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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>
This commit is contained in:
Alexandre Pereira da Silva 2012-06-27 17:51:13 +02:00 committed by David Woodhouse
parent 1c7b874d33
commit df63fe7657
1 changed files with 7 additions and 4 deletions
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11
drivers/mtd/nand/lpc32xx_slc.c
View File

@ -192,7 +192,7 @@ struct lpc32xx_nand_cfg_slc {
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 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;
}