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of_graph: add of_graph_get_port_parent()

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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>
This commit is contained in:
Kuninori Morimoto 2017-04-20 01:32:17 +00:00 • committed by Mark Brown
parent 4c9c3d595f
commit 0ef472a973
2 changed files with 29 additions and 8 deletions
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7
include/linux/of_graph.h
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@ -50,6 +50,7 @@ struct device_node *of_graph_get_endpoint_by_regs(
const struct device_node *parent, int port_reg, int reg);
struct device_node *of_graph_get_remote_endpoint(
const struct device_node *node);
struct device_node *of_graph_get_port_parent(struct device_node *node);
struct device_node *of_graph_get_remote_port_parent(
const struct device_node *node);
struct device_node *of_graph_get_remote_port(const struct device_node *node);
@ -88,6 +89,12 @@ static inline struct device_node *of_graph_get_remote_endpoint(
return NULL;
}
static inline struct device_node *of_graph_get_port_parent(
struct device_node *node)
{
return NULL;
}
static inline struct device_node *of_graph_get_remote_port_parent(
const struct device_node *node)
{