diff options
| author | Jens Gehrlein <jens.gehrlein@tqs.de> | 2007-09-26 17:55:54 +0200 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2007-12-27 01:59:50 +0100 |
| commit | 22d1a56cbfb0bff34f477b4db6a55d076d829b83 (patch) | |
| tree | b8206a0016a00d0d13564b2ff22c080cadf9f762 /board | |
| parent | b988b8cd443989be65161888eea0127ad03f846f (diff) | |
| download | u-boot-imx-22d1a56cbfb0bff34f477b4db6a55d076d829b83.zip u-boot-imx-22d1a56cbfb0bff34f477b4db6a55d076d829b83.tar.gz u-boot-imx-22d1a56cbfb0bff34f477b4db6a55d076d829b83.tar.bz2 | |
TQM885D: Exchanged SDRAM timing by a more relaxed timing.
CAS-Latency=2, Write Recovery Time tWR=2
The max. supported bus frequency is 66 MHz. Therefore, changed
threshold to switch from 1:1 mode to 2:1 from 80 MHz to 66 MHz.
Signed-off-by: Martin Krause <martin.krause@tqs.de>
Diffstat (limited to 'board')
| -rw-r--r-- | board/tqm8xx/tqm8xx.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/board/tqm8xx/tqm8xx.c b/board/tqm8xx/tqm8xx.c index cebdcc0..06bf5f8 100644 --- a/board/tqm8xx/tqm8xx.c +++ b/board/tqm8xx/tqm8xx.c @@ -37,6 +37,7 @@ static long int dram_size (long int, long int *, long int); #define _NOT_USED_ 0xFFFFFFFF +/* UPM initialization table for SDRAM: 40, 50, 66 MHz CLKOUT @ CAS latency 2, tWR=2 */ const uint sdram_table[] = { /* @@ -63,14 +64,14 @@ const uint sdram_table[] = /* * Single Write. (Offset 18 in UPMA RAM) */ - 0x1F0DFC04, 0xEEABBC00, 0x01B27C04, 0x1FF5FC47, /* last */ - _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, + 0x1F0DFC04, 0xEEABBC00, 0x11B77C04, 0xEFFAFC44, + 0x1FF5FC47, /* last */ + _NOT_USED_, _NOT_USED_, _NOT_USED_, /* * Burst Write. (Offset 20 in UPMA RAM) */ 0x1F0DFC04, 0xEEABBC00, 0x10A77C00, 0xF0AFFC00, - 0xF0AFFC00, 0xE1BAFC04, 0x1FF5FC47, /* last */ - _NOT_USED_, + 0xF0AFFC00, 0xF0AFFC04, 0xE1BAFC44, 0x1FF5FC47, /* last */ _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, /* @@ -83,7 +84,7 @@ const uint sdram_table[] = /* * Exception. (Offset 3c in UPMA RAM) */ - 0x7FFFFC07, /* last */ + 0xFFFFFC07, /* last */ _NOT_USED_, _NOT_USED_, _NOT_USED_, }; |