On Wed, Feb 8, 2012 at 3:44 AM, Hatim Ali <hatim...@samsung.com> wrote: > SMDK5250 development boards have different memory variants like > DDR3, LPDDR2 and LPDDR3. This patch adds supports for DDR3. > The DDR3 is configured for 667Mhz and is being enabled by default.
One other note: the SDRAM doesn't appear to be stable with the current CL as is. Specifically, I ran this test: Load two copies of vmlinuz: Hit any key to stop autoboot: 0 SMDK5250 # mmc rescan 0 SMDK5250 # fatload mmc 0:c 0x42000000 vmlinuz reading vmlinuz 3272888 bytes read SMDK5250 # fatload mmc 0:c 0x40008000 vmlinuz reading vmlinuz 3272888 bytes read Now compare them: SMDK5250 # cmp.l 0x40008000 0x42000000 3272888 word at 0x400097fc (0xe3160024) != word at 0x420017fc (0xe3160020) Total of 1535 words were the same ...but if you look at that memory, it's the same! SMDK5250 # md.l 0x420017fc 1 420017fc: e3160020 ... SMDK5250 # md.l 0x400097fc 1 400097fc: e3160020 ... ...in this case, re-running the cmp.l still showed the difference (?) Running RAM at 400MHz didn't show the same problem. NOTE: that doesn't prove the the problem is related to SDRAM stability, but it sure looks suspicious. -Doug _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot