[U-Boot] How do ARM platform initialize DDR?

Timur Tabi
2013-09-22T13:02:44Z

On Thu, Sep 19, 2013 at 3:57 PM, Tom Rini <trini@ti.com> wrote:
>
> Thinking back, as a rule of thumb, PowerPC has SPD I2C data
> available, usually. That's not the rule for ARM. One of a few choices
> happen:

Even if you do have SPD on your ARM chip, that's still no guarantee
that you can program the DDR controller properly. On our chips, we
have to have a table of 300+ for each frequency that we support, and
the SPD only lets us tweak a few registers to account for different
size DIMMs.