path: root/Documentation/powerpc/dts-bindings/gpio/led.txt
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authorAntonio Ospite <ospite@studenti.unina.it>2009-06-19 13:55:42 +0200
committerRichard Purdie <rpurdie@linux.intel.com>2009-06-23 20:21:38 +0100
commit5054d39e327f76df022163a2ebd02e444c5d65f9 (patch)
tree915f4a5406a1147524ba8a2aa7ab42074127be84 /Documentation/powerpc/dts-bindings/gpio/led.txt
parent07172d2bfa339d6c150d8cdd7c02128177feffbb (diff)
leds: LED driver for National Semiconductor LP3944 Funlight Chip
LEDs driver for National Semiconductor LP3944 Funlight Chip http://www.national.com/pf/LP/LP3944.html This helper chip can drive up to 8 leds, with two programmable DIM modes; it could even be used as a gpio expander but this driver assumes it is used as a led controller. The DIM modes are used to set _blink_ patterns for leds, the pattern is specified supplying two parameters: - period: from 0s to 1.6s - duty cycle: percentage of the period the led is on, from 0 to 100 LP3944 can be found on Motorola A910 smartphone, where it drives the rgb leds, the camera flash light and the displays backlights. Signed-off-by: Antonio Ospite <ospite@studenti.unina.it> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
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