1 SMSC LAN91c111 Ethernet mac
4 - compatible = "smsc,lan91c111";
5 - reg : physical address and size of registers
6 - interrupts : interrupt connection
9 - phy-device : phandle to Ethernet phy
10 - local-mac-address : Ethernet mac address to use
11 - reg-io-width : Mask of sizes (in bytes) of the IO accesses that
12 are supported on the device. Valid value for SMSC LAN91c111 are
13 1, 2 or 4. If it's omitted or invalid, the size would be 2 meaning