| 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 | #include <linux/property.h> |
| 27 | #include <linux/list.h> |
| 28 | |
| 29 | #include <asm/byteorder.h> |
| 30 | #include <asm/errno.h> |
| 31 | |
| 32 | typedef u32 phandle; |
| 33 | typedef u32 ihandle; |
| 34 | |
| 35 | struct property { |
| 36 | char *name; |
| 37 | int length; |
| 38 | void *value; |
| 39 | struct property *next; |
| 40 | unsigned long _flags; |
| 41 | unsigned int unique_id; |
| 42 | struct bin_attribute attr; |
| 43 | }; |
| 44 | |
| 45 | #if defined(CONFIG_SPARC) |
| 46 | struct of_irq_controller; |
| 47 | #endif |
| 48 | |
| 49 | struct device_node { |
| 50 | const char *name; |
| 51 | const char *type; |
| 52 | phandle phandle; |
| 53 | const char *full_name; |
| 54 | struct fwnode_handle fwnode; |
| 55 | |
| 56 | struct property *properties; |
| 57 | struct property *deadprops; /* removed properties */ |
| 58 | struct device_node *parent; |
| 59 | struct device_node *child; |
| 60 | struct device_node *sibling; |
| 61 | struct kobject kobj; |
| 62 | unsigned long _flags; |
| 63 | void *data; |
| 64 | #if defined(CONFIG_SPARC) |
| 65 | const char *path_component_name; |
| 66 | unsigned int unique_id; |
| 67 | struct of_irq_controller *irq_trans; |
| 68 | #endif |
| 69 | }; |
| 70 | |
| 71 | #define MAX_PHANDLE_ARGS 16 |
| 72 | struct of_phandle_args { |
| 73 | struct device_node *np; |
| 74 | int args_count; |
| 75 | uint32_t args[MAX_PHANDLE_ARGS]; |
| 76 | }; |
| 77 | |
| 78 | struct of_phandle_iterator { |
| 79 | /* Common iterator information */ |
| 80 | const char *cells_name; |
| 81 | int cell_count; |
| 82 | const struct device_node *parent; |
| 83 | |
| 84 | /* List size information */ |
| 85 | const __be32 *list_end; |
| 86 | const __be32 *phandle_end; |
| 87 | |
| 88 | /* Current position state */ |
| 89 | const __be32 *cur; |
| 90 | uint32_t cur_count; |
| 91 | phandle phandle; |
| 92 | struct device_node *node; |
| 93 | }; |
| 94 | |
| 95 | struct of_reconfig_data { |
| 96 | struct device_node *dn; |
| 97 | struct property *prop; |
| 98 | struct property *old_prop; |
| 99 | }; |
| 100 | |
| 101 | /* initialize a node */ |
| 102 | extern struct kobj_type of_node_ktype; |
| 103 | extern const struct fwnode_operations of_fwnode_ops; |
| 104 | static inline void of_node_init(struct device_node *node) |
| 105 | { |
| 106 | kobject_init(&node->kobj, &of_node_ktype); |
| 107 | node->fwnode.ops = &of_fwnode_ops; |
| 108 | } |
| 109 | |
| 110 | /* true when node is initialized */ |
| 111 | static inline int of_node_is_initialized(struct device_node *node) |
| 112 | { |
| 113 | return node && node->kobj.state_initialized; |
| 114 | } |
| 115 | |
| 116 | /* true when node is attached (i.e. present on sysfs) */ |
| 117 | static inline int of_node_is_attached(struct device_node *node) |
| 118 | { |
| 119 | return node && node->kobj.state_in_sysfs; |
| 120 | } |
| 121 | |
| 122 | #ifdef CONFIG_OF_DYNAMIC |
| 123 | extern struct device_node *of_node_get(struct device_node *node); |
| 124 | extern void of_node_put(struct device_node *node); |
| 125 | #else /* CONFIG_OF_DYNAMIC */ |
| 126 | /* Dummy ref counting routines - to be implemented later */ |
| 127 | static inline struct device_node *of_node_get(struct device_node *node) |
| 128 | { |
| 129 | return node; |
| 130 | } |
| 131 | static inline void of_node_put(struct device_node *node) { } |
| 132 | #endif /* !CONFIG_OF_DYNAMIC */ |
| 133 | |
| 134 | /* Pointer for first entry in chain of all nodes. */ |
| 135 | extern struct device_node *of_root; |
| 136 | extern struct device_node *of_chosen; |
| 137 | extern struct device_node *of_aliases; |
| 138 | extern struct device_node *of_stdout; |
| 139 | extern raw_spinlock_t devtree_lock; |
| 140 | |
| 141 | /* flag descriptions (need to be visible even when !CONFIG_OF) */ |
| 142 | #define OF_DYNAMIC 1 /* node and properties were allocated via kmalloc */ |
| 143 | #define OF_DETACHED 2 /* node has been detached from the device tree */ |
| 144 | #define OF_POPULATED 3 /* device already created for the node */ |
| 145 | #define OF_POPULATED_BUS 4 /* of_platform_populate recursed to children of this node */ |
| 146 | |
| 147 | #define OF_BAD_ADDR ((u64)-1) |
| 148 | |
| 149 | #ifdef CONFIG_OF |
| 150 | void of_core_init(void); |
| 151 | |
| 152 | static inline bool is_of_node(const struct fwnode_handle *fwnode) |
| 153 | { |
| 154 | return !IS_ERR_OR_NULL(fwnode) && fwnode->ops == &of_fwnode_ops; |
| 155 | } |
| 156 | |
| 157 | #define to_of_node(__fwnode) \ |
| 158 | ({ \ |
| 159 | typeof(__fwnode) __to_of_node_fwnode = (__fwnode); \ |
| 160 | \ |
| 161 | is_of_node(__to_of_node_fwnode) ? \ |
| 162 | container_of(__to_of_node_fwnode, \ |
| 163 | struct device_node, fwnode) : \ |
| 164 | NULL; \ |
| 165 | }) |
| 166 | |
| 167 | #define of_fwnode_handle(node) \ |
| 168 | ({ \ |
| 169 | typeof(node) __of_fwnode_handle_node = (node); \ |
| 170 | \ |
| 171 | __of_fwnode_handle_node ? \ |
| 172 | &__of_fwnode_handle_node->fwnode : NULL; \ |
| 173 | }) |
| 174 | |
| 175 | static inline bool of_have_populated_dt(void) |
| 176 | { |
| 177 | return of_root != NULL; |
| 178 | } |
| 179 | |
| 180 | static inline bool of_node_is_root(const struct device_node *node) |
| 181 | { |
| 182 | return node && (node->parent == NULL); |
| 183 | } |
| 184 | |
| 185 | static inline int of_node_check_flag(struct device_node *n, unsigned long flag) |
| 186 | { |
| 187 | return test_bit(flag, &n->_flags); |
| 188 | } |
| 189 | |
| 190 | static inline int of_node_test_and_set_flag(struct device_node *n, |
| 191 | unsigned long flag) |
| 192 | { |
| 193 | return test_and_set_bit(flag, &n->_flags); |
| 194 | } |
| 195 | |
| 196 | static inline void of_node_set_flag(struct device_node *n, unsigned long flag) |
| 197 | { |
| 198 | set_bit(flag, &n->_flags); |
| 199 | } |
| 200 | |
| 201 | static inline void of_node_clear_flag(struct device_node *n, unsigned long flag) |
| 202 | { |
| 203 | clear_bit(flag, &n->_flags); |
| 204 | } |
| 205 | |
| 206 | static inline int of_property_check_flag(struct property *p, unsigned long flag) |
| 207 | { |
| 208 | return test_bit(flag, &p->_flags); |
| 209 | } |
| 210 | |
| 211 | static inline void of_property_set_flag(struct property *p, unsigned long flag) |
| 212 | { |
| 213 | set_bit(flag, &p->_flags); |
| 214 | } |
| 215 | |
| 216 | static inline void of_property_clear_flag(struct property *p, unsigned long flag) |
| 217 | { |
| 218 | clear_bit(flag, &p->_flags); |
| 219 | } |
| 220 | |
| 221 | extern struct device_node *__of_find_all_nodes(struct device_node *prev); |
| 222 | extern struct device_node *of_find_all_nodes(struct device_node *prev); |
| 223 | |
| 224 | /* |
| 225 | * OF address retrieval & translation |
| 226 | */ |
| 227 | |
| 228 | /* Helper to read a big number; size is in cells (not bytes) */ |
| 229 | static inline u64 of_read_number(const __be32 *cell, int size) |
| 230 | { |
| 231 | u64 r = 0; |
| 232 | while (size--) |
| 233 | r = (r << 32) | be32_to_cpu(*(cell++)); |
| 234 | return r; |
| 235 | } |
| 236 | |
| 237 | /* Like of_read_number, but we want an unsigned long result */ |
| 238 | static inline unsigned long of_read_ulong(const __be32 *cell, int size) |
| 239 | { |
| 240 | /* toss away upper bits if unsigned long is smaller than u64 */ |
| 241 | return of_read_number(cell, size); |
| 242 | } |
| 243 | |
| 244 | #if defined(CONFIG_SPARC) |
| 245 | #include <asm/prom.h> |
| 246 | #endif |
| 247 | |
| 248 | /* Default #address and #size cells. Allow arch asm/prom.h to override */ |
| 249 | #if !defined(OF_ROOT_NODE_ADDR_CELLS_DEFAULT) |
| 250 | #define OF_ROOT_NODE_ADDR_CELLS_DEFAULT 1 |
| 251 | #define OF_ROOT_NODE_SIZE_CELLS_DEFAULT 1 |
| 252 | #endif |
| 253 | |
| 254 | #define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags) |
| 255 | #define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags) |
| 256 | |
| 257 | static inline const char *of_node_full_name(const struct device_node *np) |
| 258 | { |
| 259 | return np ? np->full_name : "<no-node>"; |
| 260 | } |
| 261 | |
| 262 | #define for_each_of_allnodes_from(from, dn) \ |
| 263 | for (dn = __of_find_all_nodes(from); dn; dn = __of_find_all_nodes(dn)) |
| 264 | #define for_each_of_allnodes(dn) for_each_of_allnodes_from(NULL, dn) |
| 265 | extern struct device_node *of_find_node_by_name(struct device_node *from, |
| 266 | const char *name); |
| 267 | extern struct device_node *of_find_node_by_type(struct device_node *from, |
| 268 | const char *type); |
| 269 | extern struct device_node *of_find_compatible_node(struct device_node *from, |
| 270 | const char *type, const char *compat); |
| 271 | extern struct device_node *of_find_matching_node_and_match( |
| 272 | struct device_node *from, |
| 273 | const struct of_device_id *matches, |
| 274 | const struct of_device_id **match); |
| 275 | |
| 276 | extern struct device_node *of_find_node_opts_by_path(const char *path, |
| 277 | const char **opts); |
| 278 | static inline struct device_node *of_find_node_by_path(const char *path) |
| 279 | { |
| 280 | return of_find_node_opts_by_path(path, NULL); |
| 281 | } |
| 282 | |
| 283 | extern struct device_node *of_find_node_by_phandle(phandle handle); |
| 284 | extern struct device_node *of_get_parent(const struct device_node *node); |
| 285 | extern struct device_node *of_get_next_parent(struct device_node *node); |
| 286 | extern struct device_node *of_get_next_child(const struct device_node *node, |
| 287 | struct device_node *prev); |
| 288 | extern struct device_node *of_get_next_available_child( |
| 289 | const struct device_node *node, struct device_node *prev); |
| 290 | |
| 291 | extern struct device_node *of_get_compatible_child(const struct device_node *parent, |
| 292 | const char *compatible); |
| 293 | extern struct device_node *of_get_child_by_name(const struct device_node *node, |
| 294 | const char *name); |
| 295 | |
| 296 | /* cache lookup */ |
| 297 | extern struct device_node *of_find_next_cache_node(const struct device_node *); |
| 298 | extern int of_find_last_cache_level(unsigned int cpu); |
| 299 | extern struct device_node *of_find_node_with_property( |
| 300 | struct device_node *from, const char *prop_name); |
| 301 | |
| 302 | extern struct property *of_find_property(const struct device_node *np, |
| 303 | const char *name, |
| 304 | int *lenp); |
| 305 | extern int of_property_count_elems_of_size(const struct device_node *np, |
| 306 | const char *propname, int elem_size); |
| 307 | extern int of_property_read_u32_index(const struct device_node *np, |
| 308 | const char *propname, |
| 309 | u32 index, u32 *out_value); |
| 310 | extern int of_property_read_u64_index(const struct device_node *np, |
| 311 | const char *propname, |
| 312 | u32 index, u64 *out_value); |
| 313 | extern int of_property_read_variable_u8_array(const struct device_node *np, |
| 314 | const char *propname, u8 *out_values, |
| 315 | size_t sz_min, size_t sz_max); |
| 316 | extern int of_property_read_variable_u16_array(const struct device_node *np, |
| 317 | const char *propname, u16 *out_values, |
| 318 | size_t sz_min, size_t sz_max); |
| 319 | extern int of_property_read_variable_u32_array(const struct device_node *np, |
| 320 | const char *propname, |
| 321 | u32 *out_values, |
| 322 | size_t sz_min, |
| 323 | size_t sz_max); |
| 324 | extern int of_property_read_u64(const struct device_node *np, |
| 325 | const char *propname, u64 *out_value); |
| 326 | extern int of_property_read_variable_u64_array(const struct device_node *np, |
| 327 | const char *propname, |
| 328 | u64 *out_values, |
| 329 | size_t sz_min, |
| 330 | size_t sz_max); |
| 331 | |
| 332 | extern int of_property_read_string(const struct device_node *np, |
| 333 | const char *propname, |
| 334 | const char **out_string); |
| 335 | extern int of_property_match_string(const struct device_node *np, |
| 336 | const char *propname, |
| 337 | const char *string); |
| 338 | extern int of_property_read_string_helper(const struct device_node *np, |
| 339 | const char *propname, |
| 340 | const char **out_strs, size_t sz, int index); |
| 341 | extern int of_device_is_compatible(const struct device_node *device, |
| 342 | const char *); |
| 343 | extern int of_device_compatible_match(struct device_node *device, |
| 344 | const char *const *compat); |
| 345 | extern bool of_device_is_available(const struct device_node *device); |
| 346 | extern bool of_device_is_big_endian(const struct device_node *device); |
| 347 | extern const void *of_get_property(const struct device_node *node, |
| 348 | const char *name, |
| 349 | int *lenp); |
| 350 | extern struct device_node *of_get_cpu_node(int cpu, unsigned int *thread); |
| 351 | #define for_each_property_of_node(dn, pp) \ |
| 352 | for (pp = dn->properties; pp != NULL; pp = pp->next) |
| 353 | |
| 354 | extern int of_n_addr_cells(struct device_node *np); |
| 355 | extern int of_n_size_cells(struct device_node *np); |
| 356 | extern const struct of_device_id *of_match_node( |
| 357 | const struct of_device_id *matches, const struct device_node *node); |
| 358 | extern int of_modalias_node(struct device_node *node, char *modalias, int len); |
| 359 | extern void of_print_phandle_args(const char *msg, const struct of_phandle_args *args); |
| 360 | extern struct device_node *of_parse_phandle(const struct device_node *np, |
| 361 | const char *phandle_name, |
| 362 | int index); |
| 363 | extern int of_parse_phandle_with_args(const struct device_node *np, |
| 364 | const char *list_name, const char *cells_name, int index, |
| 365 | struct of_phandle_args *out_args); |
| 366 | extern int of_parse_phandle_with_fixed_args(const struct device_node *np, |
| 367 | const char *list_name, int cells_count, int index, |
| 368 | struct of_phandle_args *out_args); |
| 369 | extern int of_count_phandle_with_args(const struct device_node *np, |
| 370 | const char *list_name, const char *cells_name); |
| 371 | |
| 372 | /* phandle iterator functions */ |
| 373 | extern int of_phandle_iterator_init(struct of_phandle_iterator *it, |
| 374 | const struct device_node *np, |
| 375 | const char *list_name, |
| 376 | const char *cells_name, |
| 377 | int cell_count); |
| 378 | |
| 379 | extern int of_phandle_iterator_next(struct of_phandle_iterator *it); |
| 380 | extern int of_phandle_iterator_args(struct of_phandle_iterator *it, |
| 381 | uint32_t *args, |
| 382 | int size); |
| 383 | |
| 384 | extern void of_alias_scan(void * (*dt_alloc)(u64 size, u64 align)); |
| 385 | extern int of_alias_get_id(struct device_node *np, const char *stem); |
| 386 | extern int of_alias_get_highest_id(const char *stem); |
| 387 | |
| 388 | extern int of_machine_is_compatible(const char *compat); |
| 389 | |
| 390 | extern int of_add_property(struct device_node *np, struct property *prop); |
| 391 | extern int of_remove_property(struct device_node *np, struct property *prop); |
| 392 | extern int of_update_property(struct device_node *np, struct property *newprop); |
| 393 | |
| 394 | /* For updating the device tree at runtime */ |
| 395 | #define OF_RECONFIG_ATTACH_NODE 0x0001 |
| 396 | #define OF_RECONFIG_DETACH_NODE 0x0002 |
| 397 | #define OF_RECONFIG_ADD_PROPERTY 0x0003 |
| 398 | #define OF_RECONFIG_REMOVE_PROPERTY 0x0004 |
| 399 | #define OF_RECONFIG_UPDATE_PROPERTY 0x0005 |
| 400 | |
| 401 | extern int of_attach_node(struct device_node *); |
| 402 | extern int of_detach_node(struct device_node *); |
| 403 | |
| 404 | #define of_match_ptr(_ptr) (_ptr) |
| 405 | |
| 406 | /** |
| 407 | * of_property_read_u8_array - Find and read an array of u8 from a property. |
| 408 | * |
| 409 | * @np: device node from which the property value is to be read. |
| 410 | * @propname: name of the property to be searched. |
| 411 | * @out_values: pointer to return value, modified only if return value is 0. |
| 412 | * @sz: number of array elements to read |
| 413 | * |
| 414 | * Search for a property in a device node and read 8-bit value(s) from |
| 415 | * it. Returns 0 on success, -EINVAL if the property does not exist, |
| 416 | * -ENODATA if property does not have a value, and -EOVERFLOW if the |
| 417 | * property data isn't large enough. |
| 418 | * |
| 419 | * dts entry of array should be like: |
| 420 | * property = /bits/ 8 <0x50 0x60 0x70>; |
| 421 | * |
| 422 | * The out_values is modified only if a valid u8 value can be decoded. |
| 423 | */ |
| 424 | static inline int of_property_read_u8_array(const struct device_node *np, |
| 425 | const char *propname, |
| 426 | u8 *out_values, size_t sz) |
| 427 | { |
| 428 | int ret = of_property_read_variable_u8_array(np, propname, out_values, |
| 429 | sz, 0); |
| 430 | if (ret >= 0) |
| 431 | return 0; |
| 432 | else |
| 433 | return ret; |
| 434 | } |
| 435 | |
| 436 | /** |
| 437 | * of_property_read_u16_array - Find and read an array of u16 from a property. |
| 438 | * |
| 439 | * @np: device node from which the property value is to be read. |
| 440 | * @propname: name of the property to be searched. |
| 441 | * @out_values: pointer to return value, modified only if return value is 0. |
| 442 | * @sz: number of array elements to read |
| 443 | * |
| 444 | * Search for a property in a device node and read 16-bit value(s) from |
| 445 | * it. Returns 0 on success, -EINVAL if the property does not exist, |
| 446 | * -ENODATA if property does not have a value, and -EOVERFLOW if the |
| 447 | * property data isn't large enough. |
| 448 | * |
| 449 | * dts entry of array should be like: |
| 450 | * property = /bits/ 16 <0x5000 0x6000 0x7000>; |
| 451 | * |
| 452 | * The out_values is modified only if a valid u16 value can be decoded. |
| 453 | */ |
| 454 | static inline int of_property_read_u16_array(const struct device_node *np, |
| 455 | const char *propname, |
| 456 | u16 *out_values, size_t sz) |
| 457 | { |
| 458 | int ret = of_property_read_variable_u16_array(np, propname, out_values, |
| 459 | sz, 0); |
| 460 | if (ret >= 0) |
| 461 | return 0; |
| 462 | else |
| 463 | return ret; |
| 464 | } |
| 465 | |
| 466 | /** |
| 467 | * of_property_read_u32_array - Find and read an array of 32 bit integers |
| 468 | * from a property. |
| 469 | * |
| 470 | * @np: device node from which the property value is to be read. |
| 471 | * @propname: name of the property to be searched. |
| 472 | * @out_values: pointer to return value, modified only if return value is 0. |
| 473 | * @sz: number of array elements to read |
| 474 | * |
| 475 | * Search for a property in a device node and read 32-bit value(s) from |
| 476 | * it. Returns 0 on success, -EINVAL if the property does not exist, |
| 477 | * -ENODATA if property does not have a value, and -EOVERFLOW if the |
| 478 | * property data isn't large enough. |
| 479 | * |
| 480 | * The out_values is modified only if a valid u32 value can be decoded. |
| 481 | */ |
| 482 | static inline int of_property_read_u32_array(const struct device_node *np, |
| 483 | const char *propname, |
| 484 | u32 *out_values, size_t sz) |
| 485 | { |
| 486 | int ret = of_property_read_variable_u32_array(np, propname, out_values, |
| 487 | sz, 0); |
| 488 | if (ret >= 0) |
| 489 | return 0; |
| 490 | else |
| 491 | return ret; |
| 492 | } |
| 493 | |
| 494 | /** |
| 495 | * of_property_read_u64_array - Find and read an array of 64 bit integers |
| 496 | * from a property. |
| 497 | * |
| 498 | * @np: device node from which the property value is to be read. |
| 499 | * @propname: name of the property to be searched. |
| 500 | * @out_values: pointer to return value, modified only if return value is 0. |
| 501 | * @sz: number of array elements to read |
| 502 | * |
| 503 | * Search for a property in a device node and read 64-bit value(s) from |
| 504 | * it. Returns 0 on success, -EINVAL if the property does not exist, |
| 505 | * -ENODATA if property does not have a value, and -EOVERFLOW if the |
| 506 | * property data isn't large enough. |
| 507 | * |
| 508 | * The out_values is modified only if a valid u64 value can be decoded. |
| 509 | */ |
| 510 | static inline int of_property_read_u64_array(const struct device_node *np, |
| 511 | const char *propname, |
| 512 | u64 *out_values, size_t sz) |
| 513 | { |
| 514 | int ret = of_property_read_variable_u64_array(np, propname, out_values, |
| 515 | sz, 0); |
| 516 | if (ret >= 0) |
| 517 | return 0; |
| 518 | else |
| 519 | return ret; |
| 520 | } |
| 521 | |
| 522 | /* |
| 523 | * struct property *prop; |
| 524 | * const __be32 *p; |
| 525 | * u32 u; |
| 526 | * |
| 527 | * of_property_for_each_u32(np, "propname", prop, p, u) |
| 528 | * printk("U32 value: %x\n", u); |
| 529 | */ |
| 530 | const __be32 *of_prop_next_u32(struct property *prop, const __be32 *cur, |
| 531 | u32 *pu); |
| 532 | /* |
| 533 | * struct property *prop; |
| 534 | * const char *s; |
| 535 | * |
| 536 | * of_property_for_each_string(np, "propname", prop, s) |
| 537 | * printk("String value: %s\n", s); |
| 538 | */ |
| 539 | const char *of_prop_next_string(struct property *prop, const char *cur); |
| 540 | |
| 541 | bool of_console_check(struct device_node *dn, char *name, int index); |
| 542 | |
| 543 | #else /* CONFIG_OF */ |
| 544 | |
| 545 | static inline void of_core_init(void) |
| 546 | { |
| 547 | } |
| 548 | |
| 549 | static inline bool is_of_node(const struct fwnode_handle *fwnode) |
| 550 | { |
| 551 | return false; |
| 552 | } |
| 553 | |
| 554 | static inline struct device_node *to_of_node(const struct fwnode_handle *fwnode) |
| 555 | { |
| 556 | return NULL; |
| 557 | } |
| 558 | |
| 559 | static inline const char* of_node_full_name(const struct device_node *np) |
| 560 | { |
| 561 | return "<no-node>"; |
| 562 | } |
| 563 | |
| 564 | static inline struct device_node *of_find_node_by_name(struct device_node *from, |
| 565 | const char *name) |
| 566 | { |
| 567 | return NULL; |
| 568 | } |
| 569 | |
| 570 | static inline struct device_node *of_find_node_by_type(struct device_node *from, |
| 571 | const char *type) |
| 572 | { |
| 573 | return NULL; |
| 574 | } |
| 575 | |
| 576 | static inline struct device_node *of_find_matching_node_and_match( |
| 577 | struct device_node *from, |
| 578 | const struct of_device_id *matches, |
| 579 | const struct of_device_id **match) |
| 580 | { |
| 581 | return NULL; |
| 582 | } |
| 583 | |
| 584 | static inline struct device_node *of_find_node_by_path(const char *path) |
| 585 | { |
| 586 | return NULL; |
| 587 | } |
| 588 | |
| 589 | static inline struct device_node *of_find_node_opts_by_path(const char *path, |
| 590 | const char **opts) |
| 591 | { |
| 592 | return NULL; |
| 593 | } |
| 594 | |
| 595 | static inline struct device_node *of_find_node_by_phandle(phandle handle) |
| 596 | { |
| 597 | return NULL; |
| 598 | } |
| 599 | |
| 600 | static inline struct device_node *of_get_parent(const struct device_node *node) |
| 601 | { |
| 602 | return NULL; |
| 603 | } |
| 604 | |
| 605 | static inline struct device_node *of_get_next_child( |
| 606 | const struct device_node *node, struct device_node *prev) |
| 607 | { |
| 608 | return NULL; |
| 609 | } |
| 610 | |
| 611 | static inline struct device_node *of_get_next_available_child( |
| 612 | const struct device_node *node, struct device_node *prev) |
| 613 | { |
| 614 | return NULL; |
| 615 | } |
| 616 | |
| 617 | static inline struct device_node *of_find_node_with_property( |
| 618 | struct device_node *from, const char *prop_name) |
| 619 | { |
| 620 | return NULL; |
| 621 | } |
| 622 | |
| 623 | #define of_fwnode_handle(node) NULL |
| 624 | |
| 625 | static inline bool of_have_populated_dt(void) |
| 626 | { |
| 627 | return false; |
| 628 | } |
| 629 | |
| 630 | static inline struct device_node *of_get_compatible_child(const struct device_node *parent, |
| 631 | const char *compatible) |
| 632 | { |
| 633 | return NULL; |
| 634 | } |
| 635 | |
| 636 | static inline struct device_node *of_get_child_by_name( |
| 637 | const struct device_node *node, |
| 638 | const char *name) |
| 639 | { |
| 640 | return NULL; |
| 641 | } |
| 642 | |
| 643 | static inline int of_device_is_compatible(const struct device_node *device, |
| 644 | const char *name) |
| 645 | { |
| 646 | return 0; |
| 647 | } |
| 648 | |
| 649 | static inline int of_device_compatible_match(struct device_node *device, |
| 650 | const char *const *compat) |
| 651 | { |
| 652 | return 0; |
| 653 | } |
| 654 | |
| 655 | static inline bool of_device_is_available(const struct device_node *device) |
| 656 | { |
| 657 | return false; |
| 658 | } |
| 659 | |
| 660 | static inline bool of_device_is_big_endian(const struct device_node *device) |
| 661 | { |
| 662 | return false; |
| 663 | } |
| 664 | |
| 665 | static inline struct property *of_find_property(const struct device_node *np, |
| 666 | const char *name, |
| 667 | int *lenp) |
| 668 | { |
| 669 | return NULL; |
| 670 | } |
| 671 | |
| 672 | static inline struct device_node *of_find_compatible_node( |
| 673 | struct device_node *from, |
| 674 | const char *type, |
| 675 | const char *compat) |
| 676 | { |
| 677 | return NULL; |
| 678 | } |
| 679 | |
| 680 | static inline int of_property_count_elems_of_size(const struct device_node *np, |
| 681 | const char *propname, int elem_size) |
| 682 | { |
| 683 | return -ENOSYS; |
| 684 | } |
| 685 | |
| 686 | static inline int of_property_read_u32_index(const struct device_node *np, |
| 687 | const char *propname, u32 index, u32 *out_value) |
| 688 | { |
| 689 | return -ENOSYS; |
| 690 | } |
| 691 | |
| 692 | static inline int of_property_read_u8_array(const struct device_node *np, |
| 693 | const char *propname, u8 *out_values, size_t sz) |
| 694 | { |
| 695 | return -ENOSYS; |
| 696 | } |
| 697 | |
| 698 | static inline int of_property_read_u16_array(const struct device_node *np, |
| 699 | const char *propname, u16 *out_values, size_t sz) |
| 700 | { |
| 701 | return -ENOSYS; |
| 702 | } |
| 703 | |
| 704 | static inline int of_property_read_u32_array(const struct device_node *np, |
| 705 | const char *propname, |
| 706 | u32 *out_values, size_t sz) |
| 707 | { |
| 708 | return -ENOSYS; |
| 709 | } |
| 710 | |
| 711 | static inline int of_property_read_u64_array(const struct device_node *np, |
| 712 | const char *propname, |
| 713 | u64 *out_values, size_t sz) |
| 714 | { |
| 715 | return -ENOSYS; |
| 716 | } |
| 717 | |
| 718 | static inline int of_property_read_string(const struct device_node *np, |
| 719 | const char *propname, |
| 720 | const char **out_string) |
| 721 | { |
| 722 | return -ENOSYS; |
| 723 | } |
| 724 | |
| 725 | static inline int of_property_read_string_helper(const struct device_node *np, |
| 726 | const char *propname, |
| 727 | const char **out_strs, size_t sz, int index) |
| 728 | { |
| 729 | return -ENOSYS; |
| 730 | } |
| 731 | |
| 732 | static inline const void *of_get_property(const struct device_node *node, |
| 733 | const char *name, |
| 734 | int *lenp) |
| 735 | { |
| 736 | return NULL; |
| 737 | } |
| 738 | |
| 739 | static inline struct device_node *of_get_cpu_node(int cpu, |
| 740 | unsigned int *thread) |
| 741 | { |
| 742 | return NULL; |
| 743 | } |
| 744 | |
| 745 | static inline int of_n_addr_cells(struct device_node *np) |
| 746 | { |
| 747 | return 0; |
| 748 | |
| 749 | } |
| 750 | static inline int of_n_size_cells(struct device_node *np) |
| 751 | { |
| 752 | return 0; |
| 753 | } |
| 754 | |
| 755 | static inline int of_property_read_u64(const struct device_node *np, |
| 756 | const char *propname, u64 *out_value) |
| 757 | { |
| 758 | return -ENOSYS; |
| 759 | } |
| 760 | |
| 761 | static inline int of_property_match_string(const struct device_node *np, |
| 762 | const char *propname, |
| 763 | const char *string) |
| 764 | { |
| 765 | return -ENOSYS; |
| 766 | } |
| 767 | |
| 768 | static inline struct device_node *of_parse_phandle(const struct device_node *np, |
| 769 | const char *phandle_name, |
| 770 | int index) |
| 771 | { |
| 772 | return NULL; |
| 773 | } |
| 774 | |
| 775 | static inline int of_parse_phandle_with_args(const struct device_node *np, |
| 776 | const char *list_name, |
| 777 | const char *cells_name, |
| 778 | int index, |
| 779 | struct of_phandle_args *out_args) |
| 780 | { |
| 781 | return -ENOSYS; |
| 782 | } |
| 783 | |
| 784 | static inline int of_parse_phandle_with_fixed_args(const struct device_node *np, |
| 785 | const char *list_name, int cells_count, int index, |
| 786 | struct of_phandle_args *out_args) |
| 787 | { |
| 788 | return -ENOSYS; |
| 789 | } |
| 790 | |
| 791 | static inline int of_count_phandle_with_args(struct device_node *np, |
| 792 | const char *list_name, |
| 793 | const char *cells_name) |
| 794 | { |
| 795 | return -ENOSYS; |
| 796 | } |
| 797 | |
| 798 | static inline int of_phandle_iterator_init(struct of_phandle_iterator *it, |
| 799 | const struct device_node *np, |
| 800 | const char *list_name, |
| 801 | const char *cells_name, |
| 802 | int cell_count) |
| 803 | { |
| 804 | return -ENOSYS; |
| 805 | } |
| 806 | |
| 807 | static inline int of_phandle_iterator_next(struct of_phandle_iterator *it) |
| 808 | { |
| 809 | return -ENOSYS; |
| 810 | } |
| 811 | |
| 812 | static inline int of_phandle_iterator_args(struct of_phandle_iterator *it, |
| 813 | uint32_t *args, |
| 814 | int size) |
| 815 | { |
| 816 | return 0; |
| 817 | } |
| 818 | |
| 819 | static inline int of_alias_get_id(struct device_node *np, const char *stem) |
| 820 | { |
| 821 | return -ENOSYS; |
| 822 | } |
| 823 | |
| 824 | static inline int of_alias_get_highest_id(const char *stem) |
| 825 | { |
| 826 | return -ENOSYS; |
| 827 | } |
| 828 | |
| 829 | static inline int of_machine_is_compatible(const char *compat) |
| 830 | { |
| 831 | return 0; |
| 832 | } |
| 833 | |
| 834 | static inline bool of_console_check(const struct device_node *dn, const char *name, int index) |
| 835 | { |
| 836 | return false; |
| 837 | } |
| 838 | |
| 839 | static inline const __be32 *of_prop_next_u32(struct property *prop, |
| 840 | const __be32 *cur, u32 *pu) |
| 841 | { |
| 842 | return NULL; |
| 843 | } |
| 844 | |
| 845 | static inline const char *of_prop_next_string(struct property *prop, |
| 846 | const char *cur) |
| 847 | { |
| 848 | return NULL; |
| 849 | } |
| 850 | |
| 851 | static inline int of_node_check_flag(struct device_node *n, unsigned long flag) |
| 852 | { |
| 853 | return 0; |
| 854 | } |
| 855 | |
| 856 | static inline int of_node_test_and_set_flag(struct device_node *n, |
| 857 | unsigned long flag) |
| 858 | { |
| 859 | return 0; |
| 860 | } |
| 861 | |
| 862 | static inline void of_node_set_flag(struct device_node *n, unsigned long flag) |
| 863 | { |
| 864 | } |
| 865 | |
| 866 | static inline void of_node_clear_flag(struct device_node *n, unsigned long flag) |
| 867 | { |
| 868 | } |
| 869 | |
| 870 | static inline int of_property_check_flag(struct property *p, unsigned long flag) |
| 871 | { |
| 872 | return 0; |
| 873 | } |
| 874 | |
| 875 | static inline void of_property_set_flag(struct property *p, unsigned long flag) |
| 876 | { |
| 877 | } |
| 878 | |
| 879 | static inline void of_property_clear_flag(struct property *p, unsigned long flag) |
| 880 | { |
| 881 | } |
| 882 | |
| 883 | #define of_match_ptr(_ptr) NULL |
| 884 | #define of_match_node(_matches, _node) NULL |
| 885 | #endif /* CONFIG_OF */ |
| 886 | |
| 887 | /* Default string compare functions, Allow arch asm/prom.h to override */ |
| 888 | #if !defined(of_compat_cmp) |
| 889 | #define of_compat_cmp(s1, s2, l) strcasecmp((s1), (s2)) |
| 890 | #define of_prop_cmp(s1, s2) strcmp((s1), (s2)) |
| 891 | #define of_node_cmp(s1, s2) strcasecmp((s1), (s2)) |
| 892 | #endif |
| 893 | |
| 894 | #if defined(CONFIG_OF) && defined(CONFIG_NUMA) |
| 895 | extern int of_node_to_nid(struct device_node *np); |
| 896 | #else |
| 897 | static inline int of_node_to_nid(struct device_node *device) |
| 898 | { |
| 899 | return NUMA_NO_NODE; |
| 900 | } |
| 901 | #endif |
| 902 | |
| 903 | #ifdef CONFIG_OF_NUMA |
| 904 | extern int of_numa_init(void); |
| 905 | #else |
| 906 | static inline int of_numa_init(void) |
| 907 | { |
| 908 | return -ENOSYS; |
| 909 | } |
| 910 | #endif |
| 911 | |
| 912 | static inline struct device_node *of_find_matching_node( |
| 913 | struct device_node *from, |
| 914 | const struct of_device_id *matches) |
| 915 | { |
| 916 | return of_find_matching_node_and_match(from, matches, NULL); |
| 917 | } |
| 918 | |
| 919 | /** |
| 920 | * of_property_count_u8_elems - Count the number of u8 elements in a property |
| 921 | * |
| 922 | * @np: device node from which the property value is to be read. |
| 923 | * @propname: name of the property to be searched. |
| 924 | * |
| 925 | * Search for a property in a device node and count the number of u8 elements |
| 926 | * in it. Returns number of elements on sucess, -EINVAL if the property does |
| 927 | * not exist or its length does not match a multiple of u8 and -ENODATA if the |
| 928 | * property does not have a value. |
| 929 | */ |
| 930 | static inline int of_property_count_u8_elems(const struct device_node *np, |
| 931 | const char *propname) |
| 932 | { |
| 933 | return of_property_count_elems_of_size(np, propname, sizeof(u8)); |
| 934 | } |
| 935 | |
| 936 | /** |
| 937 | * of_property_count_u16_elems - Count the number of u16 elements in a property |
| 938 | * |
| 939 | * @np: device node from which the property value is to be read. |
| 940 | * @propname: name of the property to be searched. |
| 941 | * |
| 942 | * Search for a property in a device node and count the number of u16 elements |
| 943 | * in it. Returns number of elements on sucess, -EINVAL if the property does |
| 944 | * not exist or its length does not match a multiple of u16 and -ENODATA if the |
| 945 | * property does not have a value. |
| 946 | */ |
| 947 | static inline int of_property_count_u16_elems(const struct device_node *np, |
| 948 | const char *propname) |
| 949 | { |
| 950 | return of_property_count_elems_of_size(np, propname, sizeof(u16)); |
| 951 | } |
| 952 | |
| 953 | /** |
| 954 | * of_property_count_u32_elems - Count the number of u32 elements in a property |
| 955 | * |
| 956 | * @np: device node from which the property value is to be read. |
| 957 | * @propname: name of the property to be searched. |
| 958 | * |
| 959 | * Search for a property in a device node and count the number of u32 elements |
| 960 | * in it. Returns number of elements on sucess, -EINVAL if the property does |
| 961 | * not exist or its length does not match a multiple of u32 and -ENODATA if the |
| 962 | * property does not have a value. |
| 963 | */ |
| 964 | static inline int of_property_count_u32_elems(const struct device_node *np, |
| 965 | const char *propname) |
| 966 | { |
| 967 | return of_property_count_elems_of_size(np, propname, sizeof(u32)); |
| 968 | } |
| 969 | |
| 970 | /** |
| 971 | * of_property_count_u64_elems - Count the number of u64 elements in a property |
| 972 | * |
| 973 | * @np: device node from which the property value is to be read. |
| 974 | * @propname: name of the property to be searched. |
| 975 | * |
| 976 | * Search for a property in a device node and count the number of u64 elements |
| 977 | * in it. Returns number of elements on sucess, -EINVAL if the property does |
| 978 | * not exist or its length does not match a multiple of u64 and -ENODATA if the |
| 979 | * property does not have a value. |
| 980 | */ |
| 981 | static inline int of_property_count_u64_elems(const struct device_node *np, |
| 982 | const char *propname) |
| 983 | { |
| 984 | return of_property_count_elems_of_size(np, propname, sizeof(u64)); |
| 985 | } |
| 986 | |
| 987 | /** |
| 988 | * of_property_read_string_array() - Read an array of strings from a multiple |
| 989 | * strings property. |
| 990 | * @np: device node from which the property value is to be read. |
| 991 | * @propname: name of the property to be searched. |
| 992 | * @out_strs: output array of string pointers. |
| 993 | * @sz: number of array elements to read. |
| 994 | * |
| 995 | * Search for a property in a device tree node and retrieve a list of |
| 996 | * terminated string values (pointer to data, not a copy) in that property. |
| 997 | * |
| 998 | * If @out_strs is NULL, the number of strings in the property is returned. |
| 999 | */ |
| 1000 | static inline int of_property_read_string_array(const struct device_node *np, |
| 1001 | const char *propname, const char **out_strs, |
| 1002 | size_t sz) |
| 1003 | { |
| 1004 | return of_property_read_string_helper(np, propname, out_strs, sz, 0); |
| 1005 | } |
| 1006 | |
| 1007 | /** |
| 1008 | * of_property_count_strings() - Find and return the number of strings from a |
| 1009 | * multiple strings property. |
| 1010 | * @np: device node from which the property value is to be read. |
| 1011 | * @propname: name of the property to be searched. |
| 1012 | * |
| 1013 | * Search for a property in a device tree node and retrieve the number of null |
| 1014 | * terminated string contain in it. Returns the number of strings on |
| 1015 | * success, -EINVAL if the property does not exist, -ENODATA if property |
| 1016 | * does not have a value, and -EILSEQ if the string is not null-terminated |
| 1017 | * within the length of the property data. |
| 1018 | */ |
| 1019 | static inline int of_property_count_strings(const struct device_node *np, |
| 1020 | const char *propname) |
| 1021 | { |
| 1022 | return of_property_read_string_helper(np, propname, NULL, 0, 0); |
| 1023 | } |
| 1024 | |
| 1025 | /** |
| 1026 | * of_property_read_string_index() - Find and read a string from a multiple |
| 1027 | * strings property. |
| 1028 | * @np: device node from which the property value is to be read. |
| 1029 | * @propname: name of the property to be searched. |
| 1030 | * @index: index of the string in the list of strings |
| 1031 | * @out_string: pointer to null terminated return string, modified only if |
| 1032 | * return value is 0. |
| 1033 | * |
| 1034 | * Search for a property in a device tree node and retrieve a null |
| 1035 | * terminated string value (pointer to data, not a copy) in the list of strings |
| 1036 | * contained in that property. |
| 1037 | * Returns 0 on success, -EINVAL if the property does not exist, -ENODATA if |
| 1038 | * property does not have a value, and -EILSEQ if the string is not |
| 1039 | * null-terminated within the length of the property data. |
| 1040 | * |
| 1041 | * The out_string pointer is modified only if a valid string can be decoded. |
| 1042 | */ |
| 1043 | static inline int of_property_read_string_index(const struct device_node *np, |
| 1044 | const char *propname, |
| 1045 | int index, const char **output) |
| 1046 | { |
| 1047 | int rc = of_property_read_string_helper(np, propname, output, 1, index); |
| 1048 | return rc < 0 ? rc : 0; |
| 1049 | } |
| 1050 | |
| 1051 | /** |
| 1052 | * of_property_read_bool - Findfrom a property |
| 1053 | * @np: device node from which the property value is to be read. |
| 1054 | * @propname: name of the property to be searched. |
| 1055 | * |
| 1056 | * Search for a property in a device node. |
| 1057 | * Returns true if the property exists false otherwise. |
| 1058 | */ |
| 1059 | static inline bool of_property_read_bool(const struct device_node *np, |
| 1060 | const char *propname) |
| 1061 | { |
| 1062 | struct property *prop = of_find_property(np, propname, NULL); |
| 1063 | |
| 1064 | return prop ? true : false; |
| 1065 | } |
| 1066 | |
| 1067 | static inline int of_property_read_u8(const struct device_node *np, |
| 1068 | const char *propname, |
| 1069 | u8 *out_value) |
| 1070 | { |
| 1071 | return of_property_read_u8_array(np, propname, out_value, 1); |
| 1072 | } |
| 1073 | |
| 1074 | static inline int of_property_read_u16(const struct device_node *np, |
| 1075 | const char *propname, |
| 1076 | u16 *out_value) |
| 1077 | { |
| 1078 | return of_property_read_u16_array(np, propname, out_value, 1); |
| 1079 | } |
| 1080 | |
| 1081 | static inline int of_property_read_u32(const struct device_node *np, |
| 1082 | const char *propname, |
| 1083 | u32 *out_value) |
| 1084 | { |
| 1085 | return of_property_read_u32_array(np, propname, out_value, 1); |
| 1086 | } |
| 1087 | |
| 1088 | static inline int of_property_read_s32(const struct device_node *np, |
| 1089 | const char *propname, |
| 1090 | s32 *out_value) |
| 1091 | { |
| 1092 | return of_property_read_u32(np, propname, (u32*) out_value); |
| 1093 | } |
| 1094 | |
| 1095 | #define of_for_each_phandle(it, err, np, ln, cn, cc) \ |
| 1096 | for (of_phandle_iterator_init((it), (np), (ln), (cn), (cc)), \ |
| 1097 | err = of_phandle_iterator_next(it); \ |
| 1098 | err == 0; \ |
| 1099 | err = of_phandle_iterator_next(it)) |
| 1100 | |
| 1101 | #define of_property_for_each_u32(np, propname, prop, p, u) \ |
| 1102 | for (prop = of_find_property(np, propname, NULL), \ |
| 1103 | p = of_prop_next_u32(prop, NULL, &u); \ |
| 1104 | p; \ |
| 1105 | p = of_prop_next_u32(prop, p, &u)) |
| 1106 | |
| 1107 | #define of_property_for_each_string(np, propname, prop, s) \ |
| 1108 | for (prop = of_find_property(np, propname, NULL), \ |
| 1109 | s = of_prop_next_string(prop, NULL); \ |
| 1110 | s; \ |
| 1111 | s = of_prop_next_string(prop, s)) |
| 1112 | |
| 1113 | #define for_each_node_by_name(dn, name) \ |
| 1114 | for (dn = of_find_node_by_name(NULL, name); dn; \ |
| 1115 | dn = of_find_node_by_name(dn, name)) |
| 1116 | #define for_each_node_by_type(dn, type) \ |
| 1117 | for (dn = of_find_node_by_type(NULL, type); dn; \ |
| 1118 | dn = of_find_node_by_type(dn, type)) |
| 1119 | #define for_each_compatible_node(dn, type, compatible) \ |
| 1120 | for (dn = of_find_compatible_node(NULL, type, compatible); dn; \ |
| 1121 | dn = of_find_compatible_node(dn, type, compatible)) |
| 1122 | #define for_each_matching_node(dn, matches) \ |
| 1123 | for (dn = of_find_matching_node(NULL, matches); dn; \ |
| 1124 | dn = of_find_matching_node(dn, matches)) |
| 1125 | #define for_each_matching_node_and_match(dn, matches, match) \ |
| 1126 | for (dn = of_find_matching_node_and_match(NULL, matches, match); \ |
| 1127 | dn; dn = of_find_matching_node_and_match(dn, matches, match)) |
| 1128 | |
| 1129 | #define for_each_child_of_node(parent, child) \ |
| 1130 | for (child = of_get_next_child(parent, NULL); child != NULL; \ |
| 1131 | child = of_get_next_child(parent, child)) |
| 1132 | #define for_each_available_child_of_node(parent, child) \ |
| 1133 | for (child = of_get_next_available_child(parent, NULL); child != NULL; \ |
| 1134 | child = of_get_next_available_child(parent, child)) |
| 1135 | |
| 1136 | #define for_each_node_with_property(dn, prop_name) \ |
| 1137 | for (dn = of_find_node_with_property(NULL, prop_name); dn; \ |
| 1138 | dn = of_find_node_with_property(dn, prop_name)) |
| 1139 | |
| 1140 | static inline int of_get_child_count(const struct device_node *np) |
| 1141 | { |
| 1142 | struct device_node *child; |
| 1143 | int num = 0; |
| 1144 | |
| 1145 | for_each_child_of_node(np, child) |
| 1146 | num++; |
| 1147 | |
| 1148 | return num; |
| 1149 | } |
| 1150 | |
| 1151 | static inline int of_get_available_child_count(const struct device_node *np) |
| 1152 | { |
| 1153 | struct device_node *child; |
| 1154 | int num = 0; |
| 1155 | |
| 1156 | for_each_available_child_of_node(np, child) |
| 1157 | num++; |
| 1158 | |
| 1159 | return num; |
| 1160 | } |
| 1161 | |
| 1162 | #if defined(CONFIG_OF) && !defined(MODULE) |
| 1163 | #define _OF_DECLARE(table, name, compat, fn, fn_type) \ |
| 1164 | static const struct of_device_id __of_table_##name \ |
| 1165 | __used __section(__##table##_of_table) \ |
| 1166 | = { .compatible = compat, \ |
| 1167 | .data = (fn == (fn_type)NULL) ? fn : fn } |
| 1168 | #else |
| 1169 | #define _OF_DECLARE(table, name, compat, fn, fn_type) \ |
| 1170 | static const struct of_device_id __of_table_##name \ |
| 1171 | __attribute__((unused)) \ |
| 1172 | = { .compatible = compat, \ |
| 1173 | .data = (fn == (fn_type)NULL) ? fn : fn } |
| 1174 | #endif |
| 1175 | |
| 1176 | typedef int (*of_init_fn_2)(struct device_node *, struct device_node *); |
| 1177 | typedef int (*of_init_fn_1_ret)(struct device_node *); |
| 1178 | typedef void (*of_init_fn_1)(struct device_node *); |
| 1179 | |
| 1180 | #define OF_DECLARE_1(table, name, compat, fn) \ |
| 1181 | _OF_DECLARE(table, name, compat, fn, of_init_fn_1) |
| 1182 | #define OF_DECLARE_1_RET(table, name, compat, fn) \ |
| 1183 | _OF_DECLARE(table, name, compat, fn, of_init_fn_1_ret) |
| 1184 | #define OF_DECLARE_2(table, name, compat, fn) \ |
| 1185 | _OF_DECLARE(table, name, compat, fn, of_init_fn_2) |
| 1186 | |
| 1187 | /** |
| 1188 | * struct of_changeset_entry - Holds a changeset entry |
| 1189 | * |
| 1190 | * @node: list_head for the log list |
| 1191 | * @action: notifier action |
| 1192 | * @np: pointer to the device node affected |
| 1193 | * @prop: pointer to the property affected |
| 1194 | * @old_prop: hold a pointer to the original property |
| 1195 | * |
| 1196 | * Every modification of the device tree during a changeset |
| 1197 | * is held in a list of of_changeset_entry structures. |
| 1198 | * That way we can recover from a partial application, or we can |
| 1199 | * revert the changeset |
| 1200 | */ |
| 1201 | struct of_changeset_entry { |
| 1202 | struct list_head node; |
| 1203 | unsigned long action; |
| 1204 | struct device_node *np; |
| 1205 | struct property *prop; |
| 1206 | struct property *old_prop; |
| 1207 | }; |
| 1208 | |
| 1209 | /** |
| 1210 | * struct of_changeset - changeset tracker structure |
| 1211 | * |
| 1212 | * @entries: list_head for the changeset entries |
| 1213 | * |
| 1214 | * changesets are a convenient way to apply bulk changes to the |
| 1215 | * live tree. In case of an error, changes are rolled-back. |
| 1216 | * changesets live on after initial application, and if not |
| 1217 | * destroyed after use, they can be reverted in one single call. |
| 1218 | */ |
| 1219 | struct of_changeset { |
| 1220 | struct list_head entries; |
| 1221 | }; |
| 1222 | |
| 1223 | enum of_reconfig_change { |
| 1224 | OF_RECONFIG_NO_CHANGE = 0, |
| 1225 | OF_RECONFIG_CHANGE_ADD, |
| 1226 | OF_RECONFIG_CHANGE_REMOVE, |
| 1227 | }; |
| 1228 | |
| 1229 | #ifdef CONFIG_OF_DYNAMIC |
| 1230 | extern int of_reconfig_notifier_register(struct notifier_block *); |
| 1231 | extern int of_reconfig_notifier_unregister(struct notifier_block *); |
| 1232 | extern int of_reconfig_notify(unsigned long, struct of_reconfig_data *rd); |
| 1233 | extern int of_reconfig_get_state_change(unsigned long action, |
| 1234 | struct of_reconfig_data *arg); |
| 1235 | |
| 1236 | extern void of_changeset_init(struct of_changeset *ocs); |
| 1237 | extern void of_changeset_destroy(struct of_changeset *ocs); |
| 1238 | extern int of_changeset_apply(struct of_changeset *ocs); |
| 1239 | extern int of_changeset_revert(struct of_changeset *ocs); |
| 1240 | extern int of_changeset_action(struct of_changeset *ocs, |
| 1241 | unsigned long action, struct device_node *np, |
| 1242 | struct property *prop); |
| 1243 | |
| 1244 | static inline int of_changeset_attach_node(struct of_changeset *ocs, |
| 1245 | struct device_node *np) |
| 1246 | { |
| 1247 | return of_changeset_action(ocs, OF_RECONFIG_ATTACH_NODE, np, NULL); |
| 1248 | } |
| 1249 | |
| 1250 | static inline int of_changeset_detach_node(struct of_changeset *ocs, |
| 1251 | struct device_node *np) |
| 1252 | { |
| 1253 | return of_changeset_action(ocs, OF_RECONFIG_DETACH_NODE, np, NULL); |
| 1254 | } |
| 1255 | |
| 1256 | static inline int of_changeset_add_property(struct of_changeset *ocs, |
| 1257 | struct device_node *np, struct property *prop) |
| 1258 | { |
| 1259 | return of_changeset_action(ocs, OF_RECONFIG_ADD_PROPERTY, np, prop); |
| 1260 | } |
| 1261 | |
| 1262 | static inline int of_changeset_remove_property(struct of_changeset *ocs, |
| 1263 | struct device_node *np, struct property *prop) |
| 1264 | { |
| 1265 | return of_changeset_action(ocs, OF_RECONFIG_REMOVE_PROPERTY, np, prop); |
| 1266 | } |
| 1267 | |
| 1268 | static inline int of_changeset_update_property(struct of_changeset *ocs, |
| 1269 | struct device_node *np, struct property *prop) |
| 1270 | { |
| 1271 | return of_changeset_action(ocs, OF_RECONFIG_UPDATE_PROPERTY, np, prop); |
| 1272 | } |
| 1273 | #else /* CONFIG_OF_DYNAMIC */ |
| 1274 | static inline int of_reconfig_notifier_register(struct notifier_block *nb) |
| 1275 | { |
| 1276 | return -EINVAL; |
| 1277 | } |
| 1278 | static inline int of_reconfig_notifier_unregister(struct notifier_block *nb) |
| 1279 | { |
| 1280 | return -EINVAL; |
| 1281 | } |
| 1282 | static inline int of_reconfig_notify(unsigned long action, |
| 1283 | struct of_reconfig_data *arg) |
| 1284 | { |
| 1285 | return -EINVAL; |
| 1286 | } |
| 1287 | static inline int of_reconfig_get_state_change(unsigned long action, |
| 1288 | struct of_reconfig_data *arg) |
| 1289 | { |
| 1290 | return -EINVAL; |
| 1291 | } |
| 1292 | #endif /* CONFIG_OF_DYNAMIC */ |
| 1293 | |
| 1294 | /* CONFIG_OF_RESOLVE api */ |
| 1295 | extern int of_resolve_phandles(struct device_node *tree); |
| 1296 | |
| 1297 | /** |
| 1298 | * of_device_is_system_power_controller - Tells if system-power-controller is found for device_node |
| 1299 | * @np: Pointer to the given device_node |
| 1300 | * |
| 1301 | * return true if present false otherwise |
| 1302 | */ |
| 1303 | static inline bool of_device_is_system_power_controller(const struct device_node *np) |
| 1304 | { |
| 1305 | return of_property_read_bool(np, "system-power-controller"); |
| 1306 | } |
| 1307 | |
| 1308 | /** |
| 1309 | * Overlay support |
| 1310 | */ |
| 1311 | |
| 1312 | enum of_overlay_notify_action { |
| 1313 | OF_OVERLAY_PRE_APPLY, |
| 1314 | OF_OVERLAY_POST_APPLY, |
| 1315 | OF_OVERLAY_PRE_REMOVE, |
| 1316 | OF_OVERLAY_POST_REMOVE, |
| 1317 | }; |
| 1318 | |
| 1319 | struct of_overlay_notify_data { |
| 1320 | struct device_node *overlay; |
| 1321 | struct device_node *target; |
| 1322 | }; |
| 1323 | |
| 1324 | #ifdef CONFIG_OF_OVERLAY |
| 1325 | |
| 1326 | /* ID based overlays; the API for external users */ |
| 1327 | int of_overlay_create(struct device_node *tree); |
| 1328 | int of_overlay_destroy(int id); |
| 1329 | int of_overlay_destroy_all(void); |
| 1330 | |
| 1331 | int of_overlay_notifier_register(struct notifier_block *nb); |
| 1332 | int of_overlay_notifier_unregister(struct notifier_block *nb); |
| 1333 | |
| 1334 | #else |
| 1335 | |
| 1336 | static inline int of_overlay_create(struct device_node *tree) |
| 1337 | { |
| 1338 | return -ENOTSUPP; |
| 1339 | } |
| 1340 | |
| 1341 | static inline int of_overlay_destroy(int id) |
| 1342 | { |
| 1343 | return -ENOTSUPP; |
| 1344 | } |
| 1345 | |
| 1346 | static inline int of_overlay_destroy_all(void) |
| 1347 | { |
| 1348 | return -ENOTSUPP; |
| 1349 | } |
| 1350 | |
| 1351 | static inline int of_overlay_notifier_register(struct notifier_block *nb) |
| 1352 | { |
| 1353 | return 0; |
| 1354 | } |
| 1355 | |
| 1356 | static inline int of_overlay_notifier_unregister(struct notifier_block *nb) |
| 1357 | { |
| 1358 | return 0; |
| 1359 | } |
| 1360 | |
| 1361 | #endif |
| 1362 | |
| 1363 | #endif /* _LINUX_OF_H */ |