On 六, 2012-09-01 at 17:21 +0530, Durgadoss R wrote:
> This patch registers a governor which will let the
> user land manage the platform thermals. Whenever a
> trip happens, this governor just notifies the user
> space using kobj_uevent().
>
Hmm, we can make this governor configurable, not the step_wise (which is
used as the default governor), right?
thanks,
rui
> Signed-off-by: Durgadoss R <durgadoss.r@xxxxxxxxx>
> ---
> drivers/thermal/thermal_sys.c | 18 ++++++++++++++++++
> include/linux/thermal.h | 2 ++
> 2 files changed, 20 insertions(+)
>
> diff --git a/drivers/thermal/thermal_sys.c b/drivers/thermal/thermal_sys.c
> index 936b025..93672aa 100644
> --- a/drivers/thermal/thermal_sys.c
> +++ b/drivers/thermal/thermal_sys.c
> @@ -130,6 +130,15 @@ exit:
> }
> EXPORT_SYMBOL_GPL(thermal_unregister_governor);
>
> +static int notify_user_space(struct thermal_zone_device *tz, int trip)
> +{
> + mutex_lock(&tz->lock);
> + kobject_uevent(&tz->device.kobj, KOBJ_CHANGE);
> + mutex_unlock(&tz->lock);
> +
> + return 0;
> +}
> +
> static int get_idr(struct idr *idr, struct mutex *lock, int *id)
> {
> int err;
> @@ -1860,6 +1869,12 @@ static inline int genetlink_init(void) { return 0; }
> static inline void genetlink_exit(void) {}
> #endif /* !CONFIG_NET */
>
> +struct thermal_governor thermal_gov_user_space = {
> + .name = USER_SPACE_THERMAL_GOVERNOR,
> + .throttle = notify_user_space,
> + .owner = THIS_MODULE,
> +};
> +
> static int __init thermal_init(void)
> {
> int result = 0;
> @@ -1871,6 +1886,8 @@ static int __init thermal_init(void)
> mutex_destroy(&thermal_idr_lock);
> mutex_destroy(&thermal_list_lock);
> }
> + /* Register a governor to notify user space */
> + thermal_register_governor(&thermal_gov_user_space);
> result = genetlink_init();
> return result;
> }
> @@ -1882,6 +1899,7 @@ static void __exit thermal_exit(void)
> idr_destroy(&thermal_cdev_idr);
> mutex_destroy(&thermal_idr_lock);
> mutex_destroy(&thermal_list_lock);
> + thermal_unregister_governor(&thermal_gov_user_space);
> genetlink_exit();
> }
>
> diff --git a/include/linux/thermal.h b/include/linux/thermal.h
> index 2bd9158..aa903dd 100644
> --- a/include/linux/thermal.h
> +++ b/include/linux/thermal.h
> @@ -48,6 +48,8 @@
>
> /* Default Thermal Governor: Does Linear Throttling */
> #define DEFAULT_THERMAL_GOVERNOR "step_wise"
> +/* User space Thermal governor */
> +#define USER_SPACE_THERMAL_GOVERNOR "user_space"
>
> struct thermal_zone_device;
> struct thermal_cooling_device;
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