diff options
Diffstat (limited to 'drivers/thermal/gov_bang_bang.c')
| -rw-r--r-- | drivers/thermal/gov_bang_bang.c | 57 |
1 files changed, 28 insertions, 29 deletions
diff --git a/drivers/thermal/gov_bang_bang.c b/drivers/thermal/gov_bang_bang.c index 97f3d819852b..51951967d67f 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> @@ -34,36 +55,14 @@ static void bang_bang_set_instance_target(struct thermal_instance *instance, } /** - * bang_bang_control - controls devices associated with the given zone + * bang_bang_trip_crossed - controls devices associated with the given zone * @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. - * + * @upward: whether or not the trip has been crossed on the way up */ -static void bang_bang_control(struct thermal_zone_device *tz, - const struct thermal_trip *trip, - bool crossed_up) +static void bang_bang_trip_crossed(struct thermal_zone_device *tz, + const struct thermal_trip *trip, + bool upward) { const struct thermal_trip_desc *td = trip_to_trip_desc(trip); struct thermal_instance *instance; @@ -75,7 +74,7 @@ static void bang_bang_control(struct thermal_zone_device *tz, tz->temperature, trip->hysteresis); list_for_each_entry(instance, &td->thermal_instances, trip_node) - bang_bang_set_instance_target(instance, crossed_up); + bang_bang_set_instance_target(instance, upward); } static void bang_bang_manage(struct thermal_zone_device *tz) @@ -123,7 +122,7 @@ static void bang_bang_update_tz(struct thermal_zone_device *tz, static struct thermal_governor thermal_gov_bang_bang = { .name = "bang_bang", - .trip_crossed = bang_bang_control, + .trip_crossed = bang_bang_trip_crossed, .manage = bang_bang_manage, .update_tz = bang_bang_update_tz, }; |