static int tusb320_extcon_probe()

in extcon-usbc-tusb320.c [233:306]

• 55 lines of code
• 10 McCabe index (conditional complexity)

static int tusb320_extcon_probe(struct i2c_client *client,
				const struct i2c_device_id *id)
{
	struct tusb320_priv *priv;
	const void *match_data;
	unsigned int revision;
	int ret;

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

	priv->regmap = devm_regmap_init_i2c(client, &tusb320_regmap_config);
	if (IS_ERR(priv->regmap))
		return PTR_ERR(priv->regmap);

	ret = tusb320_check_signature(priv);
	if (ret)
		return ret;

	match_data = device_get_match_data(&client->dev);
	if (!match_data)
		return -EINVAL;

	priv->ops = (struct tusb320_ops*)match_data;

	priv->edev = devm_extcon_dev_allocate(priv->dev, tusb320_extcon_cable);
	if (IS_ERR(priv->edev)) {
		dev_err(priv->dev, "failed to allocate extcon device\n");
		return PTR_ERR(priv->edev);
	}

	if (priv->ops->get_revision) {
		ret = priv->ops->get_revision(priv, &revision);
		if (ret)
			dev_warn(priv->dev,
				"failed to read revision register: %d\n", ret);
		else
			dev_info(priv->dev, "chip revision %d\n", revision);
	}

	ret = devm_extcon_dev_register(priv->dev, priv->edev);
	if (ret < 0) {
		dev_err(priv->dev, "failed to register extcon device\n");
		return ret;
	}

	extcon_set_property_capability(priv->edev, EXTCON_USB,
				       EXTCON_PROP_USB_TYPEC_POLARITY);
	extcon_set_property_capability(priv->edev, EXTCON_USB_HOST,
				       EXTCON_PROP_USB_TYPEC_POLARITY);

	/* update initial state */
	tusb320_irq_handler(client->irq, priv);

	/* Reset chip to its default state */
	ret = tusb320_reset(priv);
	if (ret)
		dev_warn(priv->dev, "failed to reset chip: %d\n", ret);
	else
		/*
		 * State and polarity might change after a reset, so update
		 * them again and make sure the interrupt status bit is cleared.
		 */
		tusb320_irq_handler(client->irq, priv);

	ret = devm_request_threaded_irq(priv->dev, client->irq, NULL,
					tusb320_irq_handler,
					IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
					client->name, priv);

	return ret;
}