Commit 3744c7d8 authored by Dmitry Osipenko's avatar Dmitry Osipenko Committed by Thierry Reding
Browse files

ARM: tegra: ventana: Support CPU thermal throttling 



Enable CPU thermal throttling on Tegra20 Ventana board.

Signed-off-by: default avatarDmitry Osipenko <digetx@gmail.com>
Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
parent 82d3d459

arch/arm/boot/dts/tegra20-ventana.dts

+39 −2
Original line number Diff line number Diff line
@@ -2,6 +2,7 @@ 
/dts-v1/;



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

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

#include "tegra20.dtsi"

#include "tegra20-cpu-opp.dtsi"

#include "tegra20-cpu-opp-microvolt.dtsi"
@@ -528,9 +529,10 @@ ldo_rtc { 
			};

		};



		temperature-sensor@4c {

		nct1008: temperature-sensor@4c {

			compatible = "onnn,nct1008";

			reg = <0x4c>;

			#thermal-sensor-cells = <1>;

		};

	};
@@ -614,11 +616,13 @@ cpus { 
		cpu0: cpu@0 {

			cpu-supply = <&vdd_cpu>;

			operating-points-v2 = <&cpu0_opp_table>;

			#cooling-cells = <2>;

		};



		cpu@1 {

		cpu1: cpu@1 {

			cpu-supply = <&vdd_cpu>;

			operating-points-v2 = <&cpu0_opp_table>;

			#cooling-cells = <2>;

		};

	};
@@ -716,4 +720,37 @@ sound { 
			 <&tegra_car TEGRA20_CLK_CDEV1>;

		clock-names = "pll_a", "pll_a_out0", "mclk";

	};



	thermal-zones {

		cpu-thermal {

			polling-delay-passive = <1000>; /* milliseconds */

			polling-delay = <5000>; /* milliseconds */



			thermal-sensors = <&nct1008 1>;



			trips {

				trip0: cpu-alert0 {

					/* start throttling at 50C */

					temperature = <50000>;

					hysteresis = <200>;

					type = "passive";

				};



				trip1: cpu-crit {

					/* shut down at 60C */

					temperature = <60000>;

					hysteresis = <2000>;

					type = "critical";

				};

			};



			cooling-maps {

				map0 {

					trip = <&trip0>;

					cooling-device = <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,

							 <&cpu1 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;

				};

			};

		};

	};

};