Enable the PCIe controller and USB3 XHCI host on the OpenWrt One
board. The USB controller is configured for USB 2.0 only mode, as the
shared USB3/PCIe PHY is dedicated to PCIe functionality on this board.

Signed-off-by: Sjoerd Simons <sjoerd@collabora.com>
---
 .../boot/dts/mediatek/mt7981b-openwrt-one.dts      | 45 ++++++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt7981b-openwrt-one.dts b/arch/arm64/boot/dts/mediatek/mt7981b-openwrt-one.dts
index 968b91f55bb27..5834273839c17 100644
--- a/arch/arm64/boot/dts/mediatek/mt7981b-openwrt-one.dts
+++ b/arch/arm64/boot/dts/mediatek/mt7981b-openwrt-one.dts
@@ -20,8 +20,53 @@ memory@40000000 {
 		reg = <0 0x40000000 0 0x40000000>;
 		device_type = "memory";
 	};
+
+	reg_3p3v: regulator-3p3v {
+		compatible = "regulator-fixed";
+		regulator-name = "fixed-3.3V";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-boot-on;
+		regulator-always-on;
+	};
+
+	reg_5v: regulator-5v {
+		compatible = "regulator-fixed";
+		regulator-name = "fixed-5V";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		regulator-boot-on;
+		regulator-always-on;
+	};
+};
+
+&pcie {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pcie_pins>;
+	status = "okay";
+};
+
+&pio {
+	pcie_pins: pcie-pins {
+		mux {
+			function = "pcie";
+			groups = "pcie_pereset";
+		};
+	};
 };
 
 &uart0 {
 	status = "okay";
 };
+
+&usb_phy {
+	status = "okay";
+};
+
+&xhci {
+	phys = <&u2port0 PHY_TYPE_USB2>;
+	vusb33-supply = <&reg_3p3v>;
+	vbus-supply = <&reg_5v>;
+	mediatek,u3p-dis-msk = <0x01>;
+	status = "okay";
+};

-- 
2.51.0