static int snvs_lpgpr_probe()

in snvs_lpgpr.c [88:134]

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

static int snvs_lpgpr_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct device_node *node = dev->of_node;
	struct device_node *syscon_node;
	struct snvs_lpgpr_priv *priv;
	struct nvmem_config *cfg;
	struct nvmem_device *nvmem;
	const struct snvs_lpgpr_cfg *dcfg;

	if (!node)
		return -ENOENT;

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

	dcfg = of_device_get_match_data(dev);
	if (!dcfg)
		return -EINVAL;

	syscon_node = of_get_parent(node);
	if (!syscon_node)
		return -ENODEV;

	priv->regmap = syscon_node_to_regmap(syscon_node);
	of_node_put(syscon_node);
	if (IS_ERR(priv->regmap))
		return PTR_ERR(priv->regmap);

	priv->dcfg = dcfg;

	cfg = &priv->cfg;
	cfg->priv = priv;
	cfg->name = dev_name(dev);
	cfg->dev = dev;
	cfg->stride = 4;
	cfg->word_size = 4;
	cfg->size = dcfg->size;
	cfg->owner = THIS_MODULE;
	cfg->reg_read  = snvs_lpgpr_read;
	cfg->reg_write = snvs_lpgpr_write;

	nvmem = devm_nvmem_register(dev, cfg);

	return PTR_ERR_OR_ZERO(nvmem);
}