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

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Message-ID: <20081126095610.13195e15@bike.lwn.net>
Date:	Wed, 26 Nov 2008 09:56:10 -0700
From:	Jonathan Corbet <corbet@....net>
To:	Pavel Machek <pavel@...e.cz>
Cc:	kernel list <linux-kernel@...r.kernel.org>, mtk.manpages@...il.com,
	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 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.

Also; why do I want to migrate from /proc/acpi/alarm?

jon
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