Blame view
drivers/of/property.c
28.7 KB
af6074fc9
|
1 |
// SPDX-License-Identifier: GPL-2.0+ |
1df09bc66
|
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 |
/* * drivers/of/property.c - Procedures for accessing and interpreting * Devicetree properties and graphs. * * Initially created by copying procedures from drivers/of/base.c. This * file contains the OF property as well as the OF graph interface * functions. * * Paul Mackerras August 1996. * Copyright (C) 1996-2005 Paul Mackerras. * * Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner. * {engebret|bergner}@us.ibm.com * * Adapted for sparc and sparc64 by David S. Miller davem@davemloft.net * * Reconsolidated from arch/x/kernel/prom.c by Stephen Rothwell and * Grant Likely. |
1df09bc66
|
20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 |
*/ #define pr_fmt(fmt) "OF: " fmt #include <linux/of.h> #include <linux/of_device.h> #include <linux/of_graph.h> #include <linux/string.h> #include "of_private.h" /** * of_property_count_elems_of_size - Count the number of elements in a property * * @np: device node from which the property value is to be read. * @propname: name of the property to be searched. * @elem_size: size of the individual element * * Search for a property in a device node and count the number of elements of * size elem_size in it. Returns number of elements on sucess, -EINVAL if the * property does not exist or its length does not match a multiple of elem_size * and -ENODATA if the property does not have a value. */ int of_property_count_elems_of_size(const struct device_node *np, const char *propname, int elem_size) { struct property *prop = of_find_property(np, propname, NULL); if (!prop) return -EINVAL; if (!prop->value) return -ENODATA; if (prop->length % elem_size != 0) { |
0d638a07d
|
54 55 56 |
pr_err("size of %s in node %pOF is not a multiple of %d ", propname, np, elem_size); |
1df09bc66
|
57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 |
return -EINVAL; } return prop->length / elem_size; } EXPORT_SYMBOL_GPL(of_property_count_elems_of_size); /** * of_find_property_value_of_size * * @np: device node from which the property value is to be read. * @propname: name of the property to be searched. * @min: minimum allowed length of property value * @max: maximum allowed length of property value (0 means unlimited) * @len: if !=NULL, actual length is written to here * * Search for a property in a device node and valid the requested size. * Returns the property value on success, -EINVAL if the property does not * exist, -ENODATA if property does not have a value, and -EOVERFLOW if the * property data is too small or too large. * */ static void *of_find_property_value_of_size(const struct device_node *np, const char *propname, u32 min, u32 max, size_t *len) { struct property *prop = of_find_property(np, propname, NULL); if (!prop) return ERR_PTR(-EINVAL); if (!prop->value) return ERR_PTR(-ENODATA); if (prop->length < min) return ERR_PTR(-EOVERFLOW); if (max && prop->length > max) return ERR_PTR(-EOVERFLOW); if (len) *len = prop->length; return prop->value; } /** * of_property_read_u32_index - Find and read a u32 from a multi-value property. * * @np: device node from which the property value is to be read. * @propname: name of the property to be searched. * @index: index of the u32 in the list of values * @out_value: pointer to return value, modified only if no error. * * Search for a property in a device node and read nth 32-bit value from * it. Returns 0 on success, -EINVAL if the property does not exist, * -ENODATA if property does not have a value, and -EOVERFLOW if the * property data isn't large enough. * * The out_value is modified only if a valid u32 value can be decoded. */ int of_property_read_u32_index(const struct device_node *np, const char *propname, u32 index, u32 *out_value) { const u32 *val = of_find_property_value_of_size(np, propname, ((index + 1) * sizeof(*out_value)), 0, NULL); if (IS_ERR(val)) return PTR_ERR(val); *out_value = be32_to_cpup(((__be32 *)val) + index); return 0; } EXPORT_SYMBOL_GPL(of_property_read_u32_index); /** * of_property_read_u64_index - Find and read a u64 from a multi-value property. * * @np: device node from which the property value is to be read. * @propname: name of the property to be searched. * @index: index of the u64 in the list of values * @out_value: pointer to return value, modified only if no error. * * Search for a property in a device node and read nth 64-bit value from * it. Returns 0 on success, -EINVAL if the property does not exist, * -ENODATA if property does not have a value, and -EOVERFLOW if the * property data isn't large enough. * * The out_value is modified only if a valid u64 value can be decoded. */ int of_property_read_u64_index(const struct device_node *np, const char *propname, u32 index, u64 *out_value) { const u64 *val = of_find_property_value_of_size(np, propname, ((index + 1) * sizeof(*out_value)), 0, NULL); if (IS_ERR(val)) return PTR_ERR(val); *out_value = be64_to_cpup(((__be64 *)val) + index); return 0; } EXPORT_SYMBOL_GPL(of_property_read_u64_index); /** * of_property_read_variable_u8_array - Find and read an array of u8 from a * property, with bounds on the minimum and maximum array size. * * @np: device node from which the property value is to be read. * @propname: name of the property to be searched. * @out_values: pointer to return value, modified only if return value is 0. * @sz_min: minimum number of array elements to read * @sz_max: maximum number of array elements to read, if zero there is no * upper limit on the number of elements in the dts entry but only * sz_min will be read. * * Search for a property in a device node and read 8-bit value(s) from * it. Returns number of elements read on success, -EINVAL if the property * does not exist, -ENODATA if property does not have a value, and -EOVERFLOW * if the property data is smaller than sz_min or longer than sz_max. * * dts entry of array should be like: * property = /bits/ 8 <0x50 0x60 0x70>; * * The out_values is modified only if a valid u8 value can be decoded. */ int of_property_read_variable_u8_array(const struct device_node *np, const char *propname, u8 *out_values, size_t sz_min, size_t sz_max) { size_t sz, count; const u8 *val = of_find_property_value_of_size(np, propname, (sz_min * sizeof(*out_values)), (sz_max * sizeof(*out_values)), &sz); if (IS_ERR(val)) return PTR_ERR(val); if (!sz_max) sz = sz_min; else sz /= sizeof(*out_values); count = sz; while (count--) *out_values++ = *val++; return sz; } EXPORT_SYMBOL_GPL(of_property_read_variable_u8_array); /** * of_property_read_variable_u16_array - Find and read an array of u16 from a * property, with bounds on the minimum and maximum array size. * * @np: device node from which the property value is to be read. * @propname: name of the property to be searched. * @out_values: pointer to return value, modified only if return value is 0. * @sz_min: minimum number of array elements to read * @sz_max: maximum number of array elements to read, if zero there is no * upper limit on the number of elements in the dts entry but only * sz_min will be read. * * Search for a property in a device node and read 16-bit value(s) from * it. Returns number of elements read on success, -EINVAL if the property * does not exist, -ENODATA if property does not have a value, and -EOVERFLOW * if the property data is smaller than sz_min or longer than sz_max. * * dts entry of array should be like: * property = /bits/ 16 <0x5000 0x6000 0x7000>; * * The out_values is modified only if a valid u16 value can be decoded. */ int of_property_read_variable_u16_array(const struct device_node *np, const char *propname, u16 *out_values, size_t sz_min, size_t sz_max) { size_t sz, count; const __be16 *val = of_find_property_value_of_size(np, propname, (sz_min * sizeof(*out_values)), (sz_max * sizeof(*out_values)), &sz); if (IS_ERR(val)) return PTR_ERR(val); if (!sz_max) sz = sz_min; else sz /= sizeof(*out_values); count = sz; while (count--) *out_values++ = be16_to_cpup(val++); return sz; } EXPORT_SYMBOL_GPL(of_property_read_variable_u16_array); /** * of_property_read_variable_u32_array - Find and read an array of 32 bit * integers from a property, with bounds on the minimum and maximum array size. * * @np: device node from which the property value is to be read. * @propname: name of the property to be searched. * @out_values: pointer to return value, modified only if return value is 0. * @sz_min: minimum number of array elements to read * @sz_max: maximum number of array elements to read, if zero there is no * upper limit on the number of elements in the dts entry but only * sz_min will be read. * * Search for a property in a device node and read 32-bit value(s) from * it. Returns number of elements read on success, -EINVAL if the property * does not exist, -ENODATA if property does not have a value, and -EOVERFLOW * if the property data is smaller than sz_min or longer than sz_max. * * The out_values is modified only if a valid u32 value can be decoded. */ int of_property_read_variable_u32_array(const struct device_node *np, const char *propname, u32 *out_values, size_t sz_min, size_t sz_max) { size_t sz, count; const __be32 *val = of_find_property_value_of_size(np, propname, (sz_min * sizeof(*out_values)), (sz_max * sizeof(*out_values)), &sz); if (IS_ERR(val)) return PTR_ERR(val); if (!sz_max) sz = sz_min; else sz /= sizeof(*out_values); count = sz; while (count--) *out_values++ = be32_to_cpup(val++); return sz; } EXPORT_SYMBOL_GPL(of_property_read_variable_u32_array); /** * of_property_read_u64 - Find and read a 64 bit integer from a property * @np: device node from which the property value is to be read. * @propname: name of the property to be searched. * @out_value: pointer to return value, modified only if return value is 0. * * Search for a property in a device node and read a 64-bit value from * it. Returns 0 on success, -EINVAL if the property does not exist, * -ENODATA if property does not have a value, and -EOVERFLOW if the * property data isn't large enough. * * The out_value is modified only if a valid u64 value can be decoded. */ int of_property_read_u64(const struct device_node *np, const char *propname, u64 *out_value) { const __be32 *val = of_find_property_value_of_size(np, propname, sizeof(*out_value), 0, NULL); if (IS_ERR(val)) return PTR_ERR(val); *out_value = of_read_number(val, 2); return 0; } EXPORT_SYMBOL_GPL(of_property_read_u64); /** * of_property_read_variable_u64_array - Find and read an array of 64 bit * integers from a property, with bounds on the minimum and maximum array size. * * @np: device node from which the property value is to be read. * @propname: name of the property to be searched. * @out_values: pointer to return value, modified only if return value is 0. * @sz_min: minimum number of array elements to read * @sz_max: maximum number of array elements to read, if zero there is no * upper limit on the number of elements in the dts entry but only * sz_min will be read. * * Search for a property in a device node and read 64-bit value(s) from * it. Returns number of elements read on success, -EINVAL if the property * does not exist, -ENODATA if property does not have a value, and -EOVERFLOW * if the property data is smaller than sz_min or longer than sz_max. * * The out_values is modified only if a valid u64 value can be decoded. */ int of_property_read_variable_u64_array(const struct device_node *np, const char *propname, u64 *out_values, size_t sz_min, size_t sz_max) { size_t sz, count; const __be32 *val = of_find_property_value_of_size(np, propname, (sz_min * sizeof(*out_values)), (sz_max * sizeof(*out_values)), &sz); if (IS_ERR(val)) return PTR_ERR(val); if (!sz_max) sz = sz_min; else sz /= sizeof(*out_values); count = sz; while (count--) { *out_values++ = of_read_number(val, 2); val += 2; } return sz; } EXPORT_SYMBOL_GPL(of_property_read_variable_u64_array); /** * of_property_read_string - Find and read a string from a property * @np: device node from which the property value is to be read. * @propname: name of the property to be searched. * @out_string: pointer to null terminated return string, modified only if * return value is 0. * * Search for a property in a device tree node and retrieve a null * terminated string value (pointer to data, not a copy). Returns 0 on * success, -EINVAL if the property does not exist, -ENODATA if property * does not have a value, and -EILSEQ if the string is not null-terminated * within the length of the property data. * * The out_string pointer is modified only if a valid string can be decoded. */ int of_property_read_string(const struct device_node *np, const char *propname, const char **out_string) { const struct property *prop = of_find_property(np, propname, NULL); if (!prop) return -EINVAL; if (!prop->value) return -ENODATA; if (strnlen(prop->value, prop->length) >= prop->length) return -EILSEQ; *out_string = prop->value; return 0; } EXPORT_SYMBOL_GPL(of_property_read_string); /** * of_property_match_string() - Find string in a list and return index * @np: pointer to node containing string list property * @propname: string list property name * @string: pointer to string to search for in string list * * This function searches a string list property and returns the index * of a specific string value. */ int of_property_match_string(const struct device_node *np, const char *propname, const char *string) { const struct property *prop = of_find_property(np, propname, NULL); size_t l; int i; const char *p, *end; if (!prop) return -EINVAL; if (!prop->value) return -ENODATA; p = prop->value; end = p + prop->length; for (i = 0; p < end; i++, p += l) { l = strnlen(p, end - p) + 1; if (p + l > end) return -EILSEQ; pr_debug("comparing %s with %s ", string, p); if (strcmp(string, p) == 0) return i; /* Found it; return index */ } return -ENODATA; } EXPORT_SYMBOL_GPL(of_property_match_string); /** * of_property_read_string_helper() - Utility helper for parsing string properties * @np: device node from which the property value is to be read. * @propname: name of the property to be searched. * @out_strs: output array of string pointers. * @sz: number of array elements to read. * @skip: Number of strings to skip over at beginning of list. * * Don't call this function directly. It is a utility helper for the * of_property_read_string*() family of functions. */ int of_property_read_string_helper(const struct device_node *np, const char *propname, const char **out_strs, size_t sz, int skip) { const struct property *prop = of_find_property(np, propname, NULL); int l = 0, i = 0; const char *p, *end; if (!prop) return -EINVAL; if (!prop->value) return -ENODATA; p = prop->value; end = p + prop->length; for (i = 0; p < end && (!out_strs || i < skip + sz); i++, p += l) { l = strnlen(p, end - p) + 1; if (p + l > end) return -EILSEQ; if (out_strs && i >= skip) *out_strs++ = p; } i -= skip; return i <= 0 ? -ENODATA : i; } EXPORT_SYMBOL_GPL(of_property_read_string_helper); const __be32 *of_prop_next_u32(struct property *prop, const __be32 *cur, u32 *pu) { const void *curv = cur; if (!prop) return NULL; if (!cur) { curv = prop->value; goto out_val; } curv += sizeof(*cur); if (curv >= prop->value + prop->length) return NULL; out_val: *pu = be32_to_cpup(curv); return curv; } EXPORT_SYMBOL_GPL(of_prop_next_u32); const char *of_prop_next_string(struct property *prop, const char *cur) { const void *curv = cur; if (!prop) return NULL; if (!cur) return prop->value; curv += strlen(cur) + 1; if (curv >= prop->value + prop->length) return NULL; return curv; } EXPORT_SYMBOL_GPL(of_prop_next_string); /** * of_graph_parse_endpoint() - parse common endpoint node properties * @node: pointer to endpoint device_node * @endpoint: pointer to the OF endpoint data structure * * The caller should hold a reference to @node. */ int of_graph_parse_endpoint(const struct device_node *node, struct of_endpoint *endpoint) { struct device_node *port_node = of_get_parent(node); |
0d638a07d
|
537 538 539 |
WARN_ONCE(!port_node, "%s(): endpoint %pOF has no parent node ", __func__, node); |
1df09bc66
|
540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 |
memset(endpoint, 0, sizeof(*endpoint)); endpoint->local_node = node; /* * It doesn't matter whether the two calls below succeed. * If they don't then the default value 0 is used. */ of_property_read_u32(port_node, "reg", &endpoint->port); of_property_read_u32(node, "reg", &endpoint->id); of_node_put(port_node); return 0; } EXPORT_SYMBOL(of_graph_parse_endpoint); /** * of_graph_get_port_by_id() - get the port matching a given id * @parent: pointer to the parent device node * @id: id of the port * * Return: A 'port' node pointer with refcount incremented. The caller * has to use of_node_put() on it when done. */ struct device_node *of_graph_get_port_by_id(struct device_node *parent, u32 id) { struct device_node *node, *port; node = of_get_child_by_name(parent, "ports"); if (node) parent = node; for_each_child_of_node(parent, port) { u32 port_id = 0; |
b3e46d1a0
|
575 |
if (!of_node_name_eq(port, "port")) |
1df09bc66
|
576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 |
continue; of_property_read_u32(port, "reg", &port_id); if (id == port_id) break; } of_node_put(node); return port; } EXPORT_SYMBOL(of_graph_get_port_by_id); /** * of_graph_get_next_endpoint() - get next endpoint node * @parent: pointer to the parent device node * @prev: previous endpoint node, or NULL to get first * * Return: An 'endpoint' node pointer with refcount incremented. Refcount * of the passed @prev node is decremented. */ struct device_node *of_graph_get_next_endpoint(const struct device_node *parent, struct device_node *prev) { struct device_node *endpoint; struct device_node *port; if (!parent) return NULL; /* * Start by locating the port node. If no previous endpoint is specified * search for the first port node, otherwise get the previous endpoint * parent port node. */ if (!prev) { struct device_node *node; node = of_get_child_by_name(parent, "ports"); if (node) parent = node; port = of_get_child_by_name(parent, "port"); of_node_put(node); if (!port) { |
0d638a07d
|
621 622 |
pr_err("graph: no port node found in %pOF ", parent); |
1df09bc66
|
623 624 625 626 |
return NULL; } } else { port = of_get_parent(prev); |
0d638a07d
|
627 628 629 |
if (WARN_ONCE(!port, "%s(): endpoint %pOF has no parent node ", __func__, prev)) |
1df09bc66
|
630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 |
return NULL; } while (1) { /* * Now that we have a port node, get the next endpoint by * getting the next child. If the previous endpoint is NULL this * will return the first child. */ endpoint = of_get_next_child(port, prev); if (endpoint) { of_node_put(port); return endpoint; } /* No more endpoints under this port, try the next one. */ prev = NULL; do { port = of_get_next_child(parent, port); if (!port) return NULL; |
b3e46d1a0
|
652 |
} while (!of_node_name_eq(port, "port")); |
1df09bc66
|
653 654 655 656 657 658 659 660 661 662 663 664 |
} } EXPORT_SYMBOL(of_graph_get_next_endpoint); /** * of_graph_get_endpoint_by_regs() - get endpoint node of specific identifiers * @parent: pointer to the parent device node * @port_reg: identifier (value of reg property) of the parent port node * @reg: identifier (value of reg property) of the endpoint node * * Return: An 'endpoint' node pointer which is identified by reg and at the same * is the child of a port node identified by port_reg. reg and port_reg are |
deb387d4a
|
665 |
* ignored when they are -1. Use of_node_put() on the pointer when done. |
1df09bc66
|
666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 |
*/ struct device_node *of_graph_get_endpoint_by_regs( const struct device_node *parent, int port_reg, int reg) { struct of_endpoint endpoint; struct device_node *node = NULL; for_each_endpoint_of_node(parent, node) { of_graph_parse_endpoint(node, &endpoint); if (((port_reg == -1) || (endpoint.port == port_reg)) && ((reg == -1) || (endpoint.id == reg))) return node; } return NULL; } EXPORT_SYMBOL(of_graph_get_endpoint_by_regs); /** |
b8ba92b10
|
685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 |
* of_graph_get_remote_endpoint() - get remote endpoint node * @node: pointer to a local endpoint device_node * * Return: Remote endpoint node associated with remote endpoint node linked * to @node. Use of_node_put() on it when done. */ struct device_node *of_graph_get_remote_endpoint(const struct device_node *node) { /* Get remote endpoint node. */ return of_parse_phandle(node, "remote-endpoint", 0); } EXPORT_SYMBOL(of_graph_get_remote_endpoint); /** * of_graph_get_port_parent() - get port's parent node * @node: pointer to a local endpoint device_node * * Return: device node associated with endpoint node linked * to @node. Use of_node_put() on it when done. */ struct device_node *of_graph_get_port_parent(struct device_node *node) { unsigned int depth; |
c0a480d1a
|
708 709 710 711 712 713 714 715 |
if (!node) return NULL; /* * Preserve usecount for passed in node as of_get_next_parent() * will do of_node_put() on it. */ of_node_get(node); |
b8ba92b10
|
716 717 718 |
/* Walk 3 levels up only if there is 'ports' node. */ for (depth = 3; depth && node; depth--) { node = of_get_next_parent(node); |
b3e46d1a0
|
719 |
if (depth == 2 && !of_node_name_eq(node, "ports")) |
b8ba92b10
|
720 721 722 723 724 725 726 |
break; } return node; } EXPORT_SYMBOL(of_graph_get_port_parent); /** |
1df09bc66
|
727 728 729 730 731 732 733 734 735 |
* of_graph_get_remote_port_parent() - get remote port's parent node * @node: pointer to a local endpoint device_node * * Return: Remote device node associated with remote endpoint node linked * to @node. Use of_node_put() on it when done. */ struct device_node *of_graph_get_remote_port_parent( const struct device_node *node) { |
c0a480d1a
|
736 |
struct device_node *np, *pp; |
1df09bc66
|
737 738 |
/* Get remote endpoint node. */ |
b8ba92b10
|
739 |
np = of_graph_get_remote_endpoint(node); |
1df09bc66
|
740 |
|
c0a480d1a
|
741 742 743 744 745 |
pp = of_graph_get_port_parent(np); of_node_put(np); return pp; |
1df09bc66
|
746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 |
} EXPORT_SYMBOL(of_graph_get_remote_port_parent); /** * of_graph_get_remote_port() - get remote port node * @node: pointer to a local endpoint device_node * * Return: Remote port node associated with remote endpoint node linked * to @node. Use of_node_put() on it when done. */ struct device_node *of_graph_get_remote_port(const struct device_node *node) { struct device_node *np; /* Get remote endpoint node. */ |
b8ba92b10
|
761 |
np = of_graph_get_remote_endpoint(node); |
1df09bc66
|
762 763 764 765 766 |
if (!np) return NULL; return of_get_next_parent(np); } EXPORT_SYMBOL(of_graph_get_remote_port); |
b8ba92b10
|
767 768 769 770 771 772 773 774 775 776 777 |
int of_graph_get_endpoint_count(const struct device_node *np) { struct device_node *endpoint; int num = 0; for_each_endpoint_of_node(np, endpoint) num++; return num; } EXPORT_SYMBOL(of_graph_get_endpoint_count); |
1df09bc66
|
778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 |
/** * of_graph_get_remote_node() - get remote parent device_node for given port/endpoint * @node: pointer to parent device_node containing graph port/endpoint * @port: identifier (value of reg property) of the parent port node * @endpoint: identifier (value of reg property) of the endpoint node * * Return: Remote device node associated with remote endpoint node linked * to @node. Use of_node_put() on it when done. */ struct device_node *of_graph_get_remote_node(const struct device_node *node, u32 port, u32 endpoint) { struct device_node *endpoint_node, *remote; endpoint_node = of_graph_get_endpoint_by_regs(node, port, endpoint); if (!endpoint_node) { |
0d638a07d
|
794 795 796 |
pr_debug("no valid endpoint (%d, %d) for node %pOF ", port, endpoint, node); |
1df09bc66
|
797 798 799 800 801 802 803 804 805 806 807 808 809 810 |
return NULL; } remote = of_graph_get_remote_port_parent(endpoint_node); of_node_put(endpoint_node); if (!remote) { pr_debug("no valid remote node "); return NULL; } if (!of_device_is_available(remote)) { pr_debug("not available for remote node "); |
28b170e88
|
811 |
of_node_put(remote); |
1df09bc66
|
812 813 814 815 816 817 |
return NULL; } return remote; } EXPORT_SYMBOL(of_graph_get_remote_node); |
3708184af
|
818 |
|
cf89a31ca
|
819 |
static struct fwnode_handle *of_fwnode_get(struct fwnode_handle *fwnode) |
3708184af
|
820 |
{ |
cf89a31ca
|
821 |
return of_fwnode_handle(of_node_get(to_of_node(fwnode))); |
3708184af
|
822 823 824 825 826 827 |
} static void of_fwnode_put(struct fwnode_handle *fwnode) { of_node_put(to_of_node(fwnode)); } |
37ba983cf
|
828 |
static bool of_fwnode_device_is_available(const struct fwnode_handle *fwnode) |
2294b3af0
|
829 830 831 |
{ return of_device_is_available(to_of_node(fwnode)); } |
37ba983cf
|
832 |
static bool of_fwnode_property_present(const struct fwnode_handle *fwnode, |
3708184af
|
833 834 835 836 |
const char *propname) { return of_property_read_bool(to_of_node(fwnode), propname); } |
37ba983cf
|
837 |
static int of_fwnode_property_read_int_array(const struct fwnode_handle *fwnode, |
3708184af
|
838 839 840 841 |
const char *propname, unsigned int elem_size, void *val, size_t nval) { |
37ba983cf
|
842 |
const struct device_node *node = to_of_node(fwnode); |
3708184af
|
843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 |
if (!val) return of_property_count_elems_of_size(node, propname, elem_size); switch (elem_size) { case sizeof(u8): return of_property_read_u8_array(node, propname, val, nval); case sizeof(u16): return of_property_read_u16_array(node, propname, val, nval); case sizeof(u32): return of_property_read_u32_array(node, propname, val, nval); case sizeof(u64): return of_property_read_u64_array(node, propname, val, nval); } return -ENXIO; } |
37ba983cf
|
861 862 863 864 |
static int of_fwnode_property_read_string_array(const struct fwnode_handle *fwnode, const char *propname, const char **val, size_t nval) |
3708184af
|
865 |
{ |
37ba983cf
|
866 |
const struct device_node *node = to_of_node(fwnode); |
3708184af
|
867 868 869 870 871 |
return val ? of_property_read_string_array(node, propname, val, nval) : of_property_count_strings(node, propname); } |
37ba983cf
|
872 873 |
static struct fwnode_handle * of_fwnode_get_parent(const struct fwnode_handle *fwnode) |
3708184af
|
874 875 876 877 878 |
{ return of_fwnode_handle(of_get_parent(to_of_node(fwnode))); } static struct fwnode_handle * |
37ba983cf
|
879 |
of_fwnode_get_next_child_node(const struct fwnode_handle *fwnode, |
3708184af
|
880 881 882 883 884 885 886 |
struct fwnode_handle *child) { return of_fwnode_handle(of_get_next_available_child(to_of_node(fwnode), to_of_node(child))); } static struct fwnode_handle * |
37ba983cf
|
887 |
of_fwnode_get_named_child_node(const struct fwnode_handle *fwnode, |
3708184af
|
888 889 |
const char *childname) { |
37ba983cf
|
890 |
const struct device_node *node = to_of_node(fwnode); |
3708184af
|
891 892 893 |
struct device_node *child; for_each_available_child_of_node(node, child) |
b3e46d1a0
|
894 |
if (of_node_name_eq(child, childname)) |
3708184af
|
895 896 897 898 |
return of_fwnode_handle(child); return NULL; } |
3e3119d30
|
899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 |
static int of_fwnode_get_reference_args(const struct fwnode_handle *fwnode, const char *prop, const char *nargs_prop, unsigned int nargs, unsigned int index, struct fwnode_reference_args *args) { struct of_phandle_args of_args; unsigned int i; int ret; if (nargs_prop) ret = of_parse_phandle_with_args(to_of_node(fwnode), prop, nargs_prop, index, &of_args); else ret = of_parse_phandle_with_fixed_args(to_of_node(fwnode), prop, nargs, index, &of_args); if (ret < 0) return ret; if (!args) return 0; args->nargs = of_args.args_count; args->fwnode = of_fwnode_handle(of_args.np); for (i = 0; i < NR_FWNODE_REFERENCE_ARGS; i++) args->args[i] = i < of_args.args_count ? of_args.args[i] : 0; return 0; } |
3b27d00e7
|
928 |
static struct fwnode_handle * |
37ba983cf
|
929 |
of_fwnode_graph_get_next_endpoint(const struct fwnode_handle *fwnode, |
3b27d00e7
|
930 931 932 933 934 935 936 |
struct fwnode_handle *prev) { return of_fwnode_handle(of_graph_get_next_endpoint(to_of_node(fwnode), to_of_node(prev))); } static struct fwnode_handle * |
37ba983cf
|
937 |
of_fwnode_graph_get_remote_endpoint(const struct fwnode_handle *fwnode) |
3b27d00e7
|
938 |
{ |
358155ede
|
939 940 |
return of_fwnode_handle( of_graph_get_remote_endpoint(to_of_node(fwnode))); |
3b27d00e7
|
941 942 943 944 945 946 947 948 |
} static struct fwnode_handle * of_fwnode_graph_get_port_parent(struct fwnode_handle *fwnode) { struct device_node *np; /* Get the parent of the port */ |
3314c6bdd
|
949 |
np = of_get_parent(to_of_node(fwnode)); |
3b27d00e7
|
950 951 952 953 |
if (!np) return NULL; /* Is this the "ports" node? If not, it's the port parent. */ |
b3e46d1a0
|
954 |
if (!of_node_name_eq(np, "ports")) |
3b27d00e7
|
955 956 957 958 |
return of_fwnode_handle(np); return of_fwnode_handle(of_get_next_parent(np)); } |
37ba983cf
|
959 |
static int of_fwnode_graph_parse_endpoint(const struct fwnode_handle *fwnode, |
3b27d00e7
|
960 961 |
struct fwnode_endpoint *endpoint) { |
37ba983cf
|
962 |
const struct device_node *node = to_of_node(fwnode); |
3b27d00e7
|
963 964 965 966 967 968 969 970 971 972 973 |
struct device_node *port_node = of_get_parent(node); endpoint->local_fwnode = fwnode; of_property_read_u32(port_node, "reg", &endpoint->port); of_property_read_u32(node, "reg", &endpoint->id); of_node_put(port_node); return 0; } |
67dcc26d2
|
974 |
static const void * |
1c2c82ea2
|
975 976 977 |
of_fwnode_device_get_match_data(const struct fwnode_handle *fwnode, const struct device *dev) { |
67dcc26d2
|
978 |
return of_device_get_match_data(dev); |
1c2c82ea2
|
979 |
} |
3708184af
|
980 981 982 |
const struct fwnode_operations of_fwnode_ops = { .get = of_fwnode_get, .put = of_fwnode_put, |
2294b3af0
|
983 |
.device_is_available = of_fwnode_device_is_available, |
1c2c82ea2
|
984 |
.device_get_match_data = of_fwnode_device_get_match_data, |
3708184af
|
985 986 987 988 989 990 |
.property_present = of_fwnode_property_present, .property_read_int_array = of_fwnode_property_read_int_array, .property_read_string_array = of_fwnode_property_read_string_array, .get_parent = of_fwnode_get_parent, .get_next_child_node = of_fwnode_get_next_child_node, .get_named_child_node = of_fwnode_get_named_child_node, |
3e3119d30
|
991 |
.get_reference_args = of_fwnode_get_reference_args, |
3b27d00e7
|
992 993 994 995 |
.graph_get_next_endpoint = of_fwnode_graph_get_next_endpoint, .graph_get_remote_endpoint = of_fwnode_graph_get_remote_endpoint, .graph_get_port_parent = of_fwnode_graph_get_port_parent, .graph_parse_endpoint = of_fwnode_graph_parse_endpoint, |
3708184af
|
996 |
}; |
db3e50f32
|
997 |
EXPORT_SYMBOL_GPL(of_fwnode_ops); |