u-boot/doc/README.fec_mxc
Tom Rini 21491883d2 fec_mxc: Remove CONFIG_FEC_FIXED_SPEED support
This option is only used on one platform currently. However, with PHYLIB
enabled, which this platform also does, this option is not checked and
the functional use case is handled. Remove this code.

Signed-off-by: Tom Rini <trini@konsulko.com>
2022-12-22 10:31:47 -05:00

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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_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.
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.