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
 258         if (ofnode_is_np(node)) {
 259                 const __be32 *prop_val;
 260                 uint flags;
 261
 262                 prop_val = of_get_address(ofnode_to_np(node), index,
 263                                           NULL, &flags);
 264                 if (!prop_val)
 265                         return FDT_ADDR_T_NONE;
 266
 267                 ns = of_n_size_cells(ofnode_to_np(node));
 268
 269                 if (IS_ENABLED(CONFIG_OF_TRANSLATE) && ns > 0) {
 270                         return of_translate_address(ofnode_to_np(node), prop_val);
 271                 } else {
 272                         na = of_n_addr_cells(ofnode_to_np(node));
 273                         return of_read_number(prop_val, na);
 274                 }
 275         } else {
 276                 na = ofnode_read_simple_addr_cells(ofnode_get_parent(node));
 277                 ns = ofnode_read_simple_size_cells(ofnode_get_parent(node));
 278                 return fdtdec_get_addr_size_fixed(gd->fdt_blob,
 279                                                   ofnode_to_offset(node), "reg",
 280                                                   index, na, ns, NULL, true);
 281         }
 282
 283         return FDT_ADDR_T_NONE;
 284 }
 285
 286 fdt_addr_t ofnode_get_addr(ofnode node)
 287 {
 288         return ofnode_get_addr_index(node, 0);
 289 }
 290
 291 int ofnode_stringlist_search(ofnode node, const char *property,
 292                              const char *string)
 293 {
 294         if (ofnode_is_np(node)) {
 295                 return of_property_match_string(ofnode_to_np(node),
 296                                                 property, string);
 297         } else {
 298                 int ret;
 299
 300                 ret = fdt_stringlist_search(gd->fdt_blob,
 301                                             ofnode_to_offset(node), property,
 302                                             string);
 303                 if (ret == -FDT_ERR_NOTFOUND)
 304                         return -ENODATA;
 305                 else if (ret < 0)
 306                         return -EINVAL;
 307
 308                 return ret;
 309         }
 310 }
 311
 312 int ofnode_read_string_index(ofnode node, const char *property, int index,
 313                              const char **outp)
 314 {
 315         if (ofnode_is_np(node)) {
 316                 return of_property_read_string_index(ofnode_to_np(node),
 317                                                      property, index, outp);
 318         } else {
 319                 int len;
 320
 321                 *outp = fdt_stringlist_get(gd->fdt_blob, ofnode_to_offset(node),
 322                                            property, index, &len);
 323                 if (len < 0)
 324                         return -EINVAL;
 325                 return 0;
 326         }
 327 }
 328
 329 int ofnode_read_string_count(ofnode node, const char *property)
 330 {
 331         if (ofnode_is_np(node)) {
 332                 return of_property_count_strings(ofnode_to_np(node), property);
 333         } else {
 334                 return fdt_stringlist_count(gd->fdt_blob,
 335                                             ofnode_to_offset(node), property);
 336         }
 337 }
 338
 339 static void ofnode_from_fdtdec_phandle_args(struct fdtdec_phandle_args *in,
 340                                             struct ofnode_phandle_args *out)
 341 {
 342         assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS);
 343         out->node = offset_to_ofnode(in->node);
 344         out->args_count = in->args_count;
 345         memcpy(out->args, in->args, sizeof(out->args));
 346 }
 347
 348 static void ofnode_from_of_phandle_args(struct of_phandle_args *in,
 349                                         struct ofnode_phandle_args *out)
 350 {
 351         assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS);
 352         out->node = np_to_ofnode(in->np);
 353         out->args_count = in->args_count;
 354         memcpy(out->args, in->args, sizeof(out->args));
 355 }
 356
 357 int ofnode_parse_phandle_with_args(ofnode node, const char *list_name,
 358                                    const char *cells_name, int cell_count,
 359                                    int index,
 360                                    struct ofnode_phandle_args *out_args)
 361 {
 362         if (ofnode_is_np(node)) {
 363                 struct of_phandle_args args;
 364                 int ret;
 365
 366                 ret = of_parse_phandle_with_args(ofnode_to_np(node),
 367                                                  list_name, cells_name, index,
 368                                                  &args);
 369                 if (ret)
 370                         return ret;
 371                 ofnode_from_of_phandle_args(&args, out_args);
 372         } else {
 373                 struct fdtdec_phandle_args args;
 374                 int ret;
 375
 376                 ret = fdtdec_parse_phandle_with_args(gd->fdt_blob,
 377                                                      ofnode_to_offset(node),
 378                                                      list_name, cells_name,
 379                                                      cell_count, index, &args);
 380                 if (ret)
 381                         return ret;
 382                 ofnode_from_fdtdec_phandle_args(&args, out_args);
 383         }
 384
 385         return 0;
 386 }
 387
 388 int ofnode_count_phandle_with_args(ofnode node, const char *list_name,
 389                                    const char *cells_name)
 390 {
 391         if (ofnode_is_np(node))
 392                 return of_count_phandle_with_args(ofnode_to_np(node),
 393                                 list_name, cells_name);
 394         else
 395                 return fdtdec_parse_phandle_with_args(gd->fdt_blob,
 396                                 ofnode_to_offset(node), list_name, cells_name,
 397                                 0, -1, NULL);
 398 }
 399
 400 ofnode ofnode_path(const char *path)
 401 {
 402         if (of_live_active())
 403                 return np_to_ofnode(of_find_node_by_path(path));
 404         else
 405                 return offset_to_ofnode(fdt_path_offset(gd->fdt_blob, path));
 406 }
 407
 408 const char *ofnode_get_chosen_prop(const char *name)
 409 {
 410         ofnode chosen_node;
 411
 412         chosen_node = ofnode_path("/chosen");
 413
 414         return ofnode_read_string(chosen_node, name);
 415 }
 416
 417 ofnode ofnode_get_chosen_node(const char *name)
 418 {
 419         const char *prop;
 420
 421         prop = ofnode_get_chosen_prop(name);
 422         if (!prop)
 423                 return ofnode_null();
 424
 425         return ofnode_path(prop);
 426 }
 427
 428 static int decode_timing_property(ofnode node, const char *name,
 429                                   struct timing_entry *result)
 430 {
 431         int length, ret = 0;
 432
 433         length = ofnode_read_size(node, name);
 434         if (length < 0) {
 435                 debug("%s: could not find property %s\n",
 436                       ofnode_get_name(node), name);
 437                 return length;
 438         }
 439
 440         if (length == sizeof(u32)) {
 441                 result->typ = ofnode_read_u32_default(node, name, 0);
 442                 result->min = result->typ;
 443                 result->max = result->typ;
 444         } else {
 445                 ret = ofnode_read_u32_array(node, name, &result->min, 3);
 446         }
 447
 448         return ret;
 449 }
 450
 451 int ofnode_decode_display_timing(ofnode parent, int index,
 452                                  struct display_timing *dt)
 453 {
 454         int i;
 455         ofnode timings, node;
 456         u32 val = 0;
 457         int ret = 0;
 458
 459         timings = ofnode_find_subnode(parent, "display-timings");
 460         if (!ofnode_valid(timings))
 461                 return -EINVAL;
 462
 463         i = 0;
 464         ofnode_for_each_subnode(node, timings) {
 465                 if (i++ == index)
 466                         break;
 467         }
 468
 469         if (!ofnode_valid(node))
 470                 return -EINVAL;
 471
 472         memset(dt, 0, sizeof(*dt));
 473
 474         ret |= decode_timing_property(node, "hback-porch", &dt->hback_porch);
 475         ret |= decode_timing_property(node, "hfront-porch", &dt->hfront_porch);
 476         ret |= decode_timing_property(node, "hactive", &dt->hactive);
 477         ret |= decode_timing_property(node, "hsync-len", &dt->hsync_len);
 478         ret |= decode_timing_property(node, "vback-porch", &dt->vback_porch);
 479         ret |= decode_timing_property(node, "vfront-porch", &dt->vfront_porch);
 480         ret |= decode_timing_property(node, "vactive", &dt->vactive);
 481         ret |= decode_timing_property(node, "vsync-len", &dt->vsync_len);
 482         ret |= decode_timing_property(node, "clock-frequency", &dt->pixelclock);
 483
 484         dt->flags = 0;
 485         val = ofnode_read_u32_default(node, "vsync-active", -1);
 486         if (val != -1) {
 487                 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
 488                                 DISPLAY_FLAGS_VSYNC_LOW;
 489         }
 490         val = ofnode_read_u32_default(node, "hsync-active", -1);
 491         if (val != -1) {
 492                 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
 493                                 DISPLAY_FLAGS_HSYNC_LOW;
 494         }
 495         val = ofnode_read_u32_default(node, "de-active", -1);
 496         if (val != -1) {
 497                 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
 498                                 DISPLAY_FLAGS_DE_LOW;
 499         }
 500         val = ofnode_read_u32_default(node, "pixelclk-active", -1);
 501         if (val != -1) {
 502                 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
 503                                 DISPLAY_FLAGS_PIXDATA_NEGEDGE;
 504         }
 505
 506         if (ofnode_read_bool(node, "interlaced"))
 507                 dt->flags |= DISPLAY_FLAGS_INTERLACED;
 508         if (ofnode_read_bool(node, "doublescan"))
 509                 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
 510         if (ofnode_read_bool(node, "doubleclk"))
 511                 dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
 512
 513         return ret;
 514 }
 515
 516 const void *ofnode_get_property(ofnode node, const char *propname, int *lenp)
 517 {
 518         if (ofnode_is_np(node))
 519                 return of_get_property(ofnode_to_np(node), propname, lenp);
 520         else
 521                 return fdt_getprop(gd->fdt_blob, ofnode_to_offset(node),
 522                                    propname, lenp);
 523 }
 524
 525 bool ofnode_is_available(ofnode node)
 526 {
 527         if (ofnode_is_np(node))
 528                 return of_device_is_available(ofnode_to_np(node));
 529         else
 530                 return fdtdec_get_is_enabled(gd->fdt_blob,
 531                                              ofnode_to_offset(node));
 532 }
 533
 534 fdt_addr_t ofnode_get_addr_size(ofnode node, const char *property,
 535                                 fdt_size_t *sizep)
 536 {
 537         if (ofnode_is_np(node)) {
 538                 int na, ns;
 539                 int psize;
 540                 const struct device_node *np = ofnode_to_np(node);
 541                 const __be32 *prop = of_get_property(np, property, &psize);
 542
 543                 if (!prop)
 544                         return FDT_ADDR_T_NONE;
 545                 na = of_n_addr_cells(np);
 546                 ns = of_n_size_cells(np);
 547                 *sizep = of_read_number(prop + na, ns);
 548
 549                 if (CONFIG_IS_ENABLED(OF_TRANSLATE) && ns > 0)
 550                         return of_translate_address(np, prop);
 551                 else
 552                         return of_read_number(prop, na);
 553         } else {
 554                 return fdtdec_get_addr_size(gd->fdt_blob,
 555                                             ofnode_to_offset(node), property,
 556                                             sizep);
 557         }
 558 }
 559
 560 const uint8_t *ofnode_read_u8_array_ptr(ofnode node, const char *propname,
 561                                         size_t sz)
 562 {
 563         if (ofnode_is_np(node)) {
 564                 const struct device_node *np = ofnode_to_np(node);
 565                 int psize;
 566                 const __be32 *prop = of_get_property(np, propname, &psize);
 567
 568                 if (!prop || sz != psize)
 569                         return NULL;
 570                 return (uint8_t *)prop;
 571
 572         } else {
 573                 return fdtdec_locate_byte_array(gd->fdt_blob,
 574                                 ofnode_to_offset(node), propname, sz);
 575         }
 576 }
 577
 578 int ofnode_read_pci_addr(ofnode node, enum fdt_pci_space type,
 579                          const char *propname, struct fdt_pci_addr *addr)
 580 {
 581         const fdt32_t *cell;
 582         int len;
 583         int ret = -ENOENT;
 584
 585         debug("%s: %s: ", __func__, propname);
 586
 587         /*
 588          * If we follow the pci bus bindings strictly, we should check
 589          * the value of the node's parent node's #address-cells and
 590          * #size-cells. They need to be 3 and 2 accordingly. However,
 591          * for simplicity we skip the check here.
 592          */
 593         cell = ofnode_get_property(node, propname, &len);
 594         if (!cell)
 595                 goto fail;
 596
 597         if ((len % FDT_PCI_REG_SIZE) == 0) {
 598                 int num = len / FDT_PCI_REG_SIZE;
 599                 int i;
 600
 601                 for (i = 0; i < num; i++) {
 602                         debug("pci address #%d: %08lx %08lx %08lx\n", i,
 603                               (ulong)fdt32_to_cpu(cell[0]),
 604                               (ulong)fdt32_to_cpu(cell[1]),
 605                               (ulong)fdt32_to_cpu(cell[2]));
 606                         if ((fdt32_to_cpu(*cell) & type) == type) {
 607                                 addr->phys_hi = fdt32_to_cpu(cell[0]);
 608                                 addr->phys_mid = fdt32_to_cpu(cell[1]);
 609                                 addr->phys_lo = fdt32_to_cpu(cell[1]);
 610                                 break;
 611                         }
 612
 613                         cell += (FDT_PCI_ADDR_CELLS +
 614                                  FDT_PCI_SIZE_CELLS);
 615                 }
 616
 617                 if (i == num) {
 618                         ret = -ENXIO;
 619                         goto fail;
 620                 }
 621
 622                 return 0;
 623         }
 624
 625         ret = -EINVAL;
 626
 627 fail:
 628         debug("(not found)\n");
 629         return ret;
 630 }
 631
 632 int ofnode_read_pci_vendev(ofnode node, u16 *vendor, u16 *device)
 633 {
 634         const char *list, *end;
 635         int len;
 636
 637         list = ofnode_get_property(node, "compatible", &len);
 638         if (!list)
 639                 return -ENOENT;
 640
 641         end = list + len;
 642         while (list < end) {
 643                 len = strlen(list);
 644                 if (len >= strlen("pciVVVV,DDDD")) {
 645                         char *s = strstr(list, "pci");
 646
 647                         /*
 648                          * check if the string is something like pciVVVV,DDDD.RR
 649                          * or just pciVVVV,DDDD
 650                          */
 651                         if (s && s[7] == ',' &&
 652                             (s[12] == '.' || s[12] == 0)) {
 653                                 s += 3;
 654                                 *vendor = simple_strtol(s, NULL, 16);
 655
 656                                 s += 5;
 657                                 *device = simple_strtol(s, NULL, 16);
 658
 659                                 return 0;
 660                         }
 661                 }
 662                 list += (len + 1);
 663         }
 664
 665         return -ENOENT;
 666 }
 667
 668 int ofnode_read_addr_cells(ofnode node)
 669 {
 670         if (ofnode_is_np(node))
 671                 return of_n_addr_cells(ofnode_to_np(node));
 672         else  /* NOTE: this call should walk up the parent stack */
 673                 return fdt_address_cells(gd->fdt_blob, ofnode_to_offset(node));
 674 }
 675
 676 int ofnode_read_size_cells(ofnode node)
 677 {
 678         if (ofnode_is_np(node))
 679                 return of_n_size_cells(ofnode_to_np(node));
 680         else  /* NOTE: this call should walk up the parent stack */
 681                 return fdt_size_cells(gd->fdt_blob, ofnode_to_offset(node));
 682 }
 683
 684 int ofnode_read_simple_addr_cells(ofnode node)
 685 {
 686         if (ofnode_is_np(node))
 687                 return of_simple_addr_cells(ofnode_to_np(node));
 688         else
 689                 return fdt_address_cells(gd->fdt_blob, ofnode_to_offset(node));
 690 }
 691
 692 int ofnode_read_simple_size_cells(ofnode node)
 693 {
 694         if (ofnode_is_np(node))
 695                 return of_simple_size_cells(ofnode_to_np(node));
 696         else
 697                 return fdt_size_cells(gd->fdt_blob, ofnode_to_offset(node));
 698 }
 699
 700 bool ofnode_pre_reloc(ofnode node)
 701 {
 702 #if defined(CONFIG_SPL_BUILD) || defined(CONFIG_TPL_BUILD)
 703         /* for SPL and TPL the remaining nodes after the fdtgrep 1st pass
 704          * had property dm-pre-reloc or u-boot,dm-spl/tpl.
 705          * They are removed in final dtb (fdtgrep 2nd pass)
 706          */
 707         return true;
 708 #else
 709         if (ofnode_read_bool(node, "u-boot,dm-pre-reloc"))
 710                 return true;
 711         if (ofnode_read_bool(node, "u-boot,dm-pre-proper"))
 712                 return true;
 713
 714         /*
 715          * In regular builds individual spl and tpl handling both
 716          * count as handled pre-relocation for later second init.
 717          */
 718         if (ofnode_read_bool(node, "u-boot,dm-spl") ||
 719             ofnode_read_bool(node, "u-boot,dm-tpl"))
 720                 return true;
 721
 722         return false;
 723 #endif
 724 }
 725
 726 int ofnode_read_resource(ofnode node, uint index, struct resource *res)
 727 {
 728         if (ofnode_is_np(node)) {
 729                 return of_address_to_resource(ofnode_to_np(node), index, res);
 730         } else {
 731                 struct fdt_resource fres;
 732                 int ret;
 733
 734                 ret = fdt_get_resource(gd->fdt_blob, ofnode_to_offset(node),
 735                                        "reg", index, &fres);
 736                 if (ret < 0)
 737                         return -EINVAL;
 738                 memset(res, '\0', sizeof(*res));
 739                 res->start = fres.start;
 740                 res->end = fres.end;
 741
 742                 return 0;
 743         }
 744 }
 745
 746 int ofnode_read_resource_byname(ofnode node, const char *name,
 747                                 struct resource *res)
 748 {
 749         int index;
 750
 751         index = ofnode_stringlist_search(node, "reg-names", name);
 752         if (index < 0)
 753                 return index;
 754
 755         return ofnode_read_resource(node, index, res);
 756 }
 757
 758 u64 ofnode_translate_address(ofnode node, const fdt32_t *in_addr)
 759 {
 760         if (ofnode_is_np(node))
 761                 return of_translate_address(ofnode_to_np(node), in_addr);
 762         else
 763                 return fdt_translate_address(gd->fdt_blob, ofnode_to_offset(node), in_addr);
 764 }
 765
 766 int ofnode_device_is_compatible(ofnode node, const char *compat)
 767 {
 768         if (ofnode_is_np(node))
 769                 return of_device_is_compatible(ofnode_to_np(node), compat,
 770                                                NULL, NULL);
 771         else
 772                 return !fdt_node_check_compatible(gd->fdt_blob,
 773                                                   ofnode_to_offset(node),
 774                                                   compat);
 775 }
 776
 777 ofnode ofnode_by_compatible(ofnode from, const char *compat)
 778 {
 779         if (of_live_active()) {
 780                 return np_to_ofnode(of_find_compatible_node(
 781                         (struct device_node *)ofnode_to_np(from), NULL,
 782                         compat));
 783         } else {
 784                 return offset_to_ofnode(fdt_node_offset_by_compatible(
 785                                 gd->fdt_blob, ofnode_to_offset(from), compat));
 786         }
 787 }
 788
 789 ofnode ofnode_by_prop_value(ofnode from, const char *propname,
 790                             const void *propval, int proplen)
 791 {
 792         if (of_live_active()) {
 793                 return np_to_ofnode(of_find_node_by_prop_value(
 794                         (struct device_node *)ofnode_to_np(from), propname,
 795                         propval, proplen));
 796         } else {
 797                 return offset_to_ofnode(fdt_node_offset_by_prop_value(
 798                                 gd->fdt_blob, ofnode_to_offset(from),
 799                                 propname, propval, proplen));
 800         }
 801 }
 802
 803 int ofnode_write_prop(ofnode node, const char *propname, int len,
 804                       const void *value)
 805 {
 806         const struct device_node *np = ofnode_to_np(node);
 807         struct property *pp;
 808         struct property *pp_last = NULL;
 809         struct property *new;
 810
 811         if (!of_live_active())
 812                 return -ENOSYS;
 813
 814         if (!np)
 815                 return -EINVAL;
 816
 817         for (pp = np->properties; pp; pp = pp->next) {
 818                 if (strcmp(pp->name, propname) == 0) {
 819                         /* Property exists -> change value */
 820                         pp->value = (void *)value;
 821                         pp->length = len;
 822                         return 0;
 823                 }
 824                 pp_last = pp;
 825         }
 826
 827         if (!pp_last)
 828                 return -ENOENT;
 829
 830         /* Property does not exist -> append new property */
 831         new = malloc(sizeof(struct property));
 832         if (!new)
 833                 return -ENOMEM;
 834
 835         new->name = strdup(propname);
 836         if (!new->name) {
 837                 free(new);
 838                 return -ENOMEM;
 839         }
 840
 841         new->value = (void *)value;
 842         new->length = len;
 843         new->next = NULL;
 844
 845         pp_last->next = new;
 846
 847         return 0;
 848 }
 849
 850 int ofnode_write_string(ofnode node, const char *propname, const char *value)
 851 {
 852         if (!of_live_active())
 853                 return -ENOSYS;
 854
 855         assert(ofnode_valid(node));
 856
 857         debug("%s: %s = %s", __func__, propname, value);
 858
 859         return ofnode_write_prop(node, propname, strlen(value) + 1, value);
 860 }
 861
 862 int ofnode_set_enabled(ofnode node, bool value)
 863 {
 864         if (!of_live_active())
 865                 return -ENOSYS;
 866
 867         assert(ofnode_valid(node));
 868
 869         if (value)
 870                 return ofnode_write_string(node, "status", "okay");
 871         else
 872                 return ofnode_write_string(node, "status", "disable");
 873 }