From 061aad4d320dddce26247699dcf2875ee2ea1366 Mon Sep 17 00:00:00 2001
From: Dave Liu <r63238@freescale.com>
Date: Thu, 10 Jan 2008 23:09:33 +0800
Subject: [PATCH] mpc83xx: Fix the bug of 266MHz data rate DDR
The DDR doesn't work on the 266MHz data rate,
the patch fix the bug.
Signed-off-by: Dave Liu <daveliu@freescale.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
---
cpu/mpc83xx/spd_sdram.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/cpu/mpc83xx/spd_sdram.c b/cpu/mpc83xx/spd_sdram.c
index 29dd47078ec..0acca477178 100644
--- a/cpu/mpc83xx/spd_sdram.c
+++ b/cpu/mpc83xx/spd_sdram.c
@@ -574,9 +574,9 @@ long int spd_sdram()
*/
cpo = 0;
if (spd.mem_type == SPD_MEMTYPE_DDR2) {
- if (effective_data_rate == 266 || effective_data_rate == 333) {
- cpo = 0x7; /* READ_LAT + 5/4 */
- } else if (effective_data_rate == 400) {
+ if (effective_data_rate == 266) {
+ cpo = 0x4; /* READ_LAT + 1/2 */
+ } else if (effective_data_rate == 333 || effective_data_rate == 400) {
cpo = 0x7; /* READ_LAT + 5/4 */
} else {
/* Automatic calibration */
--
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