The core temperature sensor now supports thermal zones. Add a thermal
zone mapping for the cpus with passive cooling (cpufreq throttling).
Signed-off-by: Chen-Yu Tsai <wens@xxxxxxxx>
---
changes since v1:
- Use thermal dt bindings macros in cooling-device
---
arch/arm/boot/dts/sun4i-a10.dtsi | 34 ++++++++++++++++++++++++++++++++++
1 file changed, 34 insertions(+)
diff --git a/arch/arm/boot/dts/sun4i-a10.dtsi b/arch/arm/boot/dts/sun4i-a10.dtsi
index 7fb4e912f510..f0dc246dc69e 100644
--- a/arch/arm/boot/dts/sun4i-a10.dtsi
+++ b/arch/arm/boot/dts/sun4i-a10.dtsi
@@ -12,6 +12,8 @@
#include "skeleton.dtsi"
+#include <dt-bindings/thermal/thermal.h>
+
#include <dt-bindings/dma/sun4i-a10.h>
#include <dt-bindings/pinctrl/sun4i-a10.h>
@@ -67,6 +69,38 @@
};
};
+ thermal-zones {
+ cpu_thermal {
+ /* milliseconds */
+ polling-delay-passive = <250>;
+ polling-delay = <1000>;
+ thermal-sensors = <&rtp>;
+
+ cooling-maps {
+ map0 {
+ trip = <&cpu_alert0>;
+ cooling-device = <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+ };
+ };
+
+ trips {
+ cpu_alert0: cpu_alert0 {
+ /* milliCelsius */
+ temperature = <850000>;
+ hysteresis = <2000>;
+ type = "passive";
+ };
+
+ cpu_crit: cpu_crit {
+ /* milliCelsius */
+ temperature = <100000>;
+ hysteresis = <2000>;
+ type = "critical";
+ };
+ };
+ };
+ };
+
memory {
reg = <0x40000000 0x80000000>;
};
--
2.1.4
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