From: John Crispin <[email protected]> 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 <[email protected]> Signed-off-by: Martin Schiller <[email protected]> --- Changes in v4: - Added commit message + comment Changes in v3: - Moved this change into a separate patch Changes in v2: None drivers/pinctrl/pinctrl-xway.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/drivers/pinctrl/pinctrl-xway.c b/drivers/pinctrl/pinctrl-xway.c index b78baaa..66f0048 100644 --- a/drivers/pinctrl/pinctrl-xway.c +++ b/drivers/pinctrl/pinctrl-xway.c @@ -1573,6 +1573,22 @@ 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->dev); + 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, @@ -1581,6 +1597,7 @@ 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, }; -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
