@@ -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>;
+ };
+ };
+ };
+ };
};
Enable CPU thermal throttling on Tegra20 Ventana board. Signed-off-by: Dmitry Osipenko <digetx@gmail.com> --- arch/arm/boot/dts/tegra20-ventana.dts | 41 +++++++++++++++++++++++++-- 1 file changed, 39 insertions(+), 2 deletions(-)