linux-kernel - [PATCH 4/7] riscv: dts: spacemit: Enable USB3.0 on OrangePi RV2

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Message-ID: <2f4aa209fbdb718f751b1d45b73a37044e7f26b2.1769895215.git.gaohan@iscas.ac.cn>
Date: Sun,  1 Feb 2026 05:38:11 +0800
From: Han Gao <gaohan@...as.ac.cn>
To: Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Yixun Lan <dlan@...too.org>,
	Paul Walmsley <pjw@...nel.org>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>,
	Alexandre Ghiti <alex@...ti.fr>
Cc: devicetree@...r.kernel.org,
	linux-riscv@...ts.infradead.org,
	spacemit@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	Han Gao <rabenda.cn@...il.com>,
	Han Gao <gaohan@...as.ac.cn>
Subject: [PATCH 4/7] riscv: dts: spacemit: Enable USB3.0 on OrangePi RV2

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 two
separate power supplies: one VBUS and one for hub itself.
Add two GPIO-controlled fixed-regulators to manage this.

Signed-off-by: Han Gao <gaohan@...as.ac.cn>
---
 .../boot/dts/spacemit/k1-orangepi-rv2.dts     | 46 +++++++++++++++++++
 1 file changed, 46 insertions(+)

diff --git a/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts b/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts
index f87c6ab417c4..d8d0baaec731 100644
--- a/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts
@@ -42,6 +42,25 @@ reg_vcc_4v: vcc-4v {
 		vin-supply = <&reg_dc_in>;
 	};
 
+	usb3-vbus-5v {
+		compatible = "regulator-fixed";
+		regulator-name = "USB30_VBUS";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		regulator-always-on;
+		gpio = <&gpio K1_GPIO(97) GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+	};
+
+	usb3_hub_5v: usb3-hub-5v {
+		compatible = "regulator-fixed";
+		regulator-name = "USB30_HUB";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		gpio = <&gpio K1_GPIO(123) GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+	};
+
 	leds {
 		compatible = "gpio-leds";
 
@@ -227,3 +246,30 @@ &uart0 {
 	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>;
+		reset-gpios = <&gpio K1_GPIO(124) GPIO_ACTIVE_LOW>;
+	};
+
+	hub_3_0: hub@2 {
+		compatible = "usb5e3,620";
+		reg = <0x2>;
+		vdd-supply = <&usb3_hub_5v>;
+		peer-hub = <&hub_2_0>;
+		reset-gpios = <&gpio K1_GPIO(124) GPIO_ACTIVE_LOW>;
+	};
+};
-- 
2.47.3