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| author | Zhang Rui <rui.zhang@intel.com> | 2012-06-26 16:35:57 +0800 |
|---|---|---|
| committer | Zhang Rui <rui.zhang@intel.com> | 2012-09-24 14:44:36 +0800 |
| commit | 9d99842f99d847191ebd0c28469d2c70fcc5bf9e (patch) | |
| tree | 211624d5fbc557c1226b6270a96807acc3b383df /drivers/thermal/thermal_sys.c | |
| parent | 74051ba50583a5880d4536c1d9333e2493ddfd76 (diff) | |
| download | lwn-9d99842f99d847191ebd0c28469d2c70fcc5bf9e.tar.gz lwn-9d99842f99d847191ebd0c28469d2c70fcc5bf9e.zip | |
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>
Diffstat (limited to 'drivers/thermal/thermal_sys.c')
| -rw-r--r-- | drivers/thermal/thermal_sys.c | 23 |
1 files changed, 16 insertions, 7 deletions
diff --git a/drivers/thermal/thermal_sys.c b/drivers/thermal/thermal_sys.c index d78c6dc6b00a..b04fe2c4b0d5 100644 --- a/drivers/thermal/thermal_sys.c +++ b/drivers/thermal/thermal_sys.c @@ -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) |