TI Keystone USB PHYRequired properties: - compatible: should be "ti,keystone-usbphy". - #address-cells, #size-cells : should be '1' if the device has sub-nodes with 'reg' property. - reg : Address and length of the usb phy control register set.The main purpose of this PHY driver is to enable the USB PHY reference clockgate on the Keystone SOC for both the USB2 and USB3 PHY. Otherwise it is justan NOP PHY driver. Hence this node is referenced as both the usb2 and usb3phy node in the USB Glue layer driver node.usb_phy: usb_phy@2620738 { compatible = "ti,keystone-usbphy"; #address-cells = <1>; #size-cells = <1>; reg = <0x2620738 32>;};