linux/Documentation/devicetree/bindings/usb/usb-ehci.txt
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   1USB EHCI controllers
   2
   3Required properties:
   4  - compatible : should be "usb-ehci".
   5  - reg : should contain at least address and length of the standard EHCI
   6    register set for the device. Optional platform-dependent registers
   7    (debug-port or other) can be also specified here, but only after
   8    definition of standard EHCI registers.
   9  - interrupts : one EHCI interrupt should be described here.
  10If device registers are implemented in big endian mode, the device
  11node should have "big-endian-regs" property.
  12If controller implementation operates with big endian descriptors,
  13"big-endian-desc" property should be specified.
  14If both big endian registers and descriptors are used by the controller
  15implementation, "big-endian" property can be specified instead of having
  16both "big-endian-regs" and "big-endian-desc".
  17
  18Example (Sequoia 440EPx):
  19    ehci@e0000300 {
  20           compatible = "ibm,usb-ehci-440epx", "usb-ehci";
  21           interrupt-parent = <&UIC0>;
  22           interrupts = <1a 4>;
  23           reg = <0 e0000300 90 0 e0000390 70>;
  24           big-endian;
  25   };
  26
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