From 8e64d6efd8d778a5f83d8bff9cd273a86dcc182f Mon Sep 17 00:00:00 2001 From: Heiko Schocher Date: Wed, 31 Mar 2010 08:34:51 +0200 Subject: net, doc: How to setup MAC address correctly As this seems unclear, document how the flow of setting up the MAC address is correct. Signed-off-by: Heiko Schocher Text changed slightly, adding input from Mike Frysinger. Signed-off-by: Wolfgang Denk --- doc/README.enetaddr | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/doc/README.enetaddr b/doc/README.enetaddr index 1d75aa3876..94d800a02a 100644 --- a/doc/README.enetaddr +++ b/doc/README.enetaddr @@ -28,6 +28,17 @@ Here are the places where MAC addresses might be stored: purpose of passing this information to an OS kernel we are about to boot +Correct flow of setting up the MAC address (summarized): + +1. Read from hardware in initialize() function +2. Read from environment in net/eth.c after initialize() +3. Give priority to the value in the environment if a conflict +4. Program hardware in the device's init() function. + +If somebody wants to subvert the design philosophy, this can be done +in the board-specific board_eth_init() function by calling eth_init() +after all the NICs have been registered. + ------- Usage ------- -- cgit v1.2.3