Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / Documentation / ABI / testing / sysfs-class-led

diff --git a/kernel/Documentation/ABI/testing/sysfs-class-led b/kernel/Documentation/ABI/testing/sysfs-class-led
new file mode 100644 (file)
index 0000000..3646ec8
--- /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.