Add dummy regulator for USB and PHY supplies.

Add vbus regulator that is enabled by GPIO pin.

Signed-off-by: Pritam Manohar Sutar <pritam.sutar@samsung.com>
---
 .../boot/dts/exynos/exynosautov920-sadk.dts   | 139 ++++++++++++++++++
 1 file changed, 139 insertions(+)

diff --git a/arch/arm64/boot/dts/exynos/exynosautov920-sadk.dts b/arch/arm64/boot/dts/exynos/exynosautov920-sadk.dts
index a397f068ed53..f90f7704597c 100644
--- a/arch/arm64/boot/dts/exynos/exynosautov920-sadk.dts
+++ b/arch/arm64/boot/dts/exynos/exynosautov920-sadk.dts
@@ -52,6 +52,76 @@ memory@80000000 {
 		      <0x8 0x80000000 0x1 0xfba00000>,
 		      <0xa 0x00000000 0x2 0x00000000>;
 	};
+
+	/* TODO: Remove this once PMIC is implemented  */
+	dummy_regulator: regulator-0 {
+		 compatible = "regulator-fixed";
+		 regulator-name = "dummy_regulator";
+	};
+
+	usbdrd31_dwc3_vbus: usbdrd31_dwc3-vbus {
+	       compatible = "regulator-fixed";
+	       regulator-name = "usbdrd31_dwc3-vbus";
+	       regulator-min-microvolt = <5000000>;
+	       regulator-max-microvolt = <5000000>;
+	       enable-active-high;
+	       regulator-always-on;
+	       gpio = <&gpp2 0 GPIO_ACTIVE_HIGH>;
+	};
+
+	/* Use gpio for enabling vbus regulator */
+	usb_phy0: usb-phy0 {
+		compatible = "usb-nop-xceiv";
+		vbus-supply = <&usbdrd31_dwc3_vbus>;
+	};
+
+	usbdrd20_dwc3_0_vbus: usbdrd20_dwc3_0-vbus {
+	       compatible = "regulator-fixed";
+	       regulator-name = "usbdrd20_dwc3_0-vbus";
+	       regulator-min-microvolt = <5000000>;
+	       regulator-max-microvolt = <5000000>;
+	       enable-active-high;
+	       regulator-always-on;
+	       gpio = <&gpp2 1 GPIO_ACTIVE_HIGH>;
+	};
+
+	/* Use gpio for enabling vbus regulator */
+	usb_phy1: usb-phy1 {
+		compatible = "usb-nop-xceiv";
+		vbus-supply = <&usbdrd20_dwc3_0_vbus>;
+	};
+
+	usbdrd20_dwc3_1_vbus: usbdrd20_dwc3_1-vbus {
+	       compatible = "regulator-fixed";
+	       regulator-name = "usbdrd20_dwc3_1-vbus";
+	       regulator-min-microvolt = <5000000>;
+	       regulator-max-microvolt = <5000000>;
+	       enable-active-high;
+	       regulator-always-on;
+	       gpio = <&gpp2 2 GPIO_ACTIVE_HIGH>;
+	};
+
+	/* Use gpio for enabling vbus regulator */
+	usb_phy2: usb-phy2 {
+		compatible = "usb-nop-xceiv";
+		vbus-supply = <&usbdrd20_dwc3_1_vbus>;
+	};
+
+	usbdrd20_dwc3_2_vbus: usbdrd20_dwc3_2-vbus {
+	       compatible = "regulator-fixed";
+	       regulator-name = "usbdrd20_dwc3_2-vbus";
+	       regulator-min-microvolt = <5000000>;
+	       regulator-max-microvolt = <5000000>;
+	       enable-active-high;
+	       regulator-always-on;
+	       gpio = <&gpp2 3 GPIO_ACTIVE_HIGH>;
+	};
+
+	/* Use gpio for enabling vbus regulator */
+	usb_phy3: usb-phy3 {
+		compatible = "usb-nop-xceiv";
+		vbus-supply = <&usbdrd20_dwc3_2_vbus>;
+	};
 };
 
 &pinctrl_alive {
@@ -86,3 +156,72 @@ &usi_0 {
 &xtcxo {
 	clock-frequency = <38400000>;
 };
+
+&usbdrd31_ssphy {
+	dvdd-supply = <&dummy_regulator>;
+	vdd18-supply = <&dummy_regulator>;
+};
+
+&usbdrd31_hsphy {
+	dvdd-supply = <&dummy_regulator>;
+	vdd18-supply = <&dummy_regulator>;
+	vdd33-supply = <&dummy_regulator>;
+};
+
+&usbdrd31_dwc3 {
+	maximum-speed = "super-speed-plus";
+	usb-phy = <&usb_phy0>;
+};
+
+&usbdrd31 {
+	vdd10-supply = <&dummy_regulator>;
+	vdd33-supply = <&dummy_regulator>;
+};
+
+&usbdrd20_phy0 {
+	dvdd-supply = <&dummy_regulator>;
+	vdd18-supply = <&dummy_regulator>;
+	vdd33-supply = <&dummy_regulator>;
+};
+
+&usbdrd20_dwc3_0 {
+	maximum-speed = "high-speed";
+	usb-phy = <&usb_phy1>;
+};
+
+&usbdrd20_0 {
+	vdd10-supply = <&dummy_regulator>;
+	vdd33-supply = <&dummy_regulator>;
+};
+
+&usbdrd20_phy1 {
+	dvdd-supply = <&dummy_regulator>;
+	vdd18-supply = <&dummy_regulator>;
+	vdd33-supply = <&dummy_regulator>;
+};
+
+&usbdrd20_dwc3_1 {
+	maximum-speed = "high-speed";
+	usb-phy = <&usb_phy2>;
+};
+
+&usbdrd20_1 {
+	vdd10-supply = <&dummy_regulator>;
+	vdd33-supply = <&dummy_regulator>;
+};
+
+&usbdrd20_phy2 {
+	dvdd-supply = <&dummy_regulator>;
+	vdd18-supply = <&dummy_regulator>;
+	vdd33-supply = <&dummy_regulator>;
+};
+
+&usbdrd20_dwc3_2 {
+	maximum-speed = "high-speed";
+	usb-phy = <&usb_phy3>;
+};
+
+&usbdrd20_2 {
+	vdd10-supply = <&dummy_regulator>;
+	vdd33-supply = <&dummy_regulator>;
+};
-- 
2.34.1

On 22/01/2026 14:07, Pritam Manohar Sutar wrote:
> Add dummy regulator for USB and PHY supplies.
> 
> Add vbus regulator that is enabled by GPIO pin.
> 
> Signed-off-by: Pritam Manohar Sutar <pritam.sutar@samsung.com>
> ---
>  .../boot/dts/exynos/exynosautov920-sadk.dts   | 139 ++++++++++++++++++
>  1 file changed, 139 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/exynos/exynosautov920-sadk.dts b/arch/arm64/boot/dts/exynos/exynosautov920-sadk.dts
> index a397f068ed53..f90f7704597c 100644
> --- a/arch/arm64/boot/dts/exynos/exynosautov920-sadk.dts
> +++ b/arch/arm64/boot/dts/exynos/exynosautov920-sadk.dts
> @@ -52,6 +52,76 @@ memory@80000000 {
>  		      <0x8 0x80000000 0x1 0xfba00000>,
>  		      <0xa 0x00000000 0x2 0x00000000>;
>  	};
> +
> +	/* TODO: Remove this once PMIC is implemented  */
> +	dummy_regulator: regulator-0 {
> +		 compatible = "regulator-fixed";
> +		 regulator-name = "dummy_regulator";
> +	};
> +
> +	usbdrd31_dwc3_vbus: usbdrd31_dwc3-vbus {

Please use name for all fixed regulators which matches current format
recommendation: 'regulator-[0-9]v[0-9]'

https://web.git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/devicetree/bindings/regulator/fixed-regulator.yaml

None of the regulators are called like you wrote. Really NONE.

Also, carefully follow DTS coding style.

> +	       compatible = "regulator-fixed";
> +	       regulator-name = "usbdrd31_dwc3-vbus";
> +	       regulator-min-microvolt = <5000000>;
> +	       regulator-max-microvolt = <5000000>;
> +	       enable-active-high;
> +	       regulator-always-on;
> +	       gpio = <&gpp2 0 GPIO_ACTIVE_HIGH>;
> +	};
> +
> +	/* Use gpio for enabling vbus regulator */
> +	usb_phy0: usb-phy0 {

usb-phy-0

> +		compatible = "usb-nop-xceiv";
> +		vbus-supply = <&usbdrd31_dwc3_vbus>;

That's pretty incomplete. Why do you need such node - just to toggle
regulator?

> +	};

...

> +&usbdrd20_phy2 {
> +	dvdd-supply = <&dummy_regulator>;
> +	vdd18-supply = <&dummy_regulator>;
> +	vdd33-supply = <&dummy_regulator>;
> +};
> +
> +&usbdrd20_dwc3_2 {
> +	maximum-speed = "high-speed";
> +	usb-phy = <&usb_phy3>;
> +};
> +
> +&usbdrd20_2 {
> +	vdd10-supply = <&dummy_regulator>;
> +	vdd33-supply = <&dummy_regulator>;
> +};

That's a bit too much of dummies. This is heavily incomplete. You need
to bring back the PMIC first.


Best regards,
Krzysztof