On Mon, 11 Jul 2011 16:45:53 +0300 Felipe Balbi <[email protected]> wrote:
> On Mon, Jul 11, 2011 at 03:41:26PM +0200, Michael Büsch wrote: > > On Mon, 11 Jul 2011 16:12:32 +0300 > > Felipe Balbi <[email protected]> wrote: > > > > Are you planning to implement a backlight driver for tahvo? I'm actually > > > > using the functionality that you removed in this patchset in the OpenWRT > > > > distribution. > > > > > > if you have some extra documentation available, I could implement it > > > whenever I have some extra couple hours to play with this again... I > > > have no docs at all, but a led-tahvo.c would be really simple to get > > > done :-) > > > > All I have is the old code. No docs. It seems rather simple, though. > > Only a PWM register. That's pretty straightforward. > > cool, any pointers would be good ;-) Pointers to what? How PWM works? http://en.wikipedia.org/wiki/Pulse_width_modulation You probably don't need to know the details, though. Just write a 0 to the register to turn the LED off. And write a 0xF (or 0x7F depending on tahvo revision) to the register to turn it fully on. Any value in between to dim the LED. -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
