linux-kernel - Re: [PATCH 0/5] thermal: multi-sensor aggregation support

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Message-ID: <c1c14ada-c0bf-4353-a8ba-7b3a2fb6d971@linaro.org>
Date: Thu, 28 Nov 2024 18:38:12 +0100
From: Daniel Lezcano <daniel.lezcano@...aro.org>
To: Nicolas Pitre <nico@...xnic.net>, "Rafael J . Wysocki"
 <rafael@...nel.org>, linux-pm@...r.kernel.org,
 linux-mediatek@...ts.infradead.org, devicetree@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, Alexandre Bailon <abailon@...libre.com>
Subject: Re: [PATCH 0/5] thermal: multi-sensor aggregation support

Hi Nicolas,

On 27/11/2024 23:05, Nicolas Pitre wrote:
> Gentle ping, feedback appreciated.

I'm currently reviewing the series.

We have been discussing this feature since a long time and multiple 
times at different plumbers without any progress since then. So thank 
you for proposing an implementation of this feature.

I have some concerns regarding the approach I will raise tomorrow.

Thanks

   -- Daniel

> On Tue, 12 Nov 2024, Nicolas Pitre wrote:
> 
>> This series provides support for thermal aggregation of multiple sensors.
>> The "one sensor per zone" model is preserved for all its advantages.
>> Aggregation is performed via the creation of a special zone whose purpose
>> consists in aggregating its associated primary zones using a weighted
>> average.
>>
>> Motivation for this work stems from use cases where multiple sensors are
>> contained within the same performance domain. In such case it is preferable
>> to apply thermal mitigation while considering all such sensors as a whole.
>>
>> Previous incarnation by Alexandre Bailon can be found here:
>> https://patchwork.kernel.org/project/linux-pm/cover/20240613132410.161663-1-abailon@baylibre.com/
>>
>> diffstat:
>>   .../bindings/thermal/thermal-zones.yaml       |   5 +-
>>   arch/arm64/boot/dts/mediatek/mt8195.dtsi      | 210 +-----
>>   drivers/thermal/Kconfig                       |  27 +
>>   drivers/thermal/thermal_core.c                | 643 ++++++++++++++++++
>>   drivers/thermal/thermal_core.h                |  14 +
>>   drivers/thermal/thermal_of.c                  |  86 ++-
>>   6 files changed, 780 insertions(+), 205 deletions(-)
>>

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