doc: describe the analysis of crash dumps

[oweals/u-boot.git] / doc / README.fec_mxc

diff --git a/doc/README.fec_mxc b/doc/README.fec_mxc
index ed7e47d728581a3691654b5b7e6f20cad3fa96fb..9ca6ac2fb59d13253af6fdd742e3b36a508d0a39 100644 (file)
--- 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