linux-kernel - Re: [PATCH 00/31] Clean up thermal zone polling-delay

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Date: Thu, 21 Mar 2024 18:25:30 +0100
From: Daniel Lezcano <daniel.lezcano@...aro.org>
To: Konrad Dybcio <konrad.dybcio@...aro.org>,
 Bjorn Andersson <andersson@...nel.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>, cros-qcom-dts-watchers@...omium.org
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH 00/31] Clean up thermal zone polling-delay

On 19/03/2024 17:13, Konrad Dybcio wrote:
> A trivial follow-up on the changes introduced in Commit 488164006a28
> ("thermal/of: Assume polling-delay(-passive) 0 when absent").
> 
> Should probably wait until v6.9-rc1 so that the patch in question is
> in the base tree, otherwise TZs will fail to register.
> 
> FWIW, Compile-tested only (except 8280).
> 
> Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
> ---

Are you sure these changes are correct. They are not related to commit 
488164006a28.

If the sensor has interrupt support, then it can specify:

	polling-delay = <0>;

As a zero polling value can be omitted in the DT then it can be removed.


Then when a trip point is crossed, the interrupt fires but then it must 
sample the temperature of the thermal zone to do the mitigation.

I doubt polling-delay-passive must be removed. The changes you 
introduced just disable the mitigation and that will lead to board wild 
reboots.

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