1 /* 2 * Self tests for device tree subsystem 3 */ 4 5 #define pr_fmt(fmt) "### dt-test ### " fmt 6 7 #include <linux/clk.h> 8 #include <linux/err.h> 9 #include <linux/errno.h> 10 #include <linux/hashtable.h> 11 #include <linux/module.h> 12 #include <linux/of.h> 13 #include <linux/of_fdt.h> 14 #include <linux/of_irq.h> 15 #include <linux/of_platform.h> 16 #include <linux/list.h> 17 #include <linux/mutex.h> 18 #include <linux/slab.h> 19 #include <linux/device.h> 20 #include <linux/platform_device.h> 21 #include <linux/of_platform.h> 22 23 #include "of_private.h" 24 25 static struct selftest_results { 26 int passed; 27 int failed; 28 } selftest_results; 29 30 #define NO_OF_NODES 3 31 static struct device_node *nodes[NO_OF_NODES]; 32 static int last_node_index; 33 static bool selftest_live_tree; 34 35 #define selftest(result, fmt, ...) ({ \ 36 bool failed = !(result); \ 37 if (failed) { \ 38 selftest_results.failed++; \ 39 pr_err("FAIL %s():%i " fmt, __func__, __LINE__, ##__VA_ARGS__); \ 40 } else { \ 41 selftest_results.passed++; \ 42 pr_debug("pass %s():%i\n", __func__, __LINE__); \ 43 } \ 44 failed; \ 45 }) 46 47 static void __init of_selftest_find_node_by_name(void) 48 { 49 struct device_node *np; 50 const char *options; 51 52 np = of_find_node_by_path("/testcase-data"); 53 selftest(np && !strcmp("/testcase-data", np->full_name), 54 "find /testcase-data failed\n"); 55 of_node_put(np); 56 57 /* Test if trailing '/' works */ 58 np = of_find_node_by_path("/testcase-data/"); 59 selftest(!np, "trailing '/' on /testcase-data/ should fail\n"); 60 61 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); 62 selftest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", np->full_name), 63 "find /testcase-data/phandle-tests/consumer-a failed\n"); 64 of_node_put(np); 65 66 np = of_find_node_by_path("testcase-alias"); 67 selftest(np && !strcmp("/testcase-data", np->full_name), 68 "find testcase-alias failed\n"); 69 of_node_put(np); 70 71 /* Test if trailing '/' works on aliases */ 72 np = of_find_node_by_path("testcase-alias/"); 73 selftest(!np, "trailing '/' on testcase-alias/ should fail\n"); 74 75 np = of_find_node_by_path("testcase-alias/phandle-tests/consumer-a"); 76 selftest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", np->full_name), 77 "find testcase-alias/phandle-tests/consumer-a failed\n"); 78 of_node_put(np); 79 80 np = of_find_node_by_path("/testcase-data/missing-path"); 81 selftest(!np, "non-existent path returned node %s\n", np->full_name); 82 of_node_put(np); 83 84 np = of_find_node_by_path("missing-alias"); 85 selftest(!np, "non-existent alias returned node %s\n", np->full_name); 86 of_node_put(np); 87 88 np = of_find_node_by_path("testcase-alias/missing-path"); 89 selftest(!np, "non-existent alias with relative path returned node %s\n", np->full_name); 90 of_node_put(np); 91 92 np = of_find_node_opts_by_path("/testcase-data:testoption", &options); 93 selftest(np && !strcmp("testoption", options), 94 "option path test failed\n"); 95 of_node_put(np); 96 97 np = of_find_node_opts_by_path("/testcase-data:testoption", NULL); 98 selftest(np, "NULL option path test failed\n"); 99 of_node_put(np); 100 101 np = of_find_node_opts_by_path("testcase-alias:testaliasoption", 102 &options); 103 selftest(np && !strcmp("testaliasoption", options), 104 "option alias path test failed\n"); 105 of_node_put(np); 106 107 np = of_find_node_opts_by_path("testcase-alias:testaliasoption", NULL); 108 selftest(np, "NULL option alias path test failed\n"); 109 of_node_put(np); 110 111 options = "testoption"; 112 np = of_find_node_opts_by_path("testcase-alias", &options); 113 selftest(np && !options, "option clearing test failed\n"); 114 of_node_put(np); 115 116 options = "testoption"; 117 np = of_find_node_opts_by_path("/", &options); 118 selftest(np && !options, "option clearing root node test failed\n"); 119 of_node_put(np); 120 } 121 122 static void __init of_selftest_dynamic(void) 123 { 124 struct device_node *np; 125 struct property *prop; 126 127 np = of_find_node_by_path("/testcase-data"); 128 if (!np) { 129 pr_err("missing testcase data\n"); 130 return; 131 } 132 133 /* Array of 4 properties for the purpose of testing */ 134 prop = kzalloc(sizeof(*prop) * 4, GFP_KERNEL); 135 if (!prop) { 136 selftest(0, "kzalloc() failed\n"); 137 return; 138 } 139 140 /* Add a new property - should pass*/ 141 prop->name = "new-property"; 142 prop->value = "new-property-data"; 143 prop->length = strlen(prop->value); 144 selftest(of_add_property(np, prop) == 0, "Adding a new property failed\n"); 145 146 /* Try to add an existing property - should fail */ 147 prop++; 148 prop->name = "new-property"; 149 prop->value = "new-property-data-should-fail"; 150 prop->length = strlen(prop->value); 151 selftest(of_add_property(np, prop) != 0, 152 "Adding an existing property should have failed\n"); 153 154 /* Try to modify an existing property - should pass */ 155 prop->value = "modify-property-data-should-pass"; 156 prop->length = strlen(prop->value); 157 selftest(of_update_property(np, prop) == 0, 158 "Updating an existing property should have passed\n"); 159 160 /* Try to modify non-existent property - should pass*/ 161 prop++; 162 prop->name = "modify-property"; 163 prop->value = "modify-missing-property-data-should-pass"; 164 prop->length = strlen(prop->value); 165 selftest(of_update_property(np, prop) == 0, 166 "Updating a missing property should have passed\n"); 167 168 /* Remove property - should pass */ 169 selftest(of_remove_property(np, prop) == 0, 170 "Removing a property should have passed\n"); 171 172 /* Adding very large property - should pass */ 173 prop++; 174 prop->name = "large-property-PAGE_SIZEx8"; 175 prop->length = PAGE_SIZE * 8; 176 prop->value = kzalloc(prop->length, GFP_KERNEL); 177 selftest(prop->value != NULL, "Unable to allocate large buffer\n"); 178 if (prop->value) 179 selftest(of_add_property(np, prop) == 0, 180 "Adding a large property should have passed\n"); 181 } 182 183 static int __init of_selftest_check_node_linkage(struct device_node *np) 184 { 185 struct device_node *child; 186 int count = 0, rc; 187 188 for_each_child_of_node(np, child) { 189 if (child->parent != np) { 190 pr_err("Child node %s links to wrong parent %s\n", 191 child->name, np->name); 192 return -EINVAL; 193 } 194 195 rc = of_selftest_check_node_linkage(child); 196 if (rc < 0) 197 return rc; 198 count += rc; 199 } 200 201 return count + 1; 202 } 203 204 static void __init of_selftest_check_tree_linkage(void) 205 { 206 struct device_node *np; 207 int allnode_count = 0, child_count; 208 209 if (!of_root) 210 return; 211 212 for_each_of_allnodes(np) 213 allnode_count++; 214 child_count = of_selftest_check_node_linkage(of_root); 215 216 selftest(child_count > 0, "Device node data structure is corrupted\n"); 217 selftest(child_count == allnode_count, "allnodes list size (%i) doesn't match" 218 "sibling lists size (%i)\n", allnode_count, child_count); 219 pr_debug("allnodes list size (%i); sibling lists size (%i)\n", allnode_count, child_count); 220 } 221 222 struct node_hash { 223 struct hlist_node node; 224 struct device_node *np; 225 }; 226 227 static DEFINE_HASHTABLE(phandle_ht, 8); 228 static void __init of_selftest_check_phandles(void) 229 { 230 struct device_node *np; 231 struct node_hash *nh; 232 struct hlist_node *tmp; 233 int i, dup_count = 0, phandle_count = 0; 234 235 for_each_of_allnodes(np) { 236 if (!np->phandle) 237 continue; 238 239 hash_for_each_possible(phandle_ht, nh, node, np->phandle) { 240 if (nh->np->phandle == np->phandle) { 241 pr_info("Duplicate phandle! %i used by %s and %s\n", 242 np->phandle, nh->np->full_name, np->full_name); 243 dup_count++; 244 break; 245 } 246 } 247 248 nh = kzalloc(sizeof(*nh), GFP_KERNEL); 249 if (WARN_ON(!nh)) 250 return; 251 252 nh->np = np; 253 hash_add(phandle_ht, &nh->node, np->phandle); 254 phandle_count++; 255 } 256 selftest(dup_count == 0, "Found %i duplicates in %i phandles\n", 257 dup_count, phandle_count); 258 259 /* Clean up */ 260 hash_for_each_safe(phandle_ht, i, tmp, nh, node) { 261 hash_del(&nh->node); 262 kfree(nh); 263 } 264 } 265 266 static void __init of_selftest_parse_phandle_with_args(void) 267 { 268 struct device_node *np; 269 struct of_phandle_args args; 270 int i, rc; 271 272 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); 273 if (!np) { 274 pr_err("missing testcase data\n"); 275 return; 276 } 277 278 rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells"); 279 selftest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc); 280 281 for (i = 0; i < 8; i++) { 282 bool passed = true; 283 rc = of_parse_phandle_with_args(np, "phandle-list", 284 "#phandle-cells", i, &args); 285 286 /* Test the values from tests-phandle.dtsi */ 287 switch (i) { 288 case 0: 289 passed &= !rc; 290 passed &= (args.args_count == 1); 291 passed &= (args.args[0] == (i + 1)); 292 break; 293 case 1: 294 passed &= !rc; 295 passed &= (args.args_count == 2); 296 passed &= (args.args[0] == (i + 1)); 297 passed &= (args.args[1] == 0); 298 break; 299 case 2: 300 passed &= (rc == -ENOENT); 301 break; 302 case 3: 303 passed &= !rc; 304 passed &= (args.args_count == 3); 305 passed &= (args.args[0] == (i + 1)); 306 passed &= (args.args[1] == 4); 307 passed &= (args.args[2] == 3); 308 break; 309 case 4: 310 passed &= !rc; 311 passed &= (args.args_count == 2); 312 passed &= (args.args[0] == (i + 1)); 313 passed &= (args.args[1] == 100); 314 break; 315 case 5: 316 passed &= !rc; 317 passed &= (args.args_count == 0); 318 break; 319 case 6: 320 passed &= !rc; 321 passed &= (args.args_count == 1); 322 passed &= (args.args[0] == (i + 1)); 323 break; 324 case 7: 325 passed &= (rc == -ENOENT); 326 break; 327 default: 328 passed = false; 329 } 330 331 selftest(passed, "index %i - data error on node %s rc=%i\n", 332 i, args.np->full_name, rc); 333 } 334 335 /* Check for missing list property */ 336 rc = of_parse_phandle_with_args(np, "phandle-list-missing", 337 "#phandle-cells", 0, &args); 338 selftest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc); 339 rc = of_count_phandle_with_args(np, "phandle-list-missing", 340 "#phandle-cells"); 341 selftest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc); 342 343 /* Check for missing cells property */ 344 rc = of_parse_phandle_with_args(np, "phandle-list", 345 "#phandle-cells-missing", 0, &args); 346 selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 347 rc = of_count_phandle_with_args(np, "phandle-list", 348 "#phandle-cells-missing"); 349 selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 350 351 /* Check for bad phandle in list */ 352 rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle", 353 "#phandle-cells", 0, &args); 354 selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 355 rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle", 356 "#phandle-cells"); 357 selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 358 359 /* Check for incorrectly formed argument list */ 360 rc = of_parse_phandle_with_args(np, "phandle-list-bad-args", 361 "#phandle-cells", 1, &args); 362 selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 363 rc = of_count_phandle_with_args(np, "phandle-list-bad-args", 364 "#phandle-cells"); 365 selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 366 } 367 368 static void __init of_selftest_property_string(void) 369 { 370 const char *strings[4]; 371 struct device_node *np; 372 int rc; 373 374 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); 375 if (!np) { 376 pr_err("No testcase data in device tree\n"); 377 return; 378 } 379 380 rc = of_property_match_string(np, "phandle-list-names", "first"); 381 selftest(rc == 0, "first expected:0 got:%i\n", rc); 382 rc = of_property_match_string(np, "phandle-list-names", "second"); 383 selftest(rc == 1, "second expected:0 got:%i\n", rc); 384 rc = of_property_match_string(np, "phandle-list-names", "third"); 385 selftest(rc == 2, "third expected:0 got:%i\n", rc); 386 rc = of_property_match_string(np, "phandle-list-names", "fourth"); 387 selftest(rc == -ENODATA, "unmatched string; rc=%i\n", rc); 388 rc = of_property_match_string(np, "missing-property", "blah"); 389 selftest(rc == -EINVAL, "missing property; rc=%i\n", rc); 390 rc = of_property_match_string(np, "empty-property", "blah"); 391 selftest(rc == -ENODATA, "empty property; rc=%i\n", rc); 392 rc = of_property_match_string(np, "unterminated-string", "blah"); 393 selftest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc); 394 395 /* of_property_count_strings() tests */ 396 rc = of_property_count_strings(np, "string-property"); 397 selftest(rc == 1, "Incorrect string count; rc=%i\n", rc); 398 rc = of_property_count_strings(np, "phandle-list-names"); 399 selftest(rc == 3, "Incorrect string count; rc=%i\n", rc); 400 rc = of_property_count_strings(np, "unterminated-string"); 401 selftest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc); 402 rc = of_property_count_strings(np, "unterminated-string-list"); 403 selftest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc); 404 405 /* of_property_read_string_index() tests */ 406 rc = of_property_read_string_index(np, "string-property", 0, strings); 407 selftest(rc == 0 && !strcmp(strings[0], "foobar"), "of_property_read_string_index() failure; rc=%i\n", rc); 408 strings[0] = NULL; 409 rc = of_property_read_string_index(np, "string-property", 1, strings); 410 selftest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc); 411 rc = of_property_read_string_index(np, "phandle-list-names", 0, strings); 412 selftest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc); 413 rc = of_property_read_string_index(np, "phandle-list-names", 1, strings); 414 selftest(rc == 0 && !strcmp(strings[0], "second"), "of_property_read_string_index() failure; rc=%i\n", rc); 415 rc = of_property_read_string_index(np, "phandle-list-names", 2, strings); 416 selftest(rc == 0 && !strcmp(strings[0], "third"), "of_property_read_string_index() failure; rc=%i\n", rc); 417 strings[0] = NULL; 418 rc = of_property_read_string_index(np, "phandle-list-names", 3, strings); 419 selftest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc); 420 strings[0] = NULL; 421 rc = of_property_read_string_index(np, "unterminated-string", 0, strings); 422 selftest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc); 423 rc = of_property_read_string_index(np, "unterminated-string-list", 0, strings); 424 selftest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc); 425 strings[0] = NULL; 426 rc = of_property_read_string_index(np, "unterminated-string-list", 2, strings); /* should fail */ 427 selftest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc); 428 strings[1] = NULL; 429 430 /* of_property_read_string_array() tests */ 431 rc = of_property_read_string_array(np, "string-property", strings, 4); 432 selftest(rc == 1, "Incorrect string count; rc=%i\n", rc); 433 rc = of_property_read_string_array(np, "phandle-list-names", strings, 4); 434 selftest(rc == 3, "Incorrect string count; rc=%i\n", rc); 435 rc = of_property_read_string_array(np, "unterminated-string", strings, 4); 436 selftest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc); 437 /* -- An incorrectly formed string should cause a failure */ 438 rc = of_property_read_string_array(np, "unterminated-string-list", strings, 4); 439 selftest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc); 440 /* -- parsing the correctly formed strings should still work: */ 441 strings[2] = NULL; 442 rc = of_property_read_string_array(np, "unterminated-string-list", strings, 2); 443 selftest(rc == 2 && strings[2] == NULL, "of_property_read_string_array() failure; rc=%i\n", rc); 444 strings[1] = NULL; 445 rc = of_property_read_string_array(np, "phandle-list-names", strings, 1); 446 selftest(rc == 1 && strings[1] == NULL, "Overwrote end of string array; rc=%i, str='%s'\n", rc, strings[1]); 447 } 448 449 #define propcmp(p1, p2) (((p1)->length == (p2)->length) && \ 450 (p1)->value && (p2)->value && \ 451 !memcmp((p1)->value, (p2)->value, (p1)->length) && \ 452 !strcmp((p1)->name, (p2)->name)) 453 static void __init of_selftest_property_copy(void) 454 { 455 #ifdef CONFIG_OF_DYNAMIC 456 struct property p1 = { .name = "p1", .length = 0, .value = "" }; 457 struct property p2 = { .name = "p2", .length = 5, .value = "abcd" }; 458 struct property *new; 459 460 new = __of_prop_dup(&p1, GFP_KERNEL); 461 selftest(new && propcmp(&p1, new), "empty property didn't copy correctly\n"); 462 kfree(new->value); 463 kfree(new->name); 464 kfree(new); 465 466 new = __of_prop_dup(&p2, GFP_KERNEL); 467 selftest(new && propcmp(&p2, new), "non-empty property didn't copy correctly\n"); 468 kfree(new->value); 469 kfree(new->name); 470 kfree(new); 471 #endif 472 } 473 474 static void __init of_selftest_changeset(void) 475 { 476 #ifdef CONFIG_OF_DYNAMIC 477 struct property *ppadd, padd = { .name = "prop-add", .length = 0, .value = "" }; 478 struct property *ppupdate, pupdate = { .name = "prop-update", .length = 5, .value = "abcd" }; 479 struct property *ppremove; 480 struct device_node *n1, *n2, *n21, *nremove, *parent, *np; 481 struct of_changeset chgset; 482 483 of_changeset_init(&chgset); 484 n1 = __of_node_dup(NULL, "/testcase-data/changeset/n1"); 485 selftest(n1, "testcase setup failure\n"); 486 n2 = __of_node_dup(NULL, "/testcase-data/changeset/n2"); 487 selftest(n2, "testcase setup failure\n"); 488 n21 = __of_node_dup(NULL, "%s/%s", "/testcase-data/changeset/n2", "n21"); 489 selftest(n21, "testcase setup failure %p\n", n21); 490 nremove = of_find_node_by_path("/testcase-data/changeset/node-remove"); 491 selftest(nremove, "testcase setup failure\n"); 492 ppadd = __of_prop_dup(&padd, GFP_KERNEL); 493 selftest(ppadd, "testcase setup failure\n"); 494 ppupdate = __of_prop_dup(&pupdate, GFP_KERNEL); 495 selftest(ppupdate, "testcase setup failure\n"); 496 parent = nremove->parent; 497 n1->parent = parent; 498 n2->parent = parent; 499 n21->parent = n2; 500 n2->child = n21; 501 ppremove = of_find_property(parent, "prop-remove", NULL); 502 selftest(ppremove, "failed to find removal prop"); 503 504 of_changeset_init(&chgset); 505 selftest(!of_changeset_attach_node(&chgset, n1), "fail attach n1\n"); 506 selftest(!of_changeset_attach_node(&chgset, n2), "fail attach n2\n"); 507 selftest(!of_changeset_detach_node(&chgset, nremove), "fail remove node\n"); 508 selftest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n"); 509 selftest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop\n"); 510 selftest(!of_changeset_update_property(&chgset, parent, ppupdate), "fail update prop\n"); 511 selftest(!of_changeset_remove_property(&chgset, parent, ppremove), "fail remove prop\n"); 512 mutex_lock(&of_mutex); 513 selftest(!of_changeset_apply(&chgset), "apply failed\n"); 514 mutex_unlock(&of_mutex); 515 516 /* Make sure node names are constructed correctly */ 517 selftest((np = of_find_node_by_path("/testcase-data/changeset/n2/n21")), 518 "'%s' not added\n", n21->full_name); 519 of_node_put(np); 520 521 mutex_lock(&of_mutex); 522 selftest(!of_changeset_revert(&chgset), "revert failed\n"); 523 mutex_unlock(&of_mutex); 524 525 of_changeset_destroy(&chgset); 526 #endif 527 } 528 529 static void __init of_selftest_parse_interrupts(void) 530 { 531 struct device_node *np; 532 struct of_phandle_args args; 533 int i, rc; 534 535 np = of_find_node_by_path("/testcase-data/interrupts/interrupts0"); 536 if (!np) { 537 pr_err("missing testcase data\n"); 538 return; 539 } 540 541 for (i = 0; i < 4; i++) { 542 bool passed = true; 543 args.args_count = 0; 544 rc = of_irq_parse_one(np, i, &args); 545 546 passed &= !rc; 547 passed &= (args.args_count == 1); 548 passed &= (args.args[0] == (i + 1)); 549 550 selftest(passed, "index %i - data error on node %s rc=%i\n", 551 i, args.np->full_name, rc); 552 } 553 of_node_put(np); 554 555 np = of_find_node_by_path("/testcase-data/interrupts/interrupts1"); 556 if (!np) { 557 pr_err("missing testcase data\n"); 558 return; 559 } 560 561 for (i = 0; i < 4; i++) { 562 bool passed = true; 563 args.args_count = 0; 564 rc = of_irq_parse_one(np, i, &args); 565 566 /* Test the values from tests-phandle.dtsi */ 567 switch (i) { 568 case 0: 569 passed &= !rc; 570 passed &= (args.args_count == 1); 571 passed &= (args.args[0] == 9); 572 break; 573 case 1: 574 passed &= !rc; 575 passed &= (args.args_count == 3); 576 passed &= (args.args[0] == 10); 577 passed &= (args.args[1] == 11); 578 passed &= (args.args[2] == 12); 579 break; 580 case 2: 581 passed &= !rc; 582 passed &= (args.args_count == 2); 583 passed &= (args.args[0] == 13); 584 passed &= (args.args[1] == 14); 585 break; 586 case 3: 587 passed &= !rc; 588 passed &= (args.args_count == 2); 589 passed &= (args.args[0] == 15); 590 passed &= (args.args[1] == 16); 591 break; 592 default: 593 passed = false; 594 } 595 selftest(passed, "index %i - data error on node %s rc=%i\n", 596 i, args.np->full_name, rc); 597 } 598 of_node_put(np); 599 } 600 601 static void __init of_selftest_parse_interrupts_extended(void) 602 { 603 struct device_node *np; 604 struct of_phandle_args args; 605 int i, rc; 606 607 np = of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0"); 608 if (!np) { 609 pr_err("missing testcase data\n"); 610 return; 611 } 612 613 for (i = 0; i < 7; i++) { 614 bool passed = true; 615 rc = of_irq_parse_one(np, i, &args); 616 617 /* Test the values from tests-phandle.dtsi */ 618 switch (i) { 619 case 0: 620 passed &= !rc; 621 passed &= (args.args_count == 1); 622 passed &= (args.args[0] == 1); 623 break; 624 case 1: 625 passed &= !rc; 626 passed &= (args.args_count == 3); 627 passed &= (args.args[0] == 2); 628 passed &= (args.args[1] == 3); 629 passed &= (args.args[2] == 4); 630 break; 631 case 2: 632 passed &= !rc; 633 passed &= (args.args_count == 2); 634 passed &= (args.args[0] == 5); 635 passed &= (args.args[1] == 6); 636 break; 637 case 3: 638 passed &= !rc; 639 passed &= (args.args_count == 1); 640 passed &= (args.args[0] == 9); 641 break; 642 case 4: 643 passed &= !rc; 644 passed &= (args.args_count == 3); 645 passed &= (args.args[0] == 10); 646 passed &= (args.args[1] == 11); 647 passed &= (args.args[2] == 12); 648 break; 649 case 5: 650 passed &= !rc; 651 passed &= (args.args_count == 2); 652 passed &= (args.args[0] == 13); 653 passed &= (args.args[1] == 14); 654 break; 655 case 6: 656 passed &= !rc; 657 passed &= (args.args_count == 1); 658 passed &= (args.args[0] == 15); 659 break; 660 default: 661 passed = false; 662 } 663 664 selftest(passed, "index %i - data error on node %s rc=%i\n", 665 i, args.np->full_name, rc); 666 } 667 of_node_put(np); 668 } 669 670 static struct of_device_id match_node_table[] = { 671 { .data = "A", .name = "name0", }, /* Name alone is lowest priority */ 672 { .data = "B", .type = "type1", }, /* followed by type alone */ 673 674 { .data = "Ca", .name = "name2", .type = "type1", }, /* followed by both together */ 675 { .data = "Cb", .name = "name2", }, /* Only match when type doesn't match */ 676 { .data = "Cc", .name = "name2", .type = "type2", }, 677 678 { .data = "E", .compatible = "compat3" }, 679 { .data = "G", .compatible = "compat2", }, 680 { .data = "H", .compatible = "compat2", .name = "name5", }, 681 { .data = "I", .compatible = "compat2", .type = "type1", }, 682 { .data = "J", .compatible = "compat2", .type = "type1", .name = "name8", }, 683 { .data = "K", .compatible = "compat2", .name = "name9", }, 684 {} 685 }; 686 687 static struct { 688 const char *path; 689 const char *data; 690 } match_node_tests[] = { 691 { .path = "/testcase-data/match-node/name0", .data = "A", }, 692 { .path = "/testcase-data/match-node/name1", .data = "B", }, 693 { .path = "/testcase-data/match-node/a/name2", .data = "Ca", }, 694 { .path = "/testcase-data/match-node/b/name2", .data = "Cb", }, 695 { .path = "/testcase-data/match-node/c/name2", .data = "Cc", }, 696 { .path = "/testcase-data/match-node/name3", .data = "E", }, 697 { .path = "/testcase-data/match-node/name4", .data = "G", }, 698 { .path = "/testcase-data/match-node/name5", .data = "H", }, 699 { .path = "/testcase-data/match-node/name6", .data = "G", }, 700 { .path = "/testcase-data/match-node/name7", .data = "I", }, 701 { .path = "/testcase-data/match-node/name8", .data = "J", }, 702 { .path = "/testcase-data/match-node/name9", .data = "K", }, 703 }; 704 705 static void __init of_selftest_match_node(void) 706 { 707 struct device_node *np; 708 const struct of_device_id *match; 709 int i; 710 711 for (i = 0; i < ARRAY_SIZE(match_node_tests); i++) { 712 np = of_find_node_by_path(match_node_tests[i].path); 713 if (!np) { 714 selftest(0, "missing testcase node %s\n", 715 match_node_tests[i].path); 716 continue; 717 } 718 719 match = of_match_node(match_node_table, np); 720 if (!match) { 721 selftest(0, "%s didn't match anything\n", 722 match_node_tests[i].path); 723 continue; 724 } 725 726 if (strcmp(match->data, match_node_tests[i].data) != 0) { 727 selftest(0, "%s got wrong match. expected %s, got %s\n", 728 match_node_tests[i].path, match_node_tests[i].data, 729 (const char *)match->data); 730 continue; 731 } 732 selftest(1, "passed"); 733 } 734 } 735 736 struct device test_bus = { 737 .init_name = "unittest-bus", 738 }; 739 static void __init of_selftest_platform_populate(void) 740 { 741 int irq, rc; 742 struct device_node *np, *child, *grandchild; 743 struct platform_device *pdev; 744 struct of_device_id match[] = { 745 { .compatible = "test-device", }, 746 {} 747 }; 748 749 np = of_find_node_by_path("/testcase-data"); 750 of_platform_populate(np, of_default_bus_match_table, NULL, NULL); 751 752 /* Test that a missing irq domain returns -EPROBE_DEFER */ 753 np = of_find_node_by_path("/testcase-data/testcase-device1"); 754 pdev = of_find_device_by_node(np); 755 selftest(pdev, "device 1 creation failed\n"); 756 757 irq = platform_get_irq(pdev, 0); 758 selftest(irq == -EPROBE_DEFER, "device deferred probe failed - %d\n", irq); 759 760 /* Test that a parsing failure does not return -EPROBE_DEFER */ 761 np = of_find_node_by_path("/testcase-data/testcase-device2"); 762 pdev = of_find_device_by_node(np); 763 selftest(pdev, "device 2 creation failed\n"); 764 irq = platform_get_irq(pdev, 0); 765 selftest(irq < 0 && irq != -EPROBE_DEFER, "device parsing error failed - %d\n", irq); 766 767 if (selftest(np = of_find_node_by_path("/testcase-data/platform-tests"), 768 "No testcase data in device tree\n")); 769 return; 770 771 if (selftest(!(rc = device_register(&test_bus)), 772 "testbus registration failed; rc=%i\n", rc)); 773 return; 774 775 for_each_child_of_node(np, child) { 776 of_platform_populate(child, match, NULL, &test_bus); 777 for_each_child_of_node(child, grandchild) 778 selftest(of_find_device_by_node(grandchild), 779 "Could not create device for node '%s'\n", 780 grandchild->name); 781 } 782 783 of_platform_depopulate(&test_bus); 784 for_each_child_of_node(np, child) { 785 for_each_child_of_node(child, grandchild) 786 selftest(!of_find_device_by_node(grandchild), 787 "device didn't get destroyed '%s'\n", 788 grandchild->name); 789 } 790 791 device_unregister(&test_bus); 792 of_node_put(np); 793 } 794 795 /** 796 * update_node_properties - adds the properties 797 * of np into dup node (present in live tree) and 798 * updates parent of children of np to dup. 799 * 800 * @np: node already present in live tree 801 * @dup: node present in live tree to be updated 802 */ 803 static void update_node_properties(struct device_node *np, 804 struct device_node *dup) 805 { 806 struct property *prop; 807 struct device_node *child; 808 809 for_each_property_of_node(np, prop) 810 of_add_property(dup, prop); 811 812 for_each_child_of_node(np, child) 813 child->parent = dup; 814 } 815 816 /** 817 * attach_node_and_children - attaches nodes 818 * and its children to live tree 819 * 820 * @np: Node to attach to live tree 821 */ 822 static int attach_node_and_children(struct device_node *np) 823 { 824 struct device_node *next, *dup, *child; 825 826 dup = of_find_node_by_path(np->full_name); 827 if (dup) { 828 update_node_properties(np, dup); 829 return 0; 830 } 831 832 /* Children of the root need to be remembered for removal */ 833 if (np->parent == of_root) { 834 if (WARN_ON(last_node_index >= NO_OF_NODES)) 835 return -EINVAL; 836 nodes[last_node_index++] = np; 837 } 838 839 child = np->child; 840 np->child = NULL; 841 np->sibling = NULL; 842 of_attach_node(np); 843 while (child) { 844 next = child->sibling; 845 attach_node_and_children(child); 846 child = next; 847 } 848 849 return 0; 850 } 851 852 /** 853 * selftest_data_add - Reads, copies data from 854 * linked tree and attaches it to the live tree 855 */ 856 static int __init selftest_data_add(void) 857 { 858 void *selftest_data; 859 struct device_node *selftest_data_node, *np; 860 extern uint8_t __dtb_testcases_begin[]; 861 extern uint8_t __dtb_testcases_end[]; 862 const int size = __dtb_testcases_end - __dtb_testcases_begin; 863 int rc; 864 865 if (!size) { 866 pr_warn("%s: No testcase data to attach; not running tests\n", 867 __func__); 868 return -ENODATA; 869 } 870 871 /* creating copy */ 872 selftest_data = kmemdup(__dtb_testcases_begin, size, GFP_KERNEL); 873 874 if (!selftest_data) { 875 pr_warn("%s: Failed to allocate memory for selftest_data; " 876 "not running tests\n", __func__); 877 return -ENOMEM; 878 } 879 of_fdt_unflatten_tree(selftest_data, &selftest_data_node); 880 if (!selftest_data_node) { 881 pr_warn("%s: No tree to attach; not running tests\n", __func__); 882 return -ENODATA; 883 } 884 of_node_set_flag(selftest_data_node, OF_DETACHED); 885 rc = of_resolve_phandles(selftest_data_node); 886 if (rc) { 887 pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__, rc); 888 return -EINVAL; 889 } 890 891 if (!of_root) { 892 /* enabling flag for removing nodes */ 893 selftest_live_tree = true; 894 of_root = selftest_data_node; 895 896 for_each_of_allnodes(np) 897 __of_attach_node_sysfs(np); 898 of_aliases = of_find_node_by_path("/aliases"); 899 of_chosen = of_find_node_by_path("/chosen"); 900 return 0; 901 } 902 903 /* attach the sub-tree to live tree */ 904 np = selftest_data_node->child; 905 while (np) { 906 struct device_node *next = np->sibling; 907 np->parent = of_root; 908 attach_node_and_children(np); 909 np = next; 910 } 911 return 0; 912 } 913 914 /** 915 * detach_node_and_children - detaches node 916 * and its children from live tree 917 * 918 * @np: Node to detach from live tree 919 */ 920 static void detach_node_and_children(struct device_node *np) 921 { 922 while (np->child) 923 detach_node_and_children(np->child); 924 of_detach_node(np); 925 } 926 927 /** 928 * selftest_data_remove - removes the selftest data 929 * nodes from the live tree 930 */ 931 static void selftest_data_remove(void) 932 { 933 struct device_node *np; 934 struct property *prop; 935 936 if (selftest_live_tree) { 937 of_node_put(of_aliases); 938 of_node_put(of_chosen); 939 of_aliases = NULL; 940 of_chosen = NULL; 941 for_each_child_of_node(of_root, np) 942 detach_node_and_children(np); 943 __of_detach_node_sysfs(of_root); 944 of_root = NULL; 945 return; 946 } 947 948 while (last_node_index-- > 0) { 949 if (nodes[last_node_index]) { 950 np = of_find_node_by_path(nodes[last_node_index]->full_name); 951 if (np == nodes[last_node_index]) { 952 if (of_aliases == np) { 953 of_node_put(of_aliases); 954 of_aliases = NULL; 955 } 956 detach_node_and_children(np); 957 } else { 958 for_each_property_of_node(np, prop) { 959 if (strcmp(prop->name, "testcase-alias") == 0) 960 of_remove_property(np, prop); 961 } 962 } 963 } 964 } 965 } 966 967 #ifdef CONFIG_OF_OVERLAY 968 969 static int selftest_probe(struct platform_device *pdev) 970 { 971 struct device *dev = &pdev->dev; 972 struct device_node *np = dev->of_node; 973 974 if (np == NULL) { 975 dev_err(dev, "No OF data for device\n"); 976 return -EINVAL; 977 978 } 979 980 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name); 981 982 of_platform_populate(np, NULL, NULL, &pdev->dev); 983 984 return 0; 985 } 986 987 static int selftest_remove(struct platform_device *pdev) 988 { 989 struct device *dev = &pdev->dev; 990 struct device_node *np = dev->of_node; 991 992 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name); 993 return 0; 994 } 995 996 static struct of_device_id selftest_match[] = { 997 { .compatible = "selftest", }, 998 {}, 999 }; 1000 1001 static struct platform_driver selftest_driver = { 1002 .probe = selftest_probe, 1003 .remove = selftest_remove, 1004 .driver = { 1005 .name = "selftest", 1006 .owner = THIS_MODULE, 1007 .of_match_table = of_match_ptr(selftest_match), 1008 }, 1009 }; 1010 1011 /* get the platform device instantiated at the path */ 1012 static struct platform_device *of_path_to_platform_device(const char *path) 1013 { 1014 struct device_node *np; 1015 struct platform_device *pdev; 1016 1017 np = of_find_node_by_path(path); 1018 if (np == NULL) 1019 return NULL; 1020 1021 pdev = of_find_device_by_node(np); 1022 of_node_put(np); 1023 1024 return pdev; 1025 } 1026 1027 /* find out if a platform device exists at that path */ 1028 static int of_path_platform_device_exists(const char *path) 1029 { 1030 struct platform_device *pdev; 1031 1032 pdev = of_path_to_platform_device(path); 1033 platform_device_put(pdev); 1034 return pdev != NULL; 1035 } 1036 1037 static const char *selftest_path(int nr) 1038 { 1039 static char buf[256]; 1040 1041 snprintf(buf, sizeof(buf) - 1, 1042 "/testcase-data/overlay-node/test-bus/test-selftest%d", nr); 1043 buf[sizeof(buf) - 1] = '\0'; 1044 1045 return buf; 1046 } 1047 1048 static const char *overlay_path(int nr) 1049 { 1050 static char buf[256]; 1051 1052 snprintf(buf, sizeof(buf) - 1, 1053 "/testcase-data/overlay%d", nr); 1054 buf[sizeof(buf) - 1] = '\0'; 1055 1056 return buf; 1057 } 1058 1059 static const char *bus_path = "/testcase-data/overlay-node/test-bus"; 1060 1061 static int of_selftest_apply_overlay(int selftest_nr, int overlay_nr, 1062 int *overlay_id) 1063 { 1064 struct device_node *np = NULL; 1065 int ret, id = -1; 1066 1067 np = of_find_node_by_path(overlay_path(overlay_nr)); 1068 if (np == NULL) { 1069 selftest(0, "could not find overlay node @\"%s\"\n", 1070 overlay_path(overlay_nr)); 1071 ret = -EINVAL; 1072 goto out; 1073 } 1074 1075 ret = of_overlay_create(np); 1076 if (ret < 0) { 1077 selftest(0, "could not create overlay from \"%s\"\n", 1078 overlay_path(overlay_nr)); 1079 goto out; 1080 } 1081 id = ret; 1082 1083 ret = 0; 1084 1085 out: 1086 of_node_put(np); 1087 1088 if (overlay_id) 1089 *overlay_id = id; 1090 1091 return ret; 1092 } 1093 1094 /* apply an overlay while checking before and after states */ 1095 static int of_selftest_apply_overlay_check(int overlay_nr, int selftest_nr, 1096 int before, int after) 1097 { 1098 int ret; 1099 1100 /* selftest device must not be in before state */ 1101 if (of_path_platform_device_exists(selftest_path(selftest_nr)) 1102 != before) { 1103 selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n", 1104 overlay_path(overlay_nr), 1105 selftest_path(selftest_nr), 1106 !before ? "enabled" : "disabled"); 1107 return -EINVAL; 1108 } 1109 1110 ret = of_selftest_apply_overlay(overlay_nr, selftest_nr, NULL); 1111 if (ret != 0) { 1112 /* of_selftest_apply_overlay already called selftest() */ 1113 return ret; 1114 } 1115 1116 /* selftest device must be to set to after state */ 1117 if (of_path_platform_device_exists(selftest_path(selftest_nr)) 1118 != after) { 1119 selftest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n", 1120 overlay_path(overlay_nr), 1121 selftest_path(selftest_nr), 1122 !after ? "enabled" : "disabled"); 1123 return -EINVAL; 1124 } 1125 1126 return 0; 1127 } 1128 1129 /* apply an overlay and then revert it while checking before, after states */ 1130 static int of_selftest_apply_revert_overlay_check(int overlay_nr, 1131 int selftest_nr, int before, int after) 1132 { 1133 int ret, ov_id; 1134 1135 /* selftest device must be in before state */ 1136 if (of_path_platform_device_exists(selftest_path(selftest_nr)) 1137 != before) { 1138 selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n", 1139 overlay_path(overlay_nr), 1140 selftest_path(selftest_nr), 1141 !before ? "enabled" : "disabled"); 1142 return -EINVAL; 1143 } 1144 1145 /* apply the overlay */ 1146 ret = of_selftest_apply_overlay(overlay_nr, selftest_nr, &ov_id); 1147 if (ret != 0) { 1148 /* of_selftest_apply_overlay already called selftest() */ 1149 return ret; 1150 } 1151 1152 /* selftest device must be in after state */ 1153 if (of_path_platform_device_exists(selftest_path(selftest_nr)) 1154 != after) { 1155 selftest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n", 1156 overlay_path(overlay_nr), 1157 selftest_path(selftest_nr), 1158 !after ? "enabled" : "disabled"); 1159 return -EINVAL; 1160 } 1161 1162 ret = of_overlay_destroy(ov_id); 1163 if (ret != 0) { 1164 selftest(0, "overlay @\"%s\" failed to be destroyed @\"%s\"\n", 1165 overlay_path(overlay_nr), 1166 selftest_path(selftest_nr)); 1167 return ret; 1168 } 1169 1170 /* selftest device must be again in before state */ 1171 if (of_path_platform_device_exists(selftest_path(selftest_nr)) 1172 != before) { 1173 selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n", 1174 overlay_path(overlay_nr), 1175 selftest_path(selftest_nr), 1176 !before ? "enabled" : "disabled"); 1177 return -EINVAL; 1178 } 1179 1180 return 0; 1181 } 1182 1183 /* test activation of device */ 1184 static void of_selftest_overlay_0(void) 1185 { 1186 int ret; 1187 1188 /* device should enable */ 1189 ret = of_selftest_apply_overlay_check(0, 0, 0, 1); 1190 if (ret != 0) 1191 return; 1192 1193 selftest(1, "overlay test %d passed\n", 0); 1194 } 1195 1196 /* test deactivation of device */ 1197 static void of_selftest_overlay_1(void) 1198 { 1199 int ret; 1200 1201 /* device should disable */ 1202 ret = of_selftest_apply_overlay_check(1, 1, 1, 0); 1203 if (ret != 0) 1204 return; 1205 1206 selftest(1, "overlay test %d passed\n", 1); 1207 } 1208 1209 /* test activation of device */ 1210 static void of_selftest_overlay_2(void) 1211 { 1212 int ret; 1213 1214 /* device should enable */ 1215 ret = of_selftest_apply_overlay_check(2, 2, 0, 1); 1216 if (ret != 0) 1217 return; 1218 1219 selftest(1, "overlay test %d passed\n", 2); 1220 } 1221 1222 /* test deactivation of device */ 1223 static void of_selftest_overlay_3(void) 1224 { 1225 int ret; 1226 1227 /* device should disable */ 1228 ret = of_selftest_apply_overlay_check(3, 3, 1, 0); 1229 if (ret != 0) 1230 return; 1231 1232 selftest(1, "overlay test %d passed\n", 3); 1233 } 1234 1235 /* test activation of a full device node */ 1236 static void of_selftest_overlay_4(void) 1237 { 1238 int ret; 1239 1240 /* device should disable */ 1241 ret = of_selftest_apply_overlay_check(4, 4, 0, 1); 1242 if (ret != 0) 1243 return; 1244 1245 selftest(1, "overlay test %d passed\n", 4); 1246 } 1247 1248 /* test overlay apply/revert sequence */ 1249 static void of_selftest_overlay_5(void) 1250 { 1251 int ret; 1252 1253 /* device should disable */ 1254 ret = of_selftest_apply_revert_overlay_check(5, 5, 0, 1); 1255 if (ret != 0) 1256 return; 1257 1258 selftest(1, "overlay test %d passed\n", 5); 1259 } 1260 1261 /* test overlay application in sequence */ 1262 static void of_selftest_overlay_6(void) 1263 { 1264 struct device_node *np; 1265 int ret, i, ov_id[2]; 1266 int overlay_nr = 6, selftest_nr = 6; 1267 int before = 0, after = 1; 1268 1269 /* selftest device must be in before state */ 1270 for (i = 0; i < 2; i++) { 1271 if (of_path_platform_device_exists( 1272 selftest_path(selftest_nr + i)) 1273 != before) { 1274 selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n", 1275 overlay_path(overlay_nr + i), 1276 selftest_path(selftest_nr + i), 1277 !before ? "enabled" : "disabled"); 1278 return; 1279 } 1280 } 1281 1282 /* apply the overlays */ 1283 for (i = 0; i < 2; i++) { 1284 1285 np = of_find_node_by_path(overlay_path(overlay_nr + i)); 1286 if (np == NULL) { 1287 selftest(0, "could not find overlay node @\"%s\"\n", 1288 overlay_path(overlay_nr + i)); 1289 return; 1290 } 1291 1292 ret = of_overlay_create(np); 1293 if (ret < 0) { 1294 selftest(0, "could not create overlay from \"%s\"\n", 1295 overlay_path(overlay_nr + i)); 1296 return; 1297 } 1298 ov_id[i] = ret; 1299 } 1300 1301 for (i = 0; i < 2; i++) { 1302 /* selftest device must be in after state */ 1303 if (of_path_platform_device_exists( 1304 selftest_path(selftest_nr + i)) 1305 != after) { 1306 selftest(0, "overlay @\"%s\" failed @\"%s\" %s\n", 1307 overlay_path(overlay_nr + i), 1308 selftest_path(selftest_nr + i), 1309 !after ? "enabled" : "disabled"); 1310 return; 1311 } 1312 } 1313 1314 for (i = 1; i >= 0; i--) { 1315 ret = of_overlay_destroy(ov_id[i]); 1316 if (ret != 0) { 1317 selftest(0, "overlay @\"%s\" failed destroy @\"%s\"\n", 1318 overlay_path(overlay_nr + i), 1319 selftest_path(selftest_nr + i)); 1320 return; 1321 } 1322 } 1323 1324 for (i = 0; i < 2; i++) { 1325 /* selftest device must be again in before state */ 1326 if (of_path_platform_device_exists( 1327 selftest_path(selftest_nr + i)) 1328 != before) { 1329 selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n", 1330 overlay_path(overlay_nr + i), 1331 selftest_path(selftest_nr + i), 1332 !before ? "enabled" : "disabled"); 1333 return; 1334 } 1335 } 1336 1337 selftest(1, "overlay test %d passed\n", 6); 1338 } 1339 1340 /* test overlay application in sequence */ 1341 static void of_selftest_overlay_8(void) 1342 { 1343 struct device_node *np; 1344 int ret, i, ov_id[2]; 1345 int overlay_nr = 8, selftest_nr = 8; 1346 1347 /* we don't care about device state in this test */ 1348 1349 /* apply the overlays */ 1350 for (i = 0; i < 2; i++) { 1351 1352 np = of_find_node_by_path(overlay_path(overlay_nr + i)); 1353 if (np == NULL) { 1354 selftest(0, "could not find overlay node @\"%s\"\n", 1355 overlay_path(overlay_nr + i)); 1356 return; 1357 } 1358 1359 ret = of_overlay_create(np); 1360 if (ret < 0) { 1361 selftest(0, "could not create overlay from \"%s\"\n", 1362 overlay_path(overlay_nr + i)); 1363 return; 1364 } 1365 ov_id[i] = ret; 1366 } 1367 1368 /* now try to remove first overlay (it should fail) */ 1369 ret = of_overlay_destroy(ov_id[0]); 1370 if (ret == 0) { 1371 selftest(0, "overlay @\"%s\" was destroyed @\"%s\"\n", 1372 overlay_path(overlay_nr + 0), 1373 selftest_path(selftest_nr)); 1374 return; 1375 } 1376 1377 /* removing them in order should work */ 1378 for (i = 1; i >= 0; i--) { 1379 ret = of_overlay_destroy(ov_id[i]); 1380 if (ret != 0) { 1381 selftest(0, "overlay @\"%s\" not destroyed @\"%s\"\n", 1382 overlay_path(overlay_nr + i), 1383 selftest_path(selftest_nr)); 1384 return; 1385 } 1386 } 1387 1388 selftest(1, "overlay test %d passed\n", 8); 1389 } 1390 1391 /* test insertion of a bus with parent devices */ 1392 static void of_selftest_overlay_10(void) 1393 { 1394 int ret; 1395 char *child_path; 1396 1397 /* device should disable */ 1398 ret = of_selftest_apply_overlay_check(10, 10, 0, 1); 1399 if (selftest(ret == 0, "overlay test %d failed; overlay application\n", 10)) 1400 return; 1401 1402 child_path = kasprintf(GFP_KERNEL, "%s/test-selftest101", 1403 selftest_path(10)); 1404 if (selftest(child_path, "overlay test %d failed; kasprintf\n", 10)) 1405 return; 1406 1407 ret = of_path_platform_device_exists(child_path); 1408 kfree(child_path); 1409 if (selftest(ret, "overlay test %d failed; no child device\n", 10)) 1410 return; 1411 } 1412 1413 /* test insertion of a bus with parent devices (and revert) */ 1414 static void of_selftest_overlay_11(void) 1415 { 1416 int ret; 1417 1418 /* device should disable */ 1419 ret = of_selftest_apply_revert_overlay_check(11, 11, 0, 1); 1420 if (selftest(ret == 0, "overlay test %d failed; overlay application\n", 11)) 1421 return; 1422 } 1423 1424 static void __init of_selftest_overlay(void) 1425 { 1426 struct device_node *bus_np = NULL; 1427 int ret; 1428 1429 ret = platform_driver_register(&selftest_driver); 1430 if (ret != 0) { 1431 selftest(0, "could not register selftest driver\n"); 1432 goto out; 1433 } 1434 1435 bus_np = of_find_node_by_path(bus_path); 1436 if (bus_np == NULL) { 1437 selftest(0, "could not find bus_path \"%s\"\n", bus_path); 1438 goto out; 1439 } 1440 1441 ret = of_platform_populate(bus_np, of_default_bus_match_table, 1442 NULL, NULL); 1443 if (ret != 0) { 1444 selftest(0, "could not populate bus @ \"%s\"\n", bus_path); 1445 goto out; 1446 } 1447 1448 if (!of_path_platform_device_exists(selftest_path(100))) { 1449 selftest(0, "could not find selftest0 @ \"%s\"\n", 1450 selftest_path(100)); 1451 goto out; 1452 } 1453 1454 if (of_path_platform_device_exists(selftest_path(101))) { 1455 selftest(0, "selftest1 @ \"%s\" should not exist\n", 1456 selftest_path(101)); 1457 goto out; 1458 } 1459 1460 selftest(1, "basic infrastructure of overlays passed"); 1461 1462 /* tests in sequence */ 1463 of_selftest_overlay_0(); 1464 of_selftest_overlay_1(); 1465 of_selftest_overlay_2(); 1466 of_selftest_overlay_3(); 1467 of_selftest_overlay_4(); 1468 of_selftest_overlay_5(); 1469 of_selftest_overlay_6(); 1470 of_selftest_overlay_8(); 1471 1472 of_selftest_overlay_10(); 1473 of_selftest_overlay_11(); 1474 1475 out: 1476 of_node_put(bus_np); 1477 } 1478 1479 #else 1480 static inline void __init of_selftest_overlay(void) { } 1481 #endif 1482 1483 static int __init of_selftest(void) 1484 { 1485 struct device_node *np; 1486 int res; 1487 1488 /* adding data for selftest */ 1489 res = selftest_data_add(); 1490 if (res) 1491 return res; 1492 if (!of_aliases) 1493 of_aliases = of_find_node_by_path("/aliases"); 1494 1495 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); 1496 if (!np) { 1497 pr_info("No testcase data in device tree; not running tests\n"); 1498 return 0; 1499 } 1500 of_node_put(np); 1501 1502 pr_info("start of selftest - you will see error messages\n"); 1503 of_selftest_check_tree_linkage(); 1504 of_selftest_check_phandles(); 1505 of_selftest_find_node_by_name(); 1506 of_selftest_dynamic(); 1507 of_selftest_parse_phandle_with_args(); 1508 of_selftest_property_string(); 1509 of_selftest_property_copy(); 1510 of_selftest_changeset(); 1511 of_selftest_parse_interrupts(); 1512 of_selftest_parse_interrupts_extended(); 1513 of_selftest_match_node(); 1514 of_selftest_platform_populate(); 1515 of_selftest_overlay(); 1516 1517 /* removing selftest data from live tree */ 1518 selftest_data_remove(); 1519 1520 /* Double check linkage after removing testcase data */ 1521 of_selftest_check_tree_linkage(); 1522 1523 pr_info("end of selftest - %i passed, %i failed\n", 1524 selftest_results.passed, selftest_results.failed); 1525 1526 return 0; 1527 } 1528 late_initcall(of_selftest); 1529