diff options
| author | John Crispin <blogic@openwrt.org> | 2015-12-04 10:05:44 (GMT) |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2015-12-10 23:05:19 (GMT) |
| commit | 3e640743fee6e6a82ead1f163737755b2a965712 (patch) | |
| tree | 14b2fa69fadf2ccb5ac2fb9cb064023add7dfefe /drivers/pinctrl | |
| parent | b4818afeacbd81821f89a89951471cffcb6a65e0 (diff) | |
| download | linux-3e640743fee6e6a82ead1f163737755b2a965712.tar.xz | |
pinctrl: lantiq: Implement gpio_chip.to_irq
Some drivers require a way to translate GPIO pins to their IRQ numbers.
This patch adds the .to_irq() gpiolib callback to the pinctrl-xway
driver, which returns an IRQ mapping for a given GPIO pin.
Signed-off-by: John Crispin <blogic@openwrt.org>
Signed-off-by: Martin Schiller <mschiller@tdt.de>
[Switched ->dev to ->parent]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl')
| -rw-r--r-- | drivers/pinctrl/pinctrl-xway.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/pinctrl/pinctrl-xway.c b/drivers/pinctrl/pinctrl-xway.c index b4380fb..e56222e 100644 --- a/drivers/pinctrl/pinctrl-xway.c +++ b/drivers/pinctrl/pinctrl-xway.c @@ -682,6 +682,22 @@ static int xway_gpio_dir_out(struct gpio_chip *chip, unsigned int pin, int val) return 0; } +/* + * gpiolib gpiod_to_irq callback function. + * Returns the mapped IRQ (external interrupt) number for a given GPIO pin. + */ +static int xway_gpio_to_irq(struct gpio_chip *chip, unsigned offset) +{ + struct ltq_pinmux_info *info = dev_get_drvdata(chip->parent); + int i; + + for (i = 0; i < info->num_exin; i++) + if (info->exin[i] == offset) + return ltq_eiu_get_irq(i); + + return -1; +} + static struct gpio_chip xway_chip = { .label = "gpio-xway", .direction_input = xway_gpio_dir_in, @@ -690,6 +706,7 @@ static struct gpio_chip xway_chip = { .set = xway_gpio_set, .request = gpiochip_generic_request, .free = gpiochip_generic_free, + .to_irq = xway_gpio_to_irq, .base = -1, }; |