include/linux/of.h

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