ARM: dts: sun4i: Enable USB DRC on the Marsboard A10

Enable the otg/drc usb controller on the Marsboard A10.
Similar to Cubieboard, the 5V of the otg is directly connected to the
general 5V, so we only use the id pin.
Signed-off-by: Aleksei Mamlin <mamlinav@gmail.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

arch/arm/boot/dts/sun4i-a10-marsboard.dts

@@ -154,6 +154,10 @@ &ohci1 {
 	status = "okay";
 };
 
+&otg_sram {
+	status = "okay";
+};
+
 &pio {
 	led_pins_marsboard: led_pins@0 {
 		allwinner,pins = "PB5", "PB6", "PB7", "PB8";
@@ -161,6 +165,13 @@ led_pins_marsboard: led_pins@0 {
 		allwinner,drive = <SUN4I_PINCTRL_10_MA>;
 		allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
 	};
+
+	usb0_id_detect_pin: usb0_id_detect_pin@0 {
+		allwinner,pins = "PH4";
+		allwinner,function = "gpio_in";
+		allwinner,drive = <SUN4I_PINCTRL_10_MA>;
+		allwinner,pull = <SUN4I_PINCTRL_PULL_UP>;
+	};
 };
 
 &reg_usb1_vbus {
@@ -184,7 +195,15 @@ &uart0 {
 	status = "okay";
 };
 
+&usb_otg {
+	dr_mode = "otg";
+	status = "okay";
+};
+
 &usbphy {
+	pinctrl-names = "default";
+	pinctrl-0 = <&usb0_id_detect_pin>;
+	usb0_id_det-gpio = <&pio 7 4 GPIO_ACTIVE_HIGH>; /* PH4 */
 	usb1_vbus-supply = <&reg_usb1_vbus>;
 	usb2_vbus-supply = <&reg_usb2_vbus>;
 	status = "okay";