1#ifndef _LINUX_OF_H
2#define _LINUX_OF_H
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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/property.h>
27#include <linux/list.h>
28
29#include <asm/byteorder.h>
30#include <asm/errno.h>
31
32typedef u32 phandle;
33typedef u32 ihandle;
34
35struct property {
36 char *name;
37 int length;
38 void *value;
39 struct property *next;
40 unsigned long _flags;
41 unsigned int unique_id;
42 struct bin_attribute attr;
43};
44
45#if defined(CONFIG_SPARC)
46struct of_irq_controller;
47#endif
48
49struct device_node {
50 const char *name;
51 const char *type;
52 phandle phandle;
53 const char *full_name;
54 struct fwnode_handle fwnode;
55
56 struct property *properties;
57 struct property *deadprops;
58 struct device_node *parent;
59 struct device_node *child;
60 struct device_node *sibling;
61 struct kobject kobj;
62 unsigned long _flags;
63 void *data;
64#if defined(CONFIG_SPARC)
65 const char *path_component_name;
66 unsigned int unique_id;
67 struct of_irq_controller *irq_trans;
68#endif
69};
70
71#define MAX_PHANDLE_ARGS 16
72struct of_phandle_args {
73 struct device_node *np;
74 int args_count;
75 uint32_t args[MAX_PHANDLE_ARGS];
76};
77
78struct of_reconfig_data {
79 struct device_node *dn;
80 struct property *prop;
81 struct property *old_prop;
82};
83
84
85extern struct kobj_type of_node_ktype;
86static inline void of_node_init(struct device_node *node)
87{
88 kobject_init(&node->kobj, &of_node_ktype);
89 node->fwnode.type = FWNODE_OF;
90}
91
92
93static inline int of_node_is_initialized(struct device_node *node)
94{
95 return node && node->kobj.state_initialized;
96}
97
98
99static inline int of_node_is_attached(struct device_node *node)
100{
101 return node && node->kobj.state_in_sysfs;
102}
103
104#ifdef CONFIG_OF_DYNAMIC
105extern struct device_node *of_node_get(struct device_node *node);
106extern void of_node_put(struct device_node *node);
107#else
108
109static inline struct device_node *of_node_get(struct device_node *node)
110{
111 return node;
112}
113static inline void of_node_put(struct device_node *node) { }
114#endif
115
116
117extern struct device_node *of_root;
118extern struct device_node *of_chosen;
119extern struct device_node *of_aliases;
120extern struct device_node *of_stdout;
121extern raw_spinlock_t devtree_lock;
122
123
124#define OF_DYNAMIC 1
125#define OF_DETACHED 2
126#define OF_POPULATED 3
127#define OF_POPULATED_BUS 4
128
129#define OF_BAD_ADDR ((u64)-1)
130
131#ifdef CONFIG_OF
132void of_core_init(void);
133
134static inline bool is_of_node(struct fwnode_handle *fwnode)
135{
136 return !IS_ERR_OR_NULL(fwnode) && fwnode->type == FWNODE_OF;
137}
138
139static inline struct device_node *to_of_node(struct fwnode_handle *fwnode)
140{
141 return is_of_node(fwnode) ?
142 container_of(fwnode, struct device_node, fwnode) : NULL;
143}
144
145static inline bool of_have_populated_dt(void)
146{
147 return of_root != NULL;
148}
149
150static inline bool of_node_is_root(const struct device_node *node)
151{
152 return node && (node->parent == NULL);
153}
154
155static inline int of_node_check_flag(struct device_node *n, unsigned long flag)
156{
157 return test_bit(flag, &n->_flags);
158}
159
160static inline int of_node_test_and_set_flag(struct device_node *n,
161 unsigned long flag)
162{
163 return test_and_set_bit(flag, &n->_flags);
164}
165
166static inline void of_node_set_flag(struct device_node *n, unsigned long flag)
167{
168 set_bit(flag, &n->_flags);
169}
170
171static inline void of_node_clear_flag(struct device_node *n, unsigned long flag)
172{
173 clear_bit(flag, &n->_flags);
174}
175
176static inline int of_property_check_flag(struct property *p, unsigned long flag)
177{
178 return test_bit(flag, &p->_flags);
179}
180
181static inline void of_property_set_flag(struct property *p, unsigned long flag)
182{
183 set_bit(flag, &p->_flags);
184}
185
186static inline void of_property_clear_flag(struct property *p, unsigned long flag)
187{
188 clear_bit(flag, &p->_flags);
189}
190
191extern struct device_node *__of_find_all_nodes(struct device_node *prev);
192extern struct device_node *of_find_all_nodes(struct device_node *prev);
193
194
195
196
197
198
199static inline u64 of_read_number(const __be32 *cell, int size)
200{
201 u64 r = 0;
202 while (size--)
203 r = (r << 32) | be32_to_cpu(*(cell++));
204 return r;
205}
206
207
208static inline unsigned long of_read_ulong(const __be32 *cell, int size)
209{
210
211 return of_read_number(cell, size);
212}
213
214#if defined(CONFIG_SPARC)
215#include <asm/prom.h>
216#endif
217
218
219#if !defined(OF_ROOT_NODE_ADDR_CELLS_DEFAULT)
220#define OF_ROOT_NODE_ADDR_CELLS_DEFAULT 1
221#define OF_ROOT_NODE_SIZE_CELLS_DEFAULT 1
222#endif
223
224
225#if !defined(of_compat_cmp)
226#define of_compat_cmp(s1, s2, l) strcasecmp((s1), (s2))
227#define of_prop_cmp(s1, s2) strcmp((s1), (s2))
228#define of_node_cmp(s1, s2) strcasecmp((s1), (s2))
229#endif
230
231#define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags)
232#define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags)
233
234static inline const char *of_node_full_name(const struct device_node *np)
235{
236 return np ? np->full_name : "<no-node>";
237}
238
239#define for_each_of_allnodes_from(from, dn) \
240 for (dn = __of_find_all_nodes(from); dn; dn = __of_find_all_nodes(dn))
241#define for_each_of_allnodes(dn) for_each_of_allnodes_from(NULL, dn)
242extern struct device_node *of_find_node_by_name(struct device_node *from,
243 const char *name);
244extern struct device_node *of_find_node_by_type(struct device_node *from,
245 const char *type);
246extern struct device_node *of_find_compatible_node(struct device_node *from,
247 const char *type, const char *compat);
248extern struct device_node *of_find_matching_node_and_match(
249 struct device_node *from,
250 const struct of_device_id *matches,
251 const struct of_device_id **match);
252
253extern struct device_node *of_find_node_opts_by_path(const char *path,
254 const char **opts);
255static inline struct device_node *of_find_node_by_path(const char *path)
256{
257 return of_find_node_opts_by_path(path, NULL);
258}
259
260extern struct device_node *of_find_node_by_phandle(phandle handle);
261extern struct device_node *of_get_parent(const struct device_node *node);
262extern struct device_node *of_get_next_parent(struct device_node *node);
263extern struct device_node *of_get_next_child(const struct device_node *node,
264 struct device_node *prev);
265extern struct device_node *of_get_next_available_child(
266 const struct device_node *node, struct device_node *prev);
267
268extern struct device_node *of_get_child_by_name(const struct device_node *node,
269 const char *name);
270
271
272extern struct device_node *of_find_next_cache_node(const struct device_node *);
273extern struct device_node *of_find_node_with_property(
274 struct device_node *from, const char *prop_name);
275
276extern struct property *of_find_property(const struct device_node *np,
277 const char *name,
278 int *lenp);
279extern int of_property_count_elems_of_size(const struct device_node *np,
280 const char *propname, int elem_size);
281extern int of_property_read_u32_index(const struct device_node *np,
282 const char *propname,
283 u32 index, u32 *out_value);
284extern int of_property_read_u8_array(const struct device_node *np,
285 const char *propname, u8 *out_values, size_t sz);
286extern int of_property_read_u16_array(const struct device_node *np,
287 const char *propname, u16 *out_values, size_t sz);
288extern int of_property_read_u32_array(const struct device_node *np,
289 const char *propname,
290 u32 *out_values,
291 size_t sz);
292extern int of_property_read_u64(const struct device_node *np,
293 const char *propname, u64 *out_value);
294extern int of_property_read_u64_array(const struct device_node *np,
295 const char *propname,
296 u64 *out_values,
297 size_t sz);
298
299extern int of_property_read_string(const struct device_node *np,
300 const char *propname,
301 const char **out_string);
302extern int of_property_match_string(const struct device_node *np,
303 const char *propname,
304 const char *string);
305extern int of_property_read_string_helper(const struct device_node *np,
306 const char *propname,
307 const char **out_strs, size_t sz, int index);
308extern int of_device_is_compatible(const struct device_node *device,
309 const char *);
310extern bool of_device_is_available(const struct device_node *device);
311extern bool of_device_is_big_endian(const struct device_node *device);
312extern const void *of_get_property(const struct device_node *node,
313 const char *name,
314 int *lenp);
315extern struct device_node *of_get_cpu_node(int cpu, unsigned int *thread);
316#define for_each_property_of_node(dn, pp) \
317 for (pp = dn->properties; pp != NULL; pp = pp->next)
318
319extern int of_n_addr_cells(struct device_node *np);
320extern int of_n_size_cells(struct device_node *np);
321extern const struct of_device_id *of_match_node(
322 const struct of_device_id *matches, const struct device_node *node);
323extern int of_modalias_node(struct device_node *node, char *modalias, int len);
324extern void of_print_phandle_args(const char *msg, const struct of_phandle_args *args);
325extern struct device_node *of_parse_phandle(const struct device_node *np,
326 const char *phandle_name,
327 int index);
328extern int of_parse_phandle_with_args(const struct device_node *np,
329 const char *list_name, const char *cells_name, int index,
330 struct of_phandle_args *out_args);
331extern int of_parse_phandle_with_fixed_args(const struct device_node *np,
332 const char *list_name, int cells_count, int index,
333 struct of_phandle_args *out_args);
334extern int of_count_phandle_with_args(const struct device_node *np,
335 const char *list_name, const char *cells_name);
336
337extern void of_alias_scan(void * (*dt_alloc)(u64 size, u64 align));
338extern int of_alias_get_id(struct device_node *np, const char *stem);
339extern int of_alias_get_highest_id(const char *stem);
340
341extern int of_machine_is_compatible(const char *compat);
342
343extern int of_add_property(struct device_node *np, struct property *prop);
344extern int of_remove_property(struct device_node *np, struct property *prop);
345extern int of_update_property(struct device_node *np, struct property *newprop);
346
347
348#define OF_RECONFIG_ATTACH_NODE 0x0001
349#define OF_RECONFIG_DETACH_NODE 0x0002
350#define OF_RECONFIG_ADD_PROPERTY 0x0003
351#define OF_RECONFIG_REMOVE_PROPERTY 0x0004
352#define OF_RECONFIG_UPDATE_PROPERTY 0x0005
353
354extern int of_attach_node(struct device_node *);
355extern int of_detach_node(struct device_node *);
356
357#define of_match_ptr(_ptr) (_ptr)
358
359
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365
366
367const __be32 *of_prop_next_u32(struct property *prop, const __be32 *cur,
368 u32 *pu);
369
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373
374
375
376const char *of_prop_next_string(struct property *prop, const char *cur);
377
378bool of_console_check(struct device_node *dn, char *name, int index);
379
380#else
381
382static inline void of_core_init(void)
383{
384}
385
386static inline bool is_of_node(struct fwnode_handle *fwnode)
387{
388 return false;
389}
390
391static inline struct device_node *to_of_node(struct fwnode_handle *fwnode)
392{
393 return NULL;
394}
395
396static inline const char* of_node_full_name(const struct device_node *np)
397{
398 return "<no-node>";
399}
400
401static inline struct device_node *of_find_node_by_name(struct device_node *from,
402 const char *name)
403{
404 return NULL;
405}
406
407static inline struct device_node *of_find_node_by_type(struct device_node *from,
408 const char *type)
409{
410 return NULL;
411}
412
413static inline struct device_node *of_find_matching_node_and_match(
414 struct device_node *from,
415 const struct of_device_id *matches,
416 const struct of_device_id **match)
417{
418 return NULL;
419}
420
421static inline struct device_node *of_find_node_by_path(const char *path)
422{
423 return NULL;
424}
425
426static inline struct device_node *of_find_node_opts_by_path(const char *path,
427 const char **opts)
428{
429 return NULL;
430}
431
432static inline struct device_node *of_find_node_by_phandle(phandle handle)
433{
434 return NULL;
435}
436
437static inline struct device_node *of_get_parent(const struct device_node *node)
438{
439 return NULL;
440}
441
442static inline struct device_node *of_get_next_child(
443 const struct device_node *node, struct device_node *prev)
444{
445 return NULL;
446}
447
448static inline struct device_node *of_get_next_available_child(
449 const struct device_node *node, struct device_node *prev)
450{
451 return NULL;
452}
453
454static inline struct device_node *of_find_node_with_property(
455 struct device_node *from, const char *prop_name)
456{
457 return NULL;
458}
459
460static inline bool of_have_populated_dt(void)
461{
462 return false;
463}
464
465static inline struct device_node *of_get_child_by_name(
466 const struct device_node *node,
467 const char *name)
468{
469 return NULL;
470}
471
472static inline int of_device_is_compatible(const struct device_node *device,
473 const char *name)
474{
475 return 0;
476}
477
478static inline bool of_device_is_available(const struct device_node *device)
479{
480 return false;
481}
482
483static inline bool of_device_is_big_endian(const struct device_node *device)
484{
485 return false;
486}
487
488static inline struct property *of_find_property(const struct device_node *np,
489 const char *name,
490 int *lenp)
491{
492 return NULL;
493}
494
495static inline struct device_node *of_find_compatible_node(
496 struct device_node *from,
497 const char *type,
498 const char *compat)
499{
500 return NULL;
501}
502
503static inline int of_property_count_elems_of_size(const struct device_node *np,
504 const char *propname, int elem_size)
505{
506 return -ENOSYS;
507}
508
509static inline int of_property_read_u32_index(const struct device_node *np,
510 const char *propname, u32 index, u32 *out_value)
511{
512 return -ENOSYS;
513}
514
515static inline int of_property_read_u8_array(const struct device_node *np,
516 const char *propname, u8 *out_values, size_t sz)
517{
518 return -ENOSYS;
519}
520
521static inline int of_property_read_u16_array(const struct device_node *np,
522 const char *propname, u16 *out_values, size_t sz)
523{
524 return -ENOSYS;
525}
526
527static inline int of_property_read_u32_array(const struct device_node *np,
528 const char *propname,
529 u32 *out_values, size_t sz)
530{
531 return -ENOSYS;
532}
533
534static inline int of_property_read_u64_array(const struct device_node *np,
535 const char *propname,
536 u64 *out_values, size_t sz)
537{
538 return -ENOSYS;
539}
540
541static inline int of_property_read_string(const struct device_node *np,
542 const char *propname,
543 const char **out_string)
544{
545 return -ENOSYS;
546}
547
548static inline int of_property_read_string_helper(const struct device_node *np,
549 const char *propname,
550 const char **out_strs, size_t sz, int index)
551{
552 return -ENOSYS;
553}
554
555static inline const void *of_get_property(const struct device_node *node,
556 const char *name,
557 int *lenp)
558{
559 return NULL;
560}
561
562static inline struct device_node *of_get_cpu_node(int cpu,
563 unsigned int *thread)
564{
565 return NULL;
566}
567
568static inline int of_property_read_u64(const struct device_node *np,
569 const char *propname, u64 *out_value)
570{
571 return -ENOSYS;
572}
573
574static inline int of_property_match_string(const struct device_node *np,
575 const char *propname,
576 const char *string)
577{
578 return -ENOSYS;
579}
580
581static inline struct device_node *of_parse_phandle(const struct device_node *np,
582 const char *phandle_name,
583 int index)
584{
585 return NULL;
586}
587
588static inline int of_parse_phandle_with_args(struct device_node *np,
589 const char *list_name,
590 const char *cells_name,
591 int index,
592 struct of_phandle_args *out_args)
593{
594 return -ENOSYS;
595}
596
597static inline int of_parse_phandle_with_fixed_args(const struct device_node *np,
598 const char *list_name, int cells_count, int index,
599 struct of_phandle_args *out_args)
600{
601 return -ENOSYS;
602}
603
604static inline int of_count_phandle_with_args(struct device_node *np,
605 const char *list_name,
606 const char *cells_name)
607{
608 return -ENOSYS;
609}
610
611static inline int of_alias_get_id(struct device_node *np, const char *stem)
612{
613 return -ENOSYS;
614}
615
616static inline int of_alias_get_highest_id(const char *stem)
617{
618 return -ENOSYS;
619}
620
621static inline int of_machine_is_compatible(const char *compat)
622{
623 return 0;
624}
625
626static inline bool of_console_check(const struct device_node *dn, const char *name, int index)
627{
628 return false;
629}
630
631static inline const __be32 *of_prop_next_u32(struct property *prop,
632 const __be32 *cur, u32 *pu)
633{
634 return NULL;
635}
636
637static inline const char *of_prop_next_string(struct property *prop,
638 const char *cur)
639{
640 return NULL;
641}
642
643static inline int of_node_check_flag(struct device_node *n, unsigned long flag)
644{
645 return 0;
646}
647
648static inline int of_node_test_and_set_flag(struct device_node *n,
649 unsigned long flag)
650{
651 return 0;
652}
653
654static inline void of_node_set_flag(struct device_node *n, unsigned long flag)
655{
656}
657
658static inline void of_node_clear_flag(struct device_node *n, unsigned long flag)
659{
660}
661
662static inline int of_property_check_flag(struct property *p, unsigned long flag)
663{
664 return 0;
665}
666
667static inline void of_property_set_flag(struct property *p, unsigned long flag)
668{
669}
670
671static inline void of_property_clear_flag(struct property *p, unsigned long flag)
672{
673}
674
675#define of_match_ptr(_ptr) NULL
676#define of_match_node(_matches, _node) NULL
677#endif
678
679#if defined(CONFIG_OF) && defined(CONFIG_NUMA)
680extern int of_node_to_nid(struct device_node *np);
681#else
682static inline int of_node_to_nid(struct device_node *device)
683{
684 return NUMA_NO_NODE;
685}
686#endif
687
688static inline struct device_node *of_find_matching_node(
689 struct device_node *from,
690 const struct of_device_id *matches)
691{
692 return of_find_matching_node_and_match(from, matches, NULL);
693}
694
695
696
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705
706static inline int of_property_count_u8_elems(const struct device_node *np,
707 const char *propname)
708{
709 return of_property_count_elems_of_size(np, propname, sizeof(u8));
710}
711
712
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722
723static inline int of_property_count_u16_elems(const struct device_node *np,
724 const char *propname)
725{
726 return of_property_count_elems_of_size(np, propname, sizeof(u16));
727}
728
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740static inline int of_property_count_u32_elems(const struct device_node *np,
741 const char *propname)
742{
743 return of_property_count_elems_of_size(np, propname, sizeof(u32));
744}
745
746
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756
757static inline int of_property_count_u64_elems(const struct device_node *np,
758 const char *propname)
759{
760 return of_property_count_elems_of_size(np, propname, sizeof(u64));
761}
762
763
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775
776static inline int of_property_read_string_array(const struct device_node *np,
777 const char *propname, const char **out_strs,
778 size_t sz)
779{
780 return of_property_read_string_helper(np, propname, out_strs, sz, 0);
781}
782
783
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794
795static inline int of_property_count_strings(const struct device_node *np,
796 const char *propname)
797{
798 return of_property_read_string_helper(np, propname, NULL, 0, 0);
799}
800
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818
819static inline int of_property_read_string_index(const struct device_node *np,
820 const char *propname,
821 int index, const char **output)
822{
823 int rc = of_property_read_string_helper(np, propname, output, 1, index);
824 return rc < 0 ? rc : 0;
825}
826
827
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834
835static inline bool of_property_read_bool(const struct device_node *np,
836 const char *propname)
837{
838 struct property *prop = of_find_property(np, propname, NULL);
839
840 return prop ? true : false;
841}
842
843static inline int of_property_read_u8(const struct device_node *np,
844 const char *propname,
845 u8 *out_value)
846{
847 return of_property_read_u8_array(np, propname, out_value, 1);
848}
849
850static inline int of_property_read_u16(const struct device_node *np,
851 const char *propname,
852 u16 *out_value)
853{
854 return of_property_read_u16_array(np, propname, out_value, 1);
855}
856
857static inline int of_property_read_u32(const struct device_node *np,
858 const char *propname,
859 u32 *out_value)
860{
861 return of_property_read_u32_array(np, propname, out_value, 1);
862}
863
864static inline int of_property_read_s32(const struct device_node *np,
865 const char *propname,
866 s32 *out_value)
867{
868 return of_property_read_u32(np, propname, (u32*) out_value);
869}
870
871#define of_property_for_each_u32(np, propname, prop, p, u) \
872 for (prop = of_find_property(np, propname, NULL), \
873 p = of_prop_next_u32(prop, NULL, &u); \
874 p; \
875 p = of_prop_next_u32(prop, p, &u))
876
877#define of_property_for_each_string(np, propname, prop, s) \
878 for (prop = of_find_property(np, propname, NULL), \
879 s = of_prop_next_string(prop, NULL); \
880 s; \
881 s = of_prop_next_string(prop, s))
882
883#define for_each_node_by_name(dn, name) \
884 for (dn = of_find_node_by_name(NULL, name); dn; \
885 dn = of_find_node_by_name(dn, name))
886#define for_each_node_by_type(dn, type) \
887 for (dn = of_find_node_by_type(NULL, type); dn; \
888 dn = of_find_node_by_type(dn, type))
889#define for_each_compatible_node(dn, type, compatible) \
890 for (dn = of_find_compatible_node(NULL, type, compatible); dn; \
891 dn = of_find_compatible_node(dn, type, compatible))
892#define for_each_matching_node(dn, matches) \
893 for (dn = of_find_matching_node(NULL, matches); dn; \
894 dn = of_find_matching_node(dn, matches))
895#define for_each_matching_node_and_match(dn, matches, match) \
896 for (dn = of_find_matching_node_and_match(NULL, matches, match); \
897 dn; dn = of_find_matching_node_and_match(dn, matches, match))
898
899#define for_each_child_of_node(parent, child) \
900 for (child = of_get_next_child(parent, NULL); child != NULL; \
901 child = of_get_next_child(parent, child))
902#define for_each_available_child_of_node(parent, child) \
903 for (child = of_get_next_available_child(parent, NULL); child != NULL; \
904 child = of_get_next_available_child(parent, child))
905
906#define for_each_node_with_property(dn, prop_name) \
907 for (dn = of_find_node_with_property(NULL, prop_name); dn; \
908 dn = of_find_node_with_property(dn, prop_name))
909
910static inline int of_get_child_count(const struct device_node *np)
911{
912 struct device_node *child;
913 int num = 0;
914
915 for_each_child_of_node(np, child)
916 num++;
917
918 return num;
919}
920
921static inline int of_get_available_child_count(const struct device_node *np)
922{
923 struct device_node *child;
924 int num = 0;
925
926 for_each_available_child_of_node(np, child)
927 num++;
928
929 return num;
930}
931
932#if defined(CONFIG_OF) && !defined(MODULE)
933#define _OF_DECLARE(table, name, compat, fn, fn_type) \
934 static const struct of_device_id __of_table_##name \
935 __used __section(__##table##_of_table) \
936 = { .compatible = compat, \
937 .data = (fn == (fn_type)NULL) ? fn : fn }
938#else
939#define _OF_DECLARE(table, name, compat, fn, fn_type) \
940 static const struct of_device_id __of_table_##name \
941 __attribute__((unused)) \
942 = { .compatible = compat, \
943 .data = (fn == (fn_type)NULL) ? fn : fn }
944#endif
945
946typedef int (*of_init_fn_2)(struct device_node *, struct device_node *);
947typedef void (*of_init_fn_1)(struct device_node *);
948
949#define OF_DECLARE_1(table, name, compat, fn) \
950 _OF_DECLARE(table, name, compat, fn, of_init_fn_1)
951#define OF_DECLARE_2(table, name, compat, fn) \
952 _OF_DECLARE(table, name, compat, fn, of_init_fn_2)
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968struct of_changeset_entry {
969 struct list_head node;
970 unsigned long action;
971 struct device_node *np;
972 struct property *prop;
973 struct property *old_prop;
974};
975
976
977
978
979
980
981
982
983
984
985
986struct of_changeset {
987 struct list_head entries;
988};
989
990enum of_reconfig_change {
991 OF_RECONFIG_NO_CHANGE = 0,
992 OF_RECONFIG_CHANGE_ADD,
993 OF_RECONFIG_CHANGE_REMOVE,
994};
995
996#ifdef CONFIG_OF_DYNAMIC
997extern int of_reconfig_notifier_register(struct notifier_block *);
998extern int of_reconfig_notifier_unregister(struct notifier_block *);
999extern int of_reconfig_notify(unsigned long, struct of_reconfig_data *rd);
1000extern int of_reconfig_get_state_change(unsigned long action,
1001 struct of_reconfig_data *arg);
1002
1003extern void of_changeset_init(struct of_changeset *ocs);
1004extern void of_changeset_destroy(struct of_changeset *ocs);
1005extern int of_changeset_apply(struct of_changeset *ocs);
1006extern int of_changeset_revert(struct of_changeset *ocs);
1007extern int of_changeset_action(struct of_changeset *ocs,
1008 unsigned long action, struct device_node *np,
1009 struct property *prop);
1010
1011static inline int of_changeset_attach_node(struct of_changeset *ocs,
1012 struct device_node *np)
1013{
1014 return of_changeset_action(ocs, OF_RECONFIG_ATTACH_NODE, np, NULL);
1015}
1016
1017static inline int of_changeset_detach_node(struct of_changeset *ocs,
1018 struct device_node *np)
1019{
1020 return of_changeset_action(ocs, OF_RECONFIG_DETACH_NODE, np, NULL);
1021}
1022
1023static inline int of_changeset_add_property(struct of_changeset *ocs,
1024 struct device_node *np, struct property *prop)
1025{
1026 return of_changeset_action(ocs, OF_RECONFIG_ADD_PROPERTY, np, prop);
1027}
1028
1029static inline int of_changeset_remove_property(struct of_changeset *ocs,
1030 struct device_node *np, struct property *prop)
1031{
1032 return of_changeset_action(ocs, OF_RECONFIG_REMOVE_PROPERTY, np, prop);
1033}
1034
1035static inline int of_changeset_update_property(struct of_changeset *ocs,
1036 struct device_node *np, struct property *prop)
1037{
1038 return of_changeset_action(ocs, OF_RECONFIG_UPDATE_PROPERTY, np, prop);
1039}
1040#else
1041static inline int of_reconfig_notifier_register(struct notifier_block *nb)
1042{
1043 return -EINVAL;
1044}
1045static inline int of_reconfig_notifier_unregister(struct notifier_block *nb)
1046{
1047 return -EINVAL;
1048}
1049static inline int of_reconfig_notify(unsigned long action,
1050 struct of_reconfig_data *arg)
1051{
1052 return -EINVAL;
1053}
1054static inline int of_reconfig_get_state_change(unsigned long action,
1055 struct of_reconfig_data *arg)
1056{
1057 return -EINVAL;
1058}
1059#endif
1060
1061
1062extern int of_resolve_phandles(struct device_node *tree);
1063
1064
1065
1066
1067
1068
1069
1070static inline bool of_device_is_system_power_controller(const struct device_node *np)
1071{
1072 return of_property_read_bool(np, "system-power-controller");
1073}
1074
1075
1076
1077
1078
1079#ifdef CONFIG_OF_OVERLAY
1080
1081
1082int of_overlay_create(struct device_node *tree);
1083int of_overlay_destroy(int id);
1084int of_overlay_destroy_all(void);
1085
1086#else
1087
1088static inline int of_overlay_create(struct device_node *tree)
1089{
1090 return -ENOTSUPP;
1091}
1092
1093static inline int of_overlay_destroy(int id)
1094{
1095 return -ENOTSUPP;
1096}
1097
1098static inline int of_overlay_destroy_all(void)
1099{
1100 return -ENOTSUPP;
1101}
1102
1103#endif
1104
1105#endif
1106