[U-Boot] [PATCH v5 08/12] SPEAr : Support for HW mac id read/write from i2c mem

[Mike Frysinger <vapier@gentoo.org>]

On Monday 18 January 2010 01:15:43 Ben Warren wrote:
> Vipin KUMAR wrote:
> > This patch adds the  support to read and write mac id from i2c
> > memory.
> > For reading:
> > 	if (env contains ethaddr)
> > 		pick env ethaddr
> > 	else
> > 		pick ethaddr from i2c memory
> > For writing:
> > 	chip_config ethaddr XX:XX:XX:XX:XX:XX writes the mac id
> > 	in i2c memory
> >
> > --- a/board/spear/common/spr_misc.c
> > +++ b/board/spear/common/spr_misc.c
> > @@ -67,6 +67,12 @@ int dram_init(void)
> >
> >  int misc_init_r(void)
> >  {
> > +#if defined(CONFIG_CMD_NET)
> > +	uchar mac_id[6];
> > +
> > +	if (!eth_getenv_enetaddr("ethaddr", mac_id) && !i2c_read_mac(mac_id))
> > +		eth_setenv_enetaddr("ethaddr", mac_id);
> 
> It's really not a good idea to programatically set an environment
> variable like this.  Also, there's already a well-defined and documented
> protocol for  how MAC addresses should be read and the precedence
> between EEPROM storage and environment storage.  Please find a way to
> fit into that model.  Since you don't have network support yet, I have
> no idea which network controller you're using, and recommend waiting
> until this is really needed.

he's doing it the way doc/README.enetaddr suggests ...
-mike
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