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Commit ca0bb24b authored by Manaf Meethalavalappu Pallikunhi's avatar Manaf Meethalavalappu Pallikunhi
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drivers: thermal: Notify only thermal zones whose trips are violated 



Whenever sensor driver event notification happens, of thermal
framework notifies all thermal zones associated to that sensor for
thermal re-evaluation. In this case, thermal zones whose trips are
not violated are also forced to re-evaluate.

Check if any trip of a thermal zone is violated, then notify that
zone for thermal re-evaluation and ignore other thermal zones
whose trips are not violated.

Change-Id: I3bed9738edc4c1ef4cd3b9748c2b50256941dc7d
Signed-off-by: default avatarManaf Meethalavalappu Pallikunhi <manafm@codeaurora.org>
parent 692654ff

drivers/thermal/of-thermal.c

+42 −0
Original line number Diff line number Diff line
@@ -569,6 +569,46 @@ static int of_thermal_aggregate_trip_types(struct thermal_zone_device *tz, 
	return 0;

}



static bool of_thermal_is_trips_triggered(struct thermal_zone_device *tz,

		int temp)

{

	int tt, th, trip, last_temp;

	struct __thermal_zone *data = tz->devdata;

	bool triggered = false;



	mutex_lock(&tz->lock);

	last_temp = tz->last_temperature;

	for (trip = 0; trip < data->ntrips; trip++) {



		if (!tz->tzp->tracks_low) {

			tt = data->trips[trip].temperature;

			if (temp >= tt && last_temp < tt) {

				triggered = true;

				break;

			}

			th = tt - data->trips[trip].hysteresis;

			if (temp <= th && last_temp > th) {

				triggered = true;

				break;

			}

		} else {

			tt = data->trips[trip].temperature;

			if (temp <= tt && last_temp > tt) {

				triggered = true;

				break;

			}

			th = tt + data->trips[trip].hysteresis;

			if (temp >= th && last_temp < th) {

				triggered = true;

				break;

			}

		}

	}

	mutex_unlock(&tz->lock);



	return triggered;

}



/*

 * of_thermal_aggregate_trip - aggregate trip temperatures across sibling

 *				thermal zones.
@@ -605,6 +645,8 @@ static void handle_thermal_trip(struct thermal_zone_device *tz, 
			thermal_zone_device_update(zone,

				THERMAL_EVENT_UNSPECIFIED);

		} else {

			if (!of_thermal_is_trips_triggered(zone, trip_temp))

				continue;

			thermal_zone_device_update_temp(zone,

				THERMAL_EVENT_UNSPECIFIED, trip_temp);

		}