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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 | |
76c1ce78 SR |
139 | #include <asm/prom.h> |
140 | ||
7c7b60cb GL |
141 | /* Default #address and #size cells. Allow arch asm/prom.h to override */ |
142 | #if !defined(OF_ROOT_NODE_ADDR_CELLS_DEFAULT) | |
143 | #define OF_ROOT_NODE_ADDR_CELLS_DEFAULT 1 | |
144 | #define OF_ROOT_NODE_SIZE_CELLS_DEFAULT 1 | |
145 | #endif | |
146 | ||
147 | /* Default string compare functions, Allow arch asm/prom.h to override */ | |
148 | #if !defined(of_compat_cmp) | |
1976152f | 149 | #define of_compat_cmp(s1, s2, l) strcasecmp((s1), (s2)) |
7c7b60cb GL |
150 | #define of_prop_cmp(s1, s2) strcmp((s1), (s2)) |
151 | #define of_node_cmp(s1, s2) strcasecmp((s1), (s2)) | |
152 | #endif | |
153 | ||
76c1ce78 SR |
154 | /* flag descriptions */ |
155 | #define OF_DYNAMIC 1 /* node and properties were allocated via kmalloc */ | |
156 | #define OF_DETACHED 2 /* node has been detached from the device tree */ | |
157 | ||
61e955db GL |
158 | #define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags) |
159 | #define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags) | |
160 | ||
76c1ce78 SR |
161 | #define OF_BAD_ADDR ((u64)-1) |
162 | ||
c0a05bf0 | 163 | static inline const char *of_node_full_name(const struct device_node *np) |
74a7f084 GL |
164 | { |
165 | return np ? np->full_name : "<no-node>"; | |
166 | } | |
167 | ||
76c1ce78 SR |
168 | extern struct device_node *of_find_node_by_name(struct device_node *from, |
169 | const char *name); | |
170 | #define for_each_node_by_name(dn, name) \ | |
171 | for (dn = of_find_node_by_name(NULL, name); dn; \ | |
172 | dn = of_find_node_by_name(dn, name)) | |
173 | extern struct device_node *of_find_node_by_type(struct device_node *from, | |
174 | const char *type); | |
175 | #define for_each_node_by_type(dn, type) \ | |
176 | for (dn = of_find_node_by_type(NULL, type); dn; \ | |
177 | dn = of_find_node_by_type(dn, type)) | |
178 | extern struct device_node *of_find_compatible_node(struct device_node *from, | |
179 | const char *type, const char *compat); | |
180 | #define for_each_compatible_node(dn, type, compatible) \ | |
181 | for (dn = of_find_compatible_node(NULL, type, compatible); dn; \ | |
182 | dn = of_find_compatible_node(dn, type, compatible)) | |
50c8af4c SW |
183 | extern struct device_node *of_find_matching_node_and_match( |
184 | struct device_node *from, | |
185 | const struct of_device_id *matches, | |
186 | const struct of_device_id **match); | |
187 | static inline struct device_node *of_find_matching_node( | |
188 | struct device_node *from, | |
189 | const struct of_device_id *matches) | |
190 | { | |
191 | return of_find_matching_node_and_match(from, matches, NULL); | |
192 | } | |
283029d1 GL |
193 | #define for_each_matching_node(dn, matches) \ |
194 | for (dn = of_find_matching_node(NULL, matches); dn; \ | |
195 | dn = of_find_matching_node(dn, matches)) | |
50c8af4c SW |
196 | #define for_each_matching_node_and_match(dn, matches, match) \ |
197 | for (dn = of_find_matching_node_and_match(NULL, matches, match); \ | |
198 | dn; dn = of_find_matching_node_and_match(dn, matches, match)) | |
76c1ce78 SR |
199 | extern struct device_node *of_find_node_by_path(const char *path); |
200 | extern struct device_node *of_find_node_by_phandle(phandle handle); | |
201 | extern struct device_node *of_get_parent(const struct device_node *node); | |
f4eb0107 | 202 | extern struct device_node *of_get_next_parent(struct device_node *node); |
76c1ce78 SR |
203 | extern struct device_node *of_get_next_child(const struct device_node *node, |
204 | struct device_node *prev); | |
3296193d TT |
205 | extern struct device_node *of_get_next_available_child( |
206 | const struct device_node *node, struct device_node *prev); | |
207 | ||
9c19761a SK |
208 | extern struct device_node *of_get_child_by_name(const struct device_node *node, |
209 | const char *name); | |
aabc08dc ME |
210 | #define for_each_child_of_node(parent, child) \ |
211 | for (child = of_get_next_child(parent, NULL); child != NULL; \ | |
212 | child = of_get_next_child(parent, child)) | |
213 | ||
3296193d TT |
214 | #define for_each_available_child_of_node(parent, child) \ |
215 | for (child = of_get_next_available_child(parent, NULL); child != NULL; \ | |
216 | child = of_get_next_available_child(parent, child)) | |
217 | ||
183f1d0c DA |
218 | static inline int of_get_child_count(const struct device_node *np) |
219 | { | |
220 | struct device_node *child; | |
221 | int num = 0; | |
222 | ||
223 | for_each_child_of_node(np, child) | |
224 | num++; | |
225 | ||
226 | return num; | |
227 | } | |
228 | ||
1e291b14 ME |
229 | extern struct device_node *of_find_node_with_property( |
230 | struct device_node *from, const char *prop_name); | |
231 | #define for_each_node_with_property(dn, prop_name) \ | |
232 | for (dn = of_find_node_with_property(NULL, prop_name); dn; \ | |
233 | dn = of_find_node_with_property(dn, prop_name)) | |
234 | ||
76c1ce78 SR |
235 | extern struct property *of_find_property(const struct device_node *np, |
236 | const char *name, | |
237 | int *lenp); | |
3daf3726 TP |
238 | extern int of_property_read_u32_index(const struct device_node *np, |
239 | const char *propname, | |
240 | u32 index, u32 *out_value); | |
be193249 VK |
241 | extern int of_property_read_u8_array(const struct device_node *np, |
242 | const char *propname, u8 *out_values, size_t sz); | |
243 | extern int of_property_read_u16_array(const struct device_node *np, | |
244 | const char *propname, u16 *out_values, size_t sz); | |
0e373639 | 245 | extern int of_property_read_u32_array(const struct device_node *np, |
aac285c6 | 246 | const char *propname, |
0e373639 RH |
247 | u32 *out_values, |
248 | size_t sz); | |
4cd7f7a3 JI |
249 | extern int of_property_read_u64(const struct device_node *np, |
250 | const char *propname, u64 *out_value); | |
0e373639 | 251 | |
aac285c6 JI |
252 | extern int of_property_read_string(struct device_node *np, |
253 | const char *propname, | |
254 | const char **out_string); | |
4fcd15a0 BC |
255 | extern int of_property_read_string_index(struct device_node *np, |
256 | const char *propname, | |
257 | int index, const char **output); | |
7aff0fe3 GL |
258 | extern int of_property_match_string(struct device_node *np, |
259 | const char *propname, | |
260 | const char *string); | |
4fcd15a0 BC |
261 | extern int of_property_count_strings(struct device_node *np, |
262 | const char *propname); | |
76c1ce78 SR |
263 | extern int of_device_is_compatible(const struct device_node *device, |
264 | const char *); | |
834d97d4 | 265 | extern int of_device_is_available(const struct device_node *device); |
76c1ce78 SR |
266 | extern const void *of_get_property(const struct device_node *node, |
267 | const char *name, | |
268 | int *lenp); | |
8af0da93 DA |
269 | #define for_each_property_of_node(dn, pp) \ |
270 | for (pp = dn->properties; pp != NULL; pp = pp->next) | |
611cad72 | 271 | |
76c1ce78 SR |
272 | extern int of_n_addr_cells(struct device_node *np); |
273 | extern int of_n_size_cells(struct device_node *np); | |
283029d1 GL |
274 | extern const struct of_device_id *of_match_node( |
275 | const struct of_device_id *matches, const struct device_node *node); | |
3f07af49 | 276 | extern int of_modalias_node(struct device_node *node, char *modalias, int len); |
b8fbdc42 | 277 | extern struct device_node *of_parse_phandle(const struct device_node *np, |
739649c5 GL |
278 | const char *phandle_name, |
279 | int index); | |
93c667ca | 280 | extern int of_parse_phandle_with_args(const struct device_node *np, |
64b60e09 | 281 | const char *list_name, const char *cells_name, int index, |
15c9a0ac | 282 | struct of_phandle_args *out_args); |
bd69f73f GL |
283 | extern int of_count_phandle_with_args(const struct device_node *np, |
284 | const char *list_name, const char *cells_name); | |
76c1ce78 | 285 | |
611cad72 SG |
286 | extern void of_alias_scan(void * (*dt_alloc)(u64 size, u64 align)); |
287 | extern int of_alias_get_id(struct device_node *np, const char *stem); | |
288 | ||
21b082ec GL |
289 | extern int of_machine_is_compatible(const char *compat); |
290 | ||
79d1c712 NF |
291 | extern int of_add_property(struct device_node *np, struct property *prop); |
292 | extern int of_remove_property(struct device_node *np, struct property *prop); | |
293 | extern int of_update_property(struct device_node *np, struct property *newprop); | |
21b082ec | 294 | |
fcdeb7fe | 295 | /* For updating the device tree at runtime */ |
1cf3d8b3 NF |
296 | #define OF_RECONFIG_ATTACH_NODE 0x0001 |
297 | #define OF_RECONFIG_DETACH_NODE 0x0002 | |
298 | #define OF_RECONFIG_ADD_PROPERTY 0x0003 | |
299 | #define OF_RECONFIG_REMOVE_PROPERTY 0x0004 | |
300 | #define OF_RECONFIG_UPDATE_PROPERTY 0x0005 | |
301 | ||
302 | struct of_prop_reconfig { | |
303 | struct device_node *dn; | |
304 | struct property *prop; | |
305 | }; | |
306 | ||
307 | extern int of_reconfig_notifier_register(struct notifier_block *); | |
308 | extern int of_reconfig_notifier_unregister(struct notifier_block *); | |
309 | extern int of_reconfig_notify(unsigned long, void *); | |
310 | ||
311 | extern int of_attach_node(struct device_node *); | |
312 | extern int of_detach_node(struct device_node *); | |
fcdeb7fe | 313 | |
3a1e362e | 314 | #define of_match_ptr(_ptr) (_ptr) |
c541adc6 SW |
315 | |
316 | /* | |
317 | * struct property *prop; | |
318 | * const __be32 *p; | |
319 | * u32 u; | |
320 | * | |
321 | * of_property_for_each_u32(np, "propname", prop, p, u) | |
322 | * printk("U32 value: %x\n", u); | |
323 | */ | |
324 | const __be32 *of_prop_next_u32(struct property *prop, const __be32 *cur, | |
325 | u32 *pu); | |
326 | #define of_property_for_each_u32(np, propname, prop, p, u) \ | |
327 | for (prop = of_find_property(np, propname, NULL), \ | |
328 | p = of_prop_next_u32(prop, NULL, &u); \ | |
329 | p; \ | |
330 | p = of_prop_next_u32(prop, p, &u)) | |
331 | ||
332 | /* | |
333 | * struct property *prop; | |
334 | * const char *s; | |
335 | * | |
336 | * of_property_for_each_string(np, "propname", prop, s) | |
337 | * printk("String value: %s\n", s); | |
338 | */ | |
339 | const char *of_prop_next_string(struct property *prop, const char *cur); | |
340 | #define of_property_for_each_string(np, propname, prop, s) \ | |
341 | for (prop = of_find_property(np, propname, NULL), \ | |
342 | s = of_prop_next_string(prop, NULL); \ | |
343 | s; \ | |
344 | s = of_prop_next_string(prop, s)) | |
345 | ||
b98c0239 | 346 | #else /* CONFIG_OF */ |
3bcbaf6e | 347 | |
74a7f084 GL |
348 | static inline const char* of_node_full_name(struct device_node *np) |
349 | { | |
350 | return "<no-node>"; | |
351 | } | |
352 | ||
1cc44f43 PU |
353 | static inline struct device_node *of_find_node_by_name(struct device_node *from, |
354 | const char *name) | |
355 | { | |
356 | return NULL; | |
357 | } | |
358 | ||
066ec1dd AS |
359 | static inline struct device_node *of_get_parent(const struct device_node *node) |
360 | { | |
361 | return NULL; | |
362 | } | |
363 | ||
3bcbaf6e SAS |
364 | static inline bool of_have_populated_dt(void) |
365 | { | |
366 | return false; | |
367 | } | |
368 | ||
aba3dfff SW |
369 | #define for_each_child_of_node(parent, child) \ |
370 | while (0) | |
371 | ||
25c040c9 OJ |
372 | static inline struct device_node *of_get_child_by_name( |
373 | const struct device_node *node, | |
374 | const char *name) | |
375 | { | |
376 | return NULL; | |
377 | } | |
378 | ||
183f1d0c DA |
379 | static inline int of_get_child_count(const struct device_node *np) |
380 | { | |
381 | return 0; | |
382 | } | |
383 | ||
36a0904e RN |
384 | static inline int of_device_is_compatible(const struct device_node *device, |
385 | const char *name) | |
386 | { | |
387 | return 0; | |
388 | } | |
389 | ||
d7195696 RH |
390 | static inline int of_device_is_available(const struct device_node *device) |
391 | { | |
392 | return 0; | |
393 | } | |
394 | ||
aba3dfff SW |
395 | static inline struct property *of_find_property(const struct device_node *np, |
396 | const char *name, | |
397 | int *lenp) | |
398 | { | |
399 | return NULL; | |
400 | } | |
401 | ||
2261cc62 SG |
402 | static inline struct device_node *of_find_compatible_node( |
403 | struct device_node *from, | |
404 | const char *type, | |
405 | const char *compat) | |
406 | { | |
407 | return NULL; | |
408 | } | |
409 | ||
3daf3726 TP |
410 | static inline int of_property_read_u32_index(const struct device_node *np, |
411 | const char *propname, u32 index, u32 *out_value) | |
412 | { | |
413 | return -ENOSYS; | |
414 | } | |
415 | ||
be193249 VK |
416 | static inline int of_property_read_u8_array(const struct device_node *np, |
417 | const char *propname, u8 *out_values, size_t sz) | |
418 | { | |
419 | return -ENOSYS; | |
420 | } | |
421 | ||
422 | static inline int of_property_read_u16_array(const struct device_node *np, | |
423 | const char *propname, u16 *out_values, size_t sz) | |
424 | { | |
425 | return -ENOSYS; | |
426 | } | |
427 | ||
b98c0239 | 428 | static inline int of_property_read_u32_array(const struct device_node *np, |
aac285c6 JI |
429 | const char *propname, |
430 | u32 *out_values, size_t sz) | |
b98c0239 SG |
431 | { |
432 | return -ENOSYS; | |
433 | } | |
434 | ||
435 | static inline int of_property_read_string(struct device_node *np, | |
aac285c6 JI |
436 | const char *propname, |
437 | const char **out_string) | |
b98c0239 SG |
438 | { |
439 | return -ENOSYS; | |
440 | } | |
441 | ||
4fcd15a0 BC |
442 | static inline int of_property_read_string_index(struct device_node *np, |
443 | const char *propname, int index, | |
444 | const char **out_string) | |
445 | { | |
446 | return -ENOSYS; | |
447 | } | |
448 | ||
449 | static inline int of_property_count_strings(struct device_node *np, | |
450 | const char *propname) | |
451 | { | |
452 | return -ENOSYS; | |
453 | } | |
454 | ||
89272b8c SW |
455 | static inline const void *of_get_property(const struct device_node *node, |
456 | const char *name, | |
457 | int *lenp) | |
458 | { | |
459 | return NULL; | |
460 | } | |
461 | ||
4cd7f7a3 JI |
462 | static inline int of_property_read_u64(const struct device_node *np, |
463 | const char *propname, u64 *out_value) | |
464 | { | |
465 | return -ENOSYS; | |
466 | } | |
467 | ||
bd3d5500 TR |
468 | static inline int of_property_match_string(struct device_node *np, |
469 | const char *propname, | |
470 | const char *string) | |
471 | { | |
472 | return -ENOSYS; | |
473 | } | |
474 | ||
b8fbdc42 | 475 | static inline struct device_node *of_parse_phandle(const struct device_node *np, |
36a0904e RN |
476 | const char *phandle_name, |
477 | int index) | |
478 | { | |
479 | return NULL; | |
480 | } | |
481 | ||
e05e5070 TR |
482 | static inline int of_parse_phandle_with_args(struct device_node *np, |
483 | const char *list_name, | |
484 | const char *cells_name, | |
485 | int index, | |
486 | struct of_phandle_args *out_args) | |
487 | { | |
488 | return -ENOSYS; | |
489 | } | |
490 | ||
bd69f73f GL |
491 | static inline int of_count_phandle_with_args(struct device_node *np, |
492 | const char *list_name, | |
493 | const char *cells_name) | |
494 | { | |
495 | return -ENOSYS; | |
496 | } | |
497 | ||
ed5f886d NF |
498 | static inline int of_alias_get_id(struct device_node *np, const char *stem) |
499 | { | |
500 | return -ENOSYS; | |
501 | } | |
502 | ||
50e07f88 SW |
503 | static inline int of_machine_is_compatible(const char *compat) |
504 | { | |
505 | return 0; | |
506 | } | |
507 | ||
3a1e362e | 508 | #define of_match_ptr(_ptr) NULL |
5762c205 | 509 | #define of_match_node(_matches, _node) NULL |
c541adc6 SW |
510 | #define of_property_for_each_u32(np, propname, prop, p, u) \ |
511 | while (0) | |
512 | #define of_property_for_each_string(np, propname, prop, s) \ | |
513 | while (0) | |
9dfbf207 | 514 | #endif /* CONFIG_OF */ |
b98c0239 | 515 | |
5ca4db61 PM |
516 | #ifndef of_node_to_nid |
517 | static inline int of_node_to_nid(struct device_node *np) | |
518 | { | |
519 | return numa_node_id(); | |
520 | } | |
521 | ||
522 | #define of_node_to_nid of_node_to_nid | |
523 | #endif | |
524 | ||
fa4d34cc JCPV |
525 | /** |
526 | * of_property_read_bool - Findfrom a property | |
527 | * @np: device node from which the property value is to be read. | |
528 | * @propname: name of the property to be searched. | |
529 | * | |
530 | * Search for a property in a device node. | |
531 | * Returns true if the property exist false otherwise. | |
532 | */ | |
533 | static inline bool of_property_read_bool(const struct device_node *np, | |
534 | const char *propname) | |
535 | { | |
536 | struct property *prop = of_find_property(np, propname, NULL); | |
537 | ||
538 | return prop ? true : false; | |
539 | } | |
540 | ||
be193249 VK |
541 | static inline int of_property_read_u8(const struct device_node *np, |
542 | const char *propname, | |
543 | u8 *out_value) | |
544 | { | |
545 | return of_property_read_u8_array(np, propname, out_value, 1); | |
546 | } | |
547 | ||
548 | static inline int of_property_read_u16(const struct device_node *np, | |
549 | const char *propname, | |
550 | u16 *out_value) | |
551 | { | |
552 | return of_property_read_u16_array(np, propname, out_value, 1); | |
553 | } | |
554 | ||
b98c0239 | 555 | static inline int of_property_read_u32(const struct device_node *np, |
aac285c6 | 556 | const char *propname, |
b98c0239 SG |
557 | u32 *out_value) |
558 | { | |
559 | return of_property_read_u32_array(np, propname, out_value, 1); | |
560 | } | |
561 | ||
34db8aaf DH |
562 | #if defined(CONFIG_PROC_FS) && defined(CONFIG_PROC_DEVICETREE) |
563 | extern void proc_device_tree_add_node(struct device_node *, struct proc_dir_entry *); | |
564 | extern void proc_device_tree_add_prop(struct proc_dir_entry *pde, struct property *prop); | |
565 | extern void proc_device_tree_remove_prop(struct proc_dir_entry *pde, | |
566 | struct property *prop); | |
567 | extern void proc_device_tree_update_prop(struct proc_dir_entry *pde, | |
568 | struct property *newprop, | |
569 | struct property *oldprop); | |
570 | #endif | |
571 | ||
76c1ce78 | 572 | #endif /* _LINUX_OF_H */ |