From: Pavel Machek <pavel@ucw.cz>
To: Mark Brown <broonie@sirena.org.uk>
Cc: Felipe Balbi <me@felipebalbi.com>,
Liam Girdwood <lrg@slimlogic.co.uk>,
Mike Rapoport <mike@compulab.co.il>,
linux-kernel@vger.kernel.org
Subject: Re: Smart Battery System Design (was: Re: Question about userspace-consumer)
Date: Sun, 16 Aug 2009 00:34:34 +0200 [thread overview]
Message-ID: <20090815223434.GB27637@elf.ucw.cz> (raw)
In-Reply-To: <20090815164324.GA4252@sirena.org.uk>
On Sat 2009-08-15 17:43:24, Mark Brown wrote:
> On Fri, Aug 14, 2009 at 06:32:01PM +0200, Pavel Machek wrote:
>
> > Please don't put basic fastcharge logic to userspace:
>
> > * you still want to fastcharge at init=/bin/bash boot
>
> > * you want to fastcharge while machine is in s2ram. See spitz. Doing
> > that with userspace would be quite tricky.
>
> Depending on the technologies involved and how well integrated the power
> path management is with the battery charger fast charge during suspend
> may not actually be desirable. Some systems need or desire active
> thermal management of the system from the CPU during fast charge.
Do you have example of some system?
Ok, well... anyway many machines _want_ fastcharge while suspended,
and putting charging into userland would break them (or make that
fairly difficult).
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
next prev parent reply other threads:[~2009-08-15 22:34 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-10 20:05 Question about userspace-consumer Felipe Balbi
2009-08-10 21:58 ` Mark Brown
2009-08-11 5:44 ` Felipe Balbi
2009-08-11 9:40 ` Mark Brown
2009-08-11 10:30 ` Liam Girdwood
2009-08-11 20:49 ` Smart Battery System Design (was: Re: Question about userspace-consumer) Felipe Balbi
2009-08-11 20:59 ` Felipe Balbi
2009-08-11 22:36 ` Mark Brown
2009-08-12 6:47 ` Felipe Balbi
2009-08-12 10:05 ` Mark Brown
2009-08-12 19:07 ` Felipe Balbi
2009-08-12 22:53 ` Mark Brown
2009-08-14 16:32 ` Pavel Machek
2009-08-15 16:43 ` Mark Brown
2009-08-15 22:34 ` Pavel Machek [this message]
2009-08-16 9:18 ` Mark Brown
2009-08-22 9:28 ` Pavel Machek
2009-08-22 10:16 ` Mark Brown
2009-08-21 14:01 ` Pavel Machek
2009-08-22 14:16 ` Mark Brown
2009-08-22 19:35 ` Pavel Machek
2009-08-23 9:08 ` Mark Brown
2009-08-11 12:09 ` Question about userspace-consumer Mike Rapoport
2009-08-11 12:56 ` Mark Brown
2009-08-11 20:40 ` Felipe Balbi
2009-08-14 16:31 ` Pavel Machek
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