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[PATCHv2,12/14] Thermal: Add a notification API

Message ID 1346041706-29642-13-git-send-email-durgadoss.r@intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

durgadoss.r@intel.com Aug. 27, 2012, 4:28 a.m. UTC
This patch adds a notification API which the sensor drivers'
can use to notify the framework. The framework then takes
care of the throttling according to the configured policy.

Signed-off-by: Durgadoss R <durgadoss.r@intel.com>
---
 drivers/thermal/thermal_sys.c |   18 ++++++++++++++++++
 include/linux/thermal.h       |    1 +
 2 files changed, 19 insertions(+)
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Patch

diff --git a/drivers/thermal/thermal_sys.c b/drivers/thermal/thermal_sys.c
index 3f96f3e..0f4cc04 100644
--- a/drivers/thermal/thermal_sys.c
+++ b/drivers/thermal/thermal_sys.c
@@ -1310,6 +1310,24 @@  void thermal_cdev_update(struct thermal_cooling_device *cdev)
 EXPORT_SYMBOL(thermal_cdev_update);
 
 /**
+ * notify_thermal_framework - Sensor drivers use this API to notify framework
+ * @tz:		thermal zone device
+ * @trip:	indicates which trip point has been crossed
+ *
+ * This function handles the trip events from sensor drivers. It starts
+ * throttling the cooling devices according to the policy configured.
+ * For CRITICAL and HOT trip points, this notifies the respective drivers,
+ * and does actual throttling for other trip points i.e ACTIVE and PASSIVE.
+ * The throttling policy is based on the configured platform data; if no
+ * platform data is provided, this uses the step_wise throttling policy.
+ */
+void notify_thermal_framework(struct thermal_zone_device *tz, int trip)
+{
+	handle_thermal_trip(tz, trip);
+}
+EXPORT_SYMBOL(notify_thermal_framework);
+
+/**
  * create_trip_attrs - create attributes for trip points
  * @tz:		the thermal zone device
  * @mask:	Writeable trip point bitmap.
diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index c7e0a4d..273ab0d 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -226,6 +226,7 @@  int get_tz_trend(struct thermal_zone_device *, int);
 struct thermal_instance *get_thermal_instance(struct thermal_zone_device *,
 		struct thermal_cooling_device *, int);
 void thermal_cdev_update(struct thermal_cooling_device *);
+void notify_thermal_framework(struct thermal_zone_device *, int);
 
 /*
  * The platform layer shall define a 'function' that provides the