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SMSC USB4604 High-Speed Hub Controller

Required properties:
- compatible: Should be "smsc,usb4604"

Optional properties:
- reg: Specifies the i2c slave address, it is required and should be 0x2d
       if I2C is used.
- reset-gpios: Should specify GPIO for reset.
- initial-mode: Should specify initial mode.
                (1 for HUB mode, 2 for STANDBY mode)

Examples:
	usb-hub@2d {
		compatible = "smsc,usb4604";
		reg = <0x2d>;
		reset-gpios = <&gpx3 5 1>;
		initial-mode = <1>;
	};