[PATCH v2 02/12] thermal/of: Move OF code where it belongs to
From: Daniel Lezcano
Date: Wed Apr 22 2026 - 13:43:59 EST
The functions:
- thermal_of_cooling_device_register()
- devm_thermal_of_cooling_device_register()
are related to thermal-of but they are implemented in
thermal-core. Move these functions to the right file.
As the thermal-of file depends on CONFIG_THERMAL_OF=y, by moving these
two functions in it, when non-OF drivers are using this API that
results in a link issue. In order to prevent unnecessary
circumvolutions with the changes, the stubs have been added in the
header file resulting in having the non-OF drivers compiled without
the CONFIG_THERMAL_OF=y using these stubs and failing to register
their cooling devices.
This is temporary as the next changes introduces the functions for
non-OF drivers and returning to the initial state.
Signed-off-by: Daniel Lezcano <daniel.lezcano@xxxxxxxxxxxxxxxx>
---
drivers/thermal/thermal_core.c | 75 +---------------------------------
drivers/thermal/thermal_core.h | 5 +++
drivers/thermal/thermal_of.c | 72 ++++++++++++++++++++++++++++++++
include/linux/thermal.h | 47 ++++++++++++---------
4 files changed, 105 insertions(+), 94 deletions(-)
diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 2f4e2dc46b8f..8a70768b46dd 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -1056,7 +1056,7 @@ static void thermal_cooling_device_init_complete(struct thermal_cooling_device *
* Return: a pointer to the created struct thermal_cooling_device or an
* ERR_PTR. Caller must check return value with IS_ERR*() helpers.
*/
-static struct thermal_cooling_device *
+struct thermal_cooling_device *
__thermal_cooling_device_register(struct device_node *np,
const char *type, void *devdata,
const struct thermal_cooling_device_ops *ops)
@@ -1163,79 +1163,6 @@ thermal_cooling_device_register(const char *type, void *devdata,
}
EXPORT_SYMBOL_GPL(thermal_cooling_device_register);
-/**
- * thermal_of_cooling_device_register() - register an OF thermal cooling device
- * @np: a pointer to a device tree node.
- * @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 *
-thermal_of_cooling_device_register(struct device_node *np,
- const char *type, void *devdata,
- const struct thermal_cooling_device_ops *ops)
-{
- return __thermal_cooling_device_register(np, type, devdata, ops);
-}
-EXPORT_SYMBOL_GPL(thermal_of_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_of_cooling_device_register() - register an OF thermal cooling
- * device
- * @dev: a valid struct device pointer of a sensor device.
- * @np: a pointer to a device tree node.
- * @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_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 **ptr, *tcd;
-
- ptr = devres_alloc(thermal_cooling_device_release, sizeof(*ptr),
- GFP_KERNEL);
- if (!ptr)
- return ERR_PTR(-ENOMEM);
-
- tcd = __thermal_cooling_device_register(np, 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_of_cooling_device_register);
-
static bool thermal_cooling_device_present(struct thermal_cooling_device *cdev)
{
struct thermal_cooling_device *pos = NULL;
diff --git a/drivers/thermal/thermal_core.h b/drivers/thermal/thermal_core.h
index d3acff602f9c..bdd59947b24f 100644
--- a/drivers/thermal/thermal_core.h
+++ b/drivers/thermal/thermal_core.h
@@ -269,6 +269,11 @@ void thermal_zone_device_critical_shutdown(struct thermal_zone_device *tz);
void thermal_governor_update_tz(struct thermal_zone_device *tz,
enum thermal_notify_event reason);
+struct thermal_cooling_device *
+__thermal_cooling_device_register(struct device_node *np,
+ const char *type, void *devdata,
+ const struct thermal_cooling_device_ops *ops);
+
/* Helpers */
#define for_each_trip_desc(__tz, __td) \
for (__td = __tz->trips; __td - __tz->trips < __tz->num_trips; __td++)
diff --git a/drivers/thermal/thermal_of.c b/drivers/thermal/thermal_of.c
index 99085c806a1f..398157e740fc 100644
--- a/drivers/thermal/thermal_of.c
+++ b/drivers/thermal/thermal_of.c
@@ -510,3 +510,75 @@ void devm_thermal_of_zone_unregister(struct device *dev, struct thermal_zone_dev
devm_thermal_of_zone_match, tz));
}
EXPORT_SYMBOL_GPL(devm_thermal_of_zone_unregister);
+
+/**
+ * thermal_of_cooling_device_register() - register an OF thermal cooling device
+ * @np: a pointer to a device tree node.
+ * @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 *
+thermal_of_cooling_device_register(struct device_node *np,
+ const char *type, void *devdata,
+ const struct thermal_cooling_device_ops *ops)
+{
+ return __thermal_cooling_device_register(np, type, devdata, ops);
+}
+EXPORT_SYMBOL_GPL(thermal_of_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_of_cooling_device_register() - register an OF thermal cooling
+ * device
+ * @dev: a valid struct device pointer of a sensor device.
+ * @np: a pointer to a device tree node.
+ * @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_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 **ptr, *tcd;
+
+ ptr = devres_alloc(thermal_cooling_device_release, sizeof(*ptr),
+ GFP_KERNEL);
+ if (!ptr)
+ return ERR_PTR(-ENOMEM);
+
+ tcd = __thermal_cooling_device_register(np, 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_of_cooling_device_register);
diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index 0ddc77aeeca2..d9ad860cee87 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -198,6 +198,15 @@ struct thermal_zone_device *devm_thermal_of_zone_register(struct device *dev, in
void devm_thermal_of_zone_unregister(struct device *dev, struct thermal_zone_device *tz);
+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,
+ const char *type, void *devdata,
+ const struct thermal_cooling_device_ops *ops);
#else
static inline
@@ -211,6 +220,23 @@ static inline void devm_thermal_of_zone_unregister(struct device *dev,
struct thermal_zone_device *tz)
{
}
+
+static inline 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)
+{
+ return ERR_PTR(-ENODEV);
+}
+
+static inline struct thermal_cooling_device *
+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)
+{
+ return ERR_PTR(-ENODEV);
+}
#endif
int for_each_thermal_trip(struct thermal_zone_device *tz,
@@ -252,14 +278,6 @@ 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 *);
-struct thermal_cooling_device *
-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);
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);
@@ -305,18 +323,7 @@ thermal_cooling_device_register(const char *type, void *devdata,
const struct thermal_cooling_device_ops *ops)
{ return ERR_PTR(-ENODEV); }
static inline 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)
-{ return ERR_PTR(-ENODEV); }
-static inline struct thermal_cooling_device *
-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)
-{
- return ERR_PTR(-ENODEV);
-}
+
static inline void thermal_cooling_device_unregister(
struct thermal_cooling_device *cdev)
{ }
--
2.43.0