[PATCH v4 1/3] i2c: cadence: Document device tree bindings

[Rob Herring]

On Thu, Apr 3, 2014 at 12:59 PM, Soren Brinkmann
<soren.brinkmann at xilinx.com> wrote:
> Add device tree binding documentation for the Cadence I2C controller.
>
> Signed-off-by: Soren Brinkmann <soren.brinkmann at xilinx.com>
> ---
>
> Changes in v4:
>  - moved adding DT docs into this dedicated patch
>
> Changes in v3: None
> Changes in v2: None
>
> ---
>  .../devicetree/bindings/i2c/i2c-cadence.txt         | 21 +++++++++++++++++++++
>  1 file changed, 21 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/i2c/i2c-cadence.txt
>
> diff --git a/Documentation/devicetree/bindings/i2c/i2c-cadence.txt b/Documentation/devicetree/bindings/i2c/i2c-cadence.txt
> new file mode 100644
> index 000000000000..685adf513111
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/i2c/i2c-cadence.txt
> @@ -0,0 +1,21 @@
> +Binding for the Cadence I2C controller
> +
> +Required properties:
> +  compatible: Compatibility string. Must be 'cdns,i2c-r1p10'.
> +  clocks: From common clock bindings. Phandle to input clock.
> +
> +Optional properties:
> +  clock-frequency: Desired operating frequency, in Hz, of the bus (actual may
> +                  be lower). Defaults to 400000 if not specified.

Since not all devices support 400kHz, I would prefer that the default
be 100kHz. Also, it would be good if what speed the default is
consistent across i2c drivers.

Rob