linux/Documentation/devicetree/bindings/usb/mxs-phy.txt
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   1* Freescale MXS USB Phy Device
   2
   3Required properties:
   4- compatible: Should be "fsl,imx23-usbphy"
   5- reg: Should contain registers location and length
   6- interrupts: Should contain phy interrupt
   7
   8Example:
   9usbphy1: usbphy@020c9000 {
  10        compatible = "fsl,imx6q-usbphy", "fsl,imx23-usbphy";
  11        reg = <0x020c9000 0x1000>;
  12        interrupts = <0 44 0x04>;
  13};
  14