D&amp;reserved=0
> > > > +$schema:
> > > > +https://jpn01.safelinks.protection.outlook.com/?url=http%3A%2F%2F
> > > > +devi
> > > > +cetree.org%2Fmeta-
> schemas%2Fcore.yaml%23&amp;data=04%7C01%7Cbiju.das.
> > > > +jz%40bp.renesas.com%7Cc6bbf5f6ce334eaa722a08d9359f07ad%7C53d82571
> > > > +da19
> > > > +47e49cb4625a166a4a2a%7C0%7C0%7C637599779421910039%7CUnknown%7CTWF
> > > > +pbGZ
> > > > +sb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6
> > > > +Mn0%
> > > > +3D%7C1000&amp;sdata=LlqPRLf9%2BGrEdSapxCFhwxVKcXTVh9ECr%2FXPN0SIz
> > > > +i4%3
> > > > +D&amp;reserved=0
> > > > +
> > > > +title: Renesas RZ/G2L USB2.0 PHY Control
> > > > +
> > > > +maintainers:
> > > > +  - Biju Das <biju.das.jz@bp.renesas.com>
> > > > +
> > > > +description:
> > > > +  The RZ/G2L USB2.0 PHY Control mainly controls reset and power
> > > > +down of the
> > > > +  USB/PHY.
> > > > +
> > > > +properties:
> > > > +  compatible:
> > > > +    items:
> > > > +      - enum:
> > > > +          - renesas,r9a07g044-usbphyctrl # RZ/G2{L,LC}
> > > > +      - const: renesas,rzg2l-usbphyctrl
> > > > +
> > > > +  reg:
> > > > +    maxItems: 1
> > > > +
> > > > +  clocks:
> > > > +    maxItems: 1
> > > > +
> > > > +  resets:
> > > > +    maxItems: 1
> > > > +
> > > > +  power-domains:
> > > > +    maxItems: 1
> > > > +
> > > > +  '#phy-cells':
> > > > +    # see phy-bindings.txt in the same directory
> > > > +    const: 1
> > > > +    description: |
> > > > +      The phandle's argument in the PHY specifier is the phy
> > > > + reset
> > > control bit
> > > > +      of usb phy control.
> > > > +      0 = Port 1 Phy reset
> > > > +      1 = Port 2 Phy reset
> > > > +    enum: [ 0, 1 ]
> > >
> > > You already have the const, so this doesn't do anything.
> >
> > OK, will take out const.
> 
> No, 'const' is correct. This is the value of '#phy-cells', not the
> contents (we don't have a way to express schema for that).

OK.

> 
> > > > +required:
> > > > +  - compatible
> > > > +  - reg
> > > > +  - clocks
> > > > +  - '#phy-cells'
> > > > +
> > > > +additionalProperties: false
> > > > +
> > > > +examples:
> > > > +  - |
> > > > +    #include <dt-bindings/clock/r9a07g044-cpg.h>
> > > > +
> > > > +    usbphyctrl@11c40000 {
> > >
> > > usb-phy@...
> >
> > The IP is called USBPHY control. It mainly controls reset and power down
> of the USB2.0/PHY.
> 
> Sounds like it should be using the reset binding...

This IP has reset, clock control , connection control , clock status and power down setting registers.
Currenty we are using reset registers for turning ON USB/PHY block.

Since it has extra registers I thought of modelling it as a phy device. But we could model as reset device as well.
But it has extra functionalities apart from reset.

So what do you propose here? Model as a reset device or phy device since it is related to phy?
Please share your opinion on this.

Regards,
Biju

> >
> > So not sure usb-phy is right one here ? I prefer usb-phy-ctrl instead.
> Is it ok? Please let me know.
> 
> A node with #phy-cells should use the standard phy node names unless it
> has other controls. 

Apart from reset, it has other controls like  clock control , connection control , clock status and powerdown setting registers.

Cheers,
Biju

As I said, this doesn't seem to be a phy, so using
> #phy-cells here is what seems wrong.
> 
> > > > +        compatible = "renesas,r9a07g044-usbphyctrl",
> > > > +                     "renesas,rzg2l-usbphyctrl";
> > > > +        reg = <0x11c40000 0x10000>;
> > > > +        clocks = <&cpg CPG_MOD R9A07G044_USB_PCLK>;
> > > > +        resets = <&cpg R9A07G044_USB_PCLK>;
> > > > +        power-domains = <&cpg>;
> 
> Also, are these all resources of the usbphyctrl block and not just
> resources you happen to want in the driver? For example, the power-domain
> should be the power island that this block resides in.
> 
> > > > +        #phy-cells = <1>;
> > > > +    };
> > > > --
> > > > 2.17.1
> > > >
> > > >

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RE: [PATCH v2 01/11] dt-bindings: phy: renesas: Document RZ/G2L USB PHY Control bindings

[Biju Das]

Hi Rob,

> Subject: RE: [PATCH v2 01/11] dt-bindings: phy: renesas: Document RZ/G2L
> USB PHY Control bindings
> 
> Hi Rob,
> 
> Thanks for the feedback.
> 
> > Subject: Re: [PATCH v2 01/11] dt-bindings: phy: renesas: Document
> > RZ/G2L USB PHY Control bindings
> >
> > On Wed, Jun 23, 2021 at 7:38 AM Biju Das <biju.das.jz@bp.renesas.com>
> > wrote:
> > >
> > > Hi Rob,
> > >
> > > Thanks for the feedback.
> > >
> > > > Subject: Re: [PATCH v2 01/11] dt-bindings: phy: renesas: Document
> > > > RZ/G2L USB PHY Control bindings
> > > >
> > > > On Mon, Jun 21, 2021 at 10:39:33AM +0100, Biju Das wrote:
> > > > > Add device tree binding document for RZ/G2L USB PHY control
> driver.
> > > > >
> > > > > Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
> > > > > Reviewed-by: Lad Prabhakar
> > > > > <prabhakar.mahadev-lad.rj@bp.renesas.com>
> > > > > ---
> > > > > V1->V2:
> > > > >  * Add clock properties
> > > > > ---
> > > > >  .../phy/renesas,rzg2l-usbphyctrl.yaml         | 65
> > +++++++++++++++++++
> > > > >  1 file changed, 65 insertions(+)  create mode 100644
> > > > > Documentation/devicetree/bindings/phy/renesas,rzg2l-usbphyctrl.y
> > > > > am
> > > > > l
> > > > >
> > > > > diff --git
> > > > > a/Documentation/devicetree/bindings/phy/renesas,rzg2l-usbphyctrl
> > > > > .y
> > > > > aml
> > > > > b/Documentation/devicetree/bindings/phy/renesas,rzg2l-usbphyctrl
> > > > > .y
> > > > > aml
> > > > > new file mode 100644
> > > > > index 000000000000..8e8ba43f595d
> > > > > --- /dev/null
> > > > > +++ b/Documentation/devicetree/bindings/phy/renesas,rzg2l-usbphy
> > > > > +++ ct
> > > > > +++ rl.y
> > > > > +++ aml
> > > > > @@ -0,0 +1,65 @@
> > > > > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) %YAML
> > > > > +1.2
> > > > > +---
> > > > > +$id:
> > > > > +https://jpn01.safelinks.protection.outlook.com/?url=http%3A%2F%
> > > > > +2F
> > > > > +devi
> > > > > +cetree.org%2Fschemas%2Fphy%2Frenesas%2Crzg2l-usbphyctrl.yaml%23
> > > > > +&a
> > > > > +mp;d
> > > > > +ata=04%7C01%7Cbiju.das.jz%40bp.renesas.com%7Cc6bbf5f6ce334eaa72
> > > > > +2a
> > > > > +08d9
> > > > > +359f07ad%7C53d82571da1947e49cb4625a166a4a2a%7C0%7C0%7C637599779
> > > > > +42
> > > > > +1910
> > > > > +039%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzI
> > > > > +iL
> > > > > +CJBT
> > > > > +iI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=Jcf6Om4DehifCe1KO1rm
> > > > > +t5
> > > > > +LxTB
> > > > > +6jtGoQLD1MoqWGM%2F0%3D&amp;reserved=0
> > > > > +$schema:
> > > > > +https://jpn01.safelinks.protection.outlook.com/?url=http%3A%2F%
> > > > > +2F
> > > > > +devi
> > > > > +cetree.org%2Fmeta-
> > schemas%2Fcore.yaml%23&amp;data=04%7C01%7Cbiju.das.
> > > > > +jz%40bp.renesas.com%7Cc6bbf5f6ce334eaa722a08d9359f07ad%7C53d825
> > > > > +71
> > > > > +da19
> > > > > +47e49cb4625a166a4a2a%7C0%7C0%7C637599779421910039%7CUnknown%7CT
> > > > > +WF
> > > > > +pbGZ
> > > > > +sb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVC
> > > > > +I6
> > > > > +Mn0%
> > > > > +3D%7C1000&amp;sdata=LlqPRLf9%2BGrEdSapxCFhwxVKcXTVh9ECr%2FXPN0S
> > > > > +Iz
> > > > > +i4%3
> > > > > +D&amp;reserved=0
> > > > > +
> > > > > +title: Renesas RZ/G2L USB2.0 PHY Control
> > > > > +
> > > > > +maintainers:
> > > > > +  - Biju Das <biju.das.jz@bp.renesas.com>
> > > > > +
> > > > > +description:
> > > > > +  The RZ/G2L USB2.0 PHY Control mainly controls reset and power
> > > > > +down of the
> > > > > +  USB/PHY.
> > > > > +
> > > > > +properties:
> > > > > +  compatible:
> > > > > +    items:
> > > > > +      - enum:
> > > > > +          - renesas,r9a07g044-usbphyctrl # RZ/G2{L,LC}
> > > > > +      - const: renesas,rzg2l-usbphyctrl
> > > > > +
> > > > > +  reg:
> > > > > +    maxItems: 1
> > > > > +
> > > > > +  clocks:
> > > > > +    maxItems: 1
> > > > > +
> > > > > +  resets:
> > > > > +    maxItems: 1
> > > > > +
> > > > > +  power-domains:
> > > > > +    maxItems: 1
> > > > > +
> > > > > +  '#phy-cells':
> > > > > +    # see phy-bindings.txt in the same directory
> > > > > +    const: 1
> > > > > +    description: |
> > > > > +      The phandle's argument in the PHY specifier is the phy
> > > > > + reset
> > > > control bit
> > > > > +      of usb phy control.
> > > > > +      0 = Port 1 Phy reset
> > > > > +      1 = Port 2 Phy reset
> > > > > +    enum: [ 0, 1 ]
> > > >
> > > > You already have the const, so this doesn't do anything.
> > >
> > > OK, will take out const.
> >
> > No, 'const' is correct. This is the value of '#phy-cells', not the
> > contents (we don't have a way to express schema for that).
> 
> OK.
> 
> >
> > > > > +required:
> > > > > +  - compatible
> > > > > +  - reg
> > > > > +  - clocks
> > > > > +  - '#phy-cells'
> > > > > +
> > > > > +additionalProperties: false
> > > > > +
> > > > > +examples:
> > > > > +  - |
> > > > > +    #include <dt-bindings/clock/r9a07g044-cpg.h>
> > > > > +
> > > > > +    usbphyctrl@11c40000 {
> > > >
> > > > usb-phy@...
> > >
> > > The IP is called USBPHY control. It mainly controls reset and power
> > > down
> > of the USB2.0/PHY.
> >
> > Sounds like it should be using the reset binding...

OK, Will model this as a reset binding. Since the IP mainly controls reset and power down
Of the USB2.0/PHY. So it is better to have reset binding.

Regards,
Biju

> This IP has reset, clock control , connection control , clock status and
> power down setting registers.
> Currenty we are using reset registers for turning ON USB/PHY block.
> 
> Since it has extra registers I thought of modelling it as a phy device.
> But we could model as reset device as well.
> But it has extra functionalities apart from reset.
> 
> So what do you propose here? Model as a reset device or phy device since
> it is related to phy?
> Please share your opinion on this.
> 
> Regards,
> Biju
> 
> > >
> > > So not sure usb-phy is right one here ? I prefer usb-phy-ctrl instead.
> > Is it ok? Please let me know.
> >
> > A node with #phy-cells should use the standard phy node names unless
> > it has other controls.
> 
> Apart from reset, it has other controls like  clock control , connection
> control , clock status and powerdown setting registers.
> 
> Cheers,
> Biju
> 
> As I said, this doesn't seem to be a phy, so using
> > #phy-cells here is what seems wrong.
> >
> > > > > +        compatible = "renesas,r9a07g044-usbphyctrl",
> > > > > +                     "renesas,rzg2l-usbphyctrl";
> > > > > +        reg = <0x11c40000 0x10000>;
> > > > > +        clocks = <&cpg CPG_MOD R9A07G044_USB_PCLK>;
> > > > > +        resets = <&cpg R9A07G044_USB_PCLK>;
> > > > > +        power-domains = <&cpg>;
> >
> > Also, are these all resources of the usbphyctrl block and not just
> > resources you happen to want in the driver? For example, the
> > power-domain should be the power island that this block resides in.
> >
> > > > > +        #phy-cells = <1>;
> > > > > +    };
> > > > > --
> > > > > 2.17.1
> > > > >
> > > > >

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