[PATCH v1 10/13] thermal: core: Allow trip pointers to be used for cooling device binding

Rafael J. Wysocki
2023-09-21T18:10:44Z

From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Add new helper functions, thermal_bind_cdev_to_trip() and
thermal_unbind_cdev_from_trip(), to allow a trip pointer to be used for
binding a cooling device to a trip point and unbinding it, respectively,
and redefine the existing helpers, thermal_zone_bind_cooling_device()
and thermal_zone_unbind_cooling_device(), as wrappers around the new
ones, respectively.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
drivers/thermal/thermal_core.c | 54 +++++++++++++++++++++++++----------------
include/linux/thermal.h | 8 ++++++
2 files changed, 42 insertions(+), 20 deletions(-)

Index: linux-pm/drivers/thermal/thermal_core.c
===================================================================
--- linux-pm.orig/drivers/thermal/thermal_core.c
+++ linux-pm/drivers/thermal/thermal_core.c
@@ -600,10 +600,9 @@ struct thermal_zone_device *thermal_zone
*/

/**
- * thermal_zone_bind_cooling_device() - bind a cooling device to a thermal zone
+ * thermal_bind_cdev_to_trip - bind a cooling device to a thermal zone
* @tz: pointer to struct thermal_zone_device
- * @trip_index: indicates which trip point the cooling devices is
- * associated with in this thermal zone.
+ * @trip: trip point the cooling devices is associated with in this zone.
* @cdev: pointer to struct thermal_cooling_device
* @upper: the Maximum cooling state for this trip point.
* THERMAL_NO_LIMIT means no upper limit,
@@ -621,8 +620,8 @@ struct thermal_zone_device *thermal_zone
*
* Return: 0 on success, the proper error value otherwise.
*/
-int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz,
- int trip_index,
+int thermal_bind_cdev_to_trip(struct thermal_zone_device *tz,
+ const struct thermal_trip *trip,
struct thermal_cooling_device *cdev,
unsigned long upper, unsigned long lower,
unsigned int weight)
@@ -631,15 +630,9 @@ int thermal_zone_bind_cooling_device(str
struct thermal_instance *pos;
struct thermal_zone_device *pos1;
struct thermal_cooling_device *pos2;
- const struct thermal_trip *trip;
bool upper_no_limit;
int result;

- if (trip_index >= tz->num_trips || trip_index < 0)
- return -EINVAL;
-
- trip = &tz->trips[trip_index];
-
list_for_each_entry(pos1, &thermal_tz_list, node) {
if (pos1 == tz)
break;
@@ -736,14 +729,26 @@ free_mem:
kfree(dev);
return result;
}
+EXPORT_SYMBOL_GPL(thermal_bind_cdev_to_trip);
+
+int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz,
+ int trip_index,
+ struct thermal_cooling_device *cdev,
+ unsigned long upper, unsigned long lower,
+ unsigned int weight)
+{
+ if (trip_index < 0 || trip_index >= tz->num_trips)
+ return -EINVAL;
+
+ return thermal_bind_cdev_to_trip(tz, &tz->trips[trip_index], cdev,
+ upper, lower, weight);
+}
EXPORT_SYMBOL_GPL(thermal_zone_bind_cooling_device);

/**
- * thermal_zone_unbind_cooling_device() - unbind a cooling device from a
- * thermal zone.
+ * thermal_unbind_cdev_from_trip - unbind a cooling device from a thermal zone.
* @tz: pointer to a struct thermal_zone_device.
- * @trip_index: indicates which trip point the cooling devices is
- * associated with in this thermal zone.
+ * @trip: trip point the cooling devices is associated with in this zone.
* @cdev: pointer to a struct thermal_cooling_device.
*
* This interface function unbind a thermal cooling device from the certain
@@ -752,16 +757,14 @@ EXPORT_SYMBOL_GPL(thermal_zone_bind_cool
*
* Return: 0 on success, the proper error value otherwise.
*/
-int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz,
- int trip_index,
- struct thermal_cooling_device *cdev)
+int thermal_unbind_cdev_from_trip(struct thermal_zone_device *tz,
+ const struct thermal_trip *trip,
+ struct thermal_cooling_device *cdev)
{
struct thermal_instance *pos, *next;
- const struct thermal_trip *trip;

mutex_lock(&tz->lock);
mutex_lock(&cdev->lock);
- trip = &tz->trips[trip_index];
list_for_each_entry_safe(pos, next, &tz->thermal_instances, tz_node) {
if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) {
list_del(&pos->tz_node);
@@ -784,6 +787,17 @@ unbind:
kfree(pos);
return 0;
}
+EXPORT_SYMBOL_GPL(thermal_unbind_cdev_from_trip);
+
+int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz,
+ int trip_index,
+ struct thermal_cooling_device *cdev)
+{
+ if (trip_index < 0 || trip_index >= tz->num_trips)
+ return -EINVAL;
+
+ return thermal_unbind_cdev_from_trip(tz, &tz->trips[trip_index], cdev);
+}
EXPORT_SYMBOL_GPL(thermal_zone_unbind_cooling_device);

static void thermal_release(struct device *dev)
Index: linux-pm/include/linux/thermal.h
===================================================================
--- linux-pm.orig/include/linux/thermal.h
+++ linux-pm/include/linux/thermal.h
@@ -320,10 +320,18 @@ const char *thermal_zone_device_type(str
int thermal_zone_device_id(struct thermal_zone_device *tzd);
struct device *thermal_zone_device(struct thermal_zone_device *tzd);

+int thermal_bind_cdev_to_trip(struct thermal_zone_device *tz,
+ const struct thermal_trip *trip,
+ struct thermal_cooling_device *cdev,
+ unsigned long upper, unsigned long lower,
+ unsigned int weight);
int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int,
struct thermal_cooling_device *,
unsigned long, unsigned long,
unsigned int);
+int thermal_unbind_cdev_from_trip(struct thermal_zone_device *tz,
+ const struct thermal_trip *trip,
+ struct thermal_cooling_device *cdev);
int thermal_zone_unbind_cooling_device(struct thermal_zone_device *, int,
struct thermal_cooling_device *);
void thermal_zone_device_update(struct thermal_zone_device *,