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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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+
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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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+
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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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+
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