atmel_nand: don't require CONFIG_SYS_NAND_ENABLE_PIN

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>

diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c
index ab8bbb3aea1139639a6c9b11dba57297f44364c0..818d3624a7eb6134c9fba8b5decaaeea1f8edfe9 100644 (file)
--- a/drivers/mtd/nand/atmel_nand.c
+++ b/drivers/mtd/nand/atmel_nand.c
@@ -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;
        }