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thermal: helpers: Introduce thermal_trip_is_bound_to_cdev()

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Introduce a new helper function thermal_trip_is_bound_to_cdev() for
checking whether or not a given trip point has been bound to a given
cooling device.

The primary user of it will be the Tegra thermal driver.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/13545762.uLZWGnKmhe@rjwysocki.net
This commit is contained in:
Rafael J. Wysocki 2024-07-02 16:39:55 +02:00
parent d05374dee2
commit 463b86fed2
2 changed files with 41 additions and 15 deletions
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53
drivers/thermal/thermal_helpers.c
View File

@ -39,30 +39,53 @@ int get_tz_trend(struct thermal_zone_device *tz, const struct thermal_trip *trip
return trend;
}
struct thermal_instance *
get_thermal_instance(struct thermal_zone_device *tz,
struct thermal_cooling_device *cdev, int trip_index)
static struct thermal_instance *get_instance(struct thermal_zone_device *tz,
struct thermal_cooling_device *cdev,
const struct thermal_trip *trip)
{
struct thermal_instance *pos = NULL;
struct thermal_instance *target_instance = NULL;
const struct thermal_trip *trip;
struct thermal_instance *ti;
list_for_each_entry(ti, &tz->thermal_instances, tz_node) {
if (ti->trip == trip && ti->cdev == cdev)
return ti;
}
return NULL;
}
bool thermal_trip_is_bound_to_cdev(struct thermal_zone_device *tz,
const struct thermal_trip *trip,
struct thermal_cooling_device *cdev)
{
bool ret;
mutex_lock(&tz->lock);
mutex_lock(&cdev->lock);
trip = &tz->trips[trip_index].trip;
list_for_each_entry(pos, &tz->thermal_instances, tz_node) {
if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) {
target_instance = pos;
break;
}
}
ret = !!get_instance(tz, cdev, trip);
mutex_unlock(&cdev->lock);
mutex_unlock(&tz->lock);
return target_instance;
return ret;
}
EXPORT_SYMBOL_GPL(thermal_trip_is_bound_to_cdev);
struct thermal_instance *
get_thermal_instance(struct thermal_zone_device *tz,
struct thermal_cooling_device *cdev, int trip_index)
{
struct thermal_instance *ti;
mutex_lock(&tz->lock);
mutex_lock(&cdev->lock);
ti = get_instance(tz, cdev, &tz->trips[trip_index].trip);
mutex_unlock(&cdev->lock);
mutex_unlock(&tz->lock);
return ti;
}
EXPORT_SYMBOL(get_thermal_instance);

3
include/linux/thermal.h
View File

@ -270,6 +270,9 @@ struct thermal_zone_device *thermal_zone_get_zone_by_name(const char *name);
int thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp);
int thermal_zone_get_slope(struct thermal_zone_device *tz);
int thermal_zone_get_offset(struct thermal_zone_device *tz);
bool thermal_trip_is_bound_to_cdev(struct thermal_zone_device *tz,
const struct thermal_trip *trip,
struct thermal_cooling_device *cdev);
int thermal_zone_device_enable(struct thermal_zone_device *tz);
int thermal_zone_device_disable(struct thermal_zone_device *tz);