[PATCH 1/2] ARM: dts: sun9i: cubieboard4: Enable USB support

[wens@csie.org (Chen-Yu Tsai)]

The Cubieboard4 has 4 USB ports. 3 of them are connected to a GL850G
USB hub chip on usb1. The fourth one, the lower port of 2 ports next
to the power barrel, is directly connected to usb3.

2 power enable GPIOs are used between the 2 port groups, 1 for each.
This raises the possibility of having no power for hub-connected port
next to the power barrel, if usb3 is not enabled.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
---
 arch/arm/boot/dts/sun9i-a80-cubieboard4.dts | 60 +++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)

diff --git a/arch/arm/boot/dts/sun9i-a80-cubieboard4.dts b/arch/arm/boot/dts/sun9i-a80-cubieboard4.dts
index 6484dcf69873..42ddc046213c 100644
--- a/arch/arm/boot/dts/sun9i-a80-cubieboard4.dts
+++ b/arch/arm/boot/dts/sun9i-a80-cubieboard4.dts
@@ -62,6 +62,30 @@
 		stdout-path = "serial0:115200n8";
 	};
 
+	reg_usb3_vbus: usb3-vbus {
+		compatible = "regulator-fixed";
+		pinctrl-names = "default";
+		pinctrl-0 = <&usb3_vbus_pin_cubieboard4>;
+		regulator-name = "usb3-vbus";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		enable-active-high;
+		gpio = <&pio 7 15 GPIO_ACTIVE_HIGH>; /* PH15 */
+	};
+};
+
+&ehci0 {
+	status = "okay";
+};
+
+&ehci2 {
+	status = "okay";
+};
+
+/* usb1 is connected to a GL850G USB hub chip, so no need to enable OHCI */
+
+&ohci2 {
+	status = "okay";
 };
 
 &pio {
@@ -71,6 +95,20 @@
 		allwinner,drive = <SUN4I_PINCTRL_10_MA>;
 		allwinner,pull = <SUN4I_PINCTRL_PULL_UP>;
 	};
+
+	usb1_vbus_pin_cubieboard4: usb1_vbus_pin at 1 {
+		allwinner,pins = "PH14";
+		allwinner,function = "gpio_out";
+		allwinner,drive = <SUN4I_PINCTRL_10_MA>;
+		allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
+	};
+
+	usb3_vbus_pin_cubieboard4: usb3_vbus_pin at 1 {
+		allwinner,pins = "PH15";
+		allwinner,function = "gpio_out";
+		allwinner,drive = <SUN4I_PINCTRL_10_MA>;
+		allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
+	};
 };
 
 &mmc0 {
@@ -92,8 +130,30 @@
 	status = "okay";
 };
 
+&reg_usb1_vbus {
+	pinctrl-0 = <&usb1_vbus_pin_cubieboard4>;
+	gpio = <&pio 7 14 GPIO_ACTIVE_HIGH>; /* PH14 */
+	status = "okay";
+};
+
 &uart0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart0_pins_a>;
 	status = "okay";
 };
+
+&usbphy1 {
+	phy-supply = <&reg_usb1_vbus>;
+	status = "okay";
+};
+
+/*
+ * Unfortunately reg_usb1_vbus also powers one of the ports from usb3's hub.
+ * One should always make sure both regulators are enabled and working for
+ * all USB ports to have power.
+ */
+
+&usbphy3 {
+	phy-supply = <&reg_usb3_vbus>;
+	status = "okay";
+};
-- 
2.1.4