Enable the DWC3 USB 3.0 controller and its associated usbphy2 on the
OrangePi RV2 board.

The board utilizes a Genesys Logic GL3523 hub, which requires one
separate power supplies for hub itself.

Define a 3.3v fixed voltage regulator to be used by PCIe on OPi RV2.

Define PCIe and PHY-related Device Tree nodes for the OPi RV2.

Signed-off-by: Han Gao <gaohan@iscas.ac.cn>
---
 .../boot/dts/spacemit/k1-orangepi-rv2.dts     | 79 +++++++++++++++++++
 1 file changed, 79 insertions(+)

diff --git a/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts b/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts
index 1b1b27bc95d8..a53cd2e037ef 100644
--- a/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts
@@ -23,6 +23,15 @@ chosen {
 		stdout-path = "serial0";
 	};
 
+	pcie_vcc_3v3: regulator-pcie-vcc3v3 {
+		compatible = "regulator-fixed";
+		regulator-name = "PCIE_VCC3V3";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		gpio = <&gpio K1_GPIO(116) GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+	};
+
 	reg_dc_in: regulator-vcc-in-5v {
 		compatible = "regulator-fixed";
 		regulator-name = "dc_in_5v";
@@ -42,6 +51,15 @@ reg_vcc_4v: regulator-vcc-4v {
 		vin-supply = <&reg_dc_in>;
 	};
 
+	usb3_hub_5v: regulator-usb3-hub-5v {
+		compatible = "regulator-fixed";
+		regulator-name = "USB_HUB_EN";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		gpio = <&gpio K1_GPIO(123) GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+	};
+
 	leds {
 		compatible = "gpio-leds";
 
@@ -54,6 +72,10 @@ led1 {
 	};
 };
 
+&combo_phy {
+	status = "okay";
+};
+
 &eth0 {
 	phy-handle = <&rgmii0>;
 	phy-mode = "rgmii-id";
@@ -230,8 +252,65 @@ dldo7 {
 	};
 };
 
+&pcie1_phy {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pcie1_3_cfg>;
+	status = "okay";
+};
+
+&pcie1_port {
+	phys = <&pcie1_phy>;
+	vpcie3v3-supply = <&pcie_vcc_3v3>;
+};
+
+&pcie1 {
+	vpcie3v3-supply = <&pcie_vcc_3v3>;
+	status = "okay";
+};
+
+&pcie2_phy {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pcie2_4_cfg>;
+	status = "okay";
+};
+
+&pcie2_port {
+	phys = <&pcie2_phy>;
+	vpcie3v3-supply = <&pcie_vcc_3v3>;
+};
+
+&pcie2 {
+	vpcie3v3-supply = <&pcie_vcc_3v3>;
+	status = "okay";
+};
+
 &uart0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart0_2_cfg>;
 	status = "okay";
 };
+
+&usbphy2 {
+	status = "okay";
+};
+
+&usb_dwc3 {
+	dr_mode = "host";
+	#address-cells = <1>;
+	#size-cells = <0>;
+	status = "okay";
+
+	hub_2_0: hub@1 {
+		compatible = "usb5e3,610";
+		reg = <0x1>;
+		vdd-supply = <&usb3_hub_5v>;
+		peer-hub = <&hub_3_0>;
+	};
+
+	hub_3_0: hub@2 {
+		compatible = "usb5e3,620";
+		reg = <0x2>;
+		vdd-supply = <&usb3_hub_5v>;
+		peer-hub = <&hub_2_0>;
+	};
+};
-- 
2.47.3

Hi,

> +	usb3_hub_5v: regulator-usb3-hub-5v {
> +		compatible = "regulator-fixed";
> +		regulator-name = "USB_HUB_EN";

regulator-name = "vcc5v0_usb30";
"USB_HUB_EN" is the pin name.

> +&usb_dwc3 {
> +	dr_mode = "host";
> +	#address-cells = <1>;
> +	#size-cells = <0>;
> +	status = "okay";
> +
> +	hub_2_0: hub@1 {
> +		compatible = "usb5e3,610";
> +		reg = <0x1>;
> +		vdd-supply = <&usb3_hub_5v>;

This is incorrect...
The hub is powered by VCC_5V0.
VCC5V0_USB30 provides USB VBUS.

Thanks,
Chukun