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Commit a5ce7a3d authored by Quentin Schulz's avatar Quentin Schulz Committed by Maxime Ripard
Browse files

ARM: sun8i: a33: add CPU thermal throttling 



This adds CPU thermal throttling for the Allwinner A33. It uses the
thermal sensor present in the SoC's GPADC.

Signed-off-by: default avatarQuentin Schulz <quentin.schulz@free-electrons.com>
Signed-off-by: default avatarMaxime Ripard <maxime.ripard@free-electrons.com>
parent a424f635

arch/arm/boot/dts/sun8i-a33.dtsi

+45 −0
Original line number Diff line number Diff line
@@ -43,6 +43,7 @@ 
 */



#include "sun8i-a23-a33.dtsi"

#include <dt-bindings/thermal/thermal.h>



/ {

	cpu0_opp_table: opp_table0 {
@@ -133,6 +134,7 @@ 
			clocks = <&ccu CLK_CPUX>;

			clock-names = "cpu";

			operating-points-v2 = <&cpu0_opp_table>;

			#cooling-cells = <2>;

		};



		cpu@2 {
@@ -388,6 +390,49 @@ 
			};

		};

	};



	thermal-zones {

		cpu_thermal {

			/* milliseconds */

			polling-delay-passive = <250>;

			polling-delay = <1000>;

			thermal-sensors = <&ths>;



			cooling-maps {

				map0 {

					trip = <&cpu_alert0>;

					cooling-device = <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;

				};

				map1 {

					trip = <&cpu_alert1>;

					cooling-device = <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;

				};

			};



			trips {

				cpu_alert0: cpu_alert0 {

					/* milliCelsius */

					temperature = <75000>;

					hysteresis = <2000>;

					type = "passive";

				};



				cpu_alert1: cpu_alert1 {

					/* milliCelsius */

					temperature = <90000>;

					hysteresis = <2000>;

					type = "hot";

				};



				cpu_crit: cpu_crit {

					/* milliCelsius */

					temperature = <110000>;

					hysteresis = <2000>;

					type = "critical";

				};

			};

		};

	};

};



&ccu {