On Tue, Aug 25, 2020 at 04:59:50PM +0300, Heikki Krogerus wrote:

This helper will register a software node and then assign
it to device at the same time. The function will also make
sure that the device can't have more than one software node.

+	/* Only one software node per device. */
+	if (dev_to_swnode(dev))
+		return -EBUSY;

+	swnode = dev_to_swnode(dev);
+	if (!swnode)
+		return;

Hmm... I didn't find implementation of dev_to_swnode().
What did I miss?

-- 
With Best Regards,
Andy Shevchenko