Hi Mark On Thu, 15 Nov 2012, Mark Brown wrote:
> On Thu, Nov 15, 2012 at 08:15:15AM +0100, Guennadi Liakhovetski wrote: > > > parts are pretty simple - DCDC step-down, LDO. The first step-up DCDC > > isn't a problem either. It's the second step-up supply, that I'm having a > > problem with. It's output voltage can be regulated by using either a > > voltage feedback or the three current feedbacks. In the current feedback > > mode one has a choice between a manual mode, in which case you just choose > > one of the feedbacks and everything is simple again, or in automatic mode. > > This almost certainly has no other function than to drive a LED string > for a backlight; it's not sensible to represent it via the regulator > framework at all. Just implement it as a backlight and/or LED driver > and have done with it unless you can find some other use for it. Hm, interesting. In my case it is of course a backlight power source, but wouldn't it be too limiting to also implement it as a backlight driver? I guess I will do that, I'm not too interested in implementing something hugely generic, for which I have no use either, just wondering... So, I would be hiding all the flexibility in this case in platform data, including the selection of the feedback method (voltage vs. current), overvoltage protection and pins used... I guess, I'll just begin with implementing just one mode, the one used on my board and see if any other modes are ever needed. Thanks Guennadi --- Guennadi Liakhovetski, Ph.D. Freelance Open-Source Software Developer http://www.open-technology.de/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
