linux-kernel - Re: [PATCH 2/2] arm64: dts: qcom: sm7225-fairphone-fp4: Add PM6150L thermals

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Message-ID: <CAA8EJpp5ZwJUJbbt7YG=1aAdGoScA+PTEf==7gJk3RUP2yu8uw@mail.gmail.com>
Date: Tue, 9 Jan 2024 12:26:43 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Konrad Dybcio <konrad.dybcio@...aro.org>
Cc: Luca Weiss <luca.weiss@...rphone.com>, Bjorn Andersson <andersson@...nel.org>, 
	Rob Herring <robh+dt@...nel.org>, 
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>, 
	~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org, 
	linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] arm64: dts: qcom: sm7225-fairphone-fp4: Add PM6150L thermals

On Tue, 9 Jan 2024 at 12:10, Konrad Dybcio <konrad.dybcio@...aro.org> wrote:
>
>
>
> On 1/5/24 15:54, Luca Weiss wrote:
> > Configure the thermals for the PA_THERM1, MSM_THERM, PA_THERM0,
> > RFC_CAM_THERM, CAM_FLASH_THERM and QUIET_THERM thermistors connected to
> > PM6150L.
> >
> > Due to hardware constraints we can only register 4 zones with
> > pm6150l_adc_tm, the other 2 we can register via generic-adc-thermal.
>
> Ugh.. so the ADC can support more inputs than the ADC_TM that was
> designed to ship alongside it can?

Yes. ADC_TM can support monitoring of 8 channels in total.

>
> And that's why the "generic-adc-thermal"-provided zones need to
> be polled?
>
> >
> > The trip points can really only be considered as placeholders, more
> > configuration with cooling etc. can be added later.
> >
> > Signed-off-by: Luca Weiss <luca.weiss@...rphone.com>
> > ---
> [...]
>
> I've read the sentence above, but..
> > +             sdm-skin-thermal {
> > +                     polling-delay-passive = <1000>;
> > +                     polling-delay = <5000>;
> > +                     thermal-sensors = <&msm_therm_sensor>;
> > +
> > +                     trips {
> > +                             active-config0 {
> > +                                     temperature = <125000>;
> > +                                     hysteresis = <1000>;
> > +                                     type = "passive";
>
> I don't fancy burnt fingers for dinner!
>
> Konrad
>


-- 
With best wishes
Dmitry