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 return -ENODATA; 1301 } 1302 1303 /* 1304 * This lock normally encloses of_resolve_phandles() 1305 */ 1306 of_overlay_mutex_lock(); 1307 1308 rc = of_resolve_phandles(unittest_data_node); 1309 if (rc) { 1310 pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__, rc); 1311 of_overlay_mutex_unlock(); 1312 return -EINVAL; 1313 } 1314 1315 if (!of_root) { 1316 of_root = unittest_data_node; 1317 for_each_of_allnodes(np) 1318 __of_attach_node_sysfs(np); 1319 of_aliases = of_find_node_by_path("/aliases"); 1320 of_chosen = of_find_node_by_path("/chosen"); 1321 of_overlay_mutex_unlock(); 1322 return 0; 1323 } 1324 1325 /* attach the sub-tree to live tree */ 1326 np = unittest_data_node->child; 1327 while (np) { 1328 struct device_node *next = np->sibling; 1329 1330 np->parent = of_root; 1331 attach_node_and_children(np); 1332 np = next; 1333 } 1334 1335 of_overlay_mutex_unlock(); 1336 1337 return 0; 1338 } 1339 1340 #ifdef CONFIG_OF_OVERLAY 1341 static int __init overlay_data_apply(const char *overlay_name, int *overlay_id); 1342 1343 static int unittest_probe(struct platform_device *pdev) 1344 { 1345 struct device *dev = &pdev->dev; 1346 struct device_node *np = dev->of_node; 1347 1348 if (np == NULL) { 1349 dev_err(dev, "No OF data for device\n"); 1350 return -EINVAL; 1351 1352 } 1353 1354 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 1355 1356 of_platform_populate(np, NULL, NULL, &pdev->dev); 1357 1358 return 0; 1359 } 1360 1361 static int unittest_remove(struct platform_device *pdev) 1362 { 1363 struct device *dev = &pdev->dev; 1364 struct device_node *np = dev->of_node; 1365 1366 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 1367 return 0; 1368 } 1369 1370 static const struct of_device_id unittest_match[] = { 1371 { .compatible = "unittest", }, 1372 {}, 1373 }; 1374 1375 static struct platform_driver unittest_driver = { 1376 .probe = unittest_probe, 1377 .remove = unittest_remove, 1378 .driver = { 1379 .name = "unittest", 1380 .of_match_table = of_match_ptr(unittest_match), 1381 }, 1382 }; 1383 1384 /* get the platform device instantiated at the path */ 1385 static struct platform_device *of_path_to_platform_device(const char *path) 1386 { 1387 struct device_node *np; 1388 struct platform_device *pdev; 1389 1390 np = of_find_node_by_path(path); 1391 if (np == NULL) 1392 return NULL; 1393 1394 pdev = of_find_device_by_node(np); 1395 of_node_put(np); 1396 1397 return pdev; 1398 } 1399 1400 /* find out if a platform device exists at that path */ 1401 static int of_path_platform_device_exists(const char *path) 1402 { 1403 struct platform_device *pdev; 1404 1405 pdev = of_path_to_platform_device(path); 1406 platform_device_put(pdev); 1407 return pdev != NULL; 1408 } 1409 1410 #if IS_BUILTIN(CONFIG_I2C) 1411 1412 /* get the i2c client device instantiated at the path */ 1413 static struct i2c_client *of_path_to_i2c_client(const char *path) 1414 { 1415 struct device_node *np; 1416 struct i2c_client *client; 1417 1418 np = of_find_node_by_path(path); 1419 if (np == NULL) 1420 return NULL; 1421 1422 client = of_find_i2c_device_by_node(np); 1423 of_node_put(np); 1424 1425 return client; 1426 } 1427 1428 /* find out if a i2c client device exists at that path */ 1429 static int of_path_i2c_client_exists(const char *path) 1430 { 1431 struct i2c_client *client; 1432 1433 client = of_path_to_i2c_client(path); 1434 if (client) 1435 put_device(&client->dev); 1436 return client != NULL; 1437 } 1438 #else 1439 static int of_path_i2c_client_exists(const char *path) 1440 { 1441 return 0; 1442 } 1443 #endif 1444 1445 enum overlay_type { 1446 PDEV_OVERLAY, 1447 I2C_OVERLAY 1448 }; 1449 1450 static int of_path_device_type_exists(const char *path, 1451 enum overlay_type ovtype) 1452 { 1453 switch (ovtype) { 1454 case PDEV_OVERLAY: 1455 return of_path_platform_device_exists(path); 1456 case I2C_OVERLAY: 1457 return of_path_i2c_client_exists(path); 1458 } 1459 return 0; 1460 } 1461 1462 static const char *unittest_path(int nr, enum overlay_type ovtype) 1463 { 1464 const char *base; 1465 static char buf[256]; 1466 1467 switch (ovtype) { 1468 case PDEV_OVERLAY: 1469 base = "/testcase-data/overlay-node/test-bus"; 1470 break; 1471 case I2C_OVERLAY: 1472 base = "/testcase-data/overlay-node/test-bus/i2c-test-bus"; 1473 break; 1474 default: 1475 buf[0] = '\0'; 1476 return buf; 1477 } 1478 snprintf(buf, sizeof(buf) - 1, "%s/test-unittest%d", base, nr); 1479 buf[sizeof(buf) - 1] = '\0'; 1480 return buf; 1481 } 1482 1483 static int of_unittest_device_exists(int unittest_nr, enum overlay_type ovtype) 1484 { 1485 const char *path; 1486 1487 path = unittest_path(unittest_nr, ovtype); 1488 1489 switch (ovtype) { 1490 case PDEV_OVERLAY: 1491 return of_path_platform_device_exists(path); 1492 case I2C_OVERLAY: 1493 return of_path_i2c_client_exists(path); 1494 } 1495 return 0; 1496 } 1497 1498 static const char *overlay_name_from_nr(int nr) 1499 { 1500 static char buf[256]; 1501 1502 snprintf(buf, sizeof(buf) - 1, 1503 "overlay_%d", nr); 1504 buf[sizeof(buf) - 1] = '\0'; 1505 1506 return buf; 1507 } 1508 1509 static const char *bus_path = "/testcase-data/overlay-node/test-bus"; 1510 1511 /* it is guaranteed that overlay ids are assigned in sequence */ 1512 #define MAX_UNITTEST_OVERLAYS 256 1513 static unsigned long overlay_id_bits[BITS_TO_LONGS(MAX_UNITTEST_OVERLAYS)]; 1514 static int overlay_first_id = -1; 1515 1516 static void of_unittest_track_overlay(int id) 1517 { 1518 if (overlay_first_id < 0) 1519 overlay_first_id = id; 1520 id -= overlay_first_id; 1521 1522 /* we shouldn't need that many */ 1523 BUG_ON(id >= MAX_UNITTEST_OVERLAYS); 1524 overlay_id_bits[BIT_WORD(id)] |= BIT_MASK(id); 1525 } 1526 1527 static void of_unittest_untrack_overlay(int id) 1528 { 1529 if (overlay_first_id < 0) 1530 return; 1531 id -= overlay_first_id; 1532 BUG_ON(id >= MAX_UNITTEST_OVERLAYS); 1533 overlay_id_bits[BIT_WORD(id)] &= ~BIT_MASK(id); 1534 } 1535 1536 static void of_unittest_destroy_tracked_overlays(void) 1537 { 1538 int id, ret, defers, ovcs_id; 1539 1540 if (overlay_first_id < 0) 1541 return; 1542 1543 /* try until no defers */ 1544 do { 1545 defers = 0; 1546 /* remove in reverse order */ 1547 for (id = MAX_UNITTEST_OVERLAYS - 1; id >= 0; id--) { 1548 if (!(overlay_id_bits[BIT_WORD(id)] & BIT_MASK(id))) 1549 continue; 1550 1551 ovcs_id = id + overlay_first_id; 1552 ret = of_overlay_remove(&ovcs_id); 1553 if (ret == -ENODEV) { 1554 pr_warn("%s: no overlay to destroy for #%d\n", 1555 __func__, id + overlay_first_id); 1556 continue; 1557 } 1558 if (ret != 0) { 1559 defers++; 1560 pr_warn("%s: overlay destroy failed for #%d\n", 1561 __func__, id + overlay_first_id); 1562 continue; 1563 } 1564 1565 overlay_id_bits[BIT_WORD(id)] &= ~BIT_MASK(id); 1566 } 1567 } while (defers > 0); 1568 } 1569 1570 static int __init of_unittest_apply_overlay(int overlay_nr, int *overlay_id) 1571 { 1572 const char *overlay_name; 1573 1574 overlay_name = overlay_name_from_nr(overlay_nr); 1575 1576 if (!overlay_data_apply(overlay_name, overlay_id)) { 1577 unittest(0, "could not apply overlay \"%s\"\n", 1578 overlay_name); 1579 return -EFAULT; 1580 } 1581 of_unittest_track_overlay(*overlay_id); 1582 1583 return 0; 1584 } 1585 1586 /* apply an overlay while checking before and after states */ 1587 static int __init of_unittest_apply_overlay_check(int overlay_nr, 1588 int unittest_nr, int before, int after, 1589 enum overlay_type ovtype) 1590 { 1591 int ret, ovcs_id; 1592 1593 /* unittest device must not be in before state */ 1594 if (of_unittest_device_exists(unittest_nr, ovtype) != before) { 1595 unittest(0, "%s with device @\"%s\" %s\n", 1596 overlay_name_from_nr(overlay_nr), 1597 unittest_path(unittest_nr, ovtype), 1598 !before ? "enabled" : "disabled"); 1599 return -EINVAL; 1600 } 1601 1602 ovcs_id = 0; 1603 ret = of_unittest_apply_overlay(overlay_nr, &ovcs_id); 1604 if (ret != 0) { 1605 /* of_unittest_apply_overlay already called unittest() */ 1606 return ret; 1607 } 1608 1609 /* unittest device must be to set to after state */ 1610 if (of_unittest_device_exists(unittest_nr, ovtype) != after) { 1611 unittest(0, "%s failed to create @\"%s\" %s\n", 1612 overlay_name_from_nr(overlay_nr), 1613 unittest_path(unittest_nr, ovtype), 1614 !after ? "enabled" : "disabled"); 1615 return -EINVAL; 1616 } 1617 1618 return 0; 1619 } 1620 1621 /* apply an overlay and then revert it while checking before, after states */ 1622 static int __init of_unittest_apply_revert_overlay_check(int overlay_nr, 1623 int unittest_nr, int before, int after, 1624 enum overlay_type ovtype) 1625 { 1626 int ret, ovcs_id; 1627 1628 /* unittest device must be in before state */ 1629 if (of_unittest_device_exists(unittest_nr, ovtype) != before) { 1630 unittest(0, "%s with device @\"%s\" %s\n", 1631 overlay_name_from_nr(overlay_nr), 1632 unittest_path(unittest_nr, ovtype), 1633 !before ? "enabled" : "disabled"); 1634 return -EINVAL; 1635 } 1636 1637 /* apply the overlay */ 1638 ovcs_id = 0; 1639 ret = of_unittest_apply_overlay(overlay_nr, &ovcs_id); 1640 if (ret != 0) { 1641 /* of_unittest_apply_overlay already called unittest() */ 1642 return ret; 1643 } 1644 1645 /* unittest device must be in after state */ 1646 if (of_unittest_device_exists(unittest_nr, ovtype) != after) { 1647 unittest(0, "%s failed to create @\"%s\" %s\n", 1648 overlay_name_from_nr(overlay_nr), 1649 unittest_path(unittest_nr, ovtype), 1650 !after ? "enabled" : "disabled"); 1651 return -EINVAL; 1652 } 1653 1654 ret = of_overlay_remove(&ovcs_id); 1655 if (ret != 0) { 1656 unittest(0, "%s failed to be destroyed @\"%s\"\n", 1657 overlay_name_from_nr(overlay_nr), 1658 unittest_path(unittest_nr, ovtype)); 1659 return ret; 1660 } 1661 1662 /* unittest device must be again in before state */ 1663 if (of_unittest_device_exists(unittest_nr, PDEV_OVERLAY) != before) { 1664 unittest(0, "%s with device @\"%s\" %s\n", 1665 overlay_name_from_nr(overlay_nr), 1666 unittest_path(unittest_nr, ovtype), 1667 !before ? "enabled" : "disabled"); 1668 return -EINVAL; 1669 } 1670 1671 return 0; 1672 } 1673 1674 /* test activation of device */ 1675 static void __init of_unittest_overlay_0(void) 1676 { 1677 /* device should enable */ 1678 if (of_unittest_apply_overlay_check(0, 0, 0, 1, PDEV_OVERLAY)) 1679 return; 1680 1681 unittest(1, "overlay test %d passed\n", 0); 1682 } 1683 1684 /* test deactivation of device */ 1685 static void __init of_unittest_overlay_1(void) 1686 { 1687 /* device should disable */ 1688 if (of_unittest_apply_overlay_check(1, 1, 1, 0, PDEV_OVERLAY)) 1689 return; 1690 1691 unittest(1, "overlay test %d passed\n", 1); 1692 } 1693 1694 /* test activation of device */ 1695 static void __init of_unittest_overlay_2(void) 1696 { 1697 /* device should enable */ 1698 if (of_unittest_apply_overlay_check(2, 2, 0, 1, PDEV_OVERLAY)) 1699 return; 1700 1701 unittest(1, "overlay test %d passed\n", 2); 1702 } 1703 1704 /* test deactivation of device */ 1705 static void __init of_unittest_overlay_3(void) 1706 { 1707 /* device should disable */ 1708 if (of_unittest_apply_overlay_check(3, 3, 1, 0, PDEV_OVERLAY)) 1709 return; 1710 1711 unittest(1, "overlay test %d passed\n", 3); 1712 } 1713 1714 /* test activation of a full device node */ 1715 static void __init of_unittest_overlay_4(void) 1716 { 1717 /* device should disable */ 1718 if (of_unittest_apply_overlay_check(4, 4, 0, 1, PDEV_OVERLAY)) 1719 return; 1720 1721 unittest(1, "overlay test %d passed\n", 4); 1722 } 1723 1724 /* test overlay apply/revert sequence */ 1725 static void __init of_unittest_overlay_5(void) 1726 { 1727 /* device should disable */ 1728 if (of_unittest_apply_revert_overlay_check(5, 5, 0, 1, PDEV_OVERLAY)) 1729 return; 1730 1731 unittest(1, "overlay test %d passed\n", 5); 1732 } 1733 1734 /* test overlay application in sequence */ 1735 static void __init of_unittest_overlay_6(void) 1736 { 1737 int i, ov_id[2], ovcs_id; 1738 int overlay_nr = 6, unittest_nr = 6; 1739 int before = 0, after = 1; 1740 const char *overlay_name; 1741 1742 /* unittest device must be in before state */ 1743 for (i = 0; i < 2; i++) { 1744 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY) 1745 != before) { 1746 unittest(0, "%s with device @\"%s\" %s\n", 1747 overlay_name_from_nr(overlay_nr + i), 1748 unittest_path(unittest_nr + i, 1749 PDEV_OVERLAY), 1750 !before ? "enabled" : "disabled"); 1751 return; 1752 } 1753 } 1754 1755 /* apply the overlays */ 1756 for (i = 0; i < 2; i++) { 1757 1758 overlay_name = overlay_name_from_nr(overlay_nr + i); 1759 1760 if (!overlay_data_apply(overlay_name, &ovcs_id)) { 1761 unittest(0, "could not apply overlay \"%s\"\n", 1762 overlay_name); 1763 return; 1764 } 1765 ov_id[i] = ovcs_id; 1766 of_unittest_track_overlay(ov_id[i]); 1767 } 1768 1769 for (i = 0; i < 2; i++) { 1770 /* unittest device must be in after state */ 1771 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY) 1772 != after) { 1773 unittest(0, "overlay @\"%s\" failed @\"%s\" %s\n", 1774 overlay_name_from_nr(overlay_nr + i), 1775 unittest_path(unittest_nr + i, 1776 PDEV_OVERLAY), 1777 !after ? "enabled" : "disabled"); 1778 return; 1779 } 1780 } 1781 1782 for (i = 1; i >= 0; i--) { 1783 ovcs_id = ov_id[i]; 1784 if (of_overlay_remove(&ovcs_id)) { 1785 unittest(0, "%s failed destroy @\"%s\"\n", 1786 overlay_name_from_nr(overlay_nr + i), 1787 unittest_path(unittest_nr + i, 1788 PDEV_OVERLAY)); 1789 return; 1790 } 1791 of_unittest_untrack_overlay(ov_id[i]); 1792 } 1793 1794 for (i = 0; i < 2; i++) { 1795 /* unittest device must be again in before state */ 1796 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY) 1797 != before) { 1798 unittest(0, "%s with device @\"%s\" %s\n", 1799 overlay_name_from_nr(overlay_nr + i), 1800 unittest_path(unittest_nr + i, 1801 PDEV_OVERLAY), 1802 !before ? "enabled" : "disabled"); 1803 return; 1804 } 1805 } 1806 1807 unittest(1, "overlay test %d passed\n", 6); 1808 } 1809 1810 /* test overlay application in sequence */ 1811 static void __init of_unittest_overlay_8(void) 1812 { 1813 int i, ov_id[2], ovcs_id; 1814 int overlay_nr = 8, unittest_nr = 8; 1815 const char *overlay_name; 1816 1817 /* we don't care about device state in this test */ 1818 1819 /* apply the overlays */ 1820 for (i = 0; i < 2; i++) { 1821 1822 overlay_name = overlay_name_from_nr(overlay_nr + i); 1823 1824 if (!overlay_data_apply(overlay_name, &ovcs_id)) { 1825 unittest(0, "could not apply overlay \"%s\"\n", 1826 overlay_name); 1827 return; 1828 } 1829 ov_id[i] = ovcs_id; 1830 of_unittest_track_overlay(ov_id[i]); 1831 } 1832 1833 /* now try to remove first overlay (it should fail) */ 1834 ovcs_id = ov_id[0]; 1835 if (!of_overlay_remove(&ovcs_id)) { 1836 unittest(0, "%s was destroyed @\"%s\"\n", 1837 overlay_name_from_nr(overlay_nr + 0), 1838 unittest_path(unittest_nr, 1839 PDEV_OVERLAY)); 1840 return; 1841 } 1842 1843 /* removing them in order should work */ 1844 for (i = 1; i >= 0; i--) { 1845 ovcs_id = ov_id[i]; 1846 if (of_overlay_remove(&ovcs_id)) { 1847 unittest(0, "%s not destroyed @\"%s\"\n", 1848 overlay_name_from_nr(overlay_nr + i), 1849 unittest_path(unittest_nr, 1850 PDEV_OVERLAY)); 1851 return; 1852 } 1853 of_unittest_untrack_overlay(ov_id[i]); 1854 } 1855 1856 unittest(1, "overlay test %d passed\n", 8); 1857 } 1858 1859 /* test insertion of a bus with parent devices */ 1860 static void __init of_unittest_overlay_10(void) 1861 { 1862 int ret; 1863 char *child_path; 1864 1865 /* device should disable */ 1866 ret = of_unittest_apply_overlay_check(10, 10, 0, 1, PDEV_OVERLAY); 1867 if (unittest(ret == 0, 1868 "overlay test %d failed; overlay application\n", 10)) 1869 return; 1870 1871 child_path = kasprintf(GFP_KERNEL, "%s/test-unittest101", 1872 unittest_path(10, PDEV_OVERLAY)); 1873 if (unittest(child_path, "overlay test %d failed; kasprintf\n", 10)) 1874 return; 1875 1876 ret = of_path_device_type_exists(child_path, PDEV_OVERLAY); 1877 kfree(child_path); 1878 1879 unittest(ret, "overlay test %d failed; no child device\n", 10); 1880 } 1881 1882 /* test insertion of a bus with parent devices (and revert) */ 1883 static void __init of_unittest_overlay_11(void) 1884 { 1885 int ret; 1886 1887 /* device should disable */ 1888 ret = of_unittest_apply_revert_overlay_check(11, 11, 0, 1, 1889 PDEV_OVERLAY); 1890 unittest(ret == 0, "overlay test %d failed; overlay apply\n", 11); 1891 } 1892 1893 #if IS_BUILTIN(CONFIG_I2C) && IS_ENABLED(CONFIG_OF_OVERLAY) 1894 1895 struct unittest_i2c_bus_data { 1896 struct platform_device *pdev; 1897 struct i2c_adapter adap; 1898 }; 1899 1900 static int unittest_i2c_master_xfer(struct i2c_adapter *adap, 1901 struct i2c_msg *msgs, int num) 1902 { 1903 struct unittest_i2c_bus_data *std = i2c_get_adapdata(adap); 1904 1905 (void)std; 1906 1907 return num; 1908 } 1909 1910 static u32 unittest_i2c_functionality(struct i2c_adapter *adap) 1911 { 1912 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; 1913 } 1914 1915 static const struct i2c_algorithm unittest_i2c_algo = { 1916 .master_xfer = unittest_i2c_master_xfer, 1917 .functionality = unittest_i2c_functionality, 1918 }; 1919 1920 static int unittest_i2c_bus_probe(struct platform_device *pdev) 1921 { 1922 struct device *dev = &pdev->dev; 1923 struct device_node *np = dev->of_node; 1924 struct unittest_i2c_bus_data *std; 1925 struct i2c_adapter *adap; 1926 int ret; 1927 1928 if (np == NULL) { 1929 dev_err(dev, "No OF data for device\n"); 1930 return -EINVAL; 1931 1932 } 1933 1934 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 1935 1936 std = devm_kzalloc(dev, sizeof(*std), GFP_KERNEL); 1937 if (!std) 1938 return -ENOMEM; 1939 1940 /* link them together */ 1941 std->pdev = pdev; 1942 platform_set_drvdata(pdev, std); 1943 1944 adap = &std->adap; 1945 i2c_set_adapdata(adap, std); 1946 adap->nr = -1; 1947 strlcpy(adap->name, pdev->name, sizeof(adap->name)); 1948 adap->class = I2C_CLASS_DEPRECATED; 1949 adap->algo = &unittest_i2c_algo; 1950 adap->dev.parent = dev; 1951 adap->dev.of_node = dev->of_node; 1952 adap->timeout = 5 * HZ; 1953 adap->retries = 3; 1954 1955 ret = i2c_add_numbered_adapter(adap); 1956 if (ret != 0) { 1957 dev_err(dev, "Failed to add I2C adapter\n"); 1958 return ret; 1959 } 1960 1961 return 0; 1962 } 1963 1964 static int unittest_i2c_bus_remove(struct platform_device *pdev) 1965 { 1966 struct device *dev = &pdev->dev; 1967 struct device_node *np = dev->of_node; 1968 struct unittest_i2c_bus_data *std = platform_get_drvdata(pdev); 1969 1970 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 1971 i2c_del_adapter(&std->adap); 1972 1973 return 0; 1974 } 1975 1976 static const struct of_device_id unittest_i2c_bus_match[] = { 1977 { .compatible = "unittest-i2c-bus", }, 1978 {}, 1979 }; 1980 1981 static struct platform_driver unittest_i2c_bus_driver = { 1982 .probe = unittest_i2c_bus_probe, 1983 .remove = unittest_i2c_bus_remove, 1984 .driver = { 1985 .name = "unittest-i2c-bus", 1986 .of_match_table = of_match_ptr(unittest_i2c_bus_match), 1987 }, 1988 }; 1989 1990 static int unittest_i2c_dev_probe(struct i2c_client *client, 1991 const struct i2c_device_id *id) 1992 { 1993 struct device *dev = &client->dev; 1994 struct device_node *np = client->dev.of_node; 1995 1996 if (!np) { 1997 dev_err(dev, "No OF node\n"); 1998 return -EINVAL; 1999 } 2000 2001 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 2002 2003 return 0; 2004 }; 2005 2006 static int unittest_i2c_dev_remove(struct i2c_client *client) 2007 { 2008 struct device *dev = &client->dev; 2009 struct device_node *np = client->dev.of_node; 2010 2011 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 2012 return 0; 2013 } 2014 2015 static const struct i2c_device_id unittest_i2c_dev_id[] = { 2016 { .name = "unittest-i2c-dev" }, 2017 { } 2018 }; 2019 2020 static struct i2c_driver unittest_i2c_dev_driver = { 2021 .driver = { 2022 .name = "unittest-i2c-dev", 2023 }, 2024 .probe = unittest_i2c_dev_probe, 2025 .remove = unittest_i2c_dev_remove, 2026 .id_table = unittest_i2c_dev_id, 2027 }; 2028 2029 #if IS_BUILTIN(CONFIG_I2C_MUX) 2030 2031 static int unittest_i2c_mux_select_chan(struct i2c_mux_core *muxc, u32 chan) 2032 { 2033 return 0; 2034 } 2035 2036 static int unittest_i2c_mux_probe(struct i2c_client *client, 2037 const struct i2c_device_id *id) 2038 { 2039 int i, nchans; 2040 struct device *dev = &client->dev; 2041 struct i2c_adapter *adap = client->adapter; 2042 struct device_node *np = client->dev.of_node, *child; 2043 struct i2c_mux_core *muxc; 2044 u32 reg, max_reg; 2045 2046 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 2047 2048 if (!np) { 2049 dev_err(dev, "No OF node\n"); 2050 return -EINVAL; 2051 } 2052 2053 max_reg = (u32)-1; 2054 for_each_child_of_node(np, child) { 2055 if (of_property_read_u32(child, "reg", ®)) 2056 continue; 2057 if (max_reg == (u32)-1 || reg > max_reg) 2058 max_reg = reg; 2059 } 2060 nchans = max_reg == (u32)-1 ? 0 : max_reg + 1; 2061 if (nchans == 0) { 2062 dev_err(dev, "No channels\n"); 2063 return -EINVAL; 2064 } 2065 2066 muxc = i2c_mux_alloc(adap, dev, nchans, 0, 0, 2067 unittest_i2c_mux_select_chan, NULL); 2068 if (!muxc) 2069 return -ENOMEM; 2070 for (i = 0; i < nchans; i++) { 2071 if (i2c_mux_add_adapter(muxc, 0, i, 0)) { 2072 dev_err(dev, "Failed to register mux #%d\n", i); 2073 i2c_mux_del_adapters(muxc); 2074 return -ENODEV; 2075 } 2076 } 2077 2078 i2c_set_clientdata(client, muxc); 2079 2080 return 0; 2081 }; 2082 2083 static int unittest_i2c_mux_remove(struct i2c_client *client) 2084 { 2085 struct device *dev = &client->dev; 2086 struct device_node *np = client->dev.of_node; 2087 struct i2c_mux_core *muxc = i2c_get_clientdata(client); 2088 2089 dev_dbg(dev, "%s for node @%pOF\n", __func__, np); 2090 i2c_mux_del_adapters(muxc); 2091 return 0; 2092 } 2093 2094 static const struct i2c_device_id unittest_i2c_mux_id[] = { 2095 { .name = "unittest-i2c-mux" }, 2096 { } 2097 }; 2098 2099 static struct i2c_driver unittest_i2c_mux_driver = { 2100 .driver = { 2101 .name = "unittest-i2c-mux", 2102 }, 2103 .probe = unittest_i2c_mux_probe, 2104 .remove = unittest_i2c_mux_remove, 2105 .id_table = unittest_i2c_mux_id, 2106 }; 2107 2108 #endif 2109 2110 static int of_unittest_overlay_i2c_init(void) 2111 { 2112 int ret; 2113 2114 ret = i2c_add_driver(&unittest_i2c_dev_driver); 2115 if (unittest(ret == 0, 2116 "could not register unittest i2c device driver\n")) 2117 return ret; 2118 2119 ret = platform_driver_register(&unittest_i2c_bus_driver); 2120 if (unittest(ret == 0, 2121 "could not register unittest i2c bus driver\n")) 2122 return ret; 2123 2124 #if IS_BUILTIN(CONFIG_I2C_MUX) 2125 ret = i2c_add_driver(&unittest_i2c_mux_driver); 2126 if (unittest(ret == 0, 2127 "could not register unittest i2c mux driver\n")) 2128 return ret; 2129 #endif 2130 2131 return 0; 2132 } 2133 2134 static void of_unittest_overlay_i2c_cleanup(void) 2135 { 2136 #if IS_BUILTIN(CONFIG_I2C_MUX) 2137 i2c_del_driver(&unittest_i2c_mux_driver); 2138 #endif 2139 platform_driver_unregister(&unittest_i2c_bus_driver); 2140 i2c_del_driver(&unittest_i2c_dev_driver); 2141 } 2142 2143 static void __init of_unittest_overlay_i2c_12(void) 2144 { 2145 /* device should enable */ 2146 if (of_unittest_apply_overlay_check(12, 12, 0, 1, I2C_OVERLAY)) 2147 return; 2148 2149 unittest(1, "overlay test %d passed\n", 12); 2150 } 2151 2152 /* test deactivation of device */ 2153 static void __init of_unittest_overlay_i2c_13(void) 2154 { 2155 /* device should disable */ 2156 if (of_unittest_apply_overlay_check(13, 13, 1, 0, I2C_OVERLAY)) 2157 return; 2158 2159 unittest(1, "overlay test %d passed\n", 13); 2160 } 2161 2162 /* just check for i2c mux existence */ 2163 static void of_unittest_overlay_i2c_14(void) 2164 { 2165 } 2166 2167 static void __init of_unittest_overlay_i2c_15(void) 2168 { 2169 /* device should enable */ 2170 if (of_unittest_apply_overlay_check(15, 15, 0, 1, I2C_OVERLAY)) 2171 return; 2172 2173 unittest(1, "overlay test %d passed\n", 15); 2174 } 2175 2176 #else 2177 2178 static inline void of_unittest_overlay_i2c_14(void) { } 2179 static inline void of_unittest_overlay_i2c_15(void) { } 2180 2181 #endif 2182 2183 static void __init of_unittest_overlay(void) 2184 { 2185 struct device_node *bus_np = NULL; 2186 2187 if (platform_driver_register(&unittest_driver)) { 2188 unittest(0, "could not register unittest driver\n"); 2189 goto out; 2190 } 2191 2192 bus_np = of_find_node_by_path(bus_path); 2193 if (bus_np == NULL) { 2194 unittest(0, "could not find bus_path \"%s\"\n", bus_path); 2195 goto out; 2196 } 2197 2198 if (of_platform_default_populate(bus_np, NULL, NULL)) { 2199 unittest(0, "could not populate bus @ \"%s\"\n", bus_path); 2200 goto out; 2201 } 2202 2203 if (!of_unittest_device_exists(100, PDEV_OVERLAY)) { 2204 unittest(0, "could not find unittest0 @ \"%s\"\n", 2205 unittest_path(100, PDEV_OVERLAY)); 2206 goto out; 2207 } 2208 2209 if (of_unittest_device_exists(101, PDEV_OVERLAY)) { 2210 unittest(0, "unittest1 @ \"%s\" should not exist\n", 2211 unittest_path(101, PDEV_OVERLAY)); 2212 goto out; 2213 } 2214 2215 unittest(1, "basic infrastructure of overlays passed"); 2216 2217 /* tests in sequence */ 2218 of_unittest_overlay_0(); 2219 of_unittest_overlay_1(); 2220 of_unittest_overlay_2(); 2221 of_unittest_overlay_3(); 2222 of_unittest_overlay_4(); 2223 of_unittest_overlay_5(); 2224 of_unittest_overlay_6(); 2225 of_unittest_overlay_8(); 2226 2227 of_unittest_overlay_10(); 2228 of_unittest_overlay_11(); 2229 2230 #if IS_BUILTIN(CONFIG_I2C) 2231 if (unittest(of_unittest_overlay_i2c_init() == 0, "i2c init failed\n")) 2232 goto out; 2233 2234 of_unittest_overlay_i2c_12(); 2235 of_unittest_overlay_i2c_13(); 2236 of_unittest_overlay_i2c_14(); 2237 of_unittest_overlay_i2c_15(); 2238 2239 of_unittest_overlay_i2c_cleanup(); 2240 #endif 2241 2242 of_unittest_destroy_tracked_overlays(); 2243 2244 out: 2245 of_node_put(bus_np); 2246 } 2247 2248 #else 2249 static inline void __init of_unittest_overlay(void) { } 2250 #endif 2251 2252 #ifdef CONFIG_OF_OVERLAY 2253 2254 /* 2255 * __dtb_ot_begin[] and __dtb_ot_end[] are created by cmd_dt_S_dtb 2256 * in scripts/Makefile.lib 2257 */ 2258 2259 #define OVERLAY_INFO_EXTERN(name) \ 2260 extern uint8_t __dtb_##name##_begin[]; \ 2261 extern uint8_t __dtb_##name##_end[] 2262 2263 #define OVERLAY_INFO(overlay_name, expected) \ 2264 { .dtb_begin = __dtb_##overlay_name##_begin, \ 2265 .dtb_end = __dtb_##overlay_name##_end, \ 2266 .expected_result = expected, \ 2267 .name = #overlay_name, \ 2268 } 2269 2270 struct overlay_info { 2271 uint8_t *dtb_begin; 2272 uint8_t *dtb_end; 2273 int expected_result; 2274 int overlay_id; 2275 char *name; 2276 }; 2277 2278 OVERLAY_INFO_EXTERN(overlay_base); 2279 OVERLAY_INFO_EXTERN(overlay); 2280 OVERLAY_INFO_EXTERN(overlay_0); 2281 OVERLAY_INFO_EXTERN(overlay_1); 2282 OVERLAY_INFO_EXTERN(overlay_2); 2283 OVERLAY_INFO_EXTERN(overlay_3); 2284 OVERLAY_INFO_EXTERN(overlay_4); 2285 OVERLAY_INFO_EXTERN(overlay_5); 2286 OVERLAY_INFO_EXTERN(overlay_6); 2287 OVERLAY_INFO_EXTERN(overlay_7); 2288 OVERLAY_INFO_EXTERN(overlay_8); 2289 OVERLAY_INFO_EXTERN(overlay_9); 2290 OVERLAY_INFO_EXTERN(overlay_10); 2291 OVERLAY_INFO_EXTERN(overlay_11); 2292 OVERLAY_INFO_EXTERN(overlay_12); 2293 OVERLAY_INFO_EXTERN(overlay_13); 2294 OVERLAY_INFO_EXTERN(overlay_15); 2295 OVERLAY_INFO_EXTERN(overlay_bad_add_dup_node); 2296 OVERLAY_INFO_EXTERN(overlay_bad_add_dup_prop); 2297 OVERLAY_INFO_EXTERN(overlay_bad_phandle); 2298 OVERLAY_INFO_EXTERN(overlay_bad_symbol); 2299 2300 /* entries found by name */ 2301 static struct overlay_info overlays[] = { 2302 OVERLAY_INFO(overlay_base, -9999), 2303 OVERLAY_INFO(overlay, 0), 2304 OVERLAY_INFO(overlay_0, 0), 2305 OVERLAY_INFO(overlay_1, 0), 2306 OVERLAY_INFO(overlay_2, 0), 2307 OVERLAY_INFO(overlay_3, 0), 2308 OVERLAY_INFO(overlay_4, 0), 2309 OVERLAY_INFO(overlay_5, 0), 2310 OVERLAY_INFO(overlay_6, 0), 2311 OVERLAY_INFO(overlay_7, 0), 2312 OVERLAY_INFO(overlay_8, 0), 2313 OVERLAY_INFO(overlay_9, 0), 2314 OVERLAY_INFO(overlay_10, 0), 2315 OVERLAY_INFO(overlay_11, 0), 2316 OVERLAY_INFO(overlay_12, 0), 2317 OVERLAY_INFO(overlay_13, 0), 2318 OVERLAY_INFO(overlay_15, 0), 2319 OVERLAY_INFO(overlay_bad_add_dup_node, -EINVAL), 2320 OVERLAY_INFO(overlay_bad_add_dup_prop, -EINVAL), 2321 OVERLAY_INFO(overlay_bad_phandle, -EINVAL), 2322 OVERLAY_INFO(overlay_bad_symbol, -EINVAL), 2323 /* end marker */ 2324 {.dtb_begin = NULL, .dtb_end = NULL, .expected_result = 0, .name = NULL} 2325 }; 2326 2327 static struct device_node *overlay_base_root; 2328 2329 static void * __init dt_alloc_memory(u64 size, u64 align) 2330 { 2331 void *ptr = memblock_alloc(size, align); 2332 2333 if (!ptr) 2334 panic("%s: Failed to allocate %llu bytes align=0x%llx\n", 2335 __func__, size, align); 2336 2337 return ptr; 2338 } 2339 2340 /* 2341 * Create base device tree for the overlay unittest. 2342 * 2343 * This is called from very early boot code. 2344 * 2345 * Do as much as possible the same way as done in __unflatten_device_tree 2346 * and other early boot steps for the normal FDT so that the overlay base 2347 * unflattened tree will have the same characteristics as the real tree 2348 * (such as having memory allocated by the early allocator). The goal 2349 * is to test "the real thing" as much as possible, and test "test setup 2350 * code" as little as possible. 2351 * 2352 * Have to stop before resolving phandles, because that uses kmalloc. 2353 */ 2354 void __init unittest_unflatten_overlay_base(void) 2355 { 2356 struct overlay_info *info; 2357 u32 data_size; 2358 void *new_fdt; 2359 u32 size; 2360 int found = 0; 2361 const char *overlay_name = "overlay_base"; 2362 2363 for (info = overlays; info && info->name; info++) { 2364 if (!strcmp(overlay_name, info->name)) { 2365 found = 1; 2366 break; 2367 } 2368 } 2369 if (!found) { 2370 pr_err("no overlay data for %s\n", overlay_name); 2371 return; 2372 } 2373 2374 info = &overlays[0]; 2375 2376 if (info->expected_result != -9999) { 2377 pr_err("No dtb 'overlay_base' to attach\n"); 2378 return; 2379 } 2380 2381 data_size = info->dtb_end - info->dtb_begin; 2382 if (!data_size) { 2383 pr_err("No dtb 'overlay_base' to attach\n"); 2384 return; 2385 } 2386 2387 size = fdt_totalsize(info->dtb_begin); 2388 if (size != data_size) { 2389 pr_err("dtb 'overlay_base' header totalsize != actual size"); 2390 return; 2391 } 2392 2393 new_fdt = dt_alloc_memory(size, roundup_pow_of_two(FDT_V17_SIZE)); 2394 if (!new_fdt) { 2395 pr_err("alloc for dtb 'overlay_base' failed"); 2396 return; 2397 } 2398 2399 memcpy(new_fdt, info->dtb_begin, size); 2400 2401 __unflatten_device_tree(new_fdt, NULL, &overlay_base_root, 2402 dt_alloc_memory, true); 2403 } 2404 2405 /* 2406 * The purpose of of_unittest_overlay_data_add is to add an 2407 * overlay in the normal fashion. This is a test of the whole 2408 * picture, instead of testing individual elements. 2409 * 2410 * A secondary purpose is to be able to verify that the contents of 2411 * /proc/device-tree/ contains the updated structure and values from 2412 * the overlay. That must be verified separately in user space. 2413 * 2414 * Return 0 on unexpected error. 2415 */ 2416 static int __init overlay_data_apply(const char *overlay_name, int *overlay_id) 2417 { 2418 struct overlay_info *info; 2419 int found = 0; 2420 int ret; 2421 u32 size; 2422 2423 for (info = overlays; info && info->name; info++) { 2424 if (!strcmp(overlay_name, info->name)) { 2425 found = 1; 2426 break; 2427 } 2428 } 2429 if (!found) { 2430 pr_err("no overlay data for %s\n", overlay_name); 2431 return 0; 2432 } 2433 2434 size = info->dtb_end - info->dtb_begin; 2435 if (!size) 2436 pr_err("no overlay data for %s\n", overlay_name); 2437 2438 ret = of_overlay_fdt_apply(info->dtb_begin, size, &info->overlay_id); 2439 if (overlay_id) 2440 *overlay_id = info->overlay_id; 2441 if (ret < 0) 2442 goto out; 2443 2444 pr_debug("%s applied\n", overlay_name); 2445 2446 out: 2447 if (ret != info->expected_result) 2448 pr_err("of_overlay_fdt_apply() expected %d, ret=%d, %s\n", 2449 info->expected_result, ret, overlay_name); 2450 2451 return (ret == info->expected_result); 2452 } 2453 2454 /* 2455 * The purpose of of_unittest_overlay_high_level is to add an overlay 2456 * in the normal fashion. This is a test of the whole picture, 2457 * instead of individual elements. 2458 * 2459 * The first part of the function is _not_ normal overlay usage; it is 2460 * finishing splicing the base overlay device tree into the live tree. 2461 */ 2462 static __init void of_unittest_overlay_high_level(void) 2463 { 2464 struct device_node *last_sibling; 2465 struct device_node *np; 2466 struct device_node *of_symbols; 2467 struct device_node *overlay_base_symbols; 2468 struct device_node **pprev; 2469 struct property *prop; 2470 2471 if (!overlay_base_root) { 2472 unittest(0, "overlay_base_root not initialized\n"); 2473 return; 2474 } 2475 2476 /* 2477 * Could not fixup phandles in unittest_unflatten_overlay_base() 2478 * because kmalloc() was not yet available. 2479 */ 2480 of_overlay_mutex_lock(); 2481 of_resolve_phandles(overlay_base_root); 2482 of_overlay_mutex_unlock(); 2483 2484 2485 /* 2486 * do not allow overlay_base to duplicate any node already in 2487 * tree, this greatly simplifies the code 2488 */ 2489 2490 /* 2491 * remove overlay_base_root node "__local_fixups", after 2492 * being used by of_resolve_phandles() 2493 */ 2494 pprev = &overlay_base_root->child; 2495 for (np = overlay_base_root->child; np; np = np->sibling) { 2496 if (of_node_name_eq(np, "__local_fixups__")) { 2497 *pprev = np->sibling; 2498 break; 2499 } 2500 pprev = &np->sibling; 2501 } 2502 2503 /* remove overlay_base_root node "__symbols__" if in live tree */ 2504 of_symbols = of_get_child_by_name(of_root, "__symbols__"); 2505 if (of_symbols) { 2506 /* will have to graft properties from node into live tree */ 2507 pprev = &overlay_base_root->child; 2508 for (np = overlay_base_root->child; np; np = np->sibling) { 2509 if (of_node_name_eq(np, "__symbols__")) { 2510 overlay_base_symbols = np; 2511 *pprev = np->sibling; 2512 break; 2513 } 2514 pprev = &np->sibling; 2515 } 2516 } 2517 2518 for_each_child_of_node(overlay_base_root, np) { 2519 struct device_node *base_child; 2520 for_each_child_of_node(of_root, base_child) { 2521 if (!strcmp(np->full_name, base_child->full_name)) { 2522 unittest(0, "illegal node name in overlay_base %pOFn", 2523 np); 2524 return; 2525 } 2526 } 2527 } 2528 2529 /* 2530 * overlay 'overlay_base' is not allowed to have root 2531 * properties, so only need to splice nodes into main device tree. 2532 * 2533 * root node of *overlay_base_root will not be freed, it is lost 2534 * memory. 2535 */ 2536 2537 for (np = overlay_base_root->child; np; np = np->sibling) 2538 np->parent = of_root; 2539 2540 mutex_lock(&of_mutex); 2541 2542 for (last_sibling = np = of_root->child; np; np = np->sibling) 2543 last_sibling = np; 2544 2545 if (last_sibling) 2546 last_sibling->sibling = overlay_base_root->child; 2547 else 2548 of_root->child = overlay_base_root->child; 2549 2550 for_each_of_allnodes_from(overlay_base_root, np) 2551 __of_attach_node_sysfs(np); 2552 2553 if (of_symbols) { 2554 struct property *new_prop; 2555 for_each_property_of_node(overlay_base_symbols, prop) { 2556 2557 new_prop = __of_prop_dup(prop, GFP_KERNEL); 2558 if (!new_prop) { 2559 unittest(0, "__of_prop_dup() of '%s' from overlay_base node __symbols__", 2560 prop->name); 2561 goto err_unlock; 2562 } 2563 if (__of_add_property(of_symbols, new_prop)) { 2564 /* "name" auto-generated by unflatten */ 2565 if (!strcmp(new_prop->name, "name")) 2566 continue; 2567 unittest(0, "duplicate property '%s' in overlay_base node __symbols__", 2568 prop->name); 2569 goto err_unlock; 2570 } 2571 if (__of_add_property_sysfs(of_symbols, new_prop)) { 2572 unittest(0, "unable to add property '%s' in overlay_base node __symbols__ to sysfs", 2573 prop->name); 2574 goto err_unlock; 2575 } 2576 } 2577 } 2578 2579 mutex_unlock(&of_mutex); 2580 2581 2582 /* now do the normal overlay usage test */ 2583 2584 unittest(overlay_data_apply("overlay", NULL), 2585 "Adding overlay 'overlay' failed\n"); 2586 2587 unittest(overlay_data_apply("overlay_bad_add_dup_node", NULL), 2588 "Adding overlay 'overlay_bad_add_dup_node' failed\n"); 2589 2590 unittest(overlay_data_apply("overlay_bad_add_dup_prop", NULL), 2591 "Adding overlay 'overlay_bad_add_dup_prop' failed\n"); 2592 2593 unittest(overlay_data_apply("overlay_bad_phandle", NULL), 2594 "Adding overlay 'overlay_bad_phandle' failed\n"); 2595 2596 unittest(overlay_data_apply("overlay_bad_symbol", NULL), 2597 "Adding overlay 'overlay_bad_symbol' failed\n"); 2598 2599 return; 2600 2601 err_unlock: 2602 mutex_unlock(&of_mutex); 2603 } 2604 2605 #else 2606 2607 static inline __init void of_unittest_overlay_high_level(void) {} 2608 2609 #endif 2610 2611 static int __init of_unittest(void) 2612 { 2613 struct device_node *np; 2614 int res; 2615 2616 /* adding data for unittest */ 2617 2618 if (IS_ENABLED(CONFIG_UML)) 2619 unittest_unflatten_overlay_base(); 2620 2621 res = unittest_data_add(); 2622 if (res) 2623 return res; 2624 if (!of_aliases) 2625 of_aliases = of_find_node_by_path("/aliases"); 2626 2627 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); 2628 if (!np) { 2629 pr_info("No testcase data in device tree; not running tests\n"); 2630 return 0; 2631 } 2632 of_node_put(np); 2633 2634 pr_info("start of unittest - you will see error messages\n"); 2635 of_unittest_check_tree_linkage(); 2636 of_unittest_check_phandles(); 2637 of_unittest_find_node_by_name(); 2638 of_unittest_dynamic(); 2639 of_unittest_parse_phandle_with_args(); 2640 of_unittest_parse_phandle_with_args_map(); 2641 of_unittest_printf(); 2642 of_unittest_property_string(); 2643 of_unittest_property_copy(); 2644 of_unittest_changeset(); 2645 of_unittest_parse_interrupts(); 2646 of_unittest_parse_interrupts_extended(); 2647 of_unittest_parse_dma_ranges(); 2648 of_unittest_pci_dma_ranges(); 2649 of_unittest_match_node(); 2650 of_unittest_platform_populate(); 2651 of_unittest_overlay(); 2652 2653 /* Double check linkage after removing testcase data */ 2654 of_unittest_check_tree_linkage(); 2655 2656 of_unittest_overlay_high_level(); 2657 2658 pr_info("end of unittest - %i passed, %i failed\n", 2659 unittest_results.passed, unittest_results.failed); 2660 2661 return 0; 2662 } 2663 late_initcall(of_unittest); 2664