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 #if defined(CONFIG_OF_DYNAMIC)
  39 extern int of_property_notify(int action, struct device_node *np,
  40                               struct property *prop, struct property *old_prop);
  41 extern void of_node_release(struct kobject *kobj);
  42 extern int __of_changeset_apply_entries(struct of_changeset *ocs,
  43                                         int *ret_revert);
  44 extern int __of_changeset_apply_notify(struct of_changeset *ocs);
  45 extern int __of_changeset_revert_entries(struct of_changeset *ocs,
  46                                          int *ret_apply);
  47 extern int __of_changeset_revert_notify(struct of_changeset *ocs);
  48 #else /* CONFIG_OF_DYNAMIC */
  49 static inline int of_property_notify(int action, struct device_node *np,
  50                                      struct property *prop, struct property *old_prop)
  51 {
  52         return 0;
  53 }
  54 #endif /* CONFIG_OF_DYNAMIC */
  55
  56 #if defined(CONFIG_OF_KOBJ)
  57 int of_node_is_attached(struct device_node *node);
  58 int __of_add_property_sysfs(struct device_node *np, struct property *pp);
  59 void __of_remove_property_sysfs(struct device_node *np, struct property *prop);
  60 void __of_update_property_sysfs(struct device_node *np, struct property *newprop,
  61                 struct property *oldprop);
  62 int __of_attach_node_sysfs(struct device_node *np);
  63 void __of_detach_node_sysfs(struct device_node *np);
  64 #else
  65 static inline int __of_add_property_sysfs(struct device_node *np, struct property *pp)
  66 {
  67         return 0;
  68 }
  69 static inline void __of_remove_property_sysfs(struct device_node *np, struct property *prop) {}
  70 static inline void __of_update_property_sysfs(struct device_node *np,
  71                 struct property *newprop, struct property *oldprop) {}
  72 static inline int __of_attach_node_sysfs(struct device_node *np)
  73 {
  74         return 0;
  75 }
  76 static inline void __of_detach_node_sysfs(struct device_node *np) {}
  77 #endif
  78
  79 #if defined(CONFIG_OF_RESOLVE)
  80 int of_resolve_phandles(struct device_node *tree);
  81 #endif
  82
  83 #if defined(CONFIG_OF_OVERLAY)
  84 void of_overlay_mutex_lock(void);
  85 void of_overlay_mutex_unlock(void);
  86 #else
  87 static inline void of_overlay_mutex_lock(void) {};
  88 static inline void of_overlay_mutex_unlock(void) {};
  89 #endif
  90
  91 #if defined(CONFIG_OF_UNITTEST) && defined(CONFIG_OF_OVERLAY)
  92 extern void __init unittest_unflatten_overlay_base(void);
  93 #else
  94 static inline void unittest_unflatten_overlay_base(void) {};
  95 #endif
  96
  97 extern void *__unflatten_device_tree(const void *blob,
  98                               struct device_node *dad,
  99                               struct device_node **mynodes,
 100                               void *(*dt_alloc)(u64 size, u64 align),
 101                               bool detached);
 102
 103 /**
 104  * General utilities for working with live trees.
 105  *
 106  * All functions with two leading underscores operate
 107  * without taking node references, so you either have to
 108  * own the devtree lock or work on detached trees only.
 109  */
 110 struct property *__of_prop_dup(const struct property *prop, gfp_t allocflags);
 111 __printf(2, 3) struct device_node *__of_node_dup(const struct device_node *np, const char *fmt, ...);
 112
 113 struct device_node *__of_find_node_by_path(struct device_node *parent,
 114                                                 const char *path);
 115 struct device_node *__of_find_node_by_full_path(struct device_node *node,
 116                                                 const char *path);
 117
 118 extern const void *__of_get_property(const struct device_node *np,
 119                                      const char *name, int *lenp);
 120 extern int __of_add_property(struct device_node *np, struct property *prop);
 121 extern int __of_add_property_sysfs(struct device_node *np,
 122                 struct property *prop);
 123 extern int __of_remove_property(struct device_node *np, struct property *prop);
 124 extern void __of_remove_property_sysfs(struct device_node *np,
 125                 struct property *prop);
 126 extern int __of_update_property(struct device_node *np,
 127                 struct property *newprop, struct property **oldprop);
 128 extern void __of_update_property_sysfs(struct device_node *np,
 129                 struct property *newprop, struct property *oldprop);
 130
 131 extern int __of_attach_node_sysfs(struct device_node *np);
 132 extern void __of_detach_node(struct device_node *np);
 133 extern void __of_detach_node_sysfs(struct device_node *np);
 134
 135 extern void __of_sysfs_remove_bin_file(struct device_node *np,
 136                                        struct property *prop);
 137
 138 /* iterators for transactions, used for overlays */
 139 /* forward iterator */
 140 #define for_each_transaction_entry(_oft, _te) \
 141         list_for_each_entry(_te, &(_oft)->te_list, node)
 142
 143 /* reverse iterator */
 144 #define for_each_transaction_entry_reverse(_oft, _te) \
 145         list_for_each_entry_reverse(_te, &(_oft)->te_list, node)
 146
 147 #endif /* _LINUX_OF_PRIVATE_H */