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| author | Zhang Rui <rui.zhang@intel.com> | 2012-06-26 16:26:40 +0800 |
|---|---|---|
| committer | Zhang Rui <rui.zhang@intel.com> | 2012-09-24 14:44:36 +0800 |
| commit | e3f25e6e5836c4790fbe395ff42e241f372d859d (patch) | |
| tree | 9667ec2691e586a9b4a0ca4a8d4e14d51fa168ec /drivers/thermal | |
| parent | 0d7614f09c1ebdbaa1599a5aba7593f147bf96ee (diff) | |
| download | linux-e3f25e6e5836c4790fbe395ff42e241f372d859d.tar.gz linux-e3f25e6e5836c4790fbe395ff42e241f372d859d.tar.bz2 linux-e3f25e6e5836c4790fbe395ff42e241f372d859d.zip | |
Thermal: Introduce multiple cooling states support
This is because general active cooling devices, like fans,
may have multiple speeds, which can be mapped to different cooling states.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Reviewed-by: Rafael J. Wysocki <rjw@sisk.pl>
Reviewed-by: Valentin, Eduardo <eduardo.valentin@ti.com>
Diffstat (limited to 'drivers/thermal')
| -rw-r--r-- | drivers/thermal/thermal_sys.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/thermal/thermal_sys.c b/drivers/thermal/thermal_sys.c index 2ab31e4f02cc..dc4044b682a1 100644 --- a/drivers/thermal/thermal_sys.c +++ b/drivers/thermal/thermal_sys.c @@ -1059,6 +1059,7 @@ void thermal_zone_device_update(struct thermal_zone_device *tz) enum thermal_trip_type trip_type; struct thermal_cooling_device_instance *instance; struct thermal_cooling_device *cdev; + unsigned long cur_state, max_state; mutex_lock(&tz->lock); @@ -1098,10 +1099,17 @@ void thermal_zone_device_update(struct thermal_zone_device *tz) cdev = instance->cdev; + cdev->ops->get_cur_state(cdev, &cur_state); + cdev->ops->get_max_state(cdev, &max_state); + if (temp >= trip_temp) - cdev->ops->set_cur_state(cdev, 1); + cur_state = cur_state < max_state ? + (cur_state + 1) : max_state; else - cdev->ops->set_cur_state(cdev, 0); + cur_state = cur_state > 0 ? + (cur_state - 1) : 0; + + cdev->ops->set_cur_state(cdev, cur_state); } break; case THERMAL_TRIP_PASSIVE: |