Re: [PATCH 2/3] dt-bindings: drm/bridge: ti-sn65dsi83: Add vcc supply bindings

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On Wed, Oct 6, 2021 at 2:47 AM Alexander Stein
<alexander.stein@xxxxxxxxxxxxxxx> wrote:
>
> Add a VCC regulator which needs to be enabled before the EN pin is
> released.
>
> Signed-off-by: Alexander Stein <alexander.stein@xxxxxxxxxxxxxxx>
> ---
>  .../devicetree/bindings/display/bridge/ti,sn65dsi83.yaml     | 5 +++++
>  1 file changed, 5 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/display/bridge/ti,sn65dsi83.yaml b/Documentation/devicetree/bindings/display/bridge/ti,sn65dsi83.yaml
> index 07b20383cbca..149cff3233c2 100644
> --- a/Documentation/devicetree/bindings/display/bridge/ti,sn65dsi83.yaml
> +++ b/Documentation/devicetree/bindings/display/bridge/ti,sn65dsi83.yaml
> @@ -32,6 +32,9 @@ properties:
>      maxItems: 1
>      description: GPIO specifier for bridge_en pin (active high).
>
> +  vcc-supply:
> +    description: A 1.8V power supply (see regulator/regulator.yaml).
> +
>    ports:
>      $ref: /schemas/graph.yaml#/properties/ports
>
> @@ -94,6 +97,7 @@ required:
>    - compatible
>    - reg
>    - enable-gpios
> +  - vcc-supply

You generally can't make added properties required unless all DT files
already had this property. It breaks compatibility.

Rob



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