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of_graph: add of_graph_get_remote_endpoint() 

It should use same method to get same result.
To getting remote-endpoint node,
let's use of_graph_get_remote_endpoint()

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>
hifive-unleashed-5.1
Kuninori Morimoto 2017-04-20 01:31:42 +00:00 committed by Mark Brown
parent 00bab23f72
commit 4c9c3d595f
2 changed files with 24 additions and 2 deletions
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18
drivers/of/base.c
View File

@ -2486,6 +2486,20 @@ struct device_node *of_graph_get_endpoint_by_regs(
}
EXPORT_SYMBOL(of_graph_get_endpoint_by_regs);
/**
* of_graph_get_remote_endpoint() - get remote endpoint node
* @node: pointer to a local endpoint device_node
*
* Return: Remote endpoint node associated with remote endpoint node linked
* to @node. Use of_node_put() on it when done.
*/
struct device_node *of_graph_get_remote_endpoint(const struct device_node *node)
{
/* Get remote endpoint node. */
return of_parse_phandle(node, "remote-endpoint", 0);
}
EXPORT_SYMBOL(of_graph_get_remote_endpoint);
/**
* of_graph_get_remote_port_parent() - get remote port's parent node
* @node: pointer to a local endpoint device_node
@ -2500,7 +2514,7 @@ struct device_node *of_graph_get_remote_port_parent(
unsigned int depth;
/* Get remote endpoint node. */
np = of_parse_phandle(node, "remote-endpoint", 0);
np = of_graph_get_remote_endpoint(node);
/* Walk 3 levels up only if there is 'ports' node. */
for (depth = 3; depth && np; depth--) {
@ -2524,7 +2538,7 @@ struct device_node *of_graph_get_remote_port(const struct device_node *node)
struct device_node *np;
/* Get remote endpoint node. */
np = of_parse_phandle(node, "remote-endpoint", 0);
np = of_graph_get_remote_endpoint(node);
if (!np)
return NULL;
return of_get_next_parent(np);

8
include/linux/of_graph.h
View File

@ -48,6 +48,8 @@ struct device_node *of_graph_get_next_endpoint(const struct device_node *parent,
struct device_node *previous);
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_remote_port_parent(
const struct device_node *node);
struct device_node *of_graph_get_remote_port(const struct device_node *node);
@ -80,6 +82,12 @@ static inline struct device_node *of_graph_get_endpoint_by_regs(
return NULL;
}
static inline struct device_node *of_graph_get_remote_endpoint(
const struct device_node *node)
{
return NULL;
}
static inline struct device_node *of_graph_get_remote_port_parent(
const struct device_node *node)
{