Added of_find_node_by_phandle_from() to find nodes by
phandle with a given root node.
Signed-off-by: Teresa Gámez <t.ga...@phytec.de>
---
drivers/of/base.c | 28 ++++++++++++++++++++++++----
include/of.h | 8 ++++++++
2 files changed, 32 insertions(+), 4 deletions(-)
diff --git a/drivers/of/base.c b/drivers/of/base.c
index c440a69..061fc79 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -265,19 +265,39 @@ struct device_node *of_find_node_by_alias(struct
device_node *root, const char *
EXPORT_SYMBOL_GPL(of_find_node_by_alias);
/*
- * of_find_node_by_phandle - Find a node given a phandle
- * @handle: phandle of the node to find
+ * of_find_node_by_phandle_from - Find a node given a phandle from given
+ * root node.
+ * @handle: phandle of the node to find
+ * @root: root node of the tree to search in. If NULL use the
+ * internal tree.
*/
-struct device_node *of_find_node_by_phandle(phandle phandle)
+struct device_node *of_find_node_by_phandle_from(phandle phandle,
+ struct device_node *root)
{
struct device_node *node;
- of_tree_for_each_node_from(node, root_node)
+ if (!root)
+ root = root_node;
+
+ if (!root)
+ return 0;
+
+ of_tree_for_each_node_from(node, root)
if (node->phandle == phandle)
return node;
return NULL;
}
+EXPORT_SYMBOL(of_find_node_by_phandle_from);
+
+/*
+ * of_find_node_by_phandle - Find a node given a phandle
+ * @handle: phandle of the node to find
+ */
+struct device_node *of_find_node_by_phandle(phandle phandle)
+{
+ return of_find_node_by_phandle_from(phandle, root_node);
+}
EXPORT_SYMBOL(of_find_node_by_phandle);
/*
diff --git a/include/of.h b/include/of.h
index cd2bfe0..4281cce 100644
--- a/include/of.h
+++ b/include/of.h
@@ -123,6 +123,8 @@ extern struct device_node *of_find_node_by_path_from(struct
device_node *from,
const char *path);
extern struct device_node *of_find_node_by_path(const char *path);
extern struct device_node *of_find_node_by_phandle(phandle phandle);
+extern struct device_node *of_find_node_by_phandle_from(phandle phandle,
+ struct device_node *root);
extern struct device_node *of_find_node_by_type(struct device_node *from,
const char *type);
extern struct device_node *of_find_compatible_node(struct device_node *from,
@@ -472,6 +474,12 @@ static inline struct device_node
*of_find_node_by_phandle(phandle phandle)
return NULL;
}
+static inline struct device_node *of_find_node_by_phandle_from(phandle phandle,
+ struct device_node *root)
+{
+ return NULL;
+}
+
static inline struct device_node *of_find_compatible_node(
struct device_node *from,
const char *type,
--
1.9.1
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