Re: [PATCH v4 1/5] gadget: Introduce the notifier functions

From	Pavel Machek <pavel@ucw.cz>
Newsgroups	linux.kernel
Subject	Re: [PATCH v4 1/5] gadget: Introduce the notifier functions
Date	2016-04-09 18:10 +0200
Message-ID	<rm3Cr-7IV-15@gated-at.bofh.it> (permalink)
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Hi!

> >> Also, because soon enough we will have to support USB Power Delivery
> >> with Type C connector, this is bound to change in the coming months.
> >> 
> >> Frankly, I wanted all of this to be decided in userland with the
> >> kernel just providing notification and basic safety checks (we don't
> >> want to allow a bogus userspace daemon frying anybody's devices).
> >> 
> >> How would you feel about that ?
> >
> > So init=/bin/bash boot no longer provides machine that charges itself?
> >
> > That would be bad. Traditionally, hardware controls battery charging,
> > and if hardware needs some help, we should do it in kernel, to mask
> > the difference from userspace.
> 
> this is a very valid point which I hadn't considered :-)
> 
> Seems like kernel it is, no matter how easy or how difficult it gets.

Basically yes. Note that for some bells & whistles, you can require userland help.

For example it would probably be ok if it charged slower than usual... but I guess
that does not really help in this case.

Best regards,
									Pavel

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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Re: [PATCH v4 1/5] gadget: Introduce the notifier functions Pavel Machek <pavel@ucw.cz> - 2016-04-09 18:10 +0200

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