Function mv_gpio_setup_intrhandler

freebsd/arm/mv/gpio.c:408–447

}

int
mv_gpio_setup_intrhandler(device_t dev, const char *name, driver_filter_t *filt,
    void (*hand)(void *), void *arg, int pin, int flags, void **cookiep)
{
	struct	intr_event *event;
	int	error;
	struct mv_gpio_pindev *s;
	struct mv_gpio_softc *sc;
	sc = (struct mv_gpio_softc *)device_get_softc(dev);
	s = malloc(sizeof(struct mv_gpio_pindev), M_DEVBUF, M_NOWAIT | M_ZERO);

	if (pin < 0 || pin >= sc->pin_num)
		return (ENXIO);
	event = sc->gpio_events[pin];
	if (event == NULL) {
		MV_GPIO_LOCK();
		if (sc->gpio_setup[pin].gp_flags & MV_GPIO_IN_DEBOUNCE) {
			error = mv_gpio_debounce_init(dev, pin);
			if (error != 0) {
				MV_GPIO_UNLOCK();
				return (error);
			}
		} else if (sc->gpio_setup[pin].gp_flags & MV_GPIO_IN_IRQ_DOUBLE_EDGE)
			mv_gpio_double_edge_init(dev, pin);
		MV_GPIO_UNLOCK();
		error = intr_event_create(&event, (void *)s, 0, pin,
		    (void (*)(void *))mv_gpio_intr_mask,
		    (void (*)(void *))mv_gpio_intr_unmask,
		    (void (*)(void *))mv_gpio_int_ack,
		    NULL,
		    "gpio%d:", pin);
		if (error != 0)
			return (error);
		sc->gpio_events[pin] = event;
	}

	intr_event_add_handler(event, name, filt, hand, arg,
	    intr_priority(flags), flags, cookiep);
	return (0);
}

static void
mv_gpio_intr_mask(struct mv_gpio_pindev *s)