[PATCH v1 02/14] thermal: helpers: Introduce thermal_trip_is_bound_to_cdev()

Rafael J. Wysocki
2024-06-17T18:13:16Z

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>
---
drivers/thermal/thermal_helpers.c | 47 ++++++++++++++++++++++++++++----------
include/linux/thermal.h | 3 ++
2 files changed, 38 insertions(+), 12 deletions(-)

Index: linux-pm/drivers/thermal/thermal_helpers.c
===================================================================
--- linux-pm.orig/drivers/thermal/thermal_helpers.c
+++ linux-pm/drivers/thermal/thermal_helpers.c
@@ -39,30 +39,53 @@ int get_tz_trend(struct thermal_zone_dev
return trend;
}

+static struct thermal_instance *get_instance(struct thermal_zone_device *tz,
+ struct thermal_cooling_device *cdev,
+ 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);
+
+ ret = !!get_instance(tz, cdev, trip);
+
+ mutex_unlock(&cdev->lock);
+ mutex_unlock(&tz->lock);
+
+ 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 *pos = NULL;
- struct thermal_instance *target_instance = NULL;
- const struct thermal_trip *trip;
+ struct thermal_instance *ti;

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;
- }
- }
+ ti = get_instance(tz, cdev, &tz->trips[trip_index].trip);

mutex_unlock(&cdev->lock);
mutex_unlock(&tz->lock);

- return target_instance;
+ return ti;
}
EXPORT_SYMBOL(get_thermal_instance);

Index: linux-pm/include/linux/thermal.h
===================================================================
--- linux-pm.orig/include/linux/thermal.h
+++ linux-pm/include/linux/thermal.h
@@ -269,6 +269,9 @@ struct thermal_zone_device *thermal_zone
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);