| * MDIO IO device | 
 |  | 
 | The MDIO is a bus to which the PHY devices are connected.  For each | 
 | device that exists on this bus, a child node should be created.  See | 
 | the definition of the PHY node in booting-without-of.txt for an example | 
 | of how to define a PHY. | 
 |  | 
 | Required properties: | 
 |   - reg : Offset and length of the register set for the device | 
 |   - compatible : Should define the compatible device type for the | 
 |     mdio.  Currently, this is most likely to be "fsl,gianfar-mdio" | 
 |  | 
 | Example: | 
 |  | 
 | 	mdio@24520 { | 
 | 		reg = <24520 20>; | 
 | 		compatible = "fsl,gianfar-mdio"; | 
 |  | 
 | 		ethernet-phy@0 { | 
 | 			...... | 
 | 		}; | 
 | 	}; | 
 |  | 
 | * TBI Internal MDIO bus | 
 |  | 
 | As of this writing, every tsec is associated with an internal TBI PHY. | 
 | This PHY is accessed through the local MDIO bus.  These buses are defined | 
 | similarly to the mdio buses, except they are compatible with "fsl,gianfar-tbi". | 
 | The TBI PHYs underneath them are similar to normal PHYs, but the reg property | 
 | is considered instructive, rather than descriptive.  The reg property should | 
 | be chosen so it doesn't interfere with other PHYs on the bus. | 
 |  | 
 | * Gianfar-compatible ethernet nodes | 
 |  | 
 | Properties: | 
 |  | 
 |   - device_type : Should be "network" | 
 |   - model : Model of the device.  Can be "TSEC", "eTSEC", or "FEC" | 
 |   - compatible : Should be "gianfar" | 
 |   - reg : Offset and length of the register set for the device | 
 |   - local-mac-address : List of bytes representing the ethernet address of | 
 |     this controller | 
 |   - interrupts : For FEC devices, the first interrupt is the device's | 
 |     interrupt.  For TSEC and eTSEC devices, the first interrupt is | 
 |     transmit, the second is receive, and the third is error. | 
 |   - phy-handle : The phandle for the PHY connected to this ethernet | 
 |     controller. | 
 |   - fixed-link : <a b c d e> where a is emulated phy id - choose any, | 
 |     but unique to the all specified fixed-links, b is duplex - 0 half, | 
 |     1 full, c is link speed - d#10/d#100/d#1000, d is pause - 0 no | 
 |     pause, 1 pause, e is asym_pause - 0 no asym_pause, 1 asym_pause. | 
 |   - phy-connection-type : a string naming the controller/PHY interface type, | 
 |     i.e., "mii" (default), "rmii", "gmii", "rgmii", "rgmii-id", "sgmii", | 
 |     "tbi", or "rtbi".  This property is only really needed if the connection | 
 |     is of type "rgmii-id", as all other connection types are detected by | 
 |     hardware. | 
 |   - fsl,magic-packet : If present, indicates that the hardware supports | 
 |     waking up via magic packet. | 
 |   - bd-stash : If present, indicates that the hardware supports stashing | 
 |     buffer descriptors in the L2. | 
 |   - rx-stash-len : Denotes the number of bytes of a received buffer to stash | 
 |     in the L2. | 
 |   - rx-stash-idx : Denotes the index of the first byte from the received | 
 |     buffer to stash in the L2. | 
 |  | 
 | Example: | 
 | 	ethernet@24000 { | 
 | 		device_type = "network"; | 
 | 		model = "TSEC"; | 
 | 		compatible = "gianfar"; | 
 | 		reg = <0x24000 0x1000>; | 
 | 		local-mac-address = [ 00 E0 0C 00 73 00 ]; | 
 | 		interrupts = <29 2 30 2 34 2>; | 
 | 		interrupt-parent = <&mpic>; | 
 | 		phy-handle = <&phy0> | 
 | 	}; |