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Message-ID: <689714e8-a5bb-7d13-f2f2-ee26b2c53811@nvidia.com>
Date: Wed, 1 Jul 2020 09:19:54 +0100
From: Jon Hunter <jonathanh@...dia.com>
To: Krishna Reddy <vdumpa@...dia.com>, <joro@...tes.org>,
<will@...nel.org>, <robin.murphy@....com>, <robh+dt@...nel.org>,
<treding@...dia.com>
CC: <devicetree@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<iommu@...ts.linux-foundation.org>, <linux-kernel@...r.kernel.org>,
<linux-tegra@...r.kernel.org>, <yhsu@...dia.com>,
<snikam@...dia.com>, <praithatha@...dia.com>, <talho@...dia.com>,
<bbiswas@...dia.com>, <mperttunen@...dia.com>,
<nicolinc@...dia.com>, <bhuntsman@...dia.com>,
<nicoleotsuka@...il.com>
Subject: Re: [PATCH v9 3/4] dt-bindings: arm-smmu: add binding for Tegra194
SMMU
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@...dia.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
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