[U-Boot-Users] [PATCH 8/8] mpc83xx: Fix the bug of 266MHz data rate DDR

Dave Liu r63238 at freescale.com
Thu Jan 10 16:09:33 CET 2008


The DDR doesn't work on the 266MHz data rate,
the patch fix the bug.

Signed-off-by: Dave Liu <daveliu at freescale.com>
---
 cpu/mpc83xx/spd_sdram.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/cpu/mpc83xx/spd_sdram.c b/cpu/mpc83xx/spd_sdram.c
index 29dd470..0acca47 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 */
-- 
1.5.3.5.643.g40e25







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