[U-Boot-Users] Yucca DDR2 setup

[Dale Dunlea]

On 7/24/07, Stefan Roese <sr at denx.de> wrote:
> Hi Dale,
>
> On Monday 23 July 2007, Dale Dunlea wrote:
> > I have 2 AMCC yucca boards, one Rev A silicon, and one Rev B silicon.
> >
> > "ERROR: Cannot determine a common read delay for the DIMM(s) installed."
> >
> > This happens on both the Rev A board, and the Rev B board. Oddly
> > enough, on our own custom board which is very similar to the Yucca, it
> > passes fine.
> >
> > Has anyone ever seen this before?
>
> Not exactly as you described. It is know though, that Yucca Rev A boards were
> having problems with the current common SPD DDR2 memory detection code. But
> just recently I fixed this Rev A issue in the u-boot-ppc4xx repository:
>
> http://www.denx.de/cgi-bin/gitweb.cgi?p=u-boot/u-boot-ppc4xx.git;a=commit;h=df3f17422aeb03fb81a7ac8c78d2b05d05aa4cf9
>
> So please download the current u-boot-ppc4xx repository and give it a try. And
> please let me know if it works on your Yucca's (Rev A and B) and your custom
> board.

Ah. When I tried the git head, I was pulling from the main u-boot
repository, The 4xx branch does indeed fix my problem. It works on
both the A and the B board. I can't comment on our custom board as it
is currently on tour.

On a related note, I get machine check exceptions when I insert a PCIe
card into the Rev A board. I have a work-around, but it's a bit messy,
so I'll email you off-list about it.

Regards,
Dale