81 lines
3 KiB
Plaintext
81 lines
3 KiB
Plaintext
What: /sys/class/leds/<led>/flash_brightness
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Date: March 2015
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KernelVersion: 4.0
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Contact: Jacek Anaszewski <j.anaszewski@samsung.com>
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Description: read/write
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Set the brightness of this LED in the flash strobe mode, in
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microamperes. The file is created only for the flash LED devices
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that support setting flash brightness.
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The value is between 0 and
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/sys/class/leds/<led>/max_flash_brightness.
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What: /sys/class/leds/<led>/max_flash_brightness
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Date: March 2015
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KernelVersion: 4.0
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Contact: Jacek Anaszewski <j.anaszewski@samsung.com>
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Description: read only
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Maximum brightness level for this LED in the flash strobe mode,
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in microamperes.
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What: /sys/class/leds/<led>/flash_timeout
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Date: March 2015
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KernelVersion: 4.0
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Contact: Jacek Anaszewski <j.anaszewski@samsung.com>
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Description: read/write
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Hardware timeout for flash, in microseconds. The flash strobe
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is stopped after this period of time has passed from the start
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of the strobe. The file is created only for the flash LED
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devices that support setting flash timeout.
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What: /sys/class/leds/<led>/max_flash_timeout
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Date: March 2015
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KernelVersion: 4.0
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Contact: Jacek Anaszewski <j.anaszewski@samsung.com>
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Description: read only
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Maximum flash timeout for this LED, in microseconds.
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What: /sys/class/leds/<led>/flash_strobe
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Date: March 2015
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KernelVersion: 4.0
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Contact: Jacek Anaszewski <j.anaszewski@samsung.com>
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Description: read/write
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Flash strobe state. When written with 1 it triggers flash strobe
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and when written with 0 it turns the flash off.
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On read 1 means that flash is currently strobing and 0 means
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that flash is off.
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What: /sys/class/leds/<led>/flash_fault
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Date: March 2015
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KernelVersion: 4.0
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Contact: Jacek Anaszewski <j.anaszewski@samsung.com>
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Description: read only
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Space separated list of flash faults that may have occurred.
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Flash faults are re-read after strobing the flash. Possible
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flash faults:
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* led-over-voltage - flash controller voltage to the flash LED
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has exceeded the limit specific to the flash controller
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* flash-timeout-exceeded - the flash strobe was still on when
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the timeout set by the user has expired; not all flash
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controllers may set this in all such conditions
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* controller-over-temperature - the flash controller has
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overheated
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* controller-short-circuit - the short circuit protection
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of the flash controller has been triggered
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* led-power-supply-over-current - current in the LED power
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supply has exceeded the limit specific to the flash
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controller
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* indicator-led-fault - the flash controller has detected
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a short or open circuit condition on the indicator LED
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* led-under-voltage - flash controller voltage to the flash
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LED has been below the minimum limit specific to
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the flash
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* controller-under-voltage - the input voltage of the flash
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controller is below the limit under which strobing the
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flash at full current will not be possible;
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the condition persists until this flag is no longer set
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* led-over-temperature - the temperature of the LED has exceeded
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its allowed upper limit
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