Today, I went to my local PC store, and bought EVERY type of DDR2 SODIMM memory they had, Kingston, Crucial, PC4200, PC5300 four different kinds of memory, and NONE of them will boot with U-boot now.
Hay Russell,
I don't have patches, and I haven't worked on this in a long time because we have a single build option for our RAM. However, I may have a pointer for you to look at if you haven't already. Way back when we we're thinking about having SPD support I did spend some time digging through spd_sdram.c and found that some of the calculations were....I won't say broken, but not exactly acurate because of they way they were done. I also found that the highest data rate speeds supported didn't go high enough to support all of the speeds DDR2 can have. Like I said, it's been a long time and someone may have already fixed it, but it had to do with calculating max_data_rate, effective_data_rate, and caslat in spd_sdram(). It was something I ment to fix and then never did because we didn't end up using it. Hope this helps. If not, sorry for the noise.
Bruce