From: Shawn Guo Date: Wed, 5 Jan 2011 21:13:13 +0000 (+0000) Subject: net/fec: add dual fec support for mx28 X-Git-Tag: v2.6.38-rc1~403^2~58 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b5680e0b591f2701c5ba7d5fc8f96b55414073c8;p=pandora-kernel.git net/fec: add dual fec support for mx28 This patch is to add mx28 dual fec support. Here are some key notes for mx28 fec controller. - The mx28 fec controller naming ENET-MAC is a different IP from FEC used on other i.mx variants. But they are basically compatible on software interface, so it's possible to share the same driver. - ENET-MAC design on mx28 made an improper assumption that it runs on a big-endian system. As the result, driver has to swap every frame going to and coming from the controller. - The external phys can only be configured by fec0, which means fec1 can not work independently and both phys need to be configured by mii_bus attached on fec0. - ENET-MAC reset will get mac address registers reset too. - ENET-MAC MII/RMII mode and 10M/100M speed are configured differently FEC. - ETHER_EN bit must be set to get ENET-MAC interrupt work. Signed-off-by: Shawn Guo Signed-off-by: David S. Miller --- Reading git-diff-tree failed