linux-kernel - Re: [PATCH 1/4] arm64: dts: qcom: sc7180: lazor: Simplify disabling of charger thermal zone

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Date:   Fri, 5 Mar 2021 12:11:12 -0800
From:   Matthias Kaehlcke <mka@...omium.org>
To:     Doug Anderson <dianders@...omium.org>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/4] arm64: dts: qcom: sc7180: lazor: Simplify disabling
 of charger thermal zone

On Fri, Mar 05, 2021 at 10:36:49AM -0800, Doug Anderson wrote:
> Hi,
> 
> On Thu, Mar 4, 2021 at 10:04 AM Matthias Kaehlcke <mka@...omium.org> wrote:
> >
> > Commit f73558cc83d1 ("arm64: dts: qcom: sc7180: Disable charger
> > thermal zone for lazor") disables the charger thermal zone for
> > specific lazor revisions due to an unsupported thermistor type.
> > The initial idea was to disable the thermal zone for older
> > revisions and leave it enabled for newer ones that use a
> > supported thermistor. Finally the thermistor won't be changed
> > on newer revisions, hence the thermal zone should be disabled
> > for all lazor (and limozeen) revisions. Instead of disabling
> > it per revision do it once in the shared .dtsi for lazor.
> >
> > Signed-off-by: Matthias Kaehlcke <mka@...omium.org>
> > ---
> >
> >  arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r0.dts | 9 ---------
> >  arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r1.dts | 9 ---------
> >  arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r3.dts | 9 ---------
> >  arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor.dtsi   | 9 +++++++++
> >  4 files changed, 9 insertions(+), 27 deletions(-)
> >
> > diff --git a/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r0.dts b/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r0.dts
> > index 5c997cd90069..30e3e769d2b4 100644
> > --- a/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r0.dts
> > +++ b/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r0.dts
> > @@ -14,15 +14,6 @@ / {
> >         compatible = "google,lazor-rev0", "qcom,sc7180";
> >  };
> >
> > -/*
> > - * Lazor is stuffed with a 47k NTC as charger thermistor which currently is
> > - * not supported by the PM6150 ADC driver. Disable the charger thermal zone
> > - * to avoid using bogus temperature values.
> > - */
> > -&charger_thermal {
> > -       status = "disabled";
> > -};
> > -
> >  &pp3300_hub {
> >         /* pp3300_l7c is used to power the USB hub */
> >         /delete-property/regulator-always-on;
> > diff --git a/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r1.dts b/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r1.dts
> > index d9fbcc7bc5bd..c2ef06367baf 100644
> > --- a/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r1.dts
> > +++ b/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r1.dts
> > @@ -14,15 +14,6 @@ / {
> >         compatible = "google,lazor-rev1", "google,lazor-rev2", "qcom,sc7180";
> >  };
> >
> > -/*
> > - * Lazor is stuffed with a 47k NTC as charger thermistor which currently is
> > - * not supported by the PM6150 ADC driver. Disable the charger thermal zone
> > - * to avoid using bogus temperature values.
> > - */
> > -&charger_thermal {
> > -       status = "disabled";
> > -};
> > -
> >  &pp3300_hub {
> >         /* pp3300_l7c is used to power the USB hub */
> >         /delete-property/regulator-always-on;
> > diff --git a/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r3.dts b/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r3.dts
> > index 19e69adb9e04..1b9d2f46359e 100644
> > --- a/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r3.dts
> > +++ b/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r3.dts
> > @@ -13,12 +13,3 @@ / {
> >         model = "Google Lazor (rev3+)";
> >         compatible = "google,lazor", "qcom,sc7180";
> >  };
> > -
> > -/*
> > - * Lazor is stuffed with a 47k NTC as charger thermistor which currently is
> > - * not supported by the PM6150 ADC driver. Disable the charger thermal zone
> > - * to avoid using bogus temperature values.
> > - */
> > -&charger_thermal {
> > -       status = "disabled";
> > -};
> > diff --git a/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor.dtsi b/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor.dtsi
> > index 89e5cd29ec09..aa2c4a9098db 100644
> > --- a/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor.dtsi
> > +++ b/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor.dtsi
> > @@ -58,6 +58,15 @@ ap_ts: touchscreen@10 {
> >         };
> >  };
> >
> > +/*
> > + * Lazor is stuffed with a 47k NTC as charger thermistor which currently is
> > + * not supported by the PM6150 ADC driver. Disable the charger thermal zone
> > + * to avoid using bogus temperature values.
> > + */
> > +&charger_thermal {
> > +       status = "disabled";
> > +};
> > +
> >  /* PINCTRL - modifications to sc7180-trogdor.dtsi */
> >
> >  &ts_reset_l {
> 
> The idea is right, but I'm having a hard time figuring out what tree
> you posted your patch against. You said you did it atop my "v2" series
> [1], right?  ...but the "sc7180-trogdor-lazor.dtsi" really doesn't
> match. In my tree, for instance, right above the PINCTRL comment
> should be:
> 
> &wifi {
>   qcom,ath10k-calibration-variant = "GO_LAZOR";
> };
> 
> ...but that's definitely not what's there in whatever your patch was
> written against... It seems like you're also missing the panel and
> trackpad nodes...
> 
> [1] https://patchwork.kernel.org/project/linux-arm-msm/list/?series=440315

You got me! I was too lazy to pick all 13 patches, since most of them are
irrelevant for this series, but apparently I missed some that are. I guess
I'll pick them all for v2 ...