1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * property.h - Unified device property interface. 4 * 5 * Copyright (C) 2014, Intel Corporation 6 * Authors: Rafael J. Wysocki <rafael.j.wysocki@intel.com> 7 * Mika Westerberg <mika.westerberg@linux.intel.com> 8 */ 9 10 #ifndef _LINUX_PROPERTY_H_ 11 #define _LINUX_PROPERTY_H_ 12 13 #include <linux/args.h> 14 #include <linux/array_size.h> 15 #include <linux/bits.h> 16 #include <linux/cleanup.h> 17 #include <linux/fwnode.h> 18 #include <linux/stddef.h> 19 #include <linux/types.h> 20 #include <linux/util_macros.h> 21 22 struct device; 23 24 enum dev_prop_type { 25 DEV_PROP_U8, 26 DEV_PROP_U16, 27 DEV_PROP_U32, 28 DEV_PROP_U64, 29 DEV_PROP_STRING, 30 DEV_PROP_REF, 31 }; 32 33 const struct fwnode_handle *__dev_fwnode_const(const struct device *dev); 34 struct fwnode_handle *__dev_fwnode(struct device *dev); 35 #define dev_fwnode(dev) \ 36 _Generic((dev), \ 37 const struct device *: __dev_fwnode_const, \ 38 struct device *: __dev_fwnode)(dev) 39 40 bool device_property_present(const struct device *dev, const char *propname); 41 bool device_property_read_bool(const struct device *dev, const char *propname); 42 int device_property_read_u8_array(const struct device *dev, const char *propname, 43 u8 *val, size_t nval); 44 int device_property_read_u16_array(const struct device *dev, const char *propname, 45 u16 *val, size_t nval); 46 int device_property_read_u32_array(const struct device *dev, const char *propname, 47 u32 *val, size_t nval); 48 int device_property_read_u64_array(const struct device *dev, const char *propname, 49 u64 *val, size_t nval); 50 int device_property_read_string_array(const struct device *dev, const char *propname, 51 const char **val, size_t nval); 52 int device_property_read_string(const struct device *dev, const char *propname, 53 const char **val); 54 int device_property_match_string(const struct device *dev, 55 const char *propname, const char *string); 56 57 bool fwnode_property_present(const struct fwnode_handle *fwnode, 58 const char *propname); 59 bool fwnode_property_read_bool(const struct fwnode_handle *fwnode, 60 const char *propname); 61 int fwnode_property_read_u8_array(const struct fwnode_handle *fwnode, 62 const char *propname, u8 *val, 63 size_t nval); 64 int fwnode_property_read_u16_array(const struct fwnode_handle *fwnode, 65 const char *propname, u16 *val, 66 size_t nval); 67 int fwnode_property_read_u32_array(const struct fwnode_handle *fwnode, 68 const char *propname, u32 *val, 69 size_t nval); 70 int fwnode_property_read_u64_array(const struct fwnode_handle *fwnode, 71 const char *propname, u64 *val, 72 size_t nval); 73 int fwnode_property_read_string_array(const struct fwnode_handle *fwnode, 74 const char *propname, const char **val, 75 size_t nval); 76 int fwnode_property_read_string(const struct fwnode_handle *fwnode, 77 const char *propname, const char **val); 78 int fwnode_property_match_string(const struct fwnode_handle *fwnode, 79 const char *propname, const char *string); 80 81 bool fwnode_device_is_available(const struct fwnode_handle *fwnode); 82 83 static inline bool fwnode_device_is_big_endian(const struct fwnode_handle *fwnode) 84 { 85 if (fwnode_property_present(fwnode, "big-endian")) 86 return true; 87 if (IS_ENABLED(CONFIG_CPU_BIG_ENDIAN) && 88 fwnode_property_present(fwnode, "native-endian")) 89 return true; 90 return false; 91 } 92 93 static inline 94 bool fwnode_device_is_compatible(const struct fwnode_handle *fwnode, const char *compat) 95 { 96 return fwnode_property_match_string(fwnode, "compatible", compat) >= 0; 97 } 98 99 /** 100 * device_is_big_endian - check if a device has BE registers 101 * @dev: Pointer to the struct device 102 * 103 * Returns: true if the device has a "big-endian" property, or if the kernel 104 * was compiled for BE *and* the device has a "native-endian" property. 105 * Returns false otherwise. 106 * 107 * Callers would nominally use ioread32be/iowrite32be if 108 * device_is_big_endian() == true, or readl/writel otherwise. 109 */ 110 static inline bool device_is_big_endian(const struct device *dev) 111 { 112 return fwnode_device_is_big_endian(dev_fwnode(dev)); 113 } 114 115 /** 116 * device_is_compatible - match 'compatible' property of the device with a given string 117 * @dev: Pointer to the struct device 118 * @compat: The string to match 'compatible' property with 119 * 120 * Returns: true if matches, otherwise false. 121 */ 122 static inline bool device_is_compatible(const struct device *dev, const char *compat) 123 { 124 return fwnode_device_is_compatible(dev_fwnode(dev), compat); 125 } 126 127 int fwnode_property_match_property_string(const struct fwnode_handle *fwnode, 128 const char *propname, 129 const char * const *array, size_t n); 130 131 static inline 132 int device_property_match_property_string(const struct device *dev, 133 const char *propname, 134 const char * const *array, size_t n) 135 { 136 return fwnode_property_match_property_string(dev_fwnode(dev), propname, array, n); 137 } 138 139 int fwnode_property_get_reference_args(const struct fwnode_handle *fwnode, 140 const char *prop, const char *nargs_prop, 141 unsigned int nargs, unsigned int index, 142 struct fwnode_reference_args *args); 143 144 struct fwnode_handle *fwnode_find_reference(const struct fwnode_handle *fwnode, 145 const char *name, 146 unsigned int index); 147 148 const char *fwnode_get_name(const struct fwnode_handle *fwnode); 149 const char *fwnode_get_name_prefix(const struct fwnode_handle *fwnode); 150 bool fwnode_name_eq(const struct fwnode_handle *fwnode, const char *name); 151 152 struct fwnode_handle *fwnode_get_parent(const struct fwnode_handle *fwnode); 153 struct fwnode_handle *fwnode_get_next_parent(struct fwnode_handle *fwnode); 154 155 #define fwnode_for_each_parent_node(fwnode, parent) \ 156 for (parent = fwnode_get_parent(fwnode); parent; \ 157 parent = fwnode_get_next_parent(parent)) 158 159 unsigned int fwnode_count_parents(const struct fwnode_handle *fwn); 160 struct fwnode_handle *fwnode_get_nth_parent(struct fwnode_handle *fwn, 161 unsigned int depth); 162 struct fwnode_handle *fwnode_get_next_child_node( 163 const struct fwnode_handle *fwnode, struct fwnode_handle *child); 164 struct fwnode_handle *fwnode_get_next_available_child_node( 165 const struct fwnode_handle *fwnode, struct fwnode_handle *child); 166 167 #define fwnode_for_each_child_node(fwnode, child) \ 168 for (child = fwnode_get_next_child_node(fwnode, NULL); child; \ 169 child = fwnode_get_next_child_node(fwnode, child)) 170 171 #define fwnode_for_each_named_child_node(fwnode, child, name) \ 172 fwnode_for_each_child_node(fwnode, child) \ 173 for_each_if(fwnode_name_eq(child, name)) 174 175 #define fwnode_for_each_available_child_node(fwnode, child) \ 176 for (child = fwnode_get_next_available_child_node(fwnode, NULL); child;\ 177 child = fwnode_get_next_available_child_node(fwnode, child)) 178 179 #define fwnode_for_each_child_node_scoped(fwnode, child) \ 180 for (struct fwnode_handle *child __free(fwnode_handle) = \ 181 fwnode_get_next_child_node(fwnode, NULL); \ 182 child; child = fwnode_get_next_child_node(fwnode, child)) 183 184 #define fwnode_for_each_available_child_node_scoped(fwnode, child) \ 185 for (struct fwnode_handle *child __free(fwnode_handle) = \ 186 fwnode_get_next_available_child_node(fwnode, NULL); \ 187 child; child = fwnode_get_next_available_child_node(fwnode, child)) 188 189 struct fwnode_handle *device_get_next_child_node(const struct device *dev, 190 struct fwnode_handle *child); 191 192 #define device_for_each_child_node(dev, child) \ 193 for (child = device_get_next_child_node(dev, NULL); child; \ 194 child = device_get_next_child_node(dev, child)) 195 196 #define device_for_each_named_child_node(dev, child, name) \ 197 device_for_each_child_node(dev, child) \ 198 for_each_if(fwnode_name_eq(child, name)) 199 200 #define device_for_each_child_node_scoped(dev, child) \ 201 for (struct fwnode_handle *child __free(fwnode_handle) = \ 202 device_get_next_child_node(dev, NULL); \ 203 child; child = device_get_next_child_node(dev, child)) 204 205 #define device_for_each_named_child_node_scoped(dev, child, name) \ 206 device_for_each_child_node_scoped(dev, child) \ 207 for_each_if(fwnode_name_eq(child, name)) 208 209 struct fwnode_handle *fwnode_get_named_child_node(const struct fwnode_handle *fwnode, 210 const char *childname); 211 struct fwnode_handle *device_get_named_child_node(const struct device *dev, 212 const char *childname); 213 214 struct fwnode_handle *fwnode_handle_get(struct fwnode_handle *fwnode); 215 216 /** 217 * fwnode_handle_put - Drop reference to a device node 218 * @fwnode: Pointer to the device node to drop the reference to. 219 * 220 * This has to be used when terminating device_for_each_child_node() iteration 221 * with break or return to prevent stale device node references from being left 222 * behind. 223 */ 224 static inline void fwnode_handle_put(struct fwnode_handle *fwnode) 225 { 226 fwnode_call_void_op(fwnode, put); 227 } 228 229 DEFINE_FREE(fwnode_handle, struct fwnode_handle *, fwnode_handle_put(_T)) 230 231 int fwnode_irq_get(const struct fwnode_handle *fwnode, unsigned int index); 232 int fwnode_irq_get_byname(const struct fwnode_handle *fwnode, const char *name); 233 234 unsigned int fwnode_get_child_node_count(const struct fwnode_handle *fwnode); 235 236 static inline unsigned int device_get_child_node_count(const struct device *dev) 237 { 238 return fwnode_get_child_node_count(dev_fwnode(dev)); 239 } 240 241 unsigned int fwnode_get_named_child_node_count(const struct fwnode_handle *fwnode, 242 const char *name); 243 static inline unsigned int device_get_named_child_node_count(const struct device *dev, 244 const char *name) 245 { 246 return fwnode_get_named_child_node_count(dev_fwnode(dev), name); 247 } 248 249 static inline int device_property_read_u8(const struct device *dev, 250 const char *propname, u8 *val) 251 { 252 return device_property_read_u8_array(dev, propname, val, 1); 253 } 254 255 static inline int device_property_read_u16(const struct device *dev, 256 const char *propname, u16 *val) 257 { 258 return device_property_read_u16_array(dev, propname, val, 1); 259 } 260 261 static inline int device_property_read_u32(const struct device *dev, 262 const char *propname, u32 *val) 263 { 264 return device_property_read_u32_array(dev, propname, val, 1); 265 } 266 267 static inline int device_property_read_u64(const struct device *dev, 268 const char *propname, u64 *val) 269 { 270 return device_property_read_u64_array(dev, propname, val, 1); 271 } 272 273 static inline int device_property_count_u8(const struct device *dev, const char *propname) 274 { 275 return device_property_read_u8_array(dev, propname, NULL, 0); 276 } 277 278 static inline int device_property_count_u16(const struct device *dev, const char *propname) 279 { 280 return device_property_read_u16_array(dev, propname, NULL, 0); 281 } 282 283 static inline int device_property_count_u32(const struct device *dev, const char *propname) 284 { 285 return device_property_read_u32_array(dev, propname, NULL, 0); 286 } 287 288 static inline int device_property_count_u64(const struct device *dev, const char *propname) 289 { 290 return device_property_read_u64_array(dev, propname, NULL, 0); 291 } 292 293 static inline int device_property_string_array_count(const struct device *dev, 294 const char *propname) 295 { 296 return device_property_read_string_array(dev, propname, NULL, 0); 297 } 298 299 static inline int fwnode_property_read_u8(const struct fwnode_handle *fwnode, 300 const char *propname, u8 *val) 301 { 302 return fwnode_property_read_u8_array(fwnode, propname, val, 1); 303 } 304 305 static inline int fwnode_property_read_u16(const struct fwnode_handle *fwnode, 306 const char *propname, u16 *val) 307 { 308 return fwnode_property_read_u16_array(fwnode, propname, val, 1); 309 } 310 311 static inline int fwnode_property_read_u32(const struct fwnode_handle *fwnode, 312 const char *propname, u32 *val) 313 { 314 return fwnode_property_read_u32_array(fwnode, propname, val, 1); 315 } 316 317 static inline int fwnode_property_read_u64(const struct fwnode_handle *fwnode, 318 const char *propname, u64 *val) 319 { 320 return fwnode_property_read_u64_array(fwnode, propname, val, 1); 321 } 322 323 static inline int fwnode_property_count_u8(const struct fwnode_handle *fwnode, 324 const char *propname) 325 { 326 return fwnode_property_read_u8_array(fwnode, propname, NULL, 0); 327 } 328 329 static inline int fwnode_property_count_u16(const struct fwnode_handle *fwnode, 330 const char *propname) 331 { 332 return fwnode_property_read_u16_array(fwnode, propname, NULL, 0); 333 } 334 335 static inline int fwnode_property_count_u32(const struct fwnode_handle *fwnode, 336 const char *propname) 337 { 338 return fwnode_property_read_u32_array(fwnode, propname, NULL, 0); 339 } 340 341 static inline int fwnode_property_count_u64(const struct fwnode_handle *fwnode, 342 const char *propname) 343 { 344 return fwnode_property_read_u64_array(fwnode, propname, NULL, 0); 345 } 346 347 static inline int 348 fwnode_property_string_array_count(const struct fwnode_handle *fwnode, 349 const char *propname) 350 { 351 return fwnode_property_read_string_array(fwnode, propname, NULL, 0); 352 } 353 354 struct software_node; 355 356 /** 357 * struct software_node_ref_args - Reference property with additional arguments 358 * @swnode: Reference to a software node 359 * @fwnode: Alternative reference to a firmware node handle 360 * @nargs: Number of elements in @args array 361 * @args: Integer arguments 362 */ 363 struct software_node_ref_args { 364 const struct software_node *swnode; 365 struct fwnode_handle *fwnode; 366 unsigned int nargs; 367 u64 args[NR_FWNODE_REFERENCE_ARGS]; 368 }; 369 370 #define SOFTWARE_NODE_REFERENCE(_ref_, ...) \ 371 (const struct software_node_ref_args) { \ 372 .swnode = _Generic(_ref_, \ 373 const struct software_node *: _ref_, \ 374 struct software_node *: _ref_, \ 375 default: NULL), \ 376 .fwnode = _Generic(_ref_, \ 377 struct fwnode_handle *: _ref_, \ 378 default: NULL), \ 379 .nargs = COUNT_ARGS(__VA_ARGS__), \ 380 .args = { __VA_ARGS__ }, \ 381 } 382 383 /** 384 * struct property_entry - "Built-in" device property representation. 385 * @name: Name of the property. 386 * @length: Length of data making up the value. 387 * @is_inline: True when the property value is stored inline. 388 * @type: Type of the data in unions. 389 * @pointer: Pointer to the property when it is not stored inline. 390 * @value: Value of the property when it is stored inline. 391 */ 392 struct property_entry { 393 const char *name; 394 size_t length; 395 bool is_inline; 396 enum dev_prop_type type; 397 union { 398 const void *pointer; 399 union { 400 u8 u8_data[sizeof(u64) / sizeof(u8)]; 401 u16 u16_data[sizeof(u64) / sizeof(u16)]; 402 u32 u32_data[sizeof(u64) / sizeof(u32)]; 403 u64 u64_data[sizeof(u64) / sizeof(u64)]; 404 const char *str[sizeof(u64) / sizeof(char *)]; 405 } value; 406 }; 407 }; 408 409 /* 410 * Note: the below initializers for the anonymous union are carefully 411 * crafted to avoid gcc-4.4.4's problems with initialization of anon unions 412 * and structs. 413 */ 414 #define __PROPERTY_ENTRY_ARRAY_LEN(_name_, _elem_, _Type_, _val_, _len_) \ 415 (struct property_entry) { \ 416 .name = _name_, \ 417 .length = (_len_) * sizeof_field(struct property_entry, value._elem_[0]), \ 418 .type = DEV_PROP_##_Type_, \ 419 { .pointer = _val_ }, \ 420 } 421 422 #define PROPERTY_ENTRY_U8_ARRAY_LEN(_name_, _val_, _len_) \ 423 __PROPERTY_ENTRY_ARRAY_LEN(_name_, u8_data, U8, _val_, _len_) 424 #define PROPERTY_ENTRY_U16_ARRAY_LEN(_name_, _val_, _len_) \ 425 __PROPERTY_ENTRY_ARRAY_LEN(_name_, u16_data, U16, _val_, _len_) 426 #define PROPERTY_ENTRY_U32_ARRAY_LEN(_name_, _val_, _len_) \ 427 __PROPERTY_ENTRY_ARRAY_LEN(_name_, u32_data, U32, _val_, _len_) 428 #define PROPERTY_ENTRY_U64_ARRAY_LEN(_name_, _val_, _len_) \ 429 __PROPERTY_ENTRY_ARRAY_LEN(_name_, u64_data, U64, _val_, _len_) 430 #define PROPERTY_ENTRY_STRING_ARRAY_LEN(_name_, _val_, _len_) \ 431 __PROPERTY_ENTRY_ARRAY_LEN(_name_, str, STRING, _val_, _len_) 432 433 #define PROPERTY_ENTRY_REF_ARRAY_LEN(_name_, _val_, _len_) \ 434 (struct property_entry) { \ 435 .name = _name_, \ 436 .length = (_len_) * sizeof(struct software_node_ref_args), \ 437 .type = DEV_PROP_REF, \ 438 { .pointer = _val_ }, \ 439 } 440 441 #define PROPERTY_ENTRY_U8_ARRAY(_name_, _val_) \ 442 PROPERTY_ENTRY_U8_ARRAY_LEN(_name_, _val_, ARRAY_SIZE(_val_)) 443 #define PROPERTY_ENTRY_U16_ARRAY(_name_, _val_) \ 444 PROPERTY_ENTRY_U16_ARRAY_LEN(_name_, _val_, ARRAY_SIZE(_val_)) 445 #define PROPERTY_ENTRY_U32_ARRAY(_name_, _val_) \ 446 PROPERTY_ENTRY_U32_ARRAY_LEN(_name_, _val_, ARRAY_SIZE(_val_)) 447 #define PROPERTY_ENTRY_U64_ARRAY(_name_, _val_) \ 448 PROPERTY_ENTRY_U64_ARRAY_LEN(_name_, _val_, ARRAY_SIZE(_val_)) 449 #define PROPERTY_ENTRY_STRING_ARRAY(_name_, _val_) \ 450 PROPERTY_ENTRY_STRING_ARRAY_LEN(_name_, _val_, ARRAY_SIZE(_val_)) 451 #define PROPERTY_ENTRY_REF_ARRAY(_name_, _val_) \ 452 PROPERTY_ENTRY_REF_ARRAY_LEN(_name_, _val_, ARRAY_SIZE(_val_)) 453 454 #define __PROPERTY_ENTRY_ELEMENT(_name_, _elem_, _Type_, _val_) \ 455 (struct property_entry) { \ 456 .name = _name_, \ 457 .length = sizeof_field(struct property_entry, value._elem_[0]), \ 458 .is_inline = true, \ 459 .type = DEV_PROP_##_Type_, \ 460 { .value = { ._elem_[0] = _val_ } }, \ 461 } 462 463 #define PROPERTY_ENTRY_U8(_name_, _val_) \ 464 __PROPERTY_ENTRY_ELEMENT(_name_, u8_data, U8, _val_) 465 #define PROPERTY_ENTRY_U16(_name_, _val_) \ 466 __PROPERTY_ENTRY_ELEMENT(_name_, u16_data, U16, _val_) 467 #define PROPERTY_ENTRY_U32(_name_, _val_) \ 468 __PROPERTY_ENTRY_ELEMENT(_name_, u32_data, U32, _val_) 469 #define PROPERTY_ENTRY_U64(_name_, _val_) \ 470 __PROPERTY_ENTRY_ELEMENT(_name_, u64_data, U64, _val_) 471 #define PROPERTY_ENTRY_STRING(_name_, _val_) \ 472 __PROPERTY_ENTRY_ELEMENT(_name_, str, STRING, _val_) 473 474 #define __PROPERTY_ENTRY_REF_ARGS(_ref_, ...) \ 475 _Generic(_ref_, \ 476 const struct software_node_ref_args *: _ref_, \ 477 struct software_node_ref_args *: _ref_, \ 478 default: &SOFTWARE_NODE_REFERENCE(_ref_, ##__VA_ARGS__)) 479 480 #define PROPERTY_ENTRY_REF(_name_, _ref_, ...) \ 481 (struct property_entry) { \ 482 .name = _name_, \ 483 .length = sizeof(struct software_node_ref_args), \ 484 .type = DEV_PROP_REF, \ 485 { .pointer = __PROPERTY_ENTRY_REF_ARGS(_ref_, ##__VA_ARGS__) }, \ 486 } 487 488 #define PROPERTY_ENTRY_BOOL(_name_) \ 489 (struct property_entry) { \ 490 .name = _name_, \ 491 .is_inline = true, \ 492 } 493 494 struct property_entry * 495 property_entries_dup(const struct property_entry *properties); 496 void property_entries_free(const struct property_entry *properties); 497 498 bool device_dma_supported(const struct device *dev); 499 enum dev_dma_attr device_get_dma_attr(const struct device *dev); 500 501 const void *device_get_match_data(const struct device *dev); 502 503 int device_get_phy_mode(struct device *dev); 504 int fwnode_get_phy_mode(const struct fwnode_handle *fwnode); 505 506 void __iomem *fwnode_iomap(struct fwnode_handle *fwnode, int index); 507 508 struct fwnode_handle *fwnode_graph_get_next_endpoint( 509 const struct fwnode_handle *fwnode, struct fwnode_handle *prev); 510 struct fwnode_handle * 511 fwnode_graph_get_port_parent(const struct fwnode_handle *fwnode); 512 struct fwnode_handle *fwnode_graph_get_remote_port_parent( 513 const struct fwnode_handle *fwnode); 514 struct fwnode_handle *fwnode_graph_get_remote_port( 515 const struct fwnode_handle *fwnode); 516 struct fwnode_handle *fwnode_graph_get_remote_endpoint( 517 const struct fwnode_handle *fwnode); 518 519 static inline bool fwnode_graph_is_endpoint(const struct fwnode_handle *fwnode) 520 { 521 return fwnode_property_present(fwnode, "remote-endpoint"); 522 } 523 524 /* 525 * Fwnode lookup flags 526 * 527 * @FWNODE_GRAPH_ENDPOINT_NEXT: In the case of no exact match, look for the 528 * closest endpoint ID greater than the specified 529 * one. 530 * @FWNODE_GRAPH_DEVICE_DISABLED: That the device to which the remote 531 * endpoint of the given endpoint belongs to, 532 * may be disabled, or that the endpoint is not 533 * connected. 534 */ 535 #define FWNODE_GRAPH_ENDPOINT_NEXT BIT(0) 536 #define FWNODE_GRAPH_DEVICE_DISABLED BIT(1) 537 538 struct fwnode_handle * 539 fwnode_graph_get_endpoint_by_id(const struct fwnode_handle *fwnode, 540 u32 port, u32 endpoint, unsigned long flags); 541 unsigned int fwnode_graph_get_endpoint_count(const struct fwnode_handle *fwnode, 542 unsigned long flags); 543 544 #define fwnode_graph_for_each_endpoint(fwnode, child) \ 545 for (child = fwnode_graph_get_next_endpoint(fwnode, NULL); child; \ 546 child = fwnode_graph_get_next_endpoint(fwnode, child)) 547 548 int fwnode_graph_parse_endpoint(const struct fwnode_handle *fwnode, 549 struct fwnode_endpoint *endpoint); 550 551 typedef void *(*devcon_match_fn_t)(const struct fwnode_handle *fwnode, const char *id, 552 void *data); 553 554 void *fwnode_connection_find_match(const struct fwnode_handle *fwnode, 555 const char *con_id, void *data, 556 devcon_match_fn_t match); 557 558 static inline void *device_connection_find_match(const struct device *dev, 559 const char *con_id, void *data, 560 devcon_match_fn_t match) 561 { 562 return fwnode_connection_find_match(dev_fwnode(dev), con_id, data, match); 563 } 564 565 int fwnode_connection_find_matches(const struct fwnode_handle *fwnode, 566 const char *con_id, void *data, 567 devcon_match_fn_t match, 568 void **matches, unsigned int matches_len); 569 570 /* -------------------------------------------------------------------------- */ 571 /* Software fwnode support - when HW description is incomplete or missing */ 572 573 /** 574 * struct software_node - Software node description 575 * @name: Name of the software node 576 * @parent: Parent of the software node 577 * @properties: Array of device properties 578 */ 579 struct software_node { 580 const char *name; 581 const struct software_node *parent; 582 const struct property_entry *properties; 583 }; 584 585 #define SOFTWARE_NODE(_name_, _properties_, _parent_) \ 586 (struct software_node) { \ 587 .name = _name_, \ 588 .properties = _properties_, \ 589 .parent = _parent_, \ 590 } 591 592 bool is_software_node(const struct fwnode_handle *fwnode); 593 const struct software_node * 594 to_software_node(const struct fwnode_handle *fwnode); 595 struct fwnode_handle *software_node_fwnode(const struct software_node *node); 596 597 const struct software_node * 598 software_node_find_by_name(const struct software_node *parent, 599 const char *name); 600 601 int software_node_register_node_group(const struct software_node * const *node_group); 602 void software_node_unregister_node_group(const struct software_node * const *node_group); 603 604 int software_node_register(const struct software_node *node); 605 void software_node_unregister(const struct software_node *node); 606 607 struct fwnode_handle * 608 fwnode_create_software_node(const struct property_entry *properties, 609 const struct fwnode_handle *parent); 610 void fwnode_remove_software_node(struct fwnode_handle *fwnode); 611 612 int device_add_software_node(struct device *dev, const struct software_node *node); 613 void device_remove_software_node(struct device *dev); 614 615 int device_create_managed_software_node(struct device *dev, 616 const struct property_entry *properties, 617 const struct software_node *parent); 618 619 #endif /* _LINUX_PROPERTY_H_ */ 620