linux-kernel - Re: [PATCH v2 00/13] mailbox/arm64/ qcom: rework compatibles for fallback

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Date:   Thu, 16 Mar 2023 07:52:31 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Jassi Brar <jassisinghbrar@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Manivannan Sadhasivam <mani@...nel.org>,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v2 00/13] mailbox/arm64/ qcom: rework compatibles for
 fallback

On 14/03/2023 13:16, Dmitry Baryshkov wrote:
> On 14/03/2023 10:09, Krzysztof Kozlowski wrote:
>> Hi,
>>
>> Changes since v1
>> ================
>> 1. Rebase
>> 2. Make msm8994 fallback for several variants, not msm8953, because the latter
>>     actually might take some clocks.
> 
> Although the approach looks correct, I think that in some cases it tries 
> to mark devices compatible judging from the current driver, not from the 
> hardware itself.

Which is what compatibility is about...

> 
> For the reference, on msm8994 the apcs is a clock controller for the l2 
> clocks (which we do not support yet). If I'm not mistaken, on msm8976 
> the apcs region contains a mux for the cluster1 clocks. On sdm630/660 
> the apcs region also seems to be involved in CPU clocks scaling.

The question is this means they are incompatible?

> 
> On the other hand, the sc7180/sm8150 part seems logical.
> 


Best regards,
Krzysztof