@@ -72,6 +72,12 @@ Description:
/sys/class/leds/<led> once a given trigger is selected. For
their documentation see `sysfs-class-led-trigger-*`.
+ Writing "none" removes the trigger for this LED.
+
+ Writing "default" sets the trigger to the LED's default trigger
+ (which would often be configured in the device tree for the
+ hardware).
+
What: /sys/class/leds/<led>/inverted
Date: January 2011
KernelVersion: 2.6.38
@@ -54,6 +54,11 @@ ssize_t led_trigger_write(struct file *filp, struct kobject *kobj,
goto unlock;
}
+ if (sysfs_streq(buf, "default")) {
+ led_trigger_set_default(led_cdev);
+ goto unlock;
+ }
+
down_read(&triggers_list_lock);
list_for_each_entry(trig, &trigger_list, next_trig) {
if (sysfs_streq(buf, trig->name) && trigger_relevant(led_cdev, trig)) {
@@ -98,6 +103,9 @@ static int led_trigger_format(char *buf, size_t size,
int len = led_trigger_snprintf(buf, size, "%s",
led_cdev->trigger ? "none" : "[none]");
+ if (led_cdev->default_trigger)
+ len += led_trigger_snprintf(buf + len, size - len, " default");
+
list_for_each_entry(trig, &trigger_list, next_trig) {
bool hit;
@@ -281,6 +289,11 @@ void led_trigger_set_default(struct led_classdev *led_cdev)
if (!led_cdev->default_trigger)
return;
+ if (!strcmp(led_cdev->default_trigger, "none")) {
+ led_trigger_remove(led_cdev);
+ return;
+ }
+
down_read(&triggers_list_lock);
down_write(&led_cdev->trigger_lock);
list_for_each_entry(trig, &trigger_list, next_trig) {