* "smii"
* "xgmii"
* "trgmii"
+ * "2000base-x",
+ * "2500base-x",
+ * "rxaui"
- phy-connection-type: the same as "phy-mode" property but described in ePAPR;
- phy-handle: phandle, specifies a reference to a node representing a PHY
device; this property is described in ePAPR and so preferred;