static int rzg2l_usbphy_ctrl_probe()

in reset-rzg2l-usbphy-ctrl.c [103:155]

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

static int rzg2l_usbphy_ctrl_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct rzg2l_usbphy_ctrl_priv *priv;
	unsigned long flags;
	int error;
	u32 val;

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

	priv->base = devm_platform_ioremap_resource(pdev, 0);
	if (IS_ERR(priv->base))
		return PTR_ERR(priv->base);

	priv->rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL);
	if (IS_ERR(priv->rstc))
		return dev_err_probe(dev, PTR_ERR(priv->rstc),
				     "failed to get reset\n");

	reset_control_deassert(priv->rstc);

	priv->rcdev.ops = &rzg2l_usbphy_ctrl_reset_ops;
	priv->rcdev.of_reset_n_cells = 1;
	priv->rcdev.nr_resets = NUM_PORTS;
	priv->rcdev.of_node = dev->of_node;
	priv->rcdev.dev = dev;

	error = devm_reset_controller_register(dev, &priv->rcdev);
	if (error)
		return error;

	spin_lock_init(&priv->lock);
	dev_set_drvdata(dev, priv);

	pm_runtime_enable(&pdev->dev);
	error = pm_runtime_resume_and_get(&pdev->dev);
	if (error < 0) {
		pm_runtime_disable(&pdev->dev);
		reset_control_assert(priv->rstc);
		return dev_err_probe(&pdev->dev, error, "pm_runtime_resume_and_get failed");
	}

	/* put pll and phy into reset state */
	spin_lock_irqsave(&priv->lock, flags);
	val = readl(priv->base + RESET);
	val |= RESET_SEL_PLLRESET | RESET_PLLRESET | PHY_RESET_PORT2 | PHY_RESET_PORT1;
	writel(val, priv->base + RESET);
	spin_unlock_irqrestore(&priv->lock, flags);

	return 0;
}