mtd: lpc32xx_slc: Make wp gpio optional
This patch supports missing wp gpio.
Signed-off-by: Alexandre Pereira da Silva <aletes.xgr@gmail.com>
Signed-off-by: Roland Stigge <stigge@antcom.de>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
diff --git a/drivers/mtd/nand/lpc32xx_slc.c b/drivers/mtd/nand/lpc32xx_slc.c
index 1d837b9..1577a9b 100644
--- a/drivers/mtd/nand/lpc32xx_slc.c
+++ b/drivers/mtd/nand/lpc32xx_slc.c
@@ -192,7 +192,7 @@
uint32_t rhold;
uint32_t rsetup;
bool use_bbt;
- unsigned wp_gpio;
+ int wp_gpio;
struct mtd_partition *parts;
unsigned num_parts;
};
@@ -295,7 +295,8 @@
*/
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_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 @@
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;
}