[U-Boot] [PATCH v7 00/15] SiFive FU540 Support

[Auer, Lukas]

On Wed, 2019-02-13 at 10:35 +0100, Andreas Schwab wrote:
> On Feb 13 2019, Anup Patel <anup at brainfault.org> wrote:
> 
> > General practice (atlease what I have seen on few boards), is that
> > board
> > will have unique MAC address printed/labelled for each Ethernet
> > port. We
> > can just set-and-save "ethaddr" U-Boot env variable based on MAC
> > address
> > printed on board.
> > 
> > Unfortunately, I was not able to find printed MAC address on
> > Unleashed board.
> 
> It is derived from the serial number.
> 

Here is the relevant code from the FSBL [1]. The serial number is
stored in OTP memory.
There's also a U-Boot driver available [2], but I haven't tested or
looked at it in detail.

[1]: 
https://github.com/sifive/freedom-u540-c000-bootloader/blob/master/fsbl/main.c#L377
[2]: 
https://github.com/tmagik/HiFive_U-Boot/commit/6d842765de142b61f847852da7a9ce0d081d770c

Thanks,
Lukas