[PATCH 7/9] dt-bindings: media/s5p-cec.txt: document needs-hpd property

[Rob Herring]

On Wed, Jun 07, 2017 at 04:46:14PM +0200, Hans Verkuil wrote:
> From: Hans Verkuil <hans.verkuil at cisco.com>
> 
> Needed for boards that wire the CEC pin in such a way that it
> is unavailable when the HPD is low.
> 
> Signed-off-by: Hans Verkuil <hans.verkuil at cisco.com>
> Cc: Krzysztof Kozlowski <krzk at kernel.org>
> Cc: Andrzej Hajda <a.hajda at samsung.com>
> Cc: devicetree at vger.kernel.org
> ---
>  Documentation/devicetree/bindings/media/s5p-cec.txt | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/media/s5p-cec.txt b/Documentation/devicetree/bindings/media/s5p-cec.txt
> index 4bb08d9d940b..261af4d1a791 100644
> --- a/Documentation/devicetree/bindings/media/s5p-cec.txt
> +++ b/Documentation/devicetree/bindings/media/s5p-cec.txt
> @@ -17,6 +17,12 @@ Required properties:
>    - samsung,syscon-phandle - phandle to the PMU system controller
>    - hdmi-phandle - phandle to the HDMI controller
>  
> +Optional:
> +  - needs-hpd : if present the CEC support is only available when the HPD
> +    is high. Some boards only let the CEC pin through if the HPD is high, for
> +    example if there is a level converter that uses the HPD to power up
> +    or down.

Seems like something common. Can you document in a common location?

> +
>  Example:
>  
>  hdmicec: cec at 100B0000 {
> -- 
> 2.11.0
> 
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