Documentation/leds/leds-lm3556.rst

6   1.5 A Synchronous Boost LED Flash Driver w/ High-Side Current Source
10       - Daniel Jeong
12 	Contact:Daniel Jeong(daniel.jeong-at-ti.com, gshark.jeong-at-gmail.com)
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16 There are 3 functions in LM3556, Flash, Torch and Indicator.
18 Flash Mode
21 In Flash Mode, the LED current source(LED) provides 16 target current levels
22 from 93.75 mA to 1500 mA.The Flash currents are adjusted via the CURRENT
23 CONTROL REGISTER(0x09).Flash mode is activated by the ENABLE REGISTER(0x0A),
26 LM3556 Flash can be controlled through /sys/class/leds/flash/brightness file
31 Flash Example:
35 	#echo 0 > /sys/class/leds/flash/brightness
39 	#echo 1 > /sys/class/leds/flash/brightness
45 	#echo 16 > /sys/class/leds/flash/brightness
47 Torch Mode
50 In Torch Mode, the current source(LED) is programmed via the CURRENT CONTROL
51 REGISTER(0x09).Torch Mode is activated by the ENABLE REGISTER(0x0A) or by the
74 Indicator Mode
78 and 4 patterns are pre-defined in indicator_pattern array.
80 According to N-lank, Pulse time and N Period values, different pattern wiill
84 Please refer datasheet for more detail about N-Blank, Pulse time and N Period.
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121 according to include/linux/platform_data/leds-lm3556.h, set the i2c board info