diff --git a/doc/README.fec_mxc b/doc/README.fec_mxc
index 72a1d59..30e05da 100644
--- a/doc/README.fec_mxc
+++ b/doc/README.fec_mxc
@@ -1,7 +1,8 @@
 U-boot config options used in fec_mxc.c
 
 CONFIG_FEC_MXC
-	Selects fec_mxc.c to be compiled into u-boot.
+	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.
@@ -25,3 +26,9 @@ CONFIG_FEC_MXC_NO_ANEG
 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.
diff --git a/doc/README.imx5 b/doc/README.imx5
index c5312b6..ea0e144 100644
--- a/doc/README.imx5
+++ b/doc/README.imx5
@@ -26,3 +26,15 @@ i.MX5x SoCs.
 
 2.1 MAC Address: It is stored in the words 9 to 14 of fuse bank 1, using the
     natural MAC byte order (i.e. MSB first).
+
+    This is an example how to program an example MAC address 01:23:45:67:89:ab
+    into the eFuses. Assure that the programming voltage is available and then
+    execute:
+
+    => fuse prog -y 1 9 01 23 45 67 89 ab
+
+    After programming a MAC address, consider locking the MAC fuses. This is
+    done by programming the MAC_ADDR_LOCK fuse, which is bit 4 of word 0 in
+    bank 1:
+
+    => fuse prog -y 1 0 10