linux/Documentation/devicetree/bindings/usb/ci13xxx-imx.txt
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   1* Freescale i.MX ci13xxx usb controllers
   2
   3Required properties:
   4- compatible: Should be "fsl,imx27-usb"
   5- reg: Should contain registers location and length
   6- interrupts: Should contain controller interrupt
   7
   8Optional properties:
   9- fsl,usbphy: phandler of usb phy that connects to the only one port
  10- fsl,usbmisc: phandler of non-core register device, with one argument
  11  that indicate usb controller index
  12- vbus-supply: regulator for vbus
  13- disable-over-current: disable over current detect
  14- external-vbus-divider: enables off-chip resistor divider for Vbus
  15
  16Examples:
  17usb@02184000 { /* USB OTG */
  18        compatible = "fsl,imx6q-usb", "fsl,imx27-usb";
  19        reg = <0x02184000 0x200>;
  20        interrupts = <0 43 0x04>;
  21        fsl,usbphy = <&usbphy1>;
  22        fsl,usbmisc = <&usbmisc 0>;
  23        disable-over-current;
  24        external-vbus-divider;
  25};
  26