On 14-04-2013 21:43, Zhang Rui wrote:
On Fri, 2013-04-05 at 08:32 -0400, Eduardo Valentin wrote:
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 <durgados...@intel.com>
Signed-off-by: Eduardo Valentin <eduardo.valen...@ti.com>
refreshed the patch to modify drivers/thermal/thermal_core.c instead of
drivers/thermal/thermal_sys.c and applied to thermal -next.
Thanks!
thanks,
rui
---
drivers/thermal/thermal_sys.c | 20 +++++++++++++++++---
include/linux/thermal.h | 1 +
2 files changed, 18 insertions(+), 3 deletions(-)
diff --git a/drivers/thermal/thermal_sys.c b/drivers/thermal/thermal_sys.c
index e9b636b..83bfa0d 100644
--- a/drivers/thermal/thermal_sys.c
+++ b/drivers/thermal/thermal_sys.c
@@ -371,16 +371,28 @@ 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);
@@ -404,8 +416,10 @@ 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)
{
diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index 0cf9eb5..8eea86c 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -238,6 +238,7 @@ 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 *);
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 thermal_zone_trend_get(struct thermal_zone_device *, int);
struct thermal_instance *thermal_instance_get(struct thermal_zone_device *,
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
