software node: Implement get_named_child_node fwnode callback (34479820) · Commits · 戴 / test

This makes it possible to support drivers that use fwnode_get_named_child_node() and device_get_named_child_node() functions. The node name is for now taken from a device property named "name". That mimics the old style of naming of the nodes in devicetree (though with modern flattened DT, the name is matched against the actual node-name, it used to be done with a property "name"). In Open Firmware DT the "name" property is also still being used. Signed-off-by:

Heikki Krogerus <heikki.krogerus@linux.intel.com> Signed-off-by:

Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/base/swnode.c

+23 −0

Original line number	Diff line number	Diff line
		@@ -499,6 +499,28 @@ software_node_get_next_child(const struct fwnode_handle *fwnode,
		return &c->fwnode;
		}

		static struct fwnode_handle *
		software_node_get_named_child_node(const struct fwnode_handle *fwnode,
		const char *childname)
		{
		struct software_node *swnode = to_software_node(fwnode);
		const struct property_entry *prop;
		struct software_node *child;

		if (!swnode \|\| list_empty(&swnode->children))
		return NULL;

		list_for_each_entry(child, &swnode->children, entry) {
		prop = property_entry_get(child->properties, "name");
		if (!prop)
		continue;
		if (!strcmp(childname, prop->value.str)) {
		kobject_get(&child->kobj);
		return &child->fwnode;
		}
		}
		return NULL;
		}

		static const struct fwnode_operations software_node_ops = {
		.get = software_node_get,
		@@ -508,6 +530,7 @@ static const struct fwnode_operations software_node_ops = {
		.property_read_string_array = software_node_read_string_array,
		.get_parent = software_node_get_parent,
		.get_next_child_node = software_node_get_next_child,
		.get_named_child_node = software_node_get_named_child_node,
		};

		/* -------------------------------------------------------------------------- */

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