Subject: Re: Update on Android PM enhancements - CONFIG_HAS_EARLYSUSPEND
 and friends
From: Johannes Berg <johannes@sipsolutions.net>
To: Arve =?ISO-8859-1?Q?Hj=F8nnev=E5g?= <arve@android.com>
Cc: "Luis R. Rodriguez" <mcgrof@gmail.com>,
	linux-kernel@vger.kernel.org, "Rafael J. Wysocki" <rjw@sisk.pl>,
	devel@linuxdriverproject.org, Naveen Singh <nsingh@atheros.com>,
	Kalle Valo <kvalo@adurom.com>,
	Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Jouni Malinen <Jouni.Malinen@atheros.com>,
	Vipin Mehta <vmehta@atheros.com>,
	linux-wireless <linux-wireless@vger.kernel.org>
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Date: Thu, 24 Mar 2011 10:06:30 +0100
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On Thu, 2011-03-24 at 10:04 +0100, Johannes Berg wrote:
> On Wed, 2011-03-23 at 17:47 -0700, Arve Hjønnevåg wrote:
> 
> > There is no planned replacement for early suspend, and it will
> > probably be dropped form the android kernel at some point. The wifi
> > driver use it to enter a lower operating state when the screen is off.
> > If you driver does have any other way to put the driver in this state
> > you need to add an interface that lets user-space select that state
> > directly.
> 
> The interface is called "ip link set wlan0 down".

Or, in fact, just powersaving mode. But I don't think for a wifi driver
there's any need for special driver specific states.

johannes