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thermal/core: Add devm_thermal_cooling_device_register()

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Introduce a device-managed variant of the non-OF cooling device
registration API.

This complements devm_thermal_of_cooling_device_register() and allows
non-device-tree users to register cooling devices with automatic
cleanup tied to the device lifecycle.

The helper relies on devm_add_action_or_reset() to release the cooling
device via thermal_cooling_device_release() on driver detach or probe
failure.

This keeps the API consistent across OF and non-OF users and avoids
manual cleanup in error paths.

Signed-off-by: Daniel Lezcano <daniel.lezcano@oss.qualcomm.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@kernel.org>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Acked-by: Rafael J. Wysocki (Intel) <rafael@kernel.org>
Link: https://patch.msgid.link/20260526140802.1059293-14-daniel.lezcano@oss.qualcomm.com
This commit is contained in:
Daniel Lezcano 2026-05-26 16:08:03 +02:00 committed by Daniel Lezcano
parent 298a2d461f
commit 876bb45f36
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GPG Key ID: A832238A2A4FE84F
2 changed files with 40 additions and 2 deletions
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35
drivers/thermal/thermal_core.c
View File

@ -1173,6 +1173,41 @@ devm_thermal_of_cooling_device_register(struct device *dev,
}
EXPORT_SYMBOL_GPL(devm_thermal_of_cooling_device_register);
/**
* devm_thermal_cooling_device_register() - register a thermal cooling device
*
* @dev: a valid struct device pointer of a sensor device.
* @type: the thermal cooling device type.
* @devdata: device private data.
* @ops: standard thermal cooling devices callbacks.
*
* This function will register a cooling device. This interface
* function adds a new thermal cooling device (fan/processor/...) to
* /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind
* itself to all the thermal zone devices registered at the same time.
*
* Return: a pointer to the created struct thermal_cooling_device or an
* ERR_PTR. Caller must check return value with IS_ERR*() helpers.
*/
struct thermal_cooling_device *
devm_thermal_cooling_device_register(struct device *dev, const char *type, void *devdata,
const struct thermal_cooling_device_ops *ops)
{
struct thermal_cooling_device *cdev;
int ret;
cdev = thermal_cooling_device_register(type, devdata, ops);
if (IS_ERR(cdev))
return cdev;
ret = devm_add_action_or_reset(dev, thermal_cooling_device_release, cdev);
if (ret)
return ERR_PTR(ret);
return cdev;
}
EXPORT_SYMBOL_GPL(devm_thermal_cooling_device_register);
static bool thermal_cooling_device_present(struct thermal_cooling_device *cdev)
{
struct thermal_cooling_device *pos = NULL;

7
include/linux/thermal.h
View File

@ -253,8 +253,11 @@ void thermal_zone_device_update(struct thermal_zone_device *,
struct thermal_cooling_device *thermal_cooling_device_register(const char *,
void *, const struct thermal_cooling_device_ops *);
struct thermal_cooling_device *
thermal_of_cooling_device_register(struct device_node *np, const char *, void *,
const struct thermal_cooling_device_ops *);
devm_thermal_cooling_device_register(struct device *dev, const char *type, void *devdata,
const struct thermal_cooling_device_ops *ops);
struct thermal_cooling_device *
thermal_of_cooling_device_register(struct device_node *np, const char *type, void *devdata,
const struct thermal_cooling_device_ops *ops);
struct thermal_cooling_device *
devm_thermal_of_cooling_device_register(struct device *dev,
struct device_node *np,