[PATCH] at91_nand: control NCE signal

[Atsushi Nemoto]

This driver did not control NCE signal during normal operations (only
enable NCE on probing and disable NCE on removing).  This patch make
NCE signal inactive on idle state.

Signed-off-by: Atsushi Nemoto <anemo at mba.ocn.ne.jp>
---
 drivers/mtd/nand/at91_nand.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/drivers/mtd/nand/at91_nand.c b/drivers/mtd/nand/at91_nand.c
index c9fb2ac..c96812f 100644
--- a/drivers/mtd/nand/at91_nand.c
+++ b/drivers/mtd/nand/at91_nand.c
@@ -44,6 +44,12 @@ static void at91_nand_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
 	struct nand_chip *nand_chip = mtd->priv;
 	struct at91_nand_host *host = nand_chip->priv;
 
+	if (host->board->enable_pin && (ctrl & NAND_CTRL_CHANGE)) {
+		if (ctrl & NAND_NCE)
+			at91_set_gpio_value(host->board->enable_pin, 0);
+		else
+			at91_set_gpio_value(host->board->enable_pin, 1);
+	}
 	if (cmd == NAND_CMD_NONE)
 		return;