Thermal: set upper and lower limits
set upper and lower limits when binding
a thermal cooling device to a thermal zone device.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Reviewed-by: Rafael J. Wysocki <rjw@sisk.pl>
Reviewed-by: Eduardo Valentin <eduardo.valentin@ti.com>
diff --git a/drivers/thermal/thermal_sys.c b/drivers/thermal/thermal_sys.c
index d78c6dc..b04fe2c 100644
--- a/drivers/thermal/thermal_sys.c
+++ b/drivers/thermal/thermal_sys.c
@@ -315,8 +315,9 @@
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 @@
*/
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 @@
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 @@
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)