1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (c) 2017 Google, Inc 4 * Written by Simon Glass <sjg@chromium.org> 5 */ 6 7 #include <common.h> 8 #include <dm.h> 9 #include <fdtdec.h> 10 #include <fdt_support.h> 11 #include <linux/libfdt.h> 12 #include <dm/of_access.h> 13 #include <dm/of_addr.h> 14 #include <dm/ofnode.h> 15 #include <linux/err.h> 16 #include <linux/ioport.h> 17 18 int ofnode_read_u32(ofnode node, const char *propname, u32 *outp) 19 { 20 assert(ofnode_valid(node)); 21 debug("%s: %s: ", __func__, propname); 22 23 if (ofnode_is_np(node)) { 24 return of_read_u32(ofnode_to_np(node), propname, outp); 25 } else { 26 const fdt32_t *cell; 27 int len; 28 29 cell = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), 30 propname, &len); 31 if (!cell || len < sizeof(int)) { 32 debug("(not found)\n"); 33 return -EINVAL; 34 } 35 *outp = fdt32_to_cpu(cell[0]); 36 } 37 debug("%#x (%d)\n", *outp, *outp); 38 39 return 0; 40 } 41 42 int ofnode_read_u32_default(ofnode node, const char *propname, u32 def) 43 { 44 assert(ofnode_valid(node)); 45 ofnode_read_u32(node, propname, &def); 46 47 return def; 48 } 49 50 int ofnode_read_s32_default(ofnode node, const char *propname, s32 def) 51 { 52 assert(ofnode_valid(node)); 53 ofnode_read_u32(node, propname, (u32 *)&def); 54 55 return def; 56 } 57 58 int ofnode_read_u64(ofnode node, const char *propname, u64 *outp) 59 { 60 const fdt64_t *cell; 61 int len; 62 63 assert(ofnode_valid(node)); 64 debug("%s: %s: ", __func__, propname); 65 66 if (ofnode_is_np(node)) 67 return of_read_u64(ofnode_to_np(node), propname, outp); 68 69 cell = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), propname, 70 &len); 71 if (!cell || len < sizeof(*cell)) { 72 debug("(not found)\n"); 73 return -EINVAL; 74 } 75 *outp = fdt64_to_cpu(cell[0]); 76 debug("%#llx (%lld)\n", (unsigned long long)*outp, 77 (unsigned long long)*outp); 78 79 return 0; 80 } 81 82 int ofnode_read_u64_default(ofnode node, const char *propname, u64 def) 83 { 84 assert(ofnode_valid(node)); 85 ofnode_read_u64(node, propname, &def); 86 87 return def; 88 } 89 90 bool ofnode_read_bool(ofnode node, const char *propname) 91 { 92 const void *prop; 93 94 assert(ofnode_valid(node)); 95 debug("%s: %s: ", __func__, propname); 96 97 prop = ofnode_get_property(node, propname, NULL); 98 99 debug("%s\n", prop ? "true" : "false"); 100 101 return prop ? true : false; 102 } 103 104 const char *ofnode_read_string(ofnode node, const char *propname) 105 { 106 const char *str = NULL; 107 int len = -1; 108 109 assert(ofnode_valid(node)); 110 debug("%s: %s: ", __func__, propname); 111 112 if (ofnode_is_np(node)) { 113 struct property *prop = of_find_property( 114 ofnode_to_np(node), propname, NULL); 115 116 if (prop) { 117 str = prop->value; 118 len = prop->length; 119 } 120 } else { 121 str = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), 122 propname, &len); 123 } 124 if (!str) { 125 debug("<not found>\n"); 126 return NULL; 127 } 128 if (strnlen(str, len) >= len) { 129 debug("<invalid>\n"); 130 return NULL; 131 } 132 debug("%s\n", str); 133 134 return str; 135 } 136 137 ofnode ofnode_find_subnode(ofnode node, const char *subnode_name) 138 { 139 ofnode subnode; 140 141 assert(ofnode_valid(node)); 142 debug("%s: %s: ", __func__, subnode_name); 143 144 if (ofnode_is_np(node)) { 145 const struct device_node *np = ofnode_to_np(node); 146 147 for (np = np->child; np; np = np->sibling) { 148 if (!strcmp(subnode_name, np->name)) 149 break; 150 } 151 subnode = np_to_ofnode(np); 152 } else { 153 int ooffset = fdt_subnode_offset(gd->fdt_blob, 154 ofnode_to_offset(node), subnode_name); 155 subnode = offset_to_ofnode(ooffset); 156 } 157 debug("%s\n", ofnode_valid(subnode) ? 158 ofnode_get_name(subnode) : "<none>"); 159 160 return subnode; 161 } 162 163 int ofnode_read_u32_array(ofnode node, const char *propname, 164 u32 *out_values, size_t sz) 165 { 166 assert(ofnode_valid(node)); 167 debug("%s: %s: ", __func__, propname); 168 169 if (ofnode_is_np(node)) { 170 return of_read_u32_array(ofnode_to_np(node), propname, 171 out_values, sz); 172 } else { 173 return fdtdec_get_int_array(gd->fdt_blob, 174 ofnode_to_offset(node), propname, 175 out_values, sz); 176 } 177 } 178 179 ofnode ofnode_first_subnode(ofnode node) 180 { 181 assert(ofnode_valid(node)); 182 if (ofnode_is_np(node)) 183 return np_to_ofnode(node.np->child); 184 185 return offset_to_ofnode( 186 fdt_first_subnode(gd->fdt_blob, ofnode_to_offset(node))); 187 } 188 189 ofnode ofnode_next_subnode(ofnode node) 190 { 191 assert(ofnode_valid(node)); 192 if (ofnode_is_np(node)) 193 return np_to_ofnode(node.np->sibling); 194 195 return offset_to_ofnode( 196 fdt_next_subnode(gd->fdt_blob, ofnode_to_offset(node))); 197 } 198 199 ofnode ofnode_get_parent(ofnode node) 200 { 201 ofnode parent; 202 203 assert(ofnode_valid(node)); 204 if (ofnode_is_np(node)) 205 parent = np_to_ofnode(of_get_parent(ofnode_to_np(node))); 206 else 207 parent.of_offset = fdt_parent_offset(gd->fdt_blob, 208 ofnode_to_offset(node)); 209 210 return parent; 211 } 212 213 const char *ofnode_get_name(ofnode node) 214 { 215 assert(ofnode_valid(node)); 216 if (ofnode_is_np(node)) 217 return strrchr(node.np->full_name, '/') + 1; 218 219 return fdt_get_name(gd->fdt_blob, ofnode_to_offset(node), NULL); 220 } 221 222 ofnode ofnode_get_by_phandle(uint phandle) 223 { 224 ofnode node; 225 226 if (of_live_active()) 227 node = np_to_ofnode(of_find_node_by_phandle(phandle)); 228 else 229 node.of_offset = fdt_node_offset_by_phandle(gd->fdt_blob, 230 phandle); 231 232 return node; 233 } 234 235 int ofnode_read_size(ofnode node, const char *propname) 236 { 237 int len; 238 239 if (ofnode_is_np(node)) { 240 struct property *prop = of_find_property( 241 ofnode_to_np(node), propname, NULL); 242 243 if (prop) 244 return prop->length; 245 } else { 246 if (fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), propname, 247 &len)) 248 return len; 249 } 250 251 return -EINVAL; 252 } 253 254 fdt_addr_t ofnode_get_addr_index(ofnode node, int index) 255 { 256 int na, ns; 257 fdt_size_t size; 258 259 if (ofnode_is_np(node)) { 260 const __be32 *prop_val; 261 uint flags; 262 263 prop_val = of_get_address(ofnode_to_np(node), index, 264 (u64 *)&size, &flags); 265 if (!prop_val) 266 return FDT_ADDR_T_NONE; 267 268 ns = of_n_size_cells(ofnode_to_np(node)); 269 270 if (IS_ENABLED(CONFIG_OF_TRANSLATE) && ns > 0) { 271 return of_translate_address(ofnode_to_np(node), prop_val); 272 } else { 273 na = of_n_addr_cells(ofnode_to_np(node)); 274 return of_read_number(prop_val, na); 275 } 276 } else { 277 na = ofnode_read_simple_addr_cells(ofnode_get_parent(node)); 278 ns = ofnode_read_simple_size_cells(ofnode_get_parent(node)); 279 return fdtdec_get_addr_size_fixed(gd->fdt_blob, 280 ofnode_to_offset(node), "reg", 281 index, na, ns, &size, true); 282 } 283 284 return FDT_ADDR_T_NONE; 285 } 286 287 fdt_addr_t ofnode_get_addr(ofnode node) 288 { 289 return ofnode_get_addr_index(node, 0); 290 } 291 292 int ofnode_stringlist_search(ofnode node, const char *property, 293 const char *string) 294 { 295 if (ofnode_is_np(node)) { 296 return of_property_match_string(ofnode_to_np(node), 297 property, string); 298 } else { 299 int ret; 300 301 ret = fdt_stringlist_search(gd->fdt_blob, 302 ofnode_to_offset(node), property, 303 string); 304 if (ret == -FDT_ERR_NOTFOUND) 305 return -ENODATA; 306 else if (ret < 0) 307 return -EINVAL; 308 309 return ret; 310 } 311 } 312 313 int ofnode_read_string_index(ofnode node, const char *property, int index, 314 const char **outp) 315 { 316 if (ofnode_is_np(node)) { 317 return of_property_read_string_index(ofnode_to_np(node), 318 property, index, outp); 319 } else { 320 int len; 321 322 *outp = fdt_stringlist_get(gd->fdt_blob, ofnode_to_offset(node), 323 property, index, &len); 324 if (len < 0) 325 return -EINVAL; 326 return 0; 327 } 328 } 329 330 int ofnode_read_string_count(ofnode node, const char *property) 331 { 332 if (ofnode_is_np(node)) { 333 return of_property_count_strings(ofnode_to_np(node), property); 334 } else { 335 return fdt_stringlist_count(gd->fdt_blob, 336 ofnode_to_offset(node), property); 337 } 338 } 339 340 static void ofnode_from_fdtdec_phandle_args(struct fdtdec_phandle_args *in, 341 struct ofnode_phandle_args *out) 342 { 343 assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS); 344 out->node = offset_to_ofnode(in->node); 345 out->args_count = in->args_count; 346 memcpy(out->args, in->args, sizeof(out->args)); 347 } 348 349 static void ofnode_from_of_phandle_args(struct of_phandle_args *in, 350 struct ofnode_phandle_args *out) 351 { 352 assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS); 353 out->node = np_to_ofnode(in->np); 354 out->args_count = in->args_count; 355 memcpy(out->args, in->args, sizeof(out->args)); 356 } 357 358 int ofnode_parse_phandle_with_args(ofnode node, const char *list_name, 359 const char *cells_name, int cell_count, 360 int index, 361 struct ofnode_phandle_args *out_args) 362 { 363 if (ofnode_is_np(node)) { 364 struct of_phandle_args args; 365 int ret; 366 367 ret = of_parse_phandle_with_args(ofnode_to_np(node), 368 list_name, cells_name, index, 369 &args); 370 if (ret) 371 return ret; 372 ofnode_from_of_phandle_args(&args, out_args); 373 } else { 374 struct fdtdec_phandle_args args; 375 int ret; 376 377 ret = fdtdec_parse_phandle_with_args(gd->fdt_blob, 378 ofnode_to_offset(node), 379 list_name, cells_name, 380 cell_count, index, &args); 381 if (ret) 382 return ret; 383 ofnode_from_fdtdec_phandle_args(&args, out_args); 384 } 385 386 return 0; 387 } 388 389 int ofnode_count_phandle_with_args(ofnode node, const char *list_name, 390 const char *cells_name) 391 { 392 if (ofnode_is_np(node)) 393 return of_count_phandle_with_args(ofnode_to_np(node), 394 list_name, cells_name); 395 else 396 return fdtdec_parse_phandle_with_args(gd->fdt_blob, 397 ofnode_to_offset(node), list_name, cells_name, 398 0, -1, NULL); 399 } 400 401 ofnode ofnode_path(const char *path) 402 { 403 if (of_live_active()) 404 return np_to_ofnode(of_find_node_by_path(path)); 405 else 406 return offset_to_ofnode(fdt_path_offset(gd->fdt_blob, path)); 407 } 408 409 const char *ofnode_get_chosen_prop(const char *name) 410 { 411 ofnode chosen_node; 412 413 chosen_node = ofnode_path("/chosen"); 414 415 return ofnode_read_string(chosen_node, name); 416 } 417 418 ofnode ofnode_get_chosen_node(const char *name) 419 { 420 const char *prop; 421 422 prop = ofnode_get_chosen_prop(name); 423 if (!prop) 424 return ofnode_null(); 425 426 return ofnode_path(prop); 427 } 428 429 static int decode_timing_property(ofnode node, const char *name, 430 struct timing_entry *result) 431 { 432 int length, ret = 0; 433 434 length = ofnode_read_size(node, name); 435 if (length < 0) { 436 debug("%s: could not find property %s\n", 437 ofnode_get_name(node), name); 438 return length; 439 } 440 441 if (length == sizeof(u32)) { 442 result->typ = ofnode_read_u32_default(node, name, 0); 443 result->min = result->typ; 444 result->max = result->typ; 445 } else { 446 ret = ofnode_read_u32_array(node, name, &result->min, 3); 447 } 448 449 return ret; 450 } 451 452 int ofnode_decode_display_timing(ofnode parent, int index, 453 struct display_timing *dt) 454 { 455 int i; 456 ofnode timings, node; 457 u32 val = 0; 458 int ret = 0; 459 460 timings = ofnode_find_subnode(parent, "display-timings"); 461 if (!ofnode_valid(timings)) 462 return -EINVAL; 463 464 i = 0; 465 ofnode_for_each_subnode(node, timings) { 466 if (i++ == index) 467 break; 468 } 469 470 if (!ofnode_valid(node)) 471 return -EINVAL; 472 473 memset(dt, 0, sizeof(*dt)); 474 475 ret |= decode_timing_property(node, "hback-porch", &dt->hback_porch); 476 ret |= decode_timing_property(node, "hfront-porch", &dt->hfront_porch); 477 ret |= decode_timing_property(node, "hactive", &dt->hactive); 478 ret |= decode_timing_property(node, "hsync-len", &dt->hsync_len); 479 ret |= decode_timing_property(node, "vback-porch", &dt->vback_porch); 480 ret |= decode_timing_property(node, "vfront-porch", &dt->vfront_porch); 481 ret |= decode_timing_property(node, "vactive", &dt->vactive); 482 ret |= decode_timing_property(node, "vsync-len", &dt->vsync_len); 483 ret |= decode_timing_property(node, "clock-frequency", &dt->pixelclock); 484 485 dt->flags = 0; 486 val = ofnode_read_u32_default(node, "vsync-active", -1); 487 if (val != -1) { 488 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH : 489 DISPLAY_FLAGS_VSYNC_LOW; 490 } 491 val = ofnode_read_u32_default(node, "hsync-active", -1); 492 if (val != -1) { 493 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH : 494 DISPLAY_FLAGS_HSYNC_LOW; 495 } 496 val = ofnode_read_u32_default(node, "de-active", -1); 497 if (val != -1) { 498 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH : 499 DISPLAY_FLAGS_DE_LOW; 500 } 501 val = ofnode_read_u32_default(node, "pixelclk-active", -1); 502 if (val != -1) { 503 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE : 504 DISPLAY_FLAGS_PIXDATA_NEGEDGE; 505 } 506 507 if (ofnode_read_bool(node, "interlaced")) 508 dt->flags |= DISPLAY_FLAGS_INTERLACED; 509 if (ofnode_read_bool(node, "doublescan")) 510 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN; 511 if (ofnode_read_bool(node, "doubleclk")) 512 dt->flags |= DISPLAY_FLAGS_DOUBLECLK; 513 514 return ret; 515 } 516 517 const void *ofnode_get_property(ofnode node, const char *propname, int *lenp) 518 { 519 if (ofnode_is_np(node)) 520 return of_get_property(ofnode_to_np(node), propname, lenp); 521 else 522 return fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), 523 propname, lenp); 524 } 525 526 bool ofnode_is_available(ofnode node) 527 { 528 if (ofnode_is_np(node)) 529 return of_device_is_available(ofnode_to_np(node)); 530 else 531 return fdtdec_get_is_enabled(gd->fdt_blob, 532 ofnode_to_offset(node)); 533 } 534 535 fdt_addr_t ofnode_get_addr_size(ofnode node, const char *property, 536 fdt_size_t *sizep) 537 { 538 if (ofnode_is_np(node)) { 539 int na, ns; 540 int psize; 541 const struct device_node *np = ofnode_to_np(node); 542 const __be32 *prop = of_get_property(np, property, &psize); 543 544 if (!prop) 545 return FDT_ADDR_T_NONE; 546 na = of_n_addr_cells(np); 547 ns = of_n_size_cells(np); 548 *sizep = of_read_number(prop + na, ns); 549 550 if (IS_ENABLED(CONFIG_OF_TRANSLATE) && ns > 0) 551 return of_translate_address(np, prop); 552 else 553 return of_read_number(prop, na); 554 } else { 555 return fdtdec_get_addr_size(gd->fdt_blob, 556 ofnode_to_offset(node), property, 557 sizep); 558 } 559 } 560 561 const uint8_t *ofnode_read_u8_array_ptr(ofnode node, const char *propname, 562 size_t sz) 563 { 564 if (ofnode_is_np(node)) { 565 const struct device_node *np = ofnode_to_np(node); 566 int psize; 567 const __be32 *prop = of_get_property(np, propname, &psize); 568 569 if (!prop || sz != psize) 570 return NULL; 571 return (uint8_t *)prop; 572 573 } else { 574 return fdtdec_locate_byte_array(gd->fdt_blob, 575 ofnode_to_offset(node), propname, sz); 576 } 577 } 578 579 int ofnode_read_pci_addr(ofnode node, enum fdt_pci_space type, 580 const char *propname, struct fdt_pci_addr *addr) 581 { 582 const fdt32_t *cell; 583 int len; 584 int ret = -ENOENT; 585 586 debug("%s: %s: ", __func__, propname); 587 588 /* 589 * If we follow the pci bus bindings strictly, we should check 590 * the value of the node's parent node's #address-cells and 591 * #size-cells. They need to be 3 and 2 accordingly. However, 592 * for simplicity we skip the check here. 593 */ 594 cell = ofnode_get_property(node, propname, &len); 595 if (!cell) 596 goto fail; 597 598 if ((len % FDT_PCI_REG_SIZE) == 0) { 599 int num = len / FDT_PCI_REG_SIZE; 600 int i; 601 602 for (i = 0; i < num; i++) { 603 debug("pci address #%d: %08lx %08lx %08lx\n", i, 604 (ulong)fdt32_to_cpu(cell[0]), 605 (ulong)fdt32_to_cpu(cell[1]), 606 (ulong)fdt32_to_cpu(cell[2])); 607 if ((fdt32_to_cpu(*cell) & type) == type) { 608 addr->phys_hi = fdt32_to_cpu(cell[0]); 609 addr->phys_mid = fdt32_to_cpu(cell[1]); 610 addr->phys_lo = fdt32_to_cpu(cell[1]); 611 break; 612 } 613 614 cell += (FDT_PCI_ADDR_CELLS + 615 FDT_PCI_SIZE_CELLS); 616 } 617 618 if (i == num) { 619 ret = -ENXIO; 620 goto fail; 621 } 622 623 return 0; 624 } 625 626 ret = -EINVAL; 627 628 fail: 629 debug("(not found)\n"); 630 return ret; 631 } 632 633 int ofnode_read_pci_vendev(ofnode node, u16 *vendor, u16 *device) 634 { 635 const char *list, *end; 636 int len; 637 638 list = ofnode_get_property(node, "compatible", &len); 639 if (!list) 640 return -ENOENT; 641 642 end = list + len; 643 while (list < end) { 644 len = strlen(list); 645 if (len >= strlen("pciVVVV,DDDD")) { 646 char *s = strstr(list, "pci"); 647 648 /* 649 * check if the string is something like pciVVVV,DDDD.RR 650 * or just pciVVVV,DDDD 651 */ 652 if (s && s[7] == ',' && 653 (s[12] == '.' || s[12] == 0)) { 654 s += 3; 655 *vendor = simple_strtol(s, NULL, 16); 656 657 s += 5; 658 *device = simple_strtol(s, NULL, 16); 659 660 return 0; 661 } 662 } 663 list += (len + 1); 664 } 665 666 return -ENOENT; 667 } 668 669 int ofnode_read_addr_cells(ofnode node) 670 { 671 if (ofnode_is_np(node)) 672 return of_n_addr_cells(ofnode_to_np(node)); 673 else /* NOTE: this call should walk up the parent stack */ 674 return fdt_address_cells(gd->fdt_blob, ofnode_to_offset(node)); 675 } 676 677 int ofnode_read_size_cells(ofnode node) 678 { 679 if (ofnode_is_np(node)) 680 return of_n_size_cells(ofnode_to_np(node)); 681 else /* NOTE: this call should walk up the parent stack */ 682 return fdt_size_cells(gd->fdt_blob, ofnode_to_offset(node)); 683 } 684 685 int ofnode_read_simple_addr_cells(ofnode node) 686 { 687 if (ofnode_is_np(node)) 688 return of_simple_addr_cells(ofnode_to_np(node)); 689 else 690 return fdt_address_cells(gd->fdt_blob, ofnode_to_offset(node)); 691 } 692 693 int ofnode_read_simple_size_cells(ofnode node) 694 { 695 if (ofnode_is_np(node)) 696 return of_simple_size_cells(ofnode_to_np(node)); 697 else 698 return fdt_size_cells(gd->fdt_blob, ofnode_to_offset(node)); 699 } 700 701 bool ofnode_pre_reloc(ofnode node) 702 { 703 if (ofnode_read_bool(node, "u-boot,dm-pre-reloc")) 704 return true; 705 if (ofnode_read_bool(node, "u-boot,dm-pre-proper")) 706 return true; 707 708 #ifdef CONFIG_TPL_BUILD 709 if (ofnode_read_bool(node, "u-boot,dm-tpl")) 710 return true; 711 #elif defined(CONFIG_SPL_BUILD) 712 if (ofnode_read_bool(node, "u-boot,dm-spl")) 713 return true; 714 #else 715 /* 716 * In regular builds individual spl and tpl handling both 717 * count as handled pre-relocation for later second init. 718 */ 719 if (ofnode_read_bool(node, "u-boot,dm-spl") || 720 ofnode_read_bool(node, "u-boot,dm-tpl")) 721 return true; 722 #endif 723 724 return false; 725 } 726 727 int ofnode_read_resource(ofnode node, uint index, struct resource *res) 728 { 729 if (ofnode_is_np(node)) { 730 return of_address_to_resource(ofnode_to_np(node), index, res); 731 } else { 732 struct fdt_resource fres; 733 int ret; 734 735 ret = fdt_get_resource(gd->fdt_blob, ofnode_to_offset(node), 736 "reg", index, &fres); 737 if (ret < 0) 738 return -EINVAL; 739 memset(res, '\0', sizeof(*res)); 740 res->start = fres.start; 741 res->end = fres.end; 742 743 return 0; 744 } 745 } 746 747 int ofnode_read_resource_byname(ofnode node, const char *name, 748 struct resource *res) 749 { 750 int index; 751 752 index = ofnode_stringlist_search(node, "reg-names", name); 753 if (index < 0) 754 return index; 755 756 return ofnode_read_resource(node, index, res); 757 } 758 759 u64 ofnode_translate_address(ofnode node, const fdt32_t *in_addr) 760 { 761 if (ofnode_is_np(node)) 762 return of_translate_address(ofnode_to_np(node), in_addr); 763 else 764 return fdt_translate_address(gd->fdt_blob, ofnode_to_offset(node), in_addr); 765 } 766 767 int ofnode_device_is_compatible(ofnode node, const char *compat) 768 { 769 if (ofnode_is_np(node)) 770 return of_device_is_compatible(ofnode_to_np(node), compat, 771 NULL, NULL); 772 else 773 return !fdt_node_check_compatible(gd->fdt_blob, 774 ofnode_to_offset(node), 775 compat); 776 } 777 778 ofnode ofnode_by_compatible(ofnode from, const char *compat) 779 { 780 if (of_live_active()) { 781 return np_to_ofnode(of_find_compatible_node( 782 (struct device_node *)ofnode_to_np(from), NULL, 783 compat)); 784 } else { 785 return offset_to_ofnode(fdt_node_offset_by_compatible( 786 gd->fdt_blob, ofnode_to_offset(from), compat)); 787 } 788 } 789 790 ofnode ofnode_by_prop_value(ofnode from, const char *propname, 791 const void *propval, int proplen) 792 { 793 if (of_live_active()) { 794 return np_to_ofnode(of_find_node_by_prop_value( 795 (struct device_node *)ofnode_to_np(from), propname, 796 propval, proplen)); 797 } else { 798 return offset_to_ofnode(fdt_node_offset_by_prop_value( 799 gd->fdt_blob, ofnode_to_offset(from), 800 propname, propval, proplen)); 801 } 802 } 803 804 int ofnode_write_prop(ofnode node, const char *propname, int len, 805 const void *value) 806 { 807 const struct device_node *np = ofnode_to_np(node); 808 struct property *pp; 809 struct property *pp_last = NULL; 810 struct property *new; 811 812 if (!of_live_active()) 813 return -ENOSYS; 814 815 if (!np) 816 return -EINVAL; 817 818 for (pp = np->properties; pp; pp = pp->next) { 819 if (strcmp(pp->name, propname) == 0) { 820 /* Property exists -> change value */ 821 pp->value = (void *)value; 822 pp->length = len; 823 return 0; 824 } 825 pp_last = pp; 826 } 827 828 if (!pp_last) 829 return -ENOENT; 830 831 /* Property does not exist -> append new property */ 832 new = malloc(sizeof(struct property)); 833 if (!new) 834 return -ENOMEM; 835 836 new->name = strdup(propname); 837 if (!new->name) { 838 free(new); 839 return -ENOMEM; 840 } 841 842 new->value = (void *)value; 843 new->length = len; 844 new->next = NULL; 845 846 pp_last->next = new; 847 848 return 0; 849 } 850 851 int ofnode_write_string(ofnode node, const char *propname, const char *value) 852 { 853 if (!of_live_active()) 854 return -ENOSYS; 855 856 assert(ofnode_valid(node)); 857 858 debug("%s: %s = %s", __func__, propname, value); 859 860 return ofnode_write_prop(node, propname, strlen(value) + 1, value); 861 } 862 863 int ofnode_set_enabled(ofnode node, bool value) 864 { 865 if (!of_live_active()) 866 return -ENOSYS; 867 868 assert(ofnode_valid(node)); 869 870 if (value) 871 return ofnode_write_string(node, "status", "okay"); 872 else 873 return ofnode_write_string(node, "status", "disable"); 874 } 875