linux-kernel - Re: [PATCH 2/3] ARM: dts: qcom: sdx55: Add Qcom SMMU-500 as the fallback for IOMMU node

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Date:   Mon, 23 Jan 2023 14:21:05 +0100
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        andersson@...nel.org, will@...nel.org, joro@...tes.org,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org
Cc:     linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, iommu@...ts.linux.dev,
        dmitry.baryshkov@...aro.org, stable@...r.kernel.org
Subject: Re: [PATCH 2/3] ARM: dts: qcom: sdx55: Add Qcom SMMU-500 as the
 fallback for IOMMU node



On 23.01.2023 14:19, Manivannan Sadhasivam wrote:
> SDX55 uses the Qcom version of the SMMU-500 IP. So use "qcom,smmu-500"
> compatible as the fallback to the SoC specific compatible.
> 
> Cc: <stable@...r.kernel.org> # 5.12
> Fixes: a2bdfdfba2af ("ARM: dts: qcom: sdx55: Enable ARM SMMU")
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> ---
Reviewed-by: Konrad Dybcio <konrad.dybcio@...aro.org>

Konrad
>  arch/arm/boot/dts/qcom-sdx55.dtsi | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm/boot/dts/qcom-sdx55.dtsi b/arch/arm/boot/dts/qcom-sdx55.dtsi
> index f1c0dab40992..93d71aff3fab 100644
> --- a/arch/arm/boot/dts/qcom-sdx55.dtsi
> +++ b/arch/arm/boot/dts/qcom-sdx55.dtsi
> @@ -578,7 +578,7 @@ pil-reloc@94c {
>  		};
>  
>  		apps_smmu: iommu@...00000 {
> -			compatible = "qcom,sdx55-smmu-500", "arm,mmu-500";
> +			compatible = "qcom,sdx55-smmu-500", "qcom,smmu-500", "arm,mmu-500";
>  			reg = <0x15000000 0x20000>;
>  			#iommu-cells = <2>;
>  			#global-interrupts = <1>;