linux-kernel - Re: [PATCH v12 2/2] arm64: dts: qcom: ipq5018: Add tsens node

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Message-ID: <9d966b32-d5ce-4262-b99e-900085648230@oss.qualcomm.com>
Date: Wed, 11 Jun 2025 17:06:21 +0200
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: george.moussalem@...look.com, Amit Kucheria <amitk@...nel.org>,
        Thara Gopinath <thara.gopinath@...il.com>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Zhang Rui <rui.zhang@...el.com>, Lukasz Luba <lukasz.luba@....com>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
 <conor+dt@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Sricharan Ramabadhran <quic_srichara@...cinc.com>
Cc: linux-arm-msm@...r.kernel.org, linux-pm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Dmitry Baryshkov <lumag@...nel.org>
Subject: Re: [PATCH v12 2/2] arm64: dts: qcom: ipq5018: Add tsens node

On 6/11/25 11:33 AM, George Moussalem via B4 Relay wrote:
> From: Sricharan Ramabadhran <quic_srichara@...cinc.com>
> 
> IPQ5018 has tsens V1.0 IP with 5 sensors, though 4 are in use.
> There is no RPM, so tsens has to be manually enabled. Adding the tsens
> and nvmem nodes and adding 4 thermal sensors (zones). The critical trip
> temperature is set to 120'C with an action to reboot.
> 
> In addition, adding a cooling device to the CPU thermal zone which uses
> CPU frequency scaling.
> 
> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> Signed-off-by: Sricharan Ramabadhran <quic_srichara@...cinc.com>
> Signed-off-by: George Moussalem <george.moussalem@...look.com>
> ---

[...]

> +		cpu-thermal {
> +			polling-delay-passive = <0>;

0 is also the default value for polling-delay-passive


> +			thermal-sensors = <&tsens 2>;
> +
> +			trips {
> +				cpu-critical {
> +					temperature = <120000>;
> +					hysteresis = <2>;
> +					type = "critical";
> +				};
> +
> +				cpu_alert: cpu-passive {
> +					temperature = <100000>;
> +					hysteresis = <2>;

that's 2 milicelcius, consider x1000

Konrad