-----Original Message-----
From: R, Durgadoss
Sent: Monday, August 27, 2012 7:28 AM
To: lenb@kernel.org; Zhang, Rui
Cc: linux-acpi@vger.kernel.org; eduardo.valentin@ti.com; R, Durgadoss
Subject: [PATCHv2 03/14] Thermal: Add get trend, get instance API's to
thermal_sys
Importance: High

This patch adds the following API's to thermal_sys.c, that can be used
by other Thermal drivers.
 * get_tz_trend: obtain the trend of the given thermal zone
 * get_thermal_instance: obtain the instance corresponding
   to the given tz, cdev and the trip point.

Signed-off-by: Durgadoss R <redacted>
---
 drivers/thermal/thermal_sys.c |   40
++++++++++++++++++++++++++++++++++++++++
 include/linux/thermal.h       |    4 ++++
 2 files changed, 44 insertions(+)

diff --git a/drivers/thermal/thermal_sys.c

b/drivers/thermal/thermal_sys.c index 0e71b00..5e141b5 100644

--- a/drivers/thermal/thermal_sys.c
+++ b/drivers/thermal/thermal_sys.c

@@ -82,6 +82,46 @@ static void release_idr(struct idr *idr, struct

mutex *lock, int id)
 		mutex_unlock(lock);
 }

+int get_tz_trend(struct thermal_zone_device *tz, int trip) {
+	enum thermal_trend trend;
+
+	if (!tz->ops->get_trend || tz->ops->get_trend(tz, trip, &trend))
{
+		if (tz->temperature > tz->last_temperature)
+			trend = THERMAL_TREND_RAISING;
+		else if (tz->temperature < tz->last_temperature)
+			trend = THERMAL_TREND_DROPPING;
+		else
+			trend = THERMAL_TREND_STABLE;
+	}
+
+	return trend;
+}
+EXPORT_SYMBOL(get_tz_trend);
+
+struct thermal_instance *get_thermal_instance(struct
thermal_zone_device *tz,
+			struct thermal_cooling_device *cdev, int trip) {
+	struct thermal_instance *pos = NULL;
+	struct thermal_instance *target_instance = NULL;
+
+	mutex_lock(&tz->lock);
+	mutex_lock(&cdev->lock);
+
+	list_for_each_entry(pos, &tz->thermal_instances, tz_node) {
+		if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev)
{
+			target_instance = pos;
+			break;
+		}
+	}
+
+	mutex_unlock(&cdev->lock);
+	mutex_unlock(&tz->lock);
+
+	return target_instance;
+}
+EXPORT_SYMBOL(get_thermal_instance);
+
 /* sys I/F for thermal zone */

 #define to_thermal_zone(_dev) \

diff --git a/include/linux/thermal.h b/include/linux/thermal.h index

8611e3e..32af124 100644

--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h

@@ -185,6 +185,10 @@ struct thermal_cooling_device

*thermal_cooling_device_register(char *, void *,
 		const struct thermal_cooling_device_ops *);  void
thermal_cooling_device_unregister(struct thermal_cooling_device *);

+int get_tz_trend(struct thermal_zone_device *, int); struct