of: find also nodes by mixture of alias and path

Let of_find_node_by_path_or_alias also find a node starting with an alias
followed by a path like "i2c0/tps@24"

Signed-off-by: Jan Weitzel <j.weitzel@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 22 insertions, 1 deletions

diff --git a/drivers/of/base.c b/drivers/of/base.c
index ea2d879be4..6e5e7d6e76 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -1378,11 +1378,32 @@ EXPORT_SYMBOL(of_find_node_by_path);
 struct device_node *of_find_node_by_path_or_alias(struct device_node *root,
 		const char *str)
 {
+	struct device_node *node;
+	const char *slash;
+	char *alias;
+	size_t len = 0;
+
 	if (*str ==  '/')
 		return of_find_node_by_path_from(root, str);
-	else
+
+	slash = strchr(str, '/');
+
+	if (!slash)
 		return of_find_node_by_alias(root, str);
 
+	len = slash - str + 1;
+	alias = xmalloc(len);
+	strlcpy(alias, str, len);
+
+	node = of_find_node_by_alias(root, alias);
+
+	if (!node)
+		goto out;
+
+	node = of_find_node_by_path_from(node, slash);
+out:
+	free(alias);
+	return node;
 }
 EXPORT_SYMBOL(of_find_node_by_path_or_alias);