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-rw-r--r--dts/src/arm/exynos5422-cpu-thermal.dtsi46
1 files changed, 45 insertions, 1 deletions
diff --git a/dts/src/arm/exynos5422-cpu-thermal.dtsi b/dts/src/arm/exynos5422-cpu-thermal.dtsi
index 2b289d7c0d..3e4c4ad96d 100644
--- a/dts/src/arm/exynos5422-cpu-thermal.dtsi
+++ b/dts/src/arm/exynos5422-cpu-thermal.dtsi
@@ -16,7 +16,7 @@
thermal-zones {
cpu0_thermal: cpu0-thermal {
thermal-sensors = <&tmu_cpu0 0>;
- polling-delay-passive = <0>;
+ polling-delay-passive = <250>;
polling-delay = <0>;
trips {
cpu_alert0: cpu-alert-0 {
@@ -39,6 +39,23 @@
hysteresis = <0>; /* millicelsius */
type = "critical";
};
+ /*
+ * Exyunos542x support only 4 trip-points
+ * so for these polling mode is required.
+ * Start polling at temperature level of last
+ * interrupt-driven trip: cpu_alert2
+ */
+ cpu_alert3: cpu-alert-3 {
+ temperature = <70000>; /* millicelsius */
+ hysteresis = <10000>; /* millicelsius */
+ type = "passive";
+ };
+ cpu_alert4: cpu-alert-4 {
+ temperature = <85000>; /* millicelsius */
+ hysteresis = <10000>; /* millicelsius */
+ type = "passive";
+ };
+
};
cooling-maps {
map0 {
@@ -53,6 +70,33 @@
trip = <&cpu_alert2>;
cooling-device = <&fan0 2 3>;
};
+ /*
+ * When reaching cpu_alert3, reduce CPU
+ * by 2 steps. On Exynos5422/5800 that would
+ * be: 1500 MHz and 1100 MHz.
+ */
+ map3 {
+ trip = <&cpu_alert3>;
+ cooling-device = <&cpu0 0 2>;
+ };
+ map4 {
+ trip = <&cpu_alert3>;
+ cooling-device = <&cpu4 0 2>;
+ };
+
+ /*
+ * When reaching cpu_alert4, reduce CPU
+ * further, down to 600 MHz (11 steps for big,
+ * 7 steps for LITTLE).
+ */
+ map5 {
+ trip = <&cpu_alert4>;
+ cooling-device = <&cpu0 3 7>;
+ };
+ map6 {
+ trip = <&cpu_alert4>;
+ cooling-device = <&cpu4 3 11>;
+ };
};
};
};