ARM DaVinci: EMIF settings
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>
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 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 @@
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)