static int imx8m_ddrc_probe()

in imx8m-ddrc.c [366:438]

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

static int imx8m_ddrc_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct imx8m_ddrc *priv;
	const char *gov = DEVFREQ_GOV_USERSPACE;
	int ret;

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

	platform_set_drvdata(pdev, priv);

	ret = imx8m_ddrc_init_freq_info(dev);
	if (ret) {
		dev_err(dev, "failed to init firmware freq info: %d\n", ret);
		return ret;
	}

	priv->dram_core = devm_clk_get(dev, "core");
	if (IS_ERR(priv->dram_core)) {
		ret = PTR_ERR(priv->dram_core);
		dev_err(dev, "failed to fetch core clock: %d\n", ret);
		return ret;
	}
	priv->dram_pll = devm_clk_get(dev, "pll");
	if (IS_ERR(priv->dram_pll)) {
		ret = PTR_ERR(priv->dram_pll);
		dev_err(dev, "failed to fetch pll clock: %d\n", ret);
		return ret;
	}
	priv->dram_alt = devm_clk_get(dev, "alt");
	if (IS_ERR(priv->dram_alt)) {
		ret = PTR_ERR(priv->dram_alt);
		dev_err(dev, "failed to fetch alt clock: %d\n", ret);
		return ret;
	}
	priv->dram_apb = devm_clk_get(dev, "apb");
	if (IS_ERR(priv->dram_apb)) {
		ret = PTR_ERR(priv->dram_apb);
		dev_err(dev, "failed to fetch apb clock: %d\n", ret);
		return ret;
	}

	ret = dev_pm_opp_of_add_table(dev);
	if (ret < 0) {
		dev_err(dev, "failed to get OPP table\n");
		return ret;
	}

	ret = imx8m_ddrc_check_opps(dev);
	if (ret < 0)
		goto err;

	priv->profile.target = imx8m_ddrc_target;
	priv->profile.exit = imx8m_ddrc_exit;
	priv->profile.get_cur_freq = imx8m_ddrc_get_cur_freq;
	priv->profile.initial_freq = clk_get_rate(priv->dram_core);

	priv->devfreq = devm_devfreq_add_device(dev, &priv->profile,
						gov, NULL);
	if (IS_ERR(priv->devfreq)) {
		ret = PTR_ERR(priv->devfreq);
		dev_err(dev, "failed to add devfreq device: %d\n", ret);
		goto err;
	}

	return 0;

err:
	dev_pm_opp_of_remove_table(dev);
	return ret;
}