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 <linux/bitops.h> 27 28#include "of_private.h" 29 30static struct unittest_results { 31 int passed; 32 int failed; 33} unittest_results; 34 35#define unittest(result, fmt, ...) ({ \ 36 bool failed = !(result); \ 37 if (failed) { \ 38 unittest_results.failed++; \ 39 pr_err("FAIL %s():%i " fmt, __func__, __LINE__, ##__VA_ARGS__); \ 40 } else { \ 41 unittest_results.passed++; \ 42 pr_debug("pass %s():%i\n", __func__, __LINE__); \ 43 } \ 44 failed; \ 45}) 46 47static void __init of_unittest_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 unittest(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 unittest(!np, "trailing '/' on /testcase-data/ should fail\n"); 60 61 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); 62 unittest(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 unittest(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 unittest(!np, "trailing '/' on testcase-alias/ should fail\n"); 74 75 np = of_find_node_by_path("testcase-alias/phandle-tests/consumer-a"); 76 unittest(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 unittest(!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 unittest(!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 unittest(!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 unittest(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:test/option", &options); 98 unittest(np && !strcmp("test/option", options), 99 "option path test, subcase #1 failed\n"); 100 of_node_put(np); 101 102 np = of_find_node_opts_by_path("/testcase-data/testcase-device1:test/option", &options); 103 unittest(np && !strcmp("test/option", options), 104 "option path test, subcase #2 failed\n"); 105 of_node_put(np); 106 107 np = of_find_node_opts_by_path("/testcase-data:testoption", NULL); 108 unittest(np, "NULL option path test failed\n"); 109 of_node_put(np); 110 111 np = of_find_node_opts_by_path("testcase-alias:testaliasoption", 112 &options); 113 unittest(np && !strcmp("testaliasoption", options), 114 "option alias path test failed\n"); 115 of_node_put(np); 116 117 np = of_find_node_opts_by_path("testcase-alias:test/alias/option", 118 &options); 119 unittest(np && !strcmp("test/alias/option", options), 120 "option alias path test, subcase #1 failed\n"); 121 of_node_put(np); 122 123 np = of_find_node_opts_by_path("testcase-alias:testaliasoption", NULL); 124 unittest(np, "NULL option alias path test failed\n"); 125 of_node_put(np); 126 127 options = "testoption"; 128 np = of_find_node_opts_by_path("testcase-alias", &options); 129 unittest(np && !options, "option clearing test failed\n"); 130 of_node_put(np); 131 132 options = "testoption"; 133 np = of_find_node_opts_by_path("/", &options); 134 unittest(np && !options, "option clearing root node test failed\n"); 135 of_node_put(np); 136} 137 138static void __init of_unittest_dynamic(void) 139{ 140 struct device_node *np; 141 struct property *prop; 142 143 np = of_find_node_by_path("/testcase-data"); 144 if (!np) { 145 pr_err("missing testcase data\n"); 146 return; 147 } 148 149 /* Array of 4 properties for the purpose of testing */ 150 prop = kzalloc(sizeof(*prop) * 4, GFP_KERNEL); 151 if (!prop) { 152 unittest(0, "kzalloc() failed\n"); 153 return; 154 } 155 156 /* Add a new property - should pass*/ 157 prop->name = "new-property"; 158 prop->value = "new-property-data"; 159 prop->length = strlen(prop->value); 160 unittest(of_add_property(np, prop) == 0, "Adding a new property failed\n"); 161 162 /* Try to add an existing property - should fail */ 163 prop++; 164 prop->name = "new-property"; 165 prop->value = "new-property-data-should-fail"; 166 prop->length = strlen(prop->value); 167 unittest(of_add_property(np, prop) != 0, 168 "Adding an existing property should have failed\n"); 169 170 /* Try to modify an existing property - should pass */ 171 prop->value = "modify-property-data-should-pass"; 172 prop->length = strlen(prop->value); 173 unittest(of_update_property(np, prop) == 0, 174 "Updating an existing property should have passed\n"); 175 176 /* Try to modify non-existent property - should pass*/ 177 prop++; 178 prop->name = "modify-property"; 179 prop->value = "modify-missing-property-data-should-pass"; 180 prop->length = strlen(prop->value); 181 unittest(of_update_property(np, prop) == 0, 182 "Updating a missing property should have passed\n"); 183 184 /* Remove property - should pass */ 185 unittest(of_remove_property(np, prop) == 0, 186 "Removing a property should have passed\n"); 187 188 /* Adding very large property - should pass */ 189 prop++; 190 prop->name = "large-property-PAGE_SIZEx8"; 191 prop->length = PAGE_SIZE * 8; 192 prop->value = kzalloc(prop->length, GFP_KERNEL); 193 unittest(prop->value != NULL, "Unable to allocate large buffer\n"); 194 if (prop->value) 195 unittest(of_add_property(np, prop) == 0, 196 "Adding a large property should have passed\n"); 197} 198 199static int __init of_unittest_check_node_linkage(struct device_node *np) 200{ 201 struct device_node *child; 202 int count = 0, rc; 203 204 for_each_child_of_node(np, child) { 205 if (child->parent != np) { 206 pr_err("Child node %s links to wrong parent %s\n", 207 child->name, np->name); 208 return -EINVAL; 209 } 210 211 rc = of_unittest_check_node_linkage(child); 212 if (rc < 0) 213 return rc; 214 count += rc; 215 } 216 217 return count + 1; 218} 219 220static void __init of_unittest_check_tree_linkage(void) 221{ 222 struct device_node *np; 223 int allnode_count = 0, child_count; 224 225 if (!of_root) 226 return; 227 228 for_each_of_allnodes(np) 229 allnode_count++; 230 child_count = of_unittest_check_node_linkage(of_root); 231 232 unittest(child_count > 0, "Device node data structure is corrupted\n"); 233 unittest(child_count == allnode_count, 234 "allnodes list size (%i) doesn't match sibling lists size (%i)\n", 235 allnode_count, child_count); 236 pr_debug("allnodes list size (%i); sibling lists size (%i)\n", allnode_count, child_count); 237} 238 239struct node_hash { 240 struct hlist_node node; 241 struct device_node *np; 242}; 243 244static DEFINE_HASHTABLE(phandle_ht, 8); 245static void __init of_unittest_check_phandles(void) 246{ 247 struct device_node *np; 248 struct node_hash *nh; 249 struct hlist_node *tmp; 250 int i, dup_count = 0, phandle_count = 0; 251 252 for_each_of_allnodes(np) { 253 if (!np->phandle) 254 continue; 255 256 hash_for_each_possible(phandle_ht, nh, node, np->phandle) { 257 if (nh->np->phandle == np->phandle) { 258 pr_info("Duplicate phandle! %i used by %s and %s\n", 259 np->phandle, nh->np->full_name, np->full_name); 260 dup_count++; 261 break; 262 } 263 } 264 265 nh = kzalloc(sizeof(*nh), GFP_KERNEL); 266 if (WARN_ON(!nh)) 267 return; 268 269 nh->np = np; 270 hash_add(phandle_ht, &nh->node, np->phandle); 271 phandle_count++; 272 } 273 unittest(dup_count == 0, "Found %i duplicates in %i phandles\n", 274 dup_count, phandle_count); 275 276 /* Clean up */ 277 hash_for_each_safe(phandle_ht, i, tmp, nh, node) { 278 hash_del(&nh->node); 279 kfree(nh); 280 } 281} 282 283static void __init of_unittest_parse_phandle_with_args(void) 284{ 285 struct device_node *np; 286 struct of_phandle_args args; 287 int i, rc; 288 289 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); 290 if (!np) { 291 pr_err("missing testcase data\n"); 292 return; 293 } 294 295 rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells"); 296 unittest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc); 297 298 for (i = 0; i < 8; i++) { 299 bool passed = true; 300 301 rc = of_parse_phandle_with_args(np, "phandle-list", 302 "#phandle-cells", i, &args); 303 304 /* Test the values from tests-phandle.dtsi */ 305 switch (i) { 306 case 0: 307 passed &= !rc; 308 passed &= (args.args_count == 1); 309 passed &= (args.args[0] == (i + 1)); 310 break; 311 case 1: 312 passed &= !rc; 313 passed &= (args.args_count == 2); 314 passed &= (args.args[0] == (i + 1)); 315 passed &= (args.args[1] == 0); 316 break; 317 case 2: 318 passed &= (rc == -ENOENT); 319 break; 320 case 3: 321 passed &= !rc; 322 passed &= (args.args_count == 3); 323 passed &= (args.args[0] == (i + 1)); 324 passed &= (args.args[1] == 4); 325 passed &= (args.args[2] == 3); 326 break; 327 case 4: 328 passed &= !rc; 329 passed &= (args.args_count == 2); 330 passed &= (args.args[0] == (i + 1)); 331 passed &= (args.args[1] == 100); 332 break; 333 case 5: 334 passed &= !rc; 335 passed &= (args.args_count == 0); 336 break; 337 case 6: 338 passed &= !rc; 339 passed &= (args.args_count == 1); 340 passed &= (args.args[0] == (i + 1)); 341 break; 342 case 7: 343 passed &= (rc == -ENOENT); 344 break; 345 default: 346 passed = false; 347 } 348 349 unittest(passed, "index %i - data error on node %s rc=%i\n", 350 i, args.np->full_name, rc); 351 } 352 353 /* Check for missing list property */ 354 rc = of_parse_phandle_with_args(np, "phandle-list-missing", 355 "#phandle-cells", 0, &args); 356 unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc); 357 rc = of_count_phandle_with_args(np, "phandle-list-missing", 358 "#phandle-cells"); 359 unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc); 360 361 /* Check for missing cells property */ 362 rc = of_parse_phandle_with_args(np, "phandle-list", 363 "#phandle-cells-missing", 0, &args); 364 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 365 rc = of_count_phandle_with_args(np, "phandle-list", 366 "#phandle-cells-missing"); 367 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 368 369 /* Check for bad phandle in list */ 370 rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle", 371 "#phandle-cells", 0, &args); 372 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 373 rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle", 374 "#phandle-cells"); 375 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 376 377 /* Check for incorrectly formed argument list */ 378 rc = of_parse_phandle_with_args(np, "phandle-list-bad-args", 379 "#phandle-cells", 1, &args); 380 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 381 rc = of_count_phandle_with_args(np, "phandle-list-bad-args", 382 "#phandle-cells"); 383 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); 384} 385 386static void __init of_unittest_property_string(void) 387{ 388 const char *strings[4]; 389 struct device_node *np; 390 int rc; 391 392 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); 393 if (!np) { 394 pr_err("No testcase data in device tree\n"); 395 return; 396 } 397 398 rc = of_property_match_string(np, "phandle-list-names", "first"); 399 unittest(rc == 0, "first expected:0 got:%i\n", rc); 400 rc = of_property_match_string(np, "phandle-list-names", "second"); 401 unittest(rc == 1, "second expected:1 got:%i\n", rc); 402 rc = of_property_match_string(np, "phandle-list-names", "third"); 403 unittest(rc == 2, "third expected:2 got:%i\n", rc); 404 rc = of_property_match_string(np, "phandle-list-names", "fourth"); 405 unittest(rc == -ENODATA, "unmatched string; rc=%i\n", rc); 406 rc = of_property_match_string(np, "missing-property", "blah"); 407 unittest(rc == -EINVAL, "missing property; rc=%i\n", rc); 408 rc = of_property_match_string(np, "empty-property", "blah"); 409 unittest(rc == -ENODATA, "empty property; rc=%i\n", rc); 410 rc = of_property_match_string(np, "unterminated-string", "blah"); 411 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc); 412 413 /* of_property_count_strings() tests */ 414 rc = of_property_count_strings(np, "string-property"); 415 unittest(rc == 1, "Incorrect string count; rc=%i\n", rc); 416 rc = of_property_count_strings(np, "phandle-list-names"); 417 unittest(rc == 3, "Incorrect string count; rc=%i\n", rc); 418 rc = of_property_count_strings(np, "unterminated-string"); 419 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc); 420 rc = of_property_count_strings(np, "unterminated-string-list"); 421 unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc); 422 423 /* of_property_read_string_index() tests */ 424 rc = of_property_read_string_index(np, "string-property", 0, strings); 425 unittest(rc == 0 && !strcmp(strings[0], "foobar"), "of_property_read_string_index() failure; rc=%i\n", rc); 426 strings[0] = NULL; 427 rc = of_property_read_string_index(np, "string-property", 1, strings); 428 unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc); 429 rc = of_property_read_string_index(np, "phandle-list-names", 0, strings); 430 unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc); 431 rc = of_property_read_string_index(np, "phandle-list-names", 1, strings); 432 unittest(rc == 0 && !strcmp(strings[0], "second"), "of_property_read_string_index() failure; rc=%i\n", rc); 433 rc = of_property_read_string_index(np, "phandle-list-names", 2, strings); 434 unittest(rc == 0 && !strcmp(strings[0], "third"), "of_property_read_string_index() failure; rc=%i\n", rc); 435 strings[0] = NULL; 436 rc = of_property_read_string_index(np, "phandle-list-names", 3, strings); 437 unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc); 438 strings[0] = NULL; 439 rc = of_property_read_string_index(np, "unterminated-string", 0, strings); 440 unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc); 441 rc = of_property_read_string_index(np, "unterminated-string-list", 0, strings); 442 unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc); 443 strings[0] = NULL; 444 rc = of_property_read_string_index(np, "unterminated-string-list", 2, strings); /* should fail */ 445 unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc); 446 strings[1] = NULL; 447 448 /* of_property_read_string_array() tests */ 449 rc = of_property_read_string_array(np, "string-property", strings, 4); 450 unittest(rc == 1, "Incorrect string count; rc=%i\n", rc); 451 rc = of_property_read_string_array(np, "phandle-list-names", strings, 4); 452 unittest(rc == 3, "Incorrect string count; rc=%i\n", rc); 453 rc = of_property_read_string_array(np, "unterminated-string", strings, 4); 454 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc); 455 /* -- An incorrectly formed string should cause a failure */ 456 rc = of_property_read_string_array(np, "unterminated-string-list", strings, 4); 457 unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc); 458 /* -- parsing the correctly formed strings should still work: */ 459 strings[2] = NULL; 460 rc = of_property_read_string_array(np, "unterminated-string-list", strings, 2); 461 unittest(rc == 2 && strings[2] == NULL, "of_property_read_string_array() failure; rc=%i\n", rc); 462 strings[1] = NULL; 463 rc = of_property_read_string_array(np, "phandle-list-names", strings, 1); 464 unittest(rc == 1 && strings[1] == NULL, "Overwrote end of string array; rc=%i, str='%s'\n", rc, strings[1]); 465} 466 467#define propcmp(p1, p2) (((p1)->length == (p2)->length) && \ 468 (p1)->value && (p2)->value && \ 469 !memcmp((p1)->value, (p2)->value, (p1)->length) && \ 470 !strcmp((p1)->name, (p2)->name)) 471static void __init of_unittest_property_copy(void) 472{ 473#ifdef CONFIG_OF_DYNAMIC 474 struct property p1 = { .name = "p1", .length = 0, .value = "" }; 475 struct property p2 = { .name = "p2", .length = 5, .value = "abcd" }; 476 struct property *new; 477 478 new = __of_prop_dup(&p1, GFP_KERNEL); 479 unittest(new && propcmp(&p1, new), "empty property didn't copy correctly\n"); 480 kfree(new->value); 481 kfree(new->name); 482 kfree(new); 483 484 new = __of_prop_dup(&p2, GFP_KERNEL); 485 unittest(new && propcmp(&p2, new), "non-empty property didn't copy correctly\n"); 486 kfree(new->value); 487 kfree(new->name); 488 kfree(new); 489#endif 490} 491 492static void __init of_unittest_changeset(void) 493{ 494#ifdef CONFIG_OF_DYNAMIC 495 struct property *ppadd, padd = { .name = "prop-add", .length = 0, .value = "" }; 496 struct property *ppupdate, pupdate = { .name = "prop-update", .length = 5, .value = "abcd" }; 497 struct property *ppremove; 498 struct device_node *n1, *n2, *n21, *nremove, *parent, *np; 499 struct of_changeset chgset; 500 501 n1 = __of_node_dup(NULL, "/testcase-data/changeset/n1"); 502 unittest(n1, "testcase setup failure\n"); 503 n2 = __of_node_dup(NULL, "/testcase-data/changeset/n2"); 504 unittest(n2, "testcase setup failure\n"); 505 n21 = __of_node_dup(NULL, "%s/%s", "/testcase-data/changeset/n2", "n21"); 506 unittest(n21, "testcase setup failure %p\n", n21); 507 nremove = of_find_node_by_path("/testcase-data/changeset/node-remove"); 508 unittest(nremove, "testcase setup failure\n"); 509 ppadd = __of_prop_dup(&padd, GFP_KERNEL); 510 unittest(ppadd, "testcase setup failure\n"); 511 ppupdate = __of_prop_dup(&pupdate, GFP_KERNEL); 512 unittest(ppupdate, "testcase setup failure\n"); 513 parent = nremove->parent; 514 n1->parent = parent; 515 n2->parent = parent; 516 n21->parent = n2; 517 n2->child = n21; 518 ppremove = of_find_property(parent, "prop-remove", NULL); 519 unittest(ppremove, "failed to find removal prop"); 520 521 of_changeset_init(&chgset); 522 unittest(!of_changeset_attach_node(&chgset, n1), "fail attach n1\n"); 523 unittest(!of_changeset_attach_node(&chgset, n2), "fail attach n2\n"); 524 unittest(!of_changeset_detach_node(&chgset, nremove), "fail remove node\n"); 525 unittest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n"); 526 unittest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop\n"); 527 unittest(!of_changeset_update_property(&chgset, parent, ppupdate), "fail update prop\n"); 528 unittest(!of_changeset_remove_property(&chgset, parent, ppremove), "fail remove prop\n"); 529 mutex_lock(&of_mutex); 530 unittest(!of_changeset_apply(&chgset), "apply failed\n"); 531 mutex_unlock(&of_mutex); 532 533 /* Make sure node names are constructed correctly */ 534 unittest((np = of_find_node_by_path("/testcase-data/changeset/n2/n21")), 535 "'%s' not added\n", n21->full_name); 536 of_node_put(np); 537 538 mutex_lock(&of_mutex); 539 unittest(!of_changeset_revert(&chgset), "revert failed\n"); 540 mutex_unlock(&of_mutex); 541 542 of_changeset_destroy(&chgset); 543#endif 544} 545 546static void __init of_unittest_parse_interrupts(void) 547{ 548 struct device_node *np; 549 struct of_phandle_args args; 550 int i, rc; 551 552 np = of_find_node_by_path("/testcase-data/interrupts/interrupts0"); 553 if (!np) { 554 pr_err("missing testcase data\n"); 555 return; 556 } 557 558 for (i = 0; i < 4; i++) { 559 bool passed = true; 560 561 args.args_count = 0; 562 rc = of_irq_parse_one(np, i, &args); 563 564 passed &= !rc; 565 passed &= (args.args_count == 1); 566 passed &= (args.args[0] == (i + 1)); 567 568 unittest(passed, "index %i - data error on node %s rc=%i\n", 569 i, args.np->full_name, rc); 570 } 571 of_node_put(np); 572 573 np = of_find_node_by_path("/testcase-data/interrupts/interrupts1"); 574 if (!np) { 575 pr_err("missing testcase data\n"); 576 return; 577 } 578 579 for (i = 0; i < 4; i++) { 580 bool passed = true; 581 582 args.args_count = 0; 583 rc = of_irq_parse_one(np, i, &args); 584 585 /* Test the values from tests-phandle.dtsi */ 586 switch (i) { 587 case 0: 588 passed &= !rc; 589 passed &= (args.args_count == 1); 590 passed &= (args.args[0] == 9); 591 break; 592 case 1: 593 passed &= !rc; 594 passed &= (args.args_count == 3); 595 passed &= (args.args[0] == 10); 596 passed &= (args.args[1] == 11); 597 passed &= (args.args[2] == 12); 598 break; 599 case 2: 600 passed &= !rc; 601 passed &= (args.args_count == 2); 602 passed &= (args.args[0] == 13); 603 passed &= (args.args[1] == 14); 604 break; 605 case 3: 606 passed &= !rc; 607 passed &= (args.args_count == 2); 608 passed &= (args.args[0] == 15); 609 passed &= (args.args[1] == 16); 610 break; 611 default: 612 passed = false; 613 } 614 unittest(passed, "index %i - data error on node %s rc=%i\n", 615 i, args.np->full_name, rc); 616 } 617 of_node_put(np); 618} 619 620static void __init of_unittest_parse_interrupts_extended(void) 621{ 622 struct device_node *np; 623 struct of_phandle_args args; 624 int i, rc; 625 626 np = of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0"); 627 if (!np) { 628 pr_err("missing testcase data\n"); 629 return; 630 } 631 632 for (i = 0; i < 7; i++) { 633 bool passed = true; 634 635 rc = of_irq_parse_one(np, i, &args); 636 637 /* Test the values from tests-phandle.dtsi */ 638 switch (i) { 639 case 0: 640 passed &= !rc; 641 passed &= (args.args_count == 1); 642 passed &= (args.args[0] == 1); 643 break; 644 case 1: 645 passed &= !rc; 646 passed &= (args.args_count == 3); 647 passed &= (args.args[0] == 2); 648 passed &= (args.args[1] == 3); 649 passed &= (args.args[2] == 4); 650 break; 651 case 2: 652 passed &= !rc; 653 passed &= (args.args_count == 2); 654 passed &= (args.args[0] == 5); 655 passed &= (args.args[1] == 6); 656 break; 657 case 3: 658 passed &= !rc; 659 passed &= (args.args_count == 1); 660 passed &= (args.args[0] == 9); 661 break; 662 case 4: 663 passed &= !rc; 664 passed &= (args.args_count == 3); 665 passed &= (args.args[0] == 10); 666 passed &= (args.args[1] == 11); 667 passed &= (args.args[2] == 12); 668 break; 669 case 5: 670 passed &= !rc; 671 passed &= (args.args_count == 2); 672 passed &= (args.args[0] == 13); 673 passed &= (args.args[1] == 14); 674 break; 675 case 6: 676 passed &= !rc; 677 passed &= (args.args_count == 1); 678 passed &= (args.args[0] == 15); 679 break; 680 default: 681 passed = false; 682 } 683 684 unittest(passed, "index %i - data error on node %s rc=%i\n", 685 i, args.np->full_name, rc); 686 } 687 of_node_put(np); 688} 689 690static const struct of_device_id match_node_table[] = { 691 { .data = "A", .name = "name0", }, /* Name alone is lowest priority */ 692 { .data = "B", .type = "type1", }, /* followed by type alone */ 693 694 { .data = "Ca", .name = "name2", .type = "type1", }, /* followed by both together */ 695 { .data = "Cb", .name = "name2", }, /* Only match when type doesn't match */ 696 { .data = "Cc", .name = "name2", .type = "type2", }, 697 698 { .data = "E", .compatible = "compat3" }, 699 { .data = "G", .compatible = "compat2", }, 700 { .data = "H", .compatible = "compat2", .name = "name5", }, 701 { .data = "I", .compatible = "compat2", .type = "type1", }, 702 { .data = "J", .compatible = "compat2", .type = "type1", .name = "name8", }, 703 { .data = "K", .compatible = "compat2", .name = "name9", }, 704 {} 705}; 706 707static struct { 708 const char *path; 709 const char *data; 710} match_node_tests[] = { 711 { .path = "/testcase-data/match-node/name0", .data = "A", }, 712 { .path = "/testcase-data/match-node/name1", .data = "B", }, 713 { .path = "/testcase-data/match-node/a/name2", .data = "Ca", }, 714 { .path = "/testcase-data/match-node/b/name2", .data = "Cb", }, 715 { .path = "/testcase-data/match-node/c/name2", .data = "Cc", }, 716 { .path = "/testcase-data/match-node/name3", .data = "E", }, 717 { .path = "/testcase-data/match-node/name4", .data = "G", }, 718 { .path = "/testcase-data/match-node/name5", .data = "H", }, 719 { .path = "/testcase-data/match-node/name6", .data = "G", }, 720 { .path = "/testcase-data/match-node/name7", .data = "I", }, 721 { .path = "/testcase-data/match-node/name8", .data = "J", }, 722 { .path = "/testcase-data/match-node/name9", .data = "K", }, 723}; 724 725static void __init of_unittest_match_node(void) 726{ 727 struct device_node *np; 728 const struct of_device_id *match; 729 int i; 730 731 for (i = 0; i < ARRAY_SIZE(match_node_tests); i++) { 732 np = of_find_node_by_path(match_node_tests[i].path); 733 if (!np) { 734 unittest(0, "missing testcase node %s\n", 735 match_node_tests[i].path); 736 continue; 737 } 738 739 match = of_match_node(match_node_table, np); 740 if (!match) { 741 unittest(0, "%s didn't match anything\n", 742 match_node_tests[i].path); 743 continue; 744 } 745 746 if (strcmp(match->data, match_node_tests[i].data) != 0) { 747 unittest(0, "%s got wrong match. expected %s, got %s\n", 748 match_node_tests[i].path, match_node_tests[i].data, 749 (const char *)match->data); 750 continue; 751 } 752 unittest(1, "passed"); 753 } 754} 755 756static const struct platform_device_info test_bus_info = { 757 .name = "unittest-bus", 758}; 759static void __init of_unittest_platform_populate(void) 760{ 761 int irq, rc; 762 struct device_node *np, *child, *grandchild; 763 struct platform_device *pdev, *test_bus; 764 const struct of_device_id match[] = { 765 { .compatible = "test-device", }, 766 {} 767 }; 768 769 np = of_find_node_by_path("/testcase-data"); 770 of_platform_populate(np, of_default_bus_match_table, NULL, NULL); 771 772 /* Test that a missing irq domain returns -EPROBE_DEFER */ 773 np = of_find_node_by_path("/testcase-data/testcase-device1"); 774 pdev = of_find_device_by_node(np); 775 unittest(pdev, "device 1 creation failed\n"); 776 777 irq = platform_get_irq(pdev, 0); 778 unittest(irq == -EPROBE_DEFER, "device deferred probe failed - %d\n", irq); 779 780 /* Test that a parsing failure does not return -EPROBE_DEFER */ 781 np = of_find_node_by_path("/testcase-data/testcase-device2"); 782 pdev = of_find_device_by_node(np); 783 unittest(pdev, "device 2 creation failed\n"); 784 irq = platform_get_irq(pdev, 0); 785 unittest(irq < 0 && irq != -EPROBE_DEFER, "device parsing error failed - %d\n", irq); 786 787 np = of_find_node_by_path("/testcase-data/platform-tests"); 788 unittest(np, "No testcase data in device tree\n"); 789 if (!np) 790 return; 791 792 test_bus = platform_device_register_full(&test_bus_info); 793 rc = PTR_ERR_OR_ZERO(test_bus); 794 unittest(!rc, "testbus registration failed; rc=%i\n", rc); 795 if (rc) 796 return; 797 test_bus->dev.of_node = np; 798 799 of_platform_populate(np, match, NULL, &test_bus->dev); 800 for_each_child_of_node(np, child) { 801 for_each_child_of_node(child, grandchild) 802 unittest(of_find_device_by_node(grandchild), 803 "Could not create device for node '%s'\n", 804 grandchild->name); 805 } 806 807 of_platform_depopulate(&test_bus->dev); 808 for_each_child_of_node(np, child) { 809 for_each_child_of_node(child, grandchild) 810 unittest(!of_find_device_by_node(grandchild), 811 "device didn't get destroyed '%s'\n", 812 grandchild->name); 813 } 814 815 platform_device_unregister(test_bus); 816 of_node_put(np); 817} 818 819/** 820 * update_node_properties - adds the properties 821 * of np into dup node (present in live tree) and 822 * updates parent of children of np to dup. 823 * 824 * @np: node already present in live tree 825 * @dup: node present in live tree to be updated 826 */ 827static void update_node_properties(struct device_node *np, 828 struct device_node *dup) 829{ 830 struct property *prop; 831 struct device_node *child; 832 833 for_each_property_of_node(np, prop) 834 of_add_property(dup, prop); 835 836 for_each_child_of_node(np, child) 837 child->parent = dup; 838} 839 840/** 841 * attach_node_and_children - attaches nodes 842 * and its children to live tree 843 * 844 * @np: Node to attach to live tree 845 */ 846static int attach_node_and_children(struct device_node *np) 847{ 848 struct device_node *next, *dup, *child; 849 unsigned long flags; 850 851 dup = of_find_node_by_path(np->full_name); 852 if (dup) { 853 update_node_properties(np, dup); 854 return 0; 855 } 856 857 child = np->child; 858 np->child = NULL; 859 860 mutex_lock(&of_mutex); 861 raw_spin_lock_irqsave(&devtree_lock, flags); 862 np->sibling = np->parent->child; 863 np->parent->child = np; 864 of_node_clear_flag(np, OF_DETACHED); 865 raw_spin_unlock_irqrestore(&devtree_lock, flags); 866 867 __of_attach_node_sysfs(np); 868 mutex_unlock(&of_mutex); 869 870 while (child) { 871 next = child->sibling; 872 attach_node_and_children(child); 873 child = next; 874 } 875 876 return 0; 877} 878 879/** 880 * unittest_data_add - Reads, copies data from 881 * linked tree and attaches it to the live tree 882 */ 883static int __init unittest_data_add(void) 884{ 885 void *unittest_data; 886 struct device_node *unittest_data_node, *np; 887 /* 888 * __dtb_testcases_begin[] and __dtb_testcases_end[] are magically 889 * created by cmd_dt_S_dtb in scripts/Makefile.lib 890 */ 891 extern uint8_t __dtb_testcases_begin[]; 892 extern uint8_t __dtb_testcases_end[]; 893 const int size = __dtb_testcases_end - __dtb_testcases_begin; 894 int rc; 895 896 if (!size) { 897 pr_warn("%s: No testcase data to attach; not running tests\n", 898 __func__); 899 return -ENODATA; 900 } 901 902 /* creating copy */ 903 unittest_data = kmemdup(__dtb_testcases_begin, size, GFP_KERNEL); 904 905 if (!unittest_data) { 906 pr_warn("%s: Failed to allocate memory for unittest_data; " 907 "not running tests\n", __func__); 908 return -ENOMEM; 909 } 910 of_fdt_unflatten_tree(unittest_data, &unittest_data_node); 911 if (!unittest_data_node) { 912 pr_warn("%s: No tree to attach; not running tests\n", __func__); 913 return -ENODATA; 914 } 915 of_node_set_flag(unittest_data_node, OF_DETACHED); 916 rc = of_resolve_phandles(unittest_data_node); 917 if (rc) { 918 pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__, rc); 919 return -EINVAL; 920 } 921 922 if (!of_root) { 923 of_root = unittest_data_node; 924 for_each_of_allnodes(np) 925 __of_attach_node_sysfs(np); 926 of_aliases = of_find_node_by_path("/aliases"); 927 of_chosen = of_find_node_by_path("/chosen"); 928 return 0; 929 } 930 931 /* attach the sub-tree to live tree */ 932 np = unittest_data_node->child; 933 while (np) { 934 struct device_node *next = np->sibling; 935 936 np->parent = of_root; 937 attach_node_and_children(np); 938 np = next; 939 } 940 return 0; 941} 942 943#ifdef CONFIG_OF_OVERLAY 944 945static int unittest_probe(struct platform_device *pdev) 946{ 947 struct device *dev = &pdev->dev; 948 struct device_node *np = dev->of_node; 949 950 if (np == NULL) { 951 dev_err(dev, "No OF data for device\n"); 952 return -EINVAL; 953 954 } 955 956 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name); 957 958 of_platform_populate(np, NULL, NULL, &pdev->dev); 959 960 return 0; 961} 962 963static int unittest_remove(struct platform_device *pdev) 964{ 965 struct device *dev = &pdev->dev; 966 struct device_node *np = dev->of_node; 967 968 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name); 969 return 0; 970} 971 972static const struct of_device_id unittest_match[] = { 973 { .compatible = "unittest", }, 974 {}, 975}; 976 977static struct platform_driver unittest_driver = { 978 .probe = unittest_probe, 979 .remove = unittest_remove, 980 .driver = { 981 .name = "unittest", 982 .owner = THIS_MODULE, 983 .of_match_table = of_match_ptr(unittest_match), 984 }, 985}; 986 987/* get the platform device instantiated at the path */ 988static struct platform_device *of_path_to_platform_device(const char *path) 989{ 990 struct device_node *np; 991 struct platform_device *pdev; 992 993 np = of_find_node_by_path(path); 994 if (np == NULL) 995 return NULL; 996 997 pdev = of_find_device_by_node(np); 998 of_node_put(np); 999 1000 return pdev; 1001} 1002 1003/* find out if a platform device exists at that path */ 1004static int of_path_platform_device_exists(const char *path) 1005{ 1006 struct platform_device *pdev; 1007 1008 pdev = of_path_to_platform_device(path); 1009 platform_device_put(pdev); 1010 return pdev != NULL; 1011} 1012 1013#if IS_BUILTIN(CONFIG_I2C) 1014 1015/* get the i2c client device instantiated at the path */ 1016static struct i2c_client *of_path_to_i2c_client(const char *path) 1017{ 1018 struct device_node *np; 1019 struct i2c_client *client; 1020 1021 np = of_find_node_by_path(path); 1022 if (np == NULL) 1023 return NULL; 1024 1025 client = of_find_i2c_device_by_node(np); 1026 of_node_put(np); 1027 1028 return client; 1029} 1030 1031/* find out if a i2c client device exists at that path */ 1032static int of_path_i2c_client_exists(const char *path) 1033{ 1034 struct i2c_client *client; 1035 1036 client = of_path_to_i2c_client(path); 1037 if (client) 1038 put_device(&client->dev); 1039 return client != NULL; 1040} 1041#else 1042static int of_path_i2c_client_exists(const char *path) 1043{ 1044 return 0; 1045} 1046#endif 1047 1048enum overlay_type { 1049 PDEV_OVERLAY, 1050 I2C_OVERLAY 1051}; 1052 1053static int of_path_device_type_exists(const char *path, 1054 enum overlay_type ovtype) 1055{ 1056 switch (ovtype) { 1057 case PDEV_OVERLAY: 1058 return of_path_platform_device_exists(path); 1059 case I2C_OVERLAY: 1060 return of_path_i2c_client_exists(path); 1061 } 1062 return 0; 1063} 1064 1065static const char *unittest_path(int nr, enum overlay_type ovtype) 1066{ 1067 const char *base; 1068 static char buf[256]; 1069 1070 switch (ovtype) { 1071 case PDEV_OVERLAY: 1072 base = "/testcase-data/overlay-node/test-bus"; 1073 break; 1074 case I2C_OVERLAY: 1075 base = "/testcase-data/overlay-node/test-bus/i2c-test-bus"; 1076 break; 1077 default: 1078 buf[0] = '\0'; 1079 return buf; 1080 } 1081 snprintf(buf, sizeof(buf) - 1, "%s/test-unittest%d", base, nr); 1082 buf[sizeof(buf) - 1] = '\0'; 1083 return buf; 1084} 1085 1086static int of_unittest_device_exists(int unittest_nr, enum overlay_type ovtype) 1087{ 1088 const char *path; 1089 1090 path = unittest_path(unittest_nr, ovtype); 1091 1092 switch (ovtype) { 1093 case PDEV_OVERLAY: 1094 return of_path_platform_device_exists(path); 1095 case I2C_OVERLAY: 1096 return of_path_i2c_client_exists(path); 1097 } 1098 return 0; 1099} 1100 1101static const char *overlay_path(int nr) 1102{ 1103 static char buf[256]; 1104 1105 snprintf(buf, sizeof(buf) - 1, 1106 "/testcase-data/overlay%d", nr); 1107 buf[sizeof(buf) - 1] = '\0'; 1108 1109 return buf; 1110} 1111 1112static const char *bus_path = "/testcase-data/overlay-node/test-bus"; 1113 1114/* it is guaranteed that overlay ids are assigned in sequence */ 1115#define MAX_UNITTEST_OVERLAYS 256 1116static unsigned long overlay_id_bits[BITS_TO_LONGS(MAX_UNITTEST_OVERLAYS)]; 1117static int overlay_first_id = -1; 1118 1119static void of_unittest_track_overlay(int id) 1120{ 1121 if (overlay_first_id < 0) 1122 overlay_first_id = id; 1123 id -= overlay_first_id; 1124 1125 /* we shouldn't need that many */ 1126 BUG_ON(id >= MAX_UNITTEST_OVERLAYS); 1127 overlay_id_bits[BIT_WORD(id)] |= BIT_MASK(id); 1128} 1129 1130static void of_unittest_untrack_overlay(int id) 1131{ 1132 if (overlay_first_id < 0) 1133 return; 1134 id -= overlay_first_id; 1135 BUG_ON(id >= MAX_UNITTEST_OVERLAYS); 1136 overlay_id_bits[BIT_WORD(id)] &= ~BIT_MASK(id); 1137} 1138 1139static void of_unittest_destroy_tracked_overlays(void) 1140{ 1141 int id, ret, defers; 1142 1143 if (overlay_first_id < 0) 1144 return; 1145 1146 /* try until no defers */ 1147 do { 1148 defers = 0; 1149 /* remove in reverse order */ 1150 for (id = MAX_UNITTEST_OVERLAYS - 1; id >= 0; id--) { 1151 if (!(overlay_id_bits[BIT_WORD(id)] & BIT_MASK(id))) 1152 continue; 1153 1154 ret = of_overlay_destroy(id + overlay_first_id); 1155 if (ret != 0) { 1156 defers++; 1157 pr_warn("%s: overlay destroy failed for #%d\n", 1158 __func__, id + overlay_first_id); 1159 continue; 1160 } 1161 1162 overlay_id_bits[BIT_WORD(id)] &= ~BIT_MASK(id); 1163 } 1164 } while (defers > 0); 1165} 1166 1167static int of_unittest_apply_overlay(int unittest_nr, int overlay_nr, 1168 int *overlay_id) 1169{ 1170 struct device_node *np = NULL; 1171 int ret, id = -1; 1172 1173 np = of_find_node_by_path(overlay_path(overlay_nr)); 1174 if (np == NULL) { 1175 unittest(0, "could not find overlay node @\"%s\"\n", 1176 overlay_path(overlay_nr)); 1177 ret = -EINVAL; 1178 goto out; 1179 } 1180 1181 ret = of_overlay_create(np); 1182 if (ret < 0) { 1183 unittest(0, "could not create overlay from \"%s\"\n", 1184 overlay_path(overlay_nr)); 1185 goto out; 1186 } 1187 id = ret; 1188 of_unittest_track_overlay(id); 1189 1190 ret = 0; 1191 1192out: 1193 of_node_put(np); 1194 1195 if (overlay_id) 1196 *overlay_id = id; 1197 1198 return ret; 1199} 1200 1201/* apply an overlay while checking before and after states */ 1202static int of_unittest_apply_overlay_check(int overlay_nr, int unittest_nr, 1203 int before, int after, enum overlay_type ovtype) 1204{ 1205 int ret; 1206 1207 /* unittest device must not be in before state */ 1208 if (of_unittest_device_exists(unittest_nr, ovtype) != before) { 1209 unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n", 1210 overlay_path(overlay_nr), 1211 unittest_path(unittest_nr, ovtype), 1212 !before ? "enabled" : "disabled"); 1213 return -EINVAL; 1214 } 1215 1216 ret = of_unittest_apply_overlay(overlay_nr, unittest_nr, NULL); 1217 if (ret != 0) { 1218 /* of_unittest_apply_overlay already called unittest() */ 1219 return ret; 1220 } 1221 1222 /* unittest device must be to set to after state */ 1223 if (of_unittest_device_exists(unittest_nr, ovtype) != after) { 1224 unittest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n", 1225 overlay_path(overlay_nr), 1226 unittest_path(unittest_nr, ovtype), 1227 !after ? "enabled" : "disabled"); 1228 return -EINVAL; 1229 } 1230 1231 return 0; 1232} 1233 1234/* apply an overlay and then revert it while checking before, after states */ 1235static int of_unittest_apply_revert_overlay_check(int overlay_nr, 1236 int unittest_nr, int before, int after, 1237 enum overlay_type ovtype) 1238{ 1239 int ret, ov_id; 1240 1241 /* unittest device must be in before state */ 1242 if (of_unittest_device_exists(unittest_nr, ovtype) != before) { 1243 unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n", 1244 overlay_path(overlay_nr), 1245 unittest_path(unittest_nr, ovtype), 1246 !before ? "enabled" : "disabled"); 1247 return -EINVAL; 1248 } 1249 1250 /* apply the overlay */ 1251 ret = of_unittest_apply_overlay(overlay_nr, unittest_nr, &ov_id); 1252 if (ret != 0) { 1253 /* of_unittest_apply_overlay already called unittest() */ 1254 return ret; 1255 } 1256 1257 /* unittest device must be in after state */ 1258 if (of_unittest_device_exists(unittest_nr, ovtype) != after) { 1259 unittest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n", 1260 overlay_path(overlay_nr), 1261 unittest_path(unittest_nr, ovtype), 1262 !after ? "enabled" : "disabled"); 1263 return -EINVAL; 1264 } 1265 1266 ret = of_overlay_destroy(ov_id); 1267 if (ret != 0) { 1268 unittest(0, "overlay @\"%s\" failed to be destroyed @\"%s\"\n", 1269 overlay_path(overlay_nr), 1270 unittest_path(unittest_nr, ovtype)); 1271 return ret; 1272 } 1273 1274 /* unittest device must be again in before state */ 1275 if (of_unittest_device_exists(unittest_nr, PDEV_OVERLAY) != before) { 1276 unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n", 1277 overlay_path(overlay_nr), 1278 unittest_path(unittest_nr, ovtype), 1279 !before ? "enabled" : "disabled"); 1280 return -EINVAL; 1281 } 1282 1283 return 0; 1284} 1285 1286/* test activation of device */ 1287static void of_unittest_overlay_0(void) 1288{ 1289 int ret; 1290 1291 /* device should enable */ 1292 ret = of_unittest_apply_overlay_check(0, 0, 0, 1, PDEV_OVERLAY); 1293 if (ret != 0) 1294 return; 1295 1296 unittest(1, "overlay test %d passed\n", 0); 1297} 1298 1299/* test deactivation of device */ 1300static void of_unittest_overlay_1(void) 1301{ 1302 int ret; 1303 1304 /* device should disable */ 1305 ret = of_unittest_apply_overlay_check(1, 1, 1, 0, PDEV_OVERLAY); 1306 if (ret != 0) 1307 return; 1308 1309 unittest(1, "overlay test %d passed\n", 1); 1310} 1311 1312/* test activation of device */ 1313static void of_unittest_overlay_2(void) 1314{ 1315 int ret; 1316 1317 /* device should enable */ 1318 ret = of_unittest_apply_overlay_check(2, 2, 0, 1, PDEV_OVERLAY); 1319 if (ret != 0) 1320 return; 1321 1322 unittest(1, "overlay test %d passed\n", 2); 1323} 1324 1325/* test deactivation of device */ 1326static void of_unittest_overlay_3(void) 1327{ 1328 int ret; 1329 1330 /* device should disable */ 1331 ret = of_unittest_apply_overlay_check(3, 3, 1, 0, PDEV_OVERLAY); 1332 if (ret != 0) 1333 return; 1334 1335 unittest(1, "overlay test %d passed\n", 3); 1336} 1337 1338/* test activation of a full device node */ 1339static void of_unittest_overlay_4(void) 1340{ 1341 int ret; 1342 1343 /* device should disable */ 1344 ret = of_unittest_apply_overlay_check(4, 4, 0, 1, PDEV_OVERLAY); 1345 if (ret != 0) 1346 return; 1347 1348 unittest(1, "overlay test %d passed\n", 4); 1349} 1350 1351/* test overlay apply/revert sequence */ 1352static void of_unittest_overlay_5(void) 1353{ 1354 int ret; 1355 1356 /* device should disable */ 1357 ret = of_unittest_apply_revert_overlay_check(5, 5, 0, 1, PDEV_OVERLAY); 1358 if (ret != 0) 1359 return; 1360 1361 unittest(1, "overlay test %d passed\n", 5); 1362} 1363 1364/* test overlay application in sequence */ 1365static void of_unittest_overlay_6(void) 1366{ 1367 struct device_node *np; 1368 int ret, i, ov_id[2]; 1369 int overlay_nr = 6, unittest_nr = 6; 1370 int before = 0, after = 1; 1371 1372 /* unittest device must be in before state */ 1373 for (i = 0; i < 2; i++) { 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 /* apply the overlays */ 1386 for (i = 0; i < 2; i++) { 1387 1388 np = of_find_node_by_path(overlay_path(overlay_nr + i)); 1389 if (np == NULL) { 1390 unittest(0, "could not find overlay node @\"%s\"\n", 1391 overlay_path(overlay_nr + i)); 1392 return; 1393 } 1394 1395 ret = of_overlay_create(np); 1396 if (ret < 0) { 1397 unittest(0, "could not create overlay from \"%s\"\n", 1398 overlay_path(overlay_nr + i)); 1399 return; 1400 } 1401 ov_id[i] = ret; 1402 of_unittest_track_overlay(ov_id[i]); 1403 } 1404 1405 for (i = 0; i < 2; i++) { 1406 /* unittest device must be in after state */ 1407 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY) 1408 != after) { 1409 unittest(0, "overlay @\"%s\" failed @\"%s\" %s\n", 1410 overlay_path(overlay_nr + i), 1411 unittest_path(unittest_nr + i, 1412 PDEV_OVERLAY), 1413 !after ? "enabled" : "disabled"); 1414 return; 1415 } 1416 } 1417 1418 for (i = 1; i >= 0; i--) { 1419 ret = of_overlay_destroy(ov_id[i]); 1420 if (ret != 0) { 1421 unittest(0, "overlay @\"%s\" failed destroy @\"%s\"\n", 1422 overlay_path(overlay_nr + i), 1423 unittest_path(unittest_nr + i, 1424 PDEV_OVERLAY)); 1425 return; 1426 } 1427 of_unittest_untrack_overlay(ov_id[i]); 1428 } 1429 1430 for (i = 0; i < 2; i++) { 1431 /* unittest device must be again in before state */ 1432 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY) 1433 != before) { 1434 unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n", 1435 overlay_path(overlay_nr + i), 1436 unittest_path(unittest_nr + i, 1437 PDEV_OVERLAY), 1438 !before ? "enabled" : "disabled"); 1439 return; 1440 } 1441 } 1442 1443 unittest(1, "overlay test %d passed\n", 6); 1444} 1445 1446/* test overlay application in sequence */ 1447static void of_unittest_overlay_8(void) 1448{ 1449 struct device_node *np; 1450 int ret, i, ov_id[2]; 1451 int overlay_nr = 8, unittest_nr = 8; 1452 1453 /* we don't care about device state in this test */ 1454 1455 /* apply the overlays */ 1456 for (i = 0; i < 2; i++) { 1457 1458 np = of_find_node_by_path(overlay_path(overlay_nr + i)); 1459 if (np == NULL) { 1460 unittest(0, "could not find overlay node @\"%s\"\n", 1461 overlay_path(overlay_nr + i)); 1462 return; 1463 } 1464 1465 ret = of_overlay_create(np); 1466 if (ret < 0) { 1467 unittest(0, "could not create overlay from \"%s\"\n", 1468 overlay_path(overlay_nr + i)); 1469 return; 1470 } 1471 ov_id[i] = ret; 1472 of_unittest_track_overlay(ov_id[i]); 1473 } 1474 1475 /* now try to remove first overlay (it should fail) */ 1476 ret = of_overlay_destroy(ov_id[0]); 1477 if (ret == 0) { 1478 unittest(0, "overlay @\"%s\" was destroyed @\"%s\"\n", 1479 overlay_path(overlay_nr + 0), 1480 unittest_path(unittest_nr, 1481 PDEV_OVERLAY)); 1482 return; 1483 } 1484 1485 /* removing them in order should work */ 1486 for (i = 1; i >= 0; i--) { 1487 ret = of_overlay_destroy(ov_id[i]); 1488 if (ret != 0) { 1489 unittest(0, "overlay @\"%s\" not destroyed @\"%s\"\n", 1490 overlay_path(overlay_nr + i), 1491 unittest_path(unittest_nr, 1492 PDEV_OVERLAY)); 1493 return; 1494 } 1495 of_unittest_untrack_overlay(ov_id[i]); 1496 } 1497 1498 unittest(1, "overlay test %d passed\n", 8); 1499} 1500 1501/* test insertion of a bus with parent devices */ 1502static void of_unittest_overlay_10(void) 1503{ 1504 int ret; 1505 char *child_path; 1506 1507 /* device should disable */ 1508 ret = of_unittest_apply_overlay_check(10, 10, 0, 1, PDEV_OVERLAY); 1509 if (unittest(ret == 0, 1510 "overlay test %d failed; overlay application\n", 10)) 1511 return; 1512 1513 child_path = kasprintf(GFP_KERNEL, "%s/test-unittest101", 1514 unittest_path(10, PDEV_OVERLAY)); 1515 if (unittest(child_path, "overlay test %d failed; kasprintf\n", 10)) 1516 return; 1517 1518 ret = of_path_device_type_exists(child_path, PDEV_OVERLAY); 1519 kfree(child_path); 1520 if (unittest(ret, "overlay test %d failed; no child device\n", 10)) 1521 return; 1522} 1523 1524/* test insertion of a bus with parent devices (and revert) */ 1525static void of_unittest_overlay_11(void) 1526{ 1527 int ret; 1528 1529 /* device should disable */ 1530 ret = of_unittest_apply_revert_overlay_check(11, 11, 0, 1, 1531 PDEV_OVERLAY); 1532 if (unittest(ret == 0, 1533 "overlay test %d failed; overlay application\n", 11)) 1534 return; 1535} 1536 1537#if IS_BUILTIN(CONFIG_I2C) && IS_ENABLED(CONFIG_OF_OVERLAY) 1538 1539struct unittest_i2c_bus_data { 1540 struct platform_device *pdev; 1541 struct i2c_adapter adap; 1542}; 1543 1544static int unittest_i2c_master_xfer(struct i2c_adapter *adap, 1545 struct i2c_msg *msgs, int num) 1546{ 1547 struct unittest_i2c_bus_data *std = i2c_get_adapdata(adap); 1548 1549 (void)std; 1550 1551 return num; 1552} 1553 1554static u32 unittest_i2c_functionality(struct i2c_adapter *adap) 1555{ 1556 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; 1557} 1558 1559static const struct i2c_algorithm unittest_i2c_algo = { 1560 .master_xfer = unittest_i2c_master_xfer, 1561 .functionality = unittest_i2c_functionality, 1562}; 1563 1564static int unittest_i2c_bus_probe(struct platform_device *pdev) 1565{ 1566 struct device *dev = &pdev->dev; 1567 struct device_node *np = dev->of_node; 1568 struct unittest_i2c_bus_data *std; 1569 struct i2c_adapter *adap; 1570 int ret; 1571 1572 if (np == NULL) { 1573 dev_err(dev, "No OF data for device\n"); 1574 return -EINVAL; 1575 1576 } 1577 1578 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name); 1579 1580 std = devm_kzalloc(dev, sizeof(*std), GFP_KERNEL); 1581 if (!std) { 1582 dev_err(dev, "Failed to allocate unittest i2c data\n"); 1583 return -ENOMEM; 1584 } 1585 1586 /* link them together */ 1587 std->pdev = pdev; 1588 platform_set_drvdata(pdev, std); 1589 1590 adap = &std->adap; 1591 i2c_set_adapdata(adap, std); 1592 adap->nr = -1; 1593 strlcpy(adap->name, pdev->name, sizeof(adap->name)); 1594 adap->class = I2C_CLASS_DEPRECATED; 1595 adap->algo = &unittest_i2c_algo; 1596 adap->dev.parent = dev; 1597 adap->dev.of_node = dev->of_node; 1598 adap->timeout = 5 * HZ; 1599 adap->retries = 3; 1600 1601 ret = i2c_add_numbered_adapter(adap); 1602 if (ret != 0) { 1603 dev_err(dev, "Failed to add I2C adapter\n"); 1604 return ret; 1605 } 1606 1607 return 0; 1608} 1609 1610static int unittest_i2c_bus_remove(struct platform_device *pdev) 1611{ 1612 struct device *dev = &pdev->dev; 1613 struct device_node *np = dev->of_node; 1614 struct unittest_i2c_bus_data *std = platform_get_drvdata(pdev); 1615 1616 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name); 1617 i2c_del_adapter(&std->adap); 1618 1619 return 0; 1620} 1621 1622static const struct of_device_id unittest_i2c_bus_match[] = { 1623 { .compatible = "unittest-i2c-bus", }, 1624 {}, 1625}; 1626 1627static struct platform_driver unittest_i2c_bus_driver = { 1628 .probe = unittest_i2c_bus_probe, 1629 .remove = unittest_i2c_bus_remove, 1630 .driver = { 1631 .name = "unittest-i2c-bus", 1632 .of_match_table = of_match_ptr(unittest_i2c_bus_match), 1633 }, 1634}; 1635 1636static int unittest_i2c_dev_probe(struct i2c_client *client, 1637 const struct i2c_device_id *id) 1638{ 1639 struct device *dev = &client->dev; 1640 struct device_node *np = client->dev.of_node; 1641 1642 if (!np) { 1643 dev_err(dev, "No OF node\n"); 1644 return -EINVAL; 1645 } 1646 1647 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name); 1648 1649 return 0; 1650}; 1651 1652static int unittest_i2c_dev_remove(struct i2c_client *client) 1653{ 1654 struct device *dev = &client->dev; 1655 struct device_node *np = client->dev.of_node; 1656 1657 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name); 1658 return 0; 1659} 1660 1661static const struct i2c_device_id unittest_i2c_dev_id[] = { 1662 { .name = "unittest-i2c-dev" }, 1663 { } 1664}; 1665 1666static struct i2c_driver unittest_i2c_dev_driver = { 1667 .driver = { 1668 .name = "unittest-i2c-dev", 1669 .owner = THIS_MODULE, 1670 }, 1671 .probe = unittest_i2c_dev_probe, 1672 .remove = unittest_i2c_dev_remove, 1673 .id_table = unittest_i2c_dev_id, 1674}; 1675 1676#if IS_BUILTIN(CONFIG_I2C_MUX) 1677 1678struct unittest_i2c_mux_data { 1679 int nchans; 1680 struct i2c_adapter *adap[]; 1681}; 1682 1683static int unittest_i2c_mux_select_chan(struct i2c_adapter *adap, 1684 void *client, u32 chan) 1685{ 1686 return 0; 1687} 1688 1689static int unittest_i2c_mux_probe(struct i2c_client *client, 1690 const struct i2c_device_id *id) 1691{ 1692 int ret, i, nchans, size; 1693 struct device *dev = &client->dev; 1694 struct i2c_adapter *adap = to_i2c_adapter(dev->parent); 1695 struct device_node *np = client->dev.of_node, *child; 1696 struct unittest_i2c_mux_data *stm; 1697 u32 reg, max_reg; 1698 1699 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name); 1700 1701 if (!np) { 1702 dev_err(dev, "No OF node\n"); 1703 return -EINVAL; 1704 } 1705 1706 max_reg = (u32)-1; 1707 for_each_child_of_node(np, child) { 1708 ret = of_property_read_u32(child, "reg", ®); 1709 if (ret) 1710 continue; 1711 if (max_reg == (u32)-1 || reg > max_reg) 1712 max_reg = reg; 1713 } 1714 nchans = max_reg == (u32)-1 ? 0 : max_reg + 1; 1715 if (nchans == 0) { 1716 dev_err(dev, "No channels\n"); 1717 return -EINVAL; 1718 } 1719 1720 size = offsetof(struct unittest_i2c_mux_data, adap[nchans]); 1721 stm = devm_kzalloc(dev, size, GFP_KERNEL); 1722 if (!stm) { 1723 dev_err(dev, "Out of memory\n"); 1724 return -ENOMEM; 1725 } 1726 stm->nchans = nchans; 1727 for (i = 0; i < nchans; i++) { 1728 stm->adap[i] = i2c_add_mux_adapter(adap, dev, client, 1729 0, i, 0, unittest_i2c_mux_select_chan, NULL); 1730 if (!stm->adap[i]) { 1731 dev_err(dev, "Failed to register mux #%d\n", i); 1732 for (i--; i >= 0; i--) 1733 i2c_del_mux_adapter(stm->adap[i]); 1734 return -ENODEV; 1735 } 1736 } 1737 1738 i2c_set_clientdata(client, stm); 1739 1740 return 0; 1741}; 1742 1743static int unittest_i2c_mux_remove(struct i2c_client *client) 1744{ 1745 struct device *dev = &client->dev; 1746 struct device_node *np = client->dev.of_node; 1747 struct unittest_i2c_mux_data *stm = i2c_get_clientdata(client); 1748 int i; 1749 1750 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name); 1751 for (i = stm->nchans - 1; i >= 0; i--) 1752 i2c_del_mux_adapter(stm->adap[i]); 1753 return 0; 1754} 1755 1756static const struct i2c_device_id unittest_i2c_mux_id[] = { 1757 { .name = "unittest-i2c-mux" }, 1758 { } 1759}; 1760 1761static struct i2c_driver unittest_i2c_mux_driver = { 1762 .driver = { 1763 .name = "unittest-i2c-mux", 1764 .owner = THIS_MODULE, 1765 }, 1766 .probe = unittest_i2c_mux_probe, 1767 .remove = unittest_i2c_mux_remove, 1768 .id_table = unittest_i2c_mux_id, 1769}; 1770 1771#endif 1772 1773static int of_unittest_overlay_i2c_init(void) 1774{ 1775 int ret; 1776 1777 ret = i2c_add_driver(&unittest_i2c_dev_driver); 1778 if (unittest(ret == 0, 1779 "could not register unittest i2c device driver\n")) 1780 return ret; 1781 1782 ret = platform_driver_register(&unittest_i2c_bus_driver); 1783 if (unittest(ret == 0, 1784 "could not register unittest i2c bus driver\n")) 1785 return ret; 1786 1787#if IS_BUILTIN(CONFIG_I2C_MUX) 1788 ret = i2c_add_driver(&unittest_i2c_mux_driver); 1789 if (unittest(ret == 0, 1790 "could not register unittest i2c mux driver\n")) 1791 return ret; 1792#endif 1793 1794 return 0; 1795} 1796 1797static void of_unittest_overlay_i2c_cleanup(void) 1798{ 1799#if IS_BUILTIN(CONFIG_I2C_MUX) 1800 i2c_del_driver(&unittest_i2c_mux_driver); 1801#endif 1802 platform_driver_unregister(&unittest_i2c_bus_driver); 1803 i2c_del_driver(&unittest_i2c_dev_driver); 1804} 1805 1806static void of_unittest_overlay_i2c_12(void) 1807{ 1808 int ret; 1809 1810 /* device should enable */ 1811 ret = of_unittest_apply_overlay_check(12, 12, 0, 1, I2C_OVERLAY); 1812 if (ret != 0) 1813 return; 1814 1815 unittest(1, "overlay test %d passed\n", 12); 1816} 1817 1818/* test deactivation of device */ 1819static void of_unittest_overlay_i2c_13(void) 1820{ 1821 int ret; 1822 1823 /* device should disable */ 1824 ret = of_unittest_apply_overlay_check(13, 13, 1, 0, I2C_OVERLAY); 1825 if (ret != 0) 1826 return; 1827 1828 unittest(1, "overlay test %d passed\n", 13); 1829} 1830 1831/* just check for i2c mux existence */ 1832static void of_unittest_overlay_i2c_14(void) 1833{ 1834} 1835 1836static void of_unittest_overlay_i2c_15(void) 1837{ 1838 int ret; 1839 1840 /* device should enable */ 1841 ret = of_unittest_apply_overlay_check(16, 15, 0, 1, I2C_OVERLAY); 1842 if (ret != 0) 1843 return; 1844 1845 unittest(1, "overlay test %d passed\n", 15); 1846} 1847 1848#else 1849 1850static inline void of_unittest_overlay_i2c_14(void) { } 1851static inline void of_unittest_overlay_i2c_15(void) { } 1852 1853#endif 1854 1855static void __init of_unittest_overlay(void) 1856{ 1857 struct device_node *bus_np = NULL; 1858 int ret; 1859 1860 ret = platform_driver_register(&unittest_driver); 1861 if (ret != 0) { 1862 unittest(0, "could not register unittest driver\n"); 1863 goto out; 1864 } 1865 1866 bus_np = of_find_node_by_path(bus_path); 1867 if (bus_np == NULL) { 1868 unittest(0, "could not find bus_path \"%s\"\n", bus_path); 1869 goto out; 1870 } 1871 1872 ret = of_platform_populate(bus_np, of_default_bus_match_table, 1873 NULL, NULL); 1874 if (ret != 0) { 1875 unittest(0, "could not populate bus @ \"%s\"\n", bus_path); 1876 goto out; 1877 } 1878 1879 if (!of_unittest_device_exists(100, PDEV_OVERLAY)) { 1880 unittest(0, "could not find unittest0 @ \"%s\"\n", 1881 unittest_path(100, PDEV_OVERLAY)); 1882 goto out; 1883 } 1884 1885 if (of_unittest_device_exists(101, PDEV_OVERLAY)) { 1886 unittest(0, "unittest1 @ \"%s\" should not exist\n", 1887 unittest_path(101, PDEV_OVERLAY)); 1888 goto out; 1889 } 1890 1891 unittest(1, "basic infrastructure of overlays passed"); 1892 1893 /* tests in sequence */ 1894 of_unittest_overlay_0(); 1895 of_unittest_overlay_1(); 1896 of_unittest_overlay_2(); 1897 of_unittest_overlay_3(); 1898 of_unittest_overlay_4(); 1899 of_unittest_overlay_5(); 1900 of_unittest_overlay_6(); 1901 of_unittest_overlay_8(); 1902 1903 of_unittest_overlay_10(); 1904 of_unittest_overlay_11(); 1905 1906#if IS_BUILTIN(CONFIG_I2C) 1907 if (unittest(of_unittest_overlay_i2c_init() == 0, "i2c init failed\n")) 1908 goto out; 1909 1910 of_unittest_overlay_i2c_12(); 1911 of_unittest_overlay_i2c_13(); 1912 of_unittest_overlay_i2c_14(); 1913 of_unittest_overlay_i2c_15(); 1914 1915 of_unittest_overlay_i2c_cleanup(); 1916#endif 1917 1918 of_unittest_destroy_tracked_overlays(); 1919 1920out: 1921 of_node_put(bus_np); 1922} 1923 1924#else 1925static inline void __init of_unittest_overlay(void) { } 1926#endif 1927 1928static int __init of_unittest(void) 1929{ 1930 struct device_node *np; 1931 int res; 1932 1933 /* adding data for unittest */ 1934 res = unittest_data_add(); 1935 if (res) 1936 return res; 1937 if (!of_aliases) 1938 of_aliases = of_find_node_by_path("/aliases"); 1939 1940 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); 1941 if (!np) { 1942 pr_info("No testcase data in device tree; not running tests\n"); 1943 return 0; 1944 } 1945 of_node_put(np); 1946 1947 pr_info("start of unittest - you will see error messages\n"); 1948 of_unittest_check_tree_linkage(); 1949 of_unittest_check_phandles(); 1950 of_unittest_find_node_by_name(); 1951 of_unittest_dynamic(); 1952 of_unittest_parse_phandle_with_args(); 1953 of_unittest_property_string(); 1954 of_unittest_property_copy(); 1955 of_unittest_changeset(); 1956 of_unittest_parse_interrupts(); 1957 of_unittest_parse_interrupts_extended(); 1958 of_unittest_match_node(); 1959 of_unittest_platform_populate(); 1960 of_unittest_overlay(); 1961 1962 /* Double check linkage after removing testcase data */ 1963 of_unittest_check_tree_linkage(); 1964 1965 pr_info("end of unittest - %i passed, %i failed\n", 1966 unittest_results.passed, unittest_results.failed); 1967 1968 return 0; 1969} 1970late_initcall(of_unittest); 1971