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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>
This commit is contained in:
John Crispin 2015-12-04 11:05:44 +01:00 committed by Linus Walleij
parent b4818afeac
commit 3e640743fe
1 changed files with 17 additions and 0 deletions
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17
drivers/pinctrl/pinctrl-xway.c
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@ -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,
};