linux-kernel - [PATCH 10/17] of_graph: add of_graph_get_port/endpoint

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Date:   Mon, 31 Oct 2016 01:18:39 +0000
From:   Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
To:     Rob Herring <robh+dt@...nel.org>, Mark Brown <broonie@...nel.org>
CC:     Linux-ALSA <alsa-devel@...a-project.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Simon <horms@...ge.net.au>,
        Laurent <laurent.pinchart@...asonboard.com>,
        Guennadi <g.liakhovetski@....de>,
        Grant Likely <grant.likely@...aro.org>,
        Frank Rowand <frowand.list@...il.com>,
        Linux-DT <devicetree@...r.kernel.org>,
        Linux-Kernel <linux-kernel@...r.kernel.org>
Subject: [PATCH 10/17] of_graph: add of_graph_get_port/endpoint_count()


From: Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>

OF graph want to count its port/endpoint number, same as
of_get_child_count(). This patch adds these functions.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
---
 drivers/of/base.c        | 24 ++++++++++++++++++++++++
 include/linux/of_graph.h |  8 ++++++++
 2 files changed, 32 insertions(+)

diff --git a/drivers/of/base.c b/drivers/of/base.c
index b11f533..e795d0f 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -2584,3 +2584,27 @@ struct device_node *of_graph_get_remote_port(const struct device_node *node)
 	return of_get_next_parent(np);
 }
 EXPORT_SYMBOL(of_graph_get_remote_port);
+
+int of_graph_get_port_count(const struct device_node *np)
+{
+	struct device_node *port;
+	int num = 0;
+
+	for_each_of_port(np, port)
+		num++;
+
+	return num;
+}
+EXPORT_SYMBOL(of_graph_get_port_count);
+
+int of_graph_get_endpoint_count(const struct device_node *np)
+{
+	struct device_node *port, *endpoint;
+	int num = 0;
+
+	for_each_of_endpoint(np, port, endpoint)
+		num++;
+
+	return num;
+}
+EXPORT_SYMBOL(of_graph_get_endpoint_count);
diff --git a/include/linux/of_graph.h b/include/linux/of_graph.h
index 3de036f..c060a7c 100644
--- a/include/linux/of_graph.h
+++ b/include/linux/of_graph.h
@@ -54,6 +54,8 @@ struct of_endpoint {
 #ifdef CONFIG_OF
 int of_graph_parse_endpoint(const struct device_node *node,
 				struct of_endpoint *endpoint);
+int of_graph_get_port_count(const struct device_node *np);
+int of_graph_get_endpoint_count(const struct device_node *np);
 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,
@@ -79,6 +81,12 @@ static inline int of_graph_parse_endpoint(const struct device_node *node,
 	return -ENOSYS;
 }
 
+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