static int rockchip_dfi_probe()

in event/rockchip-dfi.c [176:226]

• 41 lines of code
• 8 McCabe index (conditional complexity)

static int rockchip_dfi_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct rockchip_dfi *data;
	struct devfreq_event_desc *desc;
	struct device_node *np = pdev->dev.of_node, *node;

	data = devm_kzalloc(dev, sizeof(struct rockchip_dfi), GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	data->regs = devm_platform_ioremap_resource(pdev, 0);
	if (IS_ERR(data->regs))
		return PTR_ERR(data->regs);

	data->clk = devm_clk_get(dev, "pclk_ddr_mon");
	if (IS_ERR(data->clk)) {
		dev_err(dev, "Cannot get the clk dmc_clk\n");
		return PTR_ERR(data->clk);
	}

	/* try to find the optional reference to the pmu syscon */
	node = of_parse_phandle(np, "rockchip,pmu", 0);
	if (node) {
		data->regmap_pmu = syscon_node_to_regmap(node);
		of_node_put(node);
		if (IS_ERR(data->regmap_pmu))
			return PTR_ERR(data->regmap_pmu);
	}
	data->dev = dev;

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

	desc->ops = &rockchip_dfi_ops;
	desc->driver_data = data;
	desc->name = np->name;
	data->desc = desc;

	data->edev = devm_devfreq_event_add_edev(&pdev->dev, desc);
	if (IS_ERR(data->edev)) {
		dev_err(&pdev->dev,
			"failed to add devfreq-event device\n");
		return PTR_ERR(data->edev);
	}

	platform_set_drvdata(pdev, data);

	return 0;
}