diff options
Diffstat (limited to 'drivers/thermal')
| -rw-r--r-- | drivers/thermal/thermal_sys.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/drivers/thermal/thermal_sys.c b/drivers/thermal/thermal_sys.c index bbc834625f7..1f98c560a88 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) \ |