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: Claudiu Beznea <claudiu.beznea@xxxxxxxxxxxxx>
---
arch/arm/boot/dts/sama7g5.dtsi | 42 ++++++++++++++++++++++++++++++++++
1 file changed, 42 insertions(+)
diff --git a/arch/arm/boot/dts/sama7g5.dtsi b/arch/arm/boot/dts/sama7g5.dtsi
index 52829be04427..fb517f9aff30 100644
--- a/arch/arm/boot/dts/sama7g5.dtsi
+++ b/arch/arm/boot/dts/sama7g5.dtsi
@@ -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";
--
2.34.1
