From 0ef472a973ebbfc20f2f12769e77a8cfd3612778 Mon Sep 17 00:00:00 2001
From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Date: Thu, 20 Apr 2017 01:32:17 +0000
Subject: 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>
---
drivers/of/base.c | 30 ++++++++++++++++++++++--------
1 file changed, 22 insertions(+), 8 deletions(-)
(limited to 'drivers/of/base.c')
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
@@ -2500,6 +2500,27 @@ 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);
--
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