static int exynos_ppmu_probe()

in event/exynos-ppmu.c [648:697]

• 40 lines of code
• 7 McCabe index (conditional complexity)

static int exynos_ppmu_probe(struct platform_device *pdev)
{
	struct exynos_ppmu *info;
	struct devfreq_event_dev **edev;
	struct devfreq_event_desc *desc;
	int i, ret = 0, size;

	info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
	if (!info)
		return -ENOMEM;

	info->dev = &pdev->dev;

	/* Parse dt data to get resource */
	ret = exynos_ppmu_parse_dt(pdev, info);
	if (ret < 0) {
		dev_err(&pdev->dev,
			"failed to parse devicetree for resource\n");
		return ret;
	}
	desc = info->desc;

	size = sizeof(struct devfreq_event_dev *) * info->num_events;
	info->edev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
	if (!info->edev)
		return -ENOMEM;

	edev = info->edev;
	platform_set_drvdata(pdev, info);

	for (i = 0; i < info->num_events; i++) {
		edev[i] = devm_devfreq_event_add_edev(&pdev->dev, &desc[i]);
		if (IS_ERR(edev[i])) {
			dev_err(&pdev->dev,
				"failed to add devfreq-event device\n");
			return PTR_ERR(edev[i]);
		}

		pr_info("exynos-ppmu: new PPMU device registered %s (%s)\n",
			dev_name(&pdev->dev), desc[i].name);
	}

	ret = clk_prepare_enable(info->ppmu.clk);
	if (ret) {
		dev_err(&pdev->dev, "failed to prepare ppmu clock\n");
		return ret;
	}

	return 0;
}