linux-kernel - Re: Generic events for wake up from S1-S4

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Message-ID: <20090714235332.GA1552@ucw.cz>
Date:	Wed, 15 Jul 2009 01:53:33 +0200
From:	Pavel Machek <pavel@....cz>
To:	"Luis R. Rodriguez" <mcgrof@...il.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	linux-kernel@...r.kernel.org,
	Johannes Berg <johannes@...solutions.net>,
	"John W. Linville" <linville@...driver.com>,
	Jouni Malinen <j@...fi>,
	linux-wireless <linux-wireless@...r.kernel.org>,
	Stephen Chen <Stephen.Chen@...eros.com>
Subject: Re: Generic events for wake up from S1-S4

On Tue 2009-07-14 15:11:45, Luis R. Rodriguez wrote:
> I'm working on Wake-on-Wireless support for wireless right now [1].
> Upon wake up I wanted to inform the kernel of the event which caused
> the wake up but am not clear if there is a generic API for this. Mind
> you, for WoW we'll need at least some AC power to the card so we'll
> need to at least be in S3-Hot so we'll only need events for that for
> now.
> 
> Do we have some generic infrastructure to gather reasons for wake up
> from S1-S4 and pass this to userspace yet?

I do not think generic api exists...

How does it work? I thought that wifi stack is in software -> you need
main cpu to run for wifi to work?

...and what are the applications? I understand that WoL is useful for
remote administration of connected desktops.
								Pavel

> [1] http://wireless.kernel.org/en/users/Documentation/WoW


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