[PATCH v5 0/7] Add initial USB support for the Renesas RZ/G3S SoC

[PATCH v5 0/7] Add initial USB support for the Renesas RZ/G3S SoC

[Claudiu]

From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>

Hi,

Series adds initial USB support for the Renesas RZ/G3S SoC.

Series is split as follows:
- patches 1-2/7		- fixes on bindings and driver for USB PHY
- patches 3-5/7		- updates the rzg2l-usbphy-ctrl driver and documentation
			  with support for setting PWRRDY though SYSC
- patches 6-7/7		- add device tree support

Merge strategy, if any:
- patches 1-2/7 can go through the PHY tree
- patches 3-5/7 can go through the reset tree
- patches 6-7/7 can go through Renesas tree

Thank you,
Claudiu Beznea

Changes in v5:
- dropped patch "soc: renesas: rz-sysc: Add syscon/regmap support" as it
  already modified and pubished also at [2] with the latest review comments
  addressed
- fixed the documentation

Changes in v4:
- replaced "renesas,sysc-signals" DT property with "renesas,sysc-pwrrdy"
- dropped the "renesas,sysc-signals" property from USB PHY (as proposed
  in v3) and let only the USB PHY CTRL driver to handle it as on RZ/G3S
  the USB PHY CTRL driver needs to be probed before any other USB driver
- dropped the signal abstraction from SYSC driver as there is no need
  for reference counting it now
- adjusted the "soc: renesas: rz-sysc: Add syscon/regmap support" to
  comply with the latest review comments

Changes in v3:
- as the basics of the SYSC driver was integrated, only the signal support
  was preserved in this series, in a separate patch; patch 01/12 was
  adjusted (by addressing the review comments received at [1]) as it is
  necessary to build the signal support on top of it
- after long discussions with the internal HW team it has been confirmed
  that the relation b/w individual USB specific HW blocks and signals
  is like:

                                   ┌──────────────────────────────┐
                                   │                              │◄── CPG_CLKON_USB.CLK0_ON
                                   │     USB CH0                  │
    ┌──────────────────────────┐   │┌───────────────────────────┐ │◄── CPG_CLKON_USB.CLK2_ON
    │                 ┌────────┐   ││host controller registers  │ │
    │                 │        │   ││function controller registers│
    │                 │ PHY0   │◄──┤└───────────────────────────┘ │
    │     USB PHY     │        │   └────────────▲─────────────────┘
    │                 └────────┘                │
    │                          │    CPG_BUS_PERI_COM_MSTOP.MSTOP{6, 5}_ON
    │┌──────────────┐ ┌────────┐
    ││USBPHY control│ │        │
    ││  registers   │ │ PHY1   │   ┌──────────────────────────────┐
    │└──────────────┘ │        │◄──┤     USB CH1                  │
    │                 └────────┘   │┌───────────────────────────┐ │◄── CPG_CLKON_USB.CLK1_ON
    └─▲───────▲─────────▲──────┘   ││ host controller registers │ │
      │       │         │          │└───────────────────────────┘ │
      │       │         │          └────────────▲─────────────────┘
      │       │         │                       │
      │       │         │           CPG_BUS_PERI_COM_MSTOP.MSTOP7_ON
      │PWRRDY │         │
      │       │   CPG_CLK_ON_USB.CLK3_ON
      │       │
      │  CPG_BUS_PERI_COM_MSTOP.MSTOP4_ON
      │
    ┌────┐
    │SYSC│
    └────┘

  where:
  - CPG_CLKON_USB.CLK.CLKX_ON is the register bit controlling the clock X
      of different USB blocks, X in {0, 1, 2, 3}
  - CPG_BUS_PERI_COM_MSTOP.MSTOPX_ON is the register bit controlling the
    MSTOP of different USB blocks, X in {4, 5, 6, 7}
  - USB PHY is the USB PHY block exposing 2 ports, port0 and port1, used
    by the USB CH0, USB CH1
  - SYSC is the system controller block controlling the PWRRDY signal
  - USB CHx are individual USB block with host and function capabilities
    (USB CH0 have both host and function capabilities, USB CH1 has only
    host capabilities)

  Due to this, the PWRRDY signal was also passed to the reset-rzg2l-usbphy-ctrl
  reset driver (as it controls the USBPHY control registers) and these
  are in the USB PHY block controlled by PWRRDY signal.

  The PWRRDY signal need to be de-asserted on probe before enabling the module
  clocks and the module MSTOP. To avoid any violation of this configuration
  sequence, the PWRRDY signal is now controlled by USB PHY driver and the
  reset-rzg2l-usbphy-ctrl driver.

  As the PHYs gets reset signals from the USB reset controller driver, the
  reset-rzg2l-usbphy-ctrl is probed before the USB PHY driver and thus,
  in theory, we can drop the signal support (reference counting of the
  USB PWRRDY) and configure the USB PWRRDY just in the reset-rzg2l-usbphy-ctrl.

  However, to have a proper description of the diagram described above in 
  device tree and ensure the configuration sequence b/w PRWRDY, CLK and MSTOP
  is preserved, the PWRRDY signal is controlled in this series in all the
  drivers that work with registers from the USB PHY block.

  Please provide your feedback on this solution.

Thank you,
Claudiu

[1] https://lore.kernel.org/all/20250330214945.185725-2-john.madieu.xa@bp.renesas.com/
[2] https://lore.kernel.org/all/20250818162859.9661-2-john.madieu.xa@bp.renesas.com/

Changes in v2:
- dropped v1 patches already applied
- added fixes patches (07/14 and 09/14)
- dropped the approach of handling the USB PWRRDY though a reset controller
  driver and introduced the signal concept for the SYSC driver; because
  of this, most of the work done in v1 was dropped
- per patch changes are listed in individual patches, if any

Christophe JAILLET (1):
  phy: renesas: rcar-gen3-usb2: Fix an error handling path in
    rcar_gen3_phy_usb2_probe()

Claudiu Beznea (6):
  dt-bindings: phy: renesas,usb2-phy: Mark resets as required for RZ/G3S
  dt-bindings: reset: renesas,rzg2l-usbphy-ctrl: Document RZ/G3S support
  reset: rzg2l-usbphy-ctrl: Add support for USB PWRRDY
  reset: rzg2l-usbphy-ctrl: Add support for RZ/G3S SoC
  arm64: dts: renesas: r9a08g045: Add USB support
  arm64: dts: renesas: rzg3s-smarc: Enable USB support

 .../bindings/phy/renesas,usb2-phy.yaml        |   1 +
 .../reset/renesas,rzg2l-usbphy-ctrl.yaml      |  41 +++++-
 arch/arm64/boot/dts/renesas/r9a08g045.dtsi    | 118 ++++++++++++++++++
 arch/arm64/boot/dts/renesas/rzg3s-smarc.dtsi  |  57 +++++++++
 drivers/phy/renesas/phy-rcar-gen3-usb2.c      |  11 +-
 drivers/reset/Kconfig                         |   1 +
 drivers/reset/reset-rzg2l-usbphy-ctrl.c       |  70 +++++++++++
 7 files changed, 292 insertions(+), 7 deletions(-)

-- 
2.43.0

[PATCH v5 1/7] dt-bindings: phy: renesas,usb2-phy: Mark resets as required for RZ/G3S

[Claudiu]

From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>

The reset lines are mandatory for the Renesas RZ/G3S platform and must be
explicitly defined in device tree.

Fixes: f3c849855114 ("dt-bindings: phy: renesas,usb2-phy: Document RZ/G3S phy bindings")
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
---

Changes in v5:
- none

Changes in v4:
- none

Changes in v3:
- collected tags
- rebased on top of latest version of renesas,usb2-phy.yaml;
  Conor, Geert: I kept your tags; please let me know if you consider it
  otherwise

Changes in v2:
- none; this patch is new

 Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml b/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
index f45c5f039ae8..52d777057281 100644
--- a/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
+++ b/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
@@ -112,6 +112,7 @@ allOf:
           contains:
             enum:
               - renesas,usb2-phy-r9a09g057
+              - renesas,usb2-phy-r9a08g045
               - renesas,rzg2l-usb2-phy
     then:
       properties:
-- 
2.43.0

[PATCH v5 2/7] phy: renesas: rcar-gen3-usb2: Fix an error handling path in rcar_gen3_phy_usb2_probe()

[Claudiu]

From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>

If an error occurs after the reset_control_deassert(),
reset_control_assert() must be called, as already done in the remove
function.

Use devm_add_action_or_reset() to add the missing call and simplify the
.remove() function accordingly.

Fixes: 4eae16375357 ("phy: renesas: rcar-gen3-usb2: Add support to initialize the bus")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
[claudiu.beznea: removed "struct reset_control *rstc = data;" from
 rcar_gen3_reset_assert()]
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
---

Changes in v5:
- none

Changes in v4:
- none

Changes in v3:
- collected tags

Changes in v2:
- none; this patch is new; re-spinned the Christophe's work at
  https://lore.kernel.org/all/TYCPR01MB113329930BA5E2149C9BE2A1986672@TYCPR01MB11332.jpnprd01.prod.outlook.com/


 drivers/phy/renesas/phy-rcar-gen3-usb2.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/phy/renesas/phy-rcar-gen3-usb2.c b/drivers/phy/renesas/phy-rcar-gen3-usb2.c
index 47beb94cd424..d61c171d454f 100644
--- a/drivers/phy/renesas/phy-rcar-gen3-usb2.c
+++ b/drivers/phy/renesas/phy-rcar-gen3-usb2.c
@@ -699,6 +699,11 @@ static enum usb_dr_mode rcar_gen3_get_dr_mode(struct device_node *np)
 	return candidate;
 }
 
+static void rcar_gen3_reset_assert(void *data)
+{
+	reset_control_assert(data);
+}
+
 static int rcar_gen3_phy_usb2_init_bus(struct rcar_gen3_chan *channel)
 {
 	struct device *dev = channel->dev;
@@ -717,6 +722,11 @@ static int rcar_gen3_phy_usb2_init_bus(struct rcar_gen3_chan *channel)
 	if (ret)
 		goto rpm_put;
 
+	ret = devm_add_action_or_reset(dev, rcar_gen3_reset_assert,
+				       channel->rstc);
+	if (ret)
+		goto rpm_put;
+
 	val = readl(channel->base + USB2_AHB_BUS_CTR);
 	val &= ~USB2_AHB_BUS_CTR_MBL_MASK;
 	val |= USB2_AHB_BUS_CTR_MBL_INCR4;
@@ -860,7 +870,6 @@ static void rcar_gen3_phy_usb2_remove(struct platform_device *pdev)
 	if (channel->is_otg_channel)
 		device_remove_file(&pdev->dev, &dev_attr_role);
 
-	reset_control_assert(channel->rstc);
 	pm_runtime_disable(&pdev->dev);
 };
 
-- 
2.43.0

[PATCH v5 3/7] dt-bindings: reset: renesas,rzg2l-usbphy-ctrl: Document RZ/G3S support

[Claudiu]

From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>

The Renesas USB PHY hardware block needs to have the PWRRDY bit in the
system controller set before applying any other settings. The PWRRDY bit
must be controlled during power-on, power-off, and system suspend/resume
sequences as follows:
- during power-on/resume, it must be set to zero before enabling clocks and
  modules
- during power-off/suspend, it must be set to one after disabling clocks
  and modules

Add the renesas,sysc-pwrrdy device tree property, which allows the
reset-rzg2l-usbphy-ctrl driver to parse, map, and control the system
controller PWRRDY bit at the appropriate time. Along with it add a new
compatible for the RZ/G3S SoC.

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
---

Changes in v5:
- fixed description formatting
- collected tags

Changes in v4:
- dropped blank line from compatible section
- s/renesas,sysc-signals/renesas,sysc-pwrrdy/g
- dropped description from renesas,sysc-pwrrdy
- updated description of renesas,sysc-pwrrdy items
- updated patch description

Changes in v3:
- none; this patch is new

 .../reset/renesas,rzg2l-usbphy-ctrl.yaml      | 41 ++++++++++++++++---
 1 file changed, 35 insertions(+), 6 deletions(-)

diff --git a/Documentation/devicetree/bindings/reset/renesas,rzg2l-usbphy-ctrl.yaml b/Documentation/devicetree/bindings/reset/renesas,rzg2l-usbphy-ctrl.yaml
index b0b20af15313..c83469a1b379 100644
--- a/Documentation/devicetree/bindings/reset/renesas,rzg2l-usbphy-ctrl.yaml
+++ b/Documentation/devicetree/bindings/reset/renesas,rzg2l-usbphy-ctrl.yaml
@@ -15,12 +15,14 @@ description:
 
 properties:
   compatible:
-    items:
-      - enum:
-          - renesas,r9a07g043-usbphy-ctrl # RZ/G2UL and RZ/Five
-          - renesas,r9a07g044-usbphy-ctrl # RZ/G2{L,LC}
-          - renesas,r9a07g054-usbphy-ctrl # RZ/V2L
-      - const: renesas,rzg2l-usbphy-ctrl
+    oneOf:
+      - items:
+          - enum:
+              - renesas,r9a07g043-usbphy-ctrl # RZ/G2UL and RZ/Five
+              - renesas,r9a07g044-usbphy-ctrl # RZ/G2{L,LC}
+              - renesas,r9a07g054-usbphy-ctrl # RZ/V2L
+          - const: renesas,rzg2l-usbphy-ctrl
+      - const: renesas,r9a08g045-usbphy-ctrl # RZ/G3S
 
   reg:
     maxItems: 1
@@ -48,6 +50,20 @@ properties:
     $ref: /schemas/regulator/regulator.yaml#
     unevaluatedProperties: false
 
+  renesas,sysc-pwrrdy:
+    description:
+      The system controller PWRRDY indicates to the USB PHY if the power supply
+      is ready. PWRRDY needs to be set during power-on before applying any
+      other settings. It also needs to be set before powering off the USB.
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    items:
+      - items:
+          - description:
+              System controller phandle required by USB PHY CTRL driver to set
+              PWRRDY
+          - description: Register offset associated with PWRRDY
+          - description: Register bitmask associated with PWRRDY
+
 required:
   - compatible
   - reg
@@ -57,6 +73,19 @@ required:
   - '#reset-cells'
   - regulator-vbus
 
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: renesas,r9a08g045-usbphy-ctrl
+    then:
+      required:
+        - renesas,sysc-pwrrdy
+    else:
+      properties:
+        renesas,sysc-pwrrdy: false
+
 additionalProperties: false
 
 examples:
-- 
2.43.0

[PATCH v5 4/7] reset: rzg2l-usbphy-ctrl: Add support for USB PWRRDY

[Claudiu]

From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>

On the Renesas RZ/G3S SoC, the USB PHY block has an input signal called
PWRRDY. This signal is managed by the system controller and must be
de-asserted after powering on the area where USB PHY resides and asserted
before powering it off.

On power-on the USB PWRRDY signal need to be de-asserted before enabling
clock and switching the module to normal state (through MSTOP support). The
power-on configuration sequence must be:

1/ PWRRDY=0
2/ CLK_ON=1
3/ MSTOP=0

On power-off the configuration sequence should be:

1/ MSTOP=1
2/ CLK_ON=0
3/ PWRRDY=1

The CLK_ON and MSTOP functionalities are controlled by clock drivers.

After long discussions with the internal HW team, it has been confirmed
that the HW connection b/w USB PHY block, the USB channels, the system
controller, clock, MSTOP, PWRRDY signal is as follows:

                               ┌──────────────────────────────┐
                               │                              │◄── CPG_CLKON_USB.CLK0_ON
                               │     USB CH0                  │
┌──────────────────────────┐   │┌───────────────────────────┐ │◄── CPG_CLKON_USB.CLK2_ON
│                 ┌────────┐   ││host controller registers  │ │
│                 │        │   ││function controller registers│
│                 │ PHY0   │◄──┤└───────────────────────────┘ │
│     USB PHY     │        │   └────────────▲─────────────────┘
│                 └────────┘                │
│                          │    CPG_BUS_PERI_COM_MSTOP.MSTOP{6, 5}_ON
│┌──────────────┐ ┌────────┐
││USHPHY control│ │        │
││  registers   │ │ PHY1   │   ┌──────────────────────────────┐
│└──────────────┘ │        │◄──┤     USB CH1                  │
│                 └────────┘   │┌───────────────────────────┐ │◄── CPG_CLKON_USB.CLK1_ON
└─▲───────▲─────────▲──────┘   ││ host controller registers │ │
  │       │         │          │└───────────────────────────┘ │
  │       │         │          └────────────▲─────────────────┘
  │       │         │                       │
  │       │         │           CPG_BUS_PERI_COM_MSTOP.MSTOP7_ON
  │PWRRDY │         │
  │       │   CPG_CLK_ON_USB.CLK3_ON
  │       │
  │  CPG_BUS_PERI_COM_MSTOP.MSTOP4_ON
  │
┌────┐
│SYSC│
└────┘

where:
- CPG_CLKON_USB.CLK.CLKX_ON is the register bit controlling the clock X
  of different USB blocks, X in {0, 1, 2, 3}
- CPG_BUS_PERI_COM_MSTOP.MSTOPX_ON is the register bit controlling the
  MSTOP of different USB blocks, X in {4, 5, 6, 7}
- USB PHY is the USB PHY block exposing 2 ports, port0 and port1, used
  by the USB CH0, USB CH1
- SYSC is the system controller block controlling the PWRRDY signal
- USB CHx are individual USB block with host and function capabilities
  (USB CH0 have both host and function capabilities, USB CH1 has only
  host capabilities)

The USBPHY control registers are controlled though the
reset-rzg2l-usbphy-ctrl driver. The USB PHY ports are controlled by
phy_rcar_gen3_usb2 (drivers/phy/renesas/phy-rcar-gen3-usb2.c file). The
USB PHY ports request resets from the reset-rzg2l-usbphy-ctrl driver.

The connection b/w the system controller and the USB PHY CTRL driver is
implemented through the renesas,sysc-pwrrdy device tree property
proposed in this patch. This property specifies the register offset and the
bitmask required to control the PWRRDY signal.

Since the USB PHY CTRL driver needs to be probed before any other
USB-specific driver on RZ/G3S, control of PWRRDY is passed exclusively
to it. This guarantees the correct configuration sequence between clocks,
MSTOP bits, and the PWRRDY bit. At the same time, changes are kept minimal
by avoiding modifications to the USB PHY driver to also handle the PWRRDY
itself.

Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
---

Changes in v5:
- none

Changes in v4:
- updated patch description
- updated rzg2l_usbphy_ctrl_pwrrdy_init() to map directly the
  "renesas,sysc-pwrrdy" as the SYSC signal abstraction was dropped
  in this version, along with rz_sysc_get_signal_map()
- dropped priv member of rzg2l_usbphy_ctrl_pwrrdy_init() as it is
  not needed in this version
- shift left !power_on with pwrrdy->mask as this is how the
  regmap_update_bits() needs the last member to be
- selected MFD_SYSCON

Changes in v3:
- none; this patch is new

 drivers/reset/Kconfig                   |  1 +
 drivers/reset/reset-rzg2l-usbphy-ctrl.c | 66 +++++++++++++++++++++++++
 2 files changed, 67 insertions(+)

diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig
index 78b7078478d4..329730cbcfb9 100644
--- a/drivers/reset/Kconfig
+++ b/drivers/reset/Kconfig
@@ -237,6 +237,7 @@ config RESET_RASPBERRYPI
 config RESET_RZG2L_USBPHY_CTRL
 	tristate "Renesas RZ/G2L USBPHY control driver"
 	depends on ARCH_RZG2L || COMPILE_TEST
+	select MFD_SYSCON
 	help
 	  Support for USBPHY Control found on RZ/G2L family. It mainly
 	  controls reset and power down of the USB/PHY.
diff --git a/drivers/reset/reset-rzg2l-usbphy-ctrl.c b/drivers/reset/reset-rzg2l-usbphy-ctrl.c
index 8a7f167e405e..3856072b23a3 100644
--- a/drivers/reset/reset-rzg2l-usbphy-ctrl.c
+++ b/drivers/reset/reset-rzg2l-usbphy-ctrl.c
@@ -13,6 +13,7 @@
 #include <linux/regmap.h>
 #include <linux/reset.h>
 #include <linux/reset-controller.h>
+#include <linux/mfd/syscon.h>
 
 #define RESET			0x000
 #define VBENCTL			0x03c
@@ -41,6 +42,18 @@ struct rzg2l_usbphy_ctrl_priv {
 
 #define rcdev_to_priv(x)	container_of(x, struct rzg2l_usbphy_ctrl_priv, rcdev)
 
+/**
+ * struct rzg2l_usbphy_ctrl_pwrrdy - SYSC PWRRDY signal descriptor
+ * @regmap: SYSC regmap
+ * @offset: offset into the SYSC address space for accessing PWRRDY
+ * @mask: mask into the register at offset for accessing PWRRDY
+ */
+struct rzg2l_usbphy_ctrl_pwrrdy {
+	struct regmap *regmap;
+	u32 offset;
+	u32 mask;
+};
+
 static int rzg2l_usbphy_ctrl_assert(struct reset_controller_dev *rcdev,
 				    unsigned long id)
 {
@@ -91,6 +104,8 @@ static int rzg2l_usbphy_ctrl_status(struct reset_controller_dev *rcdev,
 	return !!(readl(priv->base + RESET) & port_mask);
 }
 
+#define RZG2L_USBPHY_CTRL_PWRRDY	1
+
 static const struct of_device_id rzg2l_usbphy_ctrl_match_table[] = {
 	{ .compatible = "renesas,rzg2l-usbphy-ctrl" },
 	{ /* Sentinel */ }
@@ -110,6 +125,53 @@ static const struct regmap_config rzg2l_usb_regconf = {
 	.max_register = 1,
 };
 
+static void rzg2l_usbphy_ctrl_set_pwrrdy(struct rzg2l_usbphy_ctrl_pwrrdy *pwrrdy,
+					 bool power_on)
+{
+	regmap_update_bits(pwrrdy->regmap, pwrrdy->offset, pwrrdy->mask,
+			   !power_on << pwrrdy->mask);
+}
+
+static void rzg2l_usbphy_ctrl_pwrrdy_off(void *data)
+{
+	rzg2l_usbphy_ctrl_set_pwrrdy(data, false);
+}
+
+static int rzg2l_usbphy_ctrl_pwrrdy_init(struct device *dev)
+{
+	struct rzg2l_usbphy_ctrl_pwrrdy *pwrrdy;
+	struct of_phandle_args args;
+	struct regmap *regmap;
+	const int *data;
+	int ret;
+
+	data = device_get_match_data(dev);
+	if (data != (int *)RZG2L_USBPHY_CTRL_PWRRDY)
+		return 0;
+
+	ret = of_parse_phandle_with_fixed_args(dev->of_node, "renesas,sysc-pwrrdy", 2,
+					       0, &args);
+	if (ret)
+		return ret;
+
+	regmap = syscon_node_to_regmap(args.np);
+	of_node_put(args.np);
+	if (IS_ERR(regmap))
+		return PTR_ERR(regmap);
+
+	pwrrdy = devm_kzalloc(dev, sizeof(*pwrrdy), GFP_KERNEL);
+	if (!pwrrdy)
+		return -ENOMEM;
+
+	pwrrdy->regmap = regmap;
+	pwrrdy->offset = args.args[0];
+	pwrrdy->mask = args.args[1];
+
+	rzg2l_usbphy_ctrl_set_pwrrdy(pwrrdy, true);
+
+	return devm_add_action_or_reset(dev, rzg2l_usbphy_ctrl_pwrrdy_off, pwrrdy);
+}
+
 static int rzg2l_usbphy_ctrl_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -132,6 +194,10 @@ static int rzg2l_usbphy_ctrl_probe(struct platform_device *pdev)
 	if (IS_ERR(regmap))
 		return PTR_ERR(regmap);
 
+	error = rzg2l_usbphy_ctrl_pwrrdy_init(dev);
+	if (error)
+		return error;
+
 	priv->rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL);
 	if (IS_ERR(priv->rstc))
 		return dev_err_probe(dev, PTR_ERR(priv->rstc),
-- 
2.43.0

[PATCH v5 5/7] reset: rzg2l-usbphy-ctrl: Add support for RZ/G3S SoC

[Claudiu]

From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>

The Renesas RZ/G3S SoC USB PHY HW block receives as input the USB PWRRDY
signal from the system controller. Add support for the Renesas RZ/G3S SoC.

Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
---

Changes in v5:
- none

Changes in v4:
- none

Changes in v3:
- none; this patch is new

 drivers/reset/reset-rzg2l-usbphy-ctrl.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/reset/reset-rzg2l-usbphy-ctrl.c b/drivers/reset/reset-rzg2l-usbphy-ctrl.c
index 3856072b23a3..924c614f84cd 100644
--- a/drivers/reset/reset-rzg2l-usbphy-ctrl.c
+++ b/drivers/reset/reset-rzg2l-usbphy-ctrl.c
@@ -108,6 +108,10 @@ static int rzg2l_usbphy_ctrl_status(struct reset_controller_dev *rcdev,
 
 static const struct of_device_id rzg2l_usbphy_ctrl_match_table[] = {
 	{ .compatible = "renesas,rzg2l-usbphy-ctrl" },
+	{
+		.compatible = "renesas,r9a08g045-usbphy-ctrl",
+		.data = (void *)RZG2L_USBPHY_CTRL_PWRRDY
+	},
 	{ /* Sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, rzg2l_usbphy_ctrl_match_table);
-- 
2.43.0

[PATCH v5 6/7] arm64: dts: renesas: r9a08g045: Add USB support

[Claudiu]

From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>

Add USB nodes for the Renesas RZ/G3S SoC. This consists of PHY reset,
host and device support.

Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
---

Changes in v5:
- none

Changes in v4:
- dropped renesas,sysc-signals from usb2_phy0, usb2_phy1 nodes
- s/renesas,sysc-signals/renesas,sysc-pwrrdy/g

Changes in v3:
- changed the nodes order to keep similar nodes toghether

Changes in v2:
- this was patch 14/16 in v1
- added renesas,sysc-signal properties to USB PHYs
- collected tags
- Geert: I kept your tag; please let me know if you consider otherwise 

 arch/arm64/boot/dts/renesas/r9a08g045.dtsi | 118 +++++++++++++++++++++
 1 file changed, 118 insertions(+)

diff --git a/arch/arm64/boot/dts/renesas/r9a08g045.dtsi b/arch/arm64/boot/dts/renesas/r9a08g045.dtsi
index 0364f89776e6..b7ad6db0174b 100644
--- a/arch/arm64/boot/dts/renesas/r9a08g045.dtsi
+++ b/arch/arm64/boot/dts/renesas/r9a08g045.dtsi
@@ -681,6 +681,124 @@ eth1: ethernet@11c40000 {
 			status = "disabled";
 		};
 
+		phyrst: usbphy-ctrl@11e00000 {
+			compatible = "renesas,r9a08g045-usbphy-ctrl";
+			reg = <0 0x11e00000 0 0x10000>;
+			clocks = <&cpg CPG_MOD R9A08G045_USB_PCLK>;
+			resets = <&cpg R9A08G045_USB_PRESETN>;
+			power-domains = <&cpg>;
+			#reset-cells = <1>;
+			renesas,sysc-pwrrdy = <&sysc 0xd70 0x1>;
+			status = "disabled";
+
+			usb0_vbus_otg: regulator-vbus {
+				regulator-name = "vbus";
+			};
+		};
+
+		ohci0: usb@11e10000 {
+			compatible = "generic-ohci";
+			reg = <0 0x11e10000 0 0x100>;
+			interrupts = <GIC_SPI 75 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD R9A08G045_USB_PCLK>,
+				 <&cpg CPG_MOD R9A08G045_USB_U2H0_HCLK>;
+			resets = <&phyrst 0>,
+				 <&cpg R9A08G045_USB_U2H0_HRESETN>;
+			phys = <&usb2_phy0 1>;
+			phy-names = "usb";
+			power-domains = <&cpg>;
+			status = "disabled";
+		};
+
+		ohci1: usb@11e30000 {
+			compatible = "generic-ohci";
+			reg = <0 0x11e30000 0 0x100>;
+			interrupts = <GIC_SPI 80 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD R9A08G045_USB_PCLK>,
+				 <&cpg CPG_MOD R9A08G045_USB_U2H1_HCLK>;
+			resets = <&phyrst 1>,
+				 <&cpg R9A08G045_USB_U2H1_HRESETN>;
+			phys = <&usb2_phy1 1>;
+			phy-names = "usb";
+			power-domains = <&cpg>;
+			status = "disabled";
+		};
+
+		ehci0: usb@11e10100 {
+			compatible = "generic-ehci";
+			reg = <0 0x11e10100 0 0x100>;
+			interrupts = <GIC_SPI 76 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD R9A08G045_USB_PCLK>,
+				 <&cpg CPG_MOD R9A08G045_USB_U2H0_HCLK>;
+			resets = <&phyrst 0>,
+				 <&cpg R9A08G045_USB_U2H0_HRESETN>;
+			phys = <&usb2_phy0 2>;
+			phy-names = "usb";
+			companion = <&ohci0>;
+			power-domains = <&cpg>;
+			status = "disabled";
+		};
+
+		ehci1: usb@11e30100 {
+			compatible = "generic-ehci";
+			reg = <0 0x11e30100 0 0x100>;
+			interrupts = <GIC_SPI 81 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD R9A08G045_USB_PCLK>,
+				 <&cpg CPG_MOD R9A08G045_USB_U2H1_HCLK>;
+			resets = <&phyrst 1>,
+				 <&cpg R9A08G045_USB_U2H1_HRESETN>;
+			phys = <&usb2_phy1 2>;
+			phy-names = "usb";
+			companion = <&ohci1>;
+			power-domains = <&cpg>;
+			status = "disabled";
+		};
+
+		usb2_phy0: usb-phy@11e10200 {
+			compatible = "renesas,usb2-phy-r9a08g045";
+			reg = <0 0x11e10200 0 0x700>;
+			interrupts = <GIC_SPI 78 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD R9A08G045_USB_PCLK>,
+				 <&cpg CPG_MOD R9A08G045_USB_U2H0_HCLK>;
+			resets = <&phyrst 0>,
+				 <&cpg R9A08G045_USB_U2H0_HRESETN>;
+			#phy-cells = <1>;
+			power-domains = <&cpg>;
+			status = "disabled";
+		};
+
+		usb2_phy1: usb-phy@11e30200 {
+			compatible = "renesas,usb2-phy-r9a08g045";
+			reg = <0 0x11e30200 0 0x700>;
+			interrupts = <GIC_SPI 83 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD R9A08G045_USB_PCLK>,
+				 <&cpg CPG_MOD R9A08G045_USB_U2H1_HCLK>;
+			resets = <&phyrst 1>,
+				 <&cpg R9A08G045_USB_U2H1_HRESETN>;
+			#phy-cells = <1>;
+			power-domains = <&cpg>;
+			status = "disabled";
+		};
+
+		hsusb: usb@11e20000 {
+			compatible = "renesas,usbhs-r9a08g045",
+				     "renesas,rzg2l-usbhs";
+			reg = <0 0x11e20000 0 0x10000>;
+			interrupts = <GIC_SPI 85 IRQ_TYPE_EDGE_RISING>,
+				     <GIC_SPI 86 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 87 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 84 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD R9A08G045_USB_PCLK>,
+				 <&cpg CPG_MOD R9A08G045_USB_U2P_EXR_CPUCLK>;
+			resets = <&phyrst 0>,
+				 <&cpg R9A08G045_USB_U2P_EXL_SYSRST>;
+			renesas,buswait = <7>;
+			phys = <&usb2_phy0 3>;
+			phy-names = "usb";
+			power-domains = <&cpg>;
+			status = "disabled";
+		};
+
 		gic: interrupt-controller@12400000 {
 			compatible = "arm,gic-v3";
 			#interrupt-cells = <3>;
-- 
2.43.0

[PATCH v5 7/7] arm64: dts: renesas: rzg3s-smarc: Enable USB support

[Claudiu]

From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>

Enable USB support (host, device, USB PHYs).

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
---

Changes in v5:
- none

Changes in v4:
- none

Changes in v3:
- collected tags

Changes in v2:
- this was patch 15/16 in v1:
- dropped sysc enablement as it is now done in SoC dtsi file

 arch/arm64/boot/dts/renesas/rzg3s-smarc.dtsi | 57 ++++++++++++++++++++
 1 file changed, 57 insertions(+)

diff --git a/arch/arm64/boot/dts/renesas/rzg3s-smarc.dtsi b/arch/arm64/boot/dts/renesas/rzg3s-smarc.dtsi
index 5e044a4d0234..5586dd43c4d5 100644
--- a/arch/arm64/boot/dts/renesas/rzg3s-smarc.dtsi
+++ b/arch/arm64/boot/dts/renesas/rzg3s-smarc.dtsi
@@ -92,6 +92,20 @@ &audio_clk2 {
 	clock-frequency = <12288000>;
 };
 
+&ehci0 {
+	dr_mode = "otg";
+	status = "okay";
+};
+
+&ehci1 {
+	status = "okay";
+};
+
+&hsusb {
+	dr_mode = "otg";
+	status = "okay";
+};
+
 &i2c0 {
 	status = "okay";
 
@@ -132,6 +146,15 @@ power-monitor@44 {
 	};
 };
 
+&ohci0 {
+	dr_mode = "otg";
+	status = "okay";
+};
+
+&ohci1 {
+	status = "okay";
+};
+
 &pinctrl {
 	audio_clock_pins: audio-clock {
 		pins = "AUDIO_CLK1", "AUDIO_CLK2";
@@ -207,6 +230,27 @@ ssi3_pins: ssi3 {
 			 <RZG2L_PORT_PINMUX(18, 4, 8)>, /* TXD */
 			 <RZG2L_PORT_PINMUX(18, 5, 8)>; /* RXD */
 	};
+
+	usb0_pins: usb0 {
+		peri {
+			pinmux = <RZG2L_PORT_PINMUX(5, 0, 1)>, /* VBUS */
+				 <RZG2L_PORT_PINMUX(5, 2, 1)>; /* OVC */
+		};
+
+		otg {
+			pinmux = <RZG2L_PORT_PINMUX(5, 3, 1)>; /* OTG_ID */
+			bias-pull-up;
+		};
+	};
+
+	usb1_pins: usb1 {
+		pinmux = <RZG2L_PORT_PINMUX(5, 4, 5)>, /* OVC */
+			 <RZG2L_PORT_PINMUX(6, 0, 1)>; /* VBUS */
+	};
+};
+
+&phyrst {
+	status = "okay";
 };
 
 &scif0 {
@@ -242,3 +286,16 @@ &ssi3 {
 	pinctrl-0 = <&ssi3_pins>, <&audio_clock_pins>;
 	status = "okay";
 };
+
+&usb2_phy0 {
+	pinctrl-0 = <&usb0_pins>;
+	pinctrl-names = "default";
+	vbus-supply = <&usb0_vbus_otg>;
+	status = "okay";
+};
+
+&usb2_phy1 {
+	pinctrl-0 = <&usb1_pins>;
+	pinctrl-names = "default";
+	status = "okay";
+};
-- 
2.43.0

RE: [PATCH v5 2/7] phy: renesas: rcar-gen3-usb2: Fix an error handling path in rcar_gen3_phy_usb2_probe()

[Biju Das]

Hi Claudiu, Christophe,

Thanks for the patch.

> -----Original Message-----
> From: Claudiu <claudiu.beznea@tuxon.dev>
> Sent: 19 August 2025 06:42
> Subject: [PATCH v5 2/7] phy: renesas: rcar-gen3-usb2: Fix an error handling path in
> rcar_gen3_phy_usb2_probe()
> 
> From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
> 
> If an error occurs after the reset_control_deassert(),
> reset_control_assert() must be called, as already done in the remove function.
> 
> Use devm_add_action_or_reset() to add the missing call and simplify the
> .remove() function accordingly.
> 
> Fixes: 4eae16375357 ("phy: renesas: rcar-gen3-usb2: Add support to initialize the bus")
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
> Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
> [claudiu.beznea: removed "struct reset_control *rstc = data;" from  rcar_gen3_reset_assert()]
> Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
> ---
> 
> Changes in v5:
> - none
> 
> Changes in v4:
> - none
> 
> Changes in v3:
> - collected tags
> 
> Changes in v2:
> - none; this patch is new; re-spinned the Christophe's work at
> 
> https://lore.kernel.org/all/TYCPR01MB113329930BA5E2149C9BE2A1986672@TYCPR01MB11332.jpnprd01.prod.outloo
> k.com/
> 
> 
>  drivers/phy/renesas/phy-rcar-gen3-usb2.c | 11 ++++++++++-
>  1 file changed, 10 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/phy/renesas/phy-rcar-gen3-usb2.c b/drivers/phy/renesas/phy-rcar-gen3-usb2.c
> index 47beb94cd424..d61c171d454f 100644
> --- a/drivers/phy/renesas/phy-rcar-gen3-usb2.c
> +++ b/drivers/phy/renesas/phy-rcar-gen3-usb2.c
> @@ -699,6 +699,11 @@ static enum usb_dr_mode rcar_gen3_get_dr_mode(struct device_node *np)
>  	return candidate;
>  }
> 
> +static void rcar_gen3_reset_assert(void *data) {
> +	reset_control_assert(data);
> +}
> +
>  static int rcar_gen3_phy_usb2_init_bus(struct rcar_gen3_chan *channel)  {
>  	struct device *dev = channel->dev;
> @@ -717,6 +722,11 @@ static int rcar_gen3_phy_usb2_init_bus(struct rcar_gen3_chan *channel)
>  	if (ret)
>  		goto rpm_put;
> 
> +	ret = devm_add_action_or_reset(dev, rcar_gen3_reset_assert,
> +				       channel->rstc);

Now 'rstc' can be removed from struct rcar_gen3_chan and use the local rstc pointer
as context variable here.

Cheers,
Biju

> +	if (ret)
> +		goto rpm_put;
> +
>  	val = readl(channel->base + USB2_AHB_BUS_CTR);
>  	val &= ~USB2_AHB_BUS_CTR_MBL_MASK;
>  	val |= USB2_AHB_BUS_CTR_MBL_INCR4;
> @@ -860,7 +870,6 @@ static void rcar_gen3_phy_usb2_remove(struct platform_device *pdev)
>  	if (channel->is_otg_channel)
>  		device_remove_file(&pdev->dev, &dev_attr_role);
> 
> -	reset_control_assert(channel->rstc);
>  	pm_runtime_disable(&pdev->dev);
>  };
> 
> --
> 2.43.0

Re: [PATCH v5 2/7] phy: renesas: rcar-gen3-usb2: Fix an error handling path in rcar_gen3_phy_usb2_probe()

[claudiu beznea]

Hi, Biju,

On 8/19/25 08:49, Biju Das wrote:
> Hi Claudiu, Christophe,
> 
> Thanks for the patch.
> 
>> -----Original Message-----
>> From: Claudiu <claudiu.beznea@tuxon.dev>
>> Sent: 19 August 2025 06:42
>> Subject: [PATCH v5 2/7] phy: renesas: rcar-gen3-usb2: Fix an error handling path in
>> rcar_gen3_phy_usb2_probe()
>>
>> From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
>>
>> If an error occurs after the reset_control_deassert(),
>> reset_control_assert() must be called, as already done in the remove function.
>>
>> Use devm_add_action_or_reset() to add the missing call and simplify the
>> .remove() function accordingly.
>>
>> Fixes: 4eae16375357 ("phy: renesas: rcar-gen3-usb2: Add support to initialize the bus")
>> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
>> Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
>> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
>> [claudiu.beznea: removed "struct reset_control *rstc = data;" from  rcar_gen3_reset_assert()]
>> Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
>> ---
>>
>> Changes in v5:
>> - none
>>
>> Changes in v4:
>> - none
>>
>> Changes in v3:
>> - collected tags
>>
>> Changes in v2:
>> - none; this patch is new; re-spinned the Christophe's work at
>>
>> https://lore.kernel.org/all/TYCPR01MB113329930BA5E2149C9BE2A1986672@TYCPR01MB11332.jpnprd01.prod.outloo
>> k.com/
>>
>>
>>   drivers/phy/renesas/phy-rcar-gen3-usb2.c | 11 ++++++++++-
>>   1 file changed, 10 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/phy/renesas/phy-rcar-gen3-usb2.c b/drivers/phy/renesas/phy-rcar-gen3-usb2.c
>> index 47beb94cd424..d61c171d454f 100644
>> --- a/drivers/phy/renesas/phy-rcar-gen3-usb2.c
>> +++ b/drivers/phy/renesas/phy-rcar-gen3-usb2.c
>> @@ -699,6 +699,11 @@ static enum usb_dr_mode rcar_gen3_get_dr_mode(struct device_node *np)
>>   	return candidate;
>>   }
>>
>> +static void rcar_gen3_reset_assert(void *data) {
>> +	reset_control_assert(data);
>> +}
>> +
>>   static int rcar_gen3_phy_usb2_init_bus(struct rcar_gen3_chan *channel)  {
>>   	struct device *dev = channel->dev;
>> @@ -717,6 +722,11 @@ static int rcar_gen3_phy_usb2_init_bus(struct rcar_gen3_chan *channel)
>>   	if (ret)
>>   		goto rpm_put;
>>
>> +	ret = devm_add_action_or_reset(dev, rcar_gen3_reset_assert,
>> +				       channel->rstc);
> 
> Now 'rstc' can be removed from struct rcar_gen3_chan and use the local rstc pointer
> as context variable here.

I can drop it now but it will be added later (after this series) along with 
suspend to RAM support. That is the reason I preferred to still keep it.

Thank you,
Claudiu

> 
> Cheers,
> Biju
> 
>> +	if (ret)
>> +		goto rpm_put;
>> +
>>   	val = readl(channel->base + USB2_AHB_BUS_CTR);
>>   	val &= ~USB2_AHB_BUS_CTR_MBL_MASK;
>>   	val |= USB2_AHB_BUS_CTR_MBL_INCR4;
>> @@ -860,7 +870,6 @@ static void rcar_gen3_phy_usb2_remove(struct platform_device *pdev)
>>   	if (channel->is_otg_channel)
>>   		device_remove_file(&pdev->dev, &dev_attr_role);
>>
>> -	reset_control_assert(channel->rstc);
>>   	pm_runtime_disable(&pdev->dev);
>>   };
>>
>> --
>> 2.43.0
> 

Re: [PATCH v5 1/7] dt-bindings: phy: renesas,usb2-phy: Mark resets as required for RZ/G3S

[Rob Herring (Arm)]

On Tue, 19 Aug 2025 08:42:06 +0300, Claudiu wrote:
> From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
> 
> The reset lines are mandatory for the Renesas RZ/G3S platform and must be
> explicitly defined in device tree.
> 
> Fixes: f3c849855114 ("dt-bindings: phy: renesas,usb2-phy: Document RZ/G3S phy bindings")
> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
> Acked-by: Conor Dooley <conor.dooley@microchip.com>
> Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
> ---
> 
> Changes in v5:
> - none
> 
> Changes in v4:
> - none
> 
> Changes in v3:
> - collected tags
> - rebased on top of latest version of renesas,usb2-phy.yaml;
>   Conor, Geert: I kept your tags; please let me know if you consider it
>   otherwise
> 
> Changes in v2:
> - none; this patch is new
> 
>  Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml | 1 +
>  1 file changed, 1 insertion(+)
> 

My bot found errors running 'make dt_binding_check' on your patch:

yamllint warnings/errors:

dtschema/dtc warnings/errors:


doc reference errors (make refcheckdocs):

See https://patchwork.ozlabs.org/project/devicetree-bindings/patch/20250819054212.486426-2-claudiu.beznea.uj@bp.renesas.com

The base for the series is generally the latest rc1. A different dependency
should be noted in *this* patch.

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 after running the above command yourself. Note
that DT_SCHEMA_FILES can be set to your schema file to speed up checking
your schema. However, it must be unset to test all examples with your schema.

Re: [PATCH v5 3/7] dt-bindings: reset: renesas,rzg2l-usbphy-ctrl: Document RZ/G3S support

[Rob Herring (Arm)]

On Tue, 19 Aug 2025 08:42:08 +0300, Claudiu wrote:
> From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
> 
> The Renesas USB PHY hardware block needs to have the PWRRDY bit in the
> system controller set before applying any other settings. The PWRRDY bit
> must be controlled during power-on, power-off, and system suspend/resume
> sequences as follows:
> - during power-on/resume, it must be set to zero before enabling clocks and
>   modules
> - during power-off/suspend, it must be set to one after disabling clocks
>   and modules
> 
> Add the renesas,sysc-pwrrdy device tree property, which allows the
> reset-rzg2l-usbphy-ctrl driver to parse, map, and control the system
> controller PWRRDY bit at the appropriate time. Along with it add a new
> compatible for the RZ/G3S SoC.
> 
> Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
> Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
> ---
> 
> Changes in v5:
> - fixed description formatting
> - collected tags
> 
> Changes in v4:
> - dropped blank line from compatible section
> - s/renesas,sysc-signals/renesas,sysc-pwrrdy/g
> - dropped description from renesas,sysc-pwrrdy
> - updated description of renesas,sysc-pwrrdy items
> - updated patch description
> 
> Changes in v3:
> - none; this patch is new
> 
>  .../reset/renesas,rzg2l-usbphy-ctrl.yaml      | 41 ++++++++++++++++---
>  1 file changed, 35 insertions(+), 6 deletions(-)
> 

My bot found errors running 'make dt_binding_check' on your patch:

yamllint warnings/errors:

dtschema/dtc warnings/errors:


doc reference errors (make refcheckdocs):

See https://patchwork.ozlabs.org/project/devicetree-bindings/patch/20250819054212.486426-4-claudiu.beznea.uj@bp.renesas.com

The base for the series is generally the latest rc1. A different dependency
should be noted in *this* patch.

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 after running the above command yourself. Note
that DT_SCHEMA_FILES can be set to your schema file to speed up checking
your schema. However, it must be unset to test all examples with your schema.

RE: [PATCH v5 2/7] phy: renesas: rcar-gen3-usb2: Fix an error handling path in rcar_gen3_phy_usb2_probe()

[Biju Das]

Hi Claudiu,

> -----Original Message-----
> From: claudiu beznea <claudiu.beznea@tuxon.dev>
> Sent: 19 August 2025 07:01
> Subject: Re: [PATCH v5 2/7] phy: renesas: rcar-gen3-usb2: Fix an error handling path in
> rcar_gen3_phy_usb2_probe()
> 
> Hi, Biju,
> 
> On 8/19/25 08:49, Biju Das wrote:
> > Hi Claudiu, Christophe,
> >
> > Thanks for the patch.
> >
> >> -----Original Message-----
> >> From: Claudiu <claudiu.beznea@tuxon.dev>
> >> Sent: 19 August 2025 06:42
> >> Subject: [PATCH v5 2/7] phy: renesas: rcar-gen3-usb2: Fix an error
> >> handling path in
> >> rcar_gen3_phy_usb2_probe()
> >>
> >> From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
> >>
> >> If an error occurs after the reset_control_deassert(),
> >> reset_control_assert() must be called, as already done in the remove function.
> >>
> >> Use devm_add_action_or_reset() to add the missing call and simplify
> >> the
> >> .remove() function accordingly.
> >>
> >> Fixes: 4eae16375357 ("phy: renesas: rcar-gen3-usb2: Add support to
> >> initialize the bus")
> >> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
> >> Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
> >> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
> >> [claudiu.beznea: removed "struct reset_control *rstc = data;" from
> >> rcar_gen3_reset_assert()]
> >> Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
> >> ---
> >>
> >> Changes in v5:
> >> - none
> >>
> >> Changes in v4:
> >> - none
> >>
> >> Changes in v3:
> >> - collected tags
> >>
> >> Changes in v2:
> >> - none; this patch is new; re-spinned the Christophe's work at
> >>
> >> https://lore.kernel.org/all/TYCPR01MB113329930BA5E2149C9BE2A1986672@T
> >> YCPR01MB11332.jpnprd01.prod.outloo
> >> k.com/
> >>
> >>
> >>   drivers/phy/renesas/phy-rcar-gen3-usb2.c | 11 ++++++++++-
> >>   1 file changed, 10 insertions(+), 1 deletion(-)
> >>
> >> diff --git a/drivers/phy/renesas/phy-rcar-gen3-usb2.c
> >> b/drivers/phy/renesas/phy-rcar-gen3-usb2.c
> >> index 47beb94cd424..d61c171d454f 100644
> >> --- a/drivers/phy/renesas/phy-rcar-gen3-usb2.c
> >> +++ b/drivers/phy/renesas/phy-rcar-gen3-usb2.c
> >> @@ -699,6 +699,11 @@ static enum usb_dr_mode rcar_gen3_get_dr_mode(struct device_node *np)
> >>   	return candidate;
> >>   }
> >>
> >> +static void rcar_gen3_reset_assert(void *data) {
> >> +	reset_control_assert(data);
> >> +}
> >> +
> >>   static int rcar_gen3_phy_usb2_init_bus(struct rcar_gen3_chan *channel)  {
> >>   	struct device *dev = channel->dev; @@ -717,6 +722,11 @@ static int
> >> rcar_gen3_phy_usb2_init_bus(struct rcar_gen3_chan *channel)
> >>   	if (ret)
> >>   		goto rpm_put;
> >>
> >> +	ret = devm_add_action_or_reset(dev, rcar_gen3_reset_assert,
> >> +				       channel->rstc);
> >
> > Now 'rstc' can be removed from struct rcar_gen3_chan and use the local
> > rstc pointer as context variable here.
> 
> I can drop it now but it will be added later (after this series) along with suspend to RAM support.
> That is the reason I preferred to still keep it.

There is a fixes tag which will be propagated to stable kernel. 
If you don't have any plan to send new series, then it is OK I guess??

Cheers,
Biju

Re: [PATCH v5 1/7] dt-bindings: phy: renesas,usb2-phy: Mark resets as required for RZ/G3S

[Rob Herring]

On Tue, Aug 19, 2025 at 01:29:17AM -0500, Rob Herring (Arm) wrote:
> 
> On Tue, 19 Aug 2025 08:42:06 +0300, Claudiu wrote:
> > From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
> > 
> > The reset lines are mandatory for the Renesas RZ/G3S platform and must be
> > explicitly defined in device tree.
> > 
> > Fixes: f3c849855114 ("dt-bindings: phy: renesas,usb2-phy: Document RZ/G3S phy bindings")
> > Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
> > Acked-by: Conor Dooley <conor.dooley@microchip.com>
> > Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
> > ---
> > 
> > Changes in v5:
> > - none
> > 
> > Changes in v4:
> > - none
> > 
> > Changes in v3:
> > - collected tags
> > - rebased on top of latest version of renesas,usb2-phy.yaml;
> >   Conor, Geert: I kept your tags; please let me know if you consider it
> >   otherwise
> > 
> > Changes in v2:
> > - none; this patch is new
> > 
> >  Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml | 1 +
> >  1 file changed, 1 insertion(+)
> > 
> 
> My bot found errors running 'make dt_binding_check' on your patch:
> 
> yamllint warnings/errors:
> 
> dtschema/dtc warnings/errors:
> 
> 
> doc reference errors (make refcheckdocs):
> 
> See https://patchwork.ozlabs.org/project/devicetree-bindings/patch/20250819054212.486426-2-claudiu.beznea.uj@bp.renesas.com

No issue here. The QCom folks have broken "make dt_binding_check" in 
linux-next...

Rob

Re: [PATCH v5 1/7] dt-bindings: phy: renesas,usb2-phy: Mark resets as required for RZ/G3S

[claudiu beznea]

Hi, Rob,

On 8/19/25 16:37, Rob Herring wrote:
> On Tue, Aug 19, 2025 at 01:29:17AM -0500, Rob Herring (Arm) wrote:
>>
>> On Tue, 19 Aug 2025 08:42:06 +0300, Claudiu wrote:
>>> From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
>>>
>>> The reset lines are mandatory for the Renesas RZ/G3S platform and must be
>>> explicitly defined in device tree.
>>>
>>> Fixes: f3c849855114 ("dt-bindings: phy: renesas,usb2-phy: Document RZ/G3S phy bindings")
>>> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
>>> Acked-by: Conor Dooley <conor.dooley@microchip.com>
>>> Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
>>> ---
>>>
>>> Changes in v5:
>>> - none
>>>
>>> Changes in v4:
>>> - none
>>>
>>> Changes in v3:
>>> - collected tags
>>> - rebased on top of latest version of renesas,usb2-phy.yaml;
>>>    Conor, Geert: I kept your tags; please let me know if you consider it
>>>    otherwise
>>>
>>> Changes in v2:
>>> - none; this patch is new
>>>
>>>   Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml | 1 +
>>>   1 file changed, 1 insertion(+)
>>>
>>
>> My bot found errors running 'make dt_binding_check' on your patch:
>>
>> yamllint warnings/errors:
>>
>> dtschema/dtc warnings/errors:
>>
>>
>> doc reference errors (make refcheckdocs):
>>
>> See https://patchwork.ozlabs.org/project/devicetree-bindings/patch/20250819054212.486426-2-claudiu.beznea.uj@bp.renesas.com
> 
> No issue here. The QCom folks have broken "make dt_binding_check" in
> linux-next...

Is patch 3/7 in this series still good? I can't find any issue with it locally.

Thank you,
Claudiu

Re: [PATCH v5 0/7] Add initial USB support for the Renesas RZ/G3S SoC

[Wolfram Sang]

Hi Claudiu,

> Series adds initial USB support for the Renesas RZ/G3S SoC.
> 
> Series is split as follows:
> - patches 1-2/7		- fixes on bindings and driver for USB PHY
> - patches 3-5/7		- updates the rzg2l-usbphy-ctrl driver and documentation
> 			  with support for setting PWRRDY though SYSC
> - patches 6-7/7		- add device tree support

Can you kindly send me a working config (privately will do). I think I
enabled all the necessary config options but still get:

[    0.271024] rzg2l_usbphy_ctrl 11e00000.usbphy-ctrl: probe with driver rzg2l_usbphy_ctrl failed with error -22
...
[   10.981612] platform 11e20000.usb: deferred probe pending: platform: supplier 11e10200.usb-phy not ready
[   10.984103] platform 11e10200.usb-phy: deferred probe pending: platform: wait for supplier /soc/usbphy-ctrl@11e00000/regulator-vbus

Thanks,

   Wolfram

Re: [PATCH v5 0/7] Add initial USB support for the Renesas RZ/G3S SoC

[claudiu beznea]

Hi, Wolfram,

On 8/28/25 11:56, Wolfram Sang wrote:
> Hi Claudiu,
> 
>> Series adds initial USB support for the Renesas RZ/G3S SoC.
>>
>> Series is split as follows:
>> - patches 1-2/7		- fixes on bindings and driver for USB PHY
>> - patches 3-5/7		- updates the rzg2l-usbphy-ctrl driver and documentation
>> 			  with support for setting PWRRDY though SYSC
>> - patches 6-7/7		- add device tree support
> 
> Can you kindly send me a working config (privately will do). I think I
> enabled all the necessary config options but still get:
> 
> [    0.271024] rzg2l_usbphy_ctrl 11e00000.usbphy-ctrl: probe with driver rzg2l_usbphy_ctrl failed with error -22
> ...
> [   10.981612] platform 11e20000.usb: deferred probe pending: platform: supplier 11e10200.usb-phy not ready
> [   10.984103] platform 11e10200.usb-phy: deferred probe pending: platform: wait for supplier /soc/usbphy-ctrl@11e00000/regulator-vbus

I just checked it on latest linux-next and all good on my side. Would it be 
possible that you don't have commit 2da2740fb9c8 ("soc: renesas: rz-sysc: Add 
syscon/regmap support") in your tree?

This is how my tree looks like:

1db69bbb9c49 (HEAD) arm64: dts: renesas: rzg3s-smarc: Enable USB support
ee93ed9f0097 arm64: dts: renesas: r9a08g045: Add USB support
285447f934f3 reset: rzg2l-usbphy-ctrl: Add support for RZ/G3S SoC
8c758908876c reset: rzg2l-usbphy-ctrl: Add support for USB PWRRDY
8e41c54ab567 dt-bindings: reset: renesas,rzg2l-usbphy-ctrl: Document RZ/G3S support
02db7a65b4b3 phy: renesas: rcar-gen3-usb2: Fix an error handling path in 
rcar_gen3_phy_usb2_probe()
217453b58bdf dt-bindings: phy: renesas,usb2-phy: Mark resets as required for RZ/G3S
0f4c93f7eb86 (tag: next-20250822, linux-next/master) Add linux-next specific 
files for 20250822

and few checks on my board:

root@smarc-rzg3s:~# uname -r
6.17.0-rc2-next-20250822-00007-g1db69bbb9c49
root@smarc-rzg3s:~# [  217.627804] usb 1-1.2: USB disconnect, device number 4
[  217.627804] usb 1-1.2: USB disconnect, device number 4

root@smarc-rzg3s:~#
root@smarc-rzg3s:~#
root@smarc-rzg3s:~#
root@smarc-rzg3s:~# lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 045b:022b Hitachi, Ltd
Bus 001 Device 003: ID 8087:0029 Intel Corp. AX200 Bluetooth
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
root@smarc-rzg3s:~# [  231.154575] usb 1-1.2: new high-speed USB device number 5 
using ehci-platform
[  231.154575] usb 1-1.2: new high-speed USB device number 5 using ehci-platform
[  231.299629] usb-storage 1-1.2:1.0: USB Mass Storage device detected
[  231.299629] usb-storage 1-1.2:1.0: USB Mass Storage device detected
[  231.327087] scsi host0: usb-storage 1-1.2:1.0
[  231.327087] scsi host0: usb-storage 1-1.2:1.0
[  232.348676] scsi 0:0:0:0: Direct-Access     SanDisk  Cruzer Blade     1.00 
PQ: 0 ANSI: 6
[  232.348676] scsi 0:0:0:0: Direct-Access     SanDisk  Cruzer Blade     1.00 
PQ: 0 ANSI: 6
[  232.382829] sd 0:0:0:0: [sda] 31260672 512-byte logical blocks: (16.0 GB/14.9 
GiB)
[  232.382829] sd 0:0:0:0: [sda] 31260672 512-byte logical blocks: (16.0 GB/14.9 
GiB)
[  232.417118] sd 0:0:0:0: [sda] Write Protect is off
[  232.417118] sd 0:0:0:0: [sda] Write Protect is off
[  232.430023] sd 0:0:0:0: [sda] Write cache: disabled, read cache: enabled, 
doesn't support DPO or FUA
[  232.430023] sd 0:0:0:0: [sda] Write cache: disabled, read cache: enabled, 
doesn't support DPO or FUA
[  232.481535]  sda: sda1
[  232.481535]  sda: sda1
[  232.490719] sd 0:0:0:0: [sda] Attached SCSI removable disk
[  232.490719] sd 0:0:0:0: [sda] Attached SCSI removable disk

root@smarc-rzg3s:~#
root@smarc-rzg3s:~#
root@smarc-rzg3s:~# lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 045b:022b Hitachi, Ltd
Bus 001 Device 003: ID 8087:0029 Intel Corp. AX200 Bluetooth
Bus 001 Device 005: ID 0781:5567 SanDisk Corp. Cruzer Blade
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
root@smarc-rzg3s:~#
root@smarc-rzg3s:~#

Thank you for looking to this,
Claudiu

> 
> Thanks,
> 
>     Wolfram
> 

Re: [PATCH v5 0/7] Add initial USB support for the Renesas RZ/G3S SoC

[Wolfram Sang]

Hi Claudiu,

> I just checked it on latest linux-next and all good on my side. Would it be
> possible that you don't have commit 2da2740fb9c8 ("soc: renesas: rz-sysc:
> Add syscon/regmap support") in your tree?

Yes, I added it and it made the error go away, but still no USB. I
switched to linux-next as of today, did neither help.

> This is how my tree looks like:

Mine is similar, except for a newer -next.

Let's try your config file next?

Thanks for the support,

   Wolfram

Re: [PATCH v5 0/7] Add initial USB support for the Renesas RZ/G3S SoC

[claudiu beznea]

Hi, Wolfram,

On 8/29/25 13:53, Wolfram Sang wrote:
> Hi Claudiu,
> 
>> I just checked it on latest linux-next and all good on my side. Would it be
>> possible that you don't have commit 2da2740fb9c8 ("soc: renesas: rz-sysc:
>> Add syscon/regmap support") in your tree?
> 
> Yes, I added it and it made the error go away, but still no USB. I

The drivers are not probed or you see no activity when connecting USB devices?

> switched to linux-next as of today, did neither help.
> 
>> This is how my tree looks like:
> 
> Mine is similar, except for a newer -next.
> 
> Let's try your config file next?

I used arm64 defconfig (arch/arm64/configs/defconfig).

Thank you,
Claudiu

Re: [PATCH v5 0/7] Add initial USB support for the Renesas RZ/G3S SoC

[Wolfram Sang]

> > Yes, I added it and it made the error go away, but still no USB. I
> 
> The drivers are not probed or you see no activity when connecting USB devices?

Sigh, I was so sure to have checked OHCI/EHCI but only EHCI was enabled :(

Checking with the schematics, I get it that only the rightmost USB-A
connectors on the carrier board are routed. Those two work fine now.

If that is to be expected, then for the whole series:

Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>

Re: [PATCH v5 0/7] Add initial USB support for the Renesas RZ/G3S SoC

[claudiu beznea]

On 8/29/25 14:51, Wolfram Sang wrote:
> 
>>> Yes, I added it and it made the error go away, but still no USB. I
>>
>> The drivers are not probed or you see no activity when connecting USB devices?
> 
> Sigh, I was so sure to have checked OHCI/EHCI but only EHCI was enabled :(
> 
> Checking with the schematics, I get it that only the rightmost USB-A
> connectors on the carrier board are routed. Those two work fine now.
> 
> If that is to be expected, then for the whole series:

Yes, only those 2 are routed on RZ SMARC Carrier II + RZ/G3S SMARC Module.

> 
> Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
> 

Thank you for doing this,
Claudiu

Re: [PATCH v5 4/7] reset: rzg2l-usbphy-ctrl: Add support for USB PWRRDY

[Claudiu Beznea]

Hi,

Just a gentle ping for this patch and the series in general.

(For whatever reason the cover letter didn't land in my inbox so I replied
to this patch. Appologies for any inconvenience).

Thank you,
Claudiu

On 19.08.2025 08:42, Claudiu wrote:
> From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
> 
> On the Renesas RZ/G3S SoC, the USB PHY block has an input signal called
> PWRRDY. This signal is managed by the system controller and must be
> de-asserted after powering on the area where USB PHY resides and asserted
> before powering it off.
> 
> On power-on the USB PWRRDY signal need to be de-asserted before enabling
> clock and switching the module to normal state (through MSTOP support). The
> power-on configuration sequence must be:
> 
> 1/ PWRRDY=0
> 2/ CLK_ON=1
> 3/ MSTOP=0
> 
> On power-off the configuration sequence should be:
> 
> 1/ MSTOP=1
> 2/ CLK_ON=0
> 3/ PWRRDY=1
> 
> The CLK_ON and MSTOP functionalities are controlled by clock drivers.
> 
> After long discussions with the internal HW team, it has been confirmed
> that the HW connection b/w USB PHY block, the USB channels, the system
> controller, clock, MSTOP, PWRRDY signal is as follows:
> 
>                                ┌──────────────────────────────┐
>                                │                              │◄── CPG_CLKON_USB.CLK0_ON
>                                │     USB CH0                  │
> ┌──────────────────────────┐   │┌───────────────────────────┐ │◄── CPG_CLKON_USB.CLK2_ON
> │                 ┌────────┐   ││host controller registers  │ │
> │                 │        │   ││function controller registers│
> │                 │ PHY0   │◄──┤└───────────────────────────┘ │
> │     USB PHY     │        │   └────────────▲─────────────────┘
> │                 └────────┘                │
> │                          │    CPG_BUS_PERI_COM_MSTOP.MSTOP{6, 5}_ON
> │┌──────────────┐ ┌────────┐
> ││USHPHY control│ │        │
> ││  registers   │ │ PHY1   │   ┌──────────────────────────────┐
> │└──────────────┘ │        │◄──┤     USB CH1                  │
> │                 └────────┘   │┌───────────────────────────┐ │◄── CPG_CLKON_USB.CLK1_ON
> └─▲───────▲─────────▲──────┘   ││ host controller registers │ │
>   │       │         │          │└───────────────────────────┘ │
>   │       │         │          └────────────▲─────────────────┘
>   │       │         │                       │
>   │       │         │           CPG_BUS_PERI_COM_MSTOP.MSTOP7_ON
>   │PWRRDY │         │
>   │       │   CPG_CLK_ON_USB.CLK3_ON
>   │       │
>   │  CPG_BUS_PERI_COM_MSTOP.MSTOP4_ON
>   │
> ┌────┐
> │SYSC│
> └────┘
> 
> where:
> - CPG_CLKON_USB.CLK.CLKX_ON is the register bit controlling the clock X
>   of different USB blocks, X in {0, 1, 2, 3}
> - CPG_BUS_PERI_COM_MSTOP.MSTOPX_ON is the register bit controlling the
>   MSTOP of different USB blocks, X in {4, 5, 6, 7}
> - USB PHY is the USB PHY block exposing 2 ports, port0 and port1, used
>   by the USB CH0, USB CH1
> - SYSC is the system controller block controlling the PWRRDY signal
> - USB CHx are individual USB block with host and function capabilities
>   (USB CH0 have both host and function capabilities, USB CH1 has only
>   host capabilities)
> 
> The USBPHY control registers are controlled though the
> reset-rzg2l-usbphy-ctrl driver. The USB PHY ports are controlled by
> phy_rcar_gen3_usb2 (drivers/phy/renesas/phy-rcar-gen3-usb2.c file). The
> USB PHY ports request resets from the reset-rzg2l-usbphy-ctrl driver.
> 
> The connection b/w the system controller and the USB PHY CTRL driver is
> implemented through the renesas,sysc-pwrrdy device tree property
> proposed in this patch. This property specifies the register offset and the
> bitmask required to control the PWRRDY signal.
> 
> Since the USB PHY CTRL driver needs to be probed before any other
> USB-specific driver on RZ/G3S, control of PWRRDY is passed exclusively
> to it. This guarantees the correct configuration sequence between clocks,
> MSTOP bits, and the PWRRDY bit. At the same time, changes are kept minimal
> by avoiding modifications to the USB PHY driver to also handle the PWRRDY
> itself.
> 
> Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
> ---
> 
> Changes in v5:
> - none
> 
> Changes in v4:
> - updated patch description
> - updated rzg2l_usbphy_ctrl_pwrrdy_init() to map directly the
>   "renesas,sysc-pwrrdy" as the SYSC signal abstraction was dropped
>   in this version, along with rz_sysc_get_signal_map()
> - dropped priv member of rzg2l_usbphy_ctrl_pwrrdy_init() as it is
>   not needed in this version
> - shift left !power_on with pwrrdy->mask as this is how the
>   regmap_update_bits() needs the last member to be
> - selected MFD_SYSCON
> 
> Changes in v3:
> - none; this patch is new
> 
>  drivers/reset/Kconfig                   |  1 +
>  drivers/reset/reset-rzg2l-usbphy-ctrl.c | 66 +++++++++++++++++++++++++
>  2 files changed, 67 insertions(+)
> 
> diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig
> index 78b7078478d4..329730cbcfb9 100644
> --- a/drivers/reset/Kconfig
> +++ b/drivers/reset/Kconfig
> @@ -237,6 +237,7 @@ config RESET_RASPBERRYPI
>  config RESET_RZG2L_USBPHY_CTRL
>  	tristate "Renesas RZ/G2L USBPHY control driver"
>  	depends on ARCH_RZG2L || COMPILE_TEST
> +	select MFD_SYSCON
>  	help
>  	  Support for USBPHY Control found on RZ/G2L family. It mainly
>  	  controls reset and power down of the USB/PHY.
> diff --git a/drivers/reset/reset-rzg2l-usbphy-ctrl.c b/drivers/reset/reset-rzg2l-usbphy-ctrl.c
> index 8a7f167e405e..3856072b23a3 100644
> --- a/drivers/reset/reset-rzg2l-usbphy-ctrl.c
> +++ b/drivers/reset/reset-rzg2l-usbphy-ctrl.c
> @@ -13,6 +13,7 @@
>  #include <linux/regmap.h>
>  #include <linux/reset.h>
>  #include <linux/reset-controller.h>
> +#include <linux/mfd/syscon.h>
>  
>  #define RESET			0x000
>  #define VBENCTL			0x03c
> @@ -41,6 +42,18 @@ struct rzg2l_usbphy_ctrl_priv {
>  
>  #define rcdev_to_priv(x)	container_of(x, struct rzg2l_usbphy_ctrl_priv, rcdev)
>  
> +/**
> + * struct rzg2l_usbphy_ctrl_pwrrdy - SYSC PWRRDY signal descriptor
> + * @regmap: SYSC regmap
> + * @offset: offset into the SYSC address space for accessing PWRRDY
> + * @mask: mask into the register at offset for accessing PWRRDY
> + */
> +struct rzg2l_usbphy_ctrl_pwrrdy {
> +	struct regmap *regmap;
> +	u32 offset;
> +	u32 mask;
> +};
> +
>  static int rzg2l_usbphy_ctrl_assert(struct reset_controller_dev *rcdev,
>  				    unsigned long id)
>  {
> @@ -91,6 +104,8 @@ static int rzg2l_usbphy_ctrl_status(struct reset_controller_dev *rcdev,
>  	return !!(readl(priv->base + RESET) & port_mask);
>  }
>  
> +#define RZG2L_USBPHY_CTRL_PWRRDY	1
> +
>  static const struct of_device_id rzg2l_usbphy_ctrl_match_table[] = {
>  	{ .compatible = "renesas,rzg2l-usbphy-ctrl" },
>  	{ /* Sentinel */ }
> @@ -110,6 +125,53 @@ static const struct regmap_config rzg2l_usb_regconf = {
>  	.max_register = 1,
>  };
>  
> +static void rzg2l_usbphy_ctrl_set_pwrrdy(struct rzg2l_usbphy_ctrl_pwrrdy *pwrrdy,
> +					 bool power_on)
> +{
> +	regmap_update_bits(pwrrdy->regmap, pwrrdy->offset, pwrrdy->mask,
> +			   !power_on << pwrrdy->mask);
> +}
> +
> +static void rzg2l_usbphy_ctrl_pwrrdy_off(void *data)
> +{
> +	rzg2l_usbphy_ctrl_set_pwrrdy(data, false);
> +}
> +
> +static int rzg2l_usbphy_ctrl_pwrrdy_init(struct device *dev)
> +{
> +	struct rzg2l_usbphy_ctrl_pwrrdy *pwrrdy;
> +	struct of_phandle_args args;
> +	struct regmap *regmap;
> +	const int *data;
> +	int ret;
> +
> +	data = device_get_match_data(dev);
> +	if (data != (int *)RZG2L_USBPHY_CTRL_PWRRDY)
> +		return 0;
> +
> +	ret = of_parse_phandle_with_fixed_args(dev->of_node, "renesas,sysc-pwrrdy", 2,
> +					       0, &args);
> +	if (ret)
> +		return ret;
> +
> +	regmap = syscon_node_to_regmap(args.np);
> +	of_node_put(args.np);
> +	if (IS_ERR(regmap))
> +		return PTR_ERR(regmap);
> +
> +	pwrrdy = devm_kzalloc(dev, sizeof(*pwrrdy), GFP_KERNEL);
> +	if (!pwrrdy)
> +		return -ENOMEM;
> +
> +	pwrrdy->regmap = regmap;
> +	pwrrdy->offset = args.args[0];
> +	pwrrdy->mask = args.args[1];
> +
> +	rzg2l_usbphy_ctrl_set_pwrrdy(pwrrdy, true);
> +
> +	return devm_add_action_or_reset(dev, rzg2l_usbphy_ctrl_pwrrdy_off, pwrrdy);
> +}
> +
>  static int rzg2l_usbphy_ctrl_probe(struct platform_device *pdev)
>  {
>  	struct device *dev = &pdev->dev;
> @@ -132,6 +194,10 @@ static int rzg2l_usbphy_ctrl_probe(struct platform_device *pdev)
>  	if (IS_ERR(regmap))
>  		return PTR_ERR(regmap);
>  
> +	error = rzg2l_usbphy_ctrl_pwrrdy_init(dev);
> +	if (error)
> +		return error;
> +
>  	priv->rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL);
>  	if (IS_ERR(priv->rstc))
>  		return dev_err_probe(dev, PTR_ERR(priv->rstc),