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  • U-Boot config options used in fec_mxc.c
    
    
    CONFIG_FEC_MXC
    
    	Selects fec_mxc.c to be compiled into u-boot. Can read out the
    	ethaddr from the SoC eFuses (see below).
    
    
    CONFIG_MII
    	Must be defined if CONFIG_FEC_MXC is defined.
    
    CONFIG_FEC_XCV_TYPE
    	Defaults to MII100 for 100 Base-tx.
    	RGMII selects 1000 Base-tx reduced pin count interface.
    	RMII selects 100 Base-tx reduced pin count interface.
    
    CONFIG_FEC_MXC_SWAP_PACKET
    	Forced on iff MX28.
    	Swaps the bytes order of all words(4 byte units) in the packet.
    	This should not be specified by a board file. It is cpu specific.
    
    CONFIG_PHYLIB
    	fec_mxc supports PHYLIB and should be used for new boards.
    
    CONFIG_FEC_MXC_NO_ANEG
    	Relevant only if PHYLIB not used. Skips auto-negotiation restart.
    
    CONFIG_FEC_MXC_PHYADDR
    	Optional, selects the exact phy address that should be connected
    	and function fecmxc_initialize will try to initialize it.
    
    CONFIG_FEC_FIXED_SPEED
    	Optional, selects a fixed speed on the MAC interface without asking some
    	phy. This is usefull if there is a direct MAC <-> MAC connection, for
    	example if the CPU is connected directly via the RGMII interface to a
    	ethernet-switch.
    
    
    Reading the ethaddr from the SoC eFuses:
    if CONFIG_FEC_MXC is defined and the U-Boot environment does not contain the
    ethaddr variable, then its value gets read from the corresponding eFuses in
    the SoC. See the README files of the specific SoC for details.