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path: root/drivers/leds/led-triggers.c
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Diffstat (limited to 'drivers/leds/led-triggers.c')
-rw-r--r--drivers/leds/led-triggers.c110
1 files changed, 55 insertions, 55 deletions
diff --git a/drivers/leds/led-triggers.c b/drivers/leds/led-triggers.c
index 21dd96909444..0f242b3f09b6 100644
--- a/drivers/leds/led-triggers.c
+++ b/drivers/leds/led-triggers.c
@@ -29,6 +29,8 @@
29static DECLARE_RWSEM(triggers_list_lock); 29static DECLARE_RWSEM(triggers_list_lock);
30static LIST_HEAD(trigger_list); 30static LIST_HEAD(trigger_list);
31 31
32 /* Used by LED Class */
33
32ssize_t led_trigger_store(struct device *dev, struct device_attribute *attr, 34ssize_t led_trigger_store(struct device *dev, struct device_attribute *attr,
33 const char *buf, size_t count) 35 const char *buf, size_t count)
34{ 36{
@@ -64,7 +66,7 @@ ssize_t led_trigger_store(struct device *dev, struct device_attribute *attr,
64 66
65 return -EINVAL; 67 return -EINVAL;
66} 68}
67 69EXPORT_SYMBOL_GPL(led_trigger_store);
68 70
69ssize_t led_trigger_show(struct device *dev, struct device_attribute *attr, 71ssize_t led_trigger_show(struct device *dev, struct device_attribute *attr,
70 char *buf) 72 char *buf)
@@ -94,24 +96,7 @@ ssize_t led_trigger_show(struct device *dev, struct device_attribute *attr,
94 len += sprintf(len+buf, "\n"); 96 len += sprintf(len+buf, "\n");
95 return len; 97 return len;
96} 98}
97 99EXPORT_SYMBOL_GPL(led_trigger_show);
98void led_trigger_event(struct led_trigger *trigger,
99 enum led_brightness brightness)
100{
101 struct list_head *entry;
102
103 if (!trigger)
104 return;
105
106 read_lock(&trigger->leddev_list_lock);
107 list_for_each(entry, &trigger->led_cdevs) {
108 struct led_classdev *led_cdev;
109
110 led_cdev = list_entry(entry, struct led_classdev, trig_list);
111 led_set_brightness(led_cdev, brightness);
112 }
113 read_unlock(&trigger->leddev_list_lock);
114}
115 100
116/* Caller must ensure led_cdev->trigger_lock held */ 101/* Caller must ensure led_cdev->trigger_lock held */
117void led_trigger_set(struct led_classdev *led_cdev, struct led_trigger *trigger) 102void led_trigger_set(struct led_classdev *led_cdev, struct led_trigger *trigger)
@@ -122,7 +107,8 @@ void led_trigger_set(struct led_classdev *led_cdev, struct led_trigger *trigger)
122 if (led_cdev->trigger) { 107 if (led_cdev->trigger) {
123 write_lock_irqsave(&led_cdev->trigger->leddev_list_lock, flags); 108 write_lock_irqsave(&led_cdev->trigger->leddev_list_lock, flags);
124 list_del(&led_cdev->trig_list); 109 list_del(&led_cdev->trig_list);
125 write_unlock_irqrestore(&led_cdev->trigger->leddev_list_lock, flags); 110 write_unlock_irqrestore(&led_cdev->trigger->leddev_list_lock,
111 flags);
126 if (led_cdev->trigger->deactivate) 112 if (led_cdev->trigger->deactivate)
127 led_cdev->trigger->deactivate(led_cdev); 113 led_cdev->trigger->deactivate(led_cdev);
128 led_set_brightness(led_cdev, LED_OFF); 114 led_set_brightness(led_cdev, LED_OFF);
@@ -136,6 +122,7 @@ void led_trigger_set(struct led_classdev *led_cdev, struct led_trigger *trigger)
136 } 122 }
137 led_cdev->trigger = trigger; 123 led_cdev->trigger = trigger;
138} 124}
125EXPORT_SYMBOL_GPL(led_trigger_set);
139 126
140void led_trigger_remove(struct led_classdev *led_cdev) 127void led_trigger_remove(struct led_classdev *led_cdev)
141{ 128{
@@ -143,6 +130,7 @@ void led_trigger_remove(struct led_classdev *led_cdev)
143 led_trigger_set(led_cdev, NULL); 130 led_trigger_set(led_cdev, NULL);
144 up_write(&led_cdev->trigger_lock); 131 up_write(&led_cdev->trigger_lock);
145} 132}
133EXPORT_SYMBOL_GPL(led_trigger_remove);
146 134
147void led_trigger_set_default(struct led_classdev *led_cdev) 135void led_trigger_set_default(struct led_classdev *led_cdev)
148{ 136{
@@ -160,6 +148,9 @@ void led_trigger_set_default(struct led_classdev *led_cdev)
160 up_write(&led_cdev->trigger_lock); 148 up_write(&led_cdev->trigger_lock);
161 up_read(&triggers_list_lock); 149 up_read(&triggers_list_lock);
162} 150}
151EXPORT_SYMBOL_GPL(led_trigger_set_default);
152
153/* LED Trigger Interface */
163 154
164int led_trigger_register(struct led_trigger *trigger) 155int led_trigger_register(struct led_trigger *trigger)
165{ 156{
@@ -186,26 +177,7 @@ int led_trigger_register(struct led_trigger *trigger)
186 177
187 return 0; 178 return 0;
188} 179}
189 180EXPORT_SYMBOL_GPL(led_trigger_register);
190void led_trigger_register_simple(const char *name, struct led_trigger **tp)
191{
192 struct led_trigger *trigger;
193 int err;
194
195 trigger = kzalloc(sizeof(struct led_trigger), GFP_KERNEL);
196
197 if (trigger) {
198 trigger->name = name;
199 err = led_trigger_register(trigger);
200 if (err < 0)
201 printk(KERN_WARNING "LED trigger %s failed to register"
202 " (%d)\n", name, err);
203 } else
204 printk(KERN_WARNING "LED trigger %s failed to register"
205 " (no memory)\n", name);
206
207 *tp = trigger;
208}
209 181
210void led_trigger_unregister(struct led_trigger *trigger) 182void led_trigger_unregister(struct led_trigger *trigger)
211{ 183{
@@ -226,29 +198,57 @@ void led_trigger_unregister(struct led_trigger *trigger)
226 } 198 }
227 up_read(&leds_list_lock); 199 up_read(&leds_list_lock);
228} 200}
201EXPORT_SYMBOL_GPL(led_trigger_unregister);
229 202
230void led_trigger_unregister_simple(struct led_trigger *trigger) 203/* Simple LED Tigger Interface */
204
205void led_trigger_event(struct led_trigger *trigger,
206 enum led_brightness brightness)
231{ 207{
232 if (trigger) 208 struct list_head *entry;
233 led_trigger_unregister(trigger); 209
234 kfree(trigger); 210 if (!trigger)
211 return;
212
213 read_lock(&trigger->leddev_list_lock);
214 list_for_each(entry, &trigger->led_cdevs) {
215 struct led_classdev *led_cdev;
216
217 led_cdev = list_entry(entry, struct led_classdev, trig_list);
218 led_set_brightness(led_cdev, brightness);
219 }
220 read_unlock(&trigger->leddev_list_lock);
235} 221}
222EXPORT_SYMBOL_GPL(led_trigger_event);
236 223
237/* Used by LED Class */ 224void led_trigger_register_simple(const char *name, struct led_trigger **tp)
238EXPORT_SYMBOL_GPL(led_trigger_set); 225{
239EXPORT_SYMBOL_GPL(led_trigger_remove); 226 struct led_trigger *trigger;
240EXPORT_SYMBOL_GPL(led_trigger_set_default); 227 int err;
241EXPORT_SYMBOL_GPL(led_trigger_show);
242EXPORT_SYMBOL_GPL(led_trigger_store);
243 228
244/* LED Trigger Interface */ 229 trigger = kzalloc(sizeof(struct led_trigger), GFP_KERNEL);
245EXPORT_SYMBOL_GPL(led_trigger_register);
246EXPORT_SYMBOL_GPL(led_trigger_unregister);
247 230
248/* Simple LED Tigger Interface */ 231 if (trigger) {
232 trigger->name = name;
233 err = led_trigger_register(trigger);
234 if (err < 0)
235 printk(KERN_WARNING "LED trigger %s failed to register"
236 " (%d)\n", name, err);
237 } else
238 printk(KERN_WARNING "LED trigger %s failed to register"
239 " (no memory)\n", name);
240
241 *tp = trigger;
242}
249EXPORT_SYMBOL_GPL(led_trigger_register_simple); 243EXPORT_SYMBOL_GPL(led_trigger_register_simple);
244
245void led_trigger_unregister_simple(struct led_trigger *trigger)
246{
247 if (trigger)
248 led_trigger_unregister(trigger);
249 kfree(trigger);
250}
250EXPORT_SYMBOL_GPL(led_trigger_unregister_simple); 251EXPORT_SYMBOL_GPL(led_trigger_unregister_simple);
251EXPORT_SYMBOL_GPL(led_trigger_event);
252 252
253MODULE_AUTHOR("Richard Purdie"); 253MODULE_AUTHOR("Richard Purdie");
254MODULE_LICENSE("GPL"); 254MODULE_LICENSE("GPL");