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| author | Antonio Ospite <ospite@studenti.unina.it> | 2009-06-19 13:55:42 +0200 |
|---|---|---|
| committer | Richard Purdie <rpurdie@linux.intel.com> | 2009-06-23 21:21:38 +0200 |
| commit | 5054d39e327f76df022163a2ebd02e444c5d65f9 (patch) | |
| tree | 915f4a5406a1147524ba8a2aa7ab42074127be84 /Documentation/powerpc/dts-bindings | |
| parent | leds: pca9532 - Indent using tabs, not spaces. (diff) | |
| download | linux-5054d39e327f76df022163a2ebd02e444c5d65f9.tar.xz linux-5054d39e327f76df022163a2ebd02e444c5d65f9.zip | |
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>
Diffstat (limited to 'Documentation/powerpc/dts-bindings')
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