diff options
| author | Zhang Rui <rui.zhang@intel.com> | 2012-06-27 10:05:39 +0800 |
|---|---|---|
| committer | Simone Willett <swillett@nvidia.com> | 2012-11-05 10:10:06 -0800 |
| commit | fe4ebbdab1278f738052d88ab0d3dfd921d0a07d (patch) | |
| tree | 4d981819e103eb60658edf564613aabe33c907e8 /drivers/acpi/thermal.c | |
| parent | 125810fe4d547ec7904cb37b6e943a4ecce05ed6 (diff) | |
Thermal: Introduce thermal_zone_trip_update()
This function is used to update the cooling state of
all the cooling devices that are bound to an active trip point.
This will be used for passive cooling as well, in the future patches.
as both active and passive cooling can share the same algorithm,
which is
1. if the temperature is higher than a trip point,
a. if the trend is THERMAL_TREND_RAISING, use higher cooling
state for this trip point
b. if the trend is THERMAL_TREND_DROPPING, use lower cooling
state for this trip point
2. if the temperature is lower than a trip point, use lower
cooling state for this trip point.
bug 1059470
Change-Id: I01a713e5fed43369f3d43d0ef4999e5d478bdfea
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>
Reviewed-on: http://git-master/r/159969
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Joshua Primero <jprimero@nvidia.com>
Tested-by: Joshua Primero <jprimero@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Diwakar Tundlam <dtundlam@nvidia.com>
Diffstat (limited to 'drivers/acpi/thermal.c')
| -rw-r--r-- | drivers/acpi/thermal.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c index 0c755d2803fa..a0b1e88c9eb5 100644 --- a/drivers/acpi/thermal.c +++ b/drivers/acpi/thermal.c @@ -714,9 +714,11 @@ static int thermal_get_trend(struct thermal_zone_device *thermal, if (thermal_get_trip_type(thermal, trip, &type)) return -EINVAL; - /* Only PASSIVE trip points need TREND */ - if (type != THERMAL_TRIP_PASSIVE) - return -EINVAL; + if (type == THERMAL_TRIP_ACTIVE) { + /* aggressive active cooling */ + *trend = THERMAL_TREND_RAISING; + return 0; + } /* * tz->temperature has already been updated by generic thermal layer, |