Commit 12045a7a authored by Claudiu Beznea's avatar Claudiu Beznea
Browse files

ARM: dts: at91: sama7g5: add thermal zones node 



Add thermal zones node with its associated trips and cooling-maps.
It uses CPUFreq as cooling device for temperatures in the interval
[90, 100) degrees Celsius and describe the temperature of 100 degrees
Celsius as critical temperature. System will be is shutting down when
reaching critical temperature.

Signed-off-by: default avatarClaudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20221026124114.985876-7-claudiu.beznea@microchip.com
parent 65d88152

arch/arm/boot/dts/sama7g5.dtsi

+42 −0
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ 
#include <dt-bindings/gpio/gpio.h>

#include <dt-bindings/mfd/at91-usart.h>

#include <dt-bindings/nvmem/microchip,sama7g5-otpc.h>

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



/ {

	model = "Microchip SAMA7G5 family SoC";
@@ -36,6 +37,7 @@ cpu0: cpu@0 { 
			clocks = <&pmc PMC_TYPE_CORE PMC_CPUPLL>;

			clock-names = "cpu";

			operating-points-v2 = <&cpu_opp_table>;

			#cooling-cells = <2>; /* min followed by max */

		};

	};
@@ -74,6 +76,46 @@ opp-1000000002 { 
		};

	};



	thermal-zones {

		cpu_thermal: cpu-thermal {

			polling-delay-passive = <1000>;

			polling-delay = <5000>;

			thermal-sensors = <&thermal_sensor>;



			trips {

				cpu_normal: cpu-alert0 {

					temperature = <90000>;

					hysteresis = <0>;

					type = "passive";

				};



				cpu_hot: cpu-alert1 {

					temperature = <95000>;

					hysteresis = <0>;

					type = "passive";

				};



				cpu_critical: cpu-critical {

					temperature = <100000>;

					hysteresis = <0>;

					type = "critical";

				};

			};



			cooling-maps {

				map0 {

					trip = <&cpu_normal>;

					cooling-device = <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;

				};



				map1 {

					trip = <&cpu_hot>;

					cooling-device = <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;

				};

			};

		};

	};



	clocks {

		slow_xtal: slow_xtal {

			compatible = "fixed-clock";