powerpc: Refactor device tree binding

Split device tree binding out of booting-without-of.txt and put them
into their own files per binding.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

1 files changed, 25 insertions, 0 deletions

diff --git a/Documentation/powerpc/dts-bindings/usb-ehci.txt b/Documentation/powerpc/dts-bindings/usb-ehci.txt
new file mode 100644
index 000000000000..fa18612f757b
--- /dev/null
+++ b/Documentation/powerpc/dts-bindings/usb-ehci.txt
@@ -0,0 +1,25 @@
+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;
+   };