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.bell...@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@80018000 {
> --
> 1.7.10.4
>
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