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Commit 0ef472a9 authored by Kuninori Morimoto's avatar Kuninori Morimoto Committed by Mark Brown
Browse files

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: default avatarKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 4c9c3d59

drivers/of/base.c

+22 −8
Original line number Diff line number Diff line
@@ -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);

include/linux/of_graph.h

+7 −0
Original line number Diff line number Diff line
@@ -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)

{