The MSB of DMC1_MEM_CFG can be set to '1' for separate CKE control for S3C6400. In the configuration of SMDK6400, however, two 16-bit mDDR (SAMSUNG K4X51163) chips are used in parallel to form 32-bit memory bus and there is no need to contorl CKE for each chip separately. AFAIK, CKE1 is not at all connected. Only CKE0 is used. Futhermore, it should be '0' always for S3C6410. When tested with a board which has a S3C6410 and the same memory configuration, a side effect is obsearved that u-boot command "reset" doesn't work leading to system hang. Leaving the bit clear is safe in most cases.
Signed-off-by: Seunghyeon Rhee seunghyeon@lpmtec.com --- include/s3c6400.h | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/include/s3c6400.h b/include/s3c6400.h index e527c08..7229ea6 100644 --- a/include/s3c6400.h +++ b/include/s3c6400.h @@ -817,7 +817,7 @@ /*----------------------------------------------------------------------- * Physical Memory Map */ -#define DMC1_MEM_CFG 0x80010012 /* Chip1, Burst4, Row/Column bit */ +#define DMC1_MEM_CFG 0x00010012 /* Chip1, Burst4, Row/Column bit */ #define DMC1_MEM_CFG2 0xB45 #define DMC1_CHIP0_CFG 0x150F8 /* 0x4000_0000 ~ 0x43ff_ffff (64MB) */ #define DMC_DDR_32_CFG 0x0 /* 32bit, DDR */