diff options
Diffstat (limited to 'drivers/leds/led-triggers.c')
-rw-r--r-- | drivers/leds/led-triggers.c | 120 |
1 files changed, 63 insertions, 57 deletions
diff --git a/drivers/leds/led-triggers.c b/drivers/leds/led-triggers.c index 13c9026d68a..0f242b3f09b 100644 --- a/drivers/leds/led-triggers.c +++ b/drivers/leds/led-triggers.c @@ -29,6 +29,8 @@ static DECLARE_RWSEM(triggers_list_lock); static LIST_HEAD(trigger_list); + /* Used by LED Class */ + ssize_t led_trigger_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { @@ -45,9 +47,7 @@ ssize_t led_trigger_store(struct device *dev, struct device_attribute *attr, trigger_name[len - 1] = '\0'; if (!strcmp(trigger_name, "none")) { - down_write(&led_cdev->trigger_lock); - led_trigger_set(led_cdev, NULL); - up_write(&led_cdev->trigger_lock); + led_trigger_remove(led_cdev); return count; } @@ -66,7 +66,7 @@ ssize_t led_trigger_store(struct device *dev, struct device_attribute *attr, return -EINVAL; } - +EXPORT_SYMBOL_GPL(led_trigger_store); ssize_t led_trigger_show(struct device *dev, struct device_attribute *attr, char *buf) @@ -96,24 +96,7 @@ ssize_t led_trigger_show(struct device *dev, struct device_attribute *attr, len += sprintf(len+buf, "\n"); return len; } - -void led_trigger_event(struct led_trigger *trigger, - enum led_brightness brightness) -{ - struct list_head *entry; - - if (!trigger) - return; - - read_lock(&trigger->leddev_list_lock); - list_for_each(entry, &trigger->led_cdevs) { - struct led_classdev *led_cdev; - - led_cdev = list_entry(entry, struct led_classdev, trig_list); - led_set_brightness(led_cdev, brightness); - } - read_unlock(&trigger->leddev_list_lock); -} +EXPORT_SYMBOL_GPL(led_trigger_show); /* Caller must ensure led_cdev->trigger_lock held */ void led_trigger_set(struct led_classdev *led_cdev, struct led_trigger *trigger) @@ -124,7 +107,8 @@ void led_trigger_set(struct led_classdev *led_cdev, struct led_trigger *trigger) if (led_cdev->trigger) { write_lock_irqsave(&led_cdev->trigger->leddev_list_lock, flags); list_del(&led_cdev->trig_list); - write_unlock_irqrestore(&led_cdev->trigger->leddev_list_lock, flags); + write_unlock_irqrestore(&led_cdev->trigger->leddev_list_lock, + flags); if (led_cdev->trigger->deactivate) led_cdev->trigger->deactivate(led_cdev); led_set_brightness(led_cdev, LED_OFF); @@ -138,6 +122,15 @@ void led_trigger_set(struct led_classdev *led_cdev, struct led_trigger *trigger) } led_cdev->trigger = trigger; } +EXPORT_SYMBOL_GPL(led_trigger_set); + +void led_trigger_remove(struct led_classdev *led_cdev) +{ + down_write(&led_cdev->trigger_lock); + led_trigger_set(led_cdev, NULL); + up_write(&led_cdev->trigger_lock); +} +EXPORT_SYMBOL_GPL(led_trigger_remove); void led_trigger_set_default(struct led_classdev *led_cdev) { @@ -155,6 +148,9 @@ void led_trigger_set_default(struct led_classdev *led_cdev) up_write(&led_cdev->trigger_lock); up_read(&triggers_list_lock); } +EXPORT_SYMBOL_GPL(led_trigger_set_default); + +/* LED Trigger Interface */ int led_trigger_register(struct led_trigger *trigger) { @@ -181,26 +177,7 @@ int led_trigger_register(struct led_trigger *trigger) return 0; } - -void led_trigger_register_simple(const char *name, struct led_trigger **tp) -{ - struct led_trigger *trigger; - int err; - - trigger = kzalloc(sizeof(struct led_trigger), GFP_KERNEL); - - if (trigger) { - trigger->name = name; - err = led_trigger_register(trigger); - if (err < 0) - printk(KERN_WARNING "LED trigger %s failed to register" - " (%d)\n", name, err); - } else - printk(KERN_WARNING "LED trigger %s failed to register" - " (no memory)\n", name); - - *tp = trigger; -} +EXPORT_SYMBOL_GPL(led_trigger_register); void led_trigger_unregister(struct led_trigger *trigger) { @@ -221,6 +198,49 @@ void led_trigger_unregister(struct led_trigger *trigger) } up_read(&leds_list_lock); } +EXPORT_SYMBOL_GPL(led_trigger_unregister); + +/* Simple LED Tigger Interface */ + +void led_trigger_event(struct led_trigger *trigger, + enum led_brightness brightness) +{ + struct list_head *entry; + + if (!trigger) + return; + + read_lock(&trigger->leddev_list_lock); + list_for_each(entry, &trigger->led_cdevs) { + struct led_classdev *led_cdev; + + led_cdev = list_entry(entry, struct led_classdev, trig_list); + led_set_brightness(led_cdev, brightness); + } + read_unlock(&trigger->leddev_list_lock); +} +EXPORT_SYMBOL_GPL(led_trigger_event); + +void led_trigger_register_simple(const char *name, struct led_trigger **tp) +{ + struct led_trigger *trigger; + int err; + + trigger = kzalloc(sizeof(struct led_trigger), GFP_KERNEL); + + if (trigger) { + trigger->name = name; + err = led_trigger_register(trigger); + if (err < 0) + printk(KERN_WARNING "LED trigger %s failed to register" + " (%d)\n", name, err); + } else + printk(KERN_WARNING "LED trigger %s failed to register" + " (no memory)\n", name); + + *tp = trigger; +} +EXPORT_SYMBOL_GPL(led_trigger_register_simple); void led_trigger_unregister_simple(struct led_trigger *trigger) { @@ -228,21 +248,7 @@ void led_trigger_unregister_simple(struct led_trigger *trigger) led_trigger_unregister(trigger); kfree(trigger); } - -/* Used by LED Class */ -EXPORT_SYMBOL_GPL(led_trigger_set); -EXPORT_SYMBOL_GPL(led_trigger_set_default); -EXPORT_SYMBOL_GPL(led_trigger_show); -EXPORT_SYMBOL_GPL(led_trigger_store); - -/* LED Trigger Interface */ -EXPORT_SYMBOL_GPL(led_trigger_register); -EXPORT_SYMBOL_GPL(led_trigger_unregister); - -/* Simple LED Tigger Interface */ -EXPORT_SYMBOL_GPL(led_trigger_register_simple); EXPORT_SYMBOL_GPL(led_trigger_unregister_simple); -EXPORT_SYMBOL_GPL(led_trigger_event); MODULE_AUTHOR("Richard Purdie"); MODULE_LICENSE("GPL"); |