Hi,

On Fri, Jan 06, 2017 at 10:26:33AM -0600, Rob Herring wrote:
> [...]
>
> +static int serdev_device_match(struct device *dev, struct device_driver *drv)
> +{
> +	return of_driver_match_device(dev, drv);
> +}

Maybe add a TODO note here for ACPI/platform support?

> [...]
>
> +int serdev_device_open(struct serdev_device *serdev)
> +{
> +	struct serdev_controller *ctrl = serdev->ctrl;
> +
> +	if (!ctrl || !ctrl->ops->open)
> +		return 0;
> +
> +	return serdev->ctrl->ops->open(ctrl);
> +}
> +EXPORT_SYMBOL_GPL(serdev_device_open);

I would expect an error code if a serdev has no controller / open
method assigned?

> [...]
>
> +static int of_serdev_register_devices(struct serdev_controller *ctrl)
> +{
> +	struct device_node *node;
> +	struct serdev_device *serdev = NULL;
> +	int err;
> +	bool found = false;
> +
> +	for_each_available_child_of_node(ctrl->dev.of_node, node) {
> +		if (!of_get_property(node, "compatible", NULL))
> +			continue;
> +
> +		dev_dbg(&ctrl->dev, "adding child %s\n", node->full_name);
> +
> +		serdev = serdev_device_alloc(ctrl);
> +		if (!serdev)
> +			continue;
> +
> +		serdev->dev.of_node = node;
> +
> +		err = serdev_device_add(serdev);
> +		if (err) {
> +			dev_err(&serdev->dev,
> +				"failure adding device. status %d\n", err);
> +			serdev_device_put(serdev);

missing continue here?

> +		}
> +		found = true;
> +	}
> +	if (!found)
> +		return -ENODEV;
> +
> +	return 0;
> +}

-- Sebastian