linux-kernel - Re: Document sysfs interface to RTC system wakeup

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Message-ID: <20081209124320.GC1547@ucw.cz>
Date:	Tue, 9 Dec 2008 13:43:21 +0100
From:	Pavel Machek <pavel@...e.cz>
To:	mtk.manpages@...il.com
Cc:	Jonathan Corbet <corbet@....net>,
	kernel list <linux-kernel@...r.kernel.org>, dl9pf@....de,
	rdunlap@...otime.net, linux-doc@...r.kernel.org,
	Andrew Morton <akpm@...l.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: Document sysfs interface to RTC system wakeup


On Fri 2008-11-28 16:40:35, Michael Kerrisk wrote:
> On Wed, Nov 26, 2008 at 12:00 PM, Pavel Machek <pavel@...e.cz> wrote:
> >> On Wed, 26 Nov 2008 17:15:24 +0100
> >> Pavel Machek <pavel@...e.cz> wrote:
> >>
> >> > +How to use /sys/class/rtc/rtcX/wakealarm
> >> > +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> >> > +This file takes the seconds since epoch to enable a wake event at the
> >> > +specified time.
> >>
> >> More documentation is cool.  In this case, though, I'm left with an
> >> immediate question: *why* am I interested in wakealarm?  Reading
> >> through, I eventually figure out that it can maybe be used to get a
> >> system to start up at some point in the future, maybe.  It seems like
> >> that should be said at the outset.
> >
> > You can suspend/power down your machine, and it will power itself up
> > at appropriate time.
> >
> >> Also; why do I want to migrate from /proc/acpi/alarm?
> >
> > Because /proc/acpi/alarm is ugly hack that is going to go away :-).
> 
> And these are the statements that (in slightly more polished terms)
> should be in your doc ;-), in order to address Jonathan's quite
> reasonable questions.

I'm bad at polishing, but I'll add short explanation.

-- 
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