[PATCH v5 07/14] of_graph: add of_graph_get_endpoint_count()

From: Kuninori Morimoto
Date: Sun Nov 27 2016 - 21:47:01 EST



From: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>

OF graph want to count its endpoint number, same as
of_get_child_count(). This patch adds of_graph_get_endpoint_count()
which can check specific type. It will count all endpoint if type
was NULL.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
---
drivers/of/base.c | 16 ++++++++++++++++
include/linux/of_graph.h | 8 ++++++++
2 files changed, 24 insertions(+)

diff --git a/drivers/of/base.c b/drivers/of/base.c
index 705ea15..76d2819 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -2596,3 +2596,19 @@ bool of_graph_port_type_is(struct device_node *port, char *type)
return false;
}
EXPORT_SYMBOL(of_graph_port_type_is);
+
+int of_graph_get_endpoint_count(const struct device_node *np, char *type)
+{
+ struct device_node *port, *endpoint;
+ int num = 0;
+
+ for_each_of_endpoint(np, port, endpoint) {
+ if (!type)
+ num++;
+ else
+ num += of_graph_port_type_is(port, type);
+ }
+
+ return num;
+}
+EXPORT_SYMBOL(of_graph_get_endpoint_count);
diff --git a/include/linux/of_graph.h b/include/linux/of_graph.h
index 7f735f8..826752f 100644
--- a/include/linux/of_graph.h
+++ b/include/linux/of_graph.h
@@ -52,11 +52,13 @@ struct of_endpoint {
child = of_graph_get_next_endpoint(parent, child))

#define of_graph_port_type_is_sound(n) of_graph_port_type_is(n, "sound")
+#define of_graph_get_sound_endpoint_count(n) of_graph_get_endpoint_count(n, "sound")

#ifdef CONFIG_OF
int of_graph_parse_endpoint(const struct device_node *node,
struct of_endpoint *endpoint);
bool of_graph_port_type_is(struct device_node *port, char *type);
+int of_graph_get_endpoint_count(const struct device_node *np, char *type);
struct device_node *of_graph_get_port_by_id(struct device_node *node, u32 id);
struct device_node *of_graph_get_top_port(struct device *dev);
struct device_node *of_graph_get_next_port(const struct device_node *parent,
@@ -87,6 +89,12 @@ static bool of_graph_port_type_is(struct device_node *port, char *type)
return false;
}

+static inline int of_graph_get_endpoint_count(const struct device_node *np,
+ char *type)
+{
+ return 0;
+}
+
static inline struct device_node *of_graph_get_port_by_id(
struct device_node *node, u32 id)
{
--
1.9.1