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Thermal: set upper and lower limits

Browse source 
set upper and lower limits when binding
a thermal cooling device to a thermal zone device.

Signed-off-by: Zhang Rui <[email protected]>
Reviewed-by: Rafael J. Wysocki <[email protected]>
Reviewed-by: Eduardo Valentin <[email protected]>
This commit is contained in:
Zhang Rui 2012-06-26 16:35:57 +08:00
commit 9d99842f99
5 changed files with 65 additions and 28 deletions
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23
drivers/thermal/thermal_sys.c
View file

@ -315,8 +315,9 @@ passive_store(struct device *dev, struct device_attribute *attr,
if (!strncmp("Processor", cdev->type,
sizeof("Processor")))
thermal_zone_bind_cooling_device(tz,
THERMAL_TRIPS_NONE,
cdev);
THERMAL_TRIPS_NONE, cdev,
THERMAL_NO_LIMIT,
THERMAL_NO_LIMIT);
}
mutex_unlock(&thermal_list_lock);
if (!tz->passive_delay)
@ -801,7 +802,8 @@ static void thermal_zone_device_check(struct work_struct *work)
*/
int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz,
int trip,
struct thermal_cooling_device *cdev)
struct thermal_cooling_device *cdev,
unsigned long upper, unsigned long lower)
{
struct thermal_cooling_device_instance *dev;
struct thermal_cooling_device_instance *pos;
@ -825,6 +827,15 @@ int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz,
if (tz != pos1 || cdev != pos2)
return -EINVAL;
cdev->ops->get_max_state(cdev, &max_state);
/* lower default 0, upper default max_state */
lower = lower == THERMAL_NO_LIMIT ? 0 : lower;
upper = upper == THERMAL_NO_LIMIT ? max_state : upper;
if (lower > upper || upper > max_state)
return -EINVAL;
dev =
kzalloc(sizeof(struct thermal_cooling_device_instance), GFP_KERNEL);
if (!dev)
@ -832,10 +843,8 @@ int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz,
dev->tz = tz;
dev->cdev = cdev;
dev->trip = trip;
cdev->ops->get_max_state(cdev, &max_state);
dev->upper = max_state;
dev->lower = 0;
dev->upper = upper;
dev->lower = lower;
result = get_idr(&tz->idr, &tz->lock, &dev->id);
if (result)