In order to differentiate the functionality between dropping a reference
to the node (or not) for the benefit of OF, introduce
fwnode_get_next_parent().
Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
---
since v5:
- Call fwnode_get_parent() to get the parent, independently of the FW
type. In other words, squashed "device property: Implement
fwnode_get_next_parent() using fwnode interface" to this one.
drivers/base/property.c | 21 +++++++++++++++++++++
include/linux/property.h | 1 +
2 files changed, 22 insertions(+)
diff --git a/drivers/base/property.c b/drivers/base/property.c
index a4fe66c..0a120e3 100644
--- a/drivers/base/property.c
+++ b/drivers/base/property.c
@@ -976,6 +976,27 @@ int device_add_properties(struct device *dev,
EXPORT_SYMBOL_GPL(device_add_properties);
/**
+ * fwnode_get_next_parent - Iterate to the node's parent
+ * @fwnode: Firmware whose parent is retrieved
+ *
+ * This is like fwnode_get_parent() except that it drops the refcount
+ * on the passed node, making it suitable for iterating through a
+ * node's parents.
+ *
+ * Returns a node pointer with refcount incremented, use
+ * fwnode_handle_node() on it when done.
+ */
+struct fwnode_handle *fwnode_get_next_parent(struct fwnode_handle *fwnode)
+{
+ struct fwnode_handle *parent = fwnode_get_parent(fwnode);
+
+ fwnode_handle_put(fwnode);
+
+ return parent;
+}
+EXPORT_SYMBOL_GPL(fwnode_get_next_parent);
+
+/**
* fwnode_get_parent - Return parent firwmare node
* @fwnode: Firmware whose parent is retrieved
*
diff --git a/include/linux/property.h b/include/linux/property.h
index 3a4e435..2f48261 100644
--- a/include/linux/property.h
+++ b/include/linux/property.h
@@ -73,6 +73,7 @@ int fwnode_property_match_string(struct fwnode_handle *fwnode,
const char *propname, const char *string);
struct fwnode_handle *fwnode_get_parent(struct fwnode_handle *fwnode);
+struct fwnode_handle *fwnode_get_next_parent(struct fwnode_handle *fwnode);
struct fwnode_handle *fwnode_get_next_child_node(struct fwnode_handle *fwnode,
struct fwnode_handle *child);
--
2.7.4
--
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