NAND module should not modify EMIF registers unrelated to CS2 that is used for NAND, i.e. do not modify EWAIT config register or registers for other Chip Selects.
Without this patch, EMIF configurations made in board_init() will be invalidated.
Signed-off-by: Thomas Lange thomas@corelatus.se --- drivers/mtd/nand/davinci_nand.c | 12 +++--------- 1 files changed, 3 insertions(+), 9 deletions(-)
diff --git a/drivers/mtd/nand/davinci_nand.c b/drivers/mtd/nand/davinci_nand.c index a974667..8ef18b8 100644 --- a/drivers/mtd/nand/davinci_nand.c +++ b/drivers/mtd/nand/davinci_nand.c @@ -386,9 +386,6 @@ static int nand_davinci_waitfunc(struct mtd_info *mtd, struct nand_chip *this) static void nand_flash_init(void) { u_int32_t acfg1 = 0x3ffffffc; - u_int32_t acfg2 = 0x3ffffffc; - u_int32_t acfg3 = 0x3ffffffc; - u_int32_t acfg4 = 0x3ffffffc; emifregs emif_regs;
/*------------------------------------------------------------------* @@ -413,12 +410,9 @@ static void nand_flash_init(void)
emif_regs = (emifregs)DAVINCI_ASYNC_EMIF_CNTRL_BASE;
- emif_regs->AWCCR |= 0x10000000; - emif_regs->AB1CR = acfg1; /* 0x08244128 */; - emif_regs->AB2CR = acfg2; - emif_regs->AB3CR = acfg3; - emif_regs->AB4CR = acfg4; - emif_regs->NANDFCR = 0x00000101; + emif_regs->AB1CR = acfg1; /* CS2 */ + + emif_regs->NANDFCR = 0x00000101; /* NAND flash on CS2 */ }
int board_nand_init(struct nand_chip *nand)