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 u32 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_size_index(ofnode node, int index, fdt_size_t *size)
 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                                           (u64 *)size, &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, size, true);
 281         }
 282
 283         return FDT_ADDR_T_NONE;
 284 }
 285
 286 fdt_addr_t ofnode_get_addr_index(ofnode node, int index)
 287 {
 288         fdt_size_t size;
 289
 290         return ofnode_get_addr_size_index(node, index, &size);
 291 }
 292
 293 fdt_addr_t ofnode_get_addr(ofnode node)
 294 {
 295         return ofnode_get_addr_index(node, 0);
 296 }
 297
 298 int ofnode_stringlist_search(ofnode node, const char *property,
 299                              const char *string)
 300 {
 301         if (ofnode_is_np(node)) {
 302                 return of_property_match_string(ofnode_to_np(node),
 303                                                 property, string);
 304         } else {
 305                 int ret;
 306
 307                 ret = fdt_stringlist_search(gd->fdt_blob,
 308                                             ofnode_to_offset(node), property,
 309                                             string);
 310                 if (ret == -FDT_ERR_NOTFOUND)
 311                         return -ENODATA;
 312                 else if (ret < 0)
 313                         return -EINVAL;
 314
 315                 return ret;
 316         }
 317 }
 318
 319 int ofnode_read_string_index(ofnode node, const char *property, int index,
 320                              const char **outp)
 321 {
 322         if (ofnode_is_np(node)) {
 323                 return of_property_read_string_index(ofnode_to_np(node),
 324                                                      property, index, outp);
 325         } else {
 326                 int len;
 327
 328                 *outp = fdt_stringlist_get(gd->fdt_blob, ofnode_to_offset(node),
 329                                            property, index, &len);
 330                 if (len < 0)
 331                         return -EINVAL;
 332                 return 0;
 333         }
 334 }
 335
 336 int ofnode_read_string_count(ofnode node, const char *property)
 337 {
 338         if (ofnode_is_np(node)) {
 339                 return of_property_count_strings(ofnode_to_np(node), property);
 340         } else {
 341                 return fdt_stringlist_count(gd->fdt_blob,
 342                                             ofnode_to_offset(node), property);
 343         }
 344 }
 345
 346 static void ofnode_from_fdtdec_phandle_args(struct fdtdec_phandle_args *in,
 347                                             struct ofnode_phandle_args *out)
 348 {
 349         assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS);
 350         out->node = offset_to_ofnode(in->node);
 351         out->args_count = in->args_count;
 352         memcpy(out->args, in->args, sizeof(out->args));
 353 }
 354
 355 static void ofnode_from_of_phandle_args(struct of_phandle_args *in,
 356                                         struct ofnode_phandle_args *out)
 357 {
 358         assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS);
 359         out->node = np_to_ofnode(in->np);
 360         out->args_count = in->args_count;
 361         memcpy(out->args, in->args, sizeof(out->args));
 362 }
 363
 364 int ofnode_parse_phandle_with_args(ofnode node, const char *list_name,
 365                                    const char *cells_name, int cell_count,
 366                                    int index,
 367                                    struct ofnode_phandle_args *out_args)
 368 {
 369         if (ofnode_is_np(node)) {
 370                 struct of_phandle_args args;
 371                 int ret;
 372
 373                 ret = of_parse_phandle_with_args(ofnode_to_np(node),
 374                                                  list_name, cells_name, index,
 375                                                  &args);
 376                 if (ret)
 377                         return ret;
 378                 ofnode_from_of_phandle_args(&args, out_args);
 379         } else {
 380                 struct fdtdec_phandle_args args;
 381                 int ret;
 382
 383                 ret = fdtdec_parse_phandle_with_args(gd->fdt_blob,
 384                                                      ofnode_to_offset(node),
 385                                                      list_name, cells_name,
 386                                                      cell_count, index, &args);
 387                 if (ret)
 388                         return ret;
 389                 ofnode_from_fdtdec_phandle_args(&args, out_args);
 390         }
 391
 392         return 0;
 393 }
 394
 395 int ofnode_count_phandle_with_args(ofnode node, const char *list_name,
 396                                    const char *cells_name)
 397 {
 398         if (ofnode_is_np(node))
 399                 return of_count_phandle_with_args(ofnode_to_np(node),
 400                                 list_name, cells_name);
 401         else
 402                 return fdtdec_parse_phandle_with_args(gd->fdt_blob,
 403                                 ofnode_to_offset(node), list_name, cells_name,
 404                                 0, -1, NULL);
 405 }
 406
 407 ofnode ofnode_path(const char *path)
 408 {
 409         if (of_live_active())
 410                 return np_to_ofnode(of_find_node_by_path(path));
 411         else
 412                 return offset_to_ofnode(fdt_path_offset(gd->fdt_blob, path));
 413 }
 414
 415 const char *ofnode_get_chosen_prop(const char *name)
 416 {
 417         ofnode chosen_node;
 418
 419         chosen_node = ofnode_path("/chosen");
 420
 421         return ofnode_read_string(chosen_node, name);
 422 }
 423
 424 ofnode ofnode_get_chosen_node(const char *name)
 425 {
 426         const char *prop;
 427
 428         prop = ofnode_get_chosen_prop(name);
 429         if (!prop)
 430                 return ofnode_null();
 431
 432         return ofnode_path(prop);
 433 }
 434
 435 static int decode_timing_property(ofnode node, const char *name,
 436                                   struct timing_entry *result)
 437 {
 438         int length, ret = 0;
 439
 440         length = ofnode_read_size(node, name);
 441         if (length < 0) {
 442                 debug("%s: could not find property %s\n",
 443                       ofnode_get_name(node), name);
 444                 return length;
 445         }
 446
 447         if (length == sizeof(u32)) {
 448                 result->typ = ofnode_read_u32_default(node, name, 0);
 449                 result->min = result->typ;
 450                 result->max = result->typ;
 451         } else {
 452                 ret = ofnode_read_u32_array(node, name, &result->min, 3);
 453         }
 454
 455         return ret;
 456 }
 457
 458 int ofnode_decode_display_timing(ofnode parent, int index,
 459                                  struct display_timing *dt)
 460 {
 461         int i;
 462         ofnode timings, node;
 463         u32 val = 0;
 464         int ret = 0;
 465
 466         timings = ofnode_find_subnode(parent, "display-timings");
 467         if (!ofnode_valid(timings))
 468                 return -EINVAL;
 469
 470         i = 0;
 471         ofnode_for_each_subnode(node, timings) {
 472                 if (i++ == index)
 473                         break;
 474         }
 475
 476         if (!ofnode_valid(node))
 477                 return -EINVAL;
 478
 479         memset(dt, 0, sizeof(*dt));
 480
 481         ret |= decode_timing_property(node, "hback-porch", &dt->hback_porch);
 482         ret |= decode_timing_property(node, "hfront-porch", &dt->hfront_porch);
 483         ret |= decode_timing_property(node, "hactive", &dt->hactive);
 484         ret |= decode_timing_property(node, "hsync-len", &dt->hsync_len);
 485         ret |= decode_timing_property(node, "vback-porch", &dt->vback_porch);
 486         ret |= decode_timing_property(node, "vfront-porch", &dt->vfront_porch);
 487         ret |= decode_timing_property(node, "vactive", &dt->vactive);
 488         ret |= decode_timing_property(node, "vsync-len", &dt->vsync_len);
 489         ret |= decode_timing_property(node, "clock-frequency", &dt->pixelclock);
 490
 491         dt->flags = 0;
 492         val = ofnode_read_u32_default(node, "vsync-active", -1);
 493         if (val != -1) {
 494                 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
 495                                 DISPLAY_FLAGS_VSYNC_LOW;
 496         }
 497         val = ofnode_read_u32_default(node, "hsync-active", -1);
 498         if (val != -1) {
 499                 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
 500                                 DISPLAY_FLAGS_HSYNC_LOW;
 501         }
 502         val = ofnode_read_u32_default(node, "de-active", -1);
 503         if (val != -1) {
 504                 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
 505                                 DISPLAY_FLAGS_DE_LOW;
 506         }
 507         val = ofnode_read_u32_default(node, "pixelclk-active", -1);
 508         if (val != -1) {
 509                 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
 510                                 DISPLAY_FLAGS_PIXDATA_NEGEDGE;
 511         }
 512
 513         if (ofnode_read_bool(node, "interlaced"))
 514                 dt->flags |= DISPLAY_FLAGS_INTERLACED;
 515         if (ofnode_read_bool(node, "doublescan"))
 516                 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
 517         if (ofnode_read_bool(node, "doubleclk"))
 518                 dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
 519
 520         return ret;
 521 }
 522
 523 const void *ofnode_get_property(ofnode node, const char *propname, int *lenp)
 524 {
 525         if (ofnode_is_np(node))
 526                 return of_get_property(ofnode_to_np(node), propname, lenp);
 527         else
 528                 return fdt_getprop(gd->fdt_blob, ofnode_to_offset(node),
 529                                    propname, lenp);
 530 }
 531
 532 bool ofnode_is_available(ofnode node)
 533 {
 534         if (ofnode_is_np(node))
 535                 return of_device_is_available(ofnode_to_np(node));
 536         else
 537                 return fdtdec_get_is_enabled(gd->fdt_blob,
 538                                              ofnode_to_offset(node));
 539 }
 540
 541 fdt_addr_t ofnode_get_addr_size(ofnode node, const char *property,
 542                                 fdt_size_t *sizep)
 543 {
 544         if (ofnode_is_np(node)) {
 545                 int na, ns;
 546                 int psize;
 547                 const struct device_node *np = ofnode_to_np(node);
 548                 const __be32 *prop = of_get_property(np, property, &psize);
 549
 550                 if (!prop)
 551                         return FDT_ADDR_T_NONE;
 552                 na = of_n_addr_cells(np);
 553                 ns = of_n_size_cells(np);
 554                 *sizep = of_read_number(prop + na, ns);
 555
 556                 if (CONFIG_IS_ENABLED(OF_TRANSLATE) && ns > 0)
 557                         return of_translate_address(np, prop);
 558                 else
 559                         return of_read_number(prop, na);
 560         } else {
 561                 return fdtdec_get_addr_size(gd->fdt_blob,
 562                                             ofnode_to_offset(node), property,
 563                                             sizep);
 564         }
 565 }
 566
 567 const uint8_t *ofnode_read_u8_array_ptr(ofnode node, const char *propname,
 568                                         size_t sz)
 569 {
 570         if (ofnode_is_np(node)) {
 571                 const struct device_node *np = ofnode_to_np(node);
 572                 int psize;
 573                 const __be32 *prop = of_get_property(np, propname, &psize);
 574
 575                 if (!prop || sz != psize)
 576                         return NULL;
 577                 return (uint8_t *)prop;
 578
 579         } else {
 580                 return fdtdec_locate_byte_array(gd->fdt_blob,
 581                                 ofnode_to_offset(node), propname, sz);
 582         }
 583 }
 584
 585 int ofnode_read_pci_addr(ofnode node, enum fdt_pci_space type,
 586                          const char *propname, struct fdt_pci_addr *addr)
 587 {
 588         const fdt32_t *cell;
 589         int len;
 590         int ret = -ENOENT;
 591
 592         debug("%s: %s: ", __func__, propname);
 593
 594         /*
 595          * If we follow the pci bus bindings strictly, we should check
 596          * the value of the node's parent node's #address-cells and
 597          * #size-cells. They need to be 3 and 2 accordingly. However,
 598          * for simplicity we skip the check here.
 599          */
 600         cell = ofnode_get_property(node, propname, &len);
 601         if (!cell)
 602                 goto fail;
 603
 604         if ((len % FDT_PCI_REG_SIZE) == 0) {
 605                 int num = len / FDT_PCI_REG_SIZE;
 606                 int i;
 607
 608                 for (i = 0; i < num; i++) {
 609                         debug("pci address #%d: %08lx %08lx %08lx\n", i,
 610                               (ulong)fdt32_to_cpu(cell[0]),
 611                               (ulong)fdt32_to_cpu(cell[1]),
 612                               (ulong)fdt32_to_cpu(cell[2]));
 613                         if ((fdt32_to_cpu(*cell) & type) == type) {
 614                                 addr->phys_hi = fdt32_to_cpu(cell[0]);
 615                                 addr->phys_mid = fdt32_to_cpu(cell[1]);
 616                                 addr->phys_lo = fdt32_to_cpu(cell[1]);
 617                                 break;
 618                         }
 619
 620                         cell += (FDT_PCI_ADDR_CELLS +
 621                                  FDT_PCI_SIZE_CELLS);
 622                 }
 623
 624                 if (i == num) {
 625                         ret = -ENXIO;
 626                         goto fail;
 627                 }
 628
 629                 return 0;
 630         }
 631
 632         ret = -EINVAL;
 633
 634 fail:
 635         debug("(not found)\n");
 636         return ret;
 637 }
 638
 639 int ofnode_read_pci_vendev(ofnode node, u16 *vendor, u16 *device)
 640 {
 641         const char *list, *end;
 642         int len;
 643
 644         list = ofnode_get_property(node, "compatible", &len);
 645         if (!list)
 646                 return -ENOENT;
 647
 648         end = list + len;
 649         while (list < end) {
 650                 len = strlen(list);
 651                 if (len >= strlen("pciVVVV,DDDD")) {
 652                         char *s = strstr(list, "pci");
 653
 654                         /*
 655                          * check if the string is something like pciVVVV,DDDD.RR
 656                          * or just pciVVVV,DDDD
 657                          */
 658                         if (s && s[7] == ',' &&
 659                             (s[12] == '.' || s[12] == 0)) {
 660                                 s += 3;
 661                                 *vendor = simple_strtol(s, NULL, 16);
 662
 663                                 s += 5;
 664                                 *device = simple_strtol(s, NULL, 16);
 665
 666                                 return 0;
 667                         }
 668                 }
 669                 list += (len + 1);
 670         }
 671
 672         return -ENOENT;
 673 }
 674
 675 int ofnode_read_addr_cells(ofnode node)
 676 {
 677         if (ofnode_is_np(node))
 678                 return of_n_addr_cells(ofnode_to_np(node));
 679         else  /* NOTE: this call should walk up the parent stack */
 680                 return fdt_address_cells(gd->fdt_blob, ofnode_to_offset(node));
 681 }
 682
 683 int ofnode_read_size_cells(ofnode node)
 684 {
 685         if (ofnode_is_np(node))
 686                 return of_n_size_cells(ofnode_to_np(node));
 687         else  /* NOTE: this call should walk up the parent stack */
 688                 return fdt_size_cells(gd->fdt_blob, ofnode_to_offset(node));
 689 }
 690
 691 int ofnode_read_simple_addr_cells(ofnode node)
 692 {
 693         if (ofnode_is_np(node))
 694                 return of_simple_addr_cells(ofnode_to_np(node));
 695         else
 696                 return fdt_address_cells(gd->fdt_blob, ofnode_to_offset(node));
 697 }
 698
 699 int ofnode_read_simple_size_cells(ofnode node)
 700 {
 701         if (ofnode_is_np(node))
 702                 return of_simple_size_cells(ofnode_to_np(node));
 703         else
 704                 return fdt_size_cells(gd->fdt_blob, ofnode_to_offset(node));
 705 }
 706
 707 bool ofnode_pre_reloc(ofnode node)
 708 {
 709 #if defined(CONFIG_SPL_BUILD) || defined(CONFIG_TPL_BUILD)
 710         /* for SPL and TPL the remaining nodes after the fdtgrep 1st pass
 711          * had property dm-pre-reloc or u-boot,dm-spl/tpl.
 712          * They are removed in final dtb (fdtgrep 2nd pass)
 713          */
 714         return true;
 715 #else
 716         if (ofnode_read_bool(node, "u-boot,dm-pre-reloc"))
 717                 return true;
 718         if (ofnode_read_bool(node, "u-boot,dm-pre-proper"))
 719                 return true;
 720
 721         /*
 722          * In regular builds individual spl and tpl handling both
 723          * count as handled pre-relocation for later second init.
 724          */
 725         if (ofnode_read_bool(node, "u-boot,dm-spl") ||
 726             ofnode_read_bool(node, "u-boot,dm-tpl"))
 727                 return true;
 728
 729         return false;
 730 #endif
 731 }
 732
 733 int ofnode_read_resource(ofnode node, uint index, struct resource *res)
 734 {
 735         if (ofnode_is_np(node)) {
 736                 return of_address_to_resource(ofnode_to_np(node), index, res);
 737         } else {
 738                 struct fdt_resource fres;
 739                 int ret;
 740
 741                 ret = fdt_get_resource(gd->fdt_blob, ofnode_to_offset(node),
 742                                        "reg", index, &fres);
 743                 if (ret < 0)
 744                         return -EINVAL;
 745                 memset(res, '\0', sizeof(*res));
 746                 res->start = fres.start;
 747                 res->end = fres.end;
 748
 749                 return 0;
 750         }
 751 }
 752
 753 int ofnode_read_resource_byname(ofnode node, const char *name,
 754                                 struct resource *res)
 755 {
 756         int index;
 757
 758         index = ofnode_stringlist_search(node, "reg-names", name);
 759         if (index < 0)
 760                 return index;
 761
 762         return ofnode_read_resource(node, index, res);
 763 }
 764
 765 u64 ofnode_translate_address(ofnode node, const fdt32_t *in_addr)
 766 {
 767         if (ofnode_is_np(node))
 768                 return of_translate_address(ofnode_to_np(node), in_addr);
 769         else
 770                 return fdt_translate_address(gd->fdt_blob, ofnode_to_offset(node), in_addr);
 771 }
 772
 773 int ofnode_device_is_compatible(ofnode node, const char *compat)
 774 {
 775         if (ofnode_is_np(node))
 776                 return of_device_is_compatible(ofnode_to_np(node), compat,
 777                                                NULL, NULL);
 778         else
 779                 return !fdt_node_check_compatible(gd->fdt_blob,
 780                                                   ofnode_to_offset(node),
 781                                                   compat);
 782 }
 783
 784 ofnode ofnode_by_compatible(ofnode from, const char *compat)
 785 {
 786         if (of_live_active()) {
 787                 return np_to_ofnode(of_find_compatible_node(
 788                         (struct device_node *)ofnode_to_np(from), NULL,
 789                         compat));
 790         } else {
 791                 return offset_to_ofnode(fdt_node_offset_by_compatible(
 792                                 gd->fdt_blob, ofnode_to_offset(from), compat));
 793         }
 794 }
 795
 796 ofnode ofnode_by_prop_value(ofnode from, const char *propname,
 797                             const void *propval, int proplen)
 798 {
 799         if (of_live_active()) {
 800                 return np_to_ofnode(of_find_node_by_prop_value(
 801                         (struct device_node *)ofnode_to_np(from), propname,
 802                         propval, proplen));
 803         } else {
 804                 return offset_to_ofnode(fdt_node_offset_by_prop_value(
 805                                 gd->fdt_blob, ofnode_to_offset(from),
 806                                 propname, propval, proplen));
 807         }
 808 }
 809
 810 int ofnode_write_prop(ofnode node, const char *propname, int len,
 811                       const void *value)
 812 {
 813         const struct device_node *np = ofnode_to_np(node);
 814         struct property *pp;
 815         struct property *pp_last = NULL;
 816         struct property *new;
 817
 818         if (!of_live_active())
 819                 return -ENOSYS;
 820
 821         if (!np)
 822                 return -EINVAL;
 823
 824         for (pp = np->properties; pp; pp = pp->next) {
 825                 if (strcmp(pp->name, propname) == 0) {
 826                         /* Property exists -> change value */
 827                         pp->value = (void *)value;
 828                         pp->length = len;
 829                         return 0;
 830                 }
 831                 pp_last = pp;
 832         }
 833
 834         if (!pp_last)
 835                 return -ENOENT;
 836
 837         /* Property does not exist -> append new property */
 838         new = malloc(sizeof(struct property));
 839         if (!new)
 840                 return -ENOMEM;
 841
 842         new->name = strdup(propname);
 843         if (!new->name) {
 844                 free(new);
 845                 return -ENOMEM;
 846         }
 847
 848         new->value = (void *)value;
 849         new->length = len;
 850         new->next = NULL;
 851
 852         pp_last->next = new;
 853
 854         return 0;
 855 }
 856
 857 int ofnode_write_string(ofnode node, const char *propname, const char *value)
 858 {
 859         if (!of_live_active())
 860                 return -ENOSYS;
 861
 862         assert(ofnode_valid(node));
 863
 864         debug("%s: %s = %s", __func__, propname, value);
 865
 866         return ofnode_write_prop(node, propname, strlen(value) + 1, value);
 867 }
 868
 869 int ofnode_set_enabled(ofnode node, bool value)
 870 {
 871         if (!of_live_active())
 872                 return -ENOSYS;
 873
 874         assert(ofnode_valid(node));
 875
 876         if (value)
 877                 return ofnode_write_string(node, "status", "okay");
 878         else
 879                 return ofnode_write_string(node, "status", "disable");
 880 }