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| author |   Richard Genoud <richard.genoud@gmail.com> | 2014-02-17 17:57:26 +0100 |
|---|---|---|
| committer |   Linus Walleij <linus.walleij@linaro.org> | 2014-02-25 10:49:15 +0100 |
| commit | 8af584b8683640fef9deb317e166a0aa0ebae151 (patch) | |
| tree | d9438b7592c74bab20f4777614df3213241e3aac /drivers/pinctrl/pinctrl-at91.c | |
| parent | ARM: shmobile: r8a7791 dtsi: Fix typo in msiof2 clock output name (diff) | |
| download | linux-dev-8af584b8683640fef9deb317e166a0aa0ebae151.tar.xz linux-dev-8af584b8683640fef9deb317e166a0aa0ebae151.zip | |
pinctrl: at91: implement get_direction
This is needed for gpiod_get_direction().
Otherwise, it returns -EINVAL.
Signed-off-by: Richard Genoud <richard.genoud@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/pinctrl-at91.c')
| -rw-r--r-- | drivers/pinctrl/pinctrl-at91.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/pinctrl/pinctrl-at91.c b/drivers/pinctrl/pinctrl-at91.c index 71247f47fcec..5d24aaec5dbc 100644 --- a/drivers/pinctrl/pinctrl-at91.c +++ b/drivers/pinctrl/pinctrl-at91.c @@ -1137,6 +1137,17 @@ static void at91_gpio_free(struct gpio_chip *chip, unsigned offset) pinctrl_free_gpio(gpio); } +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; + + osr = readl_relaxed(pio + PIO_OSR); + return !(osr & mask); +} + static int at91_gpio_direction_input(struct gpio_chip *chip, unsigned offset) { struct at91_gpio_chip *at91_gpio = to_at91_gpio_chip(chip); @@ -1570,6 +1581,7 @@ static int at91_gpio_of_irq_setup(struct device_node *node, static struct gpio_chip at91_gpio_template = { .request = at91_gpio_request, .free = at91_gpio_free, + .get_direction = at91_gpio_get_direction, .direction_input = at91_gpio_direction_input, .get = at91_gpio_get, .direction_output = at91_gpio_direction_output, |