[U-Boot] [PATCH v3] Enabled support for Rev 1.3 SPD for DDR2 DIMMs

Kumar Gala galak at kernel.crashing.org
Fri May 7 17:16:36 CEST 2010


On May 7, 2010, at 9:12 AM, York Sun wrote:

> SPD has minor change from Rev 1.2 to 1.3. This patch enables Rev 1.3.
> The difference has ben examined and the code is compatible.
> Speed bins is not verified on hardware for CL7 at this moment.
> 
> This patch also enables SPD Rev 1.x where x is up to "F". According to SPD
> spec, the lower nibble is optionally used to determine which additinal bytes
> or attribute bits have been defined. Software can safely use defaults. However,
> the upper nibble should always be checked.
> 
> Signed-off-by: York Sun <yorksun at freescale.com>
> ---
> arch/powerpc/cpu/mpc8xxx/ddr/ddr2_dimm_params.c |    4 ++--
> common/ddr_spd.c                                |    6 +++++-
> 2 files changed, 7 insertions(+), 3 deletions(-)

Wolfgang,

I'm intended to pick this up for this release as we are having memories show up that dont work w/u-boot because of this issue on the revision check.

- k


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