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thermal: expose thermal_zone_get_temp API

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This patch exports the thermal_zone_get_temp API so that driver
writers can fetch temperature of thermal zones managed by other
drivers.

Acked-by: Durgadoss R <durgadoss.r@intel.com>
Signed-off-by: Eduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
This commit is contained in:
Eduardo Valentin 2013-04-05 12:32:29 +00:00 • committed by Zhang Rui
parent 63c4d919cf
commit 837b26bb2e
2 changed files with 18 additions and 3 deletions
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20
drivers/thermal/thermal_core.c
View file

@ -369,16 +369,28 @@ static void handle_thermal_trip(struct thermal_zone_device *tz, int trip)
monitor_thermal_zone(tz); monitor_thermal_zone(tz);
} }
static int thermal_zone_get_temp(struct thermal_zone_device *tz, /**
unsigned long *temp) * thermal_zone_get_temp() - returns its the temperature of thermal zone
* @tz: a valid pointer to a struct thermal_zone_device
* @temp: a valid pointer to where to store the resulting temperature.
*
* When a valid thermal zone reference is passed, it will fetch its
* temperature and fill @temp.
*
* Return: On success returns 0, an error code otherwise
*/
int thermal_zone_get_temp(struct thermal_zone_device *tz, unsigned long *temp)
{ {
int ret = 0; int ret = -EINVAL;
#ifdef CONFIG_THERMAL_EMULATION #ifdef CONFIG_THERMAL_EMULATION
int count; int count;
unsigned long crit_temp = -1UL; unsigned long crit_temp = -1UL;
enum thermal_trip_type type; enum thermal_trip_type type;
#endif #endif
if (IS_ERR_OR_NULL(tz))
goto exit;
mutex_lock(&tz->lock); mutex_lock(&tz->lock);
ret = tz->ops->get_temp(tz, temp); ret = tz->ops->get_temp(tz, temp);
@ -402,8 +414,10 @@ static int thermal_zone_get_temp(struct thermal_zone_device *tz,
skip_emul: skip_emul:
#endif #endif
mutex_unlock(&tz->lock); mutex_unlock(&tz->lock);
exit:
return ret; return ret;
} }
EXPORT_SYMBOL_GPL(thermal_zone_get_temp);
static void update_temperature(struct thermal_zone_device *tz) static void update_temperature(struct thermal_zone_device *tz)
{ {

1
include/linux/thermal.h
View file

@ -240,6 +240,7 @@ struct thermal_cooling_device *thermal_cooling_device_register(char *, void *,
const struct thermal_cooling_device_ops *); const struct thermal_cooling_device_ops *);
void thermal_cooling_device_unregister(struct thermal_cooling_device *); void thermal_cooling_device_unregister(struct thermal_cooling_device *);
struct thermal_zone_device *thermal_zone_get_zone_by_name(const char *name); struct thermal_zone_device *thermal_zone_get_zone_by_name(const char *name);
int thermal_zone_get_temp(struct thermal_zone_device *tz, unsigned long *temp);
int get_tz_trend(struct thermal_zone_device *, int); int get_tz_trend(struct thermal_zone_device *, int);
struct thermal_instance *get_thermal_instance(struct thermal_zone_device *, struct thermal_instance *get_thermal_instance(struct thermal_zone_device *,