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@xxxxxxxxxxxxxxx>
---
drivers/base/swnode.c | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/drivers/base/swnode.c b/drivers/base/swnode.c
index 89ad8dee6ad5..1fad9291f6aa 100644
--- a/drivers/base/swnode.c
+++ b/drivers/base/swnode.c
@@ -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,
};
/* -------------------------------------------------------------------------- */
--
2.20.1
