Re: [PATCH 01/10] dt-bindings: arm-smmu: Allow up to 3 power-domains

[Krzysztof Kozlowski]

On 09/11/2022 12:12, Konrad Dybcio wrote:
> Some SMMUs require that a vote is held on as much as 3 separate PDs
> (hello Qualcomm). Allow it in bindings.
> 
> Signed-off-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx>
> ---
>  Documentation/devicetree/bindings/iommu/arm,smmu.yaml | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/iommu/arm,smmu.yaml b/Documentation/devicetree/bindings/iommu/arm,smmu.yaml
> index 9066e6df1ba1..1897d0d4d820 100644
> --- a/Documentation/devicetree/bindings/iommu/arm,smmu.yaml
> +++ b/Documentation/devicetree/bindings/iommu/arm,smmu.yaml
> @@ -159,7 +159,7 @@ properties:
>            through the TCU's programming interface.
>  
>    power-domains:
> -    maxItems: 1
> +    maxItems: 3

This is not correct - you now require 3 power domains everywhere. If you
test the DTS you will notice it.

You need min and max items, plus provably allOf:if:then restricting it
per some variants (if it makes sense... depends which SMMUs need it).

Best regards,
Krzysztof