diff options
| author | Durgadoss R <durgadoss.r@intel.com> | 2012-09-18 11:04:54 +0530 |
|---|---|---|
| committer | Zhang Rui <rui.zhang@intel.com> | 2012-11-05 13:56:32 +0800 |
| commit | 9b4298a088907811a4fe5a5d7cd2454da60708c5 (patch) | |
| tree | 77d598b92fae403b5cc1c558a9f52d69da4a072b | |
| parent | 71350db43b4c5c4da59b729c805f00ff6675b99d (diff) | |
| download | linux-9b4298a088907811a4fe5a5d7cd2454da60708c5.tar.bz2 | |
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: Durgadoss R <durgadoss.r@intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
| -rw-r--r-- | drivers/thermal/thermal_sys.c | 40 | ||||
| -rw-r--r-- | include/linux/thermal.h | 4 |
2 files changed, 44 insertions, 0 deletions
diff --git a/drivers/thermal/thermal_sys.c b/drivers/thermal/thermal_sys.c index bbc834625f7f..1f98c560a88e 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 8611e3eba60c..32af124d23cd 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 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 |