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Subject: Re: [PATCH v9 3/4] dt-bindings: arm-smmu: add binding for Tegra194
 SMMU
To:     Krishna Reddy <vdumpa@nvidia.com>, <joro@8bytes.org>,
        <will@kernel.org>, <robin.murphy@arm.com>, <robh+dt@kernel.org>,
        <treding@nvidia.com>
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References: <20200630235752.8737-1-vdumpa@nvidia.com>
 <20200630235752.8737-4-vdumpa@nvidia.com>
From:   Jon Hunter <jonathanh@nvidia.com>
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Date:   Wed, 1 Jul 2020 09:19:54 +0100
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On 01/07/2020 00:57, Krishna Reddy wrote:
> Add binding for NVIDIA's Tegra194 SoC SMMU topology that is based
> on ARM MMU-500.
> 
> Signed-off-by: Krishna Reddy <vdumpa@nvidia.com>
> ---
>  .../devicetree/bindings/iommu/arm,smmu.yaml    | 18 ++++++++++++++++++
>  1 file changed, 18 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/iommu/arm,smmu.yaml b/Documentation/devicetree/bindings/iommu/arm,smmu.yaml
> index d7ceb4c34423b..662c46e16f07d 100644
> --- a/Documentation/devicetree/bindings/iommu/arm,smmu.yaml
> +++ b/Documentation/devicetree/bindings/iommu/arm,smmu.yaml
> @@ -38,6 +38,11 @@ properties:
>                - qcom,sc7180-smmu-500
>                - qcom,sdm845-smmu-500
>            - const: arm,mmu-500
> +      - description: NVIDIA SoCs that use more than one "arm,mmu-500"
> +        items:
> +          - enum:
> +              - nvidia,tegra194-smmu
> +          - const: arm,mmu-500

We should also address Robin's comments here. I don't think that we ever
want to fail back to just the regular 'arm,mmu-500' and should be should
probably just drop this part.

Jon

-- 
nvpublic