linux-kernel - Re: [PATCH 2/2] arm64: dts: qcom: msm8998: add qcom,msm8998-lpass-smmu compatible

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Message-ID: <xjrzsagzcqorynvhp5o6p32a7f7gkz42wgrgrgdnok5332nkv2@w2amrqa327rr>
Date: Wed, 28 Aug 2024 23:48:31 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Marc Gonzalez <mgonzalez@...ebox.fr>
Cc: Rob Clark <robdclark@...il.com>, Will Deacon <will@...nel.org>, 
	Robin Murphy <robin.murphy@....com>, Joerg Roedel <joro@...tes.org>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, iommu@...ts.linux.dev, 
	linux-arm-msm@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org, 
	Bjorn Andersson <andersson@...nel.org>, Konrad Dybcio <konradybcio@...nel.org>, 
	Arnaud Vrac <avrac@...ebox.fr>, Pierre-Hugues Husson <phhusson@...ebox.fr>, 
	Marijn Suijten <marijn.suijten@...ainline.org>, Caleb Connolly <caleb.connolly@...aro.org>
Subject: Re: [PATCH 2/2] arm64: dts: qcom: msm8998: add
 qcom,msm8998-lpass-smmu compatible

On Mon, Aug 19, 2024 at 02:59:36PM GMT, Marc Gonzalez wrote:
> The msm8998 LPASS SMMU requires special treatment, because FW reserves
> the last context bank for its own use.
> 
> Signed-off-by: Marc Gonzalez <mgonzalez@...ebox.fr>
> ---
>  arch/arm64/boot/dts/qcom/msm8998.dtsi | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/msm8998.dtsi b/arch/arm64/boot/dts/qcom/msm8998.dtsi
> index 1537e42fa03ca..f169f2dd281c3 100644
> --- a/arch/arm64/boot/dts/qcom/msm8998.dtsi
> +++ b/arch/arm64/boot/dts/qcom/msm8998.dtsi
> @@ -1616,7 +1616,7 @@ gpucc: clock-controller@...5000 {
>  		};
>  
>  		lpass_q6_smmu: iommu@...0000 {
> -			compatible = "qcom,msm8998-smmu-v2", "qcom,smmu-v2";
> +			compatible = "qcom,msm8998-lpass-smmu", "qcom,msm8998-smmu-v2", "qcom,smmu-v2";

Please also update the bindings.

>  			reg = <0x05100000 0x40000>;
>  			clocks = <&gcc HLOS1_VOTE_LPASS_ADSP_SMMU_CLK>;
>  			clock-names = "iface";
> 
> -- 
> 2.34.1
> 

-- 
With best wishes
Dmitry