From 3e640743fee6e6a82ead1f163737755b2a965712 Mon Sep 17 00:00:00 2001 From: John Crispin Date: Fri, 4 Dec 2015 11:05:44 +0100 Subject: [PATCH] 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 Signed-off-by: Martin Schiller [Switched ->dev to ->parent] Signed-off-by: Linus Walleij --- 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 b4380fb72001..e56222eac96c 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, }; -- 2.20.1