static int tsens_probe()

in qcom/tsens.c [1089:1161]

• 60 lines of code
• 15 McCabe index (conditional complexity)

static int tsens_probe(struct platform_device *pdev)
{
	int ret, i;
	struct device *dev;
	struct device_node *np;
	struct tsens_priv *priv;
	const struct tsens_plat_data *data;
	const struct of_device_id *id;
	u32 num_sensors;

	if (pdev->dev.of_node)
		dev = &pdev->dev;
	else
		dev = pdev->dev.parent;

	np = dev->of_node;

	id = of_match_node(tsens_table, np);
	if (id)
		data = id->data;
	else
		data = &data_8960;

	num_sensors = data->num_sensors;

	if (np)
		of_property_read_u32(np, "#qcom,sensors", &num_sensors);

	if (num_sensors <= 0) {
		dev_err(dev, "%s: invalid number of sensors\n", __func__);
		return -EINVAL;
	}

	priv = devm_kzalloc(dev,
			     struct_size(priv, sensor, num_sensors),
			     GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	priv->dev = dev;
	priv->num_sensors = num_sensors;
	priv->ops = data->ops;
	for (i = 0;  i < priv->num_sensors; i++) {
		if (data->hw_ids)
			priv->sensor[i].hw_id = data->hw_ids[i];
		else
			priv->sensor[i].hw_id = i;
	}
	priv->feat = data->feat;
	priv->fields = data->fields;

	platform_set_drvdata(pdev, priv);

	if (!priv->ops || !priv->ops->init || !priv->ops->get_temp)
		return -EINVAL;

	ret = priv->ops->init(priv);
	if (ret < 0) {
		dev_err(dev, "%s: init failed\n", __func__);
		return ret;
	}

	if (priv->ops->calibrate) {
		ret = priv->ops->calibrate(priv);
		if (ret < 0) {
			if (ret != -EPROBE_DEFER)
				dev_err(dev, "%s: calibration failed\n", __func__);
			return ret;
		}
	}

	return tsens_register(priv);
}