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Linux kernel mirror (for testing)
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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 */
22struct 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
30extern struct mutex of_mutex;
31extern struct list_head aliases_lookup;
32extern struct kset *of_kset;
33
34#if defined(CONFIG_OF_DYNAMIC)
35extern int of_property_notify(int action, struct device_node *np,
36 struct property *prop, struct property *old_prop);
37extern void of_node_release(struct kobject *kobj);
38extern int __of_changeset_apply_entries(struct of_changeset *ocs,
39 int *ret_revert);
40extern int __of_changeset_apply_notify(struct of_changeset *ocs);
41extern int __of_changeset_revert_entries(struct of_changeset *ocs,
42 int *ret_apply);
43extern int __of_changeset_revert_notify(struct of_changeset *ocs);
44#else /* CONFIG_OF_DYNAMIC */
45static 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)
53int of_node_is_attached(struct device_node *node);
54int __of_add_property_sysfs(struct device_node *np, struct property *pp);
55void __of_remove_property_sysfs(struct device_node *np, struct property *prop);
56void __of_update_property_sysfs(struct device_node *np, struct property *newprop,
57 struct property *oldprop);
58int __of_attach_node_sysfs(struct device_node *np);
59void __of_detach_node_sysfs(struct device_node *np);
60#else
61static inline int __of_add_property_sysfs(struct device_node *np, struct property *pp)
62{
63 return 0;
64}
65static inline void __of_remove_property_sysfs(struct device_node *np, struct property *prop) {}
66static inline void __of_update_property_sysfs(struct device_node *np,
67 struct property *newprop, struct property *oldprop) {}
68static inline int __of_attach_node_sysfs(struct device_node *np)
69{
70 return 0;
71}
72static inline void __of_detach_node_sysfs(struct device_node *np) {}
73#endif
74
75#if defined(CONFIG_OF_RESOLVE)
76int of_resolve_phandles(struct device_node *tree);
77#endif
78
79#if defined(CONFIG_OF_OVERLAY)
80void of_overlay_mutex_lock(void);
81void of_overlay_mutex_unlock(void);
82#else
83static inline void of_overlay_mutex_lock(void) {};
84static inline void of_overlay_mutex_unlock(void) {};
85#endif
86
87#if defined(CONFIG_OF_UNITTEST) && defined(CONFIG_OF_OVERLAY)
88extern void __init unittest_unflatten_overlay_base(void);
89#else
90static inline void unittest_unflatten_overlay_base(void) {};
91#endif
92
93extern 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 */
106struct property *__of_prop_dup(const struct property *prop, gfp_t allocflags);
107struct device_node *__of_node_dup(const struct device_node *np,
108 const char *full_name);
109
110struct device_node *__of_find_node_by_path(struct device_node *parent,
111 const char *path);
112struct device_node *__of_find_node_by_full_path(struct device_node *node,
113 const char *path);
114
115extern const void *__of_get_property(const struct device_node *np,
116 const char *name, int *lenp);
117extern int __of_add_property(struct device_node *np, struct property *prop);
118extern int __of_add_property_sysfs(struct device_node *np,
119 struct property *prop);
120extern int __of_remove_property(struct device_node *np, struct property *prop);
121extern void __of_remove_property_sysfs(struct device_node *np,
122 struct property *prop);
123extern int __of_update_property(struct device_node *np,
124 struct property *newprop, struct property **oldprop);
125extern void __of_update_property_sysfs(struct device_node *np,
126 struct property *newprop, struct property *oldprop);
127
128extern int __of_attach_node_sysfs(struct device_node *np);
129extern void __of_detach_node(struct device_node *np);
130extern void __of_detach_node_sysfs(struct device_node *np);
131
132extern void __of_sysfs_remove_bin_file(struct device_node *np,
133 struct property *prop);
134
135/* illegal phandle value (set when unresolved) */
136#define OF_PHANDLE_ILLEGAL 0xdeadbeef
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 */