[PATCH] pinctrl: pinctrl-mxs: document the missing pull-ups

[Shawn Guo]

On Sat, Mar 30, 2013 at 12:51:12AM +0100, Alexandre Belloni wrote:
> Some pins on the i.mx23 and i.mx28 are missing pull-ups, document that
> oddity because it was difficult to know the expected behaviour.
> 
> Signed-off-by: Alexandre Belloni <alexandre.belloni at free-electrons.com>

Applied, thanks.

> ---
> 
> I don't think it is necessary to list the pins with the missing pull ups in
> that file but we may want to explicitly direct to the datasheet as even with
> the same chip, it can depend on the package (BGA or QFP for example).
> 
>  Documentation/devicetree/bindings/pinctrl/fsl,mxs-pinctrl.txt |    4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/pinctrl/fsl,mxs-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/fsl,mxs-pinctrl.txt
> index f7e8e8f..3077370 100644
> --- a/Documentation/devicetree/bindings/pinctrl/fsl,mxs-pinctrl.txt
> +++ b/Documentation/devicetree/bindings/pinctrl/fsl,mxs-pinctrl.txt
> @@ -70,6 +70,10 @@ Optional subnode-properties:
>      0: Disable the internal pull-up
>      1: Enable the internal pull-up
>  
> +Note that when enabling the pull-up, the internal pad keeper gets disabled.
> +Also, some pins doesn't have a pull up, in that case, setting the fsl,pull-up
> +will only disable the internal pad keeper.
> +
>  Examples:
>  
>  pinctrl at 80018000 {
> -- 
> 1.7.10.4
>