Revert "Revert "pinctrl: lantiq: Implement gpio_chip.to_irq""

	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,

	.set = xway_gpio_set,

	.request = gpiochip_generic_request,

	.free = gpiochip_generic_free,

	.to_irq = xway_gpio_to_irq,

	.base = -1,

};