On Tue, May 28, 2013 at 05:12:23PM +0800, Jingchang Lu wrote:

+&fec0 {
+	phy-mode = "rmii";
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_fec0_1>;
+	status = "okay";
+};

I'm wondering if fec works fine on your side.  The kernel seems to halt
on the repeated phy messages below here when I boot the kernel with NFS.

Shawn

fec 400d0000.ethernet eth0: Freescale FEC PHY driver [Generic PHY]
(mii_bus:phy_addr=400d0000.etherne:00, irq=-1)
IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
fec 400d1000.ethernet eth1: Freescale FEC PHY driver [Generic PHY]
(mii_bus:phy_addr=400d0000.etherne:01, irq=-1)
IPv6: ADDRCONF(NETDEV_UP): eth1: link is not ready
libphy: 400d0000.etherne:00 - Link is Up - 100/Full
IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
libphy: 400d0000.etherne:01 - Link is Up - 100/Full
IPv6: ADDRCONF(NETDEV_CHANGE): eth1: link becomes ready
Sending DHCP requests ., OK
IP-Config: Got DHCP answer from 192.168.1.1, my address is 192.168.1.102
IP-Config: Complete:
     device=eth0, hwaddr=00:04:9f:02:19:38, ipaddr=192.168.1.102,
mask=255.255.255.0, gw=192.168.1.1
     host=192.168.1.102, domain=domain, nis-domain=(none)
     bootserver=0.0.0.0, rootserver=192.168.1.100, rootpath=, mtu=576
     nameserver0=61.177.7.1, nameserver1=221.228.255.1
ALSA device list:
  No soundcards found.
libphy: 400d0000.etherne:00 - Link is Up - 100/Half
libphy: 400d0000.etherne:00 - Link is Up - 100/Full
libphy: 400d0000.etherne:00 - Link is Up - 100/Half
libphy: 400d0000.etherne:00 - Link is Up - 100/Full
libphy: 400d0000.etherne:00 - Link is Up - 100/Half
libphy: 400d0000.etherne:00 - Link is Up - 100/Full
libphy: 400d0000.etherne:00 - Link is Up - 100/Half
...