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Viewing changes to Documentation/ABI/testing/sysfs-class-led

  • Committer: Package Import Robot
  • Author(s): Alessio Igor Bogani
  • Date: 2011-10-26 11:13:05 UTC
  • Revision ID: package-import@ubuntu.com-20111026111305-tz023xykf0i6eosh
Tags: upstream-3.2.0
Import upstream version 3.2.0

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Documentation/ABI/testing/sysfs-class-led
 
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What:           /sys/class/leds/<led>/brightness
 
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Date:           March 2006
 
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KernelVersion:  2.6.17
 
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Contact:        Richard Purdie <rpurdie@rpsys.net>
 
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Description:
 
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                Set the brightness of the LED. Most LEDs don't
 
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                have hardware brightness support so will just be turned on for
 
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                non-zero brightness settings. The value is between 0 and
 
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                /sys/class/leds/<led>/max_brightness.
 
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What:           /sys/class/leds/<led>/max_brightness
 
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Date:           March 2006
 
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KernelVersion:  2.6.17
 
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Contact:        Richard Purdie <rpurdie@rpsys.net>
 
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Description:
 
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                Maximum brightness level for this led, default is 255 (LED_FULL).
 
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What:           /sys/class/leds/<led>/trigger
 
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Date:           March 2006
 
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KernelVersion:  2.6.17
 
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Contact:        Richard Purdie <rpurdie@rpsys.net>
 
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Description:
 
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                Set the trigger for this LED. A trigger is a kernel based source
 
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                of led events.
 
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                You can change triggers in a similar manner to the way an IO
 
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                scheduler is chosen. Trigger specific parameters can appear in
 
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                /sys/class/leds/<led> once a given trigger is selected.
 
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What:           /sys/class/leds/<led>/inverted
 
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Date:           January 2011
 
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KernelVersion:  2.6.38
 
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Contact:        Richard Purdie <rpurdie@rpsys.net>
 
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Description:
 
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                Invert the LED on/off state. This parameter is specific to
 
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                gpio and backlight triggers. In case of the backlight trigger,
 
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                it is useful when driving a LED which is intended to indicate
 
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                a device in a standby like state.