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 unaligned_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 u64 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 void *ofnode_read_prop(ofnode node, const char *propname, int *sizep)
 105 {
 106         const char *val = NULL;
 107         int len;
 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, &len);
 115
 116                 if (prop) {
 117                         val = prop->value;
 118                         len = prop->length;
 119                 }
 120         } else {
 121                 val = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node),
 122                                   propname, &len);
 123         }
 124         if (!val) {
 125                 debug("<not found>\n");
 126                 if (sizep)
 127                         *sizep = -FDT_ERR_NOTFOUND;
 128                 return NULL;
 129         }
 130         if (sizep)
 131                 *sizep = len;
 132
 133         return val;
 134 }
 135
 136 const char *ofnode_read_string(ofnode node, const char *propname)
 137 {
 138         const char *str;
 139         int len;
 140
 141         str = ofnode_read_prop(node, propname, &len);
 142         if (!str)
 143                 return NULL;
 144
 145         if (strnlen(str, len) >= len) {
 146                 debug("<invalid>\n");
 147                 return NULL;
 148         }
 149         debug("%s\n", str);
 150
 151         return str;
 152 }
 153
 154 int ofnode_read_size(ofnode node, const char *propname)
 155 {
 156         int len;
 157
 158         if (!ofnode_read_prop(node, propname, &len))
 159                 return -EINVAL;
 160
 161         return len;
 162 }
 163
 164 ofnode ofnode_find_subnode(ofnode node, const char *subnode_name)
 165 {
 166         ofnode subnode;
 167
 168         assert(ofnode_valid(node));
 169         debug("%s: %s: ", __func__, subnode_name);
 170
 171         if (ofnode_is_np(node)) {
 172                 const struct device_node *np = ofnode_to_np(node);
 173
 174                 for (np = np->child; np; np = np->sibling) {
 175                         if (!strcmp(subnode_name, np->name))
 176                                 break;
 177                 }
 178                 subnode = np_to_ofnode(np);
 179         } else {
 180                 int ooffset = fdt_subnode_offset(gd->fdt_blob,
 181                                 ofnode_to_offset(node), subnode_name);
 182                 subnode = offset_to_ofnode(ooffset);
 183         }
 184         debug("%s\n", ofnode_valid(subnode) ?
 185               ofnode_get_name(subnode) : "<none>");
 186
 187         return subnode;
 188 }
 189
 190 int ofnode_read_u32_array(ofnode node, const char *propname,
 191                           u32 *out_values, size_t sz)
 192 {
 193         assert(ofnode_valid(node));
 194         debug("%s: %s: ", __func__, propname);
 195
 196         if (ofnode_is_np(node)) {
 197                 return of_read_u32_array(ofnode_to_np(node), propname,
 198                                          out_values, sz);
 199         } else {
 200                 return fdtdec_get_int_array(gd->fdt_blob,
 201                                             ofnode_to_offset(node), propname,
 202                                             out_values, sz);
 203         }
 204 }
 205
 206 ofnode ofnode_first_subnode(ofnode node)
 207 {
 208         assert(ofnode_valid(node));
 209         if (ofnode_is_np(node))
 210                 return np_to_ofnode(node.np->child);
 211
 212         return offset_to_ofnode(
 213                 fdt_first_subnode(gd->fdt_blob, ofnode_to_offset(node)));
 214 }
 215
 216 ofnode ofnode_next_subnode(ofnode node)
 217 {
 218         assert(ofnode_valid(node));
 219         if (ofnode_is_np(node))
 220                 return np_to_ofnode(node.np->sibling);
 221
 222         return offset_to_ofnode(
 223                 fdt_next_subnode(gd->fdt_blob, ofnode_to_offset(node)));
 224 }
 225
 226 ofnode ofnode_get_parent(ofnode node)
 227 {
 228         ofnode parent;
 229
 230         assert(ofnode_valid(node));
 231         if (ofnode_is_np(node))
 232                 parent = np_to_ofnode(of_get_parent(ofnode_to_np(node)));
 233         else
 234                 parent.of_offset = fdt_parent_offset(gd->fdt_blob,
 235                                                      ofnode_to_offset(node));
 236
 237         return parent;
 238 }
 239
 240 const char *ofnode_get_name(ofnode node)
 241 {
 242         if (!ofnode_valid(node)) {
 243                 debug("%s node not valid\n", __func__);
 244                 return NULL;
 245         }
 246
 247         if (ofnode_is_np(node))
 248                 return strrchr(node.np->full_name, '/') + 1;
 249
 250         return fdt_get_name(gd->fdt_blob, ofnode_to_offset(node), NULL);
 251 }
 252
 253 ofnode ofnode_get_by_phandle(uint phandle)
 254 {
 255         ofnode node;
 256
 257         if (of_live_active())
 258                 node = np_to_ofnode(of_find_node_by_phandle(phandle));
 259         else
 260                 node.of_offset = fdt_node_offset_by_phandle(gd->fdt_blob,
 261                                                             phandle);
 262
 263         return node;
 264 }
 265
 266 fdt_addr_t ofnode_get_addr_size_index(ofnode node, int index, fdt_size_t *size)
 267 {
 268         int na, ns;
 269
 270         if (ofnode_is_np(node)) {
 271                 const __be32 *prop_val;
 272                 u64 size64;
 273                 uint flags;
 274
 275                 prop_val = of_get_address(ofnode_to_np(node), index, &size64,
 276                                           &flags);
 277                 if (!prop_val)
 278                         return FDT_ADDR_T_NONE;
 279                 if (size)
 280                         *size = size64;
 281
 282                 ns = of_n_size_cells(ofnode_to_np(node));
 283
 284                 if (IS_ENABLED(CONFIG_OF_TRANSLATE) && ns > 0) {
 285                         return of_translate_address(ofnode_to_np(node), prop_val);
 286                 } else {
 287                         na = of_n_addr_cells(ofnode_to_np(node));
 288                         return of_read_number(prop_val, na);
 289                 }
 290         } else {
 291                 na = ofnode_read_simple_addr_cells(ofnode_get_parent(node));
 292                 ns = ofnode_read_simple_size_cells(ofnode_get_parent(node));
 293                 return fdtdec_get_addr_size_fixed(gd->fdt_blob,
 294                                                   ofnode_to_offset(node), "reg",
 295                                                   index, na, ns, size, true);
 296         }
 297
 298         return FDT_ADDR_T_NONE;
 299 }
 300
 301 fdt_addr_t ofnode_get_addr_index(ofnode node, int index)
 302 {
 303         fdt_size_t size;
 304
 305         return ofnode_get_addr_size_index(node, index, &size);
 306 }
 307
 308 fdt_addr_t ofnode_get_addr(ofnode node)
 309 {
 310         return ofnode_get_addr_index(node, 0);
 311 }
 312
 313 int ofnode_stringlist_search(ofnode node, const char *property,
 314                              const char *string)
 315 {
 316         if (ofnode_is_np(node)) {
 317                 return of_property_match_string(ofnode_to_np(node),
 318                                                 property, string);
 319         } else {
 320                 int ret;
 321
 322                 ret = fdt_stringlist_search(gd->fdt_blob,
 323                                             ofnode_to_offset(node), property,
 324                                             string);
 325                 if (ret == -FDT_ERR_NOTFOUND)
 326                         return -ENODATA;
 327                 else if (ret < 0)
 328                         return -EINVAL;
 329
 330                 return ret;
 331         }
 332 }
 333
 334 int ofnode_read_string_index(ofnode node, const char *property, int index,
 335                              const char **outp)
 336 {
 337         if (ofnode_is_np(node)) {
 338                 return of_property_read_string_index(ofnode_to_np(node),
 339                                                      property, index, outp);
 340         } else {
 341                 int len;
 342
 343                 *outp = fdt_stringlist_get(gd->fdt_blob, ofnode_to_offset(node),
 344                                            property, index, &len);
 345                 if (len < 0)
 346                         return -EINVAL;
 347                 return 0;
 348         }
 349 }
 350
 351 int ofnode_read_string_count(ofnode node, const char *property)
 352 {
 353         if (ofnode_is_np(node)) {
 354                 return of_property_count_strings(ofnode_to_np(node), property);
 355         } else {
 356                 return fdt_stringlist_count(gd->fdt_blob,
 357                                             ofnode_to_offset(node), property);
 358         }
 359 }
 360
 361 static void ofnode_from_fdtdec_phandle_args(struct fdtdec_phandle_args *in,
 362                                             struct ofnode_phandle_args *out)
 363 {
 364         assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS);
 365         out->node = offset_to_ofnode(in->node);
 366         out->args_count = in->args_count;
 367         memcpy(out->args, in->args, sizeof(out->args));
 368 }
 369
 370 static void ofnode_from_of_phandle_args(struct of_phandle_args *in,
 371                                         struct ofnode_phandle_args *out)
 372 {
 373         assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS);
 374         out->node = np_to_ofnode(in->np);
 375         out->args_count = in->args_count;
 376         memcpy(out->args, in->args, sizeof(out->args));
 377 }
 378
 379 int ofnode_parse_phandle_with_args(ofnode node, const char *list_name,
 380                                    const char *cells_name, int cell_count,
 381                                    int index,
 382                                    struct ofnode_phandle_args *out_args)
 383 {
 384         if (ofnode_is_np(node)) {
 385                 struct of_phandle_args args;
 386                 int ret;
 387
 388                 ret = of_parse_phandle_with_args(ofnode_to_np(node),
 389                                                  list_name, cells_name, index,
 390                                                  &args);
 391                 if (ret)
 392                         return ret;
 393                 ofnode_from_of_phandle_args(&args, out_args);
 394         } else {
 395                 struct fdtdec_phandle_args args;
 396                 int ret;
 397
 398                 ret = fdtdec_parse_phandle_with_args(gd->fdt_blob,
 399                                                      ofnode_to_offset(node),
 400                                                      list_name, cells_name,
 401                                                      cell_count, index, &args);
 402                 if (ret)
 403                         return ret;
 404                 ofnode_from_fdtdec_phandle_args(&args, out_args);
 405         }
 406
 407         return 0;
 408 }
 409
 410 int ofnode_count_phandle_with_args(ofnode node, const char *list_name,
 411                                    const char *cells_name)
 412 {
 413         if (ofnode_is_np(node))
 414                 return of_count_phandle_with_args(ofnode_to_np(node),
 415                                 list_name, cells_name);
 416         else
 417                 return fdtdec_parse_phandle_with_args(gd->fdt_blob,
 418                                 ofnode_to_offset(node), list_name, cells_name,
 419                                 0, -1, NULL);
 420 }
 421
 422 ofnode ofnode_path(const char *path)
 423 {
 424         if (of_live_active())
 425                 return np_to_ofnode(of_find_node_by_path(path));
 426         else
 427                 return offset_to_ofnode(fdt_path_offset(gd->fdt_blob, path));
 428 }
 429
 430 const void *ofnode_read_chosen_prop(const char *propname, int *sizep)
 431 {
 432         ofnode chosen_node;
 433
 434         chosen_node = ofnode_path("/chosen");
 435
 436         return ofnode_read_prop(chosen_node, propname, sizep);
 437 }
 438
 439 const char *ofnode_read_chosen_string(const char *propname)
 440 {
 441         return ofnode_read_chosen_prop(propname, NULL);
 442 }
 443
 444 ofnode ofnode_get_chosen_node(const char *name)
 445 {
 446         const char *prop;
 447
 448         prop = ofnode_read_chosen_prop(name, NULL);
 449         if (!prop)
 450                 return ofnode_null();
 451
 452         return ofnode_path(prop);
 453 }
 454
 455 static int decode_timing_property(ofnode node, const char *name,
 456                                   struct timing_entry *result)
 457 {
 458         int length, ret = 0;
 459
 460         length = ofnode_read_size(node, name);
 461         if (length < 0) {
 462                 debug("%s: could not find property %s\n",
 463                       ofnode_get_name(node), name);
 464                 return length;
 465         }
 466
 467         if (length == sizeof(u32)) {
 468                 result->typ = ofnode_read_u32_default(node, name, 0);
 469                 result->min = result->typ;
 470                 result->max = result->typ;
 471         } else {
 472                 ret = ofnode_read_u32_array(node, name, &result->min, 3);
 473         }
 474
 475         return ret;
 476 }
 477
 478 int ofnode_decode_display_timing(ofnode parent, int index,
 479                                  struct display_timing *dt)
 480 {
 481         int i;
 482         ofnode timings, node;
 483         u32 val = 0;
 484         int ret = 0;
 485
 486         timings = ofnode_find_subnode(parent, "display-timings");
 487         if (!ofnode_valid(timings))
 488                 return -EINVAL;
 489
 490         i = 0;
 491         ofnode_for_each_subnode(node, timings) {
 492                 if (i++ == index)
 493                         break;
 494         }
 495
 496         if (!ofnode_valid(node))
 497                 return -EINVAL;
 498
 499         memset(dt, 0, sizeof(*dt));
 500
 501         ret |= decode_timing_property(node, "hback-porch", &dt->hback_porch);
 502         ret |= decode_timing_property(node, "hfront-porch", &dt->hfront_porch);
 503         ret |= decode_timing_property(node, "hactive", &dt->hactive);
 504         ret |= decode_timing_property(node, "hsync-len", &dt->hsync_len);
 505         ret |= decode_timing_property(node, "vback-porch", &dt->vback_porch);
 506         ret |= decode_timing_property(node, "vfront-porch", &dt->vfront_porch);
 507         ret |= decode_timing_property(node, "vactive", &dt->vactive);
 508         ret |= decode_timing_property(node, "vsync-len", &dt->vsync_len);
 509         ret |= decode_timing_property(node, "clock-frequency", &dt->pixelclock);
 510
 511         dt->flags = 0;
 512         val = ofnode_read_u32_default(node, "vsync-active", -1);
 513         if (val != -1) {
 514                 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
 515                                 DISPLAY_FLAGS_VSYNC_LOW;
 516         }
 517         val = ofnode_read_u32_default(node, "hsync-active", -1);
 518         if (val != -1) {
 519                 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
 520                                 DISPLAY_FLAGS_HSYNC_LOW;
 521         }
 522         val = ofnode_read_u32_default(node, "de-active", -1);
 523         if (val != -1) {
 524                 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
 525                                 DISPLAY_FLAGS_DE_LOW;
 526         }
 527         val = ofnode_read_u32_default(node, "pixelclk-active", -1);
 528         if (val != -1) {
 529                 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
 530                                 DISPLAY_FLAGS_PIXDATA_NEGEDGE;
 531         }
 532
 533         if (ofnode_read_bool(node, "interlaced"))
 534                 dt->flags |= DISPLAY_FLAGS_INTERLACED;
 535         if (ofnode_read_bool(node, "doublescan"))
 536                 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
 537         if (ofnode_read_bool(node, "doubleclk"))
 538                 dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
 539
 540         return ret;
 541 }
 542
 543 const void *ofnode_get_property(ofnode node, const char *propname, int *lenp)
 544 {
 545         if (ofnode_is_np(node))
 546                 return of_get_property(ofnode_to_np(node), propname, lenp);
 547         else
 548                 return fdt_getprop(gd->fdt_blob, ofnode_to_offset(node),
 549                                    propname, lenp);
 550 }
 551
 552 bool ofnode_is_available(ofnode node)
 553 {
 554         if (ofnode_is_np(node))
 555                 return of_device_is_available(ofnode_to_np(node));
 556         else
 557                 return fdtdec_get_is_enabled(gd->fdt_blob,
 558                                              ofnode_to_offset(node));
 559 }
 560
 561 fdt_addr_t ofnode_get_addr_size(ofnode node, const char *property,
 562                                 fdt_size_t *sizep)
 563 {
 564         if (ofnode_is_np(node)) {
 565                 int na, ns;
 566                 int psize;
 567                 const struct device_node *np = ofnode_to_np(node);
 568                 const __be32 *prop = of_get_property(np, property, &psize);
 569
 570                 if (!prop)
 571                         return FDT_ADDR_T_NONE;
 572                 na = of_n_addr_cells(np);
 573                 ns = of_n_size_cells(np);
 574                 *sizep = of_read_number(prop + na, ns);
 575
 576                 if (CONFIG_IS_ENABLED(OF_TRANSLATE) && ns > 0)
 577                         return of_translate_address(np, prop);
 578                 else
 579                         return of_read_number(prop, na);
 580         } else {
 581                 return fdtdec_get_addr_size(gd->fdt_blob,
 582                                             ofnode_to_offset(node), property,
 583                                             sizep);
 584         }
 585 }
 586
 587 const uint8_t *ofnode_read_u8_array_ptr(ofnode node, const char *propname,
 588                                         size_t sz)
 589 {
 590         if (ofnode_is_np(node)) {
 591                 const struct device_node *np = ofnode_to_np(node);
 592                 int psize;
 593                 const __be32 *prop = of_get_property(np, propname, &psize);
 594
 595                 if (!prop || sz != psize)
 596                         return NULL;
 597                 return (uint8_t *)prop;
 598
 599         } else {
 600                 return fdtdec_locate_byte_array(gd->fdt_blob,
 601                                 ofnode_to_offset(node), propname, sz);
 602         }
 603 }
 604
 605 int ofnode_read_pci_addr(ofnode node, enum fdt_pci_space type,
 606                          const char *propname, struct fdt_pci_addr *addr)
 607 {
 608         const fdt32_t *cell;
 609         int len;
 610         int ret = -ENOENT;
 611
 612         debug("%s: %s: ", __func__, propname);
 613
 614         /*
 615          * If we follow the pci bus bindings strictly, we should check
 616          * the value of the node's parent node's #address-cells and
 617          * #size-cells. They need to be 3 and 2 accordingly. However,
 618          * for simplicity we skip the check here.
 619          */
 620         cell = ofnode_get_property(node, propname, &len);
 621         if (!cell)
 622                 goto fail;
 623
 624         if ((len % FDT_PCI_REG_SIZE) == 0) {
 625                 int num = len / FDT_PCI_REG_SIZE;
 626                 int i;
 627
 628                 for (i = 0; i < num; i++) {
 629                         debug("pci address #%d: %08lx %08lx %08lx\n", i,
 630                               (ulong)fdt32_to_cpu(cell[0]),
 631                               (ulong)fdt32_to_cpu(cell[1]),
 632                               (ulong)fdt32_to_cpu(cell[2]));
 633                         if ((fdt32_to_cpu(*cell) & type) == type) {
 634                                 addr->phys_hi = fdt32_to_cpu(cell[0]);
 635                                 addr->phys_mid = fdt32_to_cpu(cell[1]);
 636                                 addr->phys_lo = fdt32_to_cpu(cell[2]);
 637                                 break;
 638                         }
 639
 640                         cell += (FDT_PCI_ADDR_CELLS +
 641                                  FDT_PCI_SIZE_CELLS);
 642                 }
 643
 644                 if (i == num) {
 645                         ret = -ENXIO;
 646                         goto fail;
 647                 }
 648
 649                 return 0;
 650         }
 651
 652         ret = -EINVAL;
 653
 654 fail:
 655         debug("(not found)\n");
 656         return ret;
 657 }
 658
 659 int ofnode_read_pci_vendev(ofnode node, u16 *vendor, u16 *device)
 660 {
 661         const char *list, *end;
 662         int len;
 663
 664         list = ofnode_get_property(node, "compatible", &len);
 665         if (!list)
 666                 return -ENOENT;
 667
 668         end = list + len;
 669         while (list < end) {
 670                 len = strlen(list);
 671                 if (len >= strlen("pciVVVV,DDDD")) {
 672                         char *s = strstr(list, "pci");
 673
 674                         /*
 675                          * check if the string is something like pciVVVV,DDDD.RR
 676                          * or just pciVVVV,DDDD
 677                          */
 678                         if (s && s[7] == ',' &&
 679                             (s[12] == '.' || s[12] == 0)) {
 680                                 s += 3;
 681                                 *vendor = simple_strtol(s, NULL, 16);
 682
 683                                 s += 5;
 684                                 *device = simple_strtol(s, NULL, 16);
 685
 686                                 return 0;
 687                         }
 688                 }
 689                 list += (len + 1);
 690         }
 691
 692         return -ENOENT;
 693 }
 694
 695 int ofnode_read_addr_cells(ofnode node)
 696 {
 697         if (ofnode_is_np(node))
 698                 return of_n_addr_cells(ofnode_to_np(node));
 699         else  /* NOTE: this call should walk up the parent stack */
 700                 return fdt_address_cells(gd->fdt_blob, ofnode_to_offset(node));
 701 }
 702
 703 int ofnode_read_size_cells(ofnode node)
 704 {
 705         if (ofnode_is_np(node))
 706                 return of_n_size_cells(ofnode_to_np(node));
 707         else  /* NOTE: this call should walk up the parent stack */
 708                 return fdt_size_cells(gd->fdt_blob, ofnode_to_offset(node));
 709 }
 710
 711 int ofnode_read_simple_addr_cells(ofnode node)
 712 {
 713         if (ofnode_is_np(node))
 714                 return of_simple_addr_cells(ofnode_to_np(node));
 715         else
 716                 return fdt_address_cells(gd->fdt_blob, ofnode_to_offset(node));
 717 }
 718
 719 int ofnode_read_simple_size_cells(ofnode node)
 720 {
 721         if (ofnode_is_np(node))
 722                 return of_simple_size_cells(ofnode_to_np(node));
 723         else
 724                 return fdt_size_cells(gd->fdt_blob, ofnode_to_offset(node));
 725 }
 726
 727 bool ofnode_pre_reloc(ofnode node)
 728 {
 729 #if defined(CONFIG_SPL_BUILD) || defined(CONFIG_TPL_BUILD)
 730         /* for SPL and TPL the remaining nodes after the fdtgrep 1st pass
 731          * had property dm-pre-reloc or u-boot,dm-spl/tpl.
 732          * They are removed in final dtb (fdtgrep 2nd pass)
 733          */
 734         return true;
 735 #else
 736         if (ofnode_read_bool(node, "u-boot,dm-pre-reloc"))
 737                 return true;
 738         if (ofnode_read_bool(node, "u-boot,dm-pre-proper"))
 739                 return true;
 740
 741         /*
 742          * In regular builds individual spl and tpl handling both
 743          * count as handled pre-relocation for later second init.
 744          */
 745         if (ofnode_read_bool(node, "u-boot,dm-spl") ||
 746             ofnode_read_bool(node, "u-boot,dm-tpl"))
 747                 return true;
 748
 749         return false;
 750 #endif
 751 }
 752
 753 int ofnode_read_resource(ofnode node, uint index, struct resource *res)
 754 {
 755         if (ofnode_is_np(node)) {
 756                 return of_address_to_resource(ofnode_to_np(node), index, res);
 757         } else {
 758                 struct fdt_resource fres;
 759                 int ret;
 760
 761                 ret = fdt_get_resource(gd->fdt_blob, ofnode_to_offset(node),
 762                                        "reg", index, &fres);
 763                 if (ret < 0)
 764                         return -EINVAL;
 765                 memset(res, '\0', sizeof(*res));
 766                 res->start = fres.start;
 767                 res->end = fres.end;
 768
 769                 return 0;
 770         }
 771 }
 772
 773 int ofnode_read_resource_byname(ofnode node, const char *name,
 774                                 struct resource *res)
 775 {
 776         int index;
 777
 778         index = ofnode_stringlist_search(node, "reg-names", name);
 779         if (index < 0)
 780                 return index;
 781
 782         return ofnode_read_resource(node, index, res);
 783 }
 784
 785 u64 ofnode_translate_address(ofnode node, const fdt32_t *in_addr)
 786 {
 787         if (ofnode_is_np(node))
 788                 return of_translate_address(ofnode_to_np(node), in_addr);
 789         else
 790                 return fdt_translate_address(gd->fdt_blob, ofnode_to_offset(node), in_addr);
 791 }
 792
 793 u64 ofnode_translate_dma_address(ofnode node, const fdt32_t *in_addr)
 794 {
 795         if (ofnode_is_np(node))
 796                 return of_translate_dma_address(ofnode_to_np(node), in_addr);
 797         else
 798                 return fdt_translate_dma_address(gd->fdt_blob, ofnode_to_offset(node), in_addr);
 799 }
 800
 801 int ofnode_device_is_compatible(ofnode node, const char *compat)
 802 {
 803         if (ofnode_is_np(node))
 804                 return of_device_is_compatible(ofnode_to_np(node), compat,
 805                                                NULL, NULL);
 806         else
 807                 return !fdt_node_check_compatible(gd->fdt_blob,
 808                                                   ofnode_to_offset(node),
 809                                                   compat);
 810 }
 811
 812 ofnode ofnode_by_compatible(ofnode from, const char *compat)
 813 {
 814         if (of_live_active()) {
 815                 return np_to_ofnode(of_find_compatible_node(
 816                         (struct device_node *)ofnode_to_np(from), NULL,
 817                         compat));
 818         } else {
 819                 return offset_to_ofnode(fdt_node_offset_by_compatible(
 820                                 gd->fdt_blob, ofnode_to_offset(from), compat));
 821         }
 822 }
 823
 824 ofnode ofnode_by_prop_value(ofnode from, const char *propname,
 825                             const void *propval, int proplen)
 826 {
 827         if (of_live_active()) {
 828                 return np_to_ofnode(of_find_node_by_prop_value(
 829                         (struct device_node *)ofnode_to_np(from), propname,
 830                         propval, proplen));
 831         } else {
 832                 return offset_to_ofnode(fdt_node_offset_by_prop_value(
 833                                 gd->fdt_blob, ofnode_to_offset(from),
 834                                 propname, propval, proplen));
 835         }
 836 }
 837
 838 int ofnode_write_prop(ofnode node, const char *propname, int len,
 839                       const void *value)
 840 {
 841         const struct device_node *np = ofnode_to_np(node);
 842         struct property *pp;
 843         struct property *pp_last = NULL;
 844         struct property *new;
 845
 846         if (!of_live_active())
 847                 return -ENOSYS;
 848
 849         if (!np)
 850                 return -EINVAL;
 851
 852         for (pp = np->properties; pp; pp = pp->next) {
 853                 if (strcmp(pp->name, propname) == 0) {
 854                         /* Property exists -> change value */
 855                         pp->value = (void *)value;
 856                         pp->length = len;
 857                         return 0;
 858                 }
 859                 pp_last = pp;
 860         }
 861
 862         if (!pp_last)
 863                 return -ENOENT;
 864
 865         /* Property does not exist -> append new property */
 866         new = malloc(sizeof(struct property));
 867         if (!new)
 868                 return -ENOMEM;
 869
 870         new->name = strdup(propname);
 871         if (!new->name) {
 872                 free(new);
 873                 return -ENOMEM;
 874         }
 875
 876         new->value = (void *)value;
 877         new->length = len;
 878         new->next = NULL;
 879
 880         pp_last->next = new;
 881
 882         return 0;
 883 }
 884
 885 int ofnode_write_string(ofnode node, const char *propname, const char *value)
 886 {
 887         if (!of_live_active())
 888                 return -ENOSYS;
 889
 890         assert(ofnode_valid(node));
 891
 892         debug("%s: %s = %s", __func__, propname, value);
 893
 894         return ofnode_write_prop(node, propname, strlen(value) + 1, value);
 895 }
 896
 897 int ofnode_set_enabled(ofnode node, bool value)
 898 {
 899         if (!of_live_active())
 900                 return -ENOSYS;
 901
 902         assert(ofnode_valid(node));
 903
 904         if (value)
 905                 return ofnode_write_string(node, "status", "okay");
 906         else
 907                 return ofnode_write_string(node, "status", "disabled");
 908 }