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 <linux/i2c.h> 24 #include <linux/i2c-mux.h> 25 26 #include "of_private.h" 27 28 static struct unittest_results { 29 int passed; 30 int failed; 31 } unittest_results; 32 33 #define unittest(result, fmt, ...) ({ \ 34 bool failed = !(result); \ 35 if (failed) { \ 36 unittest_results.failed++; \ 37 pr_err("FAIL %s():%i " fmt, __func__, __LINE__, ##__VA_ARGS__); \ 38 } else { \ 39 unittest_results.passed++; \ 40 pr_debug("pass %s():%i\n", __func__, __LINE__); \ 41 } \ 42 failed; \ 43 }) 44 45 static void __init of_unittest_find_node_by_name(void) 46 { 47 struct device_node *np; 48 const char *options; 49 50 np = of_find_node_by_path("/testcase-data"); 51 unittest(np && !strcmp("/testcase-data", np->full_name), 52 "find /testcase-data failed\n"); 53 of_node_put(np); 54 55 /* Test if trailing '/' works */ 56 np = of_find_node_by_path("/testcase-data/"); 57 unittest(!np, "trailing '/' on /testcase-data/ should fail\n"); 58 59 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); 60 unittest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", np->full_name), 61 "find /testcase-data/phandle-tests/consumer-a failed\n"); 62 of_node_put(np); 63 64 np = of_find_node_by_path("testcase-alias"); 65 unittest(np && !strcmp("/testcase-data", np->full_name), 66 "find testcase-alias failed\n"); 67 of_node_put(np); 68 69 /* Test if trailing '/' works on aliases */ 70 np = of_find_node_by_path("testcase-alias/"); 71 unittest(!np, "trailing '/' on testcase-alias/ should fail\n"); 72 73 np = of_find_node_by_path("testcase-alias/phandle-tests/consumer-a"); 74 unittest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", np->full_name), 75 "find testcase-alias/phandle-tests/consumer-a failed\n"); 76 of_node_put(np); 77 78 np = of_find_node_by_path("/testcase-data/missing-path"); 79 unittest(!np, "non-existent path returned node %s\n", np->full_name); 80 of_node_put(np); 81 82 np = of_find_node_by_path("missing-alias"); 83 unittest(!np, "non-existent alias returned node %s\n", np->full_name); 84 of_node_put(np); 85 86 np = of_find_node_by_path("testcase-alias/missing-path"); 87 unittest(!np, "non-existent alias with relative path returned node %s\n", np->full_name); 88 of_node_put(np); 89 90 np = of_find_node_opts_by_path("/testcase-data:testoption", &options); 91 unittest(np && !strcmp("testoption", options), 92 "option path test failed\n"); 93 of_node_put(np); 94 95 np = of_find_node_opts_by_path("/testcase-data:test/option", &options); 96 unittest(np && !strcmp("test/option", options), 97 "option path test, subcase #1 failed\n"); 98 of_node_put(np); 99 100 np = of_find_node_opts_by_path("/testcase-data/testcase-device1:test/option", &options); 101 unittest(np && !strcmp("test/option", options), 102 "option path test, subcase #2 failed\n"); 103 of_node_put(np); 104 105 np = of_find_node_opts_by_path("/testcase-data:testoption", NULL); 106 unittest(np, "NULL option path test failed\n"); 107 of_node_put(np); 108 109 np = of_find_node_opts_by_path("testcase-alias:testaliasoption", 110 &options); 111 unittest(np && !strcmp("testaliasoption", options), 112 "option alias path test failed\n"); 113 of_node_put(np); 114 115 np = of_find_node_opts_by_path("testcase-alias:test/alias/option", 116 &options); 117 unittest(np && !strcmp("test/alias/option", options), 118 "option alias path test, subcase #1 failed\n"); 119 of_node_put(np); 120 121 np = of_find_node_opts_by_path("testcase-alias:testaliasoption", NULL); 122 unittest(np, "NULL option alias path test failed\n"); 123 of_node_put(np); 124 125 options = "testoption"; 126 np = of_find_node_opts_by_path("testcase-alias", &options); 127 unittest(np && !options, "option clearing test failed\n"); 128 of_node_put(np); 129 130 options = "testoption"; 131 np = of_find_node_opts_by_path("/", &options); 132 unittest(np && !options, "option clearing root node test failed\n"); 133 of_node_put(np); 134 } 135 136 static void __init of_unittest_dynamic(void) 137 { 138 struct device_node *np; 139 struct property *prop; 140 141 np = of_find_node_by_path("/testcase-data"); 142 if (!np) { 143 pr_err("missing testcase data\n"); 144 return; 145 } 146 147 /* Array of 4 properties for the purpose of testing */ 148 prop = kzalloc(sizeof(*prop) * 4, GFP_KERNEL); 149 if (!prop) { 150 unittest(0, "kzalloc() failed\n"); 151 return; 152 } 153 154 /* Add a new property - should pass*/ 155 prop->name = "new-property"; 156 prop->value = "new-property-data"; 157 prop->length = strlen(prop->value); 158 unittest(of_add_property(np, prop) == 0, "Adding a new property failed\n"); 159 160 /* Try to add an existing property - should fail */ 161 prop++; 162 prop->name = "new-property"; 163 prop->value = "new-property-data-should-fail"; 164 prop->length = strlen(prop->value); 165 unittest(of_add_property(np, prop) != 0, 166 "Adding an existing property should have failed\n"); 167 168 /* Try to modify an existing property - should pass */ 169 prop->value = "modify-property-data-should-pass"; 170 prop->length = strlen(prop->value); 171 unittest(of_update_property(np, prop) == 0, 172 "Updating an existing property should have passed\n"); 173 174 /* Try to modify non-existent property - should pass*/ 175 prop++; 176 prop->name = "modify-property"; 177 prop->value = "modify-missing-property-data-should-pass"; 178 prop->length = strlen(prop->value); 179 unittest(of_update_property(np, prop) == 0, 180 "Updating a missing property should have passed\n"); 181 182 /* Remove property - should pass */ 183 unittest(of_remove_property(np, prop) == 0, 184 "Removing a property should have passed\n"); 185 186 /* Adding very large property - should pass */ 187 prop++; 188 prop->name = "large-property-PAGE_SIZEx8"; 189 prop->length = PAGE_SIZE * 8; 190 prop->value = kzalloc(prop->length, GFP_KERNEL); 191 unittest(prop->value != NULL, "Unable to allocate large buffer\n"); 192 if (prop->value) 193 unittest(of_add_property(np, prop) == 0, 194 "Adding a large property should have passed\n"); 195 } 196 197 static int __init of_unittest_check_node_linkage(struct device_node *np) 198 { 199 struct device_node *child; 200 int count = 0, rc; 201 202 for_each_child_of_node(np, child) { 203 if (child->parent != np) { 204 pr_err("Child node %s links to wrong parent %s\n", 205 child->name, np->name); 206 return -EINVAL; 207 } 208 209 rc = of_unittest_check_node_linkage(child); 210 if (rc < 0) 211 return rc; 212 count += rc; 213 } 214 215 return count + 1; 216 } 217 218 static void __init of_unittest_check_tree_linkage(void) 219 { 220 struct device_node *np; 221 int allnode_count = 0, child_count; 222 223 if (!of_root) 224 return; 225 226 for_each_of_allnodes(np) 227 allnode_count++; 228 child_count = of_unittest_check_node_linkage(of_root); 229 230 unittest(child_count > 0, "Device node data structure is corrupted\n"); 231 unittest(child_count == allnode_count, 232 "allnodes list size (%i) doesn't match sibling lists size (%i)\n", 233 allnode_count, child_count); 234 pr_debug("allnodes list size (%i); sibling lists size (%i)\n", allnode_count, child_count); 235 } 236 237 struct node_hash { 238 struct hlist_node node; 239 struct device_node *np; 240 }; 241 242 static DEFINE_HASHTABLE(phandle_ht, 8); 243 static void __init of_unittest_check_phandles(void) 244 { 245 struct device_node *np; 246 struct node_hash *nh; 247 struct hlist_node *tmp; 248 int i, dup_count = 0, phandle_count = 0; 249 250 for_each_of_allnodes(np) { 251 if (!np->phandle) 252 continue; 253 254 hash_for_each_possible(phandle_ht, nh, node, np->phandle) { 255 if (nh->np->phandle == np->phandle) { 256 pr_info("Duplicate phandle! %i used by %s and %s\n", 257 np->phandle, nh->np->full_name, np->full_name); 258 dup_count++; 259 break; 260 } 261 } 262 263 nh = kzalloc(sizeof(*nh), GFP_KERNEL); 264 if (WARN_ON(!nh)) 265 return; 266 267 nh->np = np; 268 hash_add(phandle_ht, &nh->node, np->phandle); 269 phandle_count++; 270 } 271 unittest(dup_count == 0, "Found %i duplicates in %i phandles\n", 272 dup_count, phandle_count); 273 274 /* Clean up */ 275 hash_for_each_safe(phandle_ht, i, tmp, nh, node) { 276 hash_del(&nh->node); 277 kfree(nh); 278 } 279 } 280 281 static void __init of_unittest_parse_phandle_with_args(void) 282 { 283 struct device_node *np; 284 struct of_phandle_args args; 285 int i, rc; 286 287 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); 288 if (!np) { 289 pr_err("missing testcase data\n"); 290 return; 291 } 292 293 rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells"); 294 unittest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc); 295 296 for (i = 0; i < 8; i++) { 297 bool passed = true; 298 299 rc = of_parse_phandle_with_args(np, "phandle-list", 300 "#phandle-cells", i, &args); 301 302 /* Test the values from tests-phandle.dtsi */ 303 switch (i) { 304 case 0: 305 passed &= !rc; 306 passed &= (args.args_count == 1); 307 passed &= (args.args[0] == (i + 1)); 308 break; 309 case 1: 310 passed &= !rc; 311 passed &= (args.args_count == 2); 312 passed &= (args.args[0] == (i + 1)); 313 passed &= (args.args[1] == 0); 314 break; 315 case 2: 316 passed &= (rc == -ENOENT); 317 break; 318 case 3: 319 passed &= !rc; 320 passed &= (args.args_count == 3); 321 passed &= (args.args[0] == (i + 1)); 322 passed &= (args.args[1] == 4); 323 passed &= (args.args[2] == 3); 324 break; 325 case 4: 326 passed &= !rc; 327 passed &= (args.args_count == 2); 328 passed &= (args.args[0] == (i + 1)); 329 passed &= (args.args[1] == 100); 330 break; 331 case 5: 332 passed &= !rc; 333 passed &= (args.args_count == 0); 334 break; 335 case 6: 336 passed &= !rc; 337 passed &= (args.args_count == 1); 338 passed &= (args.args[0] == (i + 1)); 339 break; 340 case 7: 341 passed &= (rc == -ENOENT); 342 break; 343 default: 344 passed = false; 345 } 346 347 unittest(passed, "index %i - data error on node %s rc=%i\n", 348 i, args.np->full_name, rc); 349 } 350 351 /* Check for missing list property */ 352 rc = of_parse_phandle_with_args(np, "phandle-list-missing", 353 "#phandle-cells", 0, &args); 354 unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc); 355 rc = of_count_phandle_with_args(np, "phandle-list-missing", 356 "#phandle-cells"); 357 unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc); 358 359 /* Check for missing cells property */ 360 rc = of_parse_phandle_with_args(np, "phandle-list", 361 "#phandle-cells-missing", 0, &args); 362 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 363 rc = of_count_phandle_with_args(np, "phandle-list", 364 "#phandle-cells-missing"); 365 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 366 367 /* Check for bad phandle in list */ 368 rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle", 369 "#phandle-cells", 0, &args); 370 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 371 rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle", 372 "#phandle-cells"); 373 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 374 375 /* Check for incorrectly formed argument list */ 376 rc = of_parse_phandle_with_args(np, "phandle-list-bad-args", 377 "#phandle-cells", 1, &args); 378 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 379 rc = of_count_phandle_with_args(np, "phandle-list-bad-args", 380 "#phandle-cells"); 381 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 382 } 383 384 static void __init of_unittest_property_string(void) 385 { 386 const char *strings[4]; 387 struct device_node *np; 388 int rc; 389 390 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); 391 if (!np) { 392 pr_err("No testcase data in device tree\n"); 393 return; 394 } 395 396 rc = of_property_match_string(np, "phandle-list-names", "first"); 397 unittest(rc == 0, "first expected:0 got:%i\n", rc); 398 rc = of_property_match_string(np, "phandle-list-names", "second"); 399 unittest(rc == 1, "second expected:1 got:%i\n", rc); 400 rc = of_property_match_string(np, "phandle-list-names", "third"); 401 unittest(rc == 2, "third expected:2 got:%i\n", rc); 402 rc = of_property_match_string(np, "phandle-list-names", "fourth"); 403 unittest(rc == -ENODATA, "unmatched string; rc=%i\n", rc); 404 rc = of_property_match_string(np, "missing-property", "blah"); 405 unittest(rc == -EINVAL, "missing property; rc=%i\n", rc); 406 rc = of_property_match_string(np, "empty-property", "blah"); 407 unittest(rc == -ENODATA, "empty property; rc=%i\n", rc); 408 rc = of_property_match_string(np, "unterminated-string", "blah"); 409 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc); 410 411 /* of_property_count_strings() tests */ 412 rc = of_property_count_strings(np, "string-property"); 413 unittest(rc == 1, "Incorrect string count; rc=%i\n", rc); 414 rc = of_property_count_strings(np, "phandle-list-names"); 415 unittest(rc == 3, "Incorrect string count; rc=%i\n", rc); 416 rc = of_property_count_strings(np, "unterminated-string"); 417 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc); 418 rc = of_property_count_strings(np, "unterminated-string-list"); 419 unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc); 420 421 /* of_property_read_string_index() tests */ 422 rc = of_property_read_string_index(np, "string-property", 0, strings); 423 unittest(rc == 0 && !strcmp(strings[0], "foobar"), "of_property_read_string_index() failure; rc=%i\n", rc); 424 strings[0] = NULL; 425 rc = of_property_read_string_index(np, "string-property", 1, strings); 426 unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc); 427 rc = of_property_read_string_index(np, "phandle-list-names", 0, strings); 428 unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc); 429 rc = of_property_read_string_index(np, "phandle-list-names", 1, strings); 430 unittest(rc == 0 && !strcmp(strings[0], "second"), "of_property_read_string_index() failure; rc=%i\n", rc); 431 rc = of_property_read_string_index(np, "phandle-list-names", 2, strings); 432 unittest(rc == 0 && !strcmp(strings[0], "third"), "of_property_read_string_index() failure; rc=%i\n", rc); 433 strings[0] = NULL; 434 rc = of_property_read_string_index(np, "phandle-list-names", 3, strings); 435 unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc); 436 strings[0] = NULL; 437 rc = of_property_read_string_index(np, "unterminated-string", 0, strings); 438 unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc); 439 rc = of_property_read_string_index(np, "unterminated-string-list", 0, strings); 440 unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc); 441 strings[0] = NULL; 442 rc = of_property_read_string_index(np, "unterminated-string-list", 2, strings); /* should fail */ 443 unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc); 444 strings[1] = NULL; 445 446 /* of_property_read_string_array() tests */ 447 rc = of_property_read_string_array(np, "string-property", strings, 4); 448 unittest(rc == 1, "Incorrect string count; rc=%i\n", rc); 449 rc = of_property_read_string_array(np, "phandle-list-names", strings, 4); 450 unittest(rc == 3, "Incorrect string count; rc=%i\n", rc); 451 rc = of_property_read_string_array(np, "unterminated-string", strings, 4); 452 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc); 453 /* -- An incorrectly formed string should cause a failure */ 454 rc = of_property_read_string_array(np, "unterminated-string-list", strings, 4); 455 unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc); 456 /* -- parsing the correctly formed strings should still work: */ 457 strings[2] = NULL; 458 rc = of_property_read_string_array(np, "unterminated-string-list", strings, 2); 459 unittest(rc == 2 && strings[2] == NULL, "of_property_read_string_array() failure; rc=%i\n", rc); 460 strings[1] = NULL; 461 rc = of_property_read_string_array(np, "phandle-list-names", strings, 1); 462 unittest(rc == 1 && strings[1] == NULL, "Overwrote end of string array; rc=%i, str='%s'\n", rc, strings[1]); 463 } 464 465 #define propcmp(p1, p2) (((p1)->length == (p2)->length) && \ 466 (p1)->value && (p2)->value && \ 467 !memcmp((p1)->value, (p2)->value, (p1)->length) && \ 468 !strcmp((p1)->name, (p2)->name)) 469 static void __init of_unittest_property_copy(void) 470 { 471 #ifdef CONFIG_OF_DYNAMIC 472 struct property p1 = { .name = "p1", .length = 0, .value = "" }; 473 struct property p2 = { .name = "p2", .length = 5, .value = "abcd" }; 474 struct property *new; 475 476 new = __of_prop_dup(&p1, GFP_KERNEL); 477 unittest(new && propcmp(&p1, new), "empty property didn't copy correctly\n"); 478 kfree(new->value); 479 kfree(new->name); 480 kfree(new); 481 482 new = __of_prop_dup(&p2, GFP_KERNEL); 483 unittest(new && propcmp(&p2, new), "non-empty property didn't copy correctly\n"); 484 kfree(new->value); 485 kfree(new->name); 486 kfree(new); 487 #endif 488 } 489 490 static void __init of_unittest_changeset(void) 491 { 492 #ifdef CONFIG_OF_DYNAMIC 493 struct property *ppadd, padd = { .name = "prop-add", .length = 0, .value = "" }; 494 struct property *ppupdate, pupdate = { .name = "prop-update", .length = 5, .value = "abcd" }; 495 struct property *ppremove; 496 struct device_node *n1, *n2, *n21, *nremove, *parent, *np; 497 struct of_changeset chgset; 498 499 n1 = __of_node_dup(NULL, "/testcase-data/changeset/n1"); 500 unittest(n1, "testcase setup failure\n"); 501 n2 = __of_node_dup(NULL, "/testcase-data/changeset/n2"); 502 unittest(n2, "testcase setup failure\n"); 503 n21 = __of_node_dup(NULL, "%s/%s", "/testcase-data/changeset/n2", "n21"); 504 unittest(n21, "testcase setup failure %p\n", n21); 505 nremove = of_find_node_by_path("/testcase-data/changeset/node-remove"); 506 unittest(nremove, "testcase setup failure\n"); 507 ppadd = __of_prop_dup(&padd, GFP_KERNEL); 508 unittest(ppadd, "testcase setup failure\n"); 509 ppupdate = __of_prop_dup(&pupdate, GFP_KERNEL); 510 unittest(ppupdate, "testcase setup failure\n"); 511 parent = nremove->parent; 512 n1->parent = parent; 513 n2->parent = parent; 514 n21->parent = n2; 515 n2->child = n21; 516 ppremove = of_find_property(parent, "prop-remove", NULL); 517 unittest(ppremove, "failed to find removal prop"); 518 519 of_changeset_init(&chgset); 520 unittest(!of_changeset_attach_node(&chgset, n1), "fail attach n1\n"); 521 unittest(!of_changeset_attach_node(&chgset, n2), "fail attach n2\n"); 522 unittest(!of_changeset_detach_node(&chgset, nremove), "fail remove node\n"); 523 unittest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n"); 524 unittest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop\n"); 525 unittest(!of_changeset_update_property(&chgset, parent, ppupdate), "fail update prop\n"); 526 unittest(!of_changeset_remove_property(&chgset, parent, ppremove), "fail remove prop\n"); 527 mutex_lock(&of_mutex); 528 unittest(!of_changeset_apply(&chgset), "apply failed\n"); 529 mutex_unlock(&of_mutex); 530 531 /* Make sure node names are constructed correctly */ 532 unittest((np = of_find_node_by_path("/testcase-data/changeset/n2/n21")), 533 "'%s' not added\n", n21->full_name); 534 of_node_put(np); 535 536 mutex_lock(&of_mutex); 537 unittest(!of_changeset_revert(&chgset), "revert failed\n"); 538 mutex_unlock(&of_mutex); 539 540 of_changeset_destroy(&chgset); 541 #endif 542 } 543 544 static void __init of_unittest_parse_interrupts(void) 545 { 546 struct device_node *np; 547 struct of_phandle_args args; 548 int i, rc; 549 550 np = of_find_node_by_path("/testcase-data/interrupts/interrupts0"); 551 if (!np) { 552 pr_err("missing testcase data\n"); 553 return; 554 } 555 556 for (i = 0; i < 4; i++) { 557 bool passed = true; 558 559 args.args_count = 0; 560 rc = of_irq_parse_one(np, i, &args); 561 562 passed &= !rc; 563 passed &= (args.args_count == 1); 564 passed &= (args.args[0] == (i + 1)); 565 566 unittest(passed, "index %i - data error on node %s rc=%i\n", 567 i, args.np->full_name, rc); 568 } 569 of_node_put(np); 570 571 np = of_find_node_by_path("/testcase-data/interrupts/interrupts1"); 572 if (!np) { 573 pr_err("missing testcase data\n"); 574 return; 575 } 576 577 for (i = 0; i < 4; i++) { 578 bool passed = true; 579 580 args.args_count = 0; 581 rc = of_irq_parse_one(np, i, &args); 582 583 /* Test the values from tests-phandle.dtsi */ 584 switch (i) { 585 case 0: 586 passed &= !rc; 587 passed &= (args.args_count == 1); 588 passed &= (args.args[0] == 9); 589 break; 590 case 1: 591 passed &= !rc; 592 passed &= (args.args_count == 3); 593 passed &= (args.args[0] == 10); 594 passed &= (args.args[1] == 11); 595 passed &= (args.args[2] == 12); 596 break; 597 case 2: 598 passed &= !rc; 599 passed &= (args.args_count == 2); 600 passed &= (args.args[0] == 13); 601 passed &= (args.args[1] == 14); 602 break; 603 case 3: 604 passed &= !rc; 605 passed &= (args.args_count == 2); 606 passed &= (args.args[0] == 15); 607 passed &= (args.args[1] == 16); 608 break; 609 default: 610 passed = false; 611 } 612 unittest(passed, "index %i - data error on node %s rc=%i\n", 613 i, args.np->full_name, rc); 614 } 615 of_node_put(np); 616 } 617 618 static void __init of_unittest_parse_interrupts_extended(void) 619 { 620 struct device_node *np; 621 struct of_phandle_args args; 622 int i, rc; 623 624 np = of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0"); 625 if (!np) { 626 pr_err("missing testcase data\n"); 627 return; 628 } 629 630 for (i = 0; i < 7; i++) { 631 bool passed = true; 632 633 rc = of_irq_parse_one(np, i, &args); 634 635 /* Test the values from tests-phandle.dtsi */ 636 switch (i) { 637 case 0: 638 passed &= !rc; 639 passed &= (args.args_count == 1); 640 passed &= (args.args[0] == 1); 641 break; 642 case 1: 643 passed &= !rc; 644 passed &= (args.args_count == 3); 645 passed &= (args.args[0] == 2); 646 passed &= (args.args[1] == 3); 647 passed &= (args.args[2] == 4); 648 break; 649 case 2: 650 passed &= !rc; 651 passed &= (args.args_count == 2); 652 passed &= (args.args[0] == 5); 653 passed &= (args.args[1] == 6); 654 break; 655 case 3: 656 passed &= !rc; 657 passed &= (args.args_count == 1); 658 passed &= (args.args[0] == 9); 659 break; 660 case 4: 661 passed &= !rc; 662 passed &= (args.args_count == 3); 663 passed &= (args.args[0] == 10); 664 passed &= (args.args[1] == 11); 665 passed &= (args.args[2] == 12); 666 break; 667 case 5: 668 passed &= !rc; 669 passed &= (args.args_count == 2); 670 passed &= (args.args[0] == 13); 671 passed &= (args.args[1] == 14); 672 break; 673 case 6: 674 passed &= !rc; 675 passed &= (args.args_count == 1); 676 passed &= (args.args[0] == 15); 677 break; 678 default: 679 passed = false; 680 } 681 682 unittest(passed, "index %i - data error on node %s rc=%i\n", 683 i, args.np->full_name, rc); 684 } 685 of_node_put(np); 686 } 687 688 static const struct of_device_id match_node_table[] = { 689 { .data = "A", .name = "name0", }, /* Name alone is lowest priority */ 690 { .data = "B", .type = "type1", }, /* followed by type alone */ 691 692 { .data = "Ca", .name = "name2", .type = "type1", }, /* followed by both together */ 693 { .data = "Cb", .name = "name2", }, /* Only match when type doesn't match */ 694 { .data = "Cc", .name = "name2", .type = "type2", }, 695 696 { .data = "E", .compatible = "compat3" }, 697 { .data = "G", .compatible = "compat2", }, 698 { .data = "H", .compatible = "compat2", .name = "name5", }, 699 { .data = "I", .compatible = "compat2", .type = "type1", }, 700 { .data = "J", .compatible = "compat2", .type = "type1", .name = "name8", }, 701 { .data = "K", .compatible = "compat2", .name = "name9", }, 702 {} 703 }; 704 705 static struct { 706 const char *path; 707 const char *data; 708 } match_node_tests[] = { 709 { .path = "/testcase-data/match-node/name0", .data = "A", }, 710 { .path = "/testcase-data/match-node/name1", .data = "B", }, 711 { .path = "/testcase-data/match-node/a/name2", .data = "Ca", }, 712 { .path = "/testcase-data/match-node/b/name2", .data = "Cb", }, 713 { .path = "/testcase-data/match-node/c/name2", .data = "Cc", }, 714 { .path = "/testcase-data/match-node/name3", .data = "E", }, 715 { .path = "/testcase-data/match-node/name4", .data = "G", }, 716 { .path = "/testcase-data/match-node/name5", .data = "H", }, 717 { .path = "/testcase-data/match-node/name6", .data = "G", }, 718 { .path = "/testcase-data/match-node/name7", .data = "I", }, 719 { .path = "/testcase-data/match-node/name8", .data = "J", }, 720 { .path = "/testcase-data/match-node/name9", .data = "K", }, 721 }; 722 723 static void __init of_unittest_match_node(void) 724 { 725 struct device_node *np; 726 const struct of_device_id *match; 727 int i; 728 729 for (i = 0; i < ARRAY_SIZE(match_node_tests); i++) { 730 np = of_find_node_by_path(match_node_tests[i].path); 731 if (!np) { 732 unittest(0, "missing testcase node %s\n", 733 match_node_tests[i].path); 734 continue; 735 } 736 737 match = of_match_node(match_node_table, np); 738 if (!match) { 739 unittest(0, "%s didn't match anything\n", 740 match_node_tests[i].path); 741 continue; 742 } 743 744 if (strcmp(match->data, match_node_tests[i].data) != 0) { 745 unittest(0, "%s got wrong match. expected %s, got %s\n", 746 match_node_tests[i].path, match_node_tests[i].data, 747 (const char *)match->data); 748 continue; 749 } 750 unittest(1, "passed"); 751 } 752 } 753 754 static const struct platform_device_info test_bus_info = { 755 .name = "unittest-bus", 756 }; 757 static void __init of_unittest_platform_populate(void) 758 { 759 int irq, rc; 760 struct device_node *np, *child, *grandchild; 761 struct platform_device *pdev, *test_bus; 762 const struct of_device_id match[] = { 763 { .compatible = "test-device", }, 764 {} 765 }; 766 767 np = of_find_node_by_path("/testcase-data"); 768 of_platform_populate(np, of_default_bus_match_table, NULL, NULL); 769 770 /* Test that a missing irq domain returns -EPROBE_DEFER */ 771 np = of_find_node_by_path("/testcase-data/testcase-device1"); 772 pdev = of_find_device_by_node(np); 773 unittest(pdev, "device 1 creation failed\n"); 774 775 irq = platform_get_irq(pdev, 0); 776 unittest(irq == -EPROBE_DEFER, "device deferred probe failed - %d\n", irq); 777 778 /* Test that a parsing failure does not return -EPROBE_DEFER */ 779 np = of_find_node_by_path("/testcase-data/testcase-device2"); 780 pdev = of_find_device_by_node(np); 781 unittest(pdev, "device 2 creation failed\n"); 782 irq = platform_get_irq(pdev, 0); 783 unittest(irq < 0 && irq != -EPROBE_DEFER, "device parsing error failed - %d\n", irq); 784 785 np = of_find_node_by_path("/testcase-data/platform-tests"); 786 unittest(np, "No testcase data in device tree\n"); 787 if (!np) 788 return; 789 790 test_bus = platform_device_register_full(&test_bus_info); 791 rc = PTR_ERR_OR_ZERO(test_bus); 792 unittest(!rc, "testbus registration failed; rc=%i\n", rc); 793 if (rc) 794 return; 795 test_bus->dev.of_node = np; 796 797 of_platform_populate(np, match, NULL, &test_bus->dev); 798 for_each_child_of_node(np, child) { 799 for_each_child_of_node(child, grandchild) 800 unittest(of_find_device_by_node(grandchild), 801 "Could not create device for node '%s'\n", 802 grandchild->name); 803 } 804 805 of_platform_depopulate(&test_bus->dev); 806 for_each_child_of_node(np, child) { 807 for_each_child_of_node(child, grandchild) 808 unittest(!of_find_device_by_node(grandchild), 809 "device didn't get destroyed '%s'\n", 810 grandchild->name); 811 } 812 813 platform_device_unregister(test_bus); 814 of_node_put(np); 815 } 816 817 /** 818 * update_node_properties - adds the properties 819 * of np into dup node (present in live tree) and 820 * updates parent of children of np to dup. 821 * 822 * @np: node already present in live tree 823 * @dup: node present in live tree to be updated 824 */ 825 static void update_node_properties(struct device_node *np, 826 struct device_node *dup) 827 { 828 struct property *prop; 829 struct device_node *child; 830 831 for_each_property_of_node(np, prop) 832 of_add_property(dup, prop); 833 834 for_each_child_of_node(np, child) 835 child->parent = dup; 836 } 837 838 /** 839 * attach_node_and_children - attaches nodes 840 * and its children to live tree 841 * 842 * @np: Node to attach to live tree 843 */ 844 static int attach_node_and_children(struct device_node *np) 845 { 846 struct device_node *next, *dup, *child; 847 unsigned long flags; 848 849 dup = of_find_node_by_path(np->full_name); 850 if (dup) { 851 update_node_properties(np, dup); 852 return 0; 853 } 854 855 child = np->child; 856 np->child = NULL; 857 858 mutex_lock(&of_mutex); 859 raw_spin_lock_irqsave(&devtree_lock, flags); 860 np->sibling = np->parent->child; 861 np->parent->child = np; 862 of_node_clear_flag(np, OF_DETACHED); 863 raw_spin_unlock_irqrestore(&devtree_lock, flags); 864 865 __of_attach_node_sysfs(np); 866 mutex_unlock(&of_mutex); 867 868 while (child) { 869 next = child->sibling; 870 attach_node_and_children(child); 871 child = next; 872 } 873 874 return 0; 875 } 876 877 /** 878 * unittest_data_add - Reads, copies data from 879 * linked tree and attaches it to the live tree 880 */ 881 static int __init unittest_data_add(void) 882 { 883 void *unittest_data; 884 struct device_node *unittest_data_node, *np; 885 /* 886 * __dtb_testcases_begin[] and __dtb_testcases_end[] are magically 887 * created by cmd_dt_S_dtb in scripts/Makefile.lib 888 */ 889 extern uint8_t __dtb_testcases_begin[]; 890 extern uint8_t __dtb_testcases_end[]; 891 const int size = __dtb_testcases_end - __dtb_testcases_begin; 892 int rc; 893 894 if (!size) { 895 pr_warn("%s: No testcase data to attach; not running tests\n", 896 __func__); 897 return -ENODATA; 898 } 899 900 /* creating copy */ 901 unittest_data = kmemdup(__dtb_testcases_begin, size, GFP_KERNEL); 902 903 if (!unittest_data) { 904 pr_warn("%s: Failed to allocate memory for unittest_data; " 905 "not running tests\n", __func__); 906 return -ENOMEM; 907 } 908 of_fdt_unflatten_tree(unittest_data, &unittest_data_node); 909 if (!unittest_data_node) { 910 pr_warn("%s: No tree to attach; not running tests\n", __func__); 911 return -ENODATA; 912 } 913 of_node_set_flag(unittest_data_node, OF_DETACHED); 914 rc = of_resolve_phandles(unittest_data_node); 915 if (rc) { 916 pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__, rc); 917 return -EINVAL; 918 } 919 920 if (!of_root) { 921 of_root = unittest_data_node; 922 for_each_of_allnodes(np) 923 __of_attach_node_sysfs(np); 924 of_aliases = of_find_node_by_path("/aliases"); 925 of_chosen = of_find_node_by_path("/chosen"); 926 return 0; 927 } 928 929 /* attach the sub-tree to live tree */ 930 np = unittest_data_node->child; 931 while (np) { 932 struct device_node *next = np->sibling; 933 934 np->parent = of_root; 935 attach_node_and_children(np); 936 np = next; 937 } 938 return 0; 939 } 940 941 #ifdef CONFIG_OF_OVERLAY 942 943 static int unittest_probe(struct platform_device *pdev) 944 { 945 struct device *dev = &pdev->dev; 946 struct device_node *np = dev->of_node; 947 948 if (np == NULL) { 949 dev_err(dev, "No OF data for device\n"); 950 return -EINVAL; 951 952 } 953 954 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name); 955 956 of_platform_populate(np, NULL, NULL, &pdev->dev); 957 958 return 0; 959 } 960 961 static int unittest_remove(struct platform_device *pdev) 962 { 963 struct device *dev = &pdev->dev; 964 struct device_node *np = dev->of_node; 965 966 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name); 967 return 0; 968 } 969 970 static const struct of_device_id unittest_match[] = { 971 { .compatible = "unittest", }, 972 {}, 973 }; 974 975 static struct platform_driver unittest_driver = { 976 .probe = unittest_probe, 977 .remove = unittest_remove, 978 .driver = { 979 .name = "unittest", 980 .owner = THIS_MODULE, 981 .of_match_table = of_match_ptr(unittest_match), 982 }, 983 }; 984 985 /* get the platform device instantiated at the path */ 986 static struct platform_device *of_path_to_platform_device(const char *path) 987 { 988 struct device_node *np; 989 struct platform_device *pdev; 990 991 np = of_find_node_by_path(path); 992 if (np == NULL) 993 return NULL; 994 995 pdev = of_find_device_by_node(np); 996 of_node_put(np); 997 998 return pdev; 999 } 1000 1001 /* find out if a platform device exists at that path */ 1002 static int of_path_platform_device_exists(const char *path) 1003 { 1004 struct platform_device *pdev; 1005 1006 pdev = of_path_to_platform_device(path); 1007 platform_device_put(pdev); 1008 return pdev != NULL; 1009 } 1010 1011 #if IS_BUILTIN(CONFIG_I2C) 1012 1013 /* get the i2c client device instantiated at the path */ 1014 static struct i2c_client *of_path_to_i2c_client(const char *path) 1015 { 1016 struct device_node *np; 1017 struct i2c_client *client; 1018 1019 np = of_find_node_by_path(path); 1020 if (np == NULL) 1021 return NULL; 1022 1023 client = of_find_i2c_device_by_node(np); 1024 of_node_put(np); 1025 1026 return client; 1027 } 1028 1029 /* find out if a i2c client device exists at that path */ 1030 static int of_path_i2c_client_exists(const char *path) 1031 { 1032 struct i2c_client *client; 1033 1034 client = of_path_to_i2c_client(path); 1035 if (client) 1036 put_device(&client->dev); 1037 return client != NULL; 1038 } 1039 #else 1040 static int of_path_i2c_client_exists(const char *path) 1041 { 1042 return 0; 1043 } 1044 #endif 1045 1046 enum overlay_type { 1047 PDEV_OVERLAY, 1048 I2C_OVERLAY 1049 }; 1050 1051 static int of_path_device_type_exists(const char *path, 1052 enum overlay_type ovtype) 1053 { 1054 switch (ovtype) { 1055 case PDEV_OVERLAY: 1056 return of_path_platform_device_exists(path); 1057 case I2C_OVERLAY: 1058 return of_path_i2c_client_exists(path); 1059 } 1060 return 0; 1061 } 1062 1063 static const char *unittest_path(int nr, enum overlay_type ovtype) 1064 { 1065 const char *base; 1066 static char buf[256]; 1067 1068 switch (ovtype) { 1069 case PDEV_OVERLAY: 1070 base = "/testcase-data/overlay-node/test-bus"; 1071 break; 1072 case I2C_OVERLAY: 1073 base = "/testcase-data/overlay-node/test-bus/i2c-test-bus"; 1074 break; 1075 default: 1076 buf[0] = '\0'; 1077 return buf; 1078 } 1079 snprintf(buf, sizeof(buf) - 1, "%s/test-unittest%d", base, nr); 1080 buf[sizeof(buf) - 1] = '\0'; 1081 return buf; 1082 } 1083 1084 static int of_unittest_device_exists(int unittest_nr, enum overlay_type ovtype) 1085 { 1086 const char *path; 1087 1088 path = unittest_path(unittest_nr, ovtype); 1089 1090 switch (ovtype) { 1091 case PDEV_OVERLAY: 1092 return of_path_platform_device_exists(path); 1093 case I2C_OVERLAY: 1094 return of_path_i2c_client_exists(path); 1095 } 1096 return 0; 1097 } 1098 1099 static const char *overlay_path(int nr) 1100 { 1101 static char buf[256]; 1102 1103 snprintf(buf, sizeof(buf) - 1, 1104 "/testcase-data/overlay%d", nr); 1105 buf[sizeof(buf) - 1] = '\0'; 1106 1107 return buf; 1108 } 1109 1110 static const char *bus_path = "/testcase-data/overlay-node/test-bus"; 1111 1112 static int of_unittest_apply_overlay(int unittest_nr, int overlay_nr, 1113 int *overlay_id) 1114 { 1115 struct device_node *np = NULL; 1116 int ret, id = -1; 1117 1118 np = of_find_node_by_path(overlay_path(overlay_nr)); 1119 if (np == NULL) { 1120 unittest(0, "could not find overlay node @\"%s\"\n", 1121 overlay_path(overlay_nr)); 1122 ret = -EINVAL; 1123 goto out; 1124 } 1125 1126 ret = of_overlay_create(np); 1127 if (ret < 0) { 1128 unittest(0, "could not create overlay from \"%s\"\n", 1129 overlay_path(overlay_nr)); 1130 goto out; 1131 } 1132 id = ret; 1133 1134 ret = 0; 1135 1136 out: 1137 of_node_put(np); 1138 1139 if (overlay_id) 1140 *overlay_id = id; 1141 1142 return ret; 1143 } 1144 1145 /* apply an overlay while checking before and after states */ 1146 static int of_unittest_apply_overlay_check(int overlay_nr, int unittest_nr, 1147 int before, int after, enum overlay_type ovtype) 1148 { 1149 int ret; 1150 1151 /* unittest device must not be in before state */ 1152 if (of_unittest_device_exists(unittest_nr, ovtype) != before) { 1153 unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n", 1154 overlay_path(overlay_nr), 1155 unittest_path(unittest_nr, ovtype), 1156 !before ? "enabled" : "disabled"); 1157 return -EINVAL; 1158 } 1159 1160 ret = of_unittest_apply_overlay(overlay_nr, unittest_nr, NULL); 1161 if (ret != 0) { 1162 /* of_unittest_apply_overlay already called unittest() */ 1163 return ret; 1164 } 1165 1166 /* unittest device must be to set to after state */ 1167 if (of_unittest_device_exists(unittest_nr, ovtype) != after) { 1168 unittest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n", 1169 overlay_path(overlay_nr), 1170 unittest_path(unittest_nr, ovtype), 1171 !after ? "enabled" : "disabled"); 1172 return -EINVAL; 1173 } 1174 1175 return 0; 1176 } 1177 1178 /* apply an overlay and then revert it while checking before, after states */ 1179 static int of_unittest_apply_revert_overlay_check(int overlay_nr, 1180 int unittest_nr, int before, int after, 1181 enum overlay_type ovtype) 1182 { 1183 int ret, ov_id; 1184 1185 /* unittest device must be in before state */ 1186 if (of_unittest_device_exists(unittest_nr, ovtype) != before) { 1187 unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n", 1188 overlay_path(overlay_nr), 1189 unittest_path(unittest_nr, ovtype), 1190 !before ? "enabled" : "disabled"); 1191 return -EINVAL; 1192 } 1193 1194 /* apply the overlay */ 1195 ret = of_unittest_apply_overlay(overlay_nr, unittest_nr, &ov_id); 1196 if (ret != 0) { 1197 /* of_unittest_apply_overlay already called unittest() */ 1198 return ret; 1199 } 1200 1201 /* unittest device must be in after state */ 1202 if (of_unittest_device_exists(unittest_nr, ovtype) != after) { 1203 unittest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n", 1204 overlay_path(overlay_nr), 1205 unittest_path(unittest_nr, ovtype), 1206 !after ? "enabled" : "disabled"); 1207 return -EINVAL; 1208 } 1209 1210 ret = of_overlay_destroy(ov_id); 1211 if (ret != 0) { 1212 unittest(0, "overlay @\"%s\" failed to be destroyed @\"%s\"\n", 1213 overlay_path(overlay_nr), 1214 unittest_path(unittest_nr, ovtype)); 1215 return ret; 1216 } 1217 1218 /* unittest device must be again in before state */ 1219 if (of_unittest_device_exists(unittest_nr, PDEV_OVERLAY) != before) { 1220 unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n", 1221 overlay_path(overlay_nr), 1222 unittest_path(unittest_nr, ovtype), 1223 !before ? "enabled" : "disabled"); 1224 return -EINVAL; 1225 } 1226 1227 return 0; 1228 } 1229 1230 /* test activation of device */ 1231 static void of_unittest_overlay_0(void) 1232 { 1233 int ret; 1234 1235 /* device should enable */ 1236 ret = of_unittest_apply_overlay_check(0, 0, 0, 1, PDEV_OVERLAY); 1237 if (ret != 0) 1238 return; 1239 1240 unittest(1, "overlay test %d passed\n", 0); 1241 } 1242 1243 /* test deactivation of device */ 1244 static void of_unittest_overlay_1(void) 1245 { 1246 int ret; 1247 1248 /* device should disable */ 1249 ret = of_unittest_apply_overlay_check(1, 1, 1, 0, PDEV_OVERLAY); 1250 if (ret != 0) 1251 return; 1252 1253 unittest(1, "overlay test %d passed\n", 1); 1254 } 1255 1256 /* test activation of device */ 1257 static void of_unittest_overlay_2(void) 1258 { 1259 int ret; 1260 1261 /* device should enable */ 1262 ret = of_unittest_apply_overlay_check(2, 2, 0, 1, PDEV_OVERLAY); 1263 if (ret != 0) 1264 return; 1265 1266 unittest(1, "overlay test %d passed\n", 2); 1267 } 1268 1269 /* test deactivation of device */ 1270 static void of_unittest_overlay_3(void) 1271 { 1272 int ret; 1273 1274 /* device should disable */ 1275 ret = of_unittest_apply_overlay_check(3, 3, 1, 0, PDEV_OVERLAY); 1276 if (ret != 0) 1277 return; 1278 1279 unittest(1, "overlay test %d passed\n", 3); 1280 } 1281 1282 /* test activation of a full device node */ 1283 static void of_unittest_overlay_4(void) 1284 { 1285 int ret; 1286 1287 /* device should disable */ 1288 ret = of_unittest_apply_overlay_check(4, 4, 0, 1, PDEV_OVERLAY); 1289 if (ret != 0) 1290 return; 1291 1292 unittest(1, "overlay test %d passed\n", 4); 1293 } 1294 1295 /* test overlay apply/revert sequence */ 1296 static void of_unittest_overlay_5(void) 1297 { 1298 int ret; 1299 1300 /* device should disable */ 1301 ret = of_unittest_apply_revert_overlay_check(5, 5, 0, 1, PDEV_OVERLAY); 1302 if (ret != 0) 1303 return; 1304 1305 unittest(1, "overlay test %d passed\n", 5); 1306 } 1307 1308 /* test overlay application in sequence */ 1309 static void of_unittest_overlay_6(void) 1310 { 1311 struct device_node *np; 1312 int ret, i, ov_id[2]; 1313 int overlay_nr = 6, unittest_nr = 6; 1314 int before = 0, after = 1; 1315 1316 /* unittest device must be in before state */ 1317 for (i = 0; i < 2; i++) { 1318 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY) 1319 != before) { 1320 unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n", 1321 overlay_path(overlay_nr + i), 1322 unittest_path(unittest_nr + i, 1323 PDEV_OVERLAY), 1324 !before ? "enabled" : "disabled"); 1325 return; 1326 } 1327 } 1328 1329 /* apply the overlays */ 1330 for (i = 0; i < 2; i++) { 1331 1332 np = of_find_node_by_path(overlay_path(overlay_nr + i)); 1333 if (np == NULL) { 1334 unittest(0, "could not find overlay node @\"%s\"\n", 1335 overlay_path(overlay_nr + i)); 1336 return; 1337 } 1338 1339 ret = of_overlay_create(np); 1340 if (ret < 0) { 1341 unittest(0, "could not create overlay from \"%s\"\n", 1342 overlay_path(overlay_nr + i)); 1343 return; 1344 } 1345 ov_id[i] = ret; 1346 } 1347 1348 for (i = 0; i < 2; i++) { 1349 /* unittest device must be in after state */ 1350 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY) 1351 != after) { 1352 unittest(0, "overlay @\"%s\" failed @\"%s\" %s\n", 1353 overlay_path(overlay_nr + i), 1354 unittest_path(unittest_nr + i, 1355 PDEV_OVERLAY), 1356 !after ? "enabled" : "disabled"); 1357 return; 1358 } 1359 } 1360 1361 for (i = 1; i >= 0; i--) { 1362 ret = of_overlay_destroy(ov_id[i]); 1363 if (ret != 0) { 1364 unittest(0, "overlay @\"%s\" failed destroy @\"%s\"\n", 1365 overlay_path(overlay_nr + i), 1366 unittest_path(unittest_nr + i, 1367 PDEV_OVERLAY)); 1368 return; 1369 } 1370 } 1371 1372 for (i = 0; i < 2; i++) { 1373 /* unittest device must be again in before state */ 1374 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY) 1375 != before) { 1376 unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n", 1377 overlay_path(overlay_nr + i), 1378 unittest_path(unittest_nr + i, 1379 PDEV_OVERLAY), 1380 !before ? "enabled" : "disabled"); 1381 return; 1382 } 1383 } 1384 1385 unittest(1, "overlay test %d passed\n", 6); 1386 } 1387 1388 /* test overlay application in sequence */ 1389 static void of_unittest_overlay_8(void) 1390 { 1391 struct device_node *np; 1392 int ret, i, ov_id[2]; 1393 int overlay_nr = 8, unittest_nr = 8; 1394 1395 /* we don't care about device state in this test */ 1396 1397 /* apply the overlays */ 1398 for (i = 0; i < 2; i++) { 1399 1400 np = of_find_node_by_path(overlay_path(overlay_nr + i)); 1401 if (np == NULL) { 1402 unittest(0, "could not find overlay node @\"%s\"\n", 1403 overlay_path(overlay_nr + i)); 1404 return; 1405 } 1406 1407 ret = of_overlay_create(np); 1408 if (ret < 0) { 1409 unittest(0, "could not create overlay from \"%s\"\n", 1410 overlay_path(overlay_nr + i)); 1411 return; 1412 } 1413 ov_id[i] = ret; 1414 } 1415 1416 /* now try to remove first overlay (it should fail) */ 1417 ret = of_overlay_destroy(ov_id[0]); 1418 if (ret == 0) { 1419 unittest(0, "overlay @\"%s\" was destroyed @\"%s\"\n", 1420 overlay_path(overlay_nr + 0), 1421 unittest_path(unittest_nr, 1422 PDEV_OVERLAY)); 1423 return; 1424 } 1425 1426 /* removing them in order should work */ 1427 for (i = 1; i >= 0; i--) { 1428 ret = of_overlay_destroy(ov_id[i]); 1429 if (ret != 0) { 1430 unittest(0, "overlay @\"%s\" not destroyed @\"%s\"\n", 1431 overlay_path(overlay_nr + i), 1432 unittest_path(unittest_nr, 1433 PDEV_OVERLAY)); 1434 return; 1435 } 1436 } 1437 1438 unittest(1, "overlay test %d passed\n", 8); 1439 } 1440 1441 /* test insertion of a bus with parent devices */ 1442 static void of_unittest_overlay_10(void) 1443 { 1444 int ret; 1445 char *child_path; 1446 1447 /* device should disable */ 1448 ret = of_unittest_apply_overlay_check(10, 10, 0, 1, PDEV_OVERLAY); 1449 if (unittest(ret == 0, 1450 "overlay test %d failed; overlay application\n", 10)) 1451 return; 1452 1453 child_path = kasprintf(GFP_KERNEL, "%s/test-unittest101", 1454 unittest_path(10, PDEV_OVERLAY)); 1455 if (unittest(child_path, "overlay test %d failed; kasprintf\n", 10)) 1456 return; 1457 1458 ret = of_path_device_type_exists(child_path, PDEV_OVERLAY); 1459 kfree(child_path); 1460 if (unittest(ret, "overlay test %d failed; no child device\n", 10)) 1461 return; 1462 } 1463 1464 /* test insertion of a bus with parent devices (and revert) */ 1465 static void of_unittest_overlay_11(void) 1466 { 1467 int ret; 1468 1469 /* device should disable */ 1470 ret = of_unittest_apply_revert_overlay_check(11, 11, 0, 1, 1471 PDEV_OVERLAY); 1472 if (unittest(ret == 0, 1473 "overlay test %d failed; overlay application\n", 11)) 1474 return; 1475 } 1476 1477 #if IS_BUILTIN(CONFIG_I2C) && IS_ENABLED(CONFIG_OF_OVERLAY) 1478 1479 struct unittest_i2c_bus_data { 1480 struct platform_device *pdev; 1481 struct i2c_adapter adap; 1482 }; 1483 1484 static int unittest_i2c_master_xfer(struct i2c_adapter *adap, 1485 struct i2c_msg *msgs, int num) 1486 { 1487 struct unittest_i2c_bus_data *std = i2c_get_adapdata(adap); 1488 1489 (void)std; 1490 1491 return num; 1492 } 1493 1494 static u32 unittest_i2c_functionality(struct i2c_adapter *adap) 1495 { 1496 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; 1497 } 1498 1499 static const struct i2c_algorithm unittest_i2c_algo = { 1500 .master_xfer = unittest_i2c_master_xfer, 1501 .functionality = unittest_i2c_functionality, 1502 }; 1503 1504 static int unittest_i2c_bus_probe(struct platform_device *pdev) 1505 { 1506 struct device *dev = &pdev->dev; 1507 struct device_node *np = dev->of_node; 1508 struct unittest_i2c_bus_data *std; 1509 struct i2c_adapter *adap; 1510 int ret; 1511 1512 if (np == NULL) { 1513 dev_err(dev, "No OF data for device\n"); 1514 return -EINVAL; 1515 1516 } 1517 1518 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name); 1519 1520 std = devm_kzalloc(dev, sizeof(*std), GFP_KERNEL); 1521 if (!std) { 1522 dev_err(dev, "Failed to allocate unittest i2c data\n"); 1523 return -ENOMEM; 1524 } 1525 1526 /* link them together */ 1527 std->pdev = pdev; 1528 platform_set_drvdata(pdev, std); 1529 1530 adap = &std->adap; 1531 i2c_set_adapdata(adap, std); 1532 adap->nr = -1; 1533 strlcpy(adap->name, pdev->name, sizeof(adap->name)); 1534 adap->class = I2C_CLASS_DEPRECATED; 1535 adap->algo = &unittest_i2c_algo; 1536 adap->dev.parent = dev; 1537 adap->dev.of_node = dev->of_node; 1538 adap->timeout = 5 * HZ; 1539 adap->retries = 3; 1540 1541 ret = i2c_add_numbered_adapter(adap); 1542 if (ret != 0) { 1543 dev_err(dev, "Failed to add I2C adapter\n"); 1544 return ret; 1545 } 1546 1547 return 0; 1548 } 1549 1550 static int unittest_i2c_bus_remove(struct platform_device *pdev) 1551 { 1552 struct device *dev = &pdev->dev; 1553 struct device_node *np = dev->of_node; 1554 struct unittest_i2c_bus_data *std = platform_get_drvdata(pdev); 1555 1556 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name); 1557 i2c_del_adapter(&std->adap); 1558 1559 return 0; 1560 } 1561 1562 static const struct of_device_id unittest_i2c_bus_match[] = { 1563 { .compatible = "unittest-i2c-bus", }, 1564 {}, 1565 }; 1566 1567 static struct platform_driver unittest_i2c_bus_driver = { 1568 .probe = unittest_i2c_bus_probe, 1569 .remove = unittest_i2c_bus_remove, 1570 .driver = { 1571 .name = "unittest-i2c-bus", 1572 .of_match_table = of_match_ptr(unittest_i2c_bus_match), 1573 }, 1574 }; 1575 1576 static int unittest_i2c_dev_probe(struct i2c_client *client, 1577 const struct i2c_device_id *id) 1578 { 1579 struct device *dev = &client->dev; 1580 struct device_node *np = client->dev.of_node; 1581 1582 if (!np) { 1583 dev_err(dev, "No OF node\n"); 1584 return -EINVAL; 1585 } 1586 1587 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name); 1588 1589 return 0; 1590 }; 1591 1592 static int unittest_i2c_dev_remove(struct i2c_client *client) 1593 { 1594 struct device *dev = &client->dev; 1595 struct device_node *np = client->dev.of_node; 1596 1597 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name); 1598 return 0; 1599 } 1600 1601 static const struct i2c_device_id unittest_i2c_dev_id[] = { 1602 { .name = "unittest-i2c-dev" }, 1603 { } 1604 }; 1605 1606 static struct i2c_driver unittest_i2c_dev_driver = { 1607 .driver = { 1608 .name = "unittest-i2c-dev", 1609 .owner = THIS_MODULE, 1610 }, 1611 .probe = unittest_i2c_dev_probe, 1612 .remove = unittest_i2c_dev_remove, 1613 .id_table = unittest_i2c_dev_id, 1614 }; 1615 1616 #if IS_BUILTIN(CONFIG_I2C_MUX) 1617 1618 struct unittest_i2c_mux_data { 1619 int nchans; 1620 struct i2c_adapter *adap[]; 1621 }; 1622 1623 static int unittest_i2c_mux_select_chan(struct i2c_adapter *adap, 1624 void *client, u32 chan) 1625 { 1626 return 0; 1627 } 1628 1629 static int unittest_i2c_mux_probe(struct i2c_client *client, 1630 const struct i2c_device_id *id) 1631 { 1632 int ret, i, nchans, size; 1633 struct device *dev = &client->dev; 1634 struct i2c_adapter *adap = to_i2c_adapter(dev->parent); 1635 struct device_node *np = client->dev.of_node, *child; 1636 struct unittest_i2c_mux_data *stm; 1637 u32 reg, max_reg; 1638 1639 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name); 1640 1641 if (!np) { 1642 dev_err(dev, "No OF node\n"); 1643 return -EINVAL; 1644 } 1645 1646 max_reg = (u32)-1; 1647 for_each_child_of_node(np, child) { 1648 ret = of_property_read_u32(child, "reg", ®); 1649 if (ret) 1650 continue; 1651 if (max_reg == (u32)-1 || reg > max_reg) 1652 max_reg = reg; 1653 } 1654 nchans = max_reg == (u32)-1 ? 0 : max_reg + 1; 1655 if (nchans == 0) { 1656 dev_err(dev, "No channels\n"); 1657 return -EINVAL; 1658 } 1659 1660 size = offsetof(struct unittest_i2c_mux_data, adap[nchans]); 1661 stm = devm_kzalloc(dev, size, GFP_KERNEL); 1662 if (!stm) { 1663 dev_err(dev, "Out of memory\n"); 1664 return -ENOMEM; 1665 } 1666 stm->nchans = nchans; 1667 for (i = 0; i < nchans; i++) { 1668 stm->adap[i] = i2c_add_mux_adapter(adap, dev, client, 1669 0, i, 0, unittest_i2c_mux_select_chan, NULL); 1670 if (!stm->adap[i]) { 1671 dev_err(dev, "Failed to register mux #%d\n", i); 1672 for (i--; i >= 0; i--) 1673 i2c_del_mux_adapter(stm->adap[i]); 1674 return -ENODEV; 1675 } 1676 } 1677 1678 i2c_set_clientdata(client, stm); 1679 1680 return 0; 1681 }; 1682 1683 static int unittest_i2c_mux_remove(struct i2c_client *client) 1684 { 1685 struct device *dev = &client->dev; 1686 struct device_node *np = client->dev.of_node; 1687 struct unittest_i2c_mux_data *stm = i2c_get_clientdata(client); 1688 int i; 1689 1690 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name); 1691 for (i = stm->nchans - 1; i >= 0; i--) 1692 i2c_del_mux_adapter(stm->adap[i]); 1693 return 0; 1694 } 1695 1696 static const struct i2c_device_id unittest_i2c_mux_id[] = { 1697 { .name = "unittest-i2c-mux" }, 1698 { } 1699 }; 1700 1701 static struct i2c_driver unittest_i2c_mux_driver = { 1702 .driver = { 1703 .name = "unittest-i2c-mux", 1704 .owner = THIS_MODULE, 1705 }, 1706 .probe = unittest_i2c_mux_probe, 1707 .remove = unittest_i2c_mux_remove, 1708 .id_table = unittest_i2c_mux_id, 1709 }; 1710 1711 #endif 1712 1713 static int of_unittest_overlay_i2c_init(void) 1714 { 1715 int ret; 1716 1717 ret = i2c_add_driver(&unittest_i2c_dev_driver); 1718 if (unittest(ret == 0, 1719 "could not register unittest i2c device driver\n")) 1720 return ret; 1721 1722 ret = platform_driver_register(&unittest_i2c_bus_driver); 1723 if (unittest(ret == 0, 1724 "could not register unittest i2c bus driver\n")) 1725 return ret; 1726 1727 #if IS_BUILTIN(CONFIG_I2C_MUX) 1728 ret = i2c_add_driver(&unittest_i2c_mux_driver); 1729 if (unittest(ret == 0, 1730 "could not register unittest i2c mux driver\n")) 1731 return ret; 1732 #endif 1733 1734 return 0; 1735 } 1736 1737 static void of_unittest_overlay_i2c_cleanup(void) 1738 { 1739 #if IS_BUILTIN(CONFIG_I2C_MUX) 1740 i2c_del_driver(&unittest_i2c_mux_driver); 1741 #endif 1742 platform_driver_unregister(&unittest_i2c_bus_driver); 1743 i2c_del_driver(&unittest_i2c_dev_driver); 1744 } 1745 1746 static void of_unittest_overlay_i2c_12(void) 1747 { 1748 int ret; 1749 1750 /* device should enable */ 1751 ret = of_unittest_apply_overlay_check(12, 12, 0, 1, I2C_OVERLAY); 1752 if (ret != 0) 1753 return; 1754 1755 unittest(1, "overlay test %d passed\n", 12); 1756 } 1757 1758 /* test deactivation of device */ 1759 static void of_unittest_overlay_i2c_13(void) 1760 { 1761 int ret; 1762 1763 /* device should disable */ 1764 ret = of_unittest_apply_overlay_check(13, 13, 1, 0, I2C_OVERLAY); 1765 if (ret != 0) 1766 return; 1767 1768 unittest(1, "overlay test %d passed\n", 13); 1769 } 1770 1771 /* just check for i2c mux existence */ 1772 static void of_unittest_overlay_i2c_14(void) 1773 { 1774 } 1775 1776 static void of_unittest_overlay_i2c_15(void) 1777 { 1778 int ret; 1779 1780 /* device should enable */ 1781 ret = of_unittest_apply_overlay_check(16, 15, 0, 1, I2C_OVERLAY); 1782 if (ret != 0) 1783 return; 1784 1785 unittest(1, "overlay test %d passed\n", 15); 1786 } 1787 1788 #else 1789 1790 static inline void of_unittest_overlay_i2c_14(void) { } 1791 static inline void of_unittest_overlay_i2c_15(void) { } 1792 1793 #endif 1794 1795 static void __init of_unittest_overlay(void) 1796 { 1797 struct device_node *bus_np = NULL; 1798 int ret; 1799 1800 ret = platform_driver_register(&unittest_driver); 1801 if (ret != 0) { 1802 unittest(0, "could not register unittest driver\n"); 1803 goto out; 1804 } 1805 1806 bus_np = of_find_node_by_path(bus_path); 1807 if (bus_np == NULL) { 1808 unittest(0, "could not find bus_path \"%s\"\n", bus_path); 1809 goto out; 1810 } 1811 1812 ret = of_platform_populate(bus_np, of_default_bus_match_table, 1813 NULL, NULL); 1814 if (ret != 0) { 1815 unittest(0, "could not populate bus @ \"%s\"\n", bus_path); 1816 goto out; 1817 } 1818 1819 if (!of_unittest_device_exists(100, PDEV_OVERLAY)) { 1820 unittest(0, "could not find unittest0 @ \"%s\"\n", 1821 unittest_path(100, PDEV_OVERLAY)); 1822 goto out; 1823 } 1824 1825 if (of_unittest_device_exists(101, PDEV_OVERLAY)) { 1826 unittest(0, "unittest1 @ \"%s\" should not exist\n", 1827 unittest_path(101, PDEV_OVERLAY)); 1828 goto out; 1829 } 1830 1831 unittest(1, "basic infrastructure of overlays passed"); 1832 1833 /* tests in sequence */ 1834 of_unittest_overlay_0(); 1835 of_unittest_overlay_1(); 1836 of_unittest_overlay_2(); 1837 of_unittest_overlay_3(); 1838 of_unittest_overlay_4(); 1839 of_unittest_overlay_5(); 1840 of_unittest_overlay_6(); 1841 of_unittest_overlay_8(); 1842 1843 of_unittest_overlay_10(); 1844 of_unittest_overlay_11(); 1845 1846 #if IS_BUILTIN(CONFIG_I2C) 1847 if (unittest(of_unittest_overlay_i2c_init() == 0, "i2c init failed\n")) 1848 goto out; 1849 1850 of_unittest_overlay_i2c_12(); 1851 of_unittest_overlay_i2c_13(); 1852 of_unittest_overlay_i2c_14(); 1853 of_unittest_overlay_i2c_15(); 1854 1855 of_unittest_overlay_i2c_cleanup(); 1856 #endif 1857 1858 out: 1859 of_node_put(bus_np); 1860 } 1861 1862 #else 1863 static inline void __init of_unittest_overlay(void) { } 1864 #endif 1865 1866 static int __init of_unittest(void) 1867 { 1868 struct device_node *np; 1869 int res; 1870 1871 /* adding data for unittest */ 1872 res = unittest_data_add(); 1873 if (res) 1874 return res; 1875 if (!of_aliases) 1876 of_aliases = of_find_node_by_path("/aliases"); 1877 1878 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); 1879 if (!np) { 1880 pr_info("No testcase data in device tree; not running tests\n"); 1881 return 0; 1882 } 1883 of_node_put(np); 1884 1885 pr_info("start of unittest - you will see error messages\n"); 1886 of_unittest_check_tree_linkage(); 1887 of_unittest_check_phandles(); 1888 of_unittest_find_node_by_name(); 1889 of_unittest_dynamic(); 1890 of_unittest_parse_phandle_with_args(); 1891 of_unittest_property_string(); 1892 of_unittest_property_copy(); 1893 of_unittest_changeset(); 1894 of_unittest_parse_interrupts(); 1895 of_unittest_parse_interrupts_extended(); 1896 of_unittest_match_node(); 1897 of_unittest_platform_populate(); 1898 of_unittest_overlay(); 1899 1900 /* Double check linkage after removing testcase data */ 1901 of_unittest_check_tree_linkage(); 1902 1903 pr_info("end of unittest - %i passed, %i failed\n", 1904 unittest_results.passed, unittest_results.failed); 1905 1906 return 0; 1907 } 1908 late_initcall(of_unittest); 1909