diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/thermal/gov_bang_bang.c | 43 |
1 files changed, 21 insertions, 22 deletions
diff --git a/drivers/thermal/gov_bang_bang.c b/drivers/thermal/gov_bang_bang.c index c24c168577f2..20d4e0940eca 100644 --- a/drivers/thermal/gov_bang_bang.c +++ b/drivers/thermal/gov_bang_bang.c @@ -7,6 +7,27 @@ * Based on step_wise.c with following Copyrights: * Copyright (C) 2012 Intel Corp * Copyright (C) 2012 Durgadoss R <durgadoss.r@intel.com> + * + * Regulation Logic: a two point regulation, deliver cooling state depending + * on the previous state shown in this diagram: + * + * Fan: OFF ON + * + * | + * | + * trip_temp: +---->+ + * | | ^ + * | | | + * | | Temperature + * (trip_temp - hyst): +<----+ + * | + * | + * | + * + * * If the fan is not running and temperature exceeds trip_temp, the fan + * gets turned on. + * * In case the fan is running, temperature must fall below + * (trip_temp - hyst) so that the fan gets turned off again. */ #include <linux/thermal.h> @@ -38,28 +59,6 @@ static void bang_bang_set_instance_target(struct thermal_instance *instance, * @tz: thermal_zone_device * @trip: the trip point * @crossed_up: whether or not the trip has been crossed on the way up - * - * Regulation Logic: a two point regulation, deliver cooling state depending - * on the previous state shown in this diagram: - * - * Fan: OFF ON - * - * | - * | - * trip_temp: +---->+ - * | | ^ - * | | | - * | | Temperature - * (trip_temp - hyst): +<----+ - * | - * | - * | - * - * * If the fan is not running and temperature exceeds trip_temp, the fan - * gets turned on. - * * In case the fan is running, temperature must fall below - * (trip_temp - hyst) so that the fan gets turned off again. - * */ static void bang_bang_trip_crossed(struct thermal_zone_device *tz, const struct thermal_trip *trip, |