0001 What: /sys/class/leds/<led>/flash_brightness
0002 Date: March 2015
0003 KernelVersion: 4.0
0004 Contact: Jacek Anaszewski <j.anaszewski@samsung.com>
0005 Description: read/write
0006 Set the brightness of this LED in the flash strobe mode, in
0007 microamperes. The file is created only for the flash LED devices
0008 that support setting flash brightness.
0009
0010 The value is between 0 and
0011 /sys/class/leds/<led>/max_flash_brightness.
0012
0013 What: /sys/class/leds/<led>/max_flash_brightness
0014 Date: March 2015
0015 KernelVersion: 4.0
0016 Contact: Jacek Anaszewski <j.anaszewski@samsung.com>
0017 Description: read only
0018 Maximum brightness level for this LED in the flash strobe mode,
0019 in microamperes.
0020
0021 What: /sys/class/leds/<led>/flash_timeout
0022 Date: March 2015
0023 KernelVersion: 4.0
0024 Contact: Jacek Anaszewski <j.anaszewski@samsung.com>
0025 Description: read/write
0026 Hardware timeout for flash, in microseconds. The flash strobe
0027 is stopped after this period of time has passed from the start
0028 of the strobe. The file is created only for the flash LED
0029 devices that support setting flash timeout.
0030
0031 What: /sys/class/leds/<led>/max_flash_timeout
0032 Date: March 2015
0033 KernelVersion: 4.0
0034 Contact: Jacek Anaszewski <j.anaszewski@samsung.com>
0035 Description: read only
0036 Maximum flash timeout for this LED, in microseconds.
0037
0038 What: /sys/class/leds/<led>/flash_strobe
0039 Date: March 2015
0040 KernelVersion: 4.0
0041 Contact: Jacek Anaszewski <j.anaszewski@samsung.com>
0042 Description: read/write
0043 Flash strobe state. When written with 1 it triggers flash strobe
0044 and when written with 0 it turns the flash off.
0045
0046 On read 1 means that flash is currently strobing and 0 means
0047 that flash is off.
0048
0049 What: /sys/class/leds/<led>/flash_fault
0050 Date: March 2015
0051 KernelVersion: 4.0
0052 Contact: Jacek Anaszewski <j.anaszewski@samsung.com>
0053 Description: read only
0054 Space separated list of flash faults that may have occurred.
0055 Flash faults are re-read after strobing the flash. Possible
0056 flash faults:
0057
0058 * led-over-voltage
0059 flash controller voltage to the flash LED
0060 has exceeded the limit specific to the flash controller
0061 * flash-timeout-exceeded
0062 the flash strobe was still on when
0063 the timeout set by the user has expired; not all flash
0064 controllers may set this in all such conditions
0065 * controller-over-temperature
0066 the flash controller has
0067 overheated
0068 * controller-short-circuit
0069 the short circuit protection
0070 of the flash controller has been triggered
0071 * led-power-supply-over-current
0072 current in the LED power
0073 supply has exceeded the limit specific to the flash
0074 controller
0075 * indicator-led-fault
0076 the flash controller has detected
0077 a short or open circuit condition on the indicator LED
0078 * led-under-voltage
0079 flash controller voltage to the flash
0080 LED has been below the minimum limit specific to
0081 the flash
0082 * controller-under-voltage
0083 the input voltage of the flash
0084 controller is below the limit under which strobing the
0085 flash at full current will not be possible;
0086 the condition persists until this flag is no longer set
0087 * led-over-temperature
0088 the temperature of the LED has exceeded
0089 its allowed upper limit
