drivers/of/of_private.h

   1 #ifndef _LINUX_OF_PRIVATE_H
   2 #define _LINUX_OF_PRIVATE_H
   3 /*
   4  * Private symbols used by OF support code
   5  *
   6  * Paul Mackerras       August 1996.
   7  * Copyright (C) 1996-2005 Paul Mackerras.
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License
  11  * as published by the Free Software Foundation; either version
  12  * 2 of the License, or (at your option) any later version.
  13  */
  14
  15 /**
  16  * struct alias_prop - Alias property in 'aliases' node
  17  * @link:       List node to link the structure in aliases_lookup list
  18  * @alias:      Alias property name
  19  * @np:         Pointer to device_node that the alias stands for
  20  * @id:         Index value from end of alias name
  21  * @stem:       Alias string without the index
  22  *
  23  * The structure represents one alias property of 'aliases' node as
  24  * an entry in aliases_lookup list.
  25  */
  26 struct alias_prop {
  27         struct list_head link;
  28         const char *alias;
  29         struct device_node *np;
  30         int id;
  31         char stem[0];
  32 };
  33
  34 extern struct mutex of_mutex;
  35 extern struct list_head aliases_lookup;
  36 extern struct kset *of_kset;
  37
  38
  39 static inline struct device_node *kobj_to_device_node(struct kobject *kobj)
  40 {
  41         return container_of(kobj, struct device_node, kobj);
  42 }
  43
  44 #if defined(CONFIG_OF_DYNAMIC)
  45 extern int of_property_notify(int action, struct device_node *np,
  46                               struct property *prop, struct property *old_prop);
  47 extern void of_node_release(struct kobject *kobj);
  48 extern int __of_changeset_apply(struct of_changeset *ocs);
  49 extern int __of_changeset_revert(struct of_changeset *ocs);
  50 #else /* CONFIG_OF_DYNAMIC */
  51 static inline int of_property_notify(int action, struct device_node *np,
  52                                      struct property *prop, struct property *old_prop)
  53 {
  54         return 0;
  55 }
  56 #endif /* CONFIG_OF_DYNAMIC */
  57
  58 #if defined(CONFIG_OF_UNITTEST) && defined(CONFIG_OF_OVERLAY)
  59 extern void __init unittest_unflatten_overlay_base(void);
  60 #else
  61 static inline void unittest_unflatten_overlay_base(void) {};
  62 #endif
  63
  64 extern void *__unflatten_device_tree(const void *blob,
  65                               struct device_node *dad,
  66                               struct device_node **mynodes,
  67                               void *(*dt_alloc)(u64 size, u64 align),
  68                               bool detached);
  69
  70 /**
  71  * General utilities for working with live trees.
  72  *
  73  * All functions with two leading underscores operate
  74  * without taking node references, so you either have to
  75  * own the devtree lock or work on detached trees only.
  76  */
  77 struct property *__of_prop_dup(const struct property *prop, gfp_t allocflags);
  78 __printf(2, 3) struct device_node *__of_node_dup(const struct device_node *np, const char *fmt, ...);
  79
  80 struct device_node *__of_find_node_by_full_path(struct device_node *node,
  81                                                 const char *path);
  82
  83 extern const void *__of_get_property(const struct device_node *np,
  84                                      const char *name, int *lenp);
  85 extern int __of_add_property(struct device_node *np, struct property *prop);
  86 extern int __of_add_property_sysfs(struct device_node *np,
  87                 struct property *prop);
  88 extern int __of_remove_property(struct device_node *np, struct property *prop);
  89 extern void __of_remove_property_sysfs(struct device_node *np,
  90                 struct property *prop);
  91 extern int __of_update_property(struct device_node *np,
  92                 struct property *newprop, struct property **oldprop);
  93 extern void __of_update_property_sysfs(struct device_node *np,
  94                 struct property *newprop, struct property *oldprop);
  95
  96 extern int __of_attach_node_sysfs(struct device_node *np);
  97 extern void __of_detach_node(struct device_node *np);
  98 extern void __of_detach_node_sysfs(struct device_node *np);
  99
 100 extern void __of_sysfs_remove_bin_file(struct device_node *np,
 101                                        struct property *prop);
 102
 103 /* iterators for transactions, used for overlays */
 104 /* forward iterator */
 105 #define for_each_transaction_entry(_oft, _te) \
 106         list_for_each_entry(_te, &(_oft)->te_list, node)
 107
 108 /* reverse iterator */
 109 #define for_each_transaction_entry_reverse(_oft, _te) \
 110         list_for_each_entry_reverse(_te, &(_oft)->te_list, node)
 111
 112 #endif /* _LINUX_OF_PRIVATE_H */