[XEN][RFC PATCH v4 05/16] xen/device-tree: Add _dt_find_node_by_path() to find nodes in device tree

[Vikram Garhwal <vikram.garhwal@xxxxxxx>]

Add _dt_find_by_path() to find a matching node with path for a dt_device_node.

Signed-off-by: Vikram Garhwal <vikram.garhwal@xxxxxxx>
---
 xen/common/device_tree.c      |  5 +++--
 xen/include/xen/device_tree.h | 16 ++++++++++++++--
 2 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/xen/common/device_tree.c b/xen/common/device_tree.c
index 6518eff9b0..acf26a411d 100644
--- a/xen/common/device_tree.c
+++ b/xen/common/device_tree.c
@@ -358,11 +358,12 @@ struct dt_device_node *dt_find_node_by_type(struct 
dt_device_node *from,
     return np;
 }
 
-struct dt_device_node *dt_find_node_by_path(const char *path)
+struct dt_device_node *device_tree_find_node_by_path(struct dt_device_node *dt,
+                                                     const char *path)
 {
     struct dt_device_node *np;
 
-    dt_for_each_device_node(dt_host, np)
+    dt_for_each_device_node(dt, np)
         if ( np->full_name && (dt_node_cmp(np->full_name, path) == 0) )
             break;
 
diff --git a/xen/include/xen/device_tree.h b/xen/include/xen/device_tree.h
index bde46d7120..51e251b0b4 100644
--- a/xen/include/xen/device_tree.h
+++ b/xen/include/xen/device_tree.h
@@ -537,13 +537,25 @@ struct dt_device_node *dt_find_node_by_type(struct 
dt_device_node *from,
 struct dt_device_node *dt_find_node_by_alias(const char *alias);
 
 /**
- * dt_find_node_by_path - Find a node matching a full DT path
+ * device_tree_find_node_by_path - Find a node matching a full DT path
+ * @dt_node: The device tree to search
  * @path: The full path to match
  *
  * Returns a node pointer.
  */
-struct dt_device_node *dt_find_node_by_path(const char *path);
+struct dt_device_node *device_tree_find_node_by_path(struct dt_device_node *dt,
+                                                     const char *path);
 
+/**
+ * dt_find_node_by_path - Find a node matching a full DT path
+ * @path: The full path to match
+ *
+ * Returns a node pointer.
+ */
+static inline struct dt_device_node *dt_find_node_by_path(const char *path)
+{
+    return device_tree_find_node_by_path(dt_host, path);
+}
 
 /**
  * dt_find_node_by_gpath - Same as dt_find_node_by_path but retrieve the
-- 
2.17.1