static int k3_r5_probe()

in ti_k3_r5_remoteproc.c [1456:1530]

• 59 lines of code
• 12 McCabe index (conditional complexity)

static int k3_r5_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct device_node *np = dev_of_node(dev);
	struct k3_r5_cluster *cluster;
	const struct k3_r5_soc_data *data;
	int ret;
	int num_cores;

	data = of_device_get_match_data(&pdev->dev);
	if (!data) {
		dev_err(dev, "SoC-specific data is not defined\n");
		return -ENODEV;
	}

	cluster = devm_kzalloc(dev, sizeof(*cluster), GFP_KERNEL);
	if (!cluster)
		return -ENOMEM;

	cluster->dev = dev;
	/*
	 * default to most common efuse configurations - Split-mode on AM64x
	 * and LockStep-mode on all others
	 */
	cluster->mode = data->single_cpu_mode ?
				CLUSTER_MODE_SPLIT : CLUSTER_MODE_LOCKSTEP;
	cluster->soc_data = data;
	INIT_LIST_HEAD(&cluster->cores);

	ret = of_property_read_u32(np, "ti,cluster-mode", &cluster->mode);
	if (ret < 0 && ret != -EINVAL) {
		dev_err(dev, "invalid format for ti,cluster-mode, ret = %d\n",
			ret);
		return ret;
	}

	num_cores = of_get_available_child_count(np);
	if (num_cores != 2) {
		dev_err(dev, "MCU cluster requires both R5F cores to be enabled, num_cores = %d\n",
			num_cores);
		return -ENODEV;
	}

	platform_set_drvdata(pdev, cluster);

	ret = devm_of_platform_populate(dev);
	if (ret) {
		dev_err(dev, "devm_of_platform_populate failed, ret = %d\n",
			ret);
		return ret;
	}

	ret = k3_r5_cluster_of_init(pdev);
	if (ret) {
		dev_err(dev, "k3_r5_cluster_of_init failed, ret = %d\n", ret);
		return ret;
	}

	ret = devm_add_action_or_reset(dev, k3_r5_cluster_of_exit, pdev);
	if (ret)
		return ret;

	ret = k3_r5_cluster_rproc_init(pdev);
	if (ret) {
		dev_err(dev, "k3_r5_cluster_rproc_init failed, ret = %d\n",
			ret);
		return ret;
	}

	ret = devm_add_action_or_reset(dev, k3_r5_cluster_rproc_exit, pdev);
	if (ret)
		return ret;

	return 0;
}