ARM: Dove: add fixed regulator for CuBox USB power

CuBox needs to enable USB power on a gpio pin. Add a fixed regulator
to always enable usb power on boot.
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>

arch/arm/boot/dts/dove-cubox.dts

@@ -26,6 +26,24 @@ power {
 			linux,default-trigger = "default-on";
 		};
 	};
+
+	regulators {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		usb_power: regulator@1 {
+			compatible = "regulator-fixed";
+			reg = <1>;
+			regulator-name = "USB Power";
+			regulator-min-microvolt = <5000000>;
+			regulator-max-microvolt = <5000000>;
+			enable-active-high;
+			regulator-always-on;
+			regulator-boot-on;
+			gpio = <&gpio0 1 0>;
+		};
+	};
 };
 
 &uart0 { status = "okay"; };
@@ -50,9 +68,14 @@ spi-flash@0 {
 };
 
 &pinctrl {
-	pinctrl-0 = <&pmx_gpio_12>;
+	pinctrl-0 = <&pmx_gpio_1 &pmx_gpio_12>;
 	pinctrl-names = "default";
 
+	pmx_gpio_1: pmx-gpio-1 {
+		marvell,pins = "mpp1";
+		marvell,function = "gpio";
+	};
+
 	pmx_gpio_12: pmx-gpio-12 {
 		marvell,pins = "mpp12";
 		marvell,function = "gpio";

arch/arm/mach-dove/Kconfig

@@ -24,6 +24,8 @@ config MACH_DOVE_DT
 	bool "Marvell Dove Flattened Device Tree"
 	select MVEBU_CLK_CORE
 	select MVEBU_CLK_GATING
+	select REGULATOR
+	select REGULATOR_FIXED_VOLTAGE
 	select USE_OF
 	help
 	  Say 'Y' here if you want your kernel to support the