arm-cci.c

		return -ENOMEM;

	ret = of_address_to_resource(np, 0, &res);
	if (!ret) {
		cci_ctrl_base = ioremap(res.start, resource_size(&res));
		cci_ctrl_phys =	res.start;
	}
	if (ret || !cci_ctrl_base) {
		WARN(1, "unable to ioremap CCI ctrl\n");
		ret = -ENXIO;
		goto memalloc_err;
	}

	for_each_child_of_node(np, cp) {
		if (!of_match_node(arm_cci_ctrl_if_matches, cp))
			continue;

		i = nb_ace + nb_ace_lite;

		if (i >= nb_cci_ports)
			break;

		if (of_property_read_string(cp, "interface-type",
					&match_str)) {
			WARN(1, "node %s missing interface-type property\n",
				  cp->full_name);
			continue;
		}
		is_ace = strcmp(match_str, "ace") == 0;
		if (!is_ace && strcmp(match_str, "ace-lite")) {
			WARN(1, "node %s containing invalid interface-type property, skipping it\n",
					cp->full_name);
			continue;
		}

		ret = of_address_to_resource(cp, 0, &res);
		if (!ret) {
			ports[i].base = ioremap(res.start, resource_size(&res));
			ports[i].phys = res.start;
		}
		if (ret || !ports[i].base) {
			WARN(1, "unable to ioremap CCI port %d\n", i);
			continue;
		}

		if (is_ace) {
			if (WARN_ON(nb_ace >= cci_config->nb_ace))
				continue;
			ports[i].type = ACE_PORT;
			++nb_ace;
		} else {
			if (WARN_ON(nb_ace_lite >= cci_config->nb_ace_lite))
				continue;
			ports[i].type = ACE_LITE_PORT;
			++nb_ace_lite;
		}
		ports[i].dn = cp;
	}

	 /* initialize a stashed array of ACE ports to speed-up look-up */
	cci_ace_init_ports();

	/*
	 * Multi-cluster systems may need this data when non-coherent, during
	 * cluster power-up/power-down. Make sure it reaches main memory.
	 */
	sync_cache_w(&cci_ctrl_base);
	sync_cache_w(&cci_ctrl_phys);
	sync_cache_w(&ports);
	sync_cache_w(&cpu_port);
	__sync_cache_range_w(ports, sizeof(*ports) * nb_cci_ports);
	pr_info("ARM CCI driver probed\n");
	return 0;

memalloc_err:

	kfree(ports);
	return ret;
}

static int cci_init_status = -EAGAIN;
static DEFINE_MUTEX(cci_probing);

static int cci_init(void)
{
	if (cci_init_status != -EAGAIN)
		return cci_init_status;

	mutex_lock(&cci_probing);
	if (cci_init_status == -EAGAIN)
		cci_init_status = cci_probe();
	mutex_unlock(&cci_probing);
	return cci_init_status;
}

#ifdef CONFIG_HW_PERF_EVENTS
static struct platform_driver cci_pmu_driver = {
	.driver = {
		   .name = DRIVER_NAME_PMU,
		   .of_match_table = arm_cci_pmu_matches,
		  },
	.probe = cci_pmu_probe,
};

static struct platform_driver cci_platform_driver = {
	.driver = {
		   .name = DRIVER_NAME,
		   .of_match_table = arm_cci_matches,
		  },
	.probe = cci_platform_probe,
};

static int __init cci_platform_init(void)
{
	int ret;

	ret = platform_driver_register(&cci_pmu_driver);
	if (ret)
		return ret;

	return platform_driver_register(&cci_platform_driver);
}

#else

static int __init cci_platform_init(void)
{
	return 0;
}

#endif
/*
 * To sort out early init calls ordering a helper function is provided to
 * check if the CCI driver has beed initialized. Function check if the driver
 * has been initialized, if not it calls the init function that probes
 * the driver and updates the return value.
 */
bool cci_probed(void)
{
	return cci_init() == 0;
}
EXPORT_SYMBOL_GPL(cci_probed);

early_initcall(cci_init);
core_initcall(cci_platform_init);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("ARM CCI support");