| 1 | /* SPDX-License-Identifier: GPL-2.0+ */ |
| 2 | #ifndef _LINUX_OF_H |
| 3 | #define _LINUX_OF_H |
| 4 | /* |
| 5 | * Definitions for talking to the Open Firmware PROM on |
| 6 | * Power Macintosh and other computers. |
| 7 | * |
| 8 | * Copyright (C) 1996-2005 Paul Mackerras. |
| 9 | * |
| 10 | * Updates for PPC64 by Peter Bergner & David Engebretsen, IBM Corp. |
| 11 | * Updates for SPARC64 by David S. Miller |
| 12 | * Derived from PowerPC and Sparc prom.h files by Stephen Rothwell, IBM Corp. |
| 13 | */ |
| 14 | #include <linux/types.h> |
| 15 | #include <linux/bitops.h> |
| 16 | #include <linux/cleanup.h> |
| 17 | #include <linux/errno.h> |
| 18 | #include <linux/kobject.h> |
| 19 | #include <linux/mod_devicetable.h> |
| 20 | #include <linux/property.h> |
| 21 | #include <linux/list.h> |
| 22 | |
| 23 | #include <asm/byteorder.h> |
| 24 | |
| 25 | typedef u32 phandle; |
| 26 | typedef u32 ihandle; |
| 27 | |
| 28 | struct property { |
| 29 | char *name; |
| 30 | int length; |
| 31 | void *value; |
| 32 | struct property *next; |
| 33 | #if defined(CONFIG_OF_DYNAMIC) || defined(CONFIG_SPARC) |
| 34 | unsigned long _flags; |
| 35 | #endif |
| 36 | #if defined(CONFIG_OF_PROMTREE) |
| 37 | unsigned int unique_id; |
| 38 | #endif |
| 39 | #if defined(CONFIG_OF_KOBJ) |
| 40 | struct bin_attribute attr; |
| 41 | #endif |
| 42 | }; |
| 43 | |
| 44 | #if defined(CONFIG_SPARC) |
| 45 | struct of_irq_controller; |
| 46 | #endif |
| 47 | |
| 48 | struct device_node { |
| 49 | const char *name; |
| 50 | phandle phandle; |
| 51 | const char *full_name; |
| 52 | struct fwnode_handle fwnode; |
| 53 | |
| 54 | struct property *properties; |
| 55 | struct property *deadprops; /* removed properties */ |
| 56 | struct device_node *parent; |
| 57 | struct device_node *child; |
| 58 | struct device_node *sibling; |
| 59 | #if defined(CONFIG_OF_KOBJ) |
| 60 | struct kobject kobj; |
| 61 | #endif |
| 62 | unsigned long _flags; |
| 63 | void *data; |
| 64 | #if defined(CONFIG_SPARC) |
| 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 | struct of_phandle_iterator { |
| 78 | /* Common iterator information */ |
| 79 | const char *cells_name; |
| 80 | int cell_count; |
| 81 | const struct device_node *parent; |
| 82 | |
| 83 | /* List size information */ |
| 84 | const __be32 *list_end; |
| 85 | const __be32 *phandle_end; |
| 86 | |
| 87 | /* Current position state */ |
| 88 | const __be32 *cur; |
| 89 | uint32_t cur_count; |
| 90 | phandle phandle; |
| 91 | struct device_node *node; |
| 92 | }; |
| 93 | |
| 94 | struct of_reconfig_data { |
| 95 | struct device_node *dn; |
| 96 | struct property *prop; |
| 97 | struct property *old_prop; |
| 98 | }; |
| 99 | |
| 100 | extern const struct kobj_type of_node_ktype; |
| 101 | extern const struct fwnode_operations of_fwnode_ops; |
| 102 | |
| 103 | /** |
| 104 | * of_node_init - initialize a devicetree node |
| 105 | * @node: Pointer to device node that has been created by kzalloc() |
| 106 | * |
| 107 | * On return the device_node refcount is set to one. Use of_node_put() |
| 108 | * on @node when done to free the memory allocated for it. If the node |
| 109 | * is NOT a dynamic node the memory will not be freed. The decision of |
| 110 | * whether to free the memory will be done by node->release(), which is |
| 111 | * of_node_release(). |
| 112 | */ |
| 113 | static inline void of_node_init(struct device_node *node) |
| 114 | { |
| 115 | #if defined(CONFIG_OF_KOBJ) |
| 116 | kobject_init(&node->kobj, &of_node_ktype); |
| 117 | #endif |
| 118 | fwnode_init(&node->fwnode, &of_fwnode_ops); |
| 119 | } |
| 120 | |
| 121 | #if defined(CONFIG_OF_KOBJ) |
| 122 | #define of_node_kobj(n) (&(n)->kobj) |
| 123 | #else |
| 124 | #define of_node_kobj(n) NULL |
| 125 | #endif |
| 126 | |
| 127 | #ifdef CONFIG_OF_DYNAMIC |
| 128 | extern struct device_node *of_node_get(struct device_node *node); |
| 129 | extern void of_node_put(struct device_node *node); |
| 130 | #else /* CONFIG_OF_DYNAMIC */ |
| 131 | /* Dummy ref counting routines - to be implemented later */ |
| 132 | static inline struct device_node *of_node_get(struct device_node *node) |
| 133 | { |
| 134 | return node; |
| 135 | } |
| 136 | static inline void of_node_put(struct device_node *node) { } |
| 137 | #endif /* !CONFIG_OF_DYNAMIC */ |
| 138 | DEFINE_FREE(device_node, struct device_node *, if (_T) of_node_put(_T)) |
| 139 | |
| 140 | /* Pointer for first entry in chain of all nodes. */ |
| 141 | extern struct device_node *of_root; |
| 142 | extern struct device_node *of_chosen; |
| 143 | extern struct device_node *of_aliases; |
| 144 | extern struct device_node *of_stdout; |
| 145 | |
| 146 | /* |
| 147 | * struct device_node flag descriptions |
| 148 | * (need to be visible even when !CONFIG_OF) |
| 149 | */ |
| 150 | #define OF_DYNAMIC 1 /* (and properties) allocated via kmalloc */ |
| 151 | #define OF_DETACHED 2 /* detached from the device tree */ |
| 152 | #define OF_POPULATED 3 /* device already created */ |
| 153 | #define OF_POPULATED_BUS 4 /* platform bus created for children */ |
| 154 | #define OF_OVERLAY 5 /* allocated for an overlay */ |
| 155 | #define OF_OVERLAY_FREE_CSET 6 /* in overlay cset being freed */ |
| 156 | |
| 157 | #define OF_BAD_ADDR ((u64)-1) |
| 158 | |
| 159 | #ifdef CONFIG_OF |
| 160 | void of_core_init(void); |
| 161 | |
| 162 | static inline bool is_of_node(const struct fwnode_handle *fwnode) |
| 163 | { |
| 164 | return !IS_ERR_OR_NULL(fwnode) && fwnode->ops == &of_fwnode_ops; |
| 165 | } |
| 166 | |
| 167 | #define to_of_node(__fwnode) \ |
| 168 | ({ \ |
| 169 | typeof(__fwnode) __to_of_node_fwnode = (__fwnode); \ |
| 170 | \ |
| 171 | is_of_node(__to_of_node_fwnode) ? \ |
| 172 | container_of(__to_of_node_fwnode, \ |
| 173 | struct device_node, fwnode) : \ |
| 174 | NULL; \ |
| 175 | }) |
| 176 | |
| 177 | #define of_fwnode_handle(node) \ |
| 178 | ({ \ |
| 179 | typeof(node) __of_fwnode_handle_node = (node); \ |
| 180 | \ |
| 181 | __of_fwnode_handle_node ? \ |
| 182 | &__of_fwnode_handle_node->fwnode : NULL; \ |
| 183 | }) |
| 184 | |
| 185 | static inline bool of_node_is_root(const struct device_node *node) |
| 186 | { |
| 187 | return node && (node->parent == NULL); |
| 188 | } |
| 189 | |
| 190 | static inline int of_node_check_flag(const struct device_node *n, unsigned long flag) |
| 191 | { |
| 192 | return test_bit(flag, &n->_flags); |
| 193 | } |
| 194 | |
| 195 | static inline int of_node_test_and_set_flag(struct device_node *n, |
| 196 | unsigned long flag) |
| 197 | { |
| 198 | return test_and_set_bit(flag, &n->_flags); |
| 199 | } |
| 200 | |
| 201 | static inline void of_node_set_flag(struct device_node *n, unsigned long flag) |
| 202 | { |
| 203 | set_bit(flag, &n->_flags); |
| 204 | } |
| 205 | |
| 206 | static inline void of_node_clear_flag(struct device_node *n, unsigned long flag) |
| 207 | { |
| 208 | clear_bit(flag, &n->_flags); |
| 209 | } |
| 210 | |
| 211 | #if defined(CONFIG_OF_DYNAMIC) || defined(CONFIG_SPARC) |
| 212 | static inline int of_property_check_flag(const struct property *p, unsigned long flag) |
| 213 | { |
| 214 | return test_bit(flag, &p->_flags); |
| 215 | } |
| 216 | |
| 217 | static inline void of_property_set_flag(struct property *p, unsigned long flag) |
| 218 | { |
| 219 | set_bit(flag, &p->_flags); |
| 220 | } |
| 221 | |
| 222 | static inline void of_property_clear_flag(struct property *p, unsigned long flag) |
| 223 | { |
| 224 | clear_bit(flag, &p->_flags); |
| 225 | } |
| 226 | #endif |
| 227 | |
| 228 | extern struct device_node *__of_find_all_nodes(struct device_node *prev); |
| 229 | extern struct device_node *of_find_all_nodes(struct device_node *prev); |
| 230 | |
| 231 | /* |
| 232 | * OF address retrieval & translation |
| 233 | */ |
| 234 | |
| 235 | /* Helper to read a big number; size is in cells (not bytes) */ |
| 236 | static inline u64 of_read_number(const __be32 *cell, int size) |
| 237 | { |
| 238 | u64 r = 0; |
| 239 | for (; size--; cell++) |
| 240 | r = (r << 32) | be32_to_cpu(*cell); |
| 241 | return r; |
| 242 | } |
| 243 | |
| 244 | /* Like of_read_number, but we want an unsigned long result */ |
| 245 | static inline unsigned long of_read_ulong(const __be32 *cell, int size) |
| 246 | { |
| 247 | /* toss away upper bits if unsigned long is smaller than u64 */ |
| 248 | return of_read_number(cell, size); |
| 249 | } |
| 250 | |
| 251 | #if defined(CONFIG_SPARC) |
| 252 | #include <asm/prom.h> |
| 253 | #endif |
| 254 | |
| 255 | #define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags) |
| 256 | #define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags) |
| 257 | |
| 258 | extern bool of_node_name_eq(const struct device_node *np, const char *name); |
| 259 | extern bool of_node_name_prefix(const struct device_node *np, const char *prefix); |
| 260 | |
| 261 | static inline const char *of_node_full_name(const struct device_node *np) |
| 262 | { |
| 263 | return np ? np->full_name : "<no-node>"; |
| 264 | } |
| 265 | |
| 266 | #define for_each_of_allnodes_from(from, dn) \ |
| 267 | for (dn = __of_find_all_nodes(from); dn; dn = __of_find_all_nodes(dn)) |
| 268 | #define for_each_of_allnodes(dn) for_each_of_allnodes_from(NULL, dn) |
| 269 | extern struct device_node *of_find_node_by_name(struct device_node *from, |
| 270 | const char *name); |
| 271 | extern struct device_node *of_find_node_by_type(struct device_node *from, |
| 272 | const char *type); |
| 273 | extern struct device_node *of_find_compatible_node(struct device_node *from, |
| 274 | const char *type, const char *compat); |
| 275 | extern struct device_node *of_find_matching_node_and_match( |
| 276 | struct device_node *from, |
| 277 | const struct of_device_id *matches, |
| 278 | const struct of_device_id **match); |
| 279 | |
| 280 | extern struct device_node *of_find_node_opts_by_path(const char *path, |
| 281 | const char **opts); |
| 282 | static inline struct device_node *of_find_node_by_path(const char *path) |
| 283 | { |
| 284 | return of_find_node_opts_by_path(path, NULL); |
| 285 | } |
| 286 | |
| 287 | extern struct device_node *of_find_node_by_phandle(phandle handle); |
| 288 | extern struct device_node *of_get_parent(const struct device_node *node); |
| 289 | extern struct device_node *of_get_next_parent(struct device_node *node); |
| 290 | extern struct device_node *of_get_next_child(const struct device_node *node, |
| 291 | struct device_node *prev); |
| 292 | extern struct device_node *of_get_next_available_child( |
| 293 | const struct device_node *node, struct device_node *prev); |
| 294 | extern struct device_node *of_get_next_reserved_child( |
| 295 | const struct device_node *node, struct device_node *prev); |
| 296 | |
| 297 | extern struct device_node *of_get_compatible_child(const struct device_node *parent, |
| 298 | const char *compatible); |
| 299 | extern struct device_node *of_get_child_by_name(const struct device_node *node, |
| 300 | const char *name); |
| 301 | |
| 302 | /* cache lookup */ |
| 303 | extern struct device_node *of_find_next_cache_node(const struct device_node *); |
| 304 | extern int of_find_last_cache_level(unsigned int cpu); |
| 305 | extern struct device_node *of_find_node_with_property( |
| 306 | struct device_node *from, const char *prop_name); |
| 307 | |
| 308 | extern struct property *of_find_property(const struct device_node *np, |
| 309 | const char *name, |
| 310 | int *lenp); |
| 311 | extern int of_property_count_elems_of_size(const struct device_node *np, |
| 312 | const char *propname, int elem_size); |
| 313 | extern int of_property_read_u32_index(const struct device_node *np, |
| 314 | const char *propname, |
| 315 | u32 index, u32 *out_value); |
| 316 | extern int of_property_read_u64_index(const struct device_node *np, |
| 317 | const char *propname, |
| 318 | u32 index, u64 *out_value); |
| 319 | extern int of_property_read_variable_u8_array(const struct device_node *np, |
| 320 | const char *propname, u8 *out_values, |
| 321 | size_t sz_min, size_t sz_max); |
| 322 | extern int of_property_read_variable_u16_array(const struct device_node *np, |
| 323 | const char *propname, u16 *out_values, |
| 324 | size_t sz_min, size_t sz_max); |
| 325 | extern int of_property_read_variable_u32_array(const struct device_node *np, |
| 326 | const char *propname, |
| 327 | u32 *out_values, |
| 328 | size_t sz_min, |
| 329 | size_t sz_max); |
| 330 | extern int of_property_read_u64(const struct device_node *np, |
| 331 | const char *propname, u64 *out_value); |
| 332 | extern int of_property_read_variable_u64_array(const struct device_node *np, |
| 333 | const char *propname, |
| 334 | u64 *out_values, |
| 335 | size_t sz_min, |
| 336 | size_t sz_max); |
| 337 | |
| 338 | extern int of_property_read_string(const struct device_node *np, |
| 339 | const char *propname, |
| 340 | const char **out_string); |
| 341 | extern int of_property_match_string(const struct device_node *np, |
| 342 | const char *propname, |
| 343 | const char *string); |
| 344 | extern int of_property_read_string_helper(const struct device_node *np, |
| 345 | const char *propname, |
| 346 | const char **out_strs, size_t sz, int index); |
| 347 | extern int of_device_is_compatible(const struct device_node *device, |
| 348 | const char *); |
| 349 | extern int of_device_compatible_match(const struct device_node *device, |
| 350 | const char *const *compat); |
| 351 | extern bool of_device_is_available(const struct device_node *device); |
| 352 | extern bool of_device_is_big_endian(const struct device_node *device); |
| 353 | extern const void *of_get_property(const struct device_node *node, |
| 354 | const char *name, |
| 355 | int *lenp); |
| 356 | extern struct device_node *of_get_cpu_node(int cpu, unsigned int *thread); |
| 357 | extern struct device_node *of_cpu_device_node_get(int cpu); |
| 358 | extern int of_cpu_node_to_id(struct device_node *np); |
| 359 | extern struct device_node *of_get_next_cpu_node(struct device_node *prev); |
| 360 | extern struct device_node *of_get_cpu_state_node(struct device_node *cpu_node, |
| 361 | int index); |
| 362 | extern u64 of_get_cpu_hwid(struct device_node *cpun, unsigned int thread); |
| 363 | |
| 364 | extern int of_n_addr_cells(struct device_node *np); |
| 365 | extern int of_n_size_cells(struct device_node *np); |
| 366 | extern const struct of_device_id *of_match_node( |
| 367 | const struct of_device_id *matches, const struct device_node *node); |
| 368 | extern const void *of_device_get_match_data(const struct device *dev); |
| 369 | extern int of_alias_from_compatible(const struct device_node *node, char *alias, |
| 370 | int len); |
| 371 | extern void of_print_phandle_args(const char *msg, const struct of_phandle_args *args); |
| 372 | extern int __of_parse_phandle_with_args(const struct device_node *np, |
| 373 | const char *list_name, const char *cells_name, int cell_count, |
| 374 | int index, struct of_phandle_args *out_args); |
| 375 | extern int of_parse_phandle_with_args_map(const struct device_node *np, |
| 376 | const char *list_name, const char *stem_name, int index, |
| 377 | struct of_phandle_args *out_args); |
| 378 | extern int of_count_phandle_with_args(const struct device_node *np, |
| 379 | const char *list_name, const char *cells_name); |
| 380 | |
| 381 | /* module functions */ |
| 382 | extern ssize_t of_modalias(const struct device_node *np, char *str, ssize_t len); |
| 383 | extern int of_request_module(const struct device_node *np); |
| 384 | |
| 385 | /* phandle iterator functions */ |
| 386 | extern int of_phandle_iterator_init(struct of_phandle_iterator *it, |
| 387 | const struct device_node *np, |
| 388 | const char *list_name, |
| 389 | const char *cells_name, |
| 390 | int cell_count); |
| 391 | |
| 392 | extern int of_phandle_iterator_next(struct of_phandle_iterator *it); |
| 393 | extern int of_phandle_iterator_args(struct of_phandle_iterator *it, |
| 394 | uint32_t *args, |
| 395 | int size); |
| 396 | |
| 397 | extern void of_alias_scan(void * (*dt_alloc)(u64 size, u64 align)); |
| 398 | extern int of_alias_get_id(struct device_node *np, const char *stem); |
| 399 | extern int of_alias_get_highest_id(const char *stem); |
| 400 | |
| 401 | bool of_machine_compatible_match(const char *const *compats); |
| 402 | |
| 403 | /** |
| 404 | * of_machine_is_compatible - Test root of device tree for a given compatible value |
| 405 | * @compat: compatible string to look for in root node's compatible property. |
| 406 | * |
| 407 | * Return: true if the root node has the given value in its compatible property. |
| 408 | */ |
| 409 | static inline bool of_machine_is_compatible(const char *compat) |
| 410 | { |
| 411 | const char *compats[] = { compat, NULL }; |
| 412 | |
| 413 | return of_machine_compatible_match(compats); |
| 414 | } |
| 415 | |
| 416 | extern int of_add_property(struct device_node *np, struct property *prop); |
| 417 | extern int of_remove_property(struct device_node *np, struct property *prop); |
| 418 | extern int of_update_property(struct device_node *np, struct property *newprop); |
| 419 | |
| 420 | /* For updating the device tree at runtime */ |
| 421 | #define OF_RECONFIG_ATTACH_NODE 0x0001 |
| 422 | #define OF_RECONFIG_DETACH_NODE 0x0002 |
| 423 | #define OF_RECONFIG_ADD_PROPERTY 0x0003 |
| 424 | #define OF_RECONFIG_REMOVE_PROPERTY 0x0004 |
| 425 | #define OF_RECONFIG_UPDATE_PROPERTY 0x0005 |
| 426 | |
| 427 | extern int of_attach_node(struct device_node *); |
| 428 | extern int of_detach_node(struct device_node *); |
| 429 | |
| 430 | #define of_match_ptr(_ptr) (_ptr) |
| 431 | |
| 432 | /* |
| 433 | * u32 u; |
| 434 | * |
| 435 | * of_property_for_each_u32(np, "propname", u) |
| 436 | * printk("U32 value: %x\n", u); |
| 437 | */ |
| 438 | const __be32 *of_prop_next_u32(struct property *prop, const __be32 *cur, |
| 439 | u32 *pu); |
| 440 | /* |
| 441 | * struct property *prop; |
| 442 | * const char *s; |
| 443 | * |
| 444 | * of_property_for_each_string(np, "propname", prop, s) |
| 445 | * printk("String value: %s\n", s); |
| 446 | */ |
| 447 | const char *of_prop_next_string(struct property *prop, const char *cur); |
| 448 | |
| 449 | bool of_console_check(struct device_node *dn, char *name, int index); |
| 450 | |
| 451 | int of_map_id(struct device_node *np, u32 id, |
| 452 | const char *map_name, const char *map_mask_name, |
| 453 | struct device_node **target, u32 *id_out); |
| 454 | |
| 455 | phys_addr_t of_dma_get_max_cpu_address(struct device_node *np); |
| 456 | |
| 457 | struct kimage; |
| 458 | void *of_kexec_alloc_and_setup_fdt(const struct kimage *image, |
| 459 | unsigned long initrd_load_addr, |
| 460 | unsigned long initrd_len, |
| 461 | const char *cmdline, size_t extra_fdt_size); |
| 462 | #else /* CONFIG_OF */ |
| 463 | |
| 464 | static inline void of_core_init(void) |
| 465 | { |
| 466 | } |
| 467 | |
| 468 | static inline bool is_of_node(const struct fwnode_handle *fwnode) |
| 469 | { |
| 470 | return false; |
| 471 | } |
| 472 | |
| 473 | static inline struct device_node *to_of_node(const struct fwnode_handle *fwnode) |
| 474 | { |
| 475 | return NULL; |
| 476 | } |
| 477 | |
| 478 | static inline bool of_node_name_eq(const struct device_node *np, const char *name) |
| 479 | { |
| 480 | return false; |
| 481 | } |
| 482 | |
| 483 | static inline bool of_node_name_prefix(const struct device_node *np, const char *prefix) |
| 484 | { |
| 485 | return false; |
| 486 | } |
| 487 | |
| 488 | static inline const char* of_node_full_name(const struct device_node *np) |
| 489 | { |
| 490 | return "<no-node>"; |
| 491 | } |
| 492 | |
| 493 | static inline struct device_node *of_find_node_by_name(struct device_node *from, |
| 494 | const char *name) |
| 495 | { |
| 496 | return NULL; |
| 497 | } |
| 498 | |
| 499 | static inline struct device_node *of_find_node_by_type(struct device_node *from, |
| 500 | const char *type) |
| 501 | { |
| 502 | return NULL; |
| 503 | } |
| 504 | |
| 505 | static inline struct device_node *of_find_matching_node_and_match( |
| 506 | struct device_node *from, |
| 507 | const struct of_device_id *matches, |
| 508 | const struct of_device_id **match) |
| 509 | { |
| 510 | return NULL; |
| 511 | } |
| 512 | |
| 513 | static inline struct device_node *of_find_node_by_path(const char *path) |
| 514 | { |
| 515 | return NULL; |
| 516 | } |
| 517 | |
| 518 | static inline struct device_node *of_find_node_opts_by_path(const char *path, |
| 519 | const char **opts) |
| 520 | { |
| 521 | return NULL; |
| 522 | } |
| 523 | |
| 524 | static inline struct device_node *of_find_node_by_phandle(phandle handle) |
| 525 | { |
| 526 | return NULL; |
| 527 | } |
| 528 | |
| 529 | static inline struct device_node *of_get_parent(const struct device_node *node) |
| 530 | { |
| 531 | return NULL; |
| 532 | } |
| 533 | |
| 534 | static inline struct device_node *of_get_next_parent(struct device_node *node) |
| 535 | { |
| 536 | return NULL; |
| 537 | } |
| 538 | |
| 539 | static inline struct device_node *of_get_next_child( |
| 540 | const struct device_node *node, struct device_node *prev) |
| 541 | { |
| 542 | return NULL; |
| 543 | } |
| 544 | |
| 545 | static inline struct device_node *of_get_next_available_child( |
| 546 | const struct device_node *node, struct device_node *prev) |
| 547 | { |
| 548 | return NULL; |
| 549 | } |
| 550 | |
| 551 | static inline struct device_node *of_get_next_reserved_child( |
| 552 | const struct device_node *node, struct device_node *prev) |
| 553 | { |
| 554 | return NULL; |
| 555 | } |
| 556 | |
| 557 | static inline struct device_node *of_find_node_with_property( |
| 558 | struct device_node *from, const char *prop_name) |
| 559 | { |
| 560 | return NULL; |
| 561 | } |
| 562 | |
| 563 | #define of_fwnode_handle(node) NULL |
| 564 | |
| 565 | static inline struct device_node *of_get_compatible_child(const struct device_node *parent, |
| 566 | const char *compatible) |
| 567 | { |
| 568 | return NULL; |
| 569 | } |
| 570 | |
| 571 | static inline struct device_node *of_get_child_by_name( |
| 572 | const struct device_node *node, |
| 573 | const char *name) |
| 574 | { |
| 575 | return NULL; |
| 576 | } |
| 577 | |
| 578 | static inline int of_device_is_compatible(const struct device_node *device, |
| 579 | const char *name) |
| 580 | { |
| 581 | return 0; |
| 582 | } |
| 583 | |
| 584 | static inline int of_device_compatible_match(const struct device_node *device, |
| 585 | const char *const *compat) |
| 586 | { |
| 587 | return 0; |
| 588 | } |
| 589 | |
| 590 | static inline bool of_device_is_available(const struct device_node *device) |
| 591 | { |
| 592 | return false; |
| 593 | } |
| 594 | |
| 595 | static inline bool of_device_is_big_endian(const struct device_node *device) |
| 596 | { |
| 597 | return false; |
| 598 | } |
| 599 | |
| 600 | static inline struct property *of_find_property(const struct device_node *np, |
| 601 | const char *name, |
| 602 | int *lenp) |
| 603 | { |
| 604 | return NULL; |
| 605 | } |
| 606 | |
| 607 | static inline struct device_node *of_find_compatible_node( |
| 608 | struct device_node *from, |
| 609 | const char *type, |
| 610 | const char *compat) |
| 611 | { |
| 612 | return NULL; |
| 613 | } |
| 614 | |
| 615 | static inline int of_property_count_elems_of_size(const struct device_node *np, |
| 616 | const char *propname, int elem_size) |
| 617 | { |
| 618 | return -ENOSYS; |
| 619 | } |
| 620 | |
| 621 | static inline int of_property_read_u32_index(const struct device_node *np, |
| 622 | const char *propname, u32 index, u32 *out_value) |
| 623 | { |
| 624 | return -ENOSYS; |
| 625 | } |
| 626 | |
| 627 | static inline int of_property_read_u64_index(const struct device_node *np, |
| 628 | const char *propname, u32 index, u64 *out_value) |
| 629 | { |
| 630 | return -ENOSYS; |
| 631 | } |
| 632 | |
| 633 | static inline const void *of_get_property(const struct device_node *node, |
| 634 | const char *name, |
| 635 | int *lenp) |
| 636 | { |
| 637 | return NULL; |
| 638 | } |
| 639 | |
| 640 | static inline struct device_node *of_get_cpu_node(int cpu, |
| 641 | unsigned int *thread) |
| 642 | { |
| 643 | return NULL; |
| 644 | } |
| 645 | |
| 646 | static inline struct device_node *of_cpu_device_node_get(int cpu) |
| 647 | { |
| 648 | return NULL; |
| 649 | } |
| 650 | |
| 651 | static inline int of_cpu_node_to_id(struct device_node *np) |
| 652 | { |
| 653 | return -ENODEV; |
| 654 | } |
| 655 | |
| 656 | static inline struct device_node *of_get_next_cpu_node(struct device_node *prev) |
| 657 | { |
| 658 | return NULL; |
| 659 | } |
| 660 | |
| 661 | static inline struct device_node *of_get_cpu_state_node(struct device_node *cpu_node, |
| 662 | int index) |
| 663 | { |
| 664 | return NULL; |
| 665 | } |
| 666 | |
| 667 | static inline int of_n_addr_cells(struct device_node *np) |
| 668 | { |
| 669 | return 0; |
| 670 | |
| 671 | } |
| 672 | static inline int of_n_size_cells(struct device_node *np) |
| 673 | { |
| 674 | return 0; |
| 675 | } |
| 676 | |
| 677 | static inline int of_property_read_variable_u8_array(const struct device_node *np, |
| 678 | const char *propname, u8 *out_values, |
| 679 | size_t sz_min, size_t sz_max) |
| 680 | { |
| 681 | return -ENOSYS; |
| 682 | } |
| 683 | |
| 684 | static inline int of_property_read_variable_u16_array(const struct device_node *np, |
| 685 | const char *propname, u16 *out_values, |
| 686 | size_t sz_min, size_t sz_max) |
| 687 | { |
| 688 | return -ENOSYS; |
| 689 | } |
| 690 | |
| 691 | static inline int of_property_read_variable_u32_array(const struct device_node *np, |
| 692 | const char *propname, |
| 693 | u32 *out_values, |
| 694 | size_t sz_min, |
| 695 | size_t sz_max) |
| 696 | { |
| 697 | return -ENOSYS; |
| 698 | } |
| 699 | |
| 700 | static inline int of_property_read_u64(const struct device_node *np, |
| 701 | const char *propname, u64 *out_value) |
| 702 | { |
| 703 | return -ENOSYS; |
| 704 | } |
| 705 | |
| 706 | static inline int of_property_read_variable_u64_array(const struct device_node *np, |
| 707 | const char *propname, |
| 708 | u64 *out_values, |
| 709 | size_t sz_min, |
| 710 | size_t sz_max) |
| 711 | { |
| 712 | return -ENOSYS; |
| 713 | } |
| 714 | |
| 715 | static inline int of_property_read_string(const struct device_node *np, |
| 716 | const char *propname, |
| 717 | const char **out_string) |
| 718 | { |
| 719 | return -ENOSYS; |
| 720 | } |
| 721 | |
| 722 | static inline int of_property_match_string(const struct device_node *np, |
| 723 | const char *propname, |
| 724 | const char *string) |
| 725 | { |
| 726 | return -ENOSYS; |
| 727 | } |
| 728 | |
| 729 | static inline int of_property_read_string_helper(const struct device_node *np, |
| 730 | const char *propname, |
| 731 | const char **out_strs, size_t sz, int index) |
| 732 | { |
| 733 | return -ENOSYS; |
| 734 | } |
| 735 | |
| 736 | static inline int __of_parse_phandle_with_args(const struct device_node *np, |
| 737 | const char *list_name, |
| 738 | const char *cells_name, |
| 739 | int cell_count, |
| 740 | int index, |
| 741 | struct of_phandle_args *out_args) |
| 742 | { |
| 743 | return -ENOSYS; |
| 744 | } |
| 745 | |
| 746 | static inline int of_parse_phandle_with_args_map(const struct device_node *np, |
| 747 | const char *list_name, |
| 748 | const char *stem_name, |
| 749 | int index, |
| 750 | struct of_phandle_args *out_args) |
| 751 | { |
| 752 | return -ENOSYS; |
| 753 | } |
| 754 | |
| 755 | static inline int of_count_phandle_with_args(const struct device_node *np, |
| 756 | const char *list_name, |
| 757 | const char *cells_name) |
| 758 | { |
| 759 | return -ENOSYS; |
| 760 | } |
| 761 | |
| 762 | static inline ssize_t of_modalias(const struct device_node *np, char *str, |
| 763 | ssize_t len) |
| 764 | { |
| 765 | return -ENODEV; |
| 766 | } |
| 767 | |
| 768 | static inline int of_request_module(const struct device_node *np) |
| 769 | { |
| 770 | return -ENODEV; |
| 771 | } |
| 772 | |
| 773 | static inline int of_phandle_iterator_init(struct of_phandle_iterator *it, |
| 774 | const struct device_node *np, |
| 775 | const char *list_name, |
| 776 | const char *cells_name, |
| 777 | int cell_count) |
| 778 | { |
| 779 | return -ENOSYS; |
| 780 | } |
| 781 | |
| 782 | static inline int of_phandle_iterator_next(struct of_phandle_iterator *it) |
| 783 | { |
| 784 | return -ENOSYS; |
| 785 | } |
| 786 | |
| 787 | static inline int of_phandle_iterator_args(struct of_phandle_iterator *it, |
| 788 | uint32_t *args, |
| 789 | int size) |
| 790 | { |
| 791 | return 0; |
| 792 | } |
| 793 | |
| 794 | static inline int of_alias_get_id(struct device_node *np, const char *stem) |
| 795 | { |
| 796 | return -ENOSYS; |
| 797 | } |
| 798 | |
| 799 | static inline int of_alias_get_highest_id(const char *stem) |
| 800 | { |
| 801 | return -ENOSYS; |
| 802 | } |
| 803 | |
| 804 | static inline int of_machine_is_compatible(const char *compat) |
| 805 | { |
| 806 | return 0; |
| 807 | } |
| 808 | |
| 809 | static inline int of_add_property(struct device_node *np, struct property *prop) |
| 810 | { |
| 811 | return 0; |
| 812 | } |
| 813 | |
| 814 | static inline int of_remove_property(struct device_node *np, struct property *prop) |
| 815 | { |
| 816 | return 0; |
| 817 | } |
| 818 | |
| 819 | static inline bool of_machine_compatible_match(const char *const *compats) |
| 820 | { |
| 821 | return false; |
| 822 | } |
| 823 | |
| 824 | static inline bool of_console_check(const struct device_node *dn, const char *name, int index) |
| 825 | { |
| 826 | return false; |
| 827 | } |
| 828 | |
| 829 | static inline const __be32 *of_prop_next_u32(struct property *prop, |
| 830 | const __be32 *cur, u32 *pu) |
| 831 | { |
| 832 | return NULL; |
| 833 | } |
| 834 | |
| 835 | static inline const char *of_prop_next_string(struct property *prop, |
| 836 | const char *cur) |
| 837 | { |
| 838 | return NULL; |
| 839 | } |
| 840 | |
| 841 | static inline int of_node_check_flag(struct device_node *n, unsigned long flag) |
| 842 | { |
| 843 | return 0; |
| 844 | } |
| 845 | |
| 846 | static inline int of_node_test_and_set_flag(struct device_node *n, |
| 847 | unsigned long flag) |
| 848 | { |
| 849 | return 0; |
| 850 | } |
| 851 | |
| 852 | static inline void of_node_set_flag(struct device_node *n, unsigned long flag) |
| 853 | { |
| 854 | } |
| 855 | |
| 856 | static inline void of_node_clear_flag(struct device_node *n, unsigned long flag) |
| 857 | { |
| 858 | } |
| 859 | |
| 860 | static inline int of_property_check_flag(const struct property *p, |
| 861 | unsigned long flag) |
| 862 | { |
| 863 | return 0; |
| 864 | } |
| 865 | |
| 866 | static inline void of_property_set_flag(struct property *p, unsigned long flag) |
| 867 | { |
| 868 | } |
| 869 | |
| 870 | static inline void of_property_clear_flag(struct property *p, unsigned long flag) |
| 871 | { |
| 872 | } |
| 873 | |
| 874 | static inline int of_map_id(struct device_node *np, u32 id, |
| 875 | const char *map_name, const char *map_mask_name, |
| 876 | struct device_node **target, u32 *id_out) |
| 877 | { |
| 878 | return -EINVAL; |
| 879 | } |
| 880 | |
| 881 | static inline phys_addr_t of_dma_get_max_cpu_address(struct device_node *np) |
| 882 | { |
| 883 | return PHYS_ADDR_MAX; |
| 884 | } |
| 885 | |
| 886 | static inline const void *of_device_get_match_data(const struct device *dev) |
| 887 | { |
| 888 | return NULL; |
| 889 | } |
| 890 | |
| 891 | #define of_match_ptr(_ptr) NULL |
| 892 | #define of_match_node(_matches, _node) NULL |
| 893 | #endif /* CONFIG_OF */ |
| 894 | |
| 895 | /* Default string compare functions, Allow arch asm/prom.h to override */ |
| 896 | #if !defined(of_compat_cmp) |
| 897 | #define of_compat_cmp(s1, s2, l) strcasecmp((s1), (s2)) |
| 898 | #define of_prop_cmp(s1, s2) strcmp((s1), (s2)) |
| 899 | #define of_node_cmp(s1, s2) strcasecmp((s1), (s2)) |
| 900 | #endif |
| 901 | |
| 902 | static inline int of_prop_val_eq(struct property *p1, struct property *p2) |
| 903 | { |
| 904 | return p1->length == p2->length && |
| 905 | !memcmp(p1->value, p2->value, (size_t)p1->length); |
| 906 | } |
| 907 | |
| 908 | #define for_each_property_of_node(dn, pp) \ |
| 909 | for (pp = dn->properties; pp != NULL; pp = pp->next) |
| 910 | |
| 911 | #if defined(CONFIG_OF) && defined(CONFIG_NUMA) |
| 912 | extern int of_node_to_nid(struct device_node *np); |
| 913 | #else |
| 914 | static inline int of_node_to_nid(struct device_node *device) |
| 915 | { |
| 916 | return NUMA_NO_NODE; |
| 917 | } |
| 918 | #endif |
| 919 | |
| 920 | #ifdef CONFIG_OF_NUMA |
| 921 | extern int of_numa_init(void); |
| 922 | #else |
| 923 | static inline int of_numa_init(void) |
| 924 | { |
| 925 | return -ENOSYS; |
| 926 | } |
| 927 | #endif |
| 928 | |
| 929 | static inline struct device_node *of_find_matching_node( |
| 930 | struct device_node *from, |
| 931 | const struct of_device_id *matches) |
| 932 | { |
| 933 | return of_find_matching_node_and_match(from, matches, NULL); |
| 934 | } |
| 935 | |
| 936 | static inline const char *of_node_get_device_type(const struct device_node *np) |
| 937 | { |
| 938 | return of_get_property(np, "device_type", NULL); |
| 939 | } |
| 940 | |
| 941 | static inline bool of_node_is_type(const struct device_node *np, const char *type) |
| 942 | { |
| 943 | const char *match = of_node_get_device_type(np); |
| 944 | |
| 945 | return np && match && type && !strcmp(match, type); |
| 946 | } |
| 947 | |
| 948 | /** |
| 949 | * of_parse_phandle - Resolve a phandle property to a device_node pointer |
| 950 | * @np: Pointer to device node holding phandle property |
| 951 | * @phandle_name: Name of property holding a phandle value |
| 952 | * @index: For properties holding a table of phandles, this is the index into |
| 953 | * the table |
| 954 | * |
| 955 | * Return: The device_node pointer with refcount incremented. Use |
| 956 | * of_node_put() on it when done. |
| 957 | */ |
| 958 | static inline struct device_node *of_parse_phandle(const struct device_node *np, |
| 959 | const char *phandle_name, |
| 960 | int index) |
| 961 | { |
| 962 | struct of_phandle_args args; |
| 963 | |
| 964 | if (__of_parse_phandle_with_args(np, phandle_name, NULL, 0, |
| 965 | index, &args)) |
| 966 | return NULL; |
| 967 | |
| 968 | return args.np; |
| 969 | } |
| 970 | |
| 971 | /** |
| 972 | * of_parse_phandle_with_args() - Find a node pointed by phandle in a list |
| 973 | * @np: pointer to a device tree node containing a list |
| 974 | * @list_name: property name that contains a list |
| 975 | * @cells_name: property name that specifies phandles' arguments count |
| 976 | * @index: index of a phandle to parse out |
| 977 | * @out_args: optional pointer to output arguments structure (will be filled) |
| 978 | * |
| 979 | * This function is useful to parse lists of phandles and their arguments. |
| 980 | * Returns 0 on success and fills out_args, on error returns appropriate |
| 981 | * errno value. |
| 982 | * |
| 983 | * Caller is responsible to call of_node_put() on the returned out_args->np |
| 984 | * pointer. |
| 985 | * |
| 986 | * Example:: |
| 987 | * |
| 988 | * phandle1: node1 { |
| 989 | * #list-cells = <2>; |
| 990 | * }; |
| 991 | * |
| 992 | * phandle2: node2 { |
| 993 | * #list-cells = <1>; |
| 994 | * }; |
| 995 | * |
| 996 | * node3 { |
| 997 | * list = <&phandle1 1 2 &phandle2 3>; |
| 998 | * }; |
| 999 | * |
| 1000 | * To get a device_node of the ``node2`` node you may call this: |
| 1001 | * of_parse_phandle_with_args(node3, "list", "#list-cells", 1, &args); |
| 1002 | */ |
| 1003 | static inline int of_parse_phandle_with_args(const struct device_node *np, |
| 1004 | const char *list_name, |
| 1005 | const char *cells_name, |
| 1006 | int index, |
| 1007 | struct of_phandle_args *out_args) |
| 1008 | { |
| 1009 | int cell_count = -1; |
| 1010 | |
| 1011 | /* If cells_name is NULL we assume a cell count of 0 */ |
| 1012 | if (!cells_name) |
| 1013 | cell_count = 0; |
| 1014 | |
| 1015 | return __of_parse_phandle_with_args(np, list_name, cells_name, |
| 1016 | cell_count, index, out_args); |
| 1017 | } |
| 1018 | |
| 1019 | /** |
| 1020 | * of_parse_phandle_with_fixed_args() - Find a node pointed by phandle in a list |
| 1021 | * @np: pointer to a device tree node containing a list |
| 1022 | * @list_name: property name that contains a list |
| 1023 | * @cell_count: number of argument cells following the phandle |
| 1024 | * @index: index of a phandle to parse out |
| 1025 | * @out_args: optional pointer to output arguments structure (will be filled) |
| 1026 | * |
| 1027 | * This function is useful to parse lists of phandles and their arguments. |
| 1028 | * Returns 0 on success and fills out_args, on error returns appropriate |
| 1029 | * errno value. |
| 1030 | * |
| 1031 | * Caller is responsible to call of_node_put() on the returned out_args->np |
| 1032 | * pointer. |
| 1033 | * |
| 1034 | * Example:: |
| 1035 | * |
| 1036 | * phandle1: node1 { |
| 1037 | * }; |
| 1038 | * |
| 1039 | * phandle2: node2 { |
| 1040 | * }; |
| 1041 | * |
| 1042 | * node3 { |
| 1043 | * list = <&phandle1 0 2 &phandle2 2 3>; |
| 1044 | * }; |
| 1045 | * |
| 1046 | * To get a device_node of the ``node2`` node you may call this: |
| 1047 | * of_parse_phandle_with_fixed_args(node3, "list", 2, 1, &args); |
| 1048 | */ |
| 1049 | static inline int of_parse_phandle_with_fixed_args(const struct device_node *np, |
| 1050 | const char *list_name, |
| 1051 | int cell_count, |
| 1052 | int index, |
| 1053 | struct of_phandle_args *out_args) |
| 1054 | { |
| 1055 | return __of_parse_phandle_with_args(np, list_name, NULL, cell_count, |
| 1056 | index, out_args); |
| 1057 | } |
| 1058 | |
| 1059 | /** |
| 1060 | * of_parse_phandle_with_optional_args() - Find a node pointed by phandle in a list |
| 1061 | * @np: pointer to a device tree node containing a list |
| 1062 | * @list_name: property name that contains a list |
| 1063 | * @cells_name: property name that specifies phandles' arguments count |
| 1064 | * @index: index of a phandle to parse out |
| 1065 | * @out_args: optional pointer to output arguments structure (will be filled) |
| 1066 | * |
| 1067 | * Same as of_parse_phandle_with_args() except that if the cells_name property |
| 1068 | * is not found, cell_count of 0 is assumed. |
| 1069 | * |
| 1070 | * This is used to useful, if you have a phandle which didn't have arguments |
| 1071 | * before and thus doesn't have a '#*-cells' property but is now migrated to |
| 1072 | * having arguments while retaining backwards compatibility. |
| 1073 | */ |
| 1074 | static inline int of_parse_phandle_with_optional_args(const struct device_node *np, |
| 1075 | const char *list_name, |
| 1076 | const char *cells_name, |
| 1077 | int index, |
| 1078 | struct of_phandle_args *out_args) |
| 1079 | { |
| 1080 | return __of_parse_phandle_with_args(np, list_name, cells_name, |
| 1081 | 0, index, out_args); |
| 1082 | } |
| 1083 | |
| 1084 | /** |
| 1085 | * of_phandle_args_equal() - Compare two of_phandle_args |
| 1086 | * @a1: First of_phandle_args to compare |
| 1087 | * @a2: Second of_phandle_args to compare |
| 1088 | * |
| 1089 | * Return: True if a1 and a2 are the same (same node pointer, same phandle |
| 1090 | * args), false otherwise. |
| 1091 | */ |
| 1092 | static inline bool of_phandle_args_equal(const struct of_phandle_args *a1, |
| 1093 | const struct of_phandle_args *a2) |
| 1094 | { |
| 1095 | return a1->np == a2->np && |
| 1096 | a1->args_count == a2->args_count && |
| 1097 | !memcmp(a1->args, a2->args, sizeof(a1->args[0]) * a1->args_count); |
| 1098 | } |
| 1099 | |
| 1100 | /** |
| 1101 | * of_property_count_u8_elems - Count the number of u8 elements in a property |
| 1102 | * |
| 1103 | * @np: device node from which the property value is to be read. |
| 1104 | * @propname: name of the property to be searched. |
| 1105 | * |
| 1106 | * Search for a property in a device node and count the number of u8 elements |
| 1107 | * in it. |
| 1108 | * |
| 1109 | * Return: The number of elements on sucess, -EINVAL if the property does |
| 1110 | * not exist or its length does not match a multiple of u8 and -ENODATA if the |
| 1111 | * property does not have a value. |
| 1112 | */ |
| 1113 | static inline int of_property_count_u8_elems(const struct device_node *np, |
| 1114 | const char *propname) |
| 1115 | { |
| 1116 | return of_property_count_elems_of_size(np, propname, sizeof(u8)); |
| 1117 | } |
| 1118 | |
| 1119 | /** |
| 1120 | * of_property_count_u16_elems - Count the number of u16 elements in a property |
| 1121 | * |
| 1122 | * @np: device node from which the property value is to be read. |
| 1123 | * @propname: name of the property to be searched. |
| 1124 | * |
| 1125 | * Search for a property in a device node and count the number of u16 elements |
| 1126 | * in it. |
| 1127 | * |
| 1128 | * Return: The number of elements on sucess, -EINVAL if the property does |
| 1129 | * not exist or its length does not match a multiple of u16 and -ENODATA if the |
| 1130 | * property does not have a value. |
| 1131 | */ |
| 1132 | static inline int of_property_count_u16_elems(const struct device_node *np, |
| 1133 | const char *propname) |
| 1134 | { |
| 1135 | return of_property_count_elems_of_size(np, propname, sizeof(u16)); |
| 1136 | } |
| 1137 | |
| 1138 | /** |
| 1139 | * of_property_count_u32_elems - Count the number of u32 elements in a property |
| 1140 | * |
| 1141 | * @np: device node from which the property value is to be read. |
| 1142 | * @propname: name of the property to be searched. |
| 1143 | * |
| 1144 | * Search for a property in a device node and count the number of u32 elements |
| 1145 | * in it. |
| 1146 | * |
| 1147 | * Return: The number of elements on sucess, -EINVAL if the property does |
| 1148 | * not exist or its length does not match a multiple of u32 and -ENODATA if the |
| 1149 | * property does not have a value. |
| 1150 | */ |
| 1151 | static inline int of_property_count_u32_elems(const struct device_node *np, |
| 1152 | const char *propname) |
| 1153 | { |
| 1154 | return of_property_count_elems_of_size(np, propname, sizeof(u32)); |
| 1155 | } |
| 1156 | |
| 1157 | /** |
| 1158 | * of_property_count_u64_elems - Count the number of u64 elements in a property |
| 1159 | * |
| 1160 | * @np: device node from which the property value is to be read. |
| 1161 | * @propname: name of the property to be searched. |
| 1162 | * |
| 1163 | * Search for a property in a device node and count the number of u64 elements |
| 1164 | * in it. |
| 1165 | * |
| 1166 | * Return: The number of elements on sucess, -EINVAL if the property does |
| 1167 | * not exist or its length does not match a multiple of u64 and -ENODATA if the |
| 1168 | * property does not have a value. |
| 1169 | */ |
| 1170 | static inline int of_property_count_u64_elems(const struct device_node *np, |
| 1171 | const char *propname) |
| 1172 | { |
| 1173 | return of_property_count_elems_of_size(np, propname, sizeof(u64)); |
| 1174 | } |
| 1175 | |
| 1176 | /** |
| 1177 | * of_property_read_string_array() - Read an array of strings from a multiple |
| 1178 | * strings property. |
| 1179 | * @np: device node from which the property value is to be read. |
| 1180 | * @propname: name of the property to be searched. |
| 1181 | * @out_strs: output array of string pointers. |
| 1182 | * @sz: number of array elements to read. |
| 1183 | * |
| 1184 | * Search for a property in a device tree node and retrieve a list of |
| 1185 | * terminated string values (pointer to data, not a copy) in that property. |
| 1186 | * |
| 1187 | * Return: If @out_strs is NULL, the number of strings in the property is returned. |
| 1188 | */ |
| 1189 | static inline int of_property_read_string_array(const struct device_node *np, |
| 1190 | const char *propname, const char **out_strs, |
| 1191 | size_t sz) |
| 1192 | { |
| 1193 | return of_property_read_string_helper(np, propname, out_strs, sz, 0); |
| 1194 | } |
| 1195 | |
| 1196 | /** |
| 1197 | * of_property_count_strings() - Find and return the number of strings from a |
| 1198 | * multiple strings property. |
| 1199 | * @np: device node from which the property value is to be read. |
| 1200 | * @propname: name of the property to be searched. |
| 1201 | * |
| 1202 | * Search for a property in a device tree node and retrieve the number of null |
| 1203 | * terminated string contain in it. |
| 1204 | * |
| 1205 | * Return: The number of strings on success, -EINVAL if the property does not |
| 1206 | * exist, -ENODATA if property does not have a value, and -EILSEQ if the string |
| 1207 | * is not null-terminated within the length of the property data. |
| 1208 | */ |
| 1209 | static inline int of_property_count_strings(const struct device_node *np, |
| 1210 | const char *propname) |
| 1211 | { |
| 1212 | return of_property_read_string_helper(np, propname, NULL, 0, 0); |
| 1213 | } |
| 1214 | |
| 1215 | /** |
| 1216 | * of_property_read_string_index() - Find and read a string from a multiple |
| 1217 | * strings property. |
| 1218 | * @np: device node from which the property value is to be read. |
| 1219 | * @propname: name of the property to be searched. |
| 1220 | * @index: index of the string in the list of strings |
| 1221 | * @output: pointer to null terminated return string, modified only if |
| 1222 | * return value is 0. |
| 1223 | * |
| 1224 | * Search for a property in a device tree node and retrieve a null |
| 1225 | * terminated string value (pointer to data, not a copy) in the list of strings |
| 1226 | * contained in that property. |
| 1227 | * |
| 1228 | * Return: 0 on success, -EINVAL if the property does not exist, -ENODATA if |
| 1229 | * property does not have a value, and -EILSEQ if the string is not |
| 1230 | * null-terminated within the length of the property data. |
| 1231 | * |
| 1232 | * The out_string pointer is modified only if a valid string can be decoded. |
| 1233 | */ |
| 1234 | static inline int of_property_read_string_index(const struct device_node *np, |
| 1235 | const char *propname, |
| 1236 | int index, const char **output) |
| 1237 | { |
| 1238 | int rc = of_property_read_string_helper(np, propname, output, 1, index); |
| 1239 | return rc < 0 ? rc : 0; |
| 1240 | } |
| 1241 | |
| 1242 | /** |
| 1243 | * of_property_read_bool - Find a property |
| 1244 | * @np: device node from which the property value is to be read. |
| 1245 | * @propname: name of the property to be searched. |
| 1246 | * |
| 1247 | * Search for a boolean property in a device node. Usage on non-boolean |
| 1248 | * property types is deprecated. |
| 1249 | * |
| 1250 | * Return: true if the property exists false otherwise. |
| 1251 | */ |
| 1252 | static inline bool of_property_read_bool(const struct device_node *np, |
| 1253 | const char *propname) |
| 1254 | { |
| 1255 | struct property *prop = of_find_property(np, propname, NULL); |
| 1256 | |
| 1257 | return prop ? true : false; |
| 1258 | } |
| 1259 | |
| 1260 | /** |
| 1261 | * of_property_present - Test if a property is present in a node |
| 1262 | * @np: device node to search for the property. |
| 1263 | * @propname: name of the property to be searched. |
| 1264 | * |
| 1265 | * Test for a property present in a device node. |
| 1266 | * |
| 1267 | * Return: true if the property exists false otherwise. |
| 1268 | */ |
| 1269 | static inline bool of_property_present(const struct device_node *np, const char *propname) |
| 1270 | { |
| 1271 | return of_property_read_bool(np, propname); |
| 1272 | } |
| 1273 | |
| 1274 | /** |
| 1275 | * of_property_read_u8_array - Find and read an array of u8 from a property. |
| 1276 | * |
| 1277 | * @np: device node from which the property value is to be read. |
| 1278 | * @propname: name of the property to be searched. |
| 1279 | * @out_values: pointer to return value, modified only if return value is 0. |
| 1280 | * @sz: number of array elements to read |
| 1281 | * |
| 1282 | * Search for a property in a device node and read 8-bit value(s) from |
| 1283 | * it. |
| 1284 | * |
| 1285 | * dts entry of array should be like: |
| 1286 | * ``property = /bits/ 8 <0x50 0x60 0x70>;`` |
| 1287 | * |
| 1288 | * Return: 0 on success, -EINVAL if the property does not exist, |
| 1289 | * -ENODATA if property does not have a value, and -EOVERFLOW if the |
| 1290 | * property data isn't large enough. |
| 1291 | * |
| 1292 | * The out_values is modified only if a valid u8 value can be decoded. |
| 1293 | */ |
| 1294 | static inline int of_property_read_u8_array(const struct device_node *np, |
| 1295 | const char *propname, |
| 1296 | u8 *out_values, size_t sz) |
| 1297 | { |
| 1298 | int ret = of_property_read_variable_u8_array(np, propname, out_values, |
| 1299 | sz, 0); |
| 1300 | if (ret >= 0) |
| 1301 | return 0; |
| 1302 | else |
| 1303 | return ret; |
| 1304 | } |
| 1305 | |
| 1306 | /** |
| 1307 | * of_property_read_u16_array - Find and read an array of u16 from a property. |
| 1308 | * |
| 1309 | * @np: device node from which the property value is to be read. |
| 1310 | * @propname: name of the property to be searched. |
| 1311 | * @out_values: pointer to return value, modified only if return value is 0. |
| 1312 | * @sz: number of array elements to read |
| 1313 | * |
| 1314 | * Search for a property in a device node and read 16-bit value(s) from |
| 1315 | * it. |
| 1316 | * |
| 1317 | * dts entry of array should be like: |
| 1318 | * ``property = /bits/ 16 <0x5000 0x6000 0x7000>;`` |
| 1319 | * |
| 1320 | * Return: 0 on success, -EINVAL if the property does not exist, |
| 1321 | * -ENODATA if property does not have a value, and -EOVERFLOW if the |
| 1322 | * property data isn't large enough. |
| 1323 | * |
| 1324 | * The out_values is modified only if a valid u16 value can be decoded. |
| 1325 | */ |
| 1326 | static inline int of_property_read_u16_array(const struct device_node *np, |
| 1327 | const char *propname, |
| 1328 | u16 *out_values, size_t sz) |
| 1329 | { |
| 1330 | int ret = of_property_read_variable_u16_array(np, propname, out_values, |
| 1331 | sz, 0); |
| 1332 | if (ret >= 0) |
| 1333 | return 0; |
| 1334 | else |
| 1335 | return ret; |
| 1336 | } |
| 1337 | |
| 1338 | /** |
| 1339 | * of_property_read_u32_array - Find and read an array of 32 bit integers |
| 1340 | * from a property. |
| 1341 | * |
| 1342 | * @np: device node from which the property value is to be read. |
| 1343 | * @propname: name of the property to be searched. |
| 1344 | * @out_values: pointer to return value, modified only if return value is 0. |
| 1345 | * @sz: number of array elements to read |
| 1346 | * |
| 1347 | * Search for a property in a device node and read 32-bit value(s) from |
| 1348 | * it. |
| 1349 | * |
| 1350 | * Return: 0 on success, -EINVAL if the property does not exist, |
| 1351 | * -ENODATA if property does not have a value, and -EOVERFLOW if the |
| 1352 | * property data isn't large enough. |
| 1353 | * |
| 1354 | * The out_values is modified only if a valid u32 value can be decoded. |
| 1355 | */ |
| 1356 | static inline int of_property_read_u32_array(const struct device_node *np, |
| 1357 | const char *propname, |
| 1358 | u32 *out_values, size_t sz) |
| 1359 | { |
| 1360 | int ret = of_property_read_variable_u32_array(np, propname, out_values, |
| 1361 | sz, 0); |
| 1362 | if (ret >= 0) |
| 1363 | return 0; |
| 1364 | else |
| 1365 | return ret; |
| 1366 | } |
| 1367 | |
| 1368 | /** |
| 1369 | * of_property_read_u64_array - Find and read an array of 64 bit integers |
| 1370 | * from a property. |
| 1371 | * |
| 1372 | * @np: device node from which the property value is to be read. |
| 1373 | * @propname: name of the property to be searched. |
| 1374 | * @out_values: pointer to return value, modified only if return value is 0. |
| 1375 | * @sz: number of array elements to read |
| 1376 | * |
| 1377 | * Search for a property in a device node and read 64-bit value(s) from |
| 1378 | * it. |
| 1379 | * |
| 1380 | * Return: 0 on success, -EINVAL if the property does not exist, |
| 1381 | * -ENODATA if property does not have a value, and -EOVERFLOW if the |
| 1382 | * property data isn't large enough. |
| 1383 | * |
| 1384 | * The out_values is modified only if a valid u64 value can be decoded. |
| 1385 | */ |
| 1386 | static inline int of_property_read_u64_array(const struct device_node *np, |
| 1387 | const char *propname, |
| 1388 | u64 *out_values, size_t sz) |
| 1389 | { |
| 1390 | int ret = of_property_read_variable_u64_array(np, propname, out_values, |
| 1391 | sz, 0); |
| 1392 | if (ret >= 0) |
| 1393 | return 0; |
| 1394 | else |
| 1395 | return ret; |
| 1396 | } |
| 1397 | |
| 1398 | static inline int of_property_read_u8(const struct device_node *np, |
| 1399 | const char *propname, |
| 1400 | u8 *out_value) |
| 1401 | { |
| 1402 | return of_property_read_u8_array(np, propname, out_value, 1); |
| 1403 | } |
| 1404 | |
| 1405 | static inline int of_property_read_u16(const struct device_node *np, |
| 1406 | const char *propname, |
| 1407 | u16 *out_value) |
| 1408 | { |
| 1409 | return of_property_read_u16_array(np, propname, out_value, 1); |
| 1410 | } |
| 1411 | |
| 1412 | static inline int of_property_read_u32(const struct device_node *np, |
| 1413 | const char *propname, |
| 1414 | u32 *out_value) |
| 1415 | { |
| 1416 | return of_property_read_u32_array(np, propname, out_value, 1); |
| 1417 | } |
| 1418 | |
| 1419 | static inline int of_property_read_s32(const struct device_node *np, |
| 1420 | const char *propname, |
| 1421 | s32 *out_value) |
| 1422 | { |
| 1423 | return of_property_read_u32(np, propname, (u32*) out_value); |
| 1424 | } |
| 1425 | |
| 1426 | #define of_for_each_phandle(it, err, np, ln, cn, cc) \ |
| 1427 | for (of_phandle_iterator_init((it), (np), (ln), (cn), (cc)), \ |
| 1428 | err = of_phandle_iterator_next(it); \ |
| 1429 | err == 0; \ |
| 1430 | err = of_phandle_iterator_next(it)) |
| 1431 | |
| 1432 | #define of_property_for_each_u32(np, propname, u) \ |
| 1433 | for (struct {struct property *prop; const __be32 *item; } _it = \ |
| 1434 | {of_find_property(np, propname, NULL), \ |
| 1435 | of_prop_next_u32(_it.prop, NULL, &u)}; \ |
| 1436 | _it.item; \ |
| 1437 | _it.item = of_prop_next_u32(_it.prop, _it.item, &u)) |
| 1438 | |
| 1439 | #define of_property_for_each_string(np, propname, prop, s) \ |
| 1440 | for (prop = of_find_property(np, propname, NULL), \ |
| 1441 | s = of_prop_next_string(prop, NULL); \ |
| 1442 | s; \ |
| 1443 | s = of_prop_next_string(prop, s)) |
| 1444 | |
| 1445 | #define for_each_node_by_name(dn, name) \ |
| 1446 | for (dn = of_find_node_by_name(NULL, name); dn; \ |
| 1447 | dn = of_find_node_by_name(dn, name)) |
| 1448 | #define for_each_node_by_type(dn, type) \ |
| 1449 | for (dn = of_find_node_by_type(NULL, type); dn; \ |
| 1450 | dn = of_find_node_by_type(dn, type)) |
| 1451 | #define for_each_compatible_node(dn, type, compatible) \ |
| 1452 | for (dn = of_find_compatible_node(NULL, type, compatible); dn; \ |
| 1453 | dn = of_find_compatible_node(dn, type, compatible)) |
| 1454 | #define for_each_matching_node(dn, matches) \ |
| 1455 | for (dn = of_find_matching_node(NULL, matches); dn; \ |
| 1456 | dn = of_find_matching_node(dn, matches)) |
| 1457 | #define for_each_matching_node_and_match(dn, matches, match) \ |
| 1458 | for (dn = of_find_matching_node_and_match(NULL, matches, match); \ |
| 1459 | dn; dn = of_find_matching_node_and_match(dn, matches, match)) |
| 1460 | |
| 1461 | #define for_each_child_of_node(parent, child) \ |
| 1462 | for (child = of_get_next_child(parent, NULL); child != NULL; \ |
| 1463 | child = of_get_next_child(parent, child)) |
| 1464 | |
| 1465 | #define for_each_child_of_node_scoped(parent, child) \ |
| 1466 | for (struct device_node *child __free(device_node) = \ |
| 1467 | of_get_next_child(parent, NULL); \ |
| 1468 | child != NULL; \ |
| 1469 | child = of_get_next_child(parent, child)) |
| 1470 | |
| 1471 | #define for_each_available_child_of_node(parent, child) \ |
| 1472 | for (child = of_get_next_available_child(parent, NULL); child != NULL; \ |
| 1473 | child = of_get_next_available_child(parent, child)) |
| 1474 | #define for_each_reserved_child_of_node(parent, child) \ |
| 1475 | for (child = of_get_next_reserved_child(parent, NULL); child != NULL; \ |
| 1476 | child = of_get_next_reserved_child(parent, child)) |
| 1477 | |
| 1478 | #define for_each_available_child_of_node_scoped(parent, child) \ |
| 1479 | for (struct device_node *child __free(device_node) = \ |
| 1480 | of_get_next_available_child(parent, NULL); \ |
| 1481 | child != NULL; \ |
| 1482 | child = of_get_next_available_child(parent, child)) |
| 1483 | |
| 1484 | #define for_each_of_cpu_node(cpu) \ |
| 1485 | for (cpu = of_get_next_cpu_node(NULL); cpu != NULL; \ |
| 1486 | cpu = of_get_next_cpu_node(cpu)) |
| 1487 | |
| 1488 | #define for_each_node_with_property(dn, prop_name) \ |
| 1489 | for (dn = of_find_node_with_property(NULL, prop_name); dn; \ |
| 1490 | dn = of_find_node_with_property(dn, prop_name)) |
| 1491 | |
| 1492 | static inline int of_get_child_count(const struct device_node *np) |
| 1493 | { |
| 1494 | struct device_node *child; |
| 1495 | int num = 0; |
| 1496 | |
| 1497 | for_each_child_of_node(np, child) |
| 1498 | num++; |
| 1499 | |
| 1500 | return num; |
| 1501 | } |
| 1502 | |
| 1503 | static inline int of_get_available_child_count(const struct device_node *np) |
| 1504 | { |
| 1505 | struct device_node *child; |
| 1506 | int num = 0; |
| 1507 | |
| 1508 | for_each_available_child_of_node(np, child) |
| 1509 | num++; |
| 1510 | |
| 1511 | return num; |
| 1512 | } |
| 1513 | |
| 1514 | #define _OF_DECLARE_STUB(table, name, compat, fn, fn_type) \ |
| 1515 | static const struct of_device_id __of_table_##name \ |
| 1516 | __attribute__((unused)) \ |
| 1517 | = { .compatible = compat, \ |
| 1518 | .data = (fn == (fn_type)NULL) ? fn : fn } |
| 1519 | |
| 1520 | #if defined(CONFIG_OF) && !defined(MODULE) |
| 1521 | #define _OF_DECLARE(table, name, compat, fn, fn_type) \ |
| 1522 | static const struct of_device_id __of_table_##name \ |
| 1523 | __used __section("__" #table "_of_table") \ |
| 1524 | __aligned(__alignof__(struct of_device_id)) \ |
| 1525 | = { .compatible = compat, \ |
| 1526 | .data = (fn == (fn_type)NULL) ? fn : fn } |
| 1527 | #else |
| 1528 | #define _OF_DECLARE(table, name, compat, fn, fn_type) \ |
| 1529 | _OF_DECLARE_STUB(table, name, compat, fn, fn_type) |
| 1530 | #endif |
| 1531 | |
| 1532 | typedef int (*of_init_fn_2)(struct device_node *, struct device_node *); |
| 1533 | typedef int (*of_init_fn_1_ret)(struct device_node *); |
| 1534 | typedef void (*of_init_fn_1)(struct device_node *); |
| 1535 | |
| 1536 | #define OF_DECLARE_1(table, name, compat, fn) \ |
| 1537 | _OF_DECLARE(table, name, compat, fn, of_init_fn_1) |
| 1538 | #define OF_DECLARE_1_RET(table, name, compat, fn) \ |
| 1539 | _OF_DECLARE(table, name, compat, fn, of_init_fn_1_ret) |
| 1540 | #define OF_DECLARE_2(table, name, compat, fn) \ |
| 1541 | _OF_DECLARE(table, name, compat, fn, of_init_fn_2) |
| 1542 | |
| 1543 | /** |
| 1544 | * struct of_changeset_entry - Holds a changeset entry |
| 1545 | * |
| 1546 | * @node: list_head for the log list |
| 1547 | * @action: notifier action |
| 1548 | * @np: pointer to the device node affected |
| 1549 | * @prop: pointer to the property affected |
| 1550 | * @old_prop: hold a pointer to the original property |
| 1551 | * |
| 1552 | * Every modification of the device tree during a changeset |
| 1553 | * is held in a list of of_changeset_entry structures. |
| 1554 | * That way we can recover from a partial application, or we can |
| 1555 | * revert the changeset |
| 1556 | */ |
| 1557 | struct of_changeset_entry { |
| 1558 | struct list_head node; |
| 1559 | unsigned long action; |
| 1560 | struct device_node *np; |
| 1561 | struct property *prop; |
| 1562 | struct property *old_prop; |
| 1563 | }; |
| 1564 | |
| 1565 | /** |
| 1566 | * struct of_changeset - changeset tracker structure |
| 1567 | * |
| 1568 | * @entries: list_head for the changeset entries |
| 1569 | * |
| 1570 | * changesets are a convenient way to apply bulk changes to the |
| 1571 | * live tree. In case of an error, changes are rolled-back. |
| 1572 | * changesets live on after initial application, and if not |
| 1573 | * destroyed after use, they can be reverted in one single call. |
| 1574 | */ |
| 1575 | struct of_changeset { |
| 1576 | struct list_head entries; |
| 1577 | }; |
| 1578 | |
| 1579 | enum of_reconfig_change { |
| 1580 | OF_RECONFIG_NO_CHANGE = 0, |
| 1581 | OF_RECONFIG_CHANGE_ADD, |
| 1582 | OF_RECONFIG_CHANGE_REMOVE, |
| 1583 | }; |
| 1584 | |
| 1585 | struct notifier_block; |
| 1586 | |
| 1587 | #ifdef CONFIG_OF_DYNAMIC |
| 1588 | extern int of_reconfig_notifier_register(struct notifier_block *); |
| 1589 | extern int of_reconfig_notifier_unregister(struct notifier_block *); |
| 1590 | extern int of_reconfig_notify(unsigned long, struct of_reconfig_data *rd); |
| 1591 | extern int of_reconfig_get_state_change(unsigned long action, |
| 1592 | struct of_reconfig_data *arg); |
| 1593 | |
| 1594 | extern void of_changeset_init(struct of_changeset *ocs); |
| 1595 | extern void of_changeset_destroy(struct of_changeset *ocs); |
| 1596 | extern int of_changeset_apply(struct of_changeset *ocs); |
| 1597 | extern int of_changeset_revert(struct of_changeset *ocs); |
| 1598 | extern int of_changeset_action(struct of_changeset *ocs, |
| 1599 | unsigned long action, struct device_node *np, |
| 1600 | struct property *prop); |
| 1601 | |
| 1602 | static inline int of_changeset_attach_node(struct of_changeset *ocs, |
| 1603 | struct device_node *np) |
| 1604 | { |
| 1605 | return of_changeset_action(ocs, OF_RECONFIG_ATTACH_NODE, np, NULL); |
| 1606 | } |
| 1607 | |
| 1608 | static inline int of_changeset_detach_node(struct of_changeset *ocs, |
| 1609 | struct device_node *np) |
| 1610 | { |
| 1611 | return of_changeset_action(ocs, OF_RECONFIG_DETACH_NODE, np, NULL); |
| 1612 | } |
| 1613 | |
| 1614 | static inline int of_changeset_add_property(struct of_changeset *ocs, |
| 1615 | struct device_node *np, struct property *prop) |
| 1616 | { |
| 1617 | return of_changeset_action(ocs, OF_RECONFIG_ADD_PROPERTY, np, prop); |
| 1618 | } |
| 1619 | |
| 1620 | static inline int of_changeset_remove_property(struct of_changeset *ocs, |
| 1621 | struct device_node *np, struct property *prop) |
| 1622 | { |
| 1623 | return of_changeset_action(ocs, OF_RECONFIG_REMOVE_PROPERTY, np, prop); |
| 1624 | } |
| 1625 | |
| 1626 | static inline int of_changeset_update_property(struct of_changeset *ocs, |
| 1627 | struct device_node *np, struct property *prop) |
| 1628 | { |
| 1629 | return of_changeset_action(ocs, OF_RECONFIG_UPDATE_PROPERTY, np, prop); |
| 1630 | } |
| 1631 | |
| 1632 | struct device_node *of_changeset_create_node(struct of_changeset *ocs, |
| 1633 | struct device_node *parent, |
| 1634 | const char *full_name); |
| 1635 | int of_changeset_add_prop_string(struct of_changeset *ocs, |
| 1636 | struct device_node *np, |
| 1637 | const char *prop_name, const char *str); |
| 1638 | int of_changeset_add_prop_string_array(struct of_changeset *ocs, |
| 1639 | struct device_node *np, |
| 1640 | const char *prop_name, |
| 1641 | const char * const *str_array, size_t sz); |
| 1642 | int of_changeset_add_prop_u32_array(struct of_changeset *ocs, |
| 1643 | struct device_node *np, |
| 1644 | const char *prop_name, |
| 1645 | const u32 *array, size_t sz); |
| 1646 | static inline int of_changeset_add_prop_u32(struct of_changeset *ocs, |
| 1647 | struct device_node *np, |
| 1648 | const char *prop_name, |
| 1649 | const u32 val) |
| 1650 | { |
| 1651 | return of_changeset_add_prop_u32_array(ocs, np, prop_name, &val, 1); |
| 1652 | } |
| 1653 | |
| 1654 | int of_changeset_add_prop_bool(struct of_changeset *ocs, struct device_node *np, |
| 1655 | const char *prop_name); |
| 1656 | |
| 1657 | #else /* CONFIG_OF_DYNAMIC */ |
| 1658 | static inline int of_reconfig_notifier_register(struct notifier_block *nb) |
| 1659 | { |
| 1660 | return -EINVAL; |
| 1661 | } |
| 1662 | static inline int of_reconfig_notifier_unregister(struct notifier_block *nb) |
| 1663 | { |
| 1664 | return -EINVAL; |
| 1665 | } |
| 1666 | static inline int of_reconfig_notify(unsigned long action, |
| 1667 | struct of_reconfig_data *arg) |
| 1668 | { |
| 1669 | return -EINVAL; |
| 1670 | } |
| 1671 | static inline int of_reconfig_get_state_change(unsigned long action, |
| 1672 | struct of_reconfig_data *arg) |
| 1673 | { |
| 1674 | return -EINVAL; |
| 1675 | } |
| 1676 | #endif /* CONFIG_OF_DYNAMIC */ |
| 1677 | |
| 1678 | /** |
| 1679 | * of_device_is_system_power_controller - Tells if system-power-controller is found for device_node |
| 1680 | * @np: Pointer to the given device_node |
| 1681 | * |
| 1682 | * Return: true if present false otherwise |
| 1683 | */ |
| 1684 | static inline bool of_device_is_system_power_controller(const struct device_node *np) |
| 1685 | { |
| 1686 | return of_property_read_bool(np, "system-power-controller"); |
| 1687 | } |
| 1688 | |
| 1689 | /** |
| 1690 | * of_have_populated_dt() - Has DT been populated by bootloader |
| 1691 | * |
| 1692 | * Return: True if a DTB has been populated by the bootloader and it isn't the |
| 1693 | * empty builtin one. False otherwise. |
| 1694 | */ |
| 1695 | static inline bool of_have_populated_dt(void) |
| 1696 | { |
| 1697 | #ifdef CONFIG_OF |
| 1698 | return of_property_present(of_root, "compatible"); |
| 1699 | #else |
| 1700 | return false; |
| 1701 | #endif |
| 1702 | } |
| 1703 | |
| 1704 | /* |
| 1705 | * Overlay support |
| 1706 | */ |
| 1707 | |
| 1708 | enum of_overlay_notify_action { |
| 1709 | OF_OVERLAY_INIT = 0, /* kzalloc() of ovcs sets this value */ |
| 1710 | OF_OVERLAY_PRE_APPLY, |
| 1711 | OF_OVERLAY_POST_APPLY, |
| 1712 | OF_OVERLAY_PRE_REMOVE, |
| 1713 | OF_OVERLAY_POST_REMOVE, |
| 1714 | }; |
| 1715 | |
| 1716 | static inline const char *of_overlay_action_name(enum of_overlay_notify_action action) |
| 1717 | { |
| 1718 | static const char *const of_overlay_action_name[] = { |
| 1719 | "init", |
| 1720 | "pre-apply", |
| 1721 | "post-apply", |
| 1722 | "pre-remove", |
| 1723 | "post-remove", |
| 1724 | }; |
| 1725 | |
| 1726 | return of_overlay_action_name[action]; |
| 1727 | } |
| 1728 | |
| 1729 | struct of_overlay_notify_data { |
| 1730 | struct device_node *overlay; |
| 1731 | struct device_node *target; |
| 1732 | }; |
| 1733 | |
| 1734 | #ifdef CONFIG_OF_OVERLAY |
| 1735 | |
| 1736 | int of_overlay_fdt_apply(const void *overlay_fdt, u32 overlay_fdt_size, |
| 1737 | int *ovcs_id, struct device_node *target_base); |
| 1738 | int of_overlay_remove(int *ovcs_id); |
| 1739 | int of_overlay_remove_all(void); |
| 1740 | |
| 1741 | int of_overlay_notifier_register(struct notifier_block *nb); |
| 1742 | int of_overlay_notifier_unregister(struct notifier_block *nb); |
| 1743 | |
| 1744 | #else |
| 1745 | |
| 1746 | static inline int of_overlay_fdt_apply(const void *overlay_fdt, u32 overlay_fdt_size, |
| 1747 | int *ovcs_id, struct device_node *target_base) |
| 1748 | { |
| 1749 | return -ENOTSUPP; |
| 1750 | } |
| 1751 | |
| 1752 | static inline int of_overlay_remove(int *ovcs_id) |
| 1753 | { |
| 1754 | return -ENOTSUPP; |
| 1755 | } |
| 1756 | |
| 1757 | static inline int of_overlay_remove_all(void) |
| 1758 | { |
| 1759 | return -ENOTSUPP; |
| 1760 | } |
| 1761 | |
| 1762 | static inline int of_overlay_notifier_register(struct notifier_block *nb) |
| 1763 | { |
| 1764 | return 0; |
| 1765 | } |
| 1766 | |
| 1767 | static inline int of_overlay_notifier_unregister(struct notifier_block *nb) |
| 1768 | { |
| 1769 | return 0; |
| 1770 | } |
| 1771 | |
| 1772 | #endif |
| 1773 | |
| 1774 | #endif /* _LINUX_OF_H */ |