static int uniphier_reset_probe()

in reset-uniphier.c [344:382]

• 33 lines of code
• 5 McCabe index (conditional complexity)

static int uniphier_reset_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct uniphier_reset_priv *priv;
	const struct uniphier_reset_data *p, *data;
	struct regmap *regmap;
	struct device_node *parent;
	unsigned int nr_resets = 0;

	data = of_device_get_match_data(dev);
	if (WARN_ON(!data))
		return -EINVAL;

	parent = of_get_parent(dev->of_node); /* parent should be syscon node */
	regmap = syscon_node_to_regmap(parent);
	of_node_put(parent);
	if (IS_ERR(regmap)) {
		dev_err(dev, "failed to get regmap (error %ld)\n",
			PTR_ERR(regmap));
		return PTR_ERR(regmap);
	}

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

	for (p = data; p->id != UNIPHIER_RESET_ID_END; p++)
		nr_resets = max(nr_resets, p->id + 1);

	priv->rcdev.ops = &uniphier_reset_ops;
	priv->rcdev.owner = dev->driver->owner;
	priv->rcdev.of_node = dev->of_node;
	priv->rcdev.nr_resets = nr_resets;
	priv->dev = dev;
	priv->regmap = regmap;
	priv->data = data;

	return devm_reset_controller_register(&pdev->dev, &priv->rcdev);
}