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Commit 9b4298a0 authored by Durgadoss R's avatar Durgadoss R Committed by Zhang Rui
Browse files

Thermal: Add get trend, get instance API's to thermal_sys 



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: default avatarDurgadoss R <durgadoss.r@intel.com>
Signed-off-by: default avatarZhang Rui <rui.zhang@intel.com>
parent 71350db4

drivers/thermal/thermal_sys.c

+40 −0
Original line number Diff line number Diff line
@@ -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) \

include/linux/thermal.h

+4 −0
Original line number Diff line number Diff line
@@ -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 thermal_instance *get_thermal_instance(struct thermal_zone_device *,

		struct thermal_cooling_device *, int);



#ifdef CONFIG_NET

extern int thermal_generate_netlink_event(u32 orig, enum events event);

#else