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ARM DaVinci: EMIF settings

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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>
master
Thomas Lange 15 years ago committed by Jean-Christophe PLAGNIOL-VILLARD
parent 2600b8571a
commit d583ef5147
1 changed files with 3 additions and 9 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 12
      drivers/mtd/nand/davinci_nand.c

12
drivers/mtd/nand/davinci_nand.c
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@ -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)

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