linux-kernel - Re: [PATCH v2 1/7] arm64: dts: qcom: sm8450: add spmi node

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Date:   Thu, 29 Dec 2022 11:45:48 +0100
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        linux-arm-msm@...r.kernel.org, andersson@...nel.org,
        agross@...nel.org
Cc:     marijn.suijten@...ainline.org, Vinod Koul <vkoul@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/7] arm64: dts: qcom: sm8450: add spmi node



On 29.12.2022 11:42, Krzysztof Kozlowski wrote:
> On 29/12/2022 11:32, Konrad Dybcio wrote:
>> From: Vinod Koul <vkoul@...nel.org>
>>
>> Add the spmi bus as found in the SM8450 SoC
>>
>> Signed-off-by: Vinod Koul <vkoul@...nel.org>
>> Reviewed-by: Konrad Dybcio <konrad.dybcio@...ainline.org>
>> [Konrad: 0x0 -> 0, move #cells down, make reg-names a vertical list]
>> Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
>> ---
>> v1 -> v2:
>> No changes
>>
>>  arch/arm64/boot/dts/qcom/sm8450.dtsi | 22 ++++++++++++++++++++++
>>  1 file changed, 22 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/qcom/sm8450.dtsi b/arch/arm64/boot/dts/qcom/sm8450.dtsi
>> index 570475040d95..b9b59c5223eb 100644
>> --- a/arch/arm64/boot/dts/qcom/sm8450.dtsi
>> +++ b/arch/arm64/boot/dts/qcom/sm8450.dtsi
>> @@ -2715,6 +2715,28 @@ aoss_qmp: power-controller@...0000 {
>>  			#clock-cells = <0>;
>>  		};
>>  
>> +		spmi_bus: spmi@...d000 {
> 
> Hmm looks different than reg.
> 
>> +			compatible = "qcom,spmi-pmic-arb";
>> +			reg = <0 0x0c400000 0 0x00003000>,
>> +			      <0 0x0c500000 0 0x00400000>,
>> +			      <0 0x0c440000 0 0x00080000>,
>> +			      <0 0x0c4c0000 0 0x00010000>,
>> +			      <0 0x0c42d000 0 0x00010000>;
> x
Hm, my guess would be that Vinod chose to put the "cnfg" reg
instead of "core" in the unit address, as 8450 has 2 SPMI bus
hosts and they both share the core reg, so it would have been
impossible to have two spmi@...e nodes..

Konrad
> 
> Best regards,
> Krzysztof
>