rockchip: dts: rk3328: support and enable dwc2

Enable dwc2 controller and add fixed regulator for dwc2 controller to
control vbus.

Signed-off-by: Meng Dongyang <daniel.meng@rock-chips.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>

arch/arm/dts/rk3328-evb.dts

@@ -15,6 +15,15 @@
 		stdout-path = &uart2;
 	};
 
+	vcc5v0_otg: vcc5v0-otg-drv {
+		compatible = "regulator-fixed";
+		enable-active-high;
+		regulator-name = "vcc5v0_otg";
+		gpio = <&gpio0 27 GPIO_ACTIVE_HIGH>;
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+	};
+
 	vcc5v0_host_xhci: vcc5v0-host-xhci-drv {
 		compatible = "regulator-fixed";
 		enable-active-high;
@@ -61,6 +70,11 @@
 	status = "okay";
 };
 
+&usb20_otg {
+	vbus-supply = <&vcc5v0_otg>;
+	status = "okay";
+};
+
 &usb_host0_xhci {
 	vbus-supply = <&vcc5v0_host_xhci>;
 	status = "okay";

arch/arm/dts/rk3328.dtsi

@@ -467,6 +467,16 @@
 		status = "disabled";
 	};
 
+	usb20_otg: usb@ff580000 {
+		compatible = "rockchip,rk3328-usb", "rockchip,rk3066-usb",
+			     "snps,dwc2";
+		reg = <0x0 0xff580000 0x0 0x40000>;
+		interrupts = <GIC_SPI 23 IRQ_TYPE_LEVEL_HIGH>;
+		hnp-srp-disable;
+		dr_mode = "otg";
+		status = "disabled";
+	};
+
 	sdmmc_ext: rksdmmc@ff5f0000 {
 		compatible = "rockchip,rk3328-dw-mshc", "rockchip,rk3288-dw-mshc";
 		reg = <0x0 0xff5f0000 0x0 0x4000>;