[PATCH v1 06/14] thermal/core: Register cooling device non-OF drivers

Daniel Lezcano
2026-04-19T18:22:44Z

Provide a non-OF functions to register a cooling device in order to
have a clear separation between OF and non-OF code. Drivers not using
a devicetree can then migrate to this function.

Signed-off-by: Daniel Lezcano <daniel.lezcano@oss.qualcomm.com>
---
drivers/thermal/thermal_core.c | 44 ++++++++++++++++++++++++++++++++++
include/linux/thermal.h | 13 ++++++++++
2 files changed, 57 insertions(+)

diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 2f5d214d51a1..356a49e541fd 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -1164,6 +1164,50 @@ thermal_cooling_device_register(const char *type, void *devdata,
}
EXPORT_SYMBOL_GPL(thermal_cooling_device_register);

+static void thermal_cooling_device_release(struct device *dev, void *res)
+{
+ thermal_cooling_device_unregister(*(struct thermal_cooling_device **)res);
+}
+
+/**
+ * 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 with device tree node reference.
+ * 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 **ptr, *tcd;
+
+ ptr = devres_alloc(thermal_cooling_device_release, sizeof(*ptr),
+ GFP_KERNEL);
+ if (!ptr)
+ return ERR_PTR(-ENOMEM);
+
+ tcd = thermal_cooling_device_register(type, devdata, ops);
+ if (IS_ERR(tcd)) {
+ devres_free(ptr);
+ return tcd;
+ }
+
+ *ptr = tcd;
+ devres_add(dev, ptr);
+
+ return tcd;
+}
+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;
diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index 0ddc77aeeca2..d9332b037188 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -260,6 +260,11 @@ devm_thermal_of_cooling_device_register(struct device *dev,
struct device_node *np,
const char *type, void *devdata,
const struct thermal_cooling_device_ops *ops);
+
+struct thermal_cooling_device *
+devm_thermal_cooling_device_register(struct device *dev, const char *type,
+ void *devdata, const struct thermal_cooling_device_ops *ops);
+
void thermal_cooling_device_update(struct thermal_cooling_device *);
void thermal_cooling_device_unregister(struct thermal_cooling_device *);
struct thermal_zone_device *thermal_zone_get_zone_by_name(const char *name);
@@ -317,6 +322,14 @@ devm_thermal_of_cooling_device_register(struct device *dev,
{
return ERR_PTR(-ENODEV);
}
+
+struct thermal_cooling_device *
+devm_thermal_cooling_device_register(struct device *dev, const char *type,
+ void *devdata, const struct thermal_cooling_device_ops *ops)
+{
+ return ERR_PTR(-ENODEV);
+}
+
static inline void thermal_cooling_device_unregister(
struct thermal_cooling_device *cdev)
{ }
--
2.43.0