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 struct device_node *__of_node_dup(const struct device_node *np, 108 const char *full_name); 109 110 struct device_node *__of_find_node_by_path(struct device_node *parent, 111 const char *path); 112 struct device_node *__of_find_node_by_full_path(struct device_node *node, 113 const char *path); 114 115 extern const void *__of_get_property(const struct device_node *np, 116 const char *name, int *lenp); 117 extern int __of_add_property(struct device_node *np, struct property *prop); 118 extern int __of_add_property_sysfs(struct device_node *np, 119 struct property *prop); 120 extern int __of_remove_property(struct device_node *np, struct property *prop); 121 extern void __of_remove_property_sysfs(struct device_node *np, 122 struct property *prop); 123 extern int __of_update_property(struct device_node *np, 124 struct property *newprop, struct property **oldprop); 125 extern void __of_update_property_sysfs(struct device_node *np, 126 struct property *newprop, struct property *oldprop); 127 128 extern int __of_attach_node_sysfs(struct device_node *np); 129 extern void __of_detach_node(struct device_node *np); 130 extern void __of_detach_node_sysfs(struct device_node *np); 131 132 extern 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 */ 148