[PATCH 1/2] dt-bindings: rockchip-dw-mshc: add optional rockchip,default-num-phases

[Rob Herring]

On Wed, Apr 19, 2017 at 05:00:33PM +0800, Shawn Lin wrote:
> By default, dw_mmc-rockchip will execute tuning for each degree.
> So we won't miss every point of the good sample windows. However,
> probably the phases are linear inside the good sample window.
> Actually we don't need to do tuning for each degree so that we could
> save some time, for instance, probe the driver or resume from S3.
> 
> Signed-off-by: Shawn Lin <shawn.lin at rock-chips.com>
> ---
> 
>  Documentation/devicetree/bindings/mmc/rockchip-dw-mshc.txt | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/mmc/rockchip-dw-mshc.txt b/Documentation/devicetree/bindings/mmc/rockchip-dw-mshc.txt
> index 520d61d..ea47ec0 100644
> --- a/Documentation/devicetree/bindings/mmc/rockchip-dw-mshc.txt
> +++ b/Documentation/devicetree/bindings/mmc/rockchip-dw-mshc.txt
> @@ -31,6 +31,10 @@ Optional Properties:
>    probing, low speeds or in case where all phases work at tuning time.
>    If not specified 0 deg will be used.
>  
> +* rockchip,default-num-phases: The default number of times that the host
> +  execute tuning when needed. If not specified, the host will do tuning
> +  for 360 times, namely tuning for each degree.

How is it default when you specify it? I would think default here is 
360.

Should this be common?

Rob