linux-kernel - Re: [PATCH v5 2/9] arm64: dts: allwinner: h6: Add thermal trip points/cooling map

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Message-ID: <CAJiuCcf_-2bSR61goL7vLXGSjNCsUYQ12j2JM3V4MJiSo3srZw@mail.gmail.com>
Date:   Mon, 20 Apr 2020 16:20:45 +0200
From:   Clément Péron <peron.clem@...il.com>
To:     Ondřej Jirman <megous@...ous.com>,
        Clément Péron <peron.clem@...il.com>,
        Maxime Ripard <mripard@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>, Rob Herring <robh+dt@...nel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        devicetree <devicetree@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-sunxi <linux-sunxi@...glegroups.com>
Subject: Re: [PATCH v5 2/9] arm64: dts: allwinner: h6: Add thermal trip
 points/cooling map

Hi Ondrej,

On Mon, 20 Apr 2020 at 15:46, Ondřej Jirman <megous@...ous.com> wrote:
>
> Hi,
>
> On Mon, Apr 20, 2020 at 03:00:14PM +0200, Clément Péron wrote:
> > From: Ondrej Jirman <megous@...ous.com>
> >
> > This enables passive cooling by down-regulating CPU voltage
> > and frequency.
>
> Does this not produce a lot of warnings for you during compilation?

I got flooded by lots of warnings, from sun50i-a64, stringray-usb,
ipq6018 and didn't see but two are from sun50i-h6.

The #cooling-cells property is missing for CPU.

Will send a patch for noticing.

Regard,
Clement



>
> regards,
>         o.
>
> > Signed-off-by: Ondrej Jirman <megous@...ous.com>
> > Signed-off-by: Clément Péron <peron.clem@...il.com>
> > ---
> >  arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi | 24 ++++++++++++++++++++
> >  1 file changed, 24 insertions(+)
> >
> > diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi
> > index 370e77b86fe1..60da1627772b 100644
> > --- a/arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi
> > +++ b/arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi
> > @@ -964,6 +964,30 @@
> >                       polling-delay-passive = <0>;
> >                       polling-delay = <0>;
> >                       thermal-sensors = <&ths 0>;
> > +
> > +                     trips {
> > +                             cpu_alert: cpu-alert {
> > +                                     temperature = <85000>;
> > +                                     hysteresis = <2000>;
> > +                                     type = "passive";
> > +                             };
> > +
> > +                             cpu-crit {
> > +                                     temperature = <100000>;
> > +                                     hysteresis = <0>;
> > +                                     type = "critical";
> > +                             };
> > +                     };
> > +
> > +                     cooling-maps {
> > +                             map0 {
> > +                                     trip = <&cpu_alert>;
> > +                                     cooling-device = <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> > +                                                      <&cpu1 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> > +                                                      <&cpu2 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> > +                                                      <&cpu3 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
> > +                             };
> > +                     };
> >               };
> >
> >               gpu-thermal {
> > --
> > 2.20.1
> >