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authorKuninori Morimoto <kuninori.morimoto.gx@renesas.com>2017-04-20 03:32:17 +0200
committerMark Brown <broonie@kernel.org>2017-05-17 11:21:12 +0200
commit0ef472a973ebbfc20f2f12769e77a8cfd3612778 (patch)
treeef4228cd70a146b12f63e699e64e726e5b5cd54b /drivers/of
parentof_graph: add of_graph_get_remote_endpoint() (diff)
downloadlinux-0ef472a973ebbfc20f2f12769e77a8cfd3612778.tar.xz
linux-0ef472a973ebbfc20f2f12769e77a8cfd3612778.zip
of_graph: add of_graph_get_port_parent()
Linux kernel already has of_graph_get_remote_port_parent(), but, sometimes we want to get own port parent. This patch adds of_graph_get_port_parent() Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/of')
-rw-r--r--drivers/of/base.c30
1 files changed, 22 insertions, 8 deletions
diff --git a/drivers/of/base.c b/drivers/of/base.c
index b169508a9b56..4c305599a664 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -2501,6 +2501,27 @@ struct device_node *of_graph_get_remote_endpoint(const struct device_node *node)
EXPORT_SYMBOL(of_graph_get_remote_endpoint);
/**
+ * of_graph_get_port_parent() - get port's parent node
+ * @node: pointer to a local endpoint device_node
+ *
+ * Return: device node associated with endpoint node linked
+ * to @node. Use of_node_put() on it when done.
+ */
+struct device_node *of_graph_get_port_parent(struct device_node *node)
+{
+ unsigned int depth;
+
+ /* Walk 3 levels up only if there is 'ports' node. */
+ for (depth = 3; depth && node; depth--) {
+ node = of_get_next_parent(node);
+ if (depth == 2 && of_node_cmp(node->name, "ports"))
+ break;
+ }
+ return node;
+}
+EXPORT_SYMBOL(of_graph_get_port_parent);
+
+/**
* of_graph_get_remote_port_parent() - get remote port's parent node
* @node: pointer to a local endpoint device_node
*
@@ -2511,18 +2532,11 @@ struct device_node *of_graph_get_remote_port_parent(
const struct device_node *node)
{
struct device_node *np;
- unsigned int depth;
/* Get remote endpoint node. */
np = of_graph_get_remote_endpoint(node);
- /* Walk 3 levels up only if there is 'ports' node. */
- for (depth = 3; depth && np; depth--) {
- np = of_get_next_parent(np);
- if (depth == 2 && of_node_cmp(np->name, "ports"))
- break;
- }
- return np;
+ return of_graph_get_port_parent(np);
}
EXPORT_SYMBOL(of_graph_get_remote_port_parent);