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

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Message-ID: <CAD=FV=XHzwvudc4jABHVUC0OkKat-xdvo5yY2xRJ0VP5gds91w@mail.gmail.com>
Date:   Tue, 7 Sep 2021 12:14:08 -0700
From:   Doug Anderson <dianders@...omium.org>
To:     Sibi Sankar <sibis@...eaurora.org>
Cc:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        Matthias Kaehlcke <mka@...omium.org>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Andy Gross <agross@...nel.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org>,
        Linux PM <linux-pm@...r.kernel.org>,
        Taniya Das <tdas@...eaurora.org>
Subject: Re: [PATCH 3/4] arm64: dts: qcom: sc7280: Fixup the cpufreq node

Hi,

On Sun, Sep 5, 2021 at 8:20 PM Sibi Sankar <sibis@...eaurora.org> wrote:
>
> 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.

It's already landed so we need a revert:

https://lore.kernel.org/r/20210907121220.1.I08460f490473b70de0d768db45f030a4d5c17828@changeid/

-Doug