Documentation/devicetree/bindings/usb/meson-dwc-otg.txt

Platform DesignWare HS OTG USB 2.0 controller
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Required properties:
- compatible : One of:
  - "amlogic,dwc2": The DWC2 USB controller instance in AMLOGIC MESON G12A.
- reg : Should contain 1 register range (address and length)
- interrupts : Should contain 1 interrupt
- clocks: clock provider specifier
- clock-names: shall be "usb_general" and "usb1"
Refer to clk/clock-bindings.txt for generic clock consumer properties

Optional properties:
- phys: phy provider specifier
- phy-names: shall be "usb2-phy"
Refer to phy/phy-bindings.txt for generic phy consumer properties
- dr_mode: shall be one of "host", "peripheral" and "otg"
  Refer to usb/generic.txt

Example:

        dwc2_a: dwc2_a@ff400000 {
		compatible = "amlogic,dwc2";
                reg = <0x0 0xff400000 0x0 0x40000>;
		interrupts = <GIC_SPI 31 IRQ_TYPE_LEVEL_HIGH>;
		clocks = <&xtal>, <&xtal>;
		clock-names = "usb_general",
				"usb1";
		phys = <&usbphy>;
		phy-names = "usb2-phy";
        };