linux-kernel - [PATCH v3 12/12] arm64: dts: qcom: sc8280xp-x13s: Add thermal zone support

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Thu,  3 Nov 2022 12:39:11 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To:     andersson@...nel.org
Cc:     konrad.dybcio@...ainline.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, johan+linaro@...nel.org,
        quic_jprakash@...cinc.com, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        steev@...i.org,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Subject: [PATCH v3 12/12] arm64: dts: qcom: sc8280xp-x13s: Add thermal zone support

Add thermal zone support by making use of the thermistor SYS_THERM6.
Based on experiments, this thermistor seems to reflect the actual
surface temperature of the laptop.

For the cooling device, all BIG CPU cores are throttle down to keep the
temperature at a sane level.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
---
 .../qcom/sc8280xp-lenovo-thinkpad-x13s.dts    | 46 +++++++++++++++++++
 1 file changed, 46 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts b/arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts
index fdeb7718a596..7d2b53ceaa54 100644
--- a/arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts
+++ b/arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts
@@ -29,6 +29,52 @@ backlight {
 		pinctrl-0 = <&edp_bl_en>, <&edp_bl_pwm>;
 	};
 
+	thermal-zones {
+		skin-temp-thermal {
+			polling-delay-passive = <250>;
+			polling-delay = <0>;
+			thermal-sensors = <&pmk8280_adc_tm 5>;
+
+			trips {
+				skin_temp_alert0: trip-point0 {
+					temperature = <55000>;
+					hysteresis = <1000>;
+					type = "passive";
+				};
+
+				skin_temp_alert1: trip-point1 {
+					temperature = <58000>;
+					hysteresis = <1000>;
+					type = "passive";
+				};
+
+				skin-temp-crit {
+					temperature = <73000>;
+					hysteresis = <1000>;
+					type = "critical";
+				};
+			};
+
+			cooling-maps {
+				map0 {
+					trip = <&skin_temp_alert0>;
+					cooling-device = <&CPU4 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+							 <&CPU5 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+							 <&CPU6 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+							 <&CPU7 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+				};
+
+				map1 {
+					trip = <&skin_temp_alert1>;
+					cooling-device = <&CPU4 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+							 <&CPU5 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+							 <&CPU6 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+							 <&CPU7 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+				};
+			};
+		};
+	};
+
 	vreg_edp_bl: regulator-edp-bl {
 		compatible = "regulator-fixed";
 
-- 
2.25.1