lantiq: use regulator for USB GPIO

One is already present. The other one can be implemented in terms of the
PHY.

Signed-off-by: Rosen Penev <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/17250
Signed-off-by: John Crispin <[email protected]>

target/linux/lantiq/files/arch/mips/boot/dts/lantiq/ar9_zte_h201l.dts

@@ -96,11 +96,6 @@
 			gpio-export,output = <1>;
 			gpios = <&gpio 38 GPIO_ACTIVE_HIGH>;
 		};
-		usb {
-			gpio-export,name = "usb";
-			gpio-export,output = <1>;
-			gpios = <&gpio 28 GPIO_ACTIVE_HIGH>;
-		};
 		wifi {
 			gpio-export,name = "wifi";
 			gpio-export,output = <1>;
@@ -108,6 +103,18 @@
 		};
 	};
 
+	usb_phy: regulator-usb-phy {
+		compatible = "regulator-fixed";
+
+		regulator-name = "USB_PHY";
+
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+
+		gpios = <&gpio 28 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+	};
+
 	usb_vbus: regulator-usb-vbus {
 		compatible = "regulator-fixed";
 
@@ -166,6 +173,7 @@
 
 &usb_phy0 {
 	status = "okay";
+	phy-supply = <&usb_phy>;
 };