Re: [PATCH v9 1/4] dt-bindings: gpu: mali-bifrost: Add Mediatek MT8183

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On Fri, Jan 08, 2021 at 09:10:08AM +0800, Nicolas Boichat wrote:
> Define a compatible string for the Mali Bifrost GPU found in
> Mediatek's MT8183 SoCs.
> 
> Signed-off-by: Nicolas Boichat <drinkcat@xxxxxxxxxxxx>
> Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@xxxxxxxxxxxxx>
> ---
> 
> (no changes since v6)
> 
> Changes in v6:
>  - Rebased, actually tested with recent mesa driver.
>  - No change
> 
> Changes in v5:
>  - Rename "2d" power domain to "core2"
> 
> Changes in v4:
>  - Add power-domain-names description
>    (kept Alyssa's reviewed-by as the change is minor)
> 
> Changes in v3:
>  - No change
> 
>  .../bindings/gpu/arm,mali-bifrost.yaml        | 25 +++++++++++++++++++
>  1 file changed, 25 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml b/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml
> index 184492162e7e..71b613ee5bd7 100644
> --- a/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml
> +++ b/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml
> @@ -17,6 +17,7 @@ properties:
>      items:
>        - enum:
>            - amlogic,meson-g12a-mali
> +          - mediatek,mt8183-mali
>            - realtek,rtd1619-mali
>            - rockchip,px30-mali
>        - const: arm,mali-bifrost # Mali Bifrost GPU model/revision is fully discoverable
> @@ -87,6 +88,30 @@ allOf:
>      then:
>        required:
>          - resets
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: mediatek,mt8183-mali
> +    then:
> +      properties:
> +        sram-supply: true

This has to be defined at the top-level or there will be an error when 
it is present (due to additionalProperties).

In this if/then you can do:

else:
  sram-supply: false

to disallow it if not 'mediatek,mt8183-mali'

> +        power-domains:
> +          description:
> +            List of phandle and PM domain specifier as documented in
> +            Documentation/devicetree/bindings/power/power_domain.txt
> +          minItems: 3
> +          maxItems: 3
> +        power-domain-names:
> +          items:
> +            - const: core0
> +            - const: core1
> +            - const: core2
> +
> +      required:
> +        - sram-supply
> +        - power-domains
> +        - power-domains-names
>  
>  examples:
>    - |
> -- 
> 2.29.2.729.g45daf8777d-goog
> 
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