From: Anton Vorontsov <cbou@mail.ru>
To: David Woodhouse <dwmw2@infradead.org>
Cc: Andrey Borzenkov <arvidjaar@mail.ru>,
linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org,
davidz@redhat.com, rhughes@redhat.com
Subject: Re: [PATCH] 2.6.24-rc1: ensure "present" sysfs attribute even if battery is absent
Date: Sat, 27 Oct 2007 23:50:25 +0400 [thread overview]
Message-ID: <20071027195025.GA3263@zarina> (raw)
In-Reply-To: <1193513524.2915.18.camel@shinybook.infradead.org>
On Sat, Oct 27, 2007 at 03:32:04PM -0400, David Woodhouse wrote:
> On Sat, 2007-10-27 at 22:42 +0400, Anton Vorontsov wrote:
> > Well, PROP_PRESENT wasn't my idea, currently it's used by pmu and
> > olpc drivers becuase it's not trivial to register/unregister their
> > batteries on physical insertion/removal. I have some plans to teach
> > at least pmu batteries to not use PROP_PRESENT. I don't have any
> > OLPC, thus I can't convert it.
>
> Actually it's not hard to do that.
I didn't say it's hard. But we don't have any interrupts for the
battery events, thus we have to implement polling.
> It was done this way in response to a
> request from the userspace side. IIRC.
Oh. Userspace tried to do something weird then, I think. Generally
it's just sane to unregister absent hardware.
--
Anton Vorontsov
email: cbou@mail.ru
backup email: ya-cbou@yandex.ru
irc://irc.freenode.net/bd2
next prev parent reply other threads:[~2007-10-27 19:52 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-27 16:54 [PATCH] 2.6.24-rc1: ensure "present" sysfs attribute even if battery is absent Andrey Borzenkov
2007-10-27 17:16 ` Alexey Starikovskiy
2007-10-27 17:50 ` Andrey Borzenkov
2007-10-27 18:18 ` Alexey Starikovskiy
2007-10-27 18:42 ` Anton Vorontsov
2007-10-27 19:32 ` David Woodhouse
2007-10-27 19:50 ` Anton Vorontsov [this message]
2007-10-28 6:50 ` Andrey Borzenkov
2007-10-28 7:37 ` [PATCH] [2.6.24-rc] ACPI: register power_supply subdevice only when battery is present Andrey Borzenkov
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