Commit 31863c52 authored by Manivannan Sadhasivam's avatar Manivannan Sadhasivam Committed by Bjorn Andersson
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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 throttled down to keep the
temperature at a sane level.

Signed-off-by: default avatarManivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: default avatarKonrad Dybcio <konrad.dybcio@somainline.org>
Signed-off-by: default avatarBjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221103095810.64606-13-manivannan.sadhasivam@linaro.org
parent 7c015134

arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts

+46 −0
Original line number Diff line number Diff line
@@ -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";