[PATCH v6 2/9] of_graph: add of_graph_get_remote_endpoint()

Kuninori Morimoto
2017-04-18T02:39:49Z

It should use same method to get same result.
To getting remote-endpoint node,
let's use of_graph_get_remote_endpoint()

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>
---
v5 -> v6

- no change

drivers/of/base.c | 18 ++++++++++++++++--
include/linux/of_graph.h | 8 ++++++++
2 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/drivers/of/base.c b/drivers/of/base.c
index d9adaa9..1ae2510 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -2457,6 +2457,20 @@ struct device_node *of_graph_get_endpoint_by_regs(
EXPORT_SYMBOL(of_graph_get_endpoint_by_regs);

/**
+ * of_graph_get_remote_endpoint() - get remote endpoint node
+ * @node: pointer to a local endpoint device_node
+ *
+ * Return: Remote endpoint node associated with remote endpoint node linked
+ * to @node. Use of_node_put() on it when done.
+ */
+struct device_node *of_graph_get_remote_endpoint(const struct device_node *node)
+{
+ /* Get remote endpoint node. */
+ return of_parse_phandle(node, "remote-endpoint", 0);
+}
+EXPORT_SYMBOL(of_graph_get_remote_endpoint);
+
+/**
* of_graph_get_remote_port_parent() - get remote port's parent node
* @node: pointer to a local endpoint device_node
*
@@ -2470,7 +2484,7 @@ struct device_node *of_graph_get_remote_port_parent(
unsigned int depth;

/* Get remote endpoint node. */
- np = of_parse_phandle(node, "remote-endpoint", 0);
+ np = of_graph_get_remote_endpoint(node);

/* Walk 3 levels up only if there is 'ports' node. */
for (depth = 3; depth && np; depth--) {
@@ -2494,7 +2508,7 @@ struct device_node *of_graph_get_remote_port(const struct device_node *node)
struct device_node *np;

/* Get remote endpoint node. */
- np = of_parse_phandle(node, "remote-endpoint", 0);
+ np = of_graph_get_remote_endpoint(node);
if (!np)
return NULL;
return of_get_next_parent(np);
diff --git a/include/linux/of_graph.h b/include/linux/of_graph.h
index abdb02e..0c9473a 100644
--- a/include/linux/of_graph.h
+++ b/include/linux/of_graph.h
@@ -48,6 +48,8 @@ struct device_node *of_graph_get_next_endpoint(const struct device_node *parent,
struct device_node *previous);
struct device_node *of_graph_get_endpoint_by_regs(
const struct device_node *parent, int port_reg, int reg);
+struct device_node *of_graph_get_remote_endpoint(
+ const struct device_node *node);
struct device_node *of_graph_get_remote_port_parent(
const struct device_node *node);
struct device_node *of_graph_get_remote_port(const struct device_node *node);
@@ -80,6 +82,12 @@ static inline struct device_node *of_graph_get_endpoint_by_regs(
return NULL;
}

+static inline struct device_node *of_graph_get_remote_endpoint(
+ const struct device_node *node)
+{
+ return NULL;
+}
+
static inline struct device_node *of_graph_get_remote_port_parent(
const struct device_node *node)