diff options
Diffstat (limited to 'drivers/pinctrl')
| -rw-r--r-- | drivers/pinctrl/pinctrl-at91.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/pinctrl/pinctrl-at91.c b/drivers/pinctrl/pinctrl-at91.c index 34fb0ae62a..021c1e5a2e 100644 --- a/drivers/pinctrl/pinctrl-at91.c +++ b/drivers/pinctrl/pinctrl-at91.c @@ -568,6 +568,21 @@ static int at91_gpio_direction_output(struct gpio_chip *chip, unsigned offset, return 0; } +static int at91_gpio_get_direction(struct gpio_chip *chip, unsigned offset) +{ + struct at91_gpio_chip *at91_gpio = to_at91_gpio_chip(chip); + void __iomem *pio = at91_gpio->regbase; + unsigned mask = 1 << offset; + u32 osr; + + if (mask & __raw_readl(pio + PIO_PSR)) { + osr = __raw_readl(pio + PIO_OSR); + return !(osr & mask); + } else { + return -EBUSY; + } +} + static int at91_gpio_direction_input(struct gpio_chip *chip, unsigned offset) { struct at91_gpio_chip *at91_gpio = to_at91_gpio_chip(chip); @@ -603,6 +618,7 @@ static struct gpio_ops at91_gpio_ops = { .free = at91_gpio_free, .direction_input = at91_gpio_direction_input, .direction_output = at91_gpio_direction_output, + .get_direction = at91_gpio_get_direction, .get = at91_gpio_get, .set = at91_gpio_set, }; |