static int tegra124_cpufreq_probe()

in tegra124-cpufreq.c [54:130]

• 62 lines of code
• 10 McCabe index (conditional complexity)

static int tegra124_cpufreq_probe(struct platform_device *pdev)
{
	struct tegra124_cpufreq_priv *priv;
	struct device_node *np;
	struct device *cpu_dev;
	struct platform_device_info cpufreq_dt_devinfo = {};
	int ret;

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

	cpu_dev = get_cpu_device(0);
	if (!cpu_dev)
		return -ENODEV;

	np = of_cpu_device_node_get(0);
	if (!np)
		return -ENODEV;

	priv->cpu_clk = of_clk_get_by_name(np, "cpu_g");
	if (IS_ERR(priv->cpu_clk)) {
		ret = PTR_ERR(priv->cpu_clk);
		goto out_put_np;
	}

	priv->dfll_clk = of_clk_get_by_name(np, "dfll");
	if (IS_ERR(priv->dfll_clk)) {
		ret = PTR_ERR(priv->dfll_clk);
		goto out_put_cpu_clk;
	}

	priv->pllx_clk = of_clk_get_by_name(np, "pll_x");
	if (IS_ERR(priv->pllx_clk)) {
		ret = PTR_ERR(priv->pllx_clk);
		goto out_put_dfll_clk;
	}

	priv->pllp_clk = of_clk_get_by_name(np, "pll_p");
	if (IS_ERR(priv->pllp_clk)) {
		ret = PTR_ERR(priv->pllp_clk);
		goto out_put_pllx_clk;
	}

	ret = tegra124_cpu_switch_to_dfll(priv);
	if (ret)
		goto out_put_pllp_clk;

	cpufreq_dt_devinfo.name = "cpufreq-dt";
	cpufreq_dt_devinfo.parent = &pdev->dev;

	priv->cpufreq_dt_pdev =
		platform_device_register_full(&cpufreq_dt_devinfo);
	if (IS_ERR(priv->cpufreq_dt_pdev)) {
		ret = PTR_ERR(priv->cpufreq_dt_pdev);
		goto out_put_pllp_clk;
	}

	platform_set_drvdata(pdev, priv);

	of_node_put(np);

	return 0;

out_put_pllp_clk:
	clk_put(priv->pllp_clk);
out_put_pllx_clk:
	clk_put(priv->pllx_clk);
out_put_dfll_clk:
	clk_put(priv->dfll_clk);
out_put_cpu_clk:
	clk_put(priv->cpu_clk);
out_put_np:
	of_node_put(np);

	return ret;
}