linux-kernel - Re: [PATCH v4 1/5] dt-bindings: iommu: mediatek: Add mediatek,infracfg phandle

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Date:   Thu, 16 Jun 2022 14:57:53 +0200
From:   Matthias Brugger <matthias.bgg@...il.com>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>, yong.wu@...iatek.com
Cc:     joro@...tes.org, will@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org,
        iommu@...ts.linux-foundation.org,
        linux-mediatek@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        krzysztof.kozlowski@...aro.org, miles.chen@...iatek.com
Subject: Re: [PATCH v4 1/5] dt-bindings: iommu: mediatek: Add
 mediatek,infracfg phandle



On 16/06/2022 13:08, AngeloGioacchino Del Regno wrote:
> Add property "mediatek,infracfg" to let the mtk_iommu driver retrieve
> a phandle to the infracfg syscon instead of performing a per-soc
> compatible lookup in the entire devicetree and set it as a required
> property for MT2712 and MT8173.
> 
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>

Reviewed-by: Matthias Brugger <matthias.bgg@...il.com>

> ---
>   .../bindings/iommu/mediatek,iommu.yaml          | 17 +++++++++++++++++
>   1 file changed, 17 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml b/Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml
> index 2ae3bbad7f1a..fee0241b5098 100644
> --- a/Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml
> +++ b/Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml
> @@ -101,6 +101,10 @@ properties:
>       items:
>         - const: bclk
>   
> +  mediatek,infracfg:
> +    $ref: /schemas/types.yaml#/definitions/phandle
> +    description: The phandle to the mediatek infracfg syscon
> +
>     mediatek,larbs:
>       $ref: /schemas/types.yaml#/definitions/phandle-array
>       minItems: 1
> @@ -167,6 +171,18 @@ allOf:
>         required:
>           - power-domains
>   
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            enum:
> +              - mediatek,mt2712-m4u
> +              - mediatek,mt8173-m4u
> +
> +    then:
> +      required:
> +        - mediatek,infracfg
> +
>     - if: # The IOMMUs don't have larbs.
>         not:
>           properties:
> @@ -191,6 +207,7 @@ examples:
>               interrupts = <GIC_SPI 139 IRQ_TYPE_LEVEL_LOW>;
>               clocks = <&infracfg CLK_INFRA_M4U>;
>               clock-names = "bclk";
> +            mediatek,infracfg = <&infracfg>;
>               mediatek,larbs = <&larb0>, <&larb1>, <&larb2>,
>                                <&larb3>, <&larb4>, <&larb5>;
>               #iommu-cells = <1>;