| 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> |
| 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 | |
| 27 | #include <asm/byteorder.h> |
| 28 | #include <asm/errno.h> |
| 29 | |
| 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 | struct bin_attribute attr; |
| 41 | }; |
| 42 | |
| 43 | #if defined(CONFIG_SPARC) |
| 44 | struct of_irq_controller; |
| 45 | #endif |
| 46 | |
| 47 | struct device_node { |
| 48 | const char *name; |
| 49 | const char *type; |
| 50 | phandle phandle; |
| 51 | const char *full_name; |
| 52 | |
| 53 | struct property *properties; |
| 54 | struct property *deadprops; /* removed properties */ |
| 55 | struct device_node *parent; |
| 56 | struct device_node *child; |
| 57 | struct device_node *sibling; |
| 58 | struct device_node *next; /* next device of same type */ |
| 59 | struct device_node *allnext; /* next in list of all nodes */ |
| 60 | struct kobject kobj; |
| 61 | unsigned long _flags; |
| 62 | void *data; |
| 63 | #if defined(CONFIG_SPARC) |
| 64 | const char *path_component_name; |
| 65 | unsigned int unique_id; |
| 66 | struct of_irq_controller *irq_trans; |
| 67 | #endif |
| 68 | }; |
| 69 | |
| 70 | #define MAX_PHANDLE_ARGS 16 |
| 71 | struct of_phandle_args { |
| 72 | struct device_node *np; |
| 73 | int args_count; |
| 74 | uint32_t args[MAX_PHANDLE_ARGS]; |
| 75 | }; |
| 76 | |
| 77 | /* initialize a node */ |
| 78 | extern struct kobj_type of_node_ktype; |
| 79 | static inline void of_node_init(struct device_node *node) |
| 80 | { |
| 81 | kobject_init(&node->kobj, &of_node_ktype); |
| 82 | } |
| 83 | |
| 84 | /* true when node is initialized */ |
| 85 | static inline int of_node_is_initialized(struct device_node *node) |
| 86 | { |
| 87 | return node && node->kobj.state_initialized; |
| 88 | } |
| 89 | |
| 90 | /* true when node is attached (i.e. present on sysfs) */ |
| 91 | static inline int of_node_is_attached(struct device_node *node) |
| 92 | { |
| 93 | return node && node->kobj.state_in_sysfs; |
| 94 | } |
| 95 | |
| 96 | #ifdef CONFIG_OF_DYNAMIC |
| 97 | extern struct device_node *of_node_get(struct device_node *node); |
| 98 | extern void of_node_put(struct device_node *node); |
| 99 | #else /* CONFIG_OF_DYNAMIC */ |
| 100 | /* Dummy ref counting routines - to be implemented later */ |
| 101 | static inline struct device_node *of_node_get(struct device_node *node) |
| 102 | { |
| 103 | return node; |
| 104 | } |
| 105 | static inline void of_node_put(struct device_node *node) { } |
| 106 | #endif /* !CONFIG_OF_DYNAMIC */ |
| 107 | |
| 108 | #ifdef CONFIG_OF |
| 109 | |
| 110 | /* Pointer for first entry in chain of all nodes. */ |
| 111 | extern struct device_node *of_allnodes; |
| 112 | extern struct device_node *of_chosen; |
| 113 | extern struct device_node *of_aliases; |
| 114 | extern raw_spinlock_t devtree_lock; |
| 115 | |
| 116 | static inline bool of_have_populated_dt(void) |
| 117 | { |
| 118 | return of_allnodes != NULL; |
| 119 | } |
| 120 | |
| 121 | static inline bool of_node_is_root(const struct device_node *node) |
| 122 | { |
| 123 | return node && (node->parent == NULL); |
| 124 | } |
| 125 | |
| 126 | static inline int of_node_check_flag(struct device_node *n, unsigned long flag) |
| 127 | { |
| 128 | return test_bit(flag, &n->_flags); |
| 129 | } |
| 130 | |
| 131 | static inline int of_node_test_and_set_flag(struct device_node *n, |
| 132 | unsigned long flag) |
| 133 | { |
| 134 | return test_and_set_bit(flag, &n->_flags); |
| 135 | } |
| 136 | |
| 137 | static inline void of_node_set_flag(struct device_node *n, unsigned long flag) |
| 138 | { |
| 139 | set_bit(flag, &n->_flags); |
| 140 | } |
| 141 | |
| 142 | static inline void of_node_clear_flag(struct device_node *n, unsigned long flag) |
| 143 | { |
| 144 | clear_bit(flag, &n->_flags); |
| 145 | } |
| 146 | |
| 147 | static inline int of_property_check_flag(struct property *p, unsigned long flag) |
| 148 | { |
| 149 | return test_bit(flag, &p->_flags); |
| 150 | } |
| 151 | |
| 152 | static inline void of_property_set_flag(struct property *p, unsigned long flag) |
| 153 | { |
| 154 | set_bit(flag, &p->_flags); |
| 155 | } |
| 156 | |
| 157 | static inline void of_property_clear_flag(struct property *p, unsigned long flag) |
| 158 | { |
| 159 | clear_bit(flag, &p->_flags); |
| 160 | } |
| 161 | |
| 162 | extern struct device_node *of_find_all_nodes(struct device_node *prev); |
| 163 | |
| 164 | /* |
| 165 | * OF address retrieval & translation |
| 166 | */ |
| 167 | |
| 168 | /* Helper to read a big number; size is in cells (not bytes) */ |
| 169 | static inline u64 of_read_number(const __be32 *cell, int size) |
| 170 | { |
| 171 | u64 r = 0; |
| 172 | while (size--) |
| 173 | r = (r << 32) | be32_to_cpu(*(cell++)); |
| 174 | return r; |
| 175 | } |
| 176 | |
| 177 | /* Like of_read_number, but we want an unsigned long result */ |
| 178 | static inline unsigned long of_read_ulong(const __be32 *cell, int size) |
| 179 | { |
| 180 | /* toss away upper bits if unsigned long is smaller than u64 */ |
| 181 | return of_read_number(cell, size); |
| 182 | } |
| 183 | |
| 184 | #if defined(CONFIG_SPARC) |
| 185 | #include <asm/prom.h> |
| 186 | #endif |
| 187 | |
| 188 | /* Default #address and #size cells. Allow arch asm/prom.h to override */ |
| 189 | #if !defined(OF_ROOT_NODE_ADDR_CELLS_DEFAULT) |
| 190 | #define OF_ROOT_NODE_ADDR_CELLS_DEFAULT 1 |
| 191 | #define OF_ROOT_NODE_SIZE_CELLS_DEFAULT 1 |
| 192 | #endif |
| 193 | |
| 194 | /* Default string compare functions, Allow arch asm/prom.h to override */ |
| 195 | #if !defined(of_compat_cmp) |
| 196 | #define of_compat_cmp(s1, s2, l) strcasecmp((s1), (s2)) |
| 197 | #define of_prop_cmp(s1, s2) strcmp((s1), (s2)) |
| 198 | #define of_node_cmp(s1, s2) strcasecmp((s1), (s2)) |
| 199 | #endif |
| 200 | |
| 201 | /* flag descriptions */ |
| 202 | #define OF_DYNAMIC 1 /* node and properties were allocated via kmalloc */ |
| 203 | #define OF_DETACHED 2 /* node has been detached from the device tree */ |
| 204 | #define OF_POPULATED 3 /* device already created for the node */ |
| 205 | #define OF_POPULATED_BUS 4 /* of_platform_populate recursed to children of this node */ |
| 206 | |
| 207 | #define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags) |
| 208 | #define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags) |
| 209 | |
| 210 | #define OF_BAD_ADDR ((u64)-1) |
| 211 | |
| 212 | static inline const char *of_node_full_name(const struct device_node *np) |
| 213 | { |
| 214 | return np ? np->full_name : "<no-node>"; |
| 215 | } |
| 216 | |
| 217 | #define for_each_of_allnodes(dn) \ |
| 218 | for (dn = of_allnodes; dn; dn = dn->allnext) |
| 219 | extern struct device_node *of_find_node_by_name(struct device_node *from, |
| 220 | const char *name); |
| 221 | extern struct device_node *of_find_node_by_type(struct device_node *from, |
| 222 | const char *type); |
| 223 | extern struct device_node *of_find_compatible_node(struct device_node *from, |
| 224 | const char *type, const char *compat); |
| 225 | extern struct device_node *of_find_matching_node_and_match( |
| 226 | struct device_node *from, |
| 227 | const struct of_device_id *matches, |
| 228 | const struct of_device_id **match); |
| 229 | |
| 230 | extern struct device_node *of_find_node_by_path(const char *path); |
| 231 | extern struct device_node *of_find_node_by_phandle(phandle handle); |
| 232 | extern struct device_node *of_get_parent(const struct device_node *node); |
| 233 | extern struct device_node *of_get_next_parent(struct device_node *node); |
| 234 | extern struct device_node *of_get_next_child(const struct device_node *node, |
| 235 | struct device_node *prev); |
| 236 | extern struct device_node *of_get_next_available_child( |
| 237 | const struct device_node *node, struct device_node *prev); |
| 238 | |
| 239 | extern struct device_node *of_get_child_by_name(const struct device_node *node, |
| 240 | const char *name); |
| 241 | |
| 242 | /* cache lookup */ |
| 243 | extern struct device_node *of_find_next_cache_node(const struct device_node *); |
| 244 | extern struct device_node *of_find_node_with_property( |
| 245 | struct device_node *from, const char *prop_name); |
| 246 | |
| 247 | extern struct property *of_find_property(const struct device_node *np, |
| 248 | const char *name, |
| 249 | int *lenp); |
| 250 | extern int of_property_count_elems_of_size(const struct device_node *np, |
| 251 | const char *propname, int elem_size); |
| 252 | extern int of_property_read_u32_index(const struct device_node *np, |
| 253 | const char *propname, |
| 254 | u32 index, u32 *out_value); |
| 255 | extern int of_property_read_u8_array(const struct device_node *np, |
| 256 | const char *propname, u8 *out_values, size_t sz); |
| 257 | extern int of_property_read_u16_array(const struct device_node *np, |
| 258 | const char *propname, u16 *out_values, size_t sz); |
| 259 | extern int of_property_read_u32_array(const struct device_node *np, |
| 260 | const char *propname, |
| 261 | u32 *out_values, |
| 262 | size_t sz); |
| 263 | extern int of_property_read_u64(const struct device_node *np, |
| 264 | const char *propname, u64 *out_value); |
| 265 | |
| 266 | extern int of_property_read_string(struct device_node *np, |
| 267 | const char *propname, |
| 268 | const char **out_string); |
| 269 | extern int of_property_read_string_index(struct device_node *np, |
| 270 | const char *propname, |
| 271 | int index, const char **output); |
| 272 | extern int of_property_match_string(struct device_node *np, |
| 273 | const char *propname, |
| 274 | const char *string); |
| 275 | extern int of_property_count_strings(struct device_node *np, |
| 276 | const char *propname); |
| 277 | extern int of_device_is_compatible(const struct device_node *device, |
| 278 | const char *); |
| 279 | extern int of_device_is_available(const struct device_node *device); |
| 280 | extern const void *of_get_property(const struct device_node *node, |
| 281 | const char *name, |
| 282 | int *lenp); |
| 283 | extern struct device_node *of_get_cpu_node(int cpu, unsigned int *thread); |
| 284 | #define for_each_property_of_node(dn, pp) \ |
| 285 | for (pp = dn->properties; pp != NULL; pp = pp->next) |
| 286 | |
| 287 | extern int of_n_addr_cells(struct device_node *np); |
| 288 | extern int of_n_size_cells(struct device_node *np); |
| 289 | extern const struct of_device_id *of_match_node( |
| 290 | const struct of_device_id *matches, const struct device_node *node); |
| 291 | extern int of_modalias_node(struct device_node *node, char *modalias, int len); |
| 292 | extern void of_print_phandle_args(const char *msg, const struct of_phandle_args *args); |
| 293 | extern struct device_node *of_parse_phandle(const struct device_node *np, |
| 294 | const char *phandle_name, |
| 295 | int index); |
| 296 | extern int of_parse_phandle_with_args(const struct device_node *np, |
| 297 | const char *list_name, const char *cells_name, int index, |
| 298 | struct of_phandle_args *out_args); |
| 299 | extern int of_parse_phandle_with_fixed_args(const struct device_node *np, |
| 300 | const char *list_name, int cells_count, int index, |
| 301 | struct of_phandle_args *out_args); |
| 302 | extern int of_count_phandle_with_args(const struct device_node *np, |
| 303 | const char *list_name, const char *cells_name); |
| 304 | |
| 305 | extern void of_alias_scan(void * (*dt_alloc)(u64 size, u64 align)); |
| 306 | extern int of_alias_get_id(struct device_node *np, const char *stem); |
| 307 | |
| 308 | extern int of_machine_is_compatible(const char *compat); |
| 309 | |
| 310 | extern int of_add_property(struct device_node *np, struct property *prop); |
| 311 | extern int of_remove_property(struct device_node *np, struct property *prop); |
| 312 | extern int of_update_property(struct device_node *np, struct property *newprop); |
| 313 | |
| 314 | /* For updating the device tree at runtime */ |
| 315 | #define OF_RECONFIG_ATTACH_NODE 0x0001 |
| 316 | #define OF_RECONFIG_DETACH_NODE 0x0002 |
| 317 | #define OF_RECONFIG_ADD_PROPERTY 0x0003 |
| 318 | #define OF_RECONFIG_REMOVE_PROPERTY 0x0004 |
| 319 | #define OF_RECONFIG_UPDATE_PROPERTY 0x0005 |
| 320 | |
| 321 | struct of_prop_reconfig { |
| 322 | struct device_node *dn; |
| 323 | struct property *prop; |
| 324 | }; |
| 325 | |
| 326 | extern int of_reconfig_notifier_register(struct notifier_block *); |
| 327 | extern int of_reconfig_notifier_unregister(struct notifier_block *); |
| 328 | extern int of_reconfig_notify(unsigned long, void *); |
| 329 | |
| 330 | extern int of_attach_node(struct device_node *); |
| 331 | extern int of_detach_node(struct device_node *); |
| 332 | |
| 333 | #define of_match_ptr(_ptr) (_ptr) |
| 334 | |
| 335 | /* |
| 336 | * struct property *prop; |
| 337 | * const __be32 *p; |
| 338 | * u32 u; |
| 339 | * |
| 340 | * of_property_for_each_u32(np, "propname", prop, p, u) |
| 341 | * printk("U32 value: %x\n", u); |
| 342 | */ |
| 343 | const __be32 *of_prop_next_u32(struct property *prop, const __be32 *cur, |
| 344 | u32 *pu); |
| 345 | /* |
| 346 | * struct property *prop; |
| 347 | * const char *s; |
| 348 | * |
| 349 | * of_property_for_each_string(np, "propname", prop, s) |
| 350 | * printk("String value: %s\n", s); |
| 351 | */ |
| 352 | const char *of_prop_next_string(struct property *prop, const char *cur); |
| 353 | |
| 354 | int of_device_is_stdout_path(struct device_node *dn); |
| 355 | |
| 356 | #else /* CONFIG_OF */ |
| 357 | |
| 358 | static inline const char* of_node_full_name(const struct device_node *np) |
| 359 | { |
| 360 | return "<no-node>"; |
| 361 | } |
| 362 | |
| 363 | static inline struct device_node *of_find_node_by_name(struct device_node *from, |
| 364 | const char *name) |
| 365 | { |
| 366 | return NULL; |
| 367 | } |
| 368 | |
| 369 | static inline struct device_node *of_find_node_by_type(struct device_node *from, |
| 370 | const char *type) |
| 371 | { |
| 372 | return NULL; |
| 373 | } |
| 374 | |
| 375 | static inline struct device_node *of_find_matching_node_and_match( |
| 376 | struct device_node *from, |
| 377 | const struct of_device_id *matches, |
| 378 | const struct of_device_id **match) |
| 379 | { |
| 380 | return NULL; |
| 381 | } |
| 382 | |
| 383 | static inline struct device_node *of_find_node_by_path(const char *path) |
| 384 | { |
| 385 | return NULL; |
| 386 | } |
| 387 | |
| 388 | static inline struct device_node *of_get_parent(const struct device_node *node) |
| 389 | { |
| 390 | return NULL; |
| 391 | } |
| 392 | |
| 393 | static inline struct device_node *of_get_next_child( |
| 394 | const struct device_node *node, struct device_node *prev) |
| 395 | { |
| 396 | return NULL; |
| 397 | } |
| 398 | |
| 399 | static inline struct device_node *of_get_next_available_child( |
| 400 | const struct device_node *node, struct device_node *prev) |
| 401 | { |
| 402 | return NULL; |
| 403 | } |
| 404 | |
| 405 | static inline struct device_node *of_find_node_with_property( |
| 406 | struct device_node *from, const char *prop_name) |
| 407 | { |
| 408 | return NULL; |
| 409 | } |
| 410 | |
| 411 | static inline bool of_have_populated_dt(void) |
| 412 | { |
| 413 | return false; |
| 414 | } |
| 415 | |
| 416 | static inline struct device_node *of_get_child_by_name( |
| 417 | const struct device_node *node, |
| 418 | const char *name) |
| 419 | { |
| 420 | return NULL; |
| 421 | } |
| 422 | |
| 423 | static inline int of_device_is_compatible(const struct device_node *device, |
| 424 | const char *name) |
| 425 | { |
| 426 | return 0; |
| 427 | } |
| 428 | |
| 429 | static inline int of_device_is_available(const struct device_node *device) |
| 430 | { |
| 431 | return 0; |
| 432 | } |
| 433 | |
| 434 | static inline struct property *of_find_property(const struct device_node *np, |
| 435 | const char *name, |
| 436 | int *lenp) |
| 437 | { |
| 438 | return NULL; |
| 439 | } |
| 440 | |
| 441 | static inline struct device_node *of_find_compatible_node( |
| 442 | struct device_node *from, |
| 443 | const char *type, |
| 444 | const char *compat) |
| 445 | { |
| 446 | return NULL; |
| 447 | } |
| 448 | |
| 449 | static inline int of_property_count_elems_of_size(const struct device_node *np, |
| 450 | const char *propname, int elem_size) |
| 451 | { |
| 452 | return -ENOSYS; |
| 453 | } |
| 454 | |
| 455 | static inline int of_property_read_u32_index(const struct device_node *np, |
| 456 | const char *propname, u32 index, u32 *out_value) |
| 457 | { |
| 458 | return -ENOSYS; |
| 459 | } |
| 460 | |
| 461 | static inline int of_property_read_u8_array(const struct device_node *np, |
| 462 | const char *propname, u8 *out_values, size_t sz) |
| 463 | { |
| 464 | return -ENOSYS; |
| 465 | } |
| 466 | |
| 467 | static inline int of_property_read_u16_array(const struct device_node *np, |
| 468 | const char *propname, u16 *out_values, size_t sz) |
| 469 | { |
| 470 | return -ENOSYS; |
| 471 | } |
| 472 | |
| 473 | static inline int of_property_read_u32_array(const struct device_node *np, |
| 474 | const char *propname, |
| 475 | u32 *out_values, size_t sz) |
| 476 | { |
| 477 | return -ENOSYS; |
| 478 | } |
| 479 | |
| 480 | static inline int of_property_read_string(struct device_node *np, |
| 481 | const char *propname, |
| 482 | const char **out_string) |
| 483 | { |
| 484 | return -ENOSYS; |
| 485 | } |
| 486 | |
| 487 | static inline int of_property_read_string_index(struct device_node *np, |
| 488 | const char *propname, int index, |
| 489 | const char **out_string) |
| 490 | { |
| 491 | return -ENOSYS; |
| 492 | } |
| 493 | |
| 494 | static inline int of_property_count_strings(struct device_node *np, |
| 495 | const char *propname) |
| 496 | { |
| 497 | return -ENOSYS; |
| 498 | } |
| 499 | |
| 500 | static inline const void *of_get_property(const struct device_node *node, |
| 501 | const char *name, |
| 502 | int *lenp) |
| 503 | { |
| 504 | return NULL; |
| 505 | } |
| 506 | |
| 507 | static inline struct device_node *of_get_cpu_node(int cpu, |
| 508 | unsigned int *thread) |
| 509 | { |
| 510 | return NULL; |
| 511 | } |
| 512 | |
| 513 | static inline int of_property_read_u64(const struct device_node *np, |
| 514 | const char *propname, u64 *out_value) |
| 515 | { |
| 516 | return -ENOSYS; |
| 517 | } |
| 518 | |
| 519 | static inline int of_property_match_string(struct device_node *np, |
| 520 | const char *propname, |
| 521 | const char *string) |
| 522 | { |
| 523 | return -ENOSYS; |
| 524 | } |
| 525 | |
| 526 | static inline struct device_node *of_parse_phandle(const struct device_node *np, |
| 527 | const char *phandle_name, |
| 528 | int index) |
| 529 | { |
| 530 | return NULL; |
| 531 | } |
| 532 | |
| 533 | static inline int of_parse_phandle_with_args(struct device_node *np, |
| 534 | const char *list_name, |
| 535 | const char *cells_name, |
| 536 | int index, |
| 537 | struct of_phandle_args *out_args) |
| 538 | { |
| 539 | return -ENOSYS; |
| 540 | } |
| 541 | |
| 542 | static inline int of_parse_phandle_with_fixed_args(const struct device_node *np, |
| 543 | const char *list_name, int cells_count, int index, |
| 544 | struct of_phandle_args *out_args) |
| 545 | { |
| 546 | return -ENOSYS; |
| 547 | } |
| 548 | |
| 549 | static inline int of_count_phandle_with_args(struct device_node *np, |
| 550 | const char *list_name, |
| 551 | const char *cells_name) |
| 552 | { |
| 553 | return -ENOSYS; |
| 554 | } |
| 555 | |
| 556 | static inline int of_alias_get_id(struct device_node *np, const char *stem) |
| 557 | { |
| 558 | return -ENOSYS; |
| 559 | } |
| 560 | |
| 561 | static inline int of_machine_is_compatible(const char *compat) |
| 562 | { |
| 563 | return 0; |
| 564 | } |
| 565 | |
| 566 | static inline int of_device_is_stdout_path(struct device_node *dn) |
| 567 | { |
| 568 | return 0; |
| 569 | } |
| 570 | |
| 571 | static inline const __be32 *of_prop_next_u32(struct property *prop, |
| 572 | const __be32 *cur, u32 *pu) |
| 573 | { |
| 574 | return NULL; |
| 575 | } |
| 576 | |
| 577 | static inline const char *of_prop_next_string(struct property *prop, |
| 578 | const char *cur) |
| 579 | { |
| 580 | return NULL; |
| 581 | } |
| 582 | |
| 583 | #define of_match_ptr(_ptr) NULL |
| 584 | #define of_match_node(_matches, _node) NULL |
| 585 | #endif /* CONFIG_OF */ |
| 586 | |
| 587 | #if defined(CONFIG_OF) && defined(CONFIG_NUMA) |
| 588 | extern int of_node_to_nid(struct device_node *np); |
| 589 | #else |
| 590 | static inline int of_node_to_nid(struct device_node *device) { return 0; } |
| 591 | #endif |
| 592 | |
| 593 | static inline struct device_node *of_find_matching_node( |
| 594 | struct device_node *from, |
| 595 | const struct of_device_id *matches) |
| 596 | { |
| 597 | return of_find_matching_node_and_match(from, matches, NULL); |
| 598 | } |
| 599 | |
| 600 | /** |
| 601 | * of_property_count_u8_elems - Count the number of u8 elements in a property |
| 602 | * |
| 603 | * @np: device node from which the property value is to be read. |
| 604 | * @propname: name of the property to be searched. |
| 605 | * |
| 606 | * Search for a property in a device node and count the number of u8 elements |
| 607 | * in it. Returns number of elements on sucess, -EINVAL if the property does |
| 608 | * not exist or its length does not match a multiple of u8 and -ENODATA if the |
| 609 | * property does not have a value. |
| 610 | */ |
| 611 | static inline int of_property_count_u8_elems(const struct device_node *np, |
| 612 | const char *propname) |
| 613 | { |
| 614 | return of_property_count_elems_of_size(np, propname, sizeof(u8)); |
| 615 | } |
| 616 | |
| 617 | /** |
| 618 | * of_property_count_u16_elems - Count the number of u16 elements in a property |
| 619 | * |
| 620 | * @np: device node from which the property value is to be read. |
| 621 | * @propname: name of the property to be searched. |
| 622 | * |
| 623 | * Search for a property in a device node and count the number of u16 elements |
| 624 | * in it. Returns number of elements on sucess, -EINVAL if the property does |
| 625 | * not exist or its length does not match a multiple of u16 and -ENODATA if the |
| 626 | * property does not have a value. |
| 627 | */ |
| 628 | static inline int of_property_count_u16_elems(const struct device_node *np, |
| 629 | const char *propname) |
| 630 | { |
| 631 | return of_property_count_elems_of_size(np, propname, sizeof(u16)); |
| 632 | } |
| 633 | |
| 634 | /** |
| 635 | * of_property_count_u32_elems - Count the number of u32 elements in a property |
| 636 | * |
| 637 | * @np: device node from which the property value is to be read. |
| 638 | * @propname: name of the property to be searched. |
| 639 | * |
| 640 | * Search for a property in a device node and count the number of u32 elements |
| 641 | * in it. Returns number of elements on sucess, -EINVAL if the property does |
| 642 | * not exist or its length does not match a multiple of u32 and -ENODATA if the |
| 643 | * property does not have a value. |
| 644 | */ |
| 645 | static inline int of_property_count_u32_elems(const struct device_node *np, |
| 646 | const char *propname) |
| 647 | { |
| 648 | return of_property_count_elems_of_size(np, propname, sizeof(u32)); |
| 649 | } |
| 650 | |
| 651 | /** |
| 652 | * of_property_count_u64_elems - Count the number of u64 elements in a property |
| 653 | * |
| 654 | * @np: device node from which the property value is to be read. |
| 655 | * @propname: name of the property to be searched. |
| 656 | * |
| 657 | * Search for a property in a device node and count the number of u64 elements |
| 658 | * in it. Returns number of elements on sucess, -EINVAL if the property does |
| 659 | * not exist or its length does not match a multiple of u64 and -ENODATA if the |
| 660 | * property does not have a value. |
| 661 | */ |
| 662 | static inline int of_property_count_u64_elems(const struct device_node *np, |
| 663 | const char *propname) |
| 664 | { |
| 665 | return of_property_count_elems_of_size(np, propname, sizeof(u64)); |
| 666 | } |
| 667 | |
| 668 | /** |
| 669 | * of_property_read_bool - Findfrom a property |
| 670 | * @np: device node from which the property value is to be read. |
| 671 | * @propname: name of the property to be searched. |
| 672 | * |
| 673 | * Search for a property in a device node. |
| 674 | * Returns true if the property exist false otherwise. |
| 675 | */ |
| 676 | static inline bool of_property_read_bool(const struct device_node *np, |
| 677 | const char *propname) |
| 678 | { |
| 679 | struct property *prop = of_find_property(np, propname, NULL); |
| 680 | |
| 681 | return prop ? true : false; |
| 682 | } |
| 683 | |
| 684 | static inline int of_property_read_u8(const struct device_node *np, |
| 685 | const char *propname, |
| 686 | u8 *out_value) |
| 687 | { |
| 688 | return of_property_read_u8_array(np, propname, out_value, 1); |
| 689 | } |
| 690 | |
| 691 | static inline int of_property_read_u16(const struct device_node *np, |
| 692 | const char *propname, |
| 693 | u16 *out_value) |
| 694 | { |
| 695 | return of_property_read_u16_array(np, propname, out_value, 1); |
| 696 | } |
| 697 | |
| 698 | static inline int of_property_read_u32(const struct device_node *np, |
| 699 | const char *propname, |
| 700 | u32 *out_value) |
| 701 | { |
| 702 | return of_property_read_u32_array(np, propname, out_value, 1); |
| 703 | } |
| 704 | |
| 705 | #define of_property_for_each_u32(np, propname, prop, p, u) \ |
| 706 | for (prop = of_find_property(np, propname, NULL), \ |
| 707 | p = of_prop_next_u32(prop, NULL, &u); \ |
| 708 | p; \ |
| 709 | p = of_prop_next_u32(prop, p, &u)) |
| 710 | |
| 711 | #define of_property_for_each_string(np, propname, prop, s) \ |
| 712 | for (prop = of_find_property(np, propname, NULL), \ |
| 713 | s = of_prop_next_string(prop, NULL); \ |
| 714 | s; \ |
| 715 | s = of_prop_next_string(prop, s)) |
| 716 | |
| 717 | #define for_each_node_by_name(dn, name) \ |
| 718 | for (dn = of_find_node_by_name(NULL, name); dn; \ |
| 719 | dn = of_find_node_by_name(dn, name)) |
| 720 | #define for_each_node_by_type(dn, type) \ |
| 721 | for (dn = of_find_node_by_type(NULL, type); dn; \ |
| 722 | dn = of_find_node_by_type(dn, type)) |
| 723 | #define for_each_compatible_node(dn, type, compatible) \ |
| 724 | for (dn = of_find_compatible_node(NULL, type, compatible); dn; \ |
| 725 | dn = of_find_compatible_node(dn, type, compatible)) |
| 726 | #define for_each_matching_node(dn, matches) \ |
| 727 | for (dn = of_find_matching_node(NULL, matches); dn; \ |
| 728 | dn = of_find_matching_node(dn, matches)) |
| 729 | #define for_each_matching_node_and_match(dn, matches, match) \ |
| 730 | for (dn = of_find_matching_node_and_match(NULL, matches, match); \ |
| 731 | dn; dn = of_find_matching_node_and_match(dn, matches, match)) |
| 732 | |
| 733 | #define for_each_child_of_node(parent, child) \ |
| 734 | for (child = of_get_next_child(parent, NULL); child != NULL; \ |
| 735 | child = of_get_next_child(parent, child)) |
| 736 | #define for_each_available_child_of_node(parent, child) \ |
| 737 | for (child = of_get_next_available_child(parent, NULL); child != NULL; \ |
| 738 | child = of_get_next_available_child(parent, child)) |
| 739 | |
| 740 | #define for_each_node_with_property(dn, prop_name) \ |
| 741 | for (dn = of_find_node_with_property(NULL, prop_name); dn; \ |
| 742 | dn = of_find_node_with_property(dn, prop_name)) |
| 743 | |
| 744 | static inline int of_get_child_count(const struct device_node *np) |
| 745 | { |
| 746 | struct device_node *child; |
| 747 | int num = 0; |
| 748 | |
| 749 | for_each_child_of_node(np, child) |
| 750 | num++; |
| 751 | |
| 752 | return num; |
| 753 | } |
| 754 | |
| 755 | static inline int of_get_available_child_count(const struct device_node *np) |
| 756 | { |
| 757 | struct device_node *child; |
| 758 | int num = 0; |
| 759 | |
| 760 | for_each_available_child_of_node(np, child) |
| 761 | num++; |
| 762 | |
| 763 | return num; |
| 764 | } |
| 765 | |
| 766 | #ifdef CONFIG_OF |
| 767 | #define _OF_DECLARE(table, name, compat, fn, fn_type) \ |
| 768 | static const struct of_device_id __of_table_##name \ |
| 769 | __used __section(__##table##_of_table) \ |
| 770 | = { .compatible = compat, \ |
| 771 | .data = (fn == (fn_type)NULL) ? fn : fn } |
| 772 | #else |
| 773 | #define _OF_DECLARE(table, name, compat, fn, fn_type) \ |
| 774 | static const struct of_device_id __of_table_##name \ |
| 775 | __attribute__((unused)) \ |
| 776 | = { .compatible = compat, \ |
| 777 | .data = (fn == (fn_type)NULL) ? fn : fn } |
| 778 | #endif |
| 779 | |
| 780 | typedef int (*of_init_fn_2)(struct device_node *, struct device_node *); |
| 781 | typedef void (*of_init_fn_1)(struct device_node *); |
| 782 | |
| 783 | #define OF_DECLARE_1(table, name, compat, fn) \ |
| 784 | _OF_DECLARE(table, name, compat, fn, of_init_fn_1) |
| 785 | #define OF_DECLARE_2(table, name, compat, fn) \ |
| 786 | _OF_DECLARE(table, name, compat, fn, of_init_fn_2) |
| 787 | |
| 788 | #endif /* _LINUX_OF_H */ |