Function mtk_gpio_attach

freebsd/mips/mediatek/mtk_gpio_v1.c:257–334

}

static int
mtk_gpio_attach(device_t dev)
{
	struct mtk_gpio_softc *sc;
	phandle_t node;
	uint32_t i, num_pins;

	sc = device_get_softc(dev);
	sc->dev = dev;

	if (bus_alloc_resources(dev, mtk_gpio_spec, sc->res)) {
		device_printf(dev, "could not allocate resources for device\n");
		return (ENXIO);
	}

	MTK_GPIO_LOCK_INIT(sc);

	node = ofw_bus_get_node(dev);

	if (OF_hasprop(node, "clocks"))
		mtk_soc_start_clock(dev);
	if (OF_hasprop(node, "resets"))
		mtk_soc_reset_device(dev);

	if (OF_getprop(node, "ralink,register-map", sc->regs,
	    GPIO_PIOMAX) <= 0) {
		device_printf(dev, "Failed to read register map\n");
		return (ENXIO);
	}

	if (OF_hasprop(node, "ralink,num-gpios") && (OF_getencprop(node,
	    "ralink,num-gpios", &num_pins, sizeof(num_pins)) >= 0))
		sc->num_pins = num_pins;
	else
		sc->num_pins = MTK_GPIO_PINS;

	for (i = 0; i < sc->num_pins; i++) {
		sc->pins[i].pin_caps |= GPIO_PIN_INPUT | GPIO_PIN_OUTPUT |
		    GPIO_PIN_INVIN | GPIO_PIN_INVOUT |
		    GPIO_INTR_EDGE_RISING | GPIO_INTR_EDGE_FALLING;
		sc->pins[i].intr_polarity = INTR_POLARITY_HIGH;
		sc->pins[i].intr_trigger = INTR_TRIGGER_EDGE;

		snprintf(sc->pins[i].pin_name, GPIOMAXNAME - 1, "gpio%c%d",
		    device_get_unit(dev) + 'a', i);
		sc->pins[i].pin_name[GPIOMAXNAME - 1] = '\0';

		mtk_gpio_pin_probe(sc, i);
	}

	if (mtk_pic_register_isrcs(sc) != 0) {
		device_printf(dev, "could not register PIC ISRCs\n");
		goto fail;
	}

	if (intr_pic_register(dev, OF_xref_from_node(node)) == NULL) {
		device_printf(dev, "could not register PIC\n");
		goto fail;