linux-kernel - Re: [RFT PATCH] arm64: dts: qcom: sc8280xp: remove GCC from CX power domain

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Message-ID: <ddc1153f-6b73-4c37-8b36-891a84ace081@linaro.org>
Date:   Mon, 2 Jan 2023 09:42:51 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Bjorn Andersson <andersson@...nel.org>
Cc:     Andy Gross <agross@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [RFT PATCH] arm64: dts: qcom: sc8280xp: remove GCC from CX power
 domain

On 30/12/2022 18:16, Bjorn Andersson wrote:
> On Fri, Dec 30, 2022 at 04:55:02PM +0100, Krzysztof Kozlowski wrote:
>> Bindings do not allow power-domain property in GCC clock controller and
>> documentation does not indicate that GCC is part of VDD_CX.
>>
>> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
>>
>> ---
>>
>> Maybe the bindings should be fixed? Maybe this was added as workaround?
>> Anyway looking at documentation I do not see such relation, except
>> downstream vdd_cx-supply (which is the same as in other SoCs and we do
>> not represent it in upstream).
> 
> The GCC itself is powered by CX and the GDSC power-domains exposed by
> GCC are powered by CX.
> 
> It's fairly recently that we started attempting to scale CX - and
> attempted to suspend things. But this is probably how it should be
> represented on all platforms.
> 
> 
> So let's fix the binding instead.

Sure.

Best regards,
Krzysztof