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atmel_nand: don't require CONFIG_SYS_NAND_ENABLE_PIN

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If NCE is hooked up to NCS3, we don't need to (and can't)
explicitly set the state of the NCE pin. Instead, the
controller asserts it automatically as part of a
command/data access. Only "CE don't care"-type NAND chips
can be used in this manner.

Signed-off-by: Michael Trimarchi <michael@amarulasolutions.com>
Cc: Scott Wood <scottwood@freescale.com>
Cc: Reinhard Meyer <u-boot@emk-elektronik.de>
This commit is contained in:
michael 2011-03-14 21:16:38 +00:00 committed by Scott Wood
parent 0272c718ba
commit 67a490d60d
1 changed files with 2 additions and 0 deletions
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drivers/mtd/nand/atmel_nand.c
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@ -249,8 +249,10 @@ static void at91_nand_hwcontrol(struct mtd_info *mtd,
if (ctrl & NAND_ALE)
IO_ADDR_W |= CONFIG_SYS_NAND_MASK_ALE;
#ifdef CONFIG_SYS_NAND_ENABLE_PIN
at91_set_gpio_value(CONFIG_SYS_NAND_ENABLE_PIN,
!(ctrl & NAND_NCE));
#endif
this->IO_ADDR_W = (void *) IO_ADDR_W;
}