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-rw-r--r--doc/README.fec_mxc5
1 files changed, 5 insertions, 0 deletions
diff --git a/doc/README.fec_mxc b/doc/README.fec_mxc
index ed7e47d728..9ca6ac2fb5 100644
--- a/doc/README.fec_mxc
+++ b/doc/README.fec_mxc
@@ -27,6 +27,11 @@ 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