Commit 463b86fe authored by Rafael J. Wysocki's avatar Rafael J. Wysocki
Browse files

thermal: helpers: Introduce thermal_trip_is_bound_to_cdev() 



Introduce a new helper function thermal_trip_is_bound_to_cdev() for
checking whether or not a given trip point has been bound to a given
cooling device.

The primary user of it will be the Tegra thermal driver.

Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/13545762.uLZWGnKmhe@rjwysocki.net
parent d05374de

drivers/thermal/thermal_helpers.c

+35 −12
Original line number Diff line number Diff line
@@ -39,30 +39,53 @@ int get_tz_trend(struct thermal_zone_device *tz, const struct thermal_trip *trip 
	return trend;

}



static struct thermal_instance *get_instance(struct thermal_zone_device *tz,

					     struct thermal_cooling_device *cdev,

					     const struct thermal_trip *trip)

{

	struct thermal_instance *ti;



	list_for_each_entry(ti, &tz->thermal_instances, tz_node) {

		if (ti->trip == trip && ti->cdev == cdev)

			return ti;

	}



	return NULL;

}



bool thermal_trip_is_bound_to_cdev(struct thermal_zone_device *tz,

				   const struct thermal_trip *trip,

				   struct thermal_cooling_device *cdev)

{

	bool ret;



	mutex_lock(&tz->lock);

	mutex_lock(&cdev->lock);



	ret = !!get_instance(tz, cdev, trip);



	mutex_unlock(&cdev->lock);

	mutex_unlock(&tz->lock);



	return ret;

}

EXPORT_SYMBOL_GPL(thermal_trip_is_bound_to_cdev);



struct thermal_instance *

get_thermal_instance(struct thermal_zone_device *tz,

		     struct thermal_cooling_device *cdev, int trip_index)

{

	struct thermal_instance *pos = NULL;

	struct thermal_instance *target_instance = NULL;

	const struct thermal_trip *trip;

	struct thermal_instance *ti;



	mutex_lock(&tz->lock);

	mutex_lock(&cdev->lock);



	trip = &tz->trips[trip_index].trip;



	list_for_each_entry(pos, &tz->thermal_instances, tz_node) {

		if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) {

			target_instance = pos;

			break;

		}

	}

	ti = get_instance(tz, cdev, &tz->trips[trip_index].trip);



	mutex_unlock(&cdev->lock);

	mutex_unlock(&tz->lock);



	return target_instance;

	return ti;

}

EXPORT_SYMBOL(get_thermal_instance);

include/linux/thermal.h

+3 −0
Original line number Diff line number Diff line
@@ -270,6 +270,9 @@ struct thermal_zone_device *thermal_zone_get_zone_by_name(const char *name); 
int thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp);

int thermal_zone_get_slope(struct thermal_zone_device *tz);

int thermal_zone_get_offset(struct thermal_zone_device *tz);

bool thermal_trip_is_bound_to_cdev(struct thermal_zone_device *tz,

				   const struct thermal_trip *trip,

				   struct thermal_cooling_device *cdev);



int thermal_zone_device_enable(struct thermal_zone_device *tz);

int thermal_zone_device_disable(struct thermal_zone_device *tz);