linux-kernel - Re: [PATCH 09/10] arm64: dts: qcom: sm8550: Explicitly describe the IPA IMEM slice

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Message-ID: <50d1c481-e431-4544-a034-f7d0e78ff272@linaro.org>
Date: Wed, 4 Jun 2025 10:00:04 +0200
From: neil.armstrong@...aro.org
To: Konrad Dybcio <konradybcio@...nel.org>,
 Bjorn Andersson <andersson@...nel.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, cros-qcom-dts-watchers@...omium.org,
 Sai Prakash Ranjan <quic_saipraka@...cinc.com>
Cc: Marijn Suijten <marijn.suijten@...ainline.org>,
 linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Subject: Re: [PATCH 09/10] arm64: dts: qcom: sm8550: Explicitly describe the
 IPA IMEM slice

On 23/05/2025 01:18, Konrad Dybcio wrote:
> From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
> 
> As part of stepping away from crazy hardcoding in the driver, move
> define the slice explicitly and pass it to the IPA node.
> 
> Signed-off-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
> ---
>   arch/arm64/boot/dts/qcom/sm8550.dtsi | 16 ++++++++++++++++
>   1 file changed, 16 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sm8550.dtsi b/arch/arm64/boot/dts/qcom/sm8550.dtsi
> index 71a7e3b57ecedd86d798e71b781451fe11f9c1ce..17d755daba4141d3a8716cd6ff4483c34dc0f660 100644
> --- a/arch/arm64/boot/dts/qcom/sm8550.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sm8550.dtsi
> @@ -2659,6 +2659,8 @@ &mc_virt SLAVE_EBI1 QCOM_ICC_TAG_ALWAYS>,
>   			qcom,smem-state-names = "ipa-clock-enabled-valid",
>   						"ipa-clock-enabled";
>   
> +			sram = <&ipa_modem_tables>;
> +
>   			status = "disabled";
>   		};
>   
> @@ -4737,6 +4739,20 @@ data-pins {
>   			};
>   		};
>   
> +		sram@...80000 {
> +			compatible = "qcom,sm8350-imem", "syscon", "simple-mfd";
> +			reg = <0 0x14680000 0 0x2c000>;
> +
> +			#address-cells = <1>;
> +			#size-cells = <1>;
> +
> +			ranges = <0 0 0x14680000 0x2c000>;
> +
> +			ipa_modem_tables: modem-tables@...0 {
> +				reg = <0x8000 0x2000>;
> +			};
> +		};
> +
>   		apps_smmu: iommu@...00000 {
>   			compatible = "qcom,sm8550-smmu-500", "qcom,smmu-500", "arm,mmu-500";
>   			reg = <0 0x15000000 0 0x100000>;
> 

Reviewed-by: Neil Armstrong <neil.armstrong@...aro.org>