drivers/of/of_private.h

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 #ifndef _LINUX_OF_PRIVATE_H
   3 #define _LINUX_OF_PRIVATE_H
   4 /*
   5  * Private symbols used by OF support code
   6  *
   7  * Paul Mackerras       August 1996.
   8  * Copyright (C) 1996-2005 Paul Mackerras.
   9  */
  10
  11 /**
  12  * struct alias_prop - Alias property in 'aliases' node
  13  * @link:       List node to link the structure in aliases_lookup list
  14  * @alias:      Alias property name
  15  * @np:         Pointer to device_node that the alias stands for
  16  * @id:         Index value from end of alias name
  17  * @stem:       Alias string without the index
  18  *
  19  * The structure represents one alias property of 'aliases' node as
  20  * an entry in aliases_lookup list.
  21  */
  22 struct alias_prop {
  23         struct list_head link;
  24         const char *alias;
  25         struct device_node *np;
  26         int id;
  27         char stem[0];
  28 };
  29
  30 extern struct mutex of_mutex;
  31 extern struct list_head aliases_lookup;
  32 extern struct kset *of_kset;
  33
  34 #if defined(CONFIG_OF_DYNAMIC)
  35 extern int of_property_notify(int action, struct device_node *np,
  36                               struct property *prop, struct property *old_prop);
  37 extern void of_node_release(struct kobject *kobj);
  38 extern int __of_changeset_apply_entries(struct of_changeset *ocs,
  39                                         int *ret_revert);
  40 extern int __of_changeset_apply_notify(struct of_changeset *ocs);
  41 extern int __of_changeset_revert_entries(struct of_changeset *ocs,
  42                                          int *ret_apply);
  43 extern int __of_changeset_revert_notify(struct of_changeset *ocs);
  44 #else /* CONFIG_OF_DYNAMIC */
  45 static inline int of_property_notify(int action, struct device_node *np,
  46                                      struct property *prop, struct property *old_prop)
  47 {
  48         return 0;
  49 }
  50 #endif /* CONFIG_OF_DYNAMIC */
  51
  52 #if defined(CONFIG_OF_KOBJ)
  53 int of_node_is_attached(struct device_node *node);
  54 int __of_add_property_sysfs(struct device_node *np, struct property *pp);
  55 void __of_remove_property_sysfs(struct device_node *np, struct property *prop);
  56 void __of_update_property_sysfs(struct device_node *np, struct property *newprop,
  57                 struct property *oldprop);
  58 int __of_attach_node_sysfs(struct device_node *np);
  59 void __of_detach_node_sysfs(struct device_node *np);
  60 #else
  61 static inline int __of_add_property_sysfs(struct device_node *np, struct property *pp)
  62 {
  63         return 0;
  64 }
  65 static inline void __of_remove_property_sysfs(struct device_node *np, struct property *prop) {}
  66 static inline void __of_update_property_sysfs(struct device_node *np,
  67                 struct property *newprop, struct property *oldprop) {}
  68 static inline int __of_attach_node_sysfs(struct device_node *np)
  69 {
  70         return 0;
  71 }
  72 static inline void __of_detach_node_sysfs(struct device_node *np) {}
  73 #endif
  74
  75 #if defined(CONFIG_OF_RESOLVE)
  76 int of_resolve_phandles(struct device_node *tree);
  77 #endif
  78
  79 #if defined(CONFIG_OF_OVERLAY)
  80 void of_overlay_mutex_lock(void);
  81 void of_overlay_mutex_unlock(void);
  82 #else
  83 static inline void of_overlay_mutex_lock(void) {};
  84 static inline void of_overlay_mutex_unlock(void) {};
  85 #endif
  86
  87 #if defined(CONFIG_OF_UNITTEST) && defined(CONFIG_OF_OVERLAY)
  88 extern void __init unittest_unflatten_overlay_base(void);
  89 #else
  90 static inline void unittest_unflatten_overlay_base(void) {};
  91 #endif
  92
  93 extern void *__unflatten_device_tree(const void *blob,
  94                               struct device_node *dad,
  95                               struct device_node **mynodes,
  96                               void *(*dt_alloc)(u64 size, u64 align),
  97                               bool detached);
  98
  99 /**
 100  * General utilities for working with live trees.
 101  *
 102  * All functions with two leading underscores operate
 103  * without taking node references, so you either have to
 104  * own the devtree lock or work on detached trees only.
 105  */
 106 struct property *__of_prop_dup(const struct property *prop, gfp_t allocflags);
 107 __printf(2, 3) struct device_node *__of_node_dup(const struct device_node *np, const char *fmt, ...);
 108
 109 struct device_node *__of_find_node_by_path(struct device_node *parent,
 110                                                 const char *path);
 111 struct device_node *__of_find_node_by_full_path(struct device_node *node,
 112                                                 const char *path);
 113
 114 extern const void *__of_get_property(const struct device_node *np,
 115                                      const char *name, int *lenp);
 116 extern int __of_add_property(struct device_node *np, struct property *prop);
 117 extern int __of_add_property_sysfs(struct device_node *np,
 118                 struct property *prop);
 119 extern int __of_remove_property(struct device_node *np, struct property *prop);
 120 extern void __of_remove_property_sysfs(struct device_node *np,
 121                 struct property *prop);
 122 extern int __of_update_property(struct device_node *np,
 123                 struct property *newprop, struct property **oldprop);
 124 extern void __of_update_property_sysfs(struct device_node *np,
 125                 struct property *newprop, struct property *oldprop);
 126
 127 extern int __of_attach_node_sysfs(struct device_node *np);
 128 extern void __of_detach_node(struct device_node *np);
 129 extern void __of_detach_node_sysfs(struct device_node *np);
 130
 131 extern void __of_sysfs_remove_bin_file(struct device_node *np,
 132                                        struct property *prop);
 133
 134 /* iterators for transactions, used for overlays */
 135 /* forward iterator */
 136 #define for_each_transaction_entry(_oft, _te) \
 137         list_for_each_entry(_te, &(_oft)->te_list, node)
 138
 139 /* reverse iterator */
 140 #define for_each_transaction_entry_reverse(_oft, _te) \
 141         list_for_each_entry_reverse(_te, &(_oft)->te_list, node)
 142
 143 #endif /* _LINUX_OF_PRIVATE_H */