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