ARM: Kirkwood: Convert Dockstar to use regulators

Control the power to USB using a fixed regulator.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>

arch/arm/boot/dts/kirkwood-dockstar.dts

@@ -54,4 +54,21 @@ fault {
 			gpios = <&gpio1 15 1>;
 		};
 	};
+	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 29 0>;
+		};
+	};
 };

arch/arm/mach-kirkwood/board-dockstar.c

@@ -24,7 +24,6 @@
 #include <linux/of_fdt.h>
 #include <linux/of_irq.h>
 #include <linux/of_platform.h>
-#include <linux/gpio.h>
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
@@ -52,9 +51,5 @@ void __init dockstar_dt_init(void)
 	 */
 	kirkwood_mpp_conf(dockstar_mpp_config);
 
-	if (gpio_request(29, "USB Power Enable") != 0 ||
-	    gpio_direction_output(29, 1) != 0)
-		pr_err("can't setup GPIO 29 (USB Power Enable)\n");
-
 	kirkwood_ge00_init(&dockstar_ge00_data);
 }