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
  29 extern 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))
  34 extern 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))
  39 extern 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))
  44 extern struct device_node *of_find_node_by_path(const char *path);
  45 extern struct device_node *of_find_node_by_phandle(phandle handle);
  46 extern struct device_node *of_get_parent(const struct device_node *node);
  47 extern struct device_node *of_get_next_child(const struct device_node *node,
  48                                              struct device_node *prev);
  49 extern struct property *of_find_property(const struct device_node *np,
  50                                          const char *name,
  51                                          int *lenp);
  52 extern int of_device_is_compatible(const struct device_node *device,
  53                                    const char *);
  54 extern const void *of_get_property(const struct device_node *node,
  55                                 const char *name,
  56                                 int *lenp);
  57 extern int of_n_addr_cells(struct device_node *np);
  58 extern int of_n_size_cells(struct device_node *np);
  59
  60 #endif /* _LINUX_OF_H */