1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Self tests for device tree subsystem 4 */ 5 6 #define pr_fmt(fmt) "### dt-test ### " fmt 7 8 #include <linux/memblock.h> 9 #include <linux/clk.h> 10 #include <linux/err.h> 11 #include <linux/errno.h> 12 #include <linux/hashtable.h> 13 #include <linux/libfdt.h> 14 #include <linux/of.h> 15 #include <linux/of_address.h> 16 #include <linux/of_fdt.h> 17 #include <linux/of_irq.h> 18 #include <linux/of_platform.h> 19 #include <linux/list.h> 20 #include <linux/mutex.h> 21 #include <linux/slab.h> 22 #include <linux/device.h> 23 #include <linux/platform_device.h> 24 25 #include <linux/i2c.h> 26 #include <linux/i2c-mux.h> 27 28 #include <linux/bitops.h> 29 30 #include "of_private.h" 31 32 static struct unittest_results { 33 int passed; 34 int failed; 35 } unittest_results; 36 37 #define unittest(result, fmt, ...) ({ \ 38 bool failed = !(result); \ 39 if (failed) { \ 40 unittest_results.failed++; \ 41 pr_err("FAIL %s():%i " fmt, __func__, __LINE__, ##__VA_ARGS__); \ 42 } else { \ 43 unittest_results.passed++; \ 44 pr_debug("pass %s():%i\n", __func__, __LINE__); \ 45 } \ 46 failed; \ 47 }) 48 49 static void __init of_unittest_find_node_by_name(void) 50 { 51 struct device_node *np; 52 const char *options, *name; 53 54 np = of_find_node_by_path("/testcase-data"); 55 name = kasprintf(GFP_KERNEL, "%pOF", np); 56 unittest(np && !strcmp("/testcase-data", name), 57 "find /testcase-data failed\n"); 58 of_node_put(np); 59 kfree(name); 60 61 /* Test if trailing '/' works */ 62 np = of_find_node_by_path("/testcase-data/"); 63 unittest(!np, "trailing '/' on /testcase-data/ should fail\n"); 64 65 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); 66 name = kasprintf(GFP_KERNEL, "%pOF", np); 67 unittest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", name), 68 "find /testcase-data/phandle-tests/consumer-a failed\n"); 69 of_node_put(np); 70 kfree(name); 71 72 np = of_find_node_by_path("testcase-alias"); 73 name = kasprintf(GFP_KERNEL, "%pOF", np); 74 unittest(np && !strcmp("/testcase-data", name), 75 "find testcase-alias failed\n"); 76 of_node_put(np); 77 kfree(name); 78 79 /* Test if trailing '/' works on aliases */ 80 np = of_find_node_by_path("testcase-alias/"); 81 unittest(!np, "trailing '/' on testcase-alias/ should fail\n"); 82 83 np = of_find_node_by_path("testcase-alias/phandle-tests/consumer-a"); 84 name = kasprintf(GFP_KERNEL, "%pOF", np); 85 unittest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", name), 86 "find testcase-alias/phandle-tests/consumer-a failed\n"); 87 of_node_put(np); 88 kfree(name); 89 90 np = of_find_node_by_path("/testcase-data/missing-path"); 91 unittest(!np, "non-existent path returned node %pOF\n", np); 92 of_node_put(np); 93 94 np = of_find_node_by_path("missing-alias"); 95 unittest(!np, "non-existent alias returned node %pOF\n", np); 96 of_node_put(np); 97 98 np = of_find_node_by_path("testcase-alias/missing-path"); 99 unittest(!np, "non-existent alias with relative path returned node %pOF\n", np); 100 of_node_put(np); 101 102 np = of_find_node_opts_by_path("/testcase-data:testoption", &options); 103 unittest(np && !strcmp("testoption", options), 104 "option path test failed\n"); 105 of_node_put(np); 106 107 np = of_find_node_opts_by_path("/testcase-data:test/option", &options); 108 unittest(np && !strcmp("test/option", options), 109 "option path test, subcase #1 failed\n"); 110 of_node_put(np); 111 112 np = of_find_node_opts_by_path("/testcase-data/testcase-device1:test/option", &options); 113 unittest(np && !strcmp("test/option", options), 114 "option path test, subcase #2 failed\n"); 115 of_node_put(np); 116 117 np = of_find_node_opts_by_path("/testcase-data:testoption", NULL); 118 unittest(np, "NULL option path test failed\n"); 119 of_node_put(np); 120 121 np = of_find_node_opts_by_path("testcase-alias:testaliasoption", 122 &options); 123 unittest(np && !strcmp("testaliasoption", options), 124 "option alias path test failed\n"); 125 of_node_put(np); 126 127 np = of_find_node_opts_by_path("testcase-alias:test/alias/option", 128 &options); 129 unittest(np && !strcmp("test/alias/option", options), 130 "option alias path test, subcase #1 failed\n"); 131 of_node_put(np); 132 133 np = of_find_node_opts_by_path("testcase-alias:testaliasoption", NULL); 134 unittest(np, "NULL option alias path test failed\n"); 135 of_node_put(np); 136 137 options = "testoption"; 138 np = of_find_node_opts_by_path("testcase-alias", &options); 139 unittest(np && !options, "option clearing test failed\n"); 140 of_node_put(np); 141 142 options = "testoption"; 143 np = of_find_node_opts_by_path("/", &options); 144 unittest(np && !options, "option clearing root node test failed\n"); 145 of_node_put(np); 146 } 147 148 static void __init of_unittest_dynamic(void) 149 { 150 struct device_node *np; 151 struct property *prop; 152 153 np = of_find_node_by_path("/testcase-data"); 154 if (!np) { 155 pr_err("missing testcase data\n"); 156 return; 157 } 158 159 /* Array of 4 properties for the purpose of testing */ 160 prop = kcalloc(4, sizeof(*prop), GFP_KERNEL); 161 if (!prop) { 162 unittest(0, "kzalloc() failed\n"); 163 return; 164 } 165 166 /* Add a new property - should pass*/ 167 prop->name = "new-property"; 168 prop->value = "new-property-data"; 169 prop->length = strlen(prop->value) + 1; 170 unittest(of_add_property(np, prop) == 0, "Adding a new property failed\n"); 171 172 /* Try to add an existing property - should fail */ 173 prop++; 174 prop->name = "new-property"; 175 prop->value = "new-property-data-should-fail"; 176 prop->length = strlen(prop->value) + 1; 177 unittest(of_add_property(np, prop) != 0, 178 "Adding an existing property should have failed\n"); 179 180 /* Try to modify an existing property - should pass */ 181 prop->value = "modify-property-data-should-pass"; 182 prop->length = strlen(prop->value) + 1; 183 unittest(of_update_property(np, prop) == 0, 184 "Updating an existing property should have passed\n"); 185 186 /* Try to modify non-existent property - should pass*/ 187 prop++; 188 prop->name = "modify-property"; 189 prop->value = "modify-missing-property-data-should-pass"; 190 prop->length = strlen(prop->value) + 1; 191 unittest(of_update_property(np, prop) == 0, 192 "Updating a missing property should have passed\n"); 193 194 /* Remove property - should pass */ 195 unittest(of_remove_property(np, prop) == 0, 196 "Removing a property should have passed\n"); 197 198 /* Adding very large property - should pass */ 199 prop++; 200 prop->name = "large-property-PAGE_SIZEx8"; 201 prop->length = PAGE_SIZE * 8; 202 prop->value = kzalloc(prop->length, GFP_KERNEL); 203 unittest(prop->value != NULL, "Unable to allocate large buffer\n"); 204 if (prop->value) 205 unittest(of_add_property(np, prop) == 0, 206 "Adding a large property should have passed\n"); 207 } 208 209 static int __init of_unittest_check_node_linkage(struct device_node *np) 210 { 211 struct device_node *child; 212 int count = 0, rc; 213 214 for_each_child_of_node(np, child) { 215 if (child->parent != np) { 216 pr_err("Child node %pOFn links to wrong parent %pOFn\n", 217 child, np); 218 rc = -EINVAL; 219 goto put_child; 220 } 221 222 rc = of_unittest_check_node_linkage(child); 223 if (rc < 0) 224 goto put_child; 225 count += rc; 226 } 227 228 return count + 1; 229 put_child: 230 of_node_put(child); 231 return rc; 232 } 233 234 static void __init of_unittest_check_tree_linkage(void) 235 { 236 struct device_node *np; 237 int allnode_count = 0, child_count; 238 239 if (!of_root) 240 return; 241 242 for_each_of_allnodes(np) 243 allnode_count++; 244 child_count = of_unittest_check_node_linkage(of_root); 245 246 unittest(child_count > 0, "Device node data structure is corrupted\n"); 247 unittest(child_count == allnode_count, 248 "allnodes list size (%i) doesn't match sibling lists size (%i)\n", 249 allnode_count, child_count); 250 pr_debug("allnodes list size (%i); sibling lists size (%i)\n", allnode_count, child_count); 251 } 252 253 static void __init of_unittest_printf_one(struct device_node *np, const char *fmt, 254 const char *expected) 255 { 256 unsigned char *buf; 257 int buf_size; 258 int size, i; 259 260 buf_size = strlen(expected) + 10; 261 buf = kmalloc(buf_size, GFP_KERNEL); 262 if (!buf) 263 return; 264 265 /* Baseline; check conversion with a large size limit */ 266 memset(buf, 0xff, buf_size); 267 size = snprintf(buf, buf_size - 2, fmt, np); 268 269 /* use strcmp() instead of strncmp() here to be absolutely sure strings match */ 270 unittest((strcmp(buf, expected) == 0) && (buf[size+1] == 0xff), 271 "sprintf failed; fmt='%s' expected='%s' rslt='%s'\n", 272 fmt, expected, buf); 273 274 /* Make sure length limits work */ 275 size++; 276 for (i = 0; i < 2; i++, size--) { 277 /* Clear the buffer, and make sure it works correctly still */ 278 memset(buf, 0xff, buf_size); 279 snprintf(buf, size+1, fmt, np); 280 unittest(strncmp(buf, expected, size) == 0 && (buf[size+1] == 0xff), 281 "snprintf failed; size=%i fmt='%s' expected='%s' rslt='%s'\n", 282 size, fmt, expected, buf); 283 } 284 kfree(buf); 285 } 286 287 static void __init of_unittest_printf(void) 288 { 289 struct device_node *np; 290 const char *full_name = "/testcase-data/platform-tests/test-device@1/dev@100"; 291 char phandle_str[16] = ""; 292 293 np = of_find_node_by_path(full_name); 294 if (!np) { 295 unittest(np, "testcase data missing\n"); 296 return; 297 } 298 299 num_to_str(phandle_str, sizeof(phandle_str), np->phandle, 0); 300 301 of_unittest_printf_one(np, "%pOF", full_name); 302 of_unittest_printf_one(np, "%pOFf", full_name); 303 of_unittest_printf_one(np, "%pOFn", "dev"); 304 of_unittest_printf_one(np, "%2pOFn", "dev"); 305 of_unittest_printf_one(np, "%5pOFn", " dev"); 306 of_unittest_printf_one(np, "%pOFnc", "dev:test-sub-device"); 307 of_unittest_printf_one(np, "%pOFp", phandle_str); 308 of_unittest_printf_one(np, "%pOFP", "dev@100"); 309 of_unittest_printf_one(np, "ABC %pOFP ABC", "ABC dev@100 ABC"); 310 of_unittest_printf_one(np, "%10pOFP", " dev@100"); 311 of_unittest_printf_one(np, "%-10pOFP", "dev@100 "); 312 of_unittest_printf_one(of_root, "%pOFP", "/"); 313 of_unittest_printf_one(np, "%pOFF", "----"); 314 of_unittest_printf_one(np, "%pOFPF", "dev@100:----"); 315 of_unittest_printf_one(np, "%pOFPFPc", "dev@100:----:dev@100:test-sub-device"); 316 of_unittest_printf_one(np, "%pOFc", "test-sub-device"); 317 of_unittest_printf_one(np, "%pOFC", 318 "\"test-sub-device\",\"test-compat2\",\"test-compat3\""); 319 } 320 321 struct node_hash { 322 struct hlist_node node; 323 struct device_node *np; 324 }; 325 326 static DEFINE_HASHTABLE(phandle_ht, 8); 327 static void __init of_unittest_check_phandles(void) 328 { 329 struct device_node *np; 330 struct node_hash *nh; 331 struct hlist_node *tmp; 332 int i, dup_count = 0, phandle_count = 0; 333 334 for_each_of_allnodes(np) { 335 if (!np->phandle) 336 continue; 337 338 hash_for_each_possible(phandle_ht, nh, node, np->phandle) { 339 if (nh->np->phandle == np->phandle) { 340 pr_info("Duplicate phandle! %i used by %pOF and %pOF\n", 341 np->phandle, nh->np, np); 342 dup_count++; 343 break; 344 } 345 } 346 347 nh = kzalloc(sizeof(*nh), GFP_KERNEL); 348 if (!nh) 349 return; 350 351 nh->np = np; 352 hash_add(phandle_ht, &nh->node, np->phandle); 353 phandle_count++; 354 } 355 unittest(dup_count == 0, "Found %i duplicates in %i phandles\n", 356 dup_count, phandle_count); 357 358 /* Clean up */ 359 hash_for_each_safe(phandle_ht, i, tmp, nh, node) { 360 hash_del(&nh->node); 361 kfree(nh); 362 } 363 } 364 365 static void __init of_unittest_parse_phandle_with_args(void) 366 { 367 struct device_node *np; 368 struct of_phandle_args args; 369 int i, rc; 370 371 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); 372 if (!np) { 373 pr_err("missing testcase data\n"); 374 return; 375 } 376 377 rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells"); 378 unittest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc); 379 380 for (i = 0; i < 8; i++) { 381 bool passed = true; 382 383 memset(&args, 0, sizeof(args)); 384 rc = of_parse_phandle_with_args(np, "phandle-list", 385 "#phandle-cells", i, &args); 386 387 /* Test the values from tests-phandle.dtsi */ 388 switch (i) { 389 case 0: 390 passed &= !rc; 391 passed &= (args.args_count == 1); 392 passed &= (args.args[0] == (i + 1)); 393 break; 394 case 1: 395 passed &= !rc; 396 passed &= (args.args_count == 2); 397 passed &= (args.args[0] == (i + 1)); 398 passed &= (args.args[1] == 0); 399 break; 400 case 2: 401 passed &= (rc == -ENOENT); 402 break; 403 case 3: 404 passed &= !rc; 405 passed &= (args.args_count == 3); 406 passed &= (args.args[0] == (i + 1)); 407 passed &= (args.args[1] == 4); 408 passed &= (args.args[2] == 3); 409 break; 410 case 4: 411 passed &= !rc; 412 passed &= (args.args_count == 2); 413 passed &= (args.args[0] == (i + 1)); 414 passed &= (args.args[1] == 100); 415 break; 416 case 5: 417 passed &= !rc; 418 passed &= (args.args_count == 0); 419 break; 420 case 6: 421 passed &= !rc; 422 passed &= (args.args_count == 1); 423 passed &= (args.args[0] == (i + 1)); 424 break; 425 case 7: 426 passed &= (rc == -ENOENT); 427 break; 428 default: 429 passed = false; 430 } 431 432 unittest(passed, "index %i - data error on node %pOF rc=%i\n", 433 i, args.np, rc); 434 } 435 436 /* Check for missing list property */ 437 memset(&args, 0, sizeof(args)); 438 rc = of_parse_phandle_with_args(np, "phandle-list-missing", 439 "#phandle-cells", 0, &args); 440 unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc); 441 rc = of_count_phandle_with_args(np, "phandle-list-missing", 442 "#phandle-cells"); 443 unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc); 444 445 /* Check for missing cells property */ 446 memset(&args, 0, sizeof(args)); 447 rc = of_parse_phandle_with_args(np, "phandle-list", 448 "#phandle-cells-missing", 0, &args); 449 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 450 rc = of_count_phandle_with_args(np, "phandle-list", 451 "#phandle-cells-missing"); 452 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 453 454 /* Check for bad phandle in list */ 455 memset(&args, 0, sizeof(args)); 456 rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle", 457 "#phandle-cells", 0, &args); 458 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 459 rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle", 460 "#phandle-cells"); 461 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 462 463 /* Check for incorrectly formed argument list */ 464 memset(&args, 0, sizeof(args)); 465 rc = of_parse_phandle_with_args(np, "phandle-list-bad-args", 466 "#phandle-cells", 1, &args); 467 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 468 rc = of_count_phandle_with_args(np, "phandle-list-bad-args", 469 "#phandle-cells"); 470 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 471 } 472 473 static void __init of_unittest_parse_phandle_with_args_map(void) 474 { 475 struct device_node *np, *p0, *p1, *p2, *p3; 476 struct of_phandle_args args; 477 int i, rc; 478 479 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-b"); 480 if (!np) { 481 pr_err("missing testcase data\n"); 482 return; 483 } 484 485 p0 = of_find_node_by_path("/testcase-data/phandle-tests/provider0"); 486 if (!p0) { 487 pr_err("missing testcase data\n"); 488 return; 489 } 490 491 p1 = of_find_node_by_path("/testcase-data/phandle-tests/provider1"); 492 if (!p1) { 493 pr_err("missing testcase data\n"); 494 return; 495 } 496 497 p2 = of_find_node_by_path("/testcase-data/phandle-tests/provider2"); 498 if (!p2) { 499 pr_err("missing testcase data\n"); 500 return; 501 } 502 503 p3 = of_find_node_by_path("/testcase-data/phandle-tests/provider3"); 504 if (!p3) { 505 pr_err("missing testcase data\n"); 506 return; 507 } 508 509 rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells"); 510 unittest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc); 511 512 for (i = 0; i < 8; i++) { 513 bool passed = true; 514 515 memset(&args, 0, sizeof(args)); 516 rc = of_parse_phandle_with_args_map(np, "phandle-list", 517 "phandle", i, &args); 518 519 /* Test the values from tests-phandle.dtsi */ 520 switch (i) { 521 case 0: 522 passed &= !rc; 523 passed &= (args.np == p1); 524 passed &= (args.args_count == 1); 525 passed &= (args.args[0] == 1); 526 break; 527 case 1: 528 passed &= !rc; 529 passed &= (args.np == p3); 530 passed &= (args.args_count == 3); 531 passed &= (args.args[0] == 2); 532 passed &= (args.args[1] == 5); 533 passed &= (args.args[2] == 3); 534 break; 535 case 2: 536 passed &= (rc == -ENOENT); 537 break; 538 case 3: 539 passed &= !rc; 540 passed &= (args.np == p0); 541 passed &= (args.args_count == 0); 542 break; 543 case 4: 544 passed &= !rc; 545 passed &= (args.np == p1); 546 passed &= (args.args_count == 1); 547 passed &= (args.args[0] == 3); 548 break; 549 case 5: 550 passed &= !rc; 551 passed &= (args.np == p0); 552 passed &= (args.args_count == 0); 553 break; 554 case 6: 555 passed &= !rc; 556 passed &= (args.np == p2); 557 passed &= (args.args_count == 2); 558 passed &= (args.args[0] == 15); 559 passed &= (args.args[1] == 0x20); 560 break; 561 case 7: 562 passed &= (rc == -ENOENT); 563 break; 564 default: 565 passed = false; 566 } 567 568 unittest(passed, "index %i - data error on node %s rc=%i\n", 569 i, args.np->full_name, rc); 570 } 571 572 /* Check for missing list property */ 573 memset(&args, 0, sizeof(args)); 574 rc = of_parse_phandle_with_args_map(np, "phandle-list-missing", 575 "phandle", 0, &args); 576 unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc); 577 578 /* Check for missing cells,map,mask property */ 579 memset(&args, 0, sizeof(args)); 580 rc = of_parse_phandle_with_args_map(np, "phandle-list", 581 "phandle-missing", 0, &args); 582 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 583 584 /* Check for bad phandle in list */ 585 memset(&args, 0, sizeof(args)); 586 rc = of_parse_phandle_with_args_map(np, "phandle-list-bad-phandle", 587 "phandle", 0, &args); 588 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 589 590 /* Check for incorrectly formed argument list */ 591 memset(&args, 0, sizeof(args)); 592 rc = of_parse_phandle_with_args_map(np, "phandle-list-bad-args", 593 "phandle", 1, &args); 594 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 595 } 596 597 static void __init of_unittest_property_string(void) 598 { 599 const char *strings[4]; 600 struct device_node *np; 601 int rc; 602 603 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); 604 if (!np) { 605 pr_err("No testcase data in device tree\n"); 606 return; 607 } 608 609 rc = of_property_match_string(np, "phandle-list-names", "first"); 610 unittest(rc == 0, "first expected:0 got:%i\n", rc); 611 rc = of_property_match_string(np, "phandle-list-names", "second"); 612 unittest(rc == 1, "second expected:1 got:%i\n", rc); 613 rc = of_property_match_string(np, "phandle-list-names", "third"); 614 unittest(rc == 2, "third expected:2 got:%i\n", rc); 615 rc = of_property_match_string(np, "phandle-list-names", "fourth"); 616 unittest(rc == -ENODATA, "unmatched string; rc=%i\n", rc); 617 rc = of_property_match_string(np, "missing-property", "blah"); 618 unittest(rc == -EINVAL, "missing property; rc=%i\n", rc); 619 rc = of_property_match_string(np, "empty-property", "blah"); 620 unittest(rc == -ENODATA, "empty property; rc=%i\n", rc); 621 rc = of_property_match_string(np, "unterminated-string", "blah"); 622 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc); 623 624 /* of_property_count_strings() tests */ 625 rc = of_property_count_strings(np, "string-property"); 626 unittest(rc == 1, "Incorrect string count; rc=%i\n", rc); 627 rc = of_property_count_strings(np, "phandle-list-names"); 628 unittest(rc == 3, "Incorrect string count; rc=%i\n", rc); 629 rc = of_property_count_strings(np, "unterminated-string"); 630 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc); 631 rc = of_property_count_strings(np, "unterminated-string-list"); 632 unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc); 633 634 /* of_property_read_string_index() tests */ 635 rc = of_property_read_string_index(np, "string-property", 0, strings); 636 unittest(rc == 0 && !strcmp(strings[0], "foobar"), "of_property_read_string_index() failure; rc=%i\n", rc); 637 strings[0] = NULL; 638 rc = of_property_read_string_index(np, "string-property", 1, strings); 639 unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc); 640 rc = of_property_read_string_index(np, "phandle-list-names", 0, strings); 641 unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc); 642 rc = of_property_read_string_index(np, "phandle-list-names", 1, strings); 643 unittest(rc == 0 && !strcmp(strings[0], "second"), "of_property_read_string_index() failure; rc=%i\n", rc); 644 rc = of_property_read_string_index(np, "phandle-list-names", 2, strings); 645 unittest(rc == 0 && !strcmp(strings[0], "third"), "of_property_read_string_index() failure; rc=%i\n", rc); 646 strings[0] = NULL; 647 rc = of_property_read_string_index(np, "phandle-list-names", 3, strings); 648 unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc); 649 strings[0] = NULL; 650 rc = of_property_read_string_index(np, "unterminated-string", 0, strings); 651 unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc); 652 rc = of_property_read_string_index(np, "unterminated-string-list", 0, strings); 653 unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc); 654 strings[0] = NULL; 655 rc = of_property_read_string_index(np, "unterminated-string-list", 2, strings); /* should fail */ 656 unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc); 657 strings[1] = NULL; 658 659 /* of_property_read_string_array() tests */ 660 rc = of_property_read_string_array(np, "string-property", strings, 4); 661 unittest(rc == 1, "Incorrect string count; rc=%i\n", rc); 662 rc = of_property_read_string_array(np, "phandle-list-names", strings, 4); 663 unittest(rc == 3, "Incorrect string count; rc=%i\n", rc); 664 rc = of_property_read_string_array(np, "unterminated-string", strings, 4); 665 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc); 666 /* -- An incorrectly formed string should cause a failure */ 667 rc = of_property_read_string_array(np, "unterminated-string-list", strings, 4); 668 unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc); 669 /* -- parsing the correctly formed strings should still work: */ 670 strings[2] = NULL; 671 rc = of_property_read_string_array(np, "unterminated-string-list", strings, 2); 672 unittest(rc == 2 && strings[2] == NULL, "of_property_read_string_array() failure; rc=%i\n", rc); 673 strings[1] = NULL; 674 rc = of_property_read_string_array(np, "phandle-list-names", strings, 1); 675 unittest(rc == 1 && strings[1] == NULL, "Overwrote end of string array; rc=%i, str='%s'\n", rc, strings[1]); 676 } 677 678 #define propcmp(p1, p2) (((p1)->length == (p2)->length) && \ 679 (p1)->value && (p2)->value && \ 680 !memcmp((p1)->value, (p2)->value, (p1)->length) && \ 681 !strcmp((p1)->name, (p2)->name)) 682 static void __init of_unittest_property_copy(void) 683 { 684 #ifdef CONFIG_OF_DYNAMIC 685 struct property p1 = { .name = "p1", .length = 0, .value = "" }; 686 struct property p2 = { .name = "p2", .length = 5, .value = "abcd" }; 687 struct property *new; 688 689 new = __of_prop_dup(&p1, GFP_KERNEL); 690 unittest(new && propcmp(&p1, new), "empty property didn't copy correctly\n"); 691 kfree(new->value); 692 kfree(new->name); 693 kfree(new); 694 695 new = __of_prop_dup(&p2, GFP_KERNEL); 696 unittest(new && propcmp(&p2, new), "non-empty property didn't copy correctly\n"); 697 kfree(new->value); 698 kfree(new->name); 699 kfree(new); 700 #endif 701 } 702 703 static void __init of_unittest_changeset(void) 704 { 705 #ifdef CONFIG_OF_DYNAMIC 706 struct property *ppadd, padd = { .name = "prop-add", .length = 1, .value = "" }; 707 struct property *ppname_n1, pname_n1 = { .name = "name", .length = 3, .value = "n1" }; 708 struct property *ppname_n2, pname_n2 = { .name = "name", .length = 3, .value = "n2" }; 709 struct property *ppname_n21, pname_n21 = { .name = "name", .length = 3, .value = "n21" }; 710 struct property *ppupdate, pupdate = { .name = "prop-update", .length = 5, .value = "abcd" }; 711 struct property *ppremove; 712 struct device_node *n1, *n2, *n21, *nchangeset, *nremove, *parent, *np; 713 struct of_changeset chgset; 714 715 n1 = __of_node_dup(NULL, "n1"); 716 unittest(n1, "testcase setup failure\n"); 717 718 n2 = __of_node_dup(NULL, "n2"); 719 unittest(n2, "testcase setup failure\n"); 720 721 n21 = __of_node_dup(NULL, "n21"); 722 unittest(n21, "testcase setup failure %p\n", n21); 723 724 nchangeset = of_find_node_by_path("/testcase-data/changeset"); 725 nremove = of_get_child_by_name(nchangeset, "node-remove"); 726 unittest(nremove, "testcase setup failure\n"); 727 728 ppadd = __of_prop_dup(&padd, GFP_KERNEL); 729 unittest(ppadd, "testcase setup failure\n"); 730 731 ppname_n1 = __of_prop_dup(&pname_n1, GFP_KERNEL); 732 unittest(ppname_n1, "testcase setup failure\n"); 733 734 ppname_n2 = __of_prop_dup(&pname_n2, GFP_KERNEL); 735 unittest(ppname_n2, "testcase setup failure\n"); 736 737 ppname_n21 = __of_prop_dup(&pname_n21, GFP_KERNEL); 738 unittest(ppname_n21, "testcase setup failure\n"); 739 740 ppupdate = __of_prop_dup(&pupdate, GFP_KERNEL); 741 unittest(ppupdate, "testcase setup failure\n"); 742 743 parent = nchangeset; 744 n1->parent = parent; 745 n2->parent = parent; 746 n21->parent = n2; 747 748 ppremove = of_find_property(parent, "prop-remove", NULL); 749 unittest(ppremove, "failed to find removal prop"); 750 751 of_changeset_init(&chgset); 752 753 unittest(!of_changeset_attach_node(&chgset, n1), "fail attach n1\n"); 754 unittest(!of_changeset_add_property(&chgset, n1, ppname_n1), "fail add prop name\n"); 755 756 unittest(!of_changeset_attach_node(&chgset, n2), "fail attach n2\n"); 757 unittest(!of_changeset_add_property(&chgset, n2, ppname_n2), "fail add prop name\n"); 758 759 unittest(!of_changeset_detach_node(&chgset, nremove), "fail remove node\n"); 760 unittest(!of_changeset_add_property(&chgset, n21, ppname_n21), "fail add prop name\n"); 761 762 unittest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n"); 763 764 unittest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop prop-add\n"); 765 unittest(!of_changeset_update_property(&chgset, parent, ppupdate), "fail update prop\n"); 766 unittest(!of_changeset_remove_property(&chgset, parent, ppremove), "fail remove prop\n"); 767 768 unittest(!of_changeset_apply(&chgset), "apply failed\n"); 769 770 of_node_put(nchangeset); 771 772 /* Make sure node names are constructed correctly */ 773 unittest((np = of_find_node_by_path("/testcase-data/changeset/n2/n21")), 774 "'%pOF' not added\n", n21); 775 of_node_put(np); 776 777 unittest(!of_changeset_revert(&chgset), "revert failed\n"); 778 779 of_changeset_destroy(&chgset); 780 #endif 781 } 782 783 static void __init of_unittest_dma_ranges_one(const char *path, 784 u64 expect_dma_addr, u64 expect_paddr, u64 expect_size) 785 { 786 struct device_node *np; 787 u64 dma_addr, paddr, size; 788 int rc; 789 790 np = of_find_node_by_path(path); 791 if (!np) { 792 pr_err("missing testcase data\n"); 793 return; 794 } 795 796 rc = of_dma_get_range(np, &dma_addr, &paddr, &size); 797 798 unittest(!rc, "of_dma_get_range failed on node %pOF rc=%i\n", np, rc); 799 if (!rc) { 800 unittest(size == expect_size, 801 "of_dma_get_range wrong size on node %pOF size=%llx\n", np, size); 802 unittest(paddr == expect_paddr, 803 "of_dma_get_range wrong phys addr (%llx) on node %pOF", paddr, np); 804 unittest(dma_addr == expect_dma_addr, 805 "of_dma_get_range wrong DMA addr (%llx) on node %pOF", dma_addr, np); 806 } 807 of_node_put(np); 808 } 809 810 static void __init of_unittest_parse_dma_ranges(void) 811 { 812 of_unittest_dma_ranges_one("/testcase-data/address-tests/device@70000000", 813 0x0, 0x20000000, 0x40000000); 814 of_unittest_dma_ranges_one("/testcase-data/address-tests/bus@80000000/device@1000", 815 0x10000000, 0x20000000, 0x40000000); 816 of_unittest_dma_ranges_one("/testcase-data/address-tests/pci@90000000", 817 0x80000000, 0x20000000, 0x10000000); 818 } 819 820 static void __init of_unittest_pci_dma_ranges(void) 821 { 822 struct device_node *np; 823 struct of_pci_range range; 824 struct of_pci_range_parser parser; 825 int i = 0; 826 827 if (!IS_ENABLED(CONFIG_PCI)) 828 return; 829 830 np = of_find_node_by_path("/testcase-data/address-tests/pci@90000000"); 831 if (!np) { 832 pr_err("missing testcase data\n"); 833 return; 834 } 835 836 if (of_pci_dma_range_parser_init(&parser, np)) { 837 pr_err("missing dma-ranges property\n"); 838 return; 839 } 840 841 /* 842 * Get the dma-ranges from the device tree 843 */ 844 for_each_of_pci_range(&parser, &range) { 845 if (!i) { 846 unittest(range.size == 0x10000000, 847 "for_each_of_pci_range wrong size on node %pOF size=%llx\n", 848 np, range.size); 849 unittest(range.cpu_addr == 0x20000000, 850 "for_each_of_pci_range wrong CPU addr (%llx) on node %pOF", 851 range.cpu_addr, np); 852 unittest(range.pci_addr == 0x80000000, 853 "for_each_of_pci_range wrong DMA addr (%llx) on node %pOF", 854 range.pci_addr, np); 855 } else { 856 unittest(range.size == 0x10000000, 857 "for_each_of_pci_range wrong size on node %pOF size=%llx\n", 858 np, range.size); 859 unittest(range.cpu_addr == 0x40000000, 860 "for_each_of_pci_range wrong CPU addr (%llx) on node %pOF", 861 range.cpu_addr, np); 862 unittest(range.pci_addr == 0xc0000000, 863 "for_each_of_pci_range wrong DMA addr (%llx) on node %pOF", 864 range.pci_addr, np); 865 } 866 i++; 867 } 868 869 of_node_put(np); 870 } 871 872 static void __init of_unittest_parse_interrupts(void) 873 { 874 struct device_node *np; 875 struct of_phandle_args args; 876 int i, rc; 877 878 if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC) 879 return; 880 881 np = of_find_node_by_path("/testcase-data/interrupts/interrupts0"); 882 if (!np) { 883 pr_err("missing testcase data\n"); 884 return; 885 } 886 887 for (i = 0; i < 4; i++) { 888 bool passed = true; 889 890 memset(&args, 0, sizeof(args)); 891 rc = of_irq_parse_one(np, i, &args); 892 893 passed &= !rc; 894 passed &= (args.args_count == 1); 895 passed &= (args.args[0] == (i + 1)); 896 897 unittest(passed, "index %i - data error on node %pOF rc=%i\n", 898 i, args.np, rc); 899 } 900 of_node_put(np); 901 902 np = of_find_node_by_path("/testcase-data/interrupts/interrupts1"); 903 if (!np) { 904 pr_err("missing testcase data\n"); 905 return; 906 } 907 908 for (i = 0; i < 4; i++) { 909 bool passed = true; 910 911 memset(&args, 0, sizeof(args)); 912 rc = of_irq_parse_one(np, i, &args); 913 914 /* Test the values from tests-phandle.dtsi */ 915 switch (i) { 916 case 0: 917 passed &= !rc; 918 passed &= (args.args_count == 1); 919 passed &= (args.args[0] == 9); 920 break; 921 case 1: 922 passed &= !rc; 923 passed &= (args.args_count == 3); 924 passed &= (args.args[0] == 10); 925 passed &= (args.args[1] == 11); 926 passed &= (args.args[2] == 12); 927 break; 928 case 2: 929 passed &= !rc; 930 passed &= (args.args_count == 2); 931 passed &= (args.args[0] == 13); 932 passed &= (args.args[1] == 14); 933 break; 934 case 3: 935 passed &= !rc; 936 passed &= (args.args_count == 2); 937 passed &= (args.args[0] == 15); 938 passed &= (args.args[1] == 16); 939 break; 940 default: 941 passed = false; 942 } 943 unittest(passed, "index %i - data error on node %pOF rc=%i\n", 944 i, args.np, rc); 945 } 946 of_node_put(np); 947 } 948 949 static void __init of_unittest_parse_interrupts_extended(void) 950 { 951 struct device_node *np; 952 struct of_phandle_args args; 953 int i, rc; 954 955 if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC) 956 return; 957 958 np = of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0"); 959 if (!np) { 960 pr_err("missing testcase data\n"); 961 return; 962 } 963 964 for (i = 0; i < 7; i++) { 965 bool passed = true; 966 967 memset(&args, 0, sizeof(args)); 968 rc = of_irq_parse_one(np, i, &args); 969 970 /* Test the values from tests-phandle.dtsi */ 971 switch (i) { 972 case 0: 973 passed &= !rc; 974 passed &= (args.args_count == 1); 975 passed &= (args.args[0] == 1); 976 break; 977 case 1: 978 passed &= !rc; 979 passed &= (args.args_count == 3); 980 passed &= (args.args[0] == 2); 981 passed &= (args.args[1] == 3); 982 passed &= (args.args[2] == 4); 983 break; 984 case 2: 985 passed &= !rc; 986 passed &= (args.args_count == 2); 987 passed &= (args.args[0] == 5); 988 passed &= (args.args[1] == 6); 989 break; 990 case 3: 991 passed &= !rc; 992 passed &= (args.args_count == 1); 993 passed &= (args.args[0] == 9); 994 break; 995 case 4: 996 passed &= !rc; 997 passed &= (args.args_count == 3); 998 passed &= (args.args[0] == 10); 999 passed &= (args.args[1] == 11); 1000 passed &= (args.args[2] == 12); 1001 break; 1002 case 5: 1003 passed &= !rc; 1004 passed &= (args.args_count == 2); 1005 passed &= (args.args[0] == 13); 1006 passed &= (args.args[1] == 14); 1007 break; 1008 case 6: 1009 passed &= !rc; 1010 passed &= (args.args_count == 1); 1011 passed &= (args.args[0] == 15); 1012 break; 1013 default: 1014 passed = false; 1015 } 1016 1017 unittest(passed, "index %i - data error on node %pOF rc=%i\n", 1018 i, args.np, rc); 1019 } 1020 of_node_put(np); 1021 } 1022 1023 static const struct of_device_id match_node_table[] = { 1024 { .data = "A", .name = "name0", }, /* Name alone is lowest priority */ 1025 { .data = "B", .type = "type1", }, /* followed by type alone */ 1026 1027 { .data = "Ca", .name = "name2", .type = "type1", }, /* followed by both together */ 1028 { .data = "Cb", .name = "name2", }, /* Only match when type doesn't match */ 1029 { .data = "Cc", .name = "name2", .type = "type2", }, 1030 1031 { .data = "E", .compatible = "compat3" }, 1032 { .data = "G", .compatible = "compat2", }, 1033 { .data = "H", .compatible = "compat2", .name = "name5", }, 1034 { .data = "I", .compatible = "compat2", .type = "type1", }, 1035 { .data = "J", .compatible = "compat2", .type = "type1", .name = "name8", }, 1036 { .data = "K", .compatible = "compat2", .name = "name9", }, 1037 {} 1038 }; 1039 1040 static struct { 1041 const char *path; 1042 const char *data; 1043 } match_node_tests[] = { 1044 { .path = "/testcase-data/match-node/name0", .data = "A", }, 1045 { .path = "/testcase-data/match-node/name1", .data = "B", }, 1046 { .path = "/testcase-data/match-node/a/name2", .data = "Ca", }, 1047 { .path = "/testcase-data/match-node/b/name2", .data = "Cb", }, 1048 { .path = "/testcase-data/match-node/c/name2", .data = "Cc", }, 1049 { .path = "/testcase-data/match-node/name3", .data = "E", }, 1050 { .path = "/testcase-data/match-node/name4", .data = "G", }, 1051 { .path = "/testcase-data/match-node/name5", .data = "H", }, 1052 { .path = "/testcase-data/match-node/name6", .data = "G", }, 1053 { .path = "/testcase-data/match-node/name7", .data = "I", }, 1054 { .path = "/testcase-data/match-node/name8", .data = "J", }, 1055 { .path = "/testcase-data/match-node/name9", .data = "K", }, 1056 }; 1057 1058 static void __init of_unittest_match_node(void) 1059 { 1060 struct device_node *np; 1061 const struct of_device_id *match; 1062 int i; 1063 1064 for (i = 0; i < ARRAY_SIZE(match_node_tests); i++) { 1065 np = of_find_node_by_path(match_node_tests[i].path); 1066 if (!np) { 1067 unittest(0, "missing testcase node %s\n", 1068 match_node_tests[i].path); 1069 continue; 1070 } 1071 1072 match = of_match_node(match_node_table, np); 1073 if (!match) { 1074 unittest(0, "%s didn't match anything\n", 1075 match_node_tests[i].path); 1076 continue; 1077 } 1078 1079 if (strcmp(match->data, match_node_tests[i].data) != 0) { 1080 unittest(0, "%s got wrong match. expected %s, got %s\n", 1081 match_node_tests[i].path, match_node_tests[i].data, 1082 (const char *)match->data); 1083 continue; 1084 } 1085 unittest(1, "passed"); 1086 } 1087 } 1088 1089 static struct resource test_bus_res = { 1090 .start = 0xfffffff8, 1091 .end = 0xfffffff9, 1092 .flags = IORESOURCE_MEM, 1093 }; 1094 static const struct platform_device_info test_bus_info = { 1095 .name = "unittest-bus", 1096 }; 1097 static void __init of_unittest_platform_populate(void) 1098 { 1099 int irq, rc; 1100 struct device_node *np, *child, *grandchild; 1101 struct platform_device *pdev, *test_bus; 1102 const struct of_device_id match[] = { 1103 { .compatible = "test-device", }, 1104 {} 1105 }; 1106 1107 np = of_find_node_by_path("/testcase-data"); 1108 of_platform_default_populate(np, NULL, NULL); 1109 1110 /* Test that a missing irq domain returns -EPROBE_DEFER */ 1111 np = of_find_node_by_path("/testcase-data/testcase-device1"); 1112 pdev = of_find_device_by_node(np); 1113 unittest(pdev, "device 1 creation failed\n"); 1114 1115 if (!(of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)) { 1116 irq = platform_get_irq(pdev, 0); 1117 unittest(irq == -EPROBE_DEFER, 1118 "device deferred probe failed - %d\n", irq); 1119 1120 /* Test that a parsing failure does not return -EPROBE_DEFER */ 1121 np = of_find_node_by_path("/testcase-data/testcase-device2"); 1122 pdev = of_find_device_by_node(np); 1123 unittest(pdev, "device 2 creation failed\n"); 1124 irq = platform_get_irq(pdev, 0); 1125 unittest(irq < 0 && irq != -EPROBE_DEFER, 1126 "device parsing error failed - %d\n", irq); 1127 } 1128 1129 np = of_find_node_by_path("/testcase-data/platform-tests"); 1130 unittest(np, "No testcase data in device tree\n"); 1131 if (!np) 1132 return; 1133 1134 test_bus = platform_device_register_full(&test_bus_info); 1135 rc = PTR_ERR_OR_ZERO(test_bus); 1136 unittest(!rc, "testbus registration failed; rc=%i\n", rc); 1137 if (rc) { 1138 of_node_put(np); 1139 return; 1140 } 1141 test_bus->dev.of_node = np; 1142 1143 /* 1144 * Add a dummy resource to the test bus node after it is 1145 * registered to catch problems with un-inserted resources. The 1146 * DT code doesn't insert the resources, and it has caused the 1147 * kernel to oops in the past. This makes sure the same bug 1148 * doesn't crop up again. 1149 */ 1150 platform_device_add_resources(test_bus, &test_bus_res, 1); 1151 1152 of_platform_populate(np, match, NULL, &test_bus->dev); 1153 for_each_child_of_node(np, child) { 1154 for_each_child_of_node(child, grandchild) 1155 unittest(of_find_device_by_node(grandchild), 1156 "Could not create device for node '%pOFn'\n", 1157 grandchild); 1158 } 1159 1160 of_platform_depopulate(&test_bus->dev); 1161 for_each_child_of_node(np, child) { 1162 for_each_child_of_node(child, grandchild) 1163 unittest(!of_find_device_by_node(grandchild), 1164 "device didn't get destroyed '%pOFn'\n", 1165 grandchild); 1166 } 1167 1168 platform_device_unregister(test_bus); 1169 of_node_put(np); 1170 } 1171 1172 /** 1173 * update_node_properties - adds the properties 1174 * of np into dup node (present in live tree) and 1175 * updates parent of children of np to dup. 1176 * 1177 * @np: node whose properties are being added to the live tree 1178 * @dup: node present in live tree to be updated 1179 */ 1180 static void update_node_properties(struct device_node *np, 1181 struct device_node *dup) 1182 { 1183 struct property *prop; 1184 struct property *save_next; 1185 struct device_node *child; 1186 int ret; 1187 1188 for_each_child_of_node(np, child) 1189 child->parent = dup; 1190 1191 /* 1192 * "unittest internal error: unable to add testdata property" 1193 * 1194 * If this message reports a property in node '/__symbols__' then 1195 * the respective unittest overlay contains a label that has the 1196 * same name as a label in the live devicetree. The label will 1197 * be in the live devicetree only if the devicetree source was 1198 * compiled with the '-@' option. If you encounter this error, 1199 * please consider renaming __all__ of the labels in the unittest 1200 * overlay dts files with an odd prefix that is unlikely to be 1201 * used in a real devicetree. 1202 */ 1203 1204 /* 1205 * open code for_each_property_of_node() because of_add_property() 1206 * sets prop->next to NULL 1207 */ 1208 for (prop = np->properties; prop != NULL; prop = save_next) { 1209 save_next = prop->next; 1210 ret = of_add_property(dup, prop); 1211 if (ret) { 1212 if (ret == -EEXIST && !strcmp(prop->name, "name")) 1213 continue; 1214 pr_err("unittest internal error: unable to add testdata property %pOF/%s", 1215 np, prop->name); 1216 } 1217 } 1218 } 1219 1220 /** 1221 * attach_node_and_children - attaches nodes 1222 * and its children to live tree. 1223 * CAUTION: misleading function name - if node @np already exists in 1224 * the live tree then children of @np are *not* attached to the live 1225 * tree. This works for the current test devicetree nodes because such 1226 * nodes do not have child nodes. 1227 * 1228 * @np: Node to attach to live tree 1229 */ 1230 static void attach_node_and_children(struct device_node *np) 1231 { 1232 struct device_node *next, *dup, *child; 1233 unsigned long flags; 1234 const char *full_name; 1235 1236 full_name = kasprintf(GFP_KERNEL, "%pOF", np); 1237 1238 if (!strcmp(full_name, "/__local_fixups__") || 1239 !strcmp(full_name, "/__fixups__")) 1240 return; 1241 1242 dup = of_find_node_by_path(full_name); 1243 kfree(full_name); 1244 if (dup) { 1245 update_node_properties(np, dup); 1246 return; 1247 } 1248 1249 child = np->child; 1250 np->child = NULL; 1251 1252 mutex_lock(&of_mutex); 1253 raw_spin_lock_irqsave(&devtree_lock, flags); 1254 np->sibling = np->parent->child; 1255 np->parent->child = np; 1256 of_node_clear_flag(np, OF_DETACHED); 1257 raw_spin_unlock_irqrestore(&devtree_lock, flags); 1258 1259 __of_attach_node_sysfs(np); 1260 mutex_unlock(&of_mutex); 1261 1262 while (child) { 1263 next = child->sibling; 1264 attach_node_and_children(child); 1265 child = next; 1266 } 1267 } 1268 1269 /** 1270 * unittest_data_add - Reads, copies data from 1271 * linked tree and attaches it to the live tree 1272 */ 1273 static int __init unittest_data_add(void) 1274 { 1275 void *unittest_data; 1276 struct device_node *unittest_data_node, *np; 1277 /* 1278 * __dtb_testcases_begin[] and __dtb_testcases_end[] are magically 1279 * created by cmd_dt_S_dtb in scripts/Makefile.lib 1280 */ 1281 extern uint8_t __dtb_testcases_begin[]; 1282 extern uint8_t __dtb_testcases_end[]; 1283 const int size = __dtb_testcases_end - __dtb_testcases_begin; 1284 int rc; 1285 1286 if (!size) { 1287 pr_warn("%s: No testcase data to attach; not running tests\n", 1288 __func__); 1289 return -ENODATA; 1290 } 1291 1292 /* creating copy */ 1293 unittest_data = kmemdup(__dtb_testcases_begin, size, GFP_KERNEL); 1294 if (!unittest_data) 1295 return -ENOMEM; 1296 1297 of_fdt_unflatten_tree(unittest_data, NULL, &unittest_data_node); 1298 if (!unittest_data_node) { 1299 pr_warn("%s: No tree to attach; not running tests\n", __func__); 1300 kfree(unittest_data); 1301 return -ENODATA; 1302 } 1303 1304 /* 1305 * This lock normally encloses of_resolve_phandles() 1306 */ 1307 of_overlay_mutex_lock(); 1308 1309 rc = of_resolve_phandles(unittest_data_node); 1310 if (rc) { 1311 pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__, rc); 1312 of_overlay_mutex_unlock(); 1313 return -EINVAL; 1314 } 1315 1316 if (!of_root) { 1317 of_root = unittest_data_node; 1318 for_each_of_allnodes(np) 1319 __of_attach_node_sysfs(np); 1320 of_aliases = of_find_node_by_path("/aliases"); 1321 of_chosen = of_find_node_by_path("/chosen"); 1322 of_overlay_mutex_unlock(); 1323 return 0; 1324 } 1325 1326 /* attach the sub-tree to live tree */ 1327 np = unittest_data_node->child; 1328 while (np) { 1329 struct device_node *next = np->sibling; 1330 1331 np->parent = of_root; 1332 attach_node_and_children(np); 1333 np = next; 1334 } 1335 1336 of_overlay_mutex_unlock(); 1337 1338 return 0; 1339 } 1340 1341 #ifdef CONFIG_OF_OVERLAY 1342 static int __init overlay_data_apply(const char *overlay_name, int *overlay_id); 1343 1344 static int unittest_probe(struct platform_device *pdev) 1345 { 1346 struct device *dev = &pdev->dev; 1347 struct device_node *np = dev->of_node; 1348 1349 if (np == NULL) { 1350 dev_err(dev, "No OF data for device\n"); 1351 return -EINVAL; 1352 1353 } 1354 1355 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 1356 1357 of_platform_populate(np, NULL, NULL, &pdev->dev); 1358 1359 return 0; 1360 } 1361 1362 static int unittest_remove(struct platform_device *pdev) 1363 { 1364 struct device *dev = &pdev->dev; 1365 struct device_node *np = dev->of_node; 1366 1367 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 1368 return 0; 1369 } 1370 1371 static const struct of_device_id unittest_match[] = { 1372 { .compatible = "unittest", }, 1373 {}, 1374 }; 1375 1376 static struct platform_driver unittest_driver = { 1377 .probe = unittest_probe, 1378 .remove = unittest_remove, 1379 .driver = { 1380 .name = "unittest", 1381 .of_match_table = of_match_ptr(unittest_match), 1382 }, 1383 }; 1384 1385 /* get the platform device instantiated at the path */ 1386 static struct platform_device *of_path_to_platform_device(const char *path) 1387 { 1388 struct device_node *np; 1389 struct platform_device *pdev; 1390 1391 np = of_find_node_by_path(path); 1392 if (np == NULL) 1393 return NULL; 1394 1395 pdev = of_find_device_by_node(np); 1396 of_node_put(np); 1397 1398 return pdev; 1399 } 1400 1401 /* find out if a platform device exists at that path */ 1402 static int of_path_platform_device_exists(const char *path) 1403 { 1404 struct platform_device *pdev; 1405 1406 pdev = of_path_to_platform_device(path); 1407 platform_device_put(pdev); 1408 return pdev != NULL; 1409 } 1410 1411 #if IS_BUILTIN(CONFIG_I2C) 1412 1413 /* get the i2c client device instantiated at the path */ 1414 static struct i2c_client *of_path_to_i2c_client(const char *path) 1415 { 1416 struct device_node *np; 1417 struct i2c_client *client; 1418 1419 np = of_find_node_by_path(path); 1420 if (np == NULL) 1421 return NULL; 1422 1423 client = of_find_i2c_device_by_node(np); 1424 of_node_put(np); 1425 1426 return client; 1427 } 1428 1429 /* find out if a i2c client device exists at that path */ 1430 static int of_path_i2c_client_exists(const char *path) 1431 { 1432 struct i2c_client *client; 1433 1434 client = of_path_to_i2c_client(path); 1435 if (client) 1436 put_device(&client->dev); 1437 return client != NULL; 1438 } 1439 #else 1440 static int of_path_i2c_client_exists(const char *path) 1441 { 1442 return 0; 1443 } 1444 #endif 1445 1446 enum overlay_type { 1447 PDEV_OVERLAY, 1448 I2C_OVERLAY 1449 }; 1450 1451 static int of_path_device_type_exists(const char *path, 1452 enum overlay_type ovtype) 1453 { 1454 switch (ovtype) { 1455 case PDEV_OVERLAY: 1456 return of_path_platform_device_exists(path); 1457 case I2C_OVERLAY: 1458 return of_path_i2c_client_exists(path); 1459 } 1460 return 0; 1461 } 1462 1463 static const char *unittest_path(int nr, enum overlay_type ovtype) 1464 { 1465 const char *base; 1466 static char buf[256]; 1467 1468 switch (ovtype) { 1469 case PDEV_OVERLAY: 1470 base = "/testcase-data/overlay-node/test-bus"; 1471 break; 1472 case I2C_OVERLAY: 1473 base = "/testcase-data/overlay-node/test-bus/i2c-test-bus"; 1474 break; 1475 default: 1476 buf[0] = '\0'; 1477 return buf; 1478 } 1479 snprintf(buf, sizeof(buf) - 1, "%s/test-unittest%d", base, nr); 1480 buf[sizeof(buf) - 1] = '\0'; 1481 return buf; 1482 } 1483 1484 static int of_unittest_device_exists(int unittest_nr, enum overlay_type ovtype) 1485 { 1486 const char *path; 1487 1488 path = unittest_path(unittest_nr, ovtype); 1489 1490 switch (ovtype) { 1491 case PDEV_OVERLAY: 1492 return of_path_platform_device_exists(path); 1493 case I2C_OVERLAY: 1494 return of_path_i2c_client_exists(path); 1495 } 1496 return 0; 1497 } 1498 1499 static const char *overlay_name_from_nr(int nr) 1500 { 1501 static char buf[256]; 1502 1503 snprintf(buf, sizeof(buf) - 1, 1504 "overlay_%d", nr); 1505 buf[sizeof(buf) - 1] = '\0'; 1506 1507 return buf; 1508 } 1509 1510 static const char *bus_path = "/testcase-data/overlay-node/test-bus"; 1511 1512 /* it is guaranteed that overlay ids are assigned in sequence */ 1513 #define MAX_UNITTEST_OVERLAYS 256 1514 static unsigned long overlay_id_bits[BITS_TO_LONGS(MAX_UNITTEST_OVERLAYS)]; 1515 static int overlay_first_id = -1; 1516 1517 static void of_unittest_track_overlay(int id) 1518 { 1519 if (overlay_first_id < 0) 1520 overlay_first_id = id; 1521 id -= overlay_first_id; 1522 1523 /* we shouldn't need that many */ 1524 BUG_ON(id >= MAX_UNITTEST_OVERLAYS); 1525 overlay_id_bits[BIT_WORD(id)] |= BIT_MASK(id); 1526 } 1527 1528 static void of_unittest_untrack_overlay(int id) 1529 { 1530 if (overlay_first_id < 0) 1531 return; 1532 id -= overlay_first_id; 1533 BUG_ON(id >= MAX_UNITTEST_OVERLAYS); 1534 overlay_id_bits[BIT_WORD(id)] &= ~BIT_MASK(id); 1535 } 1536 1537 static void of_unittest_destroy_tracked_overlays(void) 1538 { 1539 int id, ret, defers, ovcs_id; 1540 1541 if (overlay_first_id < 0) 1542 return; 1543 1544 /* try until no defers */ 1545 do { 1546 defers = 0; 1547 /* remove in reverse order */ 1548 for (id = MAX_UNITTEST_OVERLAYS - 1; id >= 0; id--) { 1549 if (!(overlay_id_bits[BIT_WORD(id)] & BIT_MASK(id))) 1550 continue; 1551 1552 ovcs_id = id + overlay_first_id; 1553 ret = of_overlay_remove(&ovcs_id); 1554 if (ret == -ENODEV) { 1555 pr_warn("%s: no overlay to destroy for #%d\n", 1556 __func__, id + overlay_first_id); 1557 continue; 1558 } 1559 if (ret != 0) { 1560 defers++; 1561 pr_warn("%s: overlay destroy failed for #%d\n", 1562 __func__, id + overlay_first_id); 1563 continue; 1564 } 1565 1566 overlay_id_bits[BIT_WORD(id)] &= ~BIT_MASK(id); 1567 } 1568 } while (defers > 0); 1569 } 1570 1571 static int __init of_unittest_apply_overlay(int overlay_nr, int *overlay_id) 1572 { 1573 const char *overlay_name; 1574 1575 overlay_name = overlay_name_from_nr(overlay_nr); 1576 1577 if (!overlay_data_apply(overlay_name, overlay_id)) { 1578 unittest(0, "could not apply overlay \"%s\"\n", 1579 overlay_name); 1580 return -EFAULT; 1581 } 1582 of_unittest_track_overlay(*overlay_id); 1583 1584 return 0; 1585 } 1586 1587 /* apply an overlay while checking before and after states */ 1588 static int __init of_unittest_apply_overlay_check(int overlay_nr, 1589 int unittest_nr, int before, int after, 1590 enum overlay_type ovtype) 1591 { 1592 int ret, ovcs_id; 1593 1594 /* unittest device must not be in before state */ 1595 if (of_unittest_device_exists(unittest_nr, ovtype) != before) { 1596 unittest(0, "%s with device @\"%s\" %s\n", 1597 overlay_name_from_nr(overlay_nr), 1598 unittest_path(unittest_nr, ovtype), 1599 !before ? "enabled" : "disabled"); 1600 return -EINVAL; 1601 } 1602 1603 ovcs_id = 0; 1604 ret = of_unittest_apply_overlay(overlay_nr, &ovcs_id); 1605 if (ret != 0) { 1606 /* of_unittest_apply_overlay already called unittest() */ 1607 return ret; 1608 } 1609 1610 /* unittest device must be to set to after state */ 1611 if (of_unittest_device_exists(unittest_nr, ovtype) != after) { 1612 unittest(0, "%s failed to create @\"%s\" %s\n", 1613 overlay_name_from_nr(overlay_nr), 1614 unittest_path(unittest_nr, ovtype), 1615 !after ? "enabled" : "disabled"); 1616 return -EINVAL; 1617 } 1618 1619 return 0; 1620 } 1621 1622 /* apply an overlay and then revert it while checking before, after states */ 1623 static int __init of_unittest_apply_revert_overlay_check(int overlay_nr, 1624 int unittest_nr, int before, int after, 1625 enum overlay_type ovtype) 1626 { 1627 int ret, ovcs_id; 1628 1629 /* unittest device must be in before state */ 1630 if (of_unittest_device_exists(unittest_nr, ovtype) != before) { 1631 unittest(0, "%s with device @\"%s\" %s\n", 1632 overlay_name_from_nr(overlay_nr), 1633 unittest_path(unittest_nr, ovtype), 1634 !before ? "enabled" : "disabled"); 1635 return -EINVAL; 1636 } 1637 1638 /* apply the overlay */ 1639 ovcs_id = 0; 1640 ret = of_unittest_apply_overlay(overlay_nr, &ovcs_id); 1641 if (ret != 0) { 1642 /* of_unittest_apply_overlay already called unittest() */ 1643 return ret; 1644 } 1645 1646 /* unittest device must be in after state */ 1647 if (of_unittest_device_exists(unittest_nr, ovtype) != after) { 1648 unittest(0, "%s failed to create @\"%s\" %s\n", 1649 overlay_name_from_nr(overlay_nr), 1650 unittest_path(unittest_nr, ovtype), 1651 !after ? "enabled" : "disabled"); 1652 return -EINVAL; 1653 } 1654 1655 ret = of_overlay_remove(&ovcs_id); 1656 if (ret != 0) { 1657 unittest(0, "%s failed to be destroyed @\"%s\"\n", 1658 overlay_name_from_nr(overlay_nr), 1659 unittest_path(unittest_nr, ovtype)); 1660 return ret; 1661 } 1662 1663 /* unittest device must be again in before state */ 1664 if (of_unittest_device_exists(unittest_nr, PDEV_OVERLAY) != before) { 1665 unittest(0, "%s with device @\"%s\" %s\n", 1666 overlay_name_from_nr(overlay_nr), 1667 unittest_path(unittest_nr, ovtype), 1668 !before ? "enabled" : "disabled"); 1669 return -EINVAL; 1670 } 1671 1672 return 0; 1673 } 1674 1675 /* test activation of device */ 1676 static void __init of_unittest_overlay_0(void) 1677 { 1678 /* device should enable */ 1679 if (of_unittest_apply_overlay_check(0, 0, 0, 1, PDEV_OVERLAY)) 1680 return; 1681 1682 unittest(1, "overlay test %d passed\n", 0); 1683 } 1684 1685 /* test deactivation of device */ 1686 static void __init of_unittest_overlay_1(void) 1687 { 1688 /* device should disable */ 1689 if (of_unittest_apply_overlay_check(1, 1, 1, 0, PDEV_OVERLAY)) 1690 return; 1691 1692 unittest(1, "overlay test %d passed\n", 1); 1693 } 1694 1695 /* test activation of device */ 1696 static void __init of_unittest_overlay_2(void) 1697 { 1698 /* device should enable */ 1699 if (of_unittest_apply_overlay_check(2, 2, 0, 1, PDEV_OVERLAY)) 1700 return; 1701 1702 unittest(1, "overlay test %d passed\n", 2); 1703 } 1704 1705 /* test deactivation of device */ 1706 static void __init of_unittest_overlay_3(void) 1707 { 1708 /* device should disable */ 1709 if (of_unittest_apply_overlay_check(3, 3, 1, 0, PDEV_OVERLAY)) 1710 return; 1711 1712 unittest(1, "overlay test %d passed\n", 3); 1713 } 1714 1715 /* test activation of a full device node */ 1716 static void __init of_unittest_overlay_4(void) 1717 { 1718 /* device should disable */ 1719 if (of_unittest_apply_overlay_check(4, 4, 0, 1, PDEV_OVERLAY)) 1720 return; 1721 1722 unittest(1, "overlay test %d passed\n", 4); 1723 } 1724 1725 /* test overlay apply/revert sequence */ 1726 static void __init of_unittest_overlay_5(void) 1727 { 1728 /* device should disable */ 1729 if (of_unittest_apply_revert_overlay_check(5, 5, 0, 1, PDEV_OVERLAY)) 1730 return; 1731 1732 unittest(1, "overlay test %d passed\n", 5); 1733 } 1734 1735 /* test overlay application in sequence */ 1736 static void __init of_unittest_overlay_6(void) 1737 { 1738 int i, ov_id[2], ovcs_id; 1739 int overlay_nr = 6, unittest_nr = 6; 1740 int before = 0, after = 1; 1741 const char *overlay_name; 1742 1743 /* unittest device must be in before state */ 1744 for (i = 0; i < 2; i++) { 1745 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY) 1746 != before) { 1747 unittest(0, "%s with device @\"%s\" %s\n", 1748 overlay_name_from_nr(overlay_nr + i), 1749 unittest_path(unittest_nr + i, 1750 PDEV_OVERLAY), 1751 !before ? "enabled" : "disabled"); 1752 return; 1753 } 1754 } 1755 1756 /* apply the overlays */ 1757 for (i = 0; i < 2; i++) { 1758 1759 overlay_name = overlay_name_from_nr(overlay_nr + i); 1760 1761 if (!overlay_data_apply(overlay_name, &ovcs_id)) { 1762 unittest(0, "could not apply overlay \"%s\"\n", 1763 overlay_name); 1764 return; 1765 } 1766 ov_id[i] = ovcs_id; 1767 of_unittest_track_overlay(ov_id[i]); 1768 } 1769 1770 for (i = 0; i < 2; i++) { 1771 /* unittest device must be in after state */ 1772 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY) 1773 != after) { 1774 unittest(0, "overlay @\"%s\" failed @\"%s\" %s\n", 1775 overlay_name_from_nr(overlay_nr + i), 1776 unittest_path(unittest_nr + i, 1777 PDEV_OVERLAY), 1778 !after ? "enabled" : "disabled"); 1779 return; 1780 } 1781 } 1782 1783 for (i = 1; i >= 0; i--) { 1784 ovcs_id = ov_id[i]; 1785 if (of_overlay_remove(&ovcs_id)) { 1786 unittest(0, "%s failed destroy @\"%s\"\n", 1787 overlay_name_from_nr(overlay_nr + i), 1788 unittest_path(unittest_nr + i, 1789 PDEV_OVERLAY)); 1790 return; 1791 } 1792 of_unittest_untrack_overlay(ov_id[i]); 1793 } 1794 1795 for (i = 0; i < 2; i++) { 1796 /* unittest device must be again in before state */ 1797 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY) 1798 != before) { 1799 unittest(0, "%s with device @\"%s\" %s\n", 1800 overlay_name_from_nr(overlay_nr + i), 1801 unittest_path(unittest_nr + i, 1802 PDEV_OVERLAY), 1803 !before ? "enabled" : "disabled"); 1804 return; 1805 } 1806 } 1807 1808 unittest(1, "overlay test %d passed\n", 6); 1809 } 1810 1811 /* test overlay application in sequence */ 1812 static void __init of_unittest_overlay_8(void) 1813 { 1814 int i, ov_id[2], ovcs_id; 1815 int overlay_nr = 8, unittest_nr = 8; 1816 const char *overlay_name; 1817 1818 /* we don't care about device state in this test */ 1819 1820 /* apply the overlays */ 1821 for (i = 0; i < 2; i++) { 1822 1823 overlay_name = overlay_name_from_nr(overlay_nr + i); 1824 1825 if (!overlay_data_apply(overlay_name, &ovcs_id)) { 1826 unittest(0, "could not apply overlay \"%s\"\n", 1827 overlay_name); 1828 return; 1829 } 1830 ov_id[i] = ovcs_id; 1831 of_unittest_track_overlay(ov_id[i]); 1832 } 1833 1834 /* now try to remove first overlay (it should fail) */ 1835 ovcs_id = ov_id[0]; 1836 if (!of_overlay_remove(&ovcs_id)) { 1837 unittest(0, "%s was destroyed @\"%s\"\n", 1838 overlay_name_from_nr(overlay_nr + 0), 1839 unittest_path(unittest_nr, 1840 PDEV_OVERLAY)); 1841 return; 1842 } 1843 1844 /* removing them in order should work */ 1845 for (i = 1; i >= 0; i--) { 1846 ovcs_id = ov_id[i]; 1847 if (of_overlay_remove(&ovcs_id)) { 1848 unittest(0, "%s not destroyed @\"%s\"\n", 1849 overlay_name_from_nr(overlay_nr + i), 1850 unittest_path(unittest_nr, 1851 PDEV_OVERLAY)); 1852 return; 1853 } 1854 of_unittest_untrack_overlay(ov_id[i]); 1855 } 1856 1857 unittest(1, "overlay test %d passed\n", 8); 1858 } 1859 1860 /* test insertion of a bus with parent devices */ 1861 static void __init of_unittest_overlay_10(void) 1862 { 1863 int ret; 1864 char *child_path; 1865 1866 /* device should disable */ 1867 ret = of_unittest_apply_overlay_check(10, 10, 0, 1, PDEV_OVERLAY); 1868 if (unittest(ret == 0, 1869 "overlay test %d failed; overlay application\n", 10)) 1870 return; 1871 1872 child_path = kasprintf(GFP_KERNEL, "%s/test-unittest101", 1873 unittest_path(10, PDEV_OVERLAY)); 1874 if (unittest(child_path, "overlay test %d failed; kasprintf\n", 10)) 1875 return; 1876 1877 ret = of_path_device_type_exists(child_path, PDEV_OVERLAY); 1878 kfree(child_path); 1879 1880 unittest(ret, "overlay test %d failed; no child device\n", 10); 1881 } 1882 1883 /* test insertion of a bus with parent devices (and revert) */ 1884 static void __init of_unittest_overlay_11(void) 1885 { 1886 int ret; 1887 1888 /* device should disable */ 1889 ret = of_unittest_apply_revert_overlay_check(11, 11, 0, 1, 1890 PDEV_OVERLAY); 1891 unittest(ret == 0, "overlay test %d failed; overlay apply\n", 11); 1892 } 1893 1894 #if IS_BUILTIN(CONFIG_I2C) && IS_ENABLED(CONFIG_OF_OVERLAY) 1895 1896 struct unittest_i2c_bus_data { 1897 struct platform_device *pdev; 1898 struct i2c_adapter adap; 1899 }; 1900 1901 static int unittest_i2c_master_xfer(struct i2c_adapter *adap, 1902 struct i2c_msg *msgs, int num) 1903 { 1904 struct unittest_i2c_bus_data *std = i2c_get_adapdata(adap); 1905 1906 (void)std; 1907 1908 return num; 1909 } 1910 1911 static u32 unittest_i2c_functionality(struct i2c_adapter *adap) 1912 { 1913 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; 1914 } 1915 1916 static const struct i2c_algorithm unittest_i2c_algo = { 1917 .master_xfer = unittest_i2c_master_xfer, 1918 .functionality = unittest_i2c_functionality, 1919 }; 1920 1921 static int unittest_i2c_bus_probe(struct platform_device *pdev) 1922 { 1923 struct device *dev = &pdev->dev; 1924 struct device_node *np = dev->of_node; 1925 struct unittest_i2c_bus_data *std; 1926 struct i2c_adapter *adap; 1927 int ret; 1928 1929 if (np == NULL) { 1930 dev_err(dev, "No OF data for device\n"); 1931 return -EINVAL; 1932 1933 } 1934 1935 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 1936 1937 std = devm_kzalloc(dev, sizeof(*std), GFP_KERNEL); 1938 if (!std) 1939 return -ENOMEM; 1940 1941 /* link them together */ 1942 std->pdev = pdev; 1943 platform_set_drvdata(pdev, std); 1944 1945 adap = &std->adap; 1946 i2c_set_adapdata(adap, std); 1947 adap->nr = -1; 1948 strlcpy(adap->name, pdev->name, sizeof(adap->name)); 1949 adap->class = I2C_CLASS_DEPRECATED; 1950 adap->algo = &unittest_i2c_algo; 1951 adap->dev.parent = dev; 1952 adap->dev.of_node = dev->of_node; 1953 adap->timeout = 5 * HZ; 1954 adap->retries = 3; 1955 1956 ret = i2c_add_numbered_adapter(adap); 1957 if (ret != 0) { 1958 dev_err(dev, "Failed to add I2C adapter\n"); 1959 return ret; 1960 } 1961 1962 return 0; 1963 } 1964 1965 static int unittest_i2c_bus_remove(struct platform_device *pdev) 1966 { 1967 struct device *dev = &pdev->dev; 1968 struct device_node *np = dev->of_node; 1969 struct unittest_i2c_bus_data *std = platform_get_drvdata(pdev); 1970 1971 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 1972 i2c_del_adapter(&std->adap); 1973 1974 return 0; 1975 } 1976 1977 static const struct of_device_id unittest_i2c_bus_match[] = { 1978 { .compatible = "unittest-i2c-bus", }, 1979 {}, 1980 }; 1981 1982 static struct platform_driver unittest_i2c_bus_driver = { 1983 .probe = unittest_i2c_bus_probe, 1984 .remove = unittest_i2c_bus_remove, 1985 .driver = { 1986 .name = "unittest-i2c-bus", 1987 .of_match_table = of_match_ptr(unittest_i2c_bus_match), 1988 }, 1989 }; 1990 1991 static int unittest_i2c_dev_probe(struct i2c_client *client, 1992 const struct i2c_device_id *id) 1993 { 1994 struct device *dev = &client->dev; 1995 struct device_node *np = client->dev.of_node; 1996 1997 if (!np) { 1998 dev_err(dev, "No OF node\n"); 1999 return -EINVAL; 2000 } 2001 2002 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 2003 2004 return 0; 2005 }; 2006 2007 static int unittest_i2c_dev_remove(struct i2c_client *client) 2008 { 2009 struct device *dev = &client->dev; 2010 struct device_node *np = client->dev.of_node; 2011 2012 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 2013 return 0; 2014 } 2015 2016 static const struct i2c_device_id unittest_i2c_dev_id[] = { 2017 { .name = "unittest-i2c-dev" }, 2018 { } 2019 }; 2020 2021 static struct i2c_driver unittest_i2c_dev_driver = { 2022 .driver = { 2023 .name = "unittest-i2c-dev", 2024 }, 2025 .probe = unittest_i2c_dev_probe, 2026 .remove = unittest_i2c_dev_remove, 2027 .id_table = unittest_i2c_dev_id, 2028 }; 2029 2030 #if IS_BUILTIN(CONFIG_I2C_MUX) 2031 2032 static int unittest_i2c_mux_select_chan(struct i2c_mux_core *muxc, u32 chan) 2033 { 2034 return 0; 2035 } 2036 2037 static int unittest_i2c_mux_probe(struct i2c_client *client, 2038 const struct i2c_device_id *id) 2039 { 2040 int i, nchans; 2041 struct device *dev = &client->dev; 2042 struct i2c_adapter *adap = client->adapter; 2043 struct device_node *np = client->dev.of_node, *child; 2044 struct i2c_mux_core *muxc; 2045 u32 reg, max_reg; 2046 2047 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 2048 2049 if (!np) { 2050 dev_err(dev, "No OF node\n"); 2051 return -EINVAL; 2052 } 2053 2054 max_reg = (u32)-1; 2055 for_each_child_of_node(np, child) { 2056 if (of_property_read_u32(child, "reg", ®)) 2057 continue; 2058 if (max_reg == (u32)-1 || reg > max_reg) 2059 max_reg = reg; 2060 } 2061 nchans = max_reg == (u32)-1 ? 0 : max_reg + 1; 2062 if (nchans == 0) { 2063 dev_err(dev, "No channels\n"); 2064 return -EINVAL; 2065 } 2066 2067 muxc = i2c_mux_alloc(adap, dev, nchans, 0, 0, 2068 unittest_i2c_mux_select_chan, NULL); 2069 if (!muxc) 2070 return -ENOMEM; 2071 for (i = 0; i < nchans; i++) { 2072 if (i2c_mux_add_adapter(muxc, 0, i, 0)) { 2073 dev_err(dev, "Failed to register mux #%d\n", i); 2074 i2c_mux_del_adapters(muxc); 2075 return -ENODEV; 2076 } 2077 } 2078 2079 i2c_set_clientdata(client, muxc); 2080 2081 return 0; 2082 }; 2083 2084 static int unittest_i2c_mux_remove(struct i2c_client *client) 2085 { 2086 struct device *dev = &client->dev; 2087 struct device_node *np = client->dev.of_node; 2088 struct i2c_mux_core *muxc = i2c_get_clientdata(client); 2089 2090 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 2091 i2c_mux_del_adapters(muxc); 2092 return 0; 2093 } 2094 2095 static const struct i2c_device_id unittest_i2c_mux_id[] = { 2096 { .name = "unittest-i2c-mux" }, 2097 { } 2098 }; 2099 2100 static struct i2c_driver unittest_i2c_mux_driver = { 2101 .driver = { 2102 .name = "unittest-i2c-mux", 2103 }, 2104 .probe = unittest_i2c_mux_probe, 2105 .remove = unittest_i2c_mux_remove, 2106 .id_table = unittest_i2c_mux_id, 2107 }; 2108 2109 #endif 2110 2111 static int of_unittest_overlay_i2c_init(void) 2112 { 2113 int ret; 2114 2115 ret = i2c_add_driver(&unittest_i2c_dev_driver); 2116 if (unittest(ret == 0, 2117 "could not register unittest i2c device driver\n")) 2118 return ret; 2119 2120 ret = platform_driver_register(&unittest_i2c_bus_driver); 2121 if (unittest(ret == 0, 2122 "could not register unittest i2c bus driver\n")) 2123 return ret; 2124 2125 #if IS_BUILTIN(CONFIG_I2C_MUX) 2126 ret = i2c_add_driver(&unittest_i2c_mux_driver); 2127 if (unittest(ret == 0, 2128 "could not register unittest i2c mux driver\n")) 2129 return ret; 2130 #endif 2131 2132 return 0; 2133 } 2134 2135 static void of_unittest_overlay_i2c_cleanup(void) 2136 { 2137 #if IS_BUILTIN(CONFIG_I2C_MUX) 2138 i2c_del_driver(&unittest_i2c_mux_driver); 2139 #endif 2140 platform_driver_unregister(&unittest_i2c_bus_driver); 2141 i2c_del_driver(&unittest_i2c_dev_driver); 2142 } 2143 2144 static void __init of_unittest_overlay_i2c_12(void) 2145 { 2146 /* device should enable */ 2147 if (of_unittest_apply_overlay_check(12, 12, 0, 1, I2C_OVERLAY)) 2148 return; 2149 2150 unittest(1, "overlay test %d passed\n", 12); 2151 } 2152 2153 /* test deactivation of device */ 2154 static void __init of_unittest_overlay_i2c_13(void) 2155 { 2156 /* device should disable */ 2157 if (of_unittest_apply_overlay_check(13, 13, 1, 0, I2C_OVERLAY)) 2158 return; 2159 2160 unittest(1, "overlay test %d passed\n", 13); 2161 } 2162 2163 /* just check for i2c mux existence */ 2164 static void of_unittest_overlay_i2c_14(void) 2165 { 2166 } 2167 2168 static void __init of_unittest_overlay_i2c_15(void) 2169 { 2170 /* device should enable */ 2171 if (of_unittest_apply_overlay_check(15, 15, 0, 1, I2C_OVERLAY)) 2172 return; 2173 2174 unittest(1, "overlay test %d passed\n", 15); 2175 } 2176 2177 #else 2178 2179 static inline void of_unittest_overlay_i2c_14(void) { } 2180 static inline void of_unittest_overlay_i2c_15(void) { } 2181 2182 #endif 2183 2184 static void __init of_unittest_overlay(void) 2185 { 2186 struct device_node *bus_np = NULL; 2187 2188 if (platform_driver_register(&unittest_driver)) { 2189 unittest(0, "could not register unittest driver\n"); 2190 goto out; 2191 } 2192 2193 bus_np = of_find_node_by_path(bus_path); 2194 if (bus_np == NULL) { 2195 unittest(0, "could not find bus_path \"%s\"\n", bus_path); 2196 goto out; 2197 } 2198 2199 if (of_platform_default_populate(bus_np, NULL, NULL)) { 2200 unittest(0, "could not populate bus @ \"%s\"\n", bus_path); 2201 goto out; 2202 } 2203 2204 if (!of_unittest_device_exists(100, PDEV_OVERLAY)) { 2205 unittest(0, "could not find unittest0 @ \"%s\"\n", 2206 unittest_path(100, PDEV_OVERLAY)); 2207 goto out; 2208 } 2209 2210 if (of_unittest_device_exists(101, PDEV_OVERLAY)) { 2211 unittest(0, "unittest1 @ \"%s\" should not exist\n", 2212 unittest_path(101, PDEV_OVERLAY)); 2213 goto out; 2214 } 2215 2216 unittest(1, "basic infrastructure of overlays passed"); 2217 2218 /* tests in sequence */ 2219 of_unittest_overlay_0(); 2220 of_unittest_overlay_1(); 2221 of_unittest_overlay_2(); 2222 of_unittest_overlay_3(); 2223 of_unittest_overlay_4(); 2224 of_unittest_overlay_5(); 2225 of_unittest_overlay_6(); 2226 of_unittest_overlay_8(); 2227 2228 of_unittest_overlay_10(); 2229 of_unittest_overlay_11(); 2230 2231 #if IS_BUILTIN(CONFIG_I2C) 2232 if (unittest(of_unittest_overlay_i2c_init() == 0, "i2c init failed\n")) 2233 goto out; 2234 2235 of_unittest_overlay_i2c_12(); 2236 of_unittest_overlay_i2c_13(); 2237 of_unittest_overlay_i2c_14(); 2238 of_unittest_overlay_i2c_15(); 2239 2240 of_unittest_overlay_i2c_cleanup(); 2241 #endif 2242 2243 of_unittest_destroy_tracked_overlays(); 2244 2245 out: 2246 of_node_put(bus_np); 2247 } 2248 2249 #else 2250 static inline void __init of_unittest_overlay(void) { } 2251 #endif 2252 2253 #ifdef CONFIG_OF_OVERLAY 2254 2255 /* 2256 * __dtb_ot_begin[] and __dtb_ot_end[] are created by cmd_dt_S_dtb 2257 * in scripts/Makefile.lib 2258 */ 2259 2260 #define OVERLAY_INFO_EXTERN(name) \ 2261 extern uint8_t __dtb_##name##_begin[]; \ 2262 extern uint8_t __dtb_##name##_end[] 2263 2264 #define OVERLAY_INFO(overlay_name, expected) \ 2265 { .dtb_begin = __dtb_##overlay_name##_begin, \ 2266 .dtb_end = __dtb_##overlay_name##_end, \ 2267 .expected_result = expected, \ 2268 .name = #overlay_name, \ 2269 } 2270 2271 struct overlay_info { 2272 uint8_t *dtb_begin; 2273 uint8_t *dtb_end; 2274 int expected_result; 2275 int overlay_id; 2276 char *name; 2277 }; 2278 2279 OVERLAY_INFO_EXTERN(overlay_base); 2280 OVERLAY_INFO_EXTERN(overlay); 2281 OVERLAY_INFO_EXTERN(overlay_0); 2282 OVERLAY_INFO_EXTERN(overlay_1); 2283 OVERLAY_INFO_EXTERN(overlay_2); 2284 OVERLAY_INFO_EXTERN(overlay_3); 2285 OVERLAY_INFO_EXTERN(overlay_4); 2286 OVERLAY_INFO_EXTERN(overlay_5); 2287 OVERLAY_INFO_EXTERN(overlay_6); 2288 OVERLAY_INFO_EXTERN(overlay_7); 2289 OVERLAY_INFO_EXTERN(overlay_8); 2290 OVERLAY_INFO_EXTERN(overlay_9); 2291 OVERLAY_INFO_EXTERN(overlay_10); 2292 OVERLAY_INFO_EXTERN(overlay_11); 2293 OVERLAY_INFO_EXTERN(overlay_12); 2294 OVERLAY_INFO_EXTERN(overlay_13); 2295 OVERLAY_INFO_EXTERN(overlay_15); 2296 OVERLAY_INFO_EXTERN(overlay_bad_add_dup_node); 2297 OVERLAY_INFO_EXTERN(overlay_bad_add_dup_prop); 2298 OVERLAY_INFO_EXTERN(overlay_bad_phandle); 2299 OVERLAY_INFO_EXTERN(overlay_bad_symbol); 2300 2301 /* entries found by name */ 2302 static struct overlay_info overlays[] = { 2303 OVERLAY_INFO(overlay_base, -9999), 2304 OVERLAY_INFO(overlay, 0), 2305 OVERLAY_INFO(overlay_0, 0), 2306 OVERLAY_INFO(overlay_1, 0), 2307 OVERLAY_INFO(overlay_2, 0), 2308 OVERLAY_INFO(overlay_3, 0), 2309 OVERLAY_INFO(overlay_4, 0), 2310 OVERLAY_INFO(overlay_5, 0), 2311 OVERLAY_INFO(overlay_6, 0), 2312 OVERLAY_INFO(overlay_7, 0), 2313 OVERLAY_INFO(overlay_8, 0), 2314 OVERLAY_INFO(overlay_9, 0), 2315 OVERLAY_INFO(overlay_10, 0), 2316 OVERLAY_INFO(overlay_11, 0), 2317 OVERLAY_INFO(overlay_12, 0), 2318 OVERLAY_INFO(overlay_13, 0), 2319 OVERLAY_INFO(overlay_15, 0), 2320 OVERLAY_INFO(overlay_bad_add_dup_node, -EINVAL), 2321 OVERLAY_INFO(overlay_bad_add_dup_prop, -EINVAL), 2322 OVERLAY_INFO(overlay_bad_phandle, -EINVAL), 2323 OVERLAY_INFO(overlay_bad_symbol, -EINVAL), 2324 /* end marker */ 2325 {.dtb_begin = NULL, .dtb_end = NULL, .expected_result = 0, .name = NULL} 2326 }; 2327 2328 static struct device_node *overlay_base_root; 2329 2330 static void * __init dt_alloc_memory(u64 size, u64 align) 2331 { 2332 void *ptr = memblock_alloc(size, align); 2333 2334 if (!ptr) 2335 panic("%s: Failed to allocate %llu bytes align=0x%llx\n", 2336 __func__, size, align); 2337 2338 return ptr; 2339 } 2340 2341 /* 2342 * Create base device tree for the overlay unittest. 2343 * 2344 * This is called from very early boot code. 2345 * 2346 * Do as much as possible the same way as done in __unflatten_device_tree 2347 * and other early boot steps for the normal FDT so that the overlay base 2348 * unflattened tree will have the same characteristics as the real tree 2349 * (such as having memory allocated by the early allocator). The goal 2350 * is to test "the real thing" as much as possible, and test "test setup 2351 * code" as little as possible. 2352 * 2353 * Have to stop before resolving phandles, because that uses kmalloc. 2354 */ 2355 void __init unittest_unflatten_overlay_base(void) 2356 { 2357 struct overlay_info *info; 2358 u32 data_size; 2359 void *new_fdt; 2360 u32 size; 2361 int found = 0; 2362 const char *overlay_name = "overlay_base"; 2363 2364 for (info = overlays; info && info->name; info++) { 2365 if (!strcmp(overlay_name, info->name)) { 2366 found = 1; 2367 break; 2368 } 2369 } 2370 if (!found) { 2371 pr_err("no overlay data for %s\n", overlay_name); 2372 return; 2373 } 2374 2375 info = &overlays[0]; 2376 2377 if (info->expected_result != -9999) { 2378 pr_err("No dtb 'overlay_base' to attach\n"); 2379 return; 2380 } 2381 2382 data_size = info->dtb_end - info->dtb_begin; 2383 if (!data_size) { 2384 pr_err("No dtb 'overlay_base' to attach\n"); 2385 return; 2386 } 2387 2388 size = fdt_totalsize(info->dtb_begin); 2389 if (size != data_size) { 2390 pr_err("dtb 'overlay_base' header totalsize != actual size"); 2391 return; 2392 } 2393 2394 new_fdt = dt_alloc_memory(size, roundup_pow_of_two(FDT_V17_SIZE)); 2395 if (!new_fdt) { 2396 pr_err("alloc for dtb 'overlay_base' failed"); 2397 return; 2398 } 2399 2400 memcpy(new_fdt, info->dtb_begin, size); 2401 2402 __unflatten_device_tree(new_fdt, NULL, &overlay_base_root, 2403 dt_alloc_memory, true); 2404 } 2405 2406 /* 2407 * The purpose of of_unittest_overlay_data_add is to add an 2408 * overlay in the normal fashion. This is a test of the whole 2409 * picture, instead of testing individual elements. 2410 * 2411 * A secondary purpose is to be able to verify that the contents of 2412 * /proc/device-tree/ contains the updated structure and values from 2413 * the overlay. That must be verified separately in user space. 2414 * 2415 * Return 0 on unexpected error. 2416 */ 2417 static int __init overlay_data_apply(const char *overlay_name, int *overlay_id) 2418 { 2419 struct overlay_info *info; 2420 int found = 0; 2421 int ret; 2422 u32 size; 2423 2424 for (info = overlays; info && info->name; info++) { 2425 if (!strcmp(overlay_name, info->name)) { 2426 found = 1; 2427 break; 2428 } 2429 } 2430 if (!found) { 2431 pr_err("no overlay data for %s\n", overlay_name); 2432 return 0; 2433 } 2434 2435 size = info->dtb_end - info->dtb_begin; 2436 if (!size) 2437 pr_err("no overlay data for %s\n", overlay_name); 2438 2439 ret = of_overlay_fdt_apply(info->dtb_begin, size, &info->overlay_id); 2440 if (overlay_id) 2441 *overlay_id = info->overlay_id; 2442 if (ret < 0) 2443 goto out; 2444 2445 pr_debug("%s applied\n", overlay_name); 2446 2447 out: 2448 if (ret != info->expected_result) 2449 pr_err("of_overlay_fdt_apply() expected %d, ret=%d, %s\n", 2450 info->expected_result, ret, overlay_name); 2451 2452 return (ret == info->expected_result); 2453 } 2454 2455 /* 2456 * The purpose of of_unittest_overlay_high_level is to add an overlay 2457 * in the normal fashion. This is a test of the whole picture, 2458 * instead of individual elements. 2459 * 2460 * The first part of the function is _not_ normal overlay usage; it is 2461 * finishing splicing the base overlay device tree into the live tree. 2462 */ 2463 static __init void of_unittest_overlay_high_level(void) 2464 { 2465 struct device_node *last_sibling; 2466 struct device_node *np; 2467 struct device_node *of_symbols; 2468 struct device_node *overlay_base_symbols; 2469 struct device_node **pprev; 2470 struct property *prop; 2471 2472 if (!overlay_base_root) { 2473 unittest(0, "overlay_base_root not initialized\n"); 2474 return; 2475 } 2476 2477 /* 2478 * Could not fixup phandles in unittest_unflatten_overlay_base() 2479 * because kmalloc() was not yet available. 2480 */ 2481 of_overlay_mutex_lock(); 2482 of_resolve_phandles(overlay_base_root); 2483 of_overlay_mutex_unlock(); 2484 2485 2486 /* 2487 * do not allow overlay_base to duplicate any node already in 2488 * tree, this greatly simplifies the code 2489 */ 2490 2491 /* 2492 * remove overlay_base_root node "__local_fixups", after 2493 * being used by of_resolve_phandles() 2494 */ 2495 pprev = &overlay_base_root->child; 2496 for (np = overlay_base_root->child; np; np = np->sibling) { 2497 if (of_node_name_eq(np, "__local_fixups__")) { 2498 *pprev = np->sibling; 2499 break; 2500 } 2501 pprev = &np->sibling; 2502 } 2503 2504 /* remove overlay_base_root node "__symbols__" if in live tree */ 2505 of_symbols = of_get_child_by_name(of_root, "__symbols__"); 2506 if (of_symbols) { 2507 /* will have to graft properties from node into live tree */ 2508 pprev = &overlay_base_root->child; 2509 for (np = overlay_base_root->child; np; np = np->sibling) { 2510 if (of_node_name_eq(np, "__symbols__")) { 2511 overlay_base_symbols = np; 2512 *pprev = np->sibling; 2513 break; 2514 } 2515 pprev = &np->sibling; 2516 } 2517 } 2518 2519 for_each_child_of_node(overlay_base_root, np) { 2520 struct device_node *base_child; 2521 for_each_child_of_node(of_root, base_child) { 2522 if (!strcmp(np->full_name, base_child->full_name)) { 2523 unittest(0, "illegal node name in overlay_base %pOFn", 2524 np); 2525 return; 2526 } 2527 } 2528 } 2529 2530 /* 2531 * overlay 'overlay_base' is not allowed to have root 2532 * properties, so only need to splice nodes into main device tree. 2533 * 2534 * root node of *overlay_base_root will not be freed, it is lost 2535 * memory. 2536 */ 2537 2538 for (np = overlay_base_root->child; np; np = np->sibling) 2539 np->parent = of_root; 2540 2541 mutex_lock(&of_mutex); 2542 2543 for (last_sibling = np = of_root->child; np; np = np->sibling) 2544 last_sibling = np; 2545 2546 if (last_sibling) 2547 last_sibling->sibling = overlay_base_root->child; 2548 else 2549 of_root->child = overlay_base_root->child; 2550 2551 for_each_of_allnodes_from(overlay_base_root, np) 2552 __of_attach_node_sysfs(np); 2553 2554 if (of_symbols) { 2555 struct property *new_prop; 2556 for_each_property_of_node(overlay_base_symbols, prop) { 2557 2558 new_prop = __of_prop_dup(prop, GFP_KERNEL); 2559 if (!new_prop) { 2560 unittest(0, "__of_prop_dup() of '%s' from overlay_base node __symbols__", 2561 prop->name); 2562 goto err_unlock; 2563 } 2564 if (__of_add_property(of_symbols, new_prop)) { 2565 /* "name" auto-generated by unflatten */ 2566 if (!strcmp(new_prop->name, "name")) 2567 continue; 2568 unittest(0, "duplicate property '%s' in overlay_base node __symbols__", 2569 prop->name); 2570 goto err_unlock; 2571 } 2572 if (__of_add_property_sysfs(of_symbols, new_prop)) { 2573 unittest(0, "unable to add property '%s' in overlay_base node __symbols__ to sysfs", 2574 prop->name); 2575 goto err_unlock; 2576 } 2577 } 2578 } 2579 2580 mutex_unlock(&of_mutex); 2581 2582 2583 /* now do the normal overlay usage test */ 2584 2585 unittest(overlay_data_apply("overlay", NULL), 2586 "Adding overlay 'overlay' failed\n"); 2587 2588 unittest(overlay_data_apply("overlay_bad_add_dup_node", NULL), 2589 "Adding overlay 'overlay_bad_add_dup_node' failed\n"); 2590 2591 unittest(overlay_data_apply("overlay_bad_add_dup_prop", NULL), 2592 "Adding overlay 'overlay_bad_add_dup_prop' failed\n"); 2593 2594 unittest(overlay_data_apply("overlay_bad_phandle", NULL), 2595 "Adding overlay 'overlay_bad_phandle' failed\n"); 2596 2597 unittest(overlay_data_apply("overlay_bad_symbol", NULL), 2598 "Adding overlay 'overlay_bad_symbol' failed\n"); 2599 2600 return; 2601 2602 err_unlock: 2603 mutex_unlock(&of_mutex); 2604 } 2605 2606 #else 2607 2608 static inline __init void of_unittest_overlay_high_level(void) {} 2609 2610 #endif 2611 2612 static int __init of_unittest(void) 2613 { 2614 struct device_node *np; 2615 int res; 2616 2617 /* adding data for unittest */ 2618 2619 if (IS_ENABLED(CONFIG_UML)) 2620 unittest_unflatten_overlay_base(); 2621 2622 res = unittest_data_add(); 2623 if (res) 2624 return res; 2625 if (!of_aliases) 2626 of_aliases = of_find_node_by_path("/aliases"); 2627 2628 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); 2629 if (!np) { 2630 pr_info("No testcase data in device tree; not running tests\n"); 2631 return 0; 2632 } 2633 of_node_put(np); 2634 2635 pr_info("start of unittest - you will see error messages\n"); 2636 of_unittest_check_tree_linkage(); 2637 of_unittest_check_phandles(); 2638 of_unittest_find_node_by_name(); 2639 of_unittest_dynamic(); 2640 of_unittest_parse_phandle_with_args(); 2641 of_unittest_parse_phandle_with_args_map(); 2642 of_unittest_printf(); 2643 of_unittest_property_string(); 2644 of_unittest_property_copy(); 2645 of_unittest_changeset(); 2646 of_unittest_parse_interrupts(); 2647 of_unittest_parse_interrupts_extended(); 2648 of_unittest_parse_dma_ranges(); 2649 of_unittest_pci_dma_ranges(); 2650 of_unittest_match_node(); 2651 of_unittest_platform_populate(); 2652 of_unittest_overlay(); 2653 2654 /* Double check linkage after removing testcase data */ 2655 of_unittest_check_tree_linkage(); 2656 2657 of_unittest_overlay_high_level(); 2658 2659 pr_info("end of unittest - %i passed, %i failed\n", 2660 unittest_results.passed, unittest_results.failed); 2661 2662 return 0; 2663 } 2664 late_initcall(of_unittest); 2665