[U-Boot] [PATCH 3/3] smc911x: do net reset the chip if no EEPROM is connected

[Mike Frysinger]

On Monday 27 April 2009 10:44:16 Daniel Mack wrote:
> On Sun, Apr 26, 2009 at 11:14:06PM -0400, Mike Frysinger wrote:
> > On Tuesday 21 April 2009 07:13:10 Daniel Mack wrote:
> > > On Wed, Apr 08, 2009 at 11:57:37PM -0400, Mike Frysinger wrote:
> > > > > Not if the MAC is stored in the volatile smc911x registers. Issuing
> > > > > a soft reset flushes these values - if U-Boot does that, the OS has
> > > > > no change getting them.
> > > >
> > > > then either your u-boot or your OS is misconfigured and you need to
> > > > fix that. as clearly stated in docs/README.enetaddr, the environment
> > > > is the place where mac addresses live when there is no dedicated
> > > > storage (like an eeprom).
> > > >
> > > > ignoring that, the mac address doesnt magically get programmed.  if
> > > > no network operation was initiated, then the part wouldnt have been
> > > > programmed anyways, so you're still left with an OS that cant get
> > > > itself functional.
> > >
> > > Ok, true. Thanks for pointing this out.
> >
> > usually what i suggest to people are things like:
> >  - pass $(ethaddr) via kernel command line and parse /proc/cmdline
> >  - use the u-boot tools to read the u-boot env directly
> >  - set the hw address with `ifconfig` or similar tool
>
> ... which doesn't help much when it's about booting from NFS root.

it works fine if you use an initramfs like everyone suggests
-mike
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