linux-kernel - Re: [PATCH] arm64: dts: mediatek: mt8183: remove thermal zones without trips.

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Message-ID: <6e9c94e7-3f0b-83bd-b419-db6c002f7d98@baylibre.com>
Date:   Wed, 14 Sep 2022 21:44:24 +0200
From:   Amjad Ouled-Ameur <aouledameur@...libre.com>
To:     Matthias Brugger <matthias.bgg@...il.com>,
        Rob Herring <robh+dt@...nel.org>
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: dts: mediatek: mt8183: remove thermal zones
 without trips.

Hi Matthias,

Thank you for your review.

On 9/14/22 16:15, Matthias Brugger wrote:
>
>
> On 14/09/2022 15:13, Amjad Ouled-Ameur wrote:
>> Thermal zones without trip point are not registered by thermal core.
>>
>> tzts1 ~ tzts6 zones of mt8183 were intially introduced for test-purpose
>> only but are not supposed to remain on DT.
>>
>> Remove the zones above and keep only cpu_thermal.
>>
>
> My understanding is that this thermal zones exist but are not used. 
> DTS should describe the HW as it is, so I propose to add
> status = "disabled";
> to the zones.
>
Correct, they are unused unless for testing purposes. Thus, your 
suggestion of disabling them seems more relevant

than removal.


Regards,

Amjad

> Regards,
> Matthias
>
>> Signed-off-by: Amjad Ouled-Ameur <aouledameur@...libre.com>
>> ---
>>   arch/arm64/boot/dts/mediatek/mt8183.dtsi | 57 ------------------------
>>   1 file changed, 57 deletions(-)
>>
>> diff --git a/arch/arm64/boot/dts/mediatek/mt8183.dtsi 
>> b/arch/arm64/boot/dts/mediatek/mt8183.dtsi
>> index 9d32871973a2..f65fae8939de 100644
>> --- a/arch/arm64/boot/dts/mediatek/mt8183.dtsi
>> +++ b/arch/arm64/boot/dts/mediatek/mt8183.dtsi
>> @@ -1182,63 +1182,6 @@ THERMAL_NO_LIMIT
>>                       };
>>                   };
>>               };
>> -
>> -            /* The tzts1 ~ tzts6 don't need to polling */
>> -            /* The tzts1 ~ tzts6 don't need to thermal throttle */
>> -
>> -            tzts1: tzts1 {
>> -                polling-delay-passive = <0>;
>> -                polling-delay = <0>;
>> -                thermal-sensors = <&thermal 1>;
>> -                sustainable-power = <5000>;
>> -                trips {};
>> -                cooling-maps {};
>> -            };
>> -
>> -            tzts2: tzts2 {
>> -                polling-delay-passive = <0>;
>> -                polling-delay = <0>;
>> -                thermal-sensors = <&thermal 2>;
>> -                sustainable-power = <5000>;
>> -                trips {};
>> -                cooling-maps {};
>> -            };
>> -
>> -            tzts3: tzts3 {
>> -                polling-delay-passive = <0>;
>> -                polling-delay = <0>;
>> -                thermal-sensors = <&thermal 3>;
>> -                sustainable-power = <5000>;
>> -                trips {};
>> -                cooling-maps {};
>> -            };
>> -
>> -            tzts4: tzts4 {
>> -                polling-delay-passive = <0>;
>> -                polling-delay = <0>;
>> -                thermal-sensors = <&thermal 4>;
>> -                sustainable-power = <5000>;
>> -                trips {};
>> -                cooling-maps {};
>> -            };
>> -
>> -            tzts5: tzts5 {
>> -                polling-delay-passive = <0>;
>> -                polling-delay = <0>;
>> -                thermal-sensors = <&thermal 5>;
>> -                sustainable-power = <5000>;
>> -                trips {};
>> -                cooling-maps {};
>> -            };
>> -
>> -            tztsABB: tztsABB {
>> -                polling-delay-passive = <0>;
>> -                polling-delay = <0>;
>> -                thermal-sensors = <&thermal 6>;
>> -                sustainable-power = <5000>;
>> -                trips {};
>> -                cooling-maps {};
>> -            };
>>           };
>>             pwm0: pwm@...0e000 {