static int imx_bus_probe()

in imx-bus.c [86:142]

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

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

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

	/*
	 * Fetch the clock to adjust but don't explicitly enable.
	 *
	 * For imx bus clock clk_set_rate is safe no matter if the clock is on
	 * or off and some peripheral side-buses might be off unless enabled by
	 * drivers for devices on those specific buses.
	 *
	 * Rate adjustment on a disabled bus clock just takes effect later.
	 */
	priv->clk = devm_clk_get(dev, NULL);
	if (IS_ERR(priv->clk)) {
		ret = PTR_ERR(priv->clk);
		dev_err(dev, "failed to fetch clk: %d\n", ret);
		return ret;
	}
	platform_set_drvdata(pdev, priv);

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

	priv->profile.target = imx_bus_target;
	priv->profile.exit = imx_bus_exit;
	priv->profile.get_cur_freq = imx_bus_get_cur_freq;
	priv->profile.initial_freq = clk_get_rate(priv->clk);

	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;
	}

	ret = imx_bus_init_icc(dev);
	if (ret)
		goto err;

	return 0;

err:
	dev_pm_opp_of_remove_table(dev);
	return ret;
}