@@ -192,7 +192,7 @@ struct lpc32xx_nand_cfg_slc {
u32 rhold;
u32 rsetup;
bool use_bbt;
- unsigned wp_gpio;
+ int wp_gpio;
struct mtd_partition *parts;
unsigned num_parts;
};
@@ -295,7 +295,8 @@ static int lpc32xx_nand_device_ready(struct mtd_info *mtd)
*/
static void lpc32xx_wp_enable(struct lpc32xx_nand_host *host)
{
- gpio_set_value(host->ncfg->wp_gpio, 0);
+ if (gpio_is_valid(host->ncfg->wp_gpio))
+ gpio_set_value(host->ncfg->wp_gpio, 0);
}
/*
@@ -303,7 +304,8 @@ static void lpc32xx_wp_enable(struct lpc32xx_nand_host *host)
*/
static void lpc32xx_wp_disable(struct lpc32xx_nand_host *host)
{
- gpio_set_value(host->ncfg->wp_gpio, 1);
+ if (gpio_is_valid(host->ncfg->wp_gpio))
+ gpio_set_value(host->ncfg->wp_gpio, 1);
}
/*
@@ -819,7 +821,8 @@ static int __devinit lpc32xx_nand_probe(struct platform_device *pdev)
dev_err(&pdev->dev, "Missing platform data\n");
return -ENOENT;
}
- if (gpio_request(host->ncfg->wp_gpio, "NAND WP")) {
+ if (gpio_is_valid(host->ncfg->wp_gpio) &&
+ gpio_request(host->ncfg->wp_gpio, "NAND WP")) {
dev_err(&pdev->dev, "GPIO not available\n");
return -EBUSY;
}