linux-kernel - Re: [PATCH] arm64: dts: qcom: sm8[56]50: Fix SPMI channels size

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Date: Wed, 21 Feb 2024 13:52:12 +0100
From: neil.armstrong@...aro.org
To: Abel Vesa <abel.vesa@...aro.org>, Bjorn Andersson <andersson@...nel.org>,
 Konrad Dybcio <konrad.dybcio@...aro.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: dts: qcom: sm8[56]50: Fix SPMI channels size

Hi,

On 20/02/2024 18:04, Abel Vesa wrote:
> The actual size of the channels registers region is 4MB, according to the
> documentation. This issue was not caught until now because the driver was
> supposed to allow same regions being mapped multiple times for supporting
> multiple buses. Thie driver is using platform_get_resource_byname() and
> devm_ioremap() towards that purpose, which intentionally avoids
> devm_request_mem_region() altogether.
> 
> Signed-off-by: Abel Vesa <abel.vesa@...aro.org>
> ---
>   arch/arm64/boot/dts/qcom/sm8550.dtsi | 2 +-
>   arch/arm64/boot/dts/qcom/sm8650.dtsi | 2 +-
>   2 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sm8550.dtsi b/arch/arm64/boot/dts/qcom/sm8550.dtsi
> index 7474cddf7ad3..3904348075f6 100644
> --- a/arch/arm64/boot/dts/qcom/sm8550.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sm8550.dtsi
> @@ -3318,7 +3318,7 @@ sram@...0000 {
>   		spmi_bus: spmi@...0000 {
>   			compatible = "qcom,spmi-pmic-arb";
>   			reg = <0 0x0c400000 0 0x3000>,
> -			      <0 0x0c500000 0 0x4000000>,
> +			      <0 0x0c500000 0 0x400000>,
>   			      <0 0x0c440000 0 0x80000>,
>   			      <0 0x0c4c0000 0 0x20000>,
>   			      <0 0x0c42d000 0 0x4000>;
> diff --git a/arch/arm64/boot/dts/qcom/sm8650.dtsi b/arch/arm64/boot/dts/qcom/sm8650.dtsi
> index d488b3b3265e..260eda81b743 100644
> --- a/arch/arm64/boot/dts/qcom/sm8650.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sm8650.dtsi
> @@ -3747,7 +3747,7 @@ sram@...0000 {
>   		spmi_bus: spmi@...0000 {
>   			compatible = "qcom,spmi-pmic-arb";
>   			reg = <0 0x0c400000 0 0x3000>,
> -			      <0 0x0c500000 0 0x4000000>,
> +			      <0 0x0c500000 0 0x400000>,
>   			      <0 0x0c440000 0 0x80000>,
>   			      <0 0x0c4c0000 0 0x20000>,
>   			      <0 0x0c42d000 0 0x4000>;
> 
> ---
> base-commit: 2d5c7b7eb345249cb34d42cbc2b97b4c57ea944e
> change-id: 20240220-dts-qcom-sm8550-fix-spmi-chnls-size-b8e6323fecc0
> 
> Best regards,

I confirm the value, but I think you should split it in 2 and add Fixes tags

Take my:
Reviewed-by: Neil Armstrong <neil.armstrong@...aro.org>
if you re-spin.

Neil