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76c1ce78 SR |
1 | #ifndef _LINUX_OF_H |
2 | #define _LINUX_OF_H | |
3 | /* | |
4 | * Definitions for talking to the Open Firmware PROM on | |
5 | * Power Macintosh and other computers. | |
6 | * | |
7 | * Copyright (C) 1996-2005 Paul Mackerras. | |
8 | * | |
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. | |
12 | * | |
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. | |
17 | */ | |
18 | #include <linux/types.h> | |
1977f032 | 19 | #include <linux/bitops.h> |
e51130c0 | 20 | #include <linux/errno.h> |
6f192492 | 21 | #include <linux/kref.h> |
283029d1 | 22 | #include <linux/mod_devicetable.h> |
0d351c3e | 23 | #include <linux/spinlock.h> |
5ca4db61 | 24 | #include <linux/topology.h> |
1cf3d8b3 | 25 | #include <linux/notifier.h> |
76c1ce78 | 26 | |
2e89e685 | 27 | #include <asm/byteorder.h> |
d0a99402 | 28 | #include <asm/errno.h> |
2e89e685 | 29 | |
731581e6 GL |
30 | typedef u32 phandle; |
31 | typedef u32 ihandle; | |
32 | ||
33 | struct property { | |
34 | char *name; | |
35 | int length; | |
36 | void *value; | |
37 | struct property *next; | |
38 | unsigned long _flags; | |
39 | unsigned int unique_id; | |
40 | }; | |
41 | ||
6f192492 GL |
42 | #if defined(CONFIG_SPARC) |
43 | struct of_irq_controller; | |
44 | #endif | |
45 | ||
46 | struct device_node { | |
47 | const char *name; | |
48 | const char *type; | |
6016a363 | 49 | phandle phandle; |
c22618a1 | 50 | const char *full_name; |
6f192492 GL |
51 | |
52 | struct property *properties; | |
53 | struct property *deadprops; /* removed properties */ | |
54 | struct device_node *parent; | |
55 | struct device_node *child; | |
56 | struct device_node *sibling; | |
57 | struct device_node *next; /* next device of same type */ | |
58 | struct device_node *allnext; /* next in list of all nodes */ | |
59 | struct proc_dir_entry *pde; /* this node's proc directory */ | |
60 | struct kref kref; | |
61 | unsigned long _flags; | |
62 | void *data; | |
63 | #if defined(CONFIG_SPARC) | |
c22618a1 | 64 | const char *path_component_name; |
6f192492 GL |
65 | unsigned int unique_id; |
66 | struct of_irq_controller *irq_trans; | |
67 | #endif | |
68 | }; | |
69 | ||
15c9a0ac GL |
70 | #define MAX_PHANDLE_ARGS 8 |
71 | struct of_phandle_args { | |
72 | struct device_node *np; | |
73 | int args_count; | |
74 | uint32_t args[MAX_PHANDLE_ARGS]; | |
75 | }; | |
76 | ||
0f22dd39 GL |
77 | #ifdef CONFIG_OF_DYNAMIC |
78 | extern struct device_node *of_node_get(struct device_node *node); | |
79 | extern void of_node_put(struct device_node *node); | |
80 | #else /* CONFIG_OF_DYNAMIC */ | |
3ecdd051 RH |
81 | /* Dummy ref counting routines - to be implemented later */ |
82 | static inline struct device_node *of_node_get(struct device_node *node) | |
83 | { | |
84 | return node; | |
85 | } | |
0f22dd39 GL |
86 | static inline void of_node_put(struct device_node *node) { } |
87 | #endif /* !CONFIG_OF_DYNAMIC */ | |
3ecdd051 | 88 | |
c9e358df GL |
89 | #ifdef CONFIG_OF |
90 | ||
41f88009 | 91 | /* Pointer for first entry in chain of all nodes. */ |
465aac6d | 92 | extern struct device_node *of_allnodes; |
fc0bdae4 | 93 | extern struct device_node *of_chosen; |
611cad72 | 94 | extern struct device_node *of_aliases; |
d6d3c4e6 | 95 | extern raw_spinlock_t devtree_lock; |
41f88009 | 96 | |
3bcbaf6e SAS |
97 | static inline bool of_have_populated_dt(void) |
98 | { | |
465aac6d | 99 | return of_allnodes != NULL; |
3bcbaf6e SAS |
100 | } |
101 | ||
035ebefc AS |
102 | static inline bool of_node_is_root(const struct device_node *node) |
103 | { | |
104 | return node && (node->parent == NULL); | |
105 | } | |
106 | ||
50436312 GL |
107 | static inline int of_node_check_flag(struct device_node *n, unsigned long flag) |
108 | { | |
109 | return test_bit(flag, &n->_flags); | |
110 | } | |
111 | ||
112 | static inline void of_node_set_flag(struct device_node *n, unsigned long flag) | |
113 | { | |
114 | set_bit(flag, &n->_flags); | |
115 | } | |
116 | ||
e91edcf5 GL |
117 | extern struct device_node *of_find_all_nodes(struct device_node *prev); |
118 | ||
b6caf2ad | 119 | /* |
3d6b8828 | 120 | * OF address retrieval & translation |
b6caf2ad GL |
121 | */ |
122 | ||
123 | /* Helper to read a big number; size is in cells (not bytes) */ | |
2e89e685 | 124 | static inline u64 of_read_number(const __be32 *cell, int size) |
b6caf2ad GL |
125 | { |
126 | u64 r = 0; | |
127 | while (size--) | |
2e89e685 | 128 | r = (r << 32) | be32_to_cpu(*(cell++)); |
b6caf2ad GL |
129 | return r; |
130 | } | |
131 | ||
132 | /* Like of_read_number, but we want an unsigned long result */ | |
2e89e685 | 133 | static inline unsigned long of_read_ulong(const __be32 *cell, int size) |
b6caf2ad | 134 | { |
2be09cb9 GL |
135 | /* toss away upper bits if unsigned long is smaller than u64 */ |
136 | return of_read_number(cell, size); | |
b6caf2ad | 137 | } |
b6caf2ad | 138 | |
b5b4bb3f | 139 | #if defined(CONFIG_SPARC) |
76c1ce78 | 140 | #include <asm/prom.h> |
b5b4bb3f | 141 | #endif |
76c1ce78 | 142 | |
7c7b60cb GL |
143 | /* Default #address and #size cells. Allow arch asm/prom.h to override */ |
144 | #if !defined(OF_ROOT_NODE_ADDR_CELLS_DEFAULT) | |
145 | #define OF_ROOT_NODE_ADDR_CELLS_DEFAULT 1 | |
146 | #define OF_ROOT_NODE_SIZE_CELLS_DEFAULT 1 | |
147 | #endif | |
148 | ||
149 | /* Default string compare functions, Allow arch asm/prom.h to override */ | |
150 | #if !defined(of_compat_cmp) | |
1976152f | 151 | #define of_compat_cmp(s1, s2, l) strcasecmp((s1), (s2)) |
7c7b60cb GL |
152 | #define of_prop_cmp(s1, s2) strcmp((s1), (s2)) |
153 | #define of_node_cmp(s1, s2) strcasecmp((s1), (s2)) | |
154 | #endif | |
155 | ||
76c1ce78 SR |
156 | /* flag descriptions */ |
157 | #define OF_DYNAMIC 1 /* node and properties were allocated via kmalloc */ | |
158 | #define OF_DETACHED 2 /* node has been detached from the device tree */ | |
159 | ||
61e955db GL |
160 | #define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags) |
161 | #define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags) | |
162 | ||
76c1ce78 SR |
163 | #define OF_BAD_ADDR ((u64)-1) |
164 | ||
c0a05bf0 | 165 | static inline const char *of_node_full_name(const struct device_node *np) |
74a7f084 GL |
166 | { |
167 | return np ? np->full_name : "<no-node>"; | |
168 | } | |
169 | ||
76c1ce78 SR |
170 | extern struct device_node *of_find_node_by_name(struct device_node *from, |
171 | const char *name); | |
76c1ce78 SR |
172 | extern struct device_node *of_find_node_by_type(struct device_node *from, |
173 | const char *type); | |
76c1ce78 SR |
174 | extern struct device_node *of_find_compatible_node(struct device_node *from, |
175 | const char *type, const char *compat); | |
50c8af4c SW |
176 | extern struct device_node *of_find_matching_node_and_match( |
177 | struct device_node *from, | |
178 | const struct of_device_id *matches, | |
179 | const struct of_device_id **match); | |
662372e4 | 180 | |
76c1ce78 SR |
181 | extern struct device_node *of_find_node_by_path(const char *path); |
182 | extern struct device_node *of_find_node_by_phandle(phandle handle); | |
183 | extern struct device_node *of_get_parent(const struct device_node *node); | |
f4eb0107 | 184 | extern struct device_node *of_get_next_parent(struct device_node *node); |
76c1ce78 SR |
185 | extern struct device_node *of_get_next_child(const struct device_node *node, |
186 | struct device_node *prev); | |
3296193d TT |
187 | extern struct device_node *of_get_next_available_child( |
188 | const struct device_node *node, struct device_node *prev); | |
189 | ||
9c19761a SK |
190 | extern struct device_node *of_get_child_by_name(const struct device_node *node, |
191 | const char *name); | |
954e04b9 | 192 | |
a3e31b45 SK |
193 | /* cache lookup */ |
194 | extern struct device_node *of_find_next_cache_node(const struct device_node *); | |
1e291b14 ME |
195 | extern struct device_node *of_find_node_with_property( |
196 | struct device_node *from, const char *prop_name); | |
1e291b14 | 197 | |
76c1ce78 SR |
198 | extern struct property *of_find_property(const struct device_node *np, |
199 | const char *name, | |
200 | int *lenp); | |
3daf3726 TP |
201 | extern int of_property_read_u32_index(const struct device_node *np, |
202 | const char *propname, | |
203 | u32 index, u32 *out_value); | |
be193249 VK |
204 | extern int of_property_read_u8_array(const struct device_node *np, |
205 | const char *propname, u8 *out_values, size_t sz); | |
206 | extern int of_property_read_u16_array(const struct device_node *np, | |
207 | const char *propname, u16 *out_values, size_t sz); | |
0e373639 | 208 | extern int of_property_read_u32_array(const struct device_node *np, |
aac285c6 | 209 | const char *propname, |
0e373639 RH |
210 | u32 *out_values, |
211 | size_t sz); | |
4cd7f7a3 JI |
212 | extern int of_property_read_u64(const struct device_node *np, |
213 | const char *propname, u64 *out_value); | |
0e373639 | 214 | |
aac285c6 JI |
215 | extern int of_property_read_string(struct device_node *np, |
216 | const char *propname, | |
217 | const char **out_string); | |
4fcd15a0 BC |
218 | extern int of_property_read_string_index(struct device_node *np, |
219 | const char *propname, | |
220 | int index, const char **output); | |
7aff0fe3 GL |
221 | extern int of_property_match_string(struct device_node *np, |
222 | const char *propname, | |
223 | const char *string); | |
4fcd15a0 BC |
224 | extern int of_property_count_strings(struct device_node *np, |
225 | const char *propname); | |
76c1ce78 SR |
226 | extern int of_device_is_compatible(const struct device_node *device, |
227 | const char *); | |
834d97d4 | 228 | extern int of_device_is_available(const struct device_node *device); |
76c1ce78 SR |
229 | extern const void *of_get_property(const struct device_node *node, |
230 | const char *name, | |
231 | int *lenp); | |
183912d3 | 232 | extern struct device_node *of_get_cpu_node(int cpu, unsigned int *thread); |
8af0da93 DA |
233 | #define for_each_property_of_node(dn, pp) \ |
234 | for (pp = dn->properties; pp != NULL; pp = pp->next) | |
611cad72 | 235 | |
76c1ce78 SR |
236 | extern int of_n_addr_cells(struct device_node *np); |
237 | extern int of_n_size_cells(struct device_node *np); | |
283029d1 GL |
238 | extern const struct of_device_id *of_match_node( |
239 | const struct of_device_id *matches, const struct device_node *node); | |
3f07af49 | 240 | extern int of_modalias_node(struct device_node *node, char *modalias, int len); |
624cfca5 | 241 | extern void of_print_phandle_args(const char *msg, const struct of_phandle_args *args); |
b8fbdc42 | 242 | extern struct device_node *of_parse_phandle(const struct device_node *np, |
739649c5 GL |
243 | const char *phandle_name, |
244 | int index); | |
93c667ca | 245 | extern int of_parse_phandle_with_args(const struct device_node *np, |
64b60e09 | 246 | const char *list_name, const char *cells_name, int index, |
15c9a0ac | 247 | struct of_phandle_args *out_args); |
035fd948 SW |
248 | extern int of_parse_phandle_with_fixed_args(const struct device_node *np, |
249 | const char *list_name, int cells_count, int index, | |
250 | struct of_phandle_args *out_args); | |
bd69f73f GL |
251 | extern int of_count_phandle_with_args(const struct device_node *np, |
252 | const char *list_name, const char *cells_name); | |
76c1ce78 | 253 | |
611cad72 SG |
254 | extern void of_alias_scan(void * (*dt_alloc)(u64 size, u64 align)); |
255 | extern int of_alias_get_id(struct device_node *np, const char *stem); | |
256 | ||
21b082ec GL |
257 | extern int of_machine_is_compatible(const char *compat); |
258 | ||
79d1c712 NF |
259 | extern int of_add_property(struct device_node *np, struct property *prop); |
260 | extern int of_remove_property(struct device_node *np, struct property *prop); | |
261 | extern int of_update_property(struct device_node *np, struct property *newprop); | |
21b082ec | 262 | |
fcdeb7fe | 263 | /* For updating the device tree at runtime */ |
1cf3d8b3 NF |
264 | #define OF_RECONFIG_ATTACH_NODE 0x0001 |
265 | #define OF_RECONFIG_DETACH_NODE 0x0002 | |
266 | #define OF_RECONFIG_ADD_PROPERTY 0x0003 | |
267 | #define OF_RECONFIG_REMOVE_PROPERTY 0x0004 | |
268 | #define OF_RECONFIG_UPDATE_PROPERTY 0x0005 | |
269 | ||
270 | struct of_prop_reconfig { | |
271 | struct device_node *dn; | |
272 | struct property *prop; | |
273 | }; | |
274 | ||
275 | extern int of_reconfig_notifier_register(struct notifier_block *); | |
276 | extern int of_reconfig_notifier_unregister(struct notifier_block *); | |
277 | extern int of_reconfig_notify(unsigned long, void *); | |
278 | ||
279 | extern int of_attach_node(struct device_node *); | |
280 | extern int of_detach_node(struct device_node *); | |
fcdeb7fe | 281 | |
3a1e362e | 282 | #define of_match_ptr(_ptr) (_ptr) |
c541adc6 SW |
283 | |
284 | /* | |
285 | * struct property *prop; | |
286 | * const __be32 *p; | |
287 | * u32 u; | |
288 | * | |
289 | * of_property_for_each_u32(np, "propname", prop, p, u) | |
290 | * printk("U32 value: %x\n", u); | |
291 | */ | |
292 | const __be32 *of_prop_next_u32(struct property *prop, const __be32 *cur, | |
293 | u32 *pu); | |
c541adc6 SW |
294 | /* |
295 | * struct property *prop; | |
296 | * const char *s; | |
297 | * | |
298 | * of_property_for_each_string(np, "propname", prop, s) | |
299 | * printk("String value: %s\n", s); | |
300 | */ | |
301 | const char *of_prop_next_string(struct property *prop, const char *cur); | |
c541adc6 | 302 | |
5c19e952 SH |
303 | int of_device_is_stdout_path(struct device_node *dn); |
304 | ||
b98c0239 | 305 | #else /* CONFIG_OF */ |
3bcbaf6e | 306 | |
74a7f084 GL |
307 | static inline const char* of_node_full_name(struct device_node *np) |
308 | { | |
309 | return "<no-node>"; | |
310 | } | |
311 | ||
1cc44f43 PU |
312 | static inline struct device_node *of_find_node_by_name(struct device_node *from, |
313 | const char *name) | |
314 | { | |
315 | return NULL; | |
316 | } | |
317 | ||
662372e4 RH |
318 | static inline struct device_node *of_find_node_by_type(struct device_node *from, |
319 | const char *type) | |
066ec1dd AS |
320 | { |
321 | return NULL; | |
322 | } | |
323 | ||
662372e4 RH |
324 | static inline struct device_node *of_find_matching_node_and_match( |
325 | struct device_node *from, | |
326 | const struct of_device_id *matches, | |
327 | const struct of_device_id **match) | |
3bcbaf6e | 328 | { |
662372e4 | 329 | return NULL; |
3bcbaf6e SAS |
330 | } |
331 | ||
662372e4 | 332 | static inline struct device_node *of_get_parent(const struct device_node *node) |
00b2c76a | 333 | { |
662372e4 | 334 | return NULL; |
00b2c76a DH |
335 | } |
336 | ||
662372e4 RH |
337 | static inline struct device_node *of_get_next_child( |
338 | const struct device_node *node, struct device_node *prev) | |
339 | { | |
340 | return NULL; | |
341 | } | |
aba3dfff | 342 | |
662372e4 RH |
343 | static inline struct device_node *of_get_next_available_child( |
344 | const struct device_node *node, struct device_node *prev) | |
345 | { | |
346 | return NULL; | |
347 | } | |
f6f0747e | 348 | |
662372e4 RH |
349 | static inline struct device_node *of_find_node_with_property( |
350 | struct device_node *from, const char *prop_name) | |
25c040c9 OJ |
351 | { |
352 | return NULL; | |
353 | } | |
354 | ||
662372e4 | 355 | static inline bool of_have_populated_dt(void) |
183f1d0c | 356 | { |
662372e4 | 357 | return false; |
183f1d0c DA |
358 | } |
359 | ||
662372e4 RH |
360 | static inline struct device_node *of_get_child_by_name( |
361 | const struct device_node *node, | |
362 | const char *name) | |
954e04b9 | 363 | { |
662372e4 | 364 | return NULL; |
954e04b9 BW |
365 | } |
366 | ||
36a0904e RN |
367 | static inline int of_device_is_compatible(const struct device_node *device, |
368 | const char *name) | |
369 | { | |
370 | return 0; | |
371 | } | |
372 | ||
d7195696 RH |
373 | static inline int of_device_is_available(const struct device_node *device) |
374 | { | |
375 | return 0; | |
376 | } | |
377 | ||
aba3dfff SW |
378 | static inline struct property *of_find_property(const struct device_node *np, |
379 | const char *name, | |
380 | int *lenp) | |
381 | { | |
382 | return NULL; | |
383 | } | |
384 | ||
2261cc62 SG |
385 | static inline struct device_node *of_find_compatible_node( |
386 | struct device_node *from, | |
387 | const char *type, | |
388 | const char *compat) | |
389 | { | |
390 | return NULL; | |
391 | } | |
392 | ||
3daf3726 TP |
393 | static inline int of_property_read_u32_index(const struct device_node *np, |
394 | const char *propname, u32 index, u32 *out_value) | |
395 | { | |
396 | return -ENOSYS; | |
397 | } | |
398 | ||
be193249 VK |
399 | static inline int of_property_read_u8_array(const struct device_node *np, |
400 | const char *propname, u8 *out_values, size_t sz) | |
401 | { | |
402 | return -ENOSYS; | |
403 | } | |
404 | ||
405 | static inline int of_property_read_u16_array(const struct device_node *np, | |
406 | const char *propname, u16 *out_values, size_t sz) | |
407 | { | |
408 | return -ENOSYS; | |
409 | } | |
410 | ||
b98c0239 | 411 | static inline int of_property_read_u32_array(const struct device_node *np, |
aac285c6 JI |
412 | const char *propname, |
413 | u32 *out_values, size_t sz) | |
b98c0239 SG |
414 | { |
415 | return -ENOSYS; | |
416 | } | |
417 | ||
418 | static inline int of_property_read_string(struct device_node *np, | |
aac285c6 JI |
419 | const char *propname, |
420 | const char **out_string) | |
b98c0239 SG |
421 | { |
422 | return -ENOSYS; | |
423 | } | |
424 | ||
4fcd15a0 BC |
425 | static inline int of_property_read_string_index(struct device_node *np, |
426 | const char *propname, int index, | |
427 | const char **out_string) | |
428 | { | |
429 | return -ENOSYS; | |
430 | } | |
431 | ||
432 | static inline int of_property_count_strings(struct device_node *np, | |
433 | const char *propname) | |
434 | { | |
435 | return -ENOSYS; | |
436 | } | |
437 | ||
89272b8c SW |
438 | static inline const void *of_get_property(const struct device_node *node, |
439 | const char *name, | |
440 | int *lenp) | |
441 | { | |
442 | return NULL; | |
443 | } | |
444 | ||
183912d3 SK |
445 | static inline struct device_node *of_get_cpu_node(int cpu, |
446 | unsigned int *thread) | |
447 | { | |
448 | return NULL; | |
449 | } | |
450 | ||
4cd7f7a3 JI |
451 | static inline int of_property_read_u64(const struct device_node *np, |
452 | const char *propname, u64 *out_value) | |
453 | { | |
454 | return -ENOSYS; | |
455 | } | |
456 | ||
bd3d5500 TR |
457 | static inline int of_property_match_string(struct device_node *np, |
458 | const char *propname, | |
459 | const char *string) | |
460 | { | |
461 | return -ENOSYS; | |
462 | } | |
463 | ||
b8fbdc42 | 464 | static inline struct device_node *of_parse_phandle(const struct device_node *np, |
36a0904e RN |
465 | const char *phandle_name, |
466 | int index) | |
467 | { | |
468 | return NULL; | |
469 | } | |
470 | ||
e05e5070 TR |
471 | static inline int of_parse_phandle_with_args(struct device_node *np, |
472 | const char *list_name, | |
473 | const char *cells_name, | |
474 | int index, | |
475 | struct of_phandle_args *out_args) | |
476 | { | |
477 | return -ENOSYS; | |
478 | } | |
479 | ||
035fd948 SW |
480 | static inline int of_parse_phandle_with_fixed_args(const struct device_node *np, |
481 | const char *list_name, int cells_count, int index, | |
482 | struct of_phandle_args *out_args) | |
483 | { | |
484 | return -ENOSYS; | |
485 | } | |
486 | ||
bd69f73f GL |
487 | static inline int of_count_phandle_with_args(struct device_node *np, |
488 | const char *list_name, | |
489 | const char *cells_name) | |
490 | { | |
491 | return -ENOSYS; | |
492 | } | |
493 | ||
ed5f886d NF |
494 | static inline int of_alias_get_id(struct device_node *np, const char *stem) |
495 | { | |
496 | return -ENOSYS; | |
497 | } | |
498 | ||
50e07f88 SW |
499 | static inline int of_machine_is_compatible(const char *compat) |
500 | { | |
501 | return 0; | |
502 | } | |
503 | ||
5c19e952 SH |
504 | static inline int of_device_is_stdout_path(struct device_node *dn) |
505 | { | |
506 | return 0; | |
507 | } | |
508 | ||
2adfffa2 SAS |
509 | static inline const __be32 *of_prop_next_u32(struct property *prop, |
510 | const __be32 *cur, u32 *pu) | |
511 | { | |
512 | return NULL; | |
513 | } | |
514 | ||
515 | static inline const char *of_prop_next_string(struct property *prop, | |
516 | const char *cur) | |
517 | { | |
518 | return NULL; | |
519 | } | |
520 | ||
3a1e362e | 521 | #define of_match_ptr(_ptr) NULL |
5762c205 | 522 | #define of_match_node(_matches, _node) NULL |
9dfbf207 | 523 | #endif /* CONFIG_OF */ |
b98c0239 | 524 | |
0c3f061c RH |
525 | #if defined(CONFIG_OF) && defined(CONFIG_NUMA) |
526 | extern int of_node_to_nid(struct device_node *np); | |
527 | #else | |
528 | static inline int of_node_to_nid(struct device_node *device) { return 0; } | |
5ca4db61 PM |
529 | #endif |
530 | ||
662372e4 RH |
531 | static inline struct device_node *of_find_matching_node( |
532 | struct device_node *from, | |
533 | const struct of_device_id *matches) | |
534 | { | |
535 | return of_find_matching_node_and_match(from, matches, NULL); | |
536 | } | |
537 | ||
fa4d34cc JCPV |
538 | /** |
539 | * of_property_read_bool - Findfrom a property | |
540 | * @np: device node from which the property value is to be read. | |
541 | * @propname: name of the property to be searched. | |
542 | * | |
543 | * Search for a property in a device node. | |
544 | * Returns true if the property exist false otherwise. | |
545 | */ | |
546 | static inline bool of_property_read_bool(const struct device_node *np, | |
547 | const char *propname) | |
548 | { | |
549 | struct property *prop = of_find_property(np, propname, NULL); | |
550 | ||
551 | return prop ? true : false; | |
552 | } | |
553 | ||
be193249 VK |
554 | static inline int of_property_read_u8(const struct device_node *np, |
555 | const char *propname, | |
556 | u8 *out_value) | |
557 | { | |
558 | return of_property_read_u8_array(np, propname, out_value, 1); | |
559 | } | |
560 | ||
561 | static inline int of_property_read_u16(const struct device_node *np, | |
562 | const char *propname, | |
563 | u16 *out_value) | |
564 | { | |
565 | return of_property_read_u16_array(np, propname, out_value, 1); | |
566 | } | |
567 | ||
b98c0239 | 568 | static inline int of_property_read_u32(const struct device_node *np, |
aac285c6 | 569 | const char *propname, |
b98c0239 SG |
570 | u32 *out_value) |
571 | { | |
572 | return of_property_read_u32_array(np, propname, out_value, 1); | |
573 | } | |
574 | ||
2adfffa2 SAS |
575 | #define of_property_for_each_u32(np, propname, prop, p, u) \ |
576 | for (prop = of_find_property(np, propname, NULL), \ | |
577 | p = of_prop_next_u32(prop, NULL, &u); \ | |
578 | p; \ | |
579 | p = of_prop_next_u32(prop, p, &u)) | |
580 | ||
581 | #define of_property_for_each_string(np, propname, prop, s) \ | |
582 | for (prop = of_find_property(np, propname, NULL), \ | |
583 | s = of_prop_next_string(prop, NULL); \ | |
584 | s; \ | |
585 | s = of_prop_next_string(prop, s)) | |
586 | ||
662372e4 RH |
587 | #define for_each_node_by_name(dn, name) \ |
588 | for (dn = of_find_node_by_name(NULL, name); dn; \ | |
589 | dn = of_find_node_by_name(dn, name)) | |
590 | #define for_each_node_by_type(dn, type) \ | |
591 | for (dn = of_find_node_by_type(NULL, type); dn; \ | |
592 | dn = of_find_node_by_type(dn, type)) | |
593 | #define for_each_compatible_node(dn, type, compatible) \ | |
594 | for (dn = of_find_compatible_node(NULL, type, compatible); dn; \ | |
595 | dn = of_find_compatible_node(dn, type, compatible)) | |
596 | #define for_each_matching_node(dn, matches) \ | |
597 | for (dn = of_find_matching_node(NULL, matches); dn; \ | |
598 | dn = of_find_matching_node(dn, matches)) | |
599 | #define for_each_matching_node_and_match(dn, matches, match) \ | |
600 | for (dn = of_find_matching_node_and_match(NULL, matches, match); \ | |
601 | dn; dn = of_find_matching_node_and_match(dn, matches, match)) | |
602 | ||
603 | #define for_each_child_of_node(parent, child) \ | |
604 | for (child = of_get_next_child(parent, NULL); child != NULL; \ | |
605 | child = of_get_next_child(parent, child)) | |
606 | #define for_each_available_child_of_node(parent, child) \ | |
607 | for (child = of_get_next_available_child(parent, NULL); child != NULL; \ | |
608 | child = of_get_next_available_child(parent, child)) | |
609 | ||
610 | #define for_each_node_with_property(dn, prop_name) \ | |
611 | for (dn = of_find_node_with_property(NULL, prop_name); dn; \ | |
612 | dn = of_find_node_with_property(dn, prop_name)) | |
613 | ||
614 | static inline int of_get_child_count(const struct device_node *np) | |
615 | { | |
616 | struct device_node *child; | |
617 | int num = 0; | |
618 | ||
619 | for_each_child_of_node(np, child) | |
620 | num++; | |
621 | ||
622 | return num; | |
623 | } | |
624 | ||
625 | static inline int of_get_available_child_count(const struct device_node *np) | |
626 | { | |
627 | struct device_node *child; | |
628 | int num = 0; | |
629 | ||
630 | for_each_available_child_of_node(np, child) | |
631 | num++; | |
632 | ||
633 | return num; | |
634 | } | |
635 | ||
34db8aaf DH |
636 | #if defined(CONFIG_PROC_FS) && defined(CONFIG_PROC_DEVICETREE) |
637 | extern void proc_device_tree_add_node(struct device_node *, struct proc_dir_entry *); | |
638 | extern void proc_device_tree_add_prop(struct proc_dir_entry *pde, struct property *prop); | |
639 | extern void proc_device_tree_remove_prop(struct proc_dir_entry *pde, | |
640 | struct property *prop); | |
641 | extern void proc_device_tree_update_prop(struct proc_dir_entry *pde, | |
642 | struct property *newprop, | |
643 | struct property *oldprop); | |
644 | #endif | |
645 | ||
76c1ce78 | 646 | #endif /* _LINUX_OF_H */ |