summaryrefslogtreecommitdiffstats
path: root/kernel/Documentation/ABI/testing/sysfs-class-led
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/Documentation/ABI/testing/sysfs-class-led')
-rw-r--r--kernel/Documentation/ABI/testing/sysfs-class-led37
1 files changed, 37 insertions, 0 deletions
diff --git a/kernel/Documentation/ABI/testing/sysfs-class-led b/kernel/Documentation/ABI/testing/sysfs-class-led
new file mode 100644
index 000000000..3646ec85d
--- /dev/null
+++ b/kernel/Documentation/ABI/testing/sysfs-class-led
@@ -0,0 +1,37 @@
+What: /sys/class/leds/<led>/brightness
+Date: March 2006
+KernelVersion: 2.6.17
+Contact: Richard Purdie <rpurdie@rpsys.net>
+Description:
+ Set the brightness of the LED. Most LEDs don't
+ have hardware brightness support so will just be turned on for
+ non-zero brightness settings. The value is between 0 and
+ /sys/class/leds/<led>/max_brightness.
+
+What: /sys/class/leds/<led>/max_brightness
+Date: March 2006
+KernelVersion: 2.6.17
+Contact: Richard Purdie <rpurdie@rpsys.net>
+Description:
+ Maximum brightness level for this led, default is 255 (LED_FULL).
+
+What: /sys/class/leds/<led>/trigger
+Date: March 2006
+KernelVersion: 2.6.17
+Contact: Richard Purdie <rpurdie@rpsys.net>
+Description:
+ Set the trigger for this LED. A trigger is a kernel based source
+ of led events.
+ You can change triggers in a similar manner to the way an IO
+ scheduler is chosen. Trigger specific parameters can appear in
+ /sys/class/leds/<led> once a given trigger is selected.
+
+What: /sys/class/leds/<led>/inverted
+Date: January 2011
+KernelVersion: 2.6.38
+Contact: Richard Purdie <rpurdie@rpsys.net>
+Description:
+ Invert the LED on/off state. This parameter is specific to
+ gpio and backlight triggers. In case of the backlight trigger,
+ it is useful when driving a LED which is intended to indicate
+ a device in a standby like state.