Messages in this thread | | | Date | Thu, 8 Oct 2015 17:51:01 +0200 | From | Pavel Machek <> | Subject | Re: [PATCH v4 1/5] gadget: Introduce the notifier functions |
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Hi!
> > What's the advantage of pushing this to userspace? By the time we > > provide enough discoverability to enable userspace to configure itself > > it seems like we'd have enough information to do the job anyway. > > you're going to be dealing with a setup where each vendor does one thing > differently. Some will have it all in the SoC part of a single IP (dwc3 can be > configured that way), some will push it out to companion IC, some might even use > some mostly discrete setup and so on... > > We're gonna be dealing with a decision that involves information from multiple > subsystems (USB, regulator, hwmon, power supply to name a few). > > We tried doing it all in the kernel back in N800, N810 and N900/N9 days and it's > just plain difficult. To make matters worse, N900 had two USB PHYs, one for > actual runtime use and another just for detecting the charger type on the other > end.
N900 does charging from kernel these days.
Not being able to boot generic distribution would be regression there...
Pavel
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