static int xlnx_pr_decoupler_probe()

in xilinx-pr-decoupler.c [105:160]

• 44 lines of code
• 9 McCabe index (conditional complexity)

static int xlnx_pr_decoupler_probe(struct platform_device *pdev)
{
	struct device_node *np = pdev->dev.of_node;
	struct xlnx_pr_decoupler_data *priv;
	struct fpga_bridge *br;
	int err;
	struct resource *res;

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

	if (np) {
		const struct of_device_id *match;

		match = of_match_node(xlnx_pr_decoupler_of_match, np);
		if (match && match->data)
			priv->ipconfig = match->data;
	}

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	priv->io_base = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(priv->io_base))
		return PTR_ERR(priv->io_base);

	priv->clk = devm_clk_get(&pdev->dev, "aclk");
	if (IS_ERR(priv->clk))
		return dev_err_probe(&pdev->dev, PTR_ERR(priv->clk),
				     "input clock not found\n");

	err = clk_prepare_enable(priv->clk);
	if (err) {
		dev_err(&pdev->dev, "unable to enable clock\n");
		return err;
	}

	clk_disable(priv->clk);

	br = fpga_bridge_register(&pdev->dev, priv->ipconfig->name,
				  &xlnx_pr_decoupler_br_ops, priv);
	if (IS_ERR(br)) {
		err = PTR_ERR(br);
		dev_err(&pdev->dev, "unable to register %s",
			priv->ipconfig->name);
		goto err_clk;
	}

	platform_set_drvdata(pdev, br);

	return 0;

err_clk:
	clk_unprepare(priv->clk);

	return err;
}