From 0ef472a973ebbfc20f2f12769e77a8cfd3612778 Mon Sep 17 00:00:00 2001 From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Date: Thu, 20 Apr 2017 01:32:17 +0000 Subject: of_graph: add of_graph_get_port_parent() Linux kernel already has of_graph_get_remote_port_parent(), but, sometimes we want to get own port parent. This patch adds of_graph_get_port_parent() Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Mark Brown <broonie@kernel.org> --- drivers/of/base.c | 30 ++++++++++++++++++++++-------- 1 file changed, 22 insertions(+), 8 deletions(-) (limited to 'drivers/of/base.c') diff --git a/drivers/of/base.c b/drivers/of/base.c index b169508a9b56..4c305599a664 100644 --- a/drivers/of/base.c +++ b/drivers/of/base.c @@ -2500,6 +2500,27 @@ struct device_node *of_graph_get_remote_endpoint(const struct device_node *node) } EXPORT_SYMBOL(of_graph_get_remote_endpoint); +/** + * of_graph_get_port_parent() - get port's parent node + * @node: pointer to a local endpoint device_node + * + * Return: device node associated with endpoint node linked + * to @node. Use of_node_put() on it when done. + */ +struct device_node *of_graph_get_port_parent(struct device_node *node) +{ + unsigned int depth; + + /* Walk 3 levels up only if there is 'ports' node. */ + for (depth = 3; depth && node; depth--) { + node = of_get_next_parent(node); + if (depth == 2 && of_node_cmp(node->name, "ports")) + break; + } + return node; +} +EXPORT_SYMBOL(of_graph_get_port_parent); + /** * of_graph_get_remote_port_parent() - get remote port's parent node * @node: pointer to a local endpoint device_node @@ -2511,18 +2532,11 @@ struct device_node *of_graph_get_remote_port_parent( const struct device_node *node) { struct device_node *np; - unsigned int depth; /* Get remote endpoint node. */ np = of_graph_get_remote_endpoint(node); - /* Walk 3 levels up only if there is 'ports' node. */ - for (depth = 3; depth && np; depth--) { - np = of_get_next_parent(np); - if (depth == 2 && of_node_cmp(np->name, "ports")) - break; - } - return np; + return of_graph_get_port_parent(np); } EXPORT_SYMBOL(of_graph_get_remote_port_parent); -- cgit v1.2.1