From bcb6c2bb84705bfd73eed5c9a31e9ff24833ee8c Mon Sep 17 00:00:00 2001 From: York Sun Date: Fri, 7 May 2010 09:12:01 -0500 Subject: Enabled support for Rev 1.3 SPD for DDR2 DIMMs 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 Signed-off-by: Kumar Gala --- common/ddr_spd.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'common/ddr_spd.c') diff --git a/common/ddr_spd.c b/common/ddr_spd.c index c058e4f18a3..a7a30de22bb 100644 --- a/common/ddr_spd.c +++ b/common/ddr_spd.c @@ -20,11 +20,15 @@ spd_check(const u8 *buf, u8 spd_rev, u8 spd_cksum) * Check SPD revision supported * Rev 1.2 or less supported by this code */ - if (spd_rev > 0x12) { + if (spd_rev >= 0x20) { printf("SPD revision %02X not supported by this code\n", spd_rev); return 1; } + if (spd_rev > 0x13) { + printf("SPD revision %02X not verified by this code\n", + spd_rev); + } /* * Calculate checksum -- cgit v1.2.3