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    Subject[PATCH v4 05/12] of_graph: add of_graph_get_port/endpoint_count()
    Date

    From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.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@renesas.com>
    ---
    v3 -> v4

    - no change

    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 8207631..9089459 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
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