linux-kernel - Re: [PATCH 2/4] arm64: dts: qcom: x1e80100: Apply consistent critical thermal shutdown

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Message-ID: <258bad12-38bc-48fb-8b74-9e87928b235c@oss.qualcomm.com>
Date: Thu, 20 Feb 2025 13:55:14 +0100
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Stephan Gerhold <stephan.gerhold@...aro.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>, Abel Vesa <abel.vesa@...aro.org>,
        Rajendra Nayak <quic_rjendra@...cinc.com>,
        Akhil P Oommen <quic_akhilpo@...cinc.com>,
        Johan Hovold <johan@...nel.org>, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Neil Armstrong <neil.armstrong@...aro.org>
Subject: Re: [PATCH 2/4] arm64: dts: qcom: x1e80100: Apply consistent critical
 thermal shutdown

On 19.02.2025 12:36 PM, Stephan Gerhold wrote:
> The firmware configures the TSENS controller with a maximum temperature of
> 120°C. When reaching that temperature, the hardware automatically triggers
> a reset of the entire platform. Some of the thermal zones in x1e80100.dtsi
> use a critical trip point of 125°C. It's impossible to reach those.
> 
> It's preferable to shut down the system cleanly before reaching the
> hardware trip point. Make the critical temperature trip points consistent
> by setting all of them to 115°C and apply a consistent hysteresis.
> The ACPI tables also specify 115°C as critical shutdown temperature.
> 
> Cc: stable@...r.kernel.org
> Fixes: 4e915987ff5b ("arm64: dts: qcom: x1e80100: Enable tsens and thermal zone nodes")
> Signed-off-by: Stephan Gerhold <stephan.gerhold@...aro.org>
> ---

Reviewed-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>

Konrad