1 /* 2 * Copyright (c) 2011 The Chromium OS Authors. 3 * SPDX-License-Identifier: GPL-2.0+ 4 */ 5 6 #ifndef USE_HOSTCC 7 #include <common.h> 8 #include <serial.h> 9 #include <libfdt.h> 10 #include <fdtdec.h> 11 12 #include <asm/gpio.h> 13 14 DECLARE_GLOBAL_DATA_PTR; 15 16 /* 17 * Here are the type we know about. One day we might allow drivers to 18 * register. For now we just put them here. The COMPAT macro allows us to 19 * turn this into a sparse list later, and keeps the ID with the name. 20 */ 21 #define COMPAT(id, name) name 22 static const char * const compat_names[COMPAT_COUNT] = { 23 COMPAT(UNKNOWN, "<none>"), 24 COMPAT(NVIDIA_TEGRA20_USB, "nvidia,tegra20-ehci"), 25 COMPAT(NVIDIA_TEGRA30_USB, "nvidia,tegra30-ehci"), 26 COMPAT(NVIDIA_TEGRA114_USB, "nvidia,tegra114-ehci"), 27 COMPAT(NVIDIA_TEGRA114_I2C, "nvidia,tegra114-i2c"), 28 COMPAT(NVIDIA_TEGRA20_I2C, "nvidia,tegra20-i2c"), 29 COMPAT(NVIDIA_TEGRA20_DVC, "nvidia,tegra20-i2c-dvc"), 30 COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"), 31 COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"), 32 COMPAT(NVIDIA_TEGRA20_KBC, "nvidia,tegra20-kbc"), 33 COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"), 34 COMPAT(NVIDIA_TEGRA20_PWM, "nvidia,tegra20-pwm"), 35 COMPAT(NVIDIA_TEGRA20_DC, "nvidia,tegra20-dc"), 36 COMPAT(NVIDIA_TEGRA124_SDMMC, "nvidia,tegra124-sdhci"), 37 COMPAT(NVIDIA_TEGRA30_SDMMC, "nvidia,tegra30-sdhci"), 38 COMPAT(NVIDIA_TEGRA20_SDMMC, "nvidia,tegra20-sdhci"), 39 COMPAT(NVIDIA_TEGRA20_SFLASH, "nvidia,tegra20-sflash"), 40 COMPAT(NVIDIA_TEGRA20_SLINK, "nvidia,tegra20-slink"), 41 COMPAT(NVIDIA_TEGRA114_SPI, "nvidia,tegra114-spi"), 42 COMPAT(SMSC_LAN9215, "smsc,lan9215"), 43 COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"), 44 COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"), 45 COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"), 46 COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"), 47 COMPAT(SAMSUNG_EXYNOS_SPI, "samsung,exynos-spi"), 48 COMPAT(GOOGLE_CROS_EC, "google,cros-ec"), 49 COMPAT(GOOGLE_CROS_EC_KEYB, "google,cros-ec-keyb"), 50 COMPAT(SAMSUNG_EXYNOS_EHCI, "samsung,exynos-ehci"), 51 COMPAT(SAMSUNG_EXYNOS5_XHCI, "samsung,exynos5250-xhci"), 52 COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"), 53 COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"), 54 COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"), 55 COMPAT(SAMSUNG_EXYNOS_FIMD, "samsung,exynos-fimd"), 56 COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"), 57 COMPAT(SAMSUNG_EXYNOS5_DP, "samsung,exynos5-dp"), 58 COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"), 59 COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"), 60 COMPAT(SAMSUNG_EXYNOS_SERIAL, "samsung,exynos4210-uart"), 61 COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686_pmic"), 62 COMPAT(GENERIC_SPI_FLASH, "spi-flash"), 63 COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"), 64 COMPAT(INFINEON_SLB9635_TPM, "infineon,slb9635-tpm"), 65 COMPAT(INFINEON_SLB9645_TPM, "infineon,slb9645-tpm"), 66 COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"), 67 COMPAT(SANDBOX_HOST_EMULATION, "sandbox,host-emulation"), 68 COMPAT(SANDBOX_LCD_SDL, "sandbox,lcd-sdl"), 69 COMPAT(TI_TPS65090, "ti,tps65090"), 70 COMPAT(COMPAT_NXP_PTN3460, "nxp,ptn3460"), 71 }; 72 73 const char *fdtdec_get_compatible(enum fdt_compat_id id) 74 { 75 /* We allow reading of the 'unknown' ID for testing purposes */ 76 assert(id >= 0 && id < COMPAT_COUNT); 77 return compat_names[id]; 78 } 79 80 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node, 81 const char *prop_name, fdt_size_t *sizep) 82 { 83 const fdt_addr_t *cell; 84 int len; 85 86 debug("%s: %s: ", __func__, prop_name); 87 cell = fdt_getprop(blob, node, prop_name, &len); 88 if (cell && ((!sizep && len == sizeof(fdt_addr_t)) || 89 len == sizeof(fdt_addr_t) * 2)) { 90 fdt_addr_t addr = fdt_addr_to_cpu(*cell); 91 if (sizep) { 92 const fdt_size_t *size; 93 94 size = (fdt_size_t *)((char *)cell + 95 sizeof(fdt_addr_t)); 96 *sizep = fdt_size_to_cpu(*size); 97 debug("addr=%08lx, size=%08x\n", 98 (ulong)addr, *sizep); 99 } else { 100 debug("%08lx\n", (ulong)addr); 101 } 102 return addr; 103 } 104 debug("(not found)\n"); 105 return FDT_ADDR_T_NONE; 106 } 107 108 fdt_addr_t fdtdec_get_addr(const void *blob, int node, 109 const char *prop_name) 110 { 111 return fdtdec_get_addr_size(blob, node, prop_name, NULL); 112 } 113 114 s32 fdtdec_get_int(const void *blob, int node, const char *prop_name, 115 s32 default_val) 116 { 117 const s32 *cell; 118 int len; 119 120 debug("%s: %s: ", __func__, prop_name); 121 cell = fdt_getprop(blob, node, prop_name, &len); 122 if (cell && len >= sizeof(s32)) { 123 s32 val = fdt32_to_cpu(cell[0]); 124 125 debug("%#x (%d)\n", val, val); 126 return val; 127 } 128 debug("(not found)\n"); 129 return default_val; 130 } 131 132 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name, 133 uint64_t default_val) 134 { 135 const uint64_t *cell64; 136 int length; 137 138 cell64 = fdt_getprop(blob, node, prop_name, &length); 139 if (!cell64 || length < sizeof(*cell64)) 140 return default_val; 141 142 return fdt64_to_cpu(*cell64); 143 } 144 145 int fdtdec_get_is_enabled(const void *blob, int node) 146 { 147 const char *cell; 148 149 /* 150 * It should say "okay", so only allow that. Some fdts use "ok" but 151 * this is a bug. Please fix your device tree source file. See here 152 * for discussion: 153 * 154 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html 155 */ 156 cell = fdt_getprop(blob, node, "status", NULL); 157 if (cell) 158 return 0 == strcmp(cell, "okay"); 159 return 1; 160 } 161 162 enum fdt_compat_id fdtdec_lookup(const void *blob, int node) 163 { 164 enum fdt_compat_id id; 165 166 /* Search our drivers */ 167 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++) 168 if (0 == fdt_node_check_compatible(blob, node, 169 compat_names[id])) 170 return id; 171 return COMPAT_UNKNOWN; 172 } 173 174 int fdtdec_next_compatible(const void *blob, int node, 175 enum fdt_compat_id id) 176 { 177 return fdt_node_offset_by_compatible(blob, node, compat_names[id]); 178 } 179 180 int fdtdec_next_compatible_subnode(const void *blob, int node, 181 enum fdt_compat_id id, int *depthp) 182 { 183 do { 184 node = fdt_next_node(blob, node, depthp); 185 } while (*depthp > 1); 186 187 /* If this is a direct subnode, and compatible, return it */ 188 if (*depthp == 1 && 0 == fdt_node_check_compatible( 189 blob, node, compat_names[id])) 190 return node; 191 192 return -FDT_ERR_NOTFOUND; 193 } 194 195 int fdtdec_next_alias(const void *blob, const char *name, 196 enum fdt_compat_id id, int *upto) 197 { 198 #define MAX_STR_LEN 20 199 char str[MAX_STR_LEN + 20]; 200 int node, err; 201 202 /* snprintf() is not available */ 203 assert(strlen(name) < MAX_STR_LEN); 204 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto); 205 node = fdt_path_offset(blob, str); 206 if (node < 0) 207 return node; 208 err = fdt_node_check_compatible(blob, node, compat_names[id]); 209 if (err < 0) 210 return err; 211 if (err) 212 return -FDT_ERR_NOTFOUND; 213 (*upto)++; 214 return node; 215 } 216 217 int fdtdec_find_aliases_for_id(const void *blob, const char *name, 218 enum fdt_compat_id id, int *node_list, int maxcount) 219 { 220 memset(node_list, '\0', sizeof(*node_list) * maxcount); 221 222 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount); 223 } 224 225 /* TODO: Can we tighten this code up a little? */ 226 int fdtdec_add_aliases_for_id(const void *blob, const char *name, 227 enum fdt_compat_id id, int *node_list, int maxcount) 228 { 229 int name_len = strlen(name); 230 int nodes[maxcount]; 231 int num_found = 0; 232 int offset, node; 233 int alias_node; 234 int count; 235 int i, j; 236 237 /* find the alias node if present */ 238 alias_node = fdt_path_offset(blob, "/aliases"); 239 240 /* 241 * start with nothing, and we can assume that the root node can't 242 * match 243 */ 244 memset(nodes, '\0', sizeof(nodes)); 245 246 /* First find all the compatible nodes */ 247 for (node = count = 0; node >= 0 && count < maxcount;) { 248 node = fdtdec_next_compatible(blob, node, id); 249 if (node >= 0) 250 nodes[count++] = node; 251 } 252 if (node >= 0) 253 debug("%s: warning: maxcount exceeded with alias '%s'\n", 254 __func__, name); 255 256 /* Now find all the aliases */ 257 for (offset = fdt_first_property_offset(blob, alias_node); 258 offset > 0; 259 offset = fdt_next_property_offset(blob, offset)) { 260 const struct fdt_property *prop; 261 const char *path; 262 int number; 263 int found; 264 265 node = 0; 266 prop = fdt_get_property_by_offset(blob, offset, NULL); 267 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); 268 if (prop->len && 0 == strncmp(path, name, name_len)) 269 node = fdt_path_offset(blob, prop->data); 270 if (node <= 0) 271 continue; 272 273 /* Get the alias number */ 274 number = simple_strtoul(path + name_len, NULL, 10); 275 if (number < 0 || number >= maxcount) { 276 debug("%s: warning: alias '%s' is out of range\n", 277 __func__, path); 278 continue; 279 } 280 281 /* Make sure the node we found is actually in our list! */ 282 found = -1; 283 for (j = 0; j < count; j++) 284 if (nodes[j] == node) { 285 found = j; 286 break; 287 } 288 289 if (found == -1) { 290 debug("%s: warning: alias '%s' points to a node " 291 "'%s' that is missing or is not compatible " 292 " with '%s'\n", __func__, path, 293 fdt_get_name(blob, node, NULL), 294 compat_names[id]); 295 continue; 296 } 297 298 /* 299 * Add this node to our list in the right place, and mark 300 * it as done. 301 */ 302 if (fdtdec_get_is_enabled(blob, node)) { 303 if (node_list[number]) { 304 debug("%s: warning: alias '%s' requires that " 305 "a node be placed in the list in a " 306 "position which is already filled by " 307 "node '%s'\n", __func__, path, 308 fdt_get_name(blob, node, NULL)); 309 continue; 310 } 311 node_list[number] = node; 312 if (number >= num_found) 313 num_found = number + 1; 314 } 315 nodes[found] = 0; 316 } 317 318 /* Add any nodes not mentioned by an alias */ 319 for (i = j = 0; i < maxcount; i++) { 320 if (!node_list[i]) { 321 for (; j < maxcount; j++) 322 if (nodes[j] && 323 fdtdec_get_is_enabled(blob, nodes[j])) 324 break; 325 326 /* Have we run out of nodes to add? */ 327 if (j == maxcount) 328 break; 329 330 assert(!node_list[i]); 331 node_list[i] = nodes[j++]; 332 if (i >= num_found) 333 num_found = i + 1; 334 } 335 } 336 337 return num_found; 338 } 339 340 int fdtdec_check_fdt(void) 341 { 342 /* 343 * We must have an FDT, but we cannot panic() yet since the console 344 * is not ready. So for now, just assert(). Boards which need an early 345 * FDT (prior to console ready) will need to make their own 346 * arrangements and do their own checks. 347 */ 348 assert(!fdtdec_prepare_fdt()); 349 return 0; 350 } 351 352 /* 353 * This function is a little odd in that it accesses global data. At some 354 * point if the architecture board.c files merge this will make more sense. 355 * Even now, it is common code. 356 */ 357 int fdtdec_prepare_fdt(void) 358 { 359 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) || 360 fdt_check_header(gd->fdt_blob)) { 361 printf("No valid FDT found - please append one to U-Boot " 362 "binary, use u-boot-dtb.bin or define " 363 "CONFIG_OF_EMBED. For sandbox, use -d <file.dtb>\n"); 364 return -1; 365 } 366 return 0; 367 } 368 369 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name) 370 { 371 const u32 *phandle; 372 int lookup; 373 374 debug("%s: %s\n", __func__, prop_name); 375 phandle = fdt_getprop(blob, node, prop_name, NULL); 376 if (!phandle) 377 return -FDT_ERR_NOTFOUND; 378 379 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle)); 380 return lookup; 381 } 382 383 /** 384 * Look up a property in a node and check that it has a minimum length. 385 * 386 * @param blob FDT blob 387 * @param node node to examine 388 * @param prop_name name of property to find 389 * @param min_len minimum property length in bytes 390 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not 391 found, or -FDT_ERR_BADLAYOUT if not enough data 392 * @return pointer to cell, which is only valid if err == 0 393 */ 394 static const void *get_prop_check_min_len(const void *blob, int node, 395 const char *prop_name, int min_len, int *err) 396 { 397 const void *cell; 398 int len; 399 400 debug("%s: %s\n", __func__, prop_name); 401 cell = fdt_getprop(blob, node, prop_name, &len); 402 if (!cell) 403 *err = -FDT_ERR_NOTFOUND; 404 else if (len < min_len) 405 *err = -FDT_ERR_BADLAYOUT; 406 else 407 *err = 0; 408 return cell; 409 } 410 411 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name, 412 u32 *array, int count) 413 { 414 const u32 *cell; 415 int i, err = 0; 416 417 debug("%s: %s\n", __func__, prop_name); 418 cell = get_prop_check_min_len(blob, node, prop_name, 419 sizeof(u32) * count, &err); 420 if (!err) { 421 for (i = 0; i < count; i++) 422 array[i] = fdt32_to_cpu(cell[i]); 423 } 424 return err; 425 } 426 427 const u32 *fdtdec_locate_array(const void *blob, int node, 428 const char *prop_name, int count) 429 { 430 const u32 *cell; 431 int err; 432 433 cell = get_prop_check_min_len(blob, node, prop_name, 434 sizeof(u32) * count, &err); 435 return err ? NULL : cell; 436 } 437 438 int fdtdec_get_bool(const void *blob, int node, const char *prop_name) 439 { 440 const s32 *cell; 441 int len; 442 443 debug("%s: %s\n", __func__, prop_name); 444 cell = fdt_getprop(blob, node, prop_name, &len); 445 return cell != NULL; 446 } 447 448 /** 449 * Decode a list of GPIOs from an FDT. This creates a list of GPIOs with no 450 * terminating item. 451 * 452 * @param blob FDT blob to use 453 * @param node Node to look at 454 * @param prop_name Node property name 455 * @param gpio Array of gpio elements to fill from FDT. This will be 456 * untouched if either 0 or an error is returned 457 * @param max_count Maximum number of elements allowed 458 * @return number of GPIOs read if ok, -FDT_ERR_BADLAYOUT if max_count would 459 * be exceeded, or -FDT_ERR_NOTFOUND if the property is missing. 460 */ 461 int fdtdec_decode_gpios(const void *blob, int node, const char *prop_name, 462 struct fdt_gpio_state *gpio, int max_count) 463 { 464 const struct fdt_property *prop; 465 const u32 *cell; 466 const char *name; 467 int len, i; 468 469 debug("%s: %s\n", __func__, prop_name); 470 assert(max_count > 0); 471 prop = fdt_get_property(blob, node, prop_name, &len); 472 if (!prop) { 473 debug("%s: property '%s' missing\n", __func__, prop_name); 474 return -FDT_ERR_NOTFOUND; 475 } 476 477 /* We will use the name to tag the GPIO */ 478 name = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); 479 cell = (u32 *)prop->data; 480 len /= sizeof(u32) * 3; /* 3 cells per GPIO record */ 481 if (len > max_count) { 482 debug(" %s: too many GPIOs / cells for " 483 "property '%s'\n", __func__, prop_name); 484 return -FDT_ERR_BADLAYOUT; 485 } 486 487 /* Read out the GPIO data from the cells */ 488 for (i = 0; i < len; i++, cell += 3) { 489 gpio[i].gpio = fdt32_to_cpu(cell[1]); 490 gpio[i].flags = fdt32_to_cpu(cell[2]); 491 gpio[i].name = name; 492 } 493 494 return len; 495 } 496 497 int fdtdec_decode_gpio(const void *blob, int node, const char *prop_name, 498 struct fdt_gpio_state *gpio) 499 { 500 int err; 501 502 debug("%s: %s\n", __func__, prop_name); 503 gpio->gpio = FDT_GPIO_NONE; 504 gpio->name = NULL; 505 err = fdtdec_decode_gpios(blob, node, prop_name, gpio, 1); 506 return err == 1 ? 0 : err; 507 } 508 509 int fdtdec_get_gpio(struct fdt_gpio_state *gpio) 510 { 511 int val; 512 513 if (!fdt_gpio_isvalid(gpio)) 514 return -1; 515 516 val = gpio_get_value(gpio->gpio); 517 return gpio->flags & FDT_GPIO_ACTIVE_LOW ? val ^ 1 : val; 518 } 519 520 int fdtdec_set_gpio(struct fdt_gpio_state *gpio, int val) 521 { 522 if (!fdt_gpio_isvalid(gpio)) 523 return -1; 524 525 val = gpio->flags & FDT_GPIO_ACTIVE_LOW ? val ^ 1 : val; 526 return gpio_set_value(gpio->gpio, val); 527 } 528 529 int fdtdec_setup_gpio(struct fdt_gpio_state *gpio) 530 { 531 /* 532 * Return success if there is no GPIO defined. This is used for 533 * optional GPIOs) 534 */ 535 if (!fdt_gpio_isvalid(gpio)) 536 return 0; 537 538 if (gpio_request(gpio->gpio, gpio->name)) 539 return -1; 540 return 0; 541 } 542 543 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name, 544 u8 *array, int count) 545 { 546 const u8 *cell; 547 int err; 548 549 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 550 if (!err) 551 memcpy(array, cell, count); 552 return err; 553 } 554 555 const u8 *fdtdec_locate_byte_array(const void *blob, int node, 556 const char *prop_name, int count) 557 { 558 const u8 *cell; 559 int err; 560 561 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 562 if (err) 563 return NULL; 564 return cell; 565 } 566 567 int fdtdec_get_config_int(const void *blob, const char *prop_name, 568 int default_val) 569 { 570 int config_node; 571 572 debug("%s: %s\n", __func__, prop_name); 573 config_node = fdt_path_offset(blob, "/config"); 574 if (config_node < 0) 575 return default_val; 576 return fdtdec_get_int(blob, config_node, prop_name, default_val); 577 } 578 579 int fdtdec_get_config_bool(const void *blob, const char *prop_name) 580 { 581 int config_node; 582 const void *prop; 583 584 debug("%s: %s\n", __func__, prop_name); 585 config_node = fdt_path_offset(blob, "/config"); 586 if (config_node < 0) 587 return 0; 588 prop = fdt_get_property(blob, config_node, prop_name, NULL); 589 590 return prop != NULL; 591 } 592 593 char *fdtdec_get_config_string(const void *blob, const char *prop_name) 594 { 595 const char *nodep; 596 int nodeoffset; 597 int len; 598 599 debug("%s: %s\n", __func__, prop_name); 600 nodeoffset = fdt_path_offset(blob, "/config"); 601 if (nodeoffset < 0) 602 return NULL; 603 604 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len); 605 if (!nodep) 606 return NULL; 607 608 return (char *)nodep; 609 } 610 611 int fdtdec_decode_region(const void *blob, int node, 612 const char *prop_name, void **ptrp, size_t *size) 613 { 614 const fdt_addr_t *cell; 615 int len; 616 617 debug("%s: %s\n", __func__, prop_name); 618 cell = fdt_getprop(blob, node, prop_name, &len); 619 if (!cell || (len != sizeof(fdt_addr_t) * 2)) 620 return -1; 621 622 *ptrp = map_sysmem(fdt_addr_to_cpu(*cell), *size); 623 *size = fdt_size_to_cpu(cell[1]); 624 debug("%s: size=%zx\n", __func__, *size); 625 return 0; 626 } 627 628 /** 629 * Read a flash entry from the fdt 630 * 631 * @param blob FDT blob 632 * @param node Offset of node to read 633 * @param name Name of node being read 634 * @param entry Place to put offset and size of this node 635 * @return 0 if ok, -ve on error 636 */ 637 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name, 638 struct fmap_entry *entry) 639 { 640 u32 reg[2]; 641 642 if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) { 643 debug("Node '%s' has bad/missing 'reg' property\n", name); 644 return -FDT_ERR_NOTFOUND; 645 } 646 entry->offset = reg[0]; 647 entry->length = reg[1]; 648 649 return 0; 650 } 651 #else 652 #include "libfdt.h" 653 #include "fdt_support.h" 654 655 int fdtdec_get_int(const void *blob, int node, const char *prop_name, 656 int default_val) 657 { 658 const int *cell; 659 int len; 660 661 cell = fdt_getprop_w((void *)blob, node, prop_name, &len); 662 if (cell && len >= sizeof(int)) { 663 int val = fdt32_to_cpu(cell[0]); 664 665 return val; 666 } 667 return default_val; 668 } 669 #endif 670