Hello,
On Thu, Aug 09, 2012 at 06:15:55PM +0530, Durgadoss R wrote:
> 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_cdev_by_name: obtain cdev pointer given its name
> * get_thermal_instance: obtain the instance corresponding
> to the given tz, cdev and the trip point.
>
> Signed-off-by: Durgadoss R <durgadoss.r@xxxxxxxxx>
> ---
> drivers/thermal/thermal_sys.c | 59 +++++++++++++++++++++++++++++++++++++++++
> include/linux/thermal.h | 5 ++++
> 2 files changed, 64 insertions(+)
>
> diff --git a/drivers/thermal/thermal_sys.c b/drivers/thermal/thermal_sys.c
> index a0e20f9..998c16e 100644
> --- a/drivers/thermal/thermal_sys.c
> +++ b/drivers/thermal/thermal_sys.c
> @@ -80,6 +80,65 @@ 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);
You may want to reuse the above function inside thermal_zone_trip_update().
> +
> +struct thermal_cooling_device *get_cdev_by_name(const char *name)
> +{
> + struct thermal_cooling_device *pos;
> + struct thermal_cooling_device *target_cdev = NULL;
> +
> + mutex_lock(&thermal_list_lock);
> +
> + list_for_each_entry(pos, &thermal_cdev_list, node) {
> + if (!strcmp(pos->type, name)) {
strncmp?
> + target_cdev = pos;
> + break;
> + }
> + }
> + mutex_unlock(&thermal_list_lock);
> +
> + return target_cdev;
> +}
> +EXPORT_SYMBOL(get_cdev_by_name);
> +
> +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 f25df23..757a007 100644
> --- a/include/linux/thermal.h
> +++ b/include/linux/thermal.h
> @@ -208,6 +208,11 @@ 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_cooling_device *get_cdev_by_name(const char *);
> +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
> --
> 1.7.9.5
>
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