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