1 files changed, 47 insertions, 0 deletions

diff --git a/drivers/of/base.c b/drivers/of/base.c
index 466e3c8582f0..9095b8290150 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -54,6 +54,28 @@ DEFINE_MUTEX(of_mutex);
  */
 DEFINE_RAW_SPINLOCK(devtree_lock);
 
+bool of_node_name_eq(const struct device_node *np, const char *name)
+{
+        const char *node_name;
+        size_t len;
+
+        if (!np)
+                return false;
+
+        node_name = kbasename(np->full_name);
+        len = strchrnul(node_name, '@') - node_name;
+
+        return (strlen(name) == len) && (strncmp(node_name, name, len) == 0);
+}
+
+bool of_node_name_prefix(const struct device_node *np, const char *prefix)
+{
+        if (!np)
+                return false;
+
+        return strncmp(kbasename(np->full_name), prefix, strlen(prefix)) == 0;
+}
+
 int of_n_addr_cells(struct device_node *np)
 {
         u32 cells;
@@ -720,6 +742,31 @@ struct device_node *of_get_next_available_child(const struct device_node *node,
 EXPORT_SYMBOL(of_get_next_available_child);
 
 /**
+ * of_get_compatible_child - Find compatible child node
+ * @parent:     parent node
+ * @compatible: compatible string
+ *
+ * Lookup child node whose compatible property contains the given compatible
+ * string.
+ *
+ * Returns a node pointer with refcount incremented, use of_node_put() on it
+ * when done; or NULL if not found.
+ */
+struct device_node *of_get_compatible_child(const struct device_node *parent,
+                                const char *compatible)
+{
+        struct device_node *child;
+
+        for_each_child_of_node(parent, child) {
+                if (of_device_is_compatible(child, compatible))
+                        break;
+        }
+
+        return child;
+}
+EXPORT_SYMBOL(of_get_compatible_child);
+
+/**
  *      of_get_child_by_name - Find the child node by name for a given parent
  *      @node:  parent node
  *      @name:  child name to look for.