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Diffstat (limited to 'kernel/Documentation/ABI/testing/sysfs-class-led')
| -rw-r--r-- | kernel/Documentation/ABI/testing/sysfs-class-led | 37 |
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. |