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,
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 *,
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