On Thu, Apr 30, 2015 at 2:44 PM, Aaro Koskinen <aaro.koskinen@xxxxxx> wrote:
> 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.
We already have a standard property for this if you only have 1 clock:
clock-frequency.
> + - refclk-type: type of the USB reference clock. Allowed values are
> + "crystal" or "external".
Should be prefixed with "cavium,".
> +
> +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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