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

[Daniel Lezcano]

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@xxxxxxxxxxxxxxxx>
---
 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