1 /* 2 * Device manager 3 * 4 * Copyright (c) 2013 Google, Inc 5 * 6 * (C) Copyright 2012 7 * Pavel Herrmann <morpheus.ibis@gmail.com> 8 * 9 * SPDX-License-Identifier: GPL-2.0+ 10 */ 11 12 #include <common.h> 13 #include <asm/io.h> 14 #include <clk.h> 15 #include <fdtdec.h> 16 #include <fdt_support.h> 17 #include <malloc.h> 18 #include <dm/device.h> 19 #include <dm/device-internal.h> 20 #include <dm/lists.h> 21 #include <dm/of_access.h> 22 #include <dm/pinctrl.h> 23 #include <dm/platdata.h> 24 #include <dm/read.h> 25 #include <dm/uclass.h> 26 #include <dm/uclass-internal.h> 27 #include <dm/util.h> 28 #include <linux/err.h> 29 #include <linux/list.h> 30 31 DECLARE_GLOBAL_DATA_PTR; 32 33 static int device_bind_common(struct udevice *parent, const struct driver *drv, 34 const char *name, void *platdata, 35 ulong driver_data, ofnode node, 36 uint of_platdata_size, struct udevice **devp) 37 { 38 struct udevice *dev; 39 struct uclass *uc; 40 bool after_u_boot_dev = true; 41 int size, ret = 0; 42 43 if (devp) 44 *devp = NULL; 45 if (!name) 46 return -EINVAL; 47 48 ret = uclass_get(drv->id, &uc); 49 if (ret) { 50 debug("Missing uclass for driver %s\n", drv->name); 51 return ret; 52 } 53 54 #if defined(CONFIG_USING_KERNEL_DTB) && !defined(CONFIG_USING_KERNEL_DTB_V2) 55 if (gd->flags & GD_FLG_RELOC) { 56 /* For mmc/nand/spiflash, just update from kernel dtb instead bind again*/ 57 if (drv->id == UCLASS_MMC || drv->id == UCLASS_RKNAND || 58 drv->id == UCLASS_SPI_FLASH || drv->id == UCLASS_MTD || 59 drv->id == UCLASS_PCI || drv->id == UCLASS_AHCI) { 60 /* 61 * Reject all mmc device from kernel. 62 * 63 * - we always follow the rule: use mmc device from U-Boot 64 * - avoid alias id on defferent device between U-Boot and kernel 65 */ 66 if ((gd->flags & GD_FLG_KDTB_READY) && 67 (drv->id == UCLASS_MMC)) 68 return 0; 69 70 list_for_each_entry(dev, &uc->dev_head, uclass_node) { 71 if (!strcmp(name, dev->name)) { 72 debug("%s do not bind dev already in list %s\n", 73 __func__, dev->name); 74 /* 75 * There is no clearly reason for this 76 * legacy code, but remain it here since 77 * everything seems fine with or without 78 * this. Maybe removed in the future. 79 */ 80 dev->node = node; 81 return 0; 82 } 83 } 84 } 85 86 /* Use other nodes from kernel dtb */ 87 struct udevice *n; 88 89 list_for_each_entry_safe(dev, n, &uc->dev_head, uclass_node) { 90 if (!strcmp(name, dev->name) && 91 (dev_read_bool(dev, "u-boot,dm-pre-reloc") || 92 dev_read_bool(dev, "u-boot,dm-spl"))) { 93 94 /* Always use these node from U-Boot dtb */ 95 if (drv->id == UCLASS_CRYPTO || 96 drv->id == UCLASS_WDT) { 97 debug("%s do not delete uboot dev: %s\n", 98 __func__, dev->name); 99 return 0; 100 } else { 101 list_del_init(&dev->uclass_node); 102 } 103 } 104 } 105 } 106 #endif 107 dev = calloc(1, sizeof(struct udevice)); 108 if (!dev) 109 return -ENOMEM; 110 111 INIT_LIST_HEAD(&dev->sibling_node); 112 INIT_LIST_HEAD(&dev->child_head); 113 INIT_LIST_HEAD(&dev->uclass_node); 114 #ifdef CONFIG_DEVRES 115 INIT_LIST_HEAD(&dev->devres_head); 116 #endif 117 dev->platdata = platdata; 118 dev->driver_data = driver_data; 119 dev->name = name; 120 dev->node = node; 121 dev->parent = parent; 122 dev->driver = drv; 123 dev->uclass = uc; 124 125 dev->seq = -1; 126 dev->req_seq = -1; 127 if (CONFIG_IS_ENABLED(OF_CONTROL) && CONFIG_IS_ENABLED(DM_SEQ_ALIAS)) { 128 /* 129 * Some devices, such as a SPI bus, I2C bus and serial ports 130 * are numbered using aliases. 131 * 132 * This is just a 'requested' sequence, and will be 133 * resolved (and ->seq updated) when the device is probed. 134 */ 135 if (uc->uc_drv->flags & DM_UC_FLAG_SEQ_ALIAS) { 136 if (uc->uc_drv->name && ofnode_valid(node)) { 137 dev_read_alias_seq(dev, &dev->req_seq); 138 } 139 } 140 } 141 142 if (drv->platdata_auto_alloc_size) { 143 bool alloc = !platdata; 144 145 if (CONFIG_IS_ENABLED(OF_PLATDATA)) { 146 if (of_platdata_size) { 147 dev->flags |= DM_FLAG_OF_PLATDATA; 148 if (of_platdata_size < 149 drv->platdata_auto_alloc_size) 150 alloc = true; 151 } 152 } 153 if (alloc) { 154 dev->flags |= DM_FLAG_ALLOC_PDATA; 155 dev->platdata = calloc(1, 156 drv->platdata_auto_alloc_size); 157 if (!dev->platdata) { 158 ret = -ENOMEM; 159 goto fail_alloc1; 160 } 161 if (CONFIG_IS_ENABLED(OF_PLATDATA) && platdata) { 162 memcpy(dev->platdata, platdata, 163 of_platdata_size); 164 } 165 } 166 } 167 168 size = uc->uc_drv->per_device_platdata_auto_alloc_size; 169 if (size) { 170 dev->flags |= DM_FLAG_ALLOC_UCLASS_PDATA; 171 dev->uclass_platdata = calloc(1, size); 172 if (!dev->uclass_platdata) { 173 ret = -ENOMEM; 174 goto fail_alloc2; 175 } 176 } 177 178 if (parent) { 179 size = parent->driver->per_child_platdata_auto_alloc_size; 180 if (!size) { 181 size = parent->uclass->uc_drv-> 182 per_child_platdata_auto_alloc_size; 183 } 184 if (size) { 185 dev->flags |= DM_FLAG_ALLOC_PARENT_PDATA; 186 dev->parent_platdata = calloc(1, size); 187 if (!dev->parent_platdata) { 188 ret = -ENOMEM; 189 goto fail_alloc3; 190 } 191 } 192 } 193 194 /* put dev into parent's successor list */ 195 if (parent) 196 list_add_tail(&dev->sibling_node, &parent->child_head); 197 198 #ifdef CONFIG_USING_KERNEL_DTB 199 #ifdef CONFIG_USING_KERNEL_DTB_V2 200 /* 201 * Put these U-Boot devices in the head of uclass device list for 202 * the primary get by uclass_get_device_xxx(). 203 * 204 * device-list: U0, U1, U2, ... K0, K1, K2, ... (prior u-boot dev) 205 * device-list: K0, K1, K2, ... U0, U1, U2, ... (normal) 206 * 207 * U: u-boot dev 208 * K: kernel dev 209 */ 210 u32 i, prior_u_boot_uclass_id[] = { 211 UCLASS_AHCI, /* boot device */ 212 UCLASS_BLK, 213 UCLASS_MMC, 214 UCLASS_MTD, 215 UCLASS_PCI, 216 UCLASS_RKNAND, 217 UCLASS_SPI_FLASH, 218 219 UCLASS_CRYPTO, /* RSA security */ 220 UCLASS_FIRMWARE, /* psci sysreset */ 221 UCLASS_RNG, /* ramdom number */ 222 UCLASS_SYSCON, /* grf, pmugrf */ 223 UCLASS_SYSRESET, /* psci sysreset */ 224 UCLASS_WDT, /* reliable sysreset */ 225 }; 226 227 if (gd->flags & GD_FLG_KDTB_READY) { 228 after_u_boot_dev = false; 229 dev->flags |= DM_FLAG_KNRL_DTB; 230 231 for (i = 0; i < ARRAY_SIZE(prior_u_boot_uclass_id); i++) { 232 if (drv->id == prior_u_boot_uclass_id[i]) { 233 after_u_boot_dev = true; 234 break; 235 } 236 } 237 238 /* no u-boot dev ? */ 239 if (!dev->uclass->u_boot_dev_head) 240 dev->uclass->u_boot_dev_head = &uc->dev_head; 241 } else { 242 if (!dev->uclass->u_boot_dev_head) 243 dev->uclass->u_boot_dev_head = &dev->uclass_node; 244 } 245 #else 246 if (gd->flags & GD_FLG_KDTB_READY) 247 dev->flags |= DM_FLAG_KNRL_DTB; 248 #endif 249 #endif 250 ret = uclass_bind_device(dev, after_u_boot_dev); 251 if (ret) 252 goto fail_uclass_bind; 253 254 /* if we fail to bind we remove device from successors and free it */ 255 if (drv->bind) { 256 ret = drv->bind(dev); 257 if (ret) 258 goto fail_bind; 259 } 260 if (parent && parent->driver->child_post_bind) { 261 ret = parent->driver->child_post_bind(dev); 262 if (ret) 263 goto fail_child_post_bind; 264 } 265 if (uc->uc_drv->post_bind) { 266 ret = uc->uc_drv->post_bind(dev); 267 if (ret) 268 goto fail_uclass_post_bind; 269 } 270 271 if (parent) 272 pr_debug("Bound device %s to %s\n", dev->name, parent->name); 273 if (devp) 274 *devp = dev; 275 276 dev->flags |= DM_FLAG_BOUND; 277 278 return 0; 279 280 fail_uclass_post_bind: 281 /* There is no child unbind() method, so no clean-up required */ 282 fail_child_post_bind: 283 if (CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)) { 284 if (drv->unbind && drv->unbind(dev)) { 285 dm_warn("unbind() method failed on dev '%s' on error path\n", 286 dev->name); 287 } 288 } 289 290 fail_bind: 291 if (CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)) { 292 if (uclass_unbind_device(dev)) { 293 dm_warn("Failed to unbind dev '%s' on error path\n", 294 dev->name); 295 } 296 } 297 fail_uclass_bind: 298 if (CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)) { 299 list_del(&dev->sibling_node); 300 if (dev->flags & DM_FLAG_ALLOC_PARENT_PDATA) { 301 free(dev->parent_platdata); 302 dev->parent_platdata = NULL; 303 } 304 } 305 fail_alloc3: 306 if (dev->flags & DM_FLAG_ALLOC_UCLASS_PDATA) { 307 free(dev->uclass_platdata); 308 dev->uclass_platdata = NULL; 309 } 310 fail_alloc2: 311 if (dev->flags & DM_FLAG_ALLOC_PDATA) { 312 free(dev->platdata); 313 dev->platdata = NULL; 314 } 315 fail_alloc1: 316 devres_release_all(dev); 317 318 free(dev); 319 320 return ret; 321 } 322 323 int device_bind_with_driver_data(struct udevice *parent, 324 const struct driver *drv, const char *name, 325 ulong driver_data, ofnode node, 326 struct udevice **devp) 327 { 328 return device_bind_common(parent, drv, name, NULL, driver_data, node, 329 0, devp); 330 } 331 332 int device_bind(struct udevice *parent, const struct driver *drv, 333 const char *name, void *platdata, int of_offset, 334 struct udevice **devp) 335 { 336 return device_bind_common(parent, drv, name, platdata, 0, 337 offset_to_ofnode(of_offset), 0, devp); 338 } 339 340 int device_bind_by_name(struct udevice *parent, bool pre_reloc_only, 341 const struct driver_info *info, struct udevice **devp) 342 { 343 struct driver *drv; 344 uint platdata_size = 0; 345 346 drv = lists_driver_lookup_name(info->name); 347 if (!drv) 348 return -ENOENT; 349 if (pre_reloc_only && !(drv->flags & DM_FLAG_PRE_RELOC)) 350 return -EPERM; 351 352 #if CONFIG_IS_ENABLED(OF_PLATDATA) 353 platdata_size = info->platdata_size; 354 #endif 355 return device_bind_common(parent, drv, info->name, 356 (void *)info->platdata, 0, ofnode_null(), platdata_size, 357 devp); 358 } 359 360 static void *alloc_priv(int size, uint flags) 361 { 362 void *priv; 363 364 if (flags & DM_FLAG_ALLOC_PRIV_DMA) { 365 size = ROUND(size, ARCH_DMA_MINALIGN); 366 priv = memalign(ARCH_DMA_MINALIGN, size); 367 if (priv) { 368 memset(priv, '\0', size); 369 370 /* 371 * Ensure that the zero bytes are flushed to memory. 372 * This prevents problems if the driver uses this as 373 * both an input and an output buffer: 374 * 375 * 1. Zeroes written to buffer (here) and sit in the 376 * cache 377 * 2. Driver issues a read command to DMA 378 * 3. CPU runs out of cache space and evicts some cache 379 * data in the buffer, writing zeroes to RAM from 380 * the memset() above 381 * 4. DMA completes 382 * 5. Buffer now has some DMA data and some zeroes 383 * 6. Data being read is now incorrect 384 * 385 * To prevent this, ensure that the cache is clean 386 * within this range at the start. The driver can then 387 * use normal flush-after-write, invalidate-before-read 388 * procedures. 389 * 390 * TODO(sjg@chromium.org): Drop this microblaze 391 * exception. 392 */ 393 #ifndef CONFIG_MICROBLAZE 394 flush_dcache_range((ulong)priv, (ulong)priv + size); 395 #endif 396 } 397 } else { 398 priv = calloc(1, size); 399 } 400 401 return priv; 402 } 403 404 int device_probe(struct udevice *dev) 405 { 406 const struct driver *drv; 407 int size = 0; 408 int ret; 409 int seq; 410 411 if (!dev) 412 return -EINVAL; 413 414 if (dev->flags & DM_FLAG_ACTIVATED) 415 return 0; 416 417 drv = dev->driver; 418 assert(drv); 419 420 /* Allocate private data if requested and not reentered */ 421 if (drv->priv_auto_alloc_size && !dev->priv) { 422 dev->priv = alloc_priv(drv->priv_auto_alloc_size, drv->flags); 423 if (!dev->priv) { 424 ret = -ENOMEM; 425 goto fail; 426 } 427 } 428 /* Allocate private data if requested and not reentered */ 429 size = dev->uclass->uc_drv->per_device_auto_alloc_size; 430 if (size && !dev->uclass_priv) { 431 dev->uclass_priv = calloc(1, size); 432 if (!dev->uclass_priv) { 433 ret = -ENOMEM; 434 goto fail; 435 } 436 } 437 438 /* Ensure all parents are probed */ 439 if (dev->parent) { 440 size = dev->parent->driver->per_child_auto_alloc_size; 441 if (!size) { 442 size = dev->parent->uclass->uc_drv-> 443 per_child_auto_alloc_size; 444 } 445 if (size && !dev->parent_priv) { 446 dev->parent_priv = alloc_priv(size, drv->flags); 447 if (!dev->parent_priv) { 448 ret = -ENOMEM; 449 goto fail; 450 } 451 } 452 453 ret = device_probe(dev->parent); 454 if (ret) 455 goto fail; 456 457 /* 458 * The device might have already been probed during 459 * the call to device_probe() on its parent device 460 * (e.g. PCI bridge devices). Test the flags again 461 * so that we don't mess up the device. 462 */ 463 if (dev->flags & DM_FLAG_ACTIVATED) 464 return 0; 465 } 466 467 seq = uclass_resolve_seq(dev); 468 if (seq < 0) { 469 ret = seq; 470 goto fail; 471 } 472 dev->seq = seq; 473 474 dev->flags |= DM_FLAG_ACTIVATED; 475 476 /* 477 * Process pinctrl for everything except the root device, and 478 * continue regardless of the result of pinctrl. Don't process pinctrl 479 * settings for pinctrl devices since the device may not yet be 480 * probed. 481 */ 482 if (dev->parent && device_get_uclass_id(dev) != UCLASS_PINCTRL) 483 pinctrl_select_state(dev, "default"); 484 485 ret = uclass_pre_probe_device(dev); 486 if (ret) 487 goto fail; 488 489 if (dev->parent && dev->parent->driver->child_pre_probe) { 490 ret = dev->parent->driver->child_pre_probe(dev); 491 if (ret) 492 goto fail; 493 } 494 495 if (drv->ofdata_to_platdata && dev_has_of_node(dev)) { 496 ret = drv->ofdata_to_platdata(dev); 497 if (ret) 498 goto fail; 499 } 500 501 if (drv->probe) { 502 ret = drv->probe(dev); 503 if (ret) { 504 dev->flags &= ~DM_FLAG_ACTIVATED; 505 goto fail; 506 } 507 } 508 509 ret = uclass_post_probe_device(dev); 510 if (ret) 511 goto fail_uclass; 512 513 if (dev->parent && device_get_uclass_id(dev) == UCLASS_PINCTRL) 514 pinctrl_select_state(dev, "default"); 515 516 return 0; 517 fail_uclass: 518 if (device_remove(dev, DM_REMOVE_NORMAL)) { 519 dm_warn("%s: Device '%s' failed to remove on error path\n", 520 __func__, dev->name); 521 } 522 fail: 523 dev->flags &= ~DM_FLAG_ACTIVATED; 524 525 dev->seq = -1; 526 device_free(dev); 527 528 return ret; 529 } 530 531 void *dev_get_platdata(struct udevice *dev) 532 { 533 if (!dev) { 534 dm_warn("%s: null device\n", __func__); 535 return NULL; 536 } 537 538 return dev->platdata; 539 } 540 541 void *dev_get_parent_platdata(struct udevice *dev) 542 { 543 if (!dev) { 544 dm_warn("%s: null device\n", __func__); 545 return NULL; 546 } 547 548 return dev->parent_platdata; 549 } 550 551 void *dev_get_uclass_platdata(struct udevice *dev) 552 { 553 if (!dev) { 554 dm_warn("%s: null device\n", __func__); 555 return NULL; 556 } 557 558 return dev->uclass_platdata; 559 } 560 561 void *dev_get_priv(struct udevice *dev) 562 { 563 if (!dev) { 564 dm_warn("%s: null device\n", __func__); 565 return NULL; 566 } 567 568 return dev->priv; 569 } 570 571 void *dev_get_uclass_priv(struct udevice *dev) 572 { 573 if (!dev) { 574 dm_warn("%s: null device\n", __func__); 575 return NULL; 576 } 577 578 return dev->uclass_priv; 579 } 580 581 void *dev_get_parent_priv(struct udevice *dev) 582 { 583 if (!dev) { 584 dm_warn("%s: null device\n", __func__); 585 return NULL; 586 } 587 588 return dev->parent_priv; 589 } 590 591 static int device_get_device_tail(struct udevice *dev, int ret, 592 struct udevice **devp) 593 { 594 if (ret) 595 return ret; 596 597 ret = device_probe(dev); 598 if (ret) 599 return ret; 600 601 *devp = dev; 602 603 return 0; 604 } 605 606 int device_get_child(struct udevice *parent, int index, struct udevice **devp) 607 { 608 struct udevice *dev; 609 610 list_for_each_entry(dev, &parent->child_head, sibling_node) { 611 if (!index--) 612 return device_get_device_tail(dev, 0, devp); 613 } 614 615 return -ENODEV; 616 } 617 618 int device_find_child_by_seq(struct udevice *parent, int seq_or_req_seq, 619 bool find_req_seq, struct udevice **devp) 620 { 621 struct udevice *dev; 622 623 *devp = NULL; 624 if (seq_or_req_seq == -1) 625 return -ENODEV; 626 627 list_for_each_entry(dev, &parent->child_head, sibling_node) { 628 if ((find_req_seq ? dev->req_seq : dev->seq) == 629 seq_or_req_seq) { 630 *devp = dev; 631 return 0; 632 } 633 } 634 635 return -ENODEV; 636 } 637 638 int device_get_child_by_seq(struct udevice *parent, int seq, 639 struct udevice **devp) 640 { 641 struct udevice *dev; 642 int ret; 643 644 *devp = NULL; 645 ret = device_find_child_by_seq(parent, seq, false, &dev); 646 if (ret == -ENODEV) { 647 /* 648 * We didn't find it in probed devices. See if there is one 649 * that will request this seq if probed. 650 */ 651 ret = device_find_child_by_seq(parent, seq, true, &dev); 652 } 653 return device_get_device_tail(dev, ret, devp); 654 } 655 656 int device_find_child_by_of_offset(struct udevice *parent, int of_offset, 657 struct udevice **devp) 658 { 659 struct udevice *dev; 660 661 *devp = NULL; 662 663 list_for_each_entry(dev, &parent->child_head, sibling_node) { 664 if (dev_of_offset(dev) == of_offset) { 665 *devp = dev; 666 return 0; 667 } 668 } 669 670 return -ENODEV; 671 } 672 673 int device_get_child_by_of_offset(struct udevice *parent, int node, 674 struct udevice **devp) 675 { 676 struct udevice *dev; 677 int ret; 678 679 *devp = NULL; 680 ret = device_find_child_by_of_offset(parent, node, &dev); 681 return device_get_device_tail(dev, ret, devp); 682 } 683 684 static struct udevice *_device_find_global_by_of_offset(struct udevice *parent, 685 int of_offset) 686 { 687 struct udevice *dev, *found; 688 689 if (dev_of_offset(parent) == of_offset) 690 return parent; 691 692 list_for_each_entry(dev, &parent->child_head, sibling_node) { 693 found = _device_find_global_by_of_offset(dev, of_offset); 694 if (found) 695 return found; 696 } 697 698 return NULL; 699 } 700 701 int device_get_global_by_of_offset(int of_offset, struct udevice **devp) 702 { 703 struct udevice *dev; 704 705 dev = _device_find_global_by_of_offset(gd->dm_root, of_offset); 706 return device_get_device_tail(dev, dev ? 0 : -ENOENT, devp); 707 } 708 709 int device_find_first_child(struct udevice *parent, struct udevice **devp) 710 { 711 if (list_empty(&parent->child_head)) { 712 *devp = NULL; 713 } else { 714 *devp = list_first_entry(&parent->child_head, struct udevice, 715 sibling_node); 716 } 717 718 return 0; 719 } 720 721 int device_find_next_child(struct udevice **devp) 722 { 723 struct udevice *dev = *devp; 724 struct udevice *parent = dev->parent; 725 726 if (list_is_last(&dev->sibling_node, &parent->child_head)) { 727 *devp = NULL; 728 } else { 729 *devp = list_entry(dev->sibling_node.next, struct udevice, 730 sibling_node); 731 } 732 733 return 0; 734 } 735 736 struct udevice *dev_get_parent(struct udevice *child) 737 { 738 return child->parent; 739 } 740 741 ulong dev_get_driver_data(struct udevice *dev) 742 { 743 return dev->driver_data; 744 } 745 746 const void *dev_get_driver_ops(struct udevice *dev) 747 { 748 if (!dev || !dev->driver->ops) 749 return NULL; 750 751 return dev->driver->ops; 752 } 753 754 enum uclass_id device_get_uclass_id(struct udevice *dev) 755 { 756 return dev->uclass->uc_drv->id; 757 } 758 759 const char *dev_get_uclass_name(struct udevice *dev) 760 { 761 if (!dev) 762 return NULL; 763 764 return dev->uclass->uc_drv->name; 765 } 766 767 bool device_has_children(struct udevice *dev) 768 { 769 return !list_empty(&dev->child_head); 770 } 771 772 bool device_has_active_children(struct udevice *dev) 773 { 774 struct udevice *child; 775 776 for (device_find_first_child(dev, &child); 777 child; 778 device_find_next_child(&child)) { 779 if (device_active(child)) 780 return true; 781 } 782 783 return false; 784 } 785 786 bool device_is_last_sibling(struct udevice *dev) 787 { 788 struct udevice *parent = dev->parent; 789 790 if (!parent) 791 return false; 792 return list_is_last(&dev->sibling_node, &parent->child_head); 793 } 794 795 void device_set_name_alloced(struct udevice *dev) 796 { 797 dev->flags |= DM_FLAG_NAME_ALLOCED; 798 } 799 800 int device_set_name(struct udevice *dev, const char *name) 801 { 802 name = strdup(name); 803 if (!name) 804 return -ENOMEM; 805 dev->name = name; 806 device_set_name_alloced(dev); 807 808 return 0; 809 } 810 811 bool device_is_compatible(struct udevice *dev, const char *compat) 812 { 813 const void *fdt = gd->fdt_blob; 814 ofnode node = dev_ofnode(dev); 815 816 if (ofnode_is_np(node)) 817 return of_device_is_compatible(ofnode_to_np(node), compat, NULL, NULL); 818 else 819 return !fdt_node_check_compatible(fdt, ofnode_to_offset(node), compat); 820 } 821 822 bool of_machine_is_compatible(const char *compat) 823 { 824 const void *fdt = gd->fdt_blob; 825 826 return !fdt_node_check_compatible(fdt, 0, compat); 827 } 828