Function mv_timer_attach

freebsd/arm/mv/timer.c:182–268

}

static int
mv_timer_attach(device_t dev)
{
	int	error;
	void	*ihl;
	struct	mv_timer_softc *sc;
	uint32_t irq_cause, irq_mask;

	if (timer_softc != NULL)
		return (ENXIO);

	sc = (struct mv_timer_softc *)device_get_softc(dev);
	timer_softc = sc;

	sc->config = (struct mv_timer_config*)
	    ofw_bus_search_compatible(dev, mv_timer_soc_config)->ocd_data;

	if (sc->config->clock_src == 0)
		sc->config->clock_src = get_tclk();

	error = bus_alloc_resources(dev, mv_timer_spec, sc->timer_res);
	if (error) {
		device_printf(dev, "could not allocate resources\n");
		return (ENXIO);
	}

	sc->timer_bst = rman_get_bustag(sc->timer_res[0]);
	sc->timer_bsh = rman_get_bushandle(sc->timer_res[0]);

	sc->has_wdt = ofw_bus_has_prop(dev, "mrvl,has-wdt");

	mtx_init(&timer_softc->timer_mtx, "watchdog", NULL, MTX_DEF);

	if (sc->has_wdt) {
		if (sc->config->watchdog_disable)
			sc->config->watchdog_disable();
		EVENTHANDLER_REGISTER(watchdog_list, mv_watchdog_event, sc, 0);
	}

	if (ofw_bus_search_compatible(dev, mv_timer_compat)->ocd_data
	    == MV_WDT) {
		/* Don't set timers for wdt-only entry. */
		device_printf(dev, "only watchdog attached\n");
		return (0);
	} else if (sc->timer_res[1] == NULL) {
		device_printf(dev, "no interrupt resource\n");
		bus_release_resources(dev, mv_timer_spec, sc->timer_res);
		return (ENXIO);
	}

	if (bus_setup_intr(dev, sc->timer_res[1], INTR_TYPE_CLK,
	    mv_hardclock, NULL, sc, &ihl) != 0) {
		bus_release_resources(dev, mv_timer_spec, sc->timer_res);
		device_printf(dev, "Could not setup interrupt.\n");
		return (ENXIO);
	}

	mv_setup_timers();