tegrakernel/kernel/kernel-4.9/Documentation/devicetree/bindings/usb/usb-device.txt

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Generic USB Device Properties
Usually, we only use device tree for hard wired USB device.
The reference binding doc is from:
http://www.firmware.org/1275/bindings/usb/usb-1_0.ps
Required properties:
- compatible: usbVID,PID. The textual representation of VID, PID shall
be in lower case hexadecimal with leading zeroes suppressed. The
other compatible strings from the above standard binding could also
be used, but a device adhering to this binding may leave out all except
for usbVID,PID.
- reg: the port number which this device is connecting to, the range
is 1-255.
Example:
&usb1 {
status = "okay";
#address-cells = <1>;
#size-cells = <0>;
hub: genesys@1 {
compatible = "usb5e3,608";
reg = <1>;
};
}