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    Subject[RFC PATCH 01/12] dt: Add of_find_child_node_by_name()
    Date
    This function retrieves a named child node of a given parent node.

    Signed-off-by: Stephen Warren <swarren@nvidia.com>
    ---
    drivers/of/base.c | 18 ++++++++++++++++++
    include/linux/of.h | 2 ++
    2 files changed, 20 insertions(+), 0 deletions(-)

    diff --git a/drivers/of/base.c b/drivers/of/base.c
    index 3ff22e3..7eea9e3 100644
    --- a/drivers/of/base.c
    +++ b/drivers/of/base.c
    @@ -388,6 +388,24 @@ struct device_node *of_find_node_by_name(struct device_node *from,
    }
    EXPORT_SYMBOL(of_find_node_by_name);

    +struct device_node *of_find_child_node_by_name(
    + const struct device_node *parent, const char *name)
    +{
    + struct device_node *child;
    +
    + read_lock(&devtree_lock);
    +
    + for_each_child_of_node(parent, child) {
    + if (!strcmp(child->name, name))
    + break;
    + }
    +
    + read_unlock(&devtree_lock);
    +
    + return child;
    +}
    +EXPORT_SYMBOL(of_find_child_node_by_name);
    +
    /**
    * of_find_node_by_type - Find a node by its "device_type" property
    * @from: The node to start searching from, or NULL to start searching
    diff --git a/include/linux/of.h b/include/linux/of.h
    index 9180dc5..032c71b 100644
    --- a/include/linux/of.h
    +++ b/include/linux/of.h
    @@ -161,6 +161,8 @@ extern struct device_node *of_find_node_by_name(struct device_node *from,
    #define for_each_node_by_name(dn, name) \
    for (dn = of_find_node_by_name(NULL, name); dn; \
    dn = of_find_node_by_name(dn, name))
    +extern struct device_node *of_find_child_node_by_name(
    + const struct device_node *node, const char *name);
    extern struct device_node *of_find_node_by_type(struct device_node *from,
    const char *type);
    #define for_each_node_by_type(dn, type) \
    --
    1.7.0.4


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