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atmel_nand: check gpio validity before using it 

else we get : "invalid GPIO -22"
(as enable_pin is EINVAL)

tested on SAMA5D35

Signed-off-by: Eric Bénard <eric@eukrea.com>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Eric Bénard 2013-12-07 10:36:54 +01:00 committed by Sascha Hauer
parent a4dfb8d910
commit 50b02080c9
1 changed files with 2 additions and 2 deletions
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4
drivers/mtd/nand/atmel_nand.c
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@ -107,7 +107,7 @@ static struct nand_ecclayout atmel_pmecc_oobinfo;
*/
static void atmel_nand_enable(struct atmel_nand_host *host)
{
if (host->board->enable_pin)
if (gpio_is_valid(host->board->enable_pin))
gpio_set_value(host->board->enable_pin, 0);
}
@ -116,7 +116,7 @@ static void atmel_nand_enable(struct atmel_nand_host *host)
*/
static void atmel_nand_disable(struct atmel_nand_host *host)
{
if (host->board->enable_pin)
if (gpio_is_valid(host->board->enable_pin))
gpio_set_value(host->board->enable_pin, 1);
}