From: David Brownell <david-b@pacbell.net>
Date: Fri, 13 Jun 2008 04:38:06 +0000 (-0700)
Subject: net/enc28j60: low power mode
X-Git-Tag: v2.6.26-rc7~20^2~3^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7dac6f8df607929e51f4fd598d80bd009c45a9f8;p=pandora-kernel.git

net/enc28j60: low power mode

Keep enc28j60 chips in low-power mode when they're not in use.
At typically 120 mA, these chips run hot even when idle; this
low power mode cuts that power usage by a factor of around 100.

This version provides a generic routine to poll a register until
its masked value equals some value ... e.g. bit set or cleared.
It's basically what the previous wait_phy_ready() did, but this
version is generalized to support the handshaking needed to
enter and exit low power mode.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Claudio Lanconelli <lanconelli.claudio@eptar.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
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