[PATCH v10 17/18] arm64: dts: allwinner: h616: OrangePi Zero 2: Add USB nodes

[Andre Przywara <andre.przywara@xxxxxxx>]

The OrangePi Zero 2 has one USB-A host port, VBUS is provided by
a GPIO controlled regulator.
The USB-C port is meant to power the board, but is also connected to
the USB 0 port, which we configure as an MUSB peripheral.

Signed-off-by: Andre Przywara <andre.przywara@xxxxxxx>
---
 .../allwinner/sun50i-h616-orangepi-zero2.dts  | 42 +++++++++++++++++++
 1 file changed, 42 insertions(+)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h616-orangepi-zero2.dts b/arch/arm64/boot/dts/allwinner/sun50i-h616-orangepi-zero2.dts
index ca07cae698ce..a26201288872 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-h616-orangepi-zero2.dts
+++ b/arch/arm64/boot/dts/allwinner/sun50i-h616-orangepi-zero2.dts
@@ -49,8 +49,25 @@ reg_vcc5v: vcc5v {
 		regulator-max-microvolt = <5000000>;
 		regulator-always-on;
 	};
+
+	reg_usb1_vbus: usb1-vbus {
+		compatible = "regulator-fixed";
+		regulator-name = "usb1-vbus";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		vin-supply = <&reg_vcc5v>;
+		enable-active-high;
+		gpio = <&pio 2 16 GPIO_ACTIVE_HIGH>; /* PC16 */
+		status = "okay";
+	};
 };
 
+&ehci1 {
+	status = "okay";
+};
+
+/* USB 2 & 3 are on headers only. */
+
 &emac0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&ext_rgmii_pins>;
@@ -76,6 +93,10 @@ &mmc0 {
 	status = "okay";
 };
 
+&ohci1 {
+	status = "okay";
+};
+
 &r_rsb {
 	status = "okay";
 
@@ -201,3 +222,24 @@ &uart0 {
 	pinctrl-0 = <&uart0_ph_pins>;
 	status = "okay";
 };
+
+&usbotg {
+	/*
+	 * PHY0 pins are connected to a USB-C socket, but a role switch
+	 * is not implemented: both CC pins are pulled to GND.
+	 * The VBUS pins power the device, so a fixed peripheral mode
+	 * is the best choice.
+	 * The board can be powered via GPIOs, in this case port0 *can*
+	 * act as a host (with a cable/adapter ignoring CC), as VBUS is
+	 * then provided by the GPIOs. Any user of this setup would
+	 * need to adjust the DT accordingly: dr_mode set to "host",
+	 * enabling OHCI0 and EHCI0.
+	 */
+	dr_mode = "peripheral";
+	status = "okay";
+};
+
+&usbphy {
+	usb1_vbus-supply = <&reg_usb1_vbus>;
+	status = "okay";
+};
-- 
2.25.1