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[v3,3/9] ARM: dts: sun7i: Add cpu thermal zones to dtsi

Message ID 1421037249-28461-4-git-send-email-wens@csie.org (mailing list archive)
State Not Applicable, archived
Headers show

Commit Message

Chen-Yu Tsai Jan. 12, 2015, 4:34 a.m. UTC 
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@csie.org>
Acked-by: Eduardo Valentin <edubezval@gmail.com>
---

changes since v2:

    - Added Acked-by from Eduardo

changes since v1:

    - Use thermal dt bindings macros in cooling-device

---
 arch/arm/boot/dts/sun7i-a20.dtsi | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
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Patch

diff --git a/arch/arm/boot/dts/sun7i-a20.dtsi b/arch/arm/boot/dts/sun7i-a20.dtsi
index c2e964939991..61780b144745 100644
--- a/arch/arm/boot/dts/sun7i-a20.dtsi
+++ b/arch/arm/boot/dts/sun7i-a20.dtsi
@@ -50,6 +50,7 @@ 
 #include "skeleton.dtsi"
 
 #include <dt-bindings/interrupt-controller/arm-gic.h>
+#include <dt-bindings/thermal/thermal.h>
 
 #include <dt-bindings/dma/sun4i-a10.h>
 #include <dt-bindings/pinctrl/sun4i-a10.h>
@@ -116,6 +117,38 @@ 
 		};
 	};
 
+	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 = <75000>;
+					hysteresis = <2000>;
+					type = "passive";
+				};
+
+				cpu_crit: cpu_crit {
+					/* milliCelsius */
+					temperature = <100000>;
+					hysteresis = <2000>;
+					type = "critical";
+				};
+			};
+		};
+	};
+
 	memory {
 		reg = <0x40000000 0x80000000>;
 	};