linux-kernel - Re: [PATCH 3/4] arm64: dts: qcom: sc7280: Fixup the cpufreq node

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Date:   Mon, 06 Sep 2021 08:50:36 +0530
From:   Sibi Sankar <sibis@...eaurora.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Matthias Kaehlcke <mka@...omium.org>, sboyd@...nel.org,
        robh+dt@...nel.org, viresh.kumar@...aro.org, agross@...nel.org,
        rjw@...ysocki.net, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org, dianders@...omium.org,
        tdas@...eaurora.org
Subject: Re: [PATCH 3/4] arm64: dts: qcom: sc7280: Fixup the cpufreq node

On 2021-08-31 22:34, Bjorn Andersson wrote:
> On Tue 31 Aug 08:30 PDT 2021, Matthias Kaehlcke wrote:
> 
>> On Thu, Jul 29, 2021 at 11:34:44PM +0530, Sibi Sankar wrote:
>> > Fixup the register regions used by the cpufreq node on SC7280 SoC to
>> > support per core L3 DCVS.
>> >
>> > Fixes: 7dbd121a2c58 ("arm64: dts: qcom: sc7280: Add cpufreq hw node")
>> > Signed-off-by: Sibi Sankar <sibis@...eaurora.org>
>> 
>> This patch landed in the Bjorn's tree, however the corresponding 
>> driver
>> change ("cpufreq: qcom: Re-arrange register offsets to support per 
>> core
>> L3 DCVS" / 
>> https://patchwork.kernel.org/project/linux-arm-msm/patch/1627581885-32165-3-git-send-email-sibis@codeaurora.org/)
>> did not land in any maintainer tree yet AFAIK. IIUC the DT change 
>> alone
>> breaks cpufreq since the changed register regions require the changed
>> offset in the cpufreq driver.
>> 
> 
> Thanks for the note Matthias, it must have slipped by as I scraped the
> inbox for things that looked ready.
> 
> I'm actually not in favor of splitting these memory blocks in DT to
> facilitate the Linux implementation of splitting that in multiple
> drivers...
> 
> But I've not been following up on that discussion.
> 
> Regards,
> Bjorn
> 
>> Sibi, please confirm or clarify that my concern is unwarranted.

Let's drop the patch asap as it breaks
SC7280 cpufreq on lnext without the driver
changes.

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