linux-kernel - Re: [PATCH v10 6/6] arm64/dts/mt8195: Add temperature mitigation threshold

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Message-ID: <CAGuA+orPcSkztt_9vUmrSD8R0tifAtdHt=KsKVebJFXpe6zBzA@mail.gmail.com>
Date:   Fri, 13 Jan 2023 15:24:55 +0100
From:   Balsam CHIHI <bchihi@...libre.com>
To:     Matthias Brugger <matthias.bgg@...il.com>
Cc:     daniel.lezcano@...aro.org, rafael@...nel.org, amitk@...nel.org,
        rui.zhang@...el.com, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, khilman@...libre.com,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, james.lo@...iatek.com,
        rex-bc.chen@...iatek.com
Subject: Re: [PATCH v10 6/6] arm64/dts/mt8195: Add temperature mitigation threshold

On Fri, Jan 13, 2023 at 12:49 PM Matthias Brugger
<matthias.bgg@...il.com> wrote:
>
>
>
> On 12/01/2023 16:28, bchihi@...libre.com wrote:
> > From: Balsam CHIHI <bchihi@...libre.com>
> >
> > The mt8195 board has several hotspots around the CPUs. Specify the
> > targeted temperature threshold when to apply the mitigation and define
> > the associated cooling devices.
> >
> > Signed-off-by: Balsam CHIHI <bchihi@...libre.com>
> > ---
> >   arch/arm64/boot/dts/mediatek/mt8195.dtsi | 153 ++++++++++++++++++++---
> >   1 file changed, 137 insertions(+), 16 deletions(-)
> >
> > diff --git a/arch/arm64/boot/dts/mediatek/mt8195.dtsi b/arch/arm64/boot/dts/mediatek/mt8195.dtsi
> > index 683e5057d68d..0d6642603095 100644
> > --- a/arch/arm64/boot/dts/mediatek/mt8195.dtsi
> > +++ b/arch/arm64/boot/dts/mediatek/mt8195.dtsi
> > @@ -14,6 +14,7 @@
> >   #include <dt-bindings/pinctrl/mt8195-pinfunc.h>
> >   #include <dt-bindings/power/mt8195-power.h>
> >   #include <dt-bindings/reset/mt8195-resets.h>
> > +#include <dt-bindings/thermal/thermal.h>
> >   #include <dt-bindings/thermal/mediatek-lvts.h>
> >
> >   / {
> > @@ -2413,107 +2414,227 @@ dp_tx: dp-tx@...00000 {
> >
> >       thermal_zones: thermal-zones {
> >               cpu0-thermal {
> > -                     polling-delay = <0>;
> > -                     polling-delay-passive = <0>;
> > +                     polling-delay = <1000>;
> > +                     polling-delay-passive = <250>;
> >                       thermal-sensors = <&lvts_mcu MT819x_MCU_LITTLE_CPU0>;
>
> New line here please.
>
> >                       trips {
> > +                             cpu0_alert: trip-alert {
> > +                                     temperature = <85000>;
> > +                                     hysteresis = <2000>;
> > +                                     type = "passive";
> > +                             };
>
> New line here please and on other trip point definitions.
>

Hi Matthias,

Thank you for the feedback!
It will be added in the next version.

Best regards,
Balsam

> Regards,
> Matthias