LXR linux/include/linux/of.h

   1#ifndef _LINUX_OF_H
   2#define _LINUX_OF_H
   3/*
   4 * Definitions for talking to the Open Firmware PROM on
   5 * Power Macintosh and other computers.
   6 *
   7 * Copyright (C) 1996-2005 Paul Mackerras.
   8 *
   9 * Updates for PPC64 by Peter Bergner & David Engebretsen, IBM Corp.
  10 * Updates for SPARC64 by David S. Miller
  11 * Derived from PowerPC and Sparc prom.h files by Stephen Rothwell, IBM Corp.
  12 *
  13 * This program is free software; you can redistribute it and/or
  14 * modify it under the terms of the GNU General Public License
  15 * as published by the Free Software Foundation; either version
  16 * 2 of the License, or (at your option) any later version.
  17 */
  18#include <linux/types.h>
  19#include <linux/bitops.h>
  20
  21#include <asm/prom.h>
  22
  23/* flag descriptions */
  24#define OF_DYNAMIC      1 /* node and properties were allocated via kmalloc */
  25#define OF_DETACHED     2 /* node has been detached from the device tree */
  26
  27#define OF_BAD_ADDR     ((u64)-1)
  28
  29extern struct device_node *of_find_node_by_name(struct device_node *from,
  30        const char *name);
  31#define for_each_node_by_name(dn, name) \
  32        for (dn = of_find_node_by_name(NULL, name); dn; \
  33             dn = of_find_node_by_name(dn, name))
  34extern struct device_node *of_find_node_by_type(struct device_node *from,
  35        const char *type);
  36#define for_each_node_by_type(dn, type) \
  37        for (dn = of_find_node_by_type(NULL, type); dn; \
  38             dn = of_find_node_by_type(dn, type))
  39extern struct device_node *of_find_compatible_node(struct device_node *from,
  40        const char *type, const char *compat);
  41#define for_each_compatible_node(dn, type, compatible) \
  42        for (dn = of_find_compatible_node(NULL, type, compatible); dn; \
  43             dn = of_find_compatible_node(dn, type, compatible))
  44extern struct device_node *of_find_node_by_path(const char *path);
  45extern struct device_node *of_find_node_by_phandle(phandle handle);
  46extern struct device_node *of_get_parent(const struct device_node *node);
  47extern struct device_node *of_get_next_child(const struct device_node *node,
  48                                             struct device_node *prev);
  49extern struct property *of_find_property(const struct device_node *np,
  50                                         const char *name,
  51                                         int *lenp);
  52extern int of_device_is_compatible(const struct device_node *device,
  53                                   const char *);
  54extern const void *of_get_property(const struct device_node *node,
  55                                const char *name,
  56                                int *lenp);
  57extern int of_n_addr_cells(struct device_node *np);
  58extern int of_n_size_cells(struct device_node *np);
  59
  60#endif /* _LINUX_OF_H */
  61