17 Dec, 2009

1 commit


24 Jun, 2009

1 commit

  • 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
    Signed-off-by: Richard Purdie

    Antonio Ospite