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Commit 125ee6b3 authored by Sakari Ailus's avatar Sakari Ailus Committed by Rafael J. Wysocki
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device property: Add FW type agnostic fwnode_graph_get_remote_node 



Add fwnode_graph_get_remote_node() function which is equivalent to
of_graph_get_remote_node() on OF.

Signed-off-by: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: default avatarMika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 2294b3af

drivers/base/property.c

+37 −0
Original line number Diff line number Diff line
@@ -1215,6 +1215,43 @@ fwnode_graph_get_remote_endpoint(struct fwnode_handle *fwnode) 
}

EXPORT_SYMBOL_GPL(fwnode_graph_get_remote_endpoint);



/**

 * fwnode_graph_get_remote_node - get remote parent node for given port/endpoint

 * @fwnode: pointer to parent fwnode_handle containing graph port/endpoint

 * @port_id: identifier of the parent port node

 * @endpoint_id: identifier of the endpoint node

 *

 * Return: Remote fwnode handle associated with remote endpoint node linked

 *	   to @node. Use fwnode_node_put() on it when done.

 */

struct fwnode_handle *fwnode_graph_get_remote_node(struct fwnode_handle *fwnode,

						   u32 port_id, u32 endpoint_id)

{

	struct fwnode_handle *endpoint = NULL;



	while ((endpoint = fwnode_graph_get_next_endpoint(fwnode, endpoint))) {

		struct fwnode_endpoint fwnode_ep;

		struct fwnode_handle *remote;

		int ret;



		ret = fwnode_graph_parse_endpoint(endpoint, &fwnode_ep);

		if (ret < 0)

			continue;



		if (fwnode_ep.port != port_id || fwnode_ep.id != endpoint_id)

			continue;



		remote = fwnode_graph_get_remote_port_parent(endpoint);

		if (!remote)

			return NULL;



		return fwnode_device_is_available(remote) ? remote : NULL;

	}



	return NULL;

}

EXPORT_SYMBOL_GPL(fwnode_graph_get_remote_node);



/**

 * fwnode_graph_parse_endpoint - parse common endpoint node properties

 * @fwnode: pointer to endpoint fwnode_handle

include/linux/property.h

+2 −0
Original line number Diff line number Diff line
@@ -281,6 +281,8 @@ struct fwnode_handle *fwnode_graph_get_remote_port( 
	struct fwnode_handle *fwnode);

struct fwnode_handle *fwnode_graph_get_remote_endpoint(

	struct fwnode_handle *fwnode);

struct fwnode_handle *fwnode_graph_get_remote_node(struct fwnode_handle *fwnode,

						   u32 port, u32 endpoint);



int fwnode_graph_parse_endpoint(struct fwnode_handle *fwnode,

				struct fwnode_endpoint *endpoint);