leds: unify the location of led-trigger API

Part of led-trigger API was in the private drivers/leds/leds.h header.
Move it to the include/linux/leds.h header to unify the API location
and announce it as public. It has been already exported from
led-triggers.c with EXPORT_SYMBOL_GPL macro. The no-op definitions are
changed from macros to inline to match the style of the surrounding code.

Signed-off-by: Jacek Anaszewski <[e-mail]>
Cc: Richard Purdie <[e-mail]>
Acked-by: Sakari Ailus <[e-mail]>
Signed-off-by: Bryan Wu <[e-mail]>

drivers/leds/leds.h

···
 #ifndef __LEDS_H_INCLUDED
 #define __LEDS_H_INCLUDED
 
-#include <linux/device.h>
 #include <linux/rwsem.h>
 #include <linux/leds.h>
 
···
 
 extern struct rw_semaphore leds_list_lock;
 extern struct list_head leds_list;
-
-#ifdef CONFIG_LEDS_TRIGGERS
-void led_trigger_set_default(struct led_classdev *led_cdev);
-void led_trigger_set(struct led_classdev *led_cdev,
-			struct led_trigger *trigger);
-void led_trigger_remove(struct led_classdev *led_cdev);
-
-static inline void *led_get_trigger_data(struct led_classdev *led_cdev)
-{
-	return led_cdev->trigger_data;
-}
-
-#else
-#define led_trigger_set_default(x) do {} while (0)
-#define led_trigger_set(x, y) do {} while (0)
-#define led_trigger_remove(x) do {} while (0)
-#define led_get_trigger_data(x) (NULL)
-#endif
-
-ssize_t led_trigger_store(struct device *dev, struct device_attribute *attr,
-			const char *buf, size_t count);
-ssize_t led_trigger_show(struct device *dev, struct device_attribute *attr,
-			char *buf);
 
 #endif	/* __LEDS_H_INCLUDED */

include/linux/leds.h

···
 #ifndef __LINUX_LEDS_H_INCLUDED
 #define __LINUX_LEDS_H_INCLUDED
 
+#include <linux/device.h>
 #include <linux/list.h>
 #include <linux/mutex.h>
 #include <linux/rwsem.h>
···
 	struct list_head  next_trig;
 };
 
+ssize_t led_trigger_store(struct device *dev, struct device_attribute *attr,
+			const char *buf, size_t count);
+ssize_t led_trigger_show(struct device *dev, struct device_attribute *attr,
+			char *buf);
+
 /* Registration functions for complex triggers */
 extern int led_trigger_register(struct led_trigger *trigger);
 extern void led_trigger_unregister(struct led_trigger *trigger);
···
 				      unsigned long *delay_on,
 				      unsigned long *delay_off,
 				      int invert);
+extern void led_trigger_set_default(struct led_classdev *led_cdev);
+extern void led_trigger_set(struct led_classdev *led_cdev,
+			struct led_trigger *trigger);
+extern void led_trigger_remove(struct led_classdev *led_cdev);
+
+static inline void *led_get_trigger_data(struct led_classdev *led_cdev)
+{
+	return led_cdev->trigger_data;
+}
+
 /**
  * led_trigger_rename_static - rename a trigger
  * @name: the new trigger name
···
 static inline void led_trigger_unregister_simple(struct led_trigger *trigger) {}
 static inline void led_trigger_event(struct led_trigger *trigger,
 				enum led_brightness event) {}
+static inline void led_trigger_set_default(struct led_classdev *led_cdev) {}
+static inline void led_trigger_set(struct led_classdev *led_cdev,
+				struct led_trigger *trigger) {}
+static inline void led_trigger_remove(struct led_classdev *led_cdev) {}
+static inline void *led_get_trigger_data(struct led_classdev *led_cdev)
+{
+	return NULL;
+}
+
 #endif /* CONFIG_LEDS_TRIGGERS */
 
 /* Trigger specific functions */