On Wed, Nov 19, 2014 at 12:59:21PM +0100, Johan Hovold wrote:
> Add "micrel,rmii-reference-clock-select-25-mhz" to Micrel ethernet PHY
> binding documentation.
>
> This property is needed to properly describe some revisions of Micrel
> PHYs which has the function of this configuration bit inverted so that
> setting it enables 25 MHz rather than 50 MHz clock mode.
>
> Note that a clock reference ("rmii-ref") is still needed to actually
> select either mode.
>
> Cc: [email protected]
> Signed-off-by: Johan Hovold <[email protected]>
> ---
> Documentation/devicetree/bindings/net/micrel.txt | 11 +++++++++++
> 1 file changed, 11 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/net/micrel.txt
> b/Documentation/devicetree/bindings/net/micrel.txt
> index 20a6cac7abc6..87496a8c64ab 100644
> --- a/Documentation/devicetree/bindings/net/micrel.txt
> +++ b/Documentation/devicetree/bindings/net/micrel.txt
> @@ -19,6 +19,17 @@ Optional properties:
>
> See the respective PHY datasheet for the mode values.
>
> + - micrel,rmii-reference-clock-select-25-mhz: RMII Reference Clock Select
> + bit selects 25 MHz mode
> +
> + Setting the RMII Reference Clock Select bit enables 25 MHz rather
> + than 50 MHz clock mode.
> +
> + Note that this option in only needed for certain PHY revisions with a
> + non-standard, inverted function of this configuration bit.
> + Specifically, a clock reference ("rmii-ref" below) is always needed to
> + actually select a mode.
Nice, that should be clear.
Acked-by: Sascha Hauer <[email protected]>
Sascha
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