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().
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;
--
1.7.9.5
--
To unsubscribe from this list: send the line "unsubscribe linux-acpi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
