LXR linux/include/linux/of

   1/*
   2 * OF graph binding parsing helpers
   3 *
   4 * Copyright (C) 2012 - 2013 Samsung Electronics Co., Ltd.
   5 * Author: Sylwester Nawrocki <s.nawrocki@samsung.com>
   6 *
   7 * Copyright (C) 2012 Renesas Electronics Corp.
   8 * Author: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
   9 *
  10 * This program is free software; you can redistribute it and/or modify
  11 * it under the terms of version 2 of the GNU General Public License as
  12 * published by the Free Software Foundation.
  13 */
  14#ifndef __LINUX_OF_GRAPH_H
  15#define __LINUX_OF_GRAPH_H
  16
  17/**
  18 * struct of_endpoint - the OF graph endpoint data structure
  19 * @port: identifier (value of reg property) of a port this endpoint belongs to
  20 * @id: identifier (value of reg property) of this endpoint
  21 * @local_node: pointer to device_node of this endpoint
  22 */
  23struct of_endpoint {
  24        unsigned int port;
  25        unsigned int id;
  26        const struct device_node *local_node;
  27};
  28
  29#ifdef CONFIG_OF
  30int of_graph_parse_endpoint(const struct device_node *node,
  31                                struct of_endpoint *endpoint);
  32struct device_node *of_graph_get_next_endpoint(const struct device_node *parent,
  33                                        struct device_node *previous);
  34struct device_node *of_graph_get_remote_port_parent(
  35                                        const struct device_node *node);
  36struct device_node *of_graph_get_remote_port(const struct device_node *node);
  37#else
  38
  39static inline int of_graph_parse_endpoint(const struct device_node *node,
  40                                        struct of_endpoint *endpoint)
  41{
  42        return -ENOSYS;
  43}
  44
  45static inline struct device_node *of_graph_get_next_endpoint(
  46                                        const struct device_node *parent,
  47                                        struct device_node *previous)
  48{
  49        return NULL;
  50}
  51
  52static inline struct device_node *of_graph_get_remote_port_parent(
  53                                        const struct device_node *node)
  54{
  55        return NULL;
  56}
  57
  58static inline struct device_node *of_graph_get_remote_port(
  59                                        const struct device_node *node)
  60{
  61        return NULL;
  62}
  63
  64#endif /* CONFIG_OF */
  65
  66#endif /* __LINUX_OF_GRAPH_H */
  67