diff options
| author | Eduardo Valentin <eduardo.valentin@ti.com> | 2013-04-05 14:32:29 +0200 |
|---|---|---|
| committer | Zhang Rui <rui.zhang@intel.com> | 2013-04-15 03:39:02 +0200 |
| commit | 837b26bb2e4a83d224e725f07a1d9ca824bf905c (patch) | |
| tree | 7dc6a3c904b5a434f0c1fb48daa99e9dbbb704a0 /drivers/thermal | |
| parent | thermal: introduce thermal_zone_get_zone_by_name helper function (diff) | |
| download | linux-837b26bb2e4a83d224e725f07a1d9ca824bf905c.tar.xz linux-837b26bb2e4a83d224e725f07a1d9ca824bf905c.zip | |
thermal: expose thermal_zone_get_temp API
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>
Diffstat (limited to 'drivers/thermal')
| -rw-r--r-- | drivers/thermal/thermal_core.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c index 5045473485cf..c0779adb2459 100644 --- a/drivers/thermal/thermal_core.c +++ b/drivers/thermal/thermal_core.c @@ -369,16 +369,28 @@ static void handle_thermal_trip(struct thermal_zone_device *tz, int trip) 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 int count; unsigned long crit_temp = -1UL; enum thermal_trip_type type; #endif + if (IS_ERR_OR_NULL(tz)) + goto exit; + mutex_lock(&tz->lock); ret = tz->ops->get_temp(tz, temp); @@ -402,8 +414,10 @@ static int thermal_zone_get_temp(struct thermal_zone_device *tz, skip_emul: #endif mutex_unlock(&tz->lock); +exit: return ret; } +EXPORT_SYMBOL_GPL(thermal_zone_get_temp); static void update_temperature(struct thermal_zone_device *tz) { |