Document device-tree bindings for the USB controller on older
OCTEON SOCs (OCTEON, OCTEON+).
Signed-off-by: Aaro Koskinen <aaro.koskinen@xxxxxx>
---
.../devicetree/bindings/usb/octeon-usb.txt | 58 ++++++++++++++++++++++
1 file changed, 58 insertions(+)
create mode 100644 Documentation/devicetree/bindings/usb/octeon-usb.txt
diff --git a/Documentation/devicetree/bindings/usb/octeon-usb.txt b/Documentation/devicetree/bindings/usb/octeon-usb.txt
new file mode 100644
index 0000000..fd121c4
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/octeon-usb.txt
@@ -0,0 +1,58 @@
+OCTEON/OCTEON+ USB BLOCK
+
+1) Main node
+
+ Required properties:
+
+ - compatible: must be "cavium,octeon-5750-usbn"
+
+ - reg: specifies the physical base address of the USBN block and
+ the length of the memory mapped region.
+
+ - #address-cells: specifies the number of cells needed to encode an
+ address. The value must be 2.
+
+ - #size-cells: specifies the number of cells used to represent the size
+ of an address. The value must be 2.
+
+ - ranges: specifies the translation between child address space and parent
+ address space.
+
+ - refclk-frequency: speed of the USB reference clock. Allowed values are
+ 12000000, 24000000 or 48000000.
+
+ - refclk-type: type of the USB reference clock. Allowed values are
+ "crystal" or "external".
+
+2) Child node
+
+ The main node must have one child node which describes the built-in
+ USB controller.
+
+ Required properties:
+
+ - compatible: must be "cavium,octeon-5750-usbc"
+
+ - reg: specifies the physical base address of the USBC block and
+ the length of the memory mapped region.
+
+ - interrupts: specifies the interrupt number for the USB controller.
+
+3) Example:
+
+ usbn: usbn@1180068000000 {
+ compatible = "cavium,octeon-5750-usbn";
+ reg = <0x11800 0x68000000 0x0 0x1000>;
+ ranges; /* Direct mapping */
+ #address-cells = <2>;
+ #size-cells = <2>;
+ refclk-frequency = <12000000>;
+ refclk-type = "crystal";
+
+ usbc@16f0010000000 {
+ compatible = "cavium,octeon-5750-usbc";
+ reg = <0x16f00 0x10000000 0x0 0x80000>;
+ interrupts = <0 56>;
+ };
+ };
+
--
2.3.3
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