From mboxrd@z Thu Jan  1 00:00:00 1970
From: Tabi Timur-B04825 <B04825@freescale.com>
Date: Sat, 30 Apr 2011 14:34:16 +0000
Subject: [U-Boot] [PATCH 2/9] mvgbe: Support preserving the existing MAC
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Mike Frysinger wrote:
> so implement this in your board file in misc_init_r or board_eth_init.  have
> the code do something like:
> 	uchar enetaddr[6];
> 	if (!eth_getenv_enetaddr("ethaddr", enetaddr)) {
> 		/* ... read current MAC out of the driver's registers ... */
> 		eth_setenv_enetaddr("ethaddr", enetaddr);
> 	}
>
> then you dont need ugly config hacks in random drivers

This is a feature that could be applied to the e1000 drivers.  The current situation is a mess.  Some drivers ignore the environment, some of them always use it.  This should probably be standardized.

-- 
Timur Tabi
Linux kernel developer at Freescale