4 * Definitions for talking to the Open Firmware PROM on
5 * Power Macintosh and other computers.
7 * Copyright (C) 1996-2005 Paul Mackerras.
9 * Updates for PPC64 by Peter Bergner & David Engebretsen, IBM Corp.
10 * Updates for SPARC64 by David S. Miller
11 * Derived from PowerPC and Sparc prom.h files by Stephen Rothwell, IBM Corp.
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License
15 * as published by the Free Software Foundation; either version
16 * 2 of the License, or (at your option) any later version.
18 #include <linux/types.h>
19 #include <linux/bitops.h>
20 #include <linux/errno.h>
21 #include <linux/kobject.h>
22 #include <linux/mod_devicetable.h>
23 #include <linux/spinlock.h>
24 #include <linux/topology.h>
25 #include <linux/notifier.h>
26 #include <linux/list.h>
28 #include <asm/byteorder.h>
29 #include <asm/errno.h>
38 struct property *next;
40 unsigned int unique_id;
41 struct bin_attribute attr;
44 #if defined(CONFIG_SPARC)
45 struct of_irq_controller;
52 const char *full_name;
54 struct property *properties;
55 struct property *deadprops; /* removed properties */
56 struct device_node *parent;
57 struct device_node *child;
58 struct device_node *sibling;
62 #if defined(CONFIG_SPARC)
63 const char *path_component_name;
64 unsigned int unique_id;
65 struct of_irq_controller *irq_trans;
69 #define MAX_PHANDLE_ARGS 16
70 struct of_phandle_args {
71 struct device_node *np;
73 uint32_t args[MAX_PHANDLE_ARGS];
76 struct of_reconfig_data {
77 struct device_node *dn;
78 struct property *prop;
79 struct property *old_prop;
82 /* initialize a node */
83 extern struct kobj_type of_node_ktype;
84 static inline void of_node_init(struct device_node *node)
86 kobject_init(&node->kobj, &of_node_ktype);
89 /* true when node is initialized */
90 static inline int of_node_is_initialized(struct device_node *node)
92 return node && node->kobj.state_initialized;
95 /* true when node is attached (i.e. present on sysfs) */
96 static inline int of_node_is_attached(struct device_node *node)
98 return node && node->kobj.state_in_sysfs;
101 #ifdef CONFIG_OF_DYNAMIC
102 extern struct device_node *of_node_get(struct device_node *node);
103 extern void of_node_put(struct device_node *node);
104 #else /* CONFIG_OF_DYNAMIC */
105 /* Dummy ref counting routines - to be implemented later */
106 static inline struct device_node *of_node_get(struct device_node *node)
110 static inline void of_node_put(struct device_node *node) { }
111 #endif /* !CONFIG_OF_DYNAMIC */
115 /* Pointer for first entry in chain of all nodes. */
116 extern struct device_node *of_root;
117 extern struct device_node *of_chosen;
118 extern struct device_node *of_aliases;
119 extern struct device_node *of_stdout;
120 extern raw_spinlock_t devtree_lock;
122 static inline bool of_have_populated_dt(void)
124 return of_root != NULL;
127 static inline bool of_node_is_root(const struct device_node *node)
129 return node && (node->parent == NULL);
132 static inline int of_node_check_flag(struct device_node *n, unsigned long flag)
134 return test_bit(flag, &n->_flags);
137 static inline int of_node_test_and_set_flag(struct device_node *n,
140 return test_and_set_bit(flag, &n->_flags);
143 static inline void of_node_set_flag(struct device_node *n, unsigned long flag)
145 set_bit(flag, &n->_flags);
148 static inline void of_node_clear_flag(struct device_node *n, unsigned long flag)
150 clear_bit(flag, &n->_flags);
153 static inline int of_property_check_flag(struct property *p, unsigned long flag)
155 return test_bit(flag, &p->_flags);
158 static inline void of_property_set_flag(struct property *p, unsigned long flag)
160 set_bit(flag, &p->_flags);
163 static inline void of_property_clear_flag(struct property *p, unsigned long flag)
165 clear_bit(flag, &p->_flags);
168 extern struct device_node *__of_find_all_nodes(struct device_node *prev);
169 extern struct device_node *of_find_all_nodes(struct device_node *prev);
172 * OF address retrieval & translation
175 /* Helper to read a big number; size is in cells (not bytes) */
176 static inline u64 of_read_number(const __be32 *cell, int size)
180 r = (r << 32) | be32_to_cpu(*(cell++));
184 /* Like of_read_number, but we want an unsigned long result */
185 static inline unsigned long of_read_ulong(const __be32 *cell, int size)
187 /* toss away upper bits if unsigned long is smaller than u64 */
188 return of_read_number(cell, size);
191 #if defined(CONFIG_SPARC)
192 #include <asm/prom.h>
195 /* Default #address and #size cells. Allow arch asm/prom.h to override */
196 #if !defined(OF_ROOT_NODE_ADDR_CELLS_DEFAULT)
197 #define OF_ROOT_NODE_ADDR_CELLS_DEFAULT 1
198 #define OF_ROOT_NODE_SIZE_CELLS_DEFAULT 1
201 /* Default string compare functions, Allow arch asm/prom.h to override */
202 #if !defined(of_compat_cmp)
203 #define of_compat_cmp(s1, s2, l) strcasecmp((s1), (s2))
204 #define of_prop_cmp(s1, s2) strcmp((s1), (s2))
205 #define of_node_cmp(s1, s2) strcasecmp((s1), (s2))
208 /* flag descriptions */
209 #define OF_DYNAMIC 1 /* node and properties were allocated via kmalloc */
210 #define OF_DETACHED 2 /* node has been detached from the device tree */
211 #define OF_POPULATED 3 /* device already created for the node */
212 #define OF_POPULATED_BUS 4 /* of_platform_populate recursed to children of this node */
214 #define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags)
215 #define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags)
217 #define OF_BAD_ADDR ((u64)-1)
219 static inline const char *of_node_full_name(const struct device_node *np)
221 return np ? np->full_name : "<no-node>";
224 #define for_each_of_allnodes_from(from, dn) \
225 for (dn = __of_find_all_nodes(from); dn; dn = __of_find_all_nodes(dn))
226 #define for_each_of_allnodes(dn) for_each_of_allnodes_from(NULL, dn)
227 extern struct device_node *of_find_node_by_name(struct device_node *from,
229 extern struct device_node *of_find_node_by_type(struct device_node *from,
231 extern struct device_node *of_find_compatible_node(struct device_node *from,
232 const char *type, const char *compat);
233 extern struct device_node *of_find_matching_node_and_match(
234 struct device_node *from,
235 const struct of_device_id *matches,
236 const struct of_device_id **match);
238 extern struct device_node *of_find_node_opts_by_path(const char *path,
240 static inline struct device_node *of_find_node_by_path(const char *path)
242 return of_find_node_opts_by_path(path, NULL);
245 extern struct device_node *of_find_node_by_phandle(phandle handle);
246 extern struct device_node *of_get_parent(const struct device_node *node);
247 extern struct device_node *of_get_next_parent(struct device_node *node);
248 extern struct device_node *of_get_next_child(const struct device_node *node,
249 struct device_node *prev);
250 extern struct device_node *of_get_next_available_child(
251 const struct device_node *node, struct device_node *prev);
253 extern struct device_node *of_get_child_by_name(const struct device_node *node,
257 extern struct device_node *of_find_next_cache_node(const struct device_node *);
258 extern struct device_node *of_find_node_with_property(
259 struct device_node *from, const char *prop_name);
261 extern struct property *of_find_property(const struct device_node *np,
264 extern int of_property_count_elems_of_size(const struct device_node *np,
265 const char *propname, int elem_size);
266 extern int of_property_read_u32_index(const struct device_node *np,
267 const char *propname,
268 u32 index, u32 *out_value);
269 extern int of_property_read_u8_array(const struct device_node *np,
270 const char *propname, u8 *out_values, size_t sz);
271 extern int of_property_read_u16_array(const struct device_node *np,
272 const char *propname, u16 *out_values, size_t sz);
273 extern int of_property_read_u32_array(const struct device_node *np,
274 const char *propname,
277 extern int of_property_read_u64(const struct device_node *np,
278 const char *propname, u64 *out_value);
280 extern int of_property_read_string(struct device_node *np,
281 const char *propname,
282 const char **out_string);
283 extern int of_property_match_string(struct device_node *np,
284 const char *propname,
286 extern int of_property_read_string_helper(struct device_node *np,
287 const char *propname,
288 const char **out_strs, size_t sz, int index);
289 extern int of_device_is_compatible(const struct device_node *device,
291 extern bool of_device_is_available(const struct device_node *device);
292 extern const void *of_get_property(const struct device_node *node,
295 extern struct device_node *of_get_cpu_node(int cpu, unsigned int *thread);
296 #define for_each_property_of_node(dn, pp) \
297 for (pp = dn->properties; pp != NULL; pp = pp->next)
299 extern int of_n_addr_cells(struct device_node *np);
300 extern int of_n_size_cells(struct device_node *np);
301 extern const struct of_device_id *of_match_node(
302 const struct of_device_id *matches, const struct device_node *node);
303 extern int of_modalias_node(struct device_node *node, char *modalias, int len);
304 extern void of_print_phandle_args(const char *msg, const struct of_phandle_args *args);
305 extern struct device_node *of_parse_phandle(const struct device_node *np,
306 const char *phandle_name,
308 extern int of_parse_phandle_with_args(const struct device_node *np,
309 const char *list_name, const char *cells_name, int index,
310 struct of_phandle_args *out_args);
311 extern int of_parse_phandle_with_fixed_args(const struct device_node *np,
312 const char *list_name, int cells_count, int index,
313 struct of_phandle_args *out_args);
314 extern int of_count_phandle_with_args(const struct device_node *np,
315 const char *list_name, const char *cells_name);
317 extern void of_alias_scan(void * (*dt_alloc)(u64 size, u64 align));
318 extern int of_alias_get_id(struct device_node *np, const char *stem);
320 extern int of_machine_is_compatible(const char *compat);
322 extern int of_add_property(struct device_node *np, struct property *prop);
323 extern int of_remove_property(struct device_node *np, struct property *prop);
324 extern int of_update_property(struct device_node *np, struct property *newprop);
326 /* For updating the device tree at runtime */
327 #define OF_RECONFIG_ATTACH_NODE 0x0001
328 #define OF_RECONFIG_DETACH_NODE 0x0002
329 #define OF_RECONFIG_ADD_PROPERTY 0x0003
330 #define OF_RECONFIG_REMOVE_PROPERTY 0x0004
331 #define OF_RECONFIG_UPDATE_PROPERTY 0x0005
333 extern int of_attach_node(struct device_node *);
334 extern int of_detach_node(struct device_node *);
336 #define of_match_ptr(_ptr) (_ptr)
339 * struct property *prop;
343 * of_property_for_each_u32(np, "propname", prop, p, u)
344 * printk("U32 value: %x\n", u);
346 const __be32 *of_prop_next_u32(struct property *prop, const __be32 *cur,
349 * struct property *prop;
352 * of_property_for_each_string(np, "propname", prop, s)
353 * printk("String value: %s\n", s);
355 const char *of_prop_next_string(struct property *prop, const char *cur);
357 bool of_console_check(struct device_node *dn, char *name, int index);
359 #else /* CONFIG_OF */
361 static inline const char* of_node_full_name(const struct device_node *np)
366 static inline struct device_node *of_find_node_by_name(struct device_node *from,
372 static inline struct device_node *of_find_node_by_type(struct device_node *from,
378 static inline struct device_node *of_find_matching_node_and_match(
379 struct device_node *from,
380 const struct of_device_id *matches,
381 const struct of_device_id **match)
386 static inline struct device_node *of_find_node_by_path(const char *path)
391 static inline struct device_node *of_find_node_opts_by_path(const char *path,
397 static inline struct device_node *of_get_parent(const struct device_node *node)
402 static inline struct device_node *of_get_next_child(
403 const struct device_node *node, struct device_node *prev)
408 static inline struct device_node *of_get_next_available_child(
409 const struct device_node *node, struct device_node *prev)
414 static inline struct device_node *of_find_node_with_property(
415 struct device_node *from, const char *prop_name)
420 static inline bool of_have_populated_dt(void)
425 static inline struct device_node *of_get_child_by_name(
426 const struct device_node *node,
432 static inline int of_device_is_compatible(const struct device_node *device,
438 static inline bool of_device_is_available(const struct device_node *device)
443 static inline struct property *of_find_property(const struct device_node *np,
450 static inline struct device_node *of_find_compatible_node(
451 struct device_node *from,
458 static inline int of_property_count_elems_of_size(const struct device_node *np,
459 const char *propname, int elem_size)
464 static inline int of_property_read_u32_index(const struct device_node *np,
465 const char *propname, u32 index, u32 *out_value)
470 static inline int of_property_read_u8_array(const struct device_node *np,
471 const char *propname, u8 *out_values, size_t sz)
476 static inline int of_property_read_u16_array(const struct device_node *np,
477 const char *propname, u16 *out_values, size_t sz)
482 static inline int of_property_read_u32_array(const struct device_node *np,
483 const char *propname,
484 u32 *out_values, size_t sz)
489 static inline int of_property_read_string(struct device_node *np,
490 const char *propname,
491 const char **out_string)
496 static inline int of_property_read_string_helper(struct device_node *np,
497 const char *propname,
498 const char **out_strs, size_t sz, int index)
503 static inline const void *of_get_property(const struct device_node *node,
510 static inline struct device_node *of_get_cpu_node(int cpu,
511 unsigned int *thread)
516 static inline int of_property_read_u64(const struct device_node *np,
517 const char *propname, u64 *out_value)
522 static inline int of_property_match_string(struct device_node *np,
523 const char *propname,
529 static inline struct device_node *of_parse_phandle(const struct device_node *np,
530 const char *phandle_name,
536 static inline int of_parse_phandle_with_args(struct device_node *np,
537 const char *list_name,
538 const char *cells_name,
540 struct of_phandle_args *out_args)
545 static inline int of_parse_phandle_with_fixed_args(const struct device_node *np,
546 const char *list_name, int cells_count, int index,
547 struct of_phandle_args *out_args)
552 static inline int of_count_phandle_with_args(struct device_node *np,
553 const char *list_name,
554 const char *cells_name)
559 static inline int of_alias_get_id(struct device_node *np, const char *stem)
564 static inline int of_machine_is_compatible(const char *compat)
569 static inline bool of_console_check(const struct device_node *dn, const char *name, int index)
574 static inline const __be32 *of_prop_next_u32(struct property *prop,
575 const __be32 *cur, u32 *pu)
580 static inline const char *of_prop_next_string(struct property *prop,
586 #define of_match_ptr(_ptr) NULL
587 #define of_match_node(_matches, _node) NULL
588 #endif /* CONFIG_OF */
590 #if defined(CONFIG_OF) && defined(CONFIG_NUMA)
591 extern int of_node_to_nid(struct device_node *np);
593 static inline int of_node_to_nid(struct device_node *device) { return 0; }
596 static inline struct device_node *of_find_matching_node(
597 struct device_node *from,
598 const struct of_device_id *matches)
600 return of_find_matching_node_and_match(from, matches, NULL);
604 * of_property_count_u8_elems - Count the number of u8 elements in a property
606 * @np: device node from which the property value is to be read.
607 * @propname: name of the property to be searched.
609 * Search for a property in a device node and count the number of u8 elements
610 * in it. Returns number of elements on sucess, -EINVAL if the property does
611 * not exist or its length does not match a multiple of u8 and -ENODATA if the
612 * property does not have a value.
614 static inline int of_property_count_u8_elems(const struct device_node *np,
615 const char *propname)
617 return of_property_count_elems_of_size(np, propname, sizeof(u8));
621 * of_property_count_u16_elems - Count the number of u16 elements in a property
623 * @np: device node from which the property value is to be read.
624 * @propname: name of the property to be searched.
626 * Search for a property in a device node and count the number of u16 elements
627 * in it. Returns number of elements on sucess, -EINVAL if the property does
628 * not exist or its length does not match a multiple of u16 and -ENODATA if the
629 * property does not have a value.
631 static inline int of_property_count_u16_elems(const struct device_node *np,
632 const char *propname)
634 return of_property_count_elems_of_size(np, propname, sizeof(u16));
638 * of_property_count_u32_elems - Count the number of u32 elements in a property
640 * @np: device node from which the property value is to be read.
641 * @propname: name of the property to be searched.
643 * Search for a property in a device node and count the number of u32 elements
644 * in it. Returns number of elements on sucess, -EINVAL if the property does
645 * not exist or its length does not match a multiple of u32 and -ENODATA if the
646 * property does not have a value.
648 static inline int of_property_count_u32_elems(const struct device_node *np,
649 const char *propname)
651 return of_property_count_elems_of_size(np, propname, sizeof(u32));
655 * of_property_count_u64_elems - Count the number of u64 elements in a property
657 * @np: device node from which the property value is to be read.
658 * @propname: name of the property to be searched.
660 * Search for a property in a device node and count the number of u64 elements
661 * in it. Returns number of elements on sucess, -EINVAL if the property does
662 * not exist or its length does not match a multiple of u64 and -ENODATA if the
663 * property does not have a value.
665 static inline int of_property_count_u64_elems(const struct device_node *np,
666 const char *propname)
668 return of_property_count_elems_of_size(np, propname, sizeof(u64));
672 * of_property_read_string_array() - Read an array of strings from a multiple
674 * @np: device node from which the property value is to be read.
675 * @propname: name of the property to be searched.
676 * @out_strs: output array of string pointers.
677 * @sz: number of array elements to read.
679 * Search for a property in a device tree node and retrieve a list of
680 * terminated string values (pointer to data, not a copy) in that property.
682 * If @out_strs is NULL, the number of strings in the property is returned.
684 static inline int of_property_read_string_array(struct device_node *np,
685 const char *propname, const char **out_strs,
688 return of_property_read_string_helper(np, propname, out_strs, sz, 0);
692 * of_property_count_strings() - Find and return the number of strings from a
693 * multiple strings property.
694 * @np: device node from which the property value is to be read.
695 * @propname: name of the property to be searched.
697 * Search for a property in a device tree node and retrieve the number of null
698 * terminated string contain in it. Returns the number of strings on
699 * success, -EINVAL if the property does not exist, -ENODATA if property
700 * does not have a value, and -EILSEQ if the string is not null-terminated
701 * within the length of the property data.
703 static inline int of_property_count_strings(struct device_node *np,
704 const char *propname)
706 return of_property_read_string_helper(np, propname, NULL, 0, 0);
710 * of_property_read_string_index() - Find and read a string from a multiple
712 * @np: device node from which the property value is to be read.
713 * @propname: name of the property to be searched.
714 * @index: index of the string in the list of strings
715 * @out_string: pointer to null terminated return string, modified only if
718 * Search for a property in a device tree node and retrieve a null
719 * terminated string value (pointer to data, not a copy) in the list of strings
720 * contained in that property.
721 * Returns 0 on success, -EINVAL if the property does not exist, -ENODATA if
722 * property does not have a value, and -EILSEQ if the string is not
723 * null-terminated within the length of the property data.
725 * The out_string pointer is modified only if a valid string can be decoded.
727 static inline int of_property_read_string_index(struct device_node *np,
728 const char *propname,
729 int index, const char **output)
731 int rc = of_property_read_string_helper(np, propname, output, 1, index);
732 return rc < 0 ? rc : 0;
736 * of_property_read_bool - Findfrom a property
737 * @np: device node from which the property value is to be read.
738 * @propname: name of the property to be searched.
740 * Search for a property in a device node.
741 * Returns true if the property exist false otherwise.
743 static inline bool of_property_read_bool(const struct device_node *np,
744 const char *propname)
746 struct property *prop = of_find_property(np, propname, NULL);
748 return prop ? true : false;
751 static inline int of_property_read_u8(const struct device_node *np,
752 const char *propname,
755 return of_property_read_u8_array(np, propname, out_value, 1);
758 static inline int of_property_read_u16(const struct device_node *np,
759 const char *propname,
762 return of_property_read_u16_array(np, propname, out_value, 1);
765 static inline int of_property_read_u32(const struct device_node *np,
766 const char *propname,
769 return of_property_read_u32_array(np, propname, out_value, 1);
772 static inline int of_property_read_s32(const struct device_node *np,
773 const char *propname,
776 return of_property_read_u32(np, propname, (u32*) out_value);
779 #define of_property_for_each_u32(np, propname, prop, p, u) \
780 for (prop = of_find_property(np, propname, NULL), \
781 p = of_prop_next_u32(prop, NULL, &u); \
783 p = of_prop_next_u32(prop, p, &u))
785 #define of_property_for_each_string(np, propname, prop, s) \
786 for (prop = of_find_property(np, propname, NULL), \
787 s = of_prop_next_string(prop, NULL); \
789 s = of_prop_next_string(prop, s))
791 #define for_each_node_by_name(dn, name) \
792 for (dn = of_find_node_by_name(NULL, name); dn; \
793 dn = of_find_node_by_name(dn, name))
794 #define for_each_node_by_type(dn, type) \
795 for (dn = of_find_node_by_type(NULL, type); dn; \
796 dn = of_find_node_by_type(dn, type))
797 #define for_each_compatible_node(dn, type, compatible) \
798 for (dn = of_find_compatible_node(NULL, type, compatible); dn; \
799 dn = of_find_compatible_node(dn, type, compatible))
800 #define for_each_matching_node(dn, matches) \
801 for (dn = of_find_matching_node(NULL, matches); dn; \
802 dn = of_find_matching_node(dn, matches))
803 #define for_each_matching_node_and_match(dn, matches, match) \
804 for (dn = of_find_matching_node_and_match(NULL, matches, match); \
805 dn; dn = of_find_matching_node_and_match(dn, matches, match))
807 #define for_each_child_of_node(parent, child) \
808 for (child = of_get_next_child(parent, NULL); child != NULL; \
809 child = of_get_next_child(parent, child))
810 #define for_each_available_child_of_node(parent, child) \
811 for (child = of_get_next_available_child(parent, NULL); child != NULL; \
812 child = of_get_next_available_child(parent, child))
814 #define for_each_node_with_property(dn, prop_name) \
815 for (dn = of_find_node_with_property(NULL, prop_name); dn; \
816 dn = of_find_node_with_property(dn, prop_name))
818 static inline int of_get_child_count(const struct device_node *np)
820 struct device_node *child;
823 for_each_child_of_node(np, child)
829 static inline int of_get_available_child_count(const struct device_node *np)
831 struct device_node *child;
834 for_each_available_child_of_node(np, child)
841 #define _OF_DECLARE(table, name, compat, fn, fn_type) \
842 static const struct of_device_id __of_table_##name \
843 __used __section(__##table##_of_table) \
844 = { .compatible = compat, \
845 .data = (fn == (fn_type)NULL) ? fn : fn }
847 #define _OF_DECLARE(table, name, compat, fn, fn_type) \
848 static const struct of_device_id __of_table_##name \
849 __attribute__((unused)) \
850 = { .compatible = compat, \
851 .data = (fn == (fn_type)NULL) ? fn : fn }
854 typedef int (*of_init_fn_2)(struct device_node *, struct device_node *);
855 typedef void (*of_init_fn_1)(struct device_node *);
857 #define OF_DECLARE_1(table, name, compat, fn) \
858 _OF_DECLARE(table, name, compat, fn, of_init_fn_1)
859 #define OF_DECLARE_2(table, name, compat, fn) \
860 _OF_DECLARE(table, name, compat, fn, of_init_fn_2)
863 * struct of_changeset_entry - Holds a changeset entry
865 * @node: list_head for the log list
866 * @action: notifier action
867 * @np: pointer to the device node affected
868 * @prop: pointer to the property affected
869 * @old_prop: hold a pointer to the original property
871 * Every modification of the device tree during a changeset
872 * is held in a list of of_changeset_entry structures.
873 * That way we can recover from a partial application, or we can
874 * revert the changeset
876 struct of_changeset_entry {
877 struct list_head node;
878 unsigned long action;
879 struct device_node *np;
880 struct property *prop;
881 struct property *old_prop;
885 * struct of_changeset - changeset tracker structure
887 * @entries: list_head for the changeset entries
889 * changesets are a convenient way to apply bulk changes to the
890 * live tree. In case of an error, changes are rolled-back.
891 * changesets live on after initial application, and if not
892 * destroyed after use, they can be reverted in one single call.
894 struct of_changeset {
895 struct list_head entries;
898 enum of_reconfig_change {
899 OF_RECONFIG_NO_CHANGE = 0,
900 OF_RECONFIG_CHANGE_ADD,
901 OF_RECONFIG_CHANGE_REMOVE,
904 #ifdef CONFIG_OF_DYNAMIC
905 extern int of_reconfig_notifier_register(struct notifier_block *);
906 extern int of_reconfig_notifier_unregister(struct notifier_block *);
907 extern int of_reconfig_notify(unsigned long, struct of_reconfig_data *rd);
908 extern int of_reconfig_get_state_change(unsigned long action,
909 struct of_reconfig_data *arg);
911 extern void of_changeset_init(struct of_changeset *ocs);
912 extern void of_changeset_destroy(struct of_changeset *ocs);
913 extern int of_changeset_apply(struct of_changeset *ocs);
914 extern int of_changeset_revert(struct of_changeset *ocs);
915 extern int of_changeset_action(struct of_changeset *ocs,
916 unsigned long action, struct device_node *np,
917 struct property *prop);
919 static inline int of_changeset_attach_node(struct of_changeset *ocs,
920 struct device_node *np)
922 return of_changeset_action(ocs, OF_RECONFIG_ATTACH_NODE, np, NULL);
925 static inline int of_changeset_detach_node(struct of_changeset *ocs,
926 struct device_node *np)
928 return of_changeset_action(ocs, OF_RECONFIG_DETACH_NODE, np, NULL);
931 static inline int of_changeset_add_property(struct of_changeset *ocs,
932 struct device_node *np, struct property *prop)
934 return of_changeset_action(ocs, OF_RECONFIG_ADD_PROPERTY, np, prop);
937 static inline int of_changeset_remove_property(struct of_changeset *ocs,
938 struct device_node *np, struct property *prop)
940 return of_changeset_action(ocs, OF_RECONFIG_REMOVE_PROPERTY, np, prop);
943 static inline int of_changeset_update_property(struct of_changeset *ocs,
944 struct device_node *np, struct property *prop)
946 return of_changeset_action(ocs, OF_RECONFIG_UPDATE_PROPERTY, np, prop);
948 #else /* CONFIG_OF_DYNAMIC */
949 static inline int of_reconfig_notifier_register(struct notifier_block *nb)
953 static inline int of_reconfig_notifier_unregister(struct notifier_block *nb)
957 static inline int of_reconfig_notify(unsigned long action,
958 struct of_reconfig_data *arg)
962 static inline int of_reconfig_get_state_change(unsigned long action,
963 struct of_reconfig_data *arg)
967 #endif /* CONFIG_OF_DYNAMIC */
969 /* CONFIG_OF_RESOLVE api */
970 extern int of_resolve_phandles(struct device_node *tree);
976 #ifdef CONFIG_OF_OVERLAY
978 /* ID based overlays; the API for external users */
979 int of_overlay_create(struct device_node *tree);
980 int of_overlay_destroy(int id);
981 int of_overlay_destroy_all(void);
985 static inline int of_overlay_create(struct device_node *tree)
990 static inline int of_overlay_destroy(int id)
995 static inline int of_overlay_destroy_all(void)
1002 #endif /* _LINUX_OF_H */