static int exynos_ppmu_parse_dt()

in event/exynos-ppmu.c [605:646]

• 35 lines of code
• 6 McCabe index (conditional complexity)

static int exynos_ppmu_parse_dt(struct platform_device *pdev,
				struct exynos_ppmu *info)
{
	struct device *dev = info->dev;
	struct device_node *np = dev->of_node;
	struct resource *res;
	void __iomem *base;
	int ret = 0;

	if (!np) {
		dev_err(dev, "failed to find devicetree node\n");
		return -EINVAL;
	}

	/* Maps the memory mapped IO to control PPMU register */
	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	base = devm_ioremap_resource(dev, res);
	if (IS_ERR(base))
		return PTR_ERR(base);

	exynos_ppmu_regmap_config.max_register = resource_size(res) - 4;
	info->regmap = devm_regmap_init_mmio(dev, base,
					&exynos_ppmu_regmap_config);
	if (IS_ERR(info->regmap)) {
		dev_err(dev, "failed to initialize regmap\n");
		return PTR_ERR(info->regmap);
	}

	info->ppmu.clk = devm_clk_get(dev, "ppmu");
	if (IS_ERR(info->ppmu.clk)) {
		info->ppmu.clk = NULL;
		dev_warn(dev, "cannot get PPMU clock\n");
	}

	ret = of_get_devfreq_events(np, info);
	if (ret < 0) {
		dev_err(dev, "failed to parse exynos ppmu dt node\n");
		return ret;
	}

	return 0;
}