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Date: Sat, 27 Oct 2007 23:50:25 +0400 From: Anton Vorontsov <cbou@...l.ru> To: David Woodhouse <dwmw2@...radead.org> Cc: Andrey Borzenkov <arvidjaar@...l.ru>, linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org, davidz@...hat.com, rhughes@...hat.com Subject: Re: [PATCH] 2.6.24-rc1: ensure "present" sysfs attribute even if battery is absent 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@...l.ru backup email: ya-cbou@...dex.ru irc://irc.freenode.net/bd2 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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