| USB EHCI controllers | 
 |  | 
 | Required properties: | 
 |   - compatible : should be "usb-ehci". | 
 |   - reg : should contain at least address and length of the standard EHCI | 
 |     register set for the device. Optional platform-dependent registers | 
 |     (debug-port or other) can be also specified here, but only after | 
 |     definition of standard EHCI registers. | 
 |   - interrupts : one EHCI interrupt should be described here. | 
 | If device registers are implemented in big endian mode, the device | 
 | node should have "big-endian-regs" property. | 
 | If controller implementation operates with big endian descriptors, | 
 | "big-endian-desc" property should be specified. | 
 | If both big endian registers and descriptors are used by the controller | 
 | implementation, "big-endian" property can be specified instead of having | 
 | both "big-endian-regs" and "big-endian-desc". | 
 |  | 
 | Example (Sequoia 440EPx): | 
 |     ehci@e0000300 { | 
 | 	   compatible = "ibm,usb-ehci-440epx", "usb-ehci"; | 
 | 	   interrupt-parent = <&UIC0>; | 
 | 	   interrupts = <1a 4>; | 
 | 	   reg = <0 e0000300 90 0 e0000390 70>; | 
 | 	   big-endian; | 
 |    }; |