drivers/core/ofnode.c

   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 }