u-boot/doc/device-tree-bindings/net/fsl,mcf-fec.txt

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* Freescale ColdFire FEC ethernet controller
Required properties:
- compatible: should be "fsl,mcf-fec"
- reg: address and length of the register set for the device.
Optional properties:
- mii-base: index of FEC reg area, 0 for FEC0, 1 for FEC1
- max-speed: max speedm Mbits/sec
- phy-addr: phy address
- timeout-loop: integer value for driver loops time out
Example:
fec0: ethernet@fc030000 {
compatible = "fsl,mcf-fec";
reg = <0xfc030000 0x400>;
mii-base = <0>;
phy-addr = <0>;
timeout-loop = <5000>;
};