consolidate asm/const.h to linux/const.h

[sfrench/cifs-2.6.git] / include / linux / leds.h

diff --git a/include/linux/leds.h b/include/linux/leds.h
index 6812640b39cc4bb3290fde6a03f2359c0bd3e350..88afceffb7cb45df03ecbcd1045af2117f429fb1 100644 (file)
--- a/include/linux/leds.h
+++ b/include/linux/leds.h
@@ -12,6 +12,9 @@
 #ifndef __LINUX_LEDS_H_INCLUDED
 #define __LINUX_LEDS_H_INCLUDED
 
+#include <linux/list.h>
+#include <linux/spinlock.h>
+
 struct device;
 struct class_device;
 /*
@@ -19,33 +22,92 @@ struct class_device;
  */
 
 enum led_brightness {
-       LED_OFF = 0,
-       LED_HALF = 127,
-       LED_FULL = 255,
+       LED_OFF         = 0,
+       LED_HALF        = 127,
+       LED_FULL        = 255,
 };
 
 struct led_classdev {
-       const char *name;
-       int brightness;
-       int flags;
-#define LED_SUSPENDED       (1 << 0)
+       const char              *name;
+       int                      brightness;
+       int                      flags;
+
+#define LED_SUSPENDED          (1 << 0)
+
+       /* Set LED brightness level */
+       void            (*brightness_set)(struct led_classdev *led_cdev,
+                                         enum led_brightness brightness);
 
-       /* A function to set the brightness of the led */
-       void (*brightness_set)(struct led_classdev *led_cdev,
-                               enum led_brightness brightness);
+       struct class_device     *class_dev;
+       struct list_head         node;                  /* LED Device list */
+       char                    *default_trigger;       /* Trigger to use */
 
-       struct class_device *class_dev;
-       /* LED Device linked list */
-       struct list_head node;
+#ifdef CONFIG_LEDS_TRIGGERS
+       /* Protects the trigger data below */
+       rwlock_t                 trigger_lock;
 
-       /* Trigger data */
-       char *default_trigger;
+       struct led_trigger      *trigger;
+       struct list_head         trig_list;
+       void                    *trigger_data;
+#endif
 };
 
 extern int led_classdev_register(struct device *parent,
-                               struct led_classdev *led_cdev);
+                                struct led_classdev *led_cdev);
 extern void led_classdev_unregister(struct led_classdev *led_cdev);
 extern void led_classdev_suspend(struct led_classdev *led_cdev);
 extern void led_classdev_resume(struct led_classdev *led_cdev);
 
+/*
+ * LED Triggers
+ */
+#ifdef CONFIG_LEDS_TRIGGERS
+
+#define TRIG_NAME_MAX 50
+
+struct led_trigger {
+       /* Trigger Properties */
+       const char       *name;
+       void            (*activate)(struct led_classdev *led_cdev);
+       void            (*deactivate)(struct led_classdev *led_cdev);
+
+       /* LEDs under control by this trigger (for simple triggers) */
+       rwlock_t          leddev_list_lock;
+       struct list_head  led_cdevs;
+
+       /* Link to next registered trigger */
+       struct list_head  next_trig;
+};
+
+/* Registration functions for complex triggers */
+extern int led_trigger_register(struct led_trigger *trigger);
+extern void led_trigger_unregister(struct led_trigger *trigger);
+
+/* Registration functions for simple triggers */
+#define DEFINE_LED_TRIGGER(x)          static struct led_trigger *x;
+#define DEFINE_LED_TRIGGER_GLOBAL(x)   struct led_trigger *x;
+extern void led_trigger_register_simple(const char *name,
+                               struct led_trigger **trigger);
+extern void led_trigger_unregister_simple(struct led_trigger *trigger);
+extern void led_trigger_event(struct led_trigger *trigger,
+                               enum led_brightness event);
+
+#else
+
+/* Triggers aren't active - null macros */
+#define DEFINE_LED_TRIGGER(x)
+#define DEFINE_LED_TRIGGER_GLOBAL(x)
+#define led_trigger_register_simple(x, y) do {} while(0)
+#define led_trigger_unregister_simple(x) do {} while(0)
+#define led_trigger_event(x, y) do {} while(0)
+
+#endif
+
+/* Trigger specific functions */
+#ifdef CONFIG_LEDS_TRIGGER_IDE_DISK
+extern void ledtrig_ide_activity(void);
+#else
+#define ledtrig_ide_activity() do {} while(0)
+#endif
+
 #endif         /* __LINUX_LEDS_H_INCLUDED */