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Diffstat (limited to 'Documentation/powerpc')
| -rw-r--r-- | Documentation/powerpc/booting-without-of.txt | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/Documentation/powerpc/booting-without-of.txt b/Documentation/powerpc/booting-without-of.txt index 2efea2d497f..7b4e8a70882 100644 --- a/Documentation/powerpc/booting-without-of.txt +++ b/Documentation/powerpc/booting-without-of.txt @@ -57,6 +57,7 @@ Table of Contents n) 4xx/Axon EMAC ethernet nodes o) Xilinx IP cores p) Freescale Synchronous Serial Interface + q) USB EHCI controllers VII - Specifying interrupt information for devices 1) interrupts property @@ -2789,6 +2790,33 @@ platforms are moved over to use the flattened-device-tree model. interrupt-parent = < &ipic >; }; + q) 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; + }; + + More devices will be defined as this spec matures. VII - Specifying interrupt information for devices |