linux-kernel - Re: [PATCH v2 0/3] cpufreq: Add basic cpufreq scaling for Qualcomm MSM8909

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Message-ID: <ZTEzuz7VrDGIoR7H@gerhold.net>
Date:   Thu, 19 Oct 2023 15:48:43 +0200
From:   Stephan Gerhold <stephan@...hold.net>
To:     Viresh Kumar <viresh.kumar@...aro.org>
Cc:     Stephan Gerhold <stephan.gerhold@...nkonzept.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Ilia Lin <ilia.lin@...nel.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>, linux-pm@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, Ulf Hansson <ulf.hansson@...aro.org>,
        stable@...r.kernel.org
Subject: Re: [PATCH v2 0/3] cpufreq: Add basic cpufreq scaling for Qualcomm
 MSM8909

On Thu, Oct 19, 2023 at 03:53:42PM +0530, Viresh Kumar wrote:
> On 19-10-23, 11:46, Viresh Kumar wrote:
> > On 18-10-23, 10:06, Stephan Gerhold wrote:
> > > Add the necessary definitions to the qcom-cpufreq-nvmem driver to
> > > support basic cpufreq scaling on the Qualcomm MSM8909 SoC. In practice
> > > the necessary power domains vary depending on the actual PMIC the SoC
> > > was combined with. With PM8909 the VDD_APC power domain is shared with
> > > VDD_CX so the RPM firmware handles all voltage adjustments, while with
> > > PM8916 and PM660 Linux is responsible to do adaptive voltage scaling
> > > of a dedicated CPU regulator using CPR.
> > > 
> > > Signed-off-by: Stephan Gerhold <stephan.gerhold@...nkonzept.com>
> > 
> > Applied patch 1 and 3. Thanks.
> 
> Hi Stephan,
> 
> I think your platform has exactly what I am looking for. Can you
> please help me test this, before it lands into linux-next :)
> 
> https://lore.kernel.org/cover.1697710527.git.viresh.kumar@linaro.org
> 

Sure, I will try to test it until end of next week, with both single and
multiple power domains assigned to the CPU. Is there something
particular you would like me to look for? Or just that the scaling still
works correctly as before?

Stephan