drivers/of/unittest.c

   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
  30 static 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
  47 static 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
 138 static 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
 199 static 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                         rc = -EINVAL;
 209                         goto put_child;
 210                 }
 211
 212                 rc = of_unittest_check_node_linkage(child);
 213                 if (rc < 0)
 214                         goto put_child;
 215                 count += rc;
 216         }
 217
 218         return count + 1;
 219 put_child:
 220         of_node_put(child);
 221         return rc;
 222 }
 223
 224 static void __init of_unittest_check_tree_linkage(void)
 225 {
 226         struct device_node *np;
 227         int allnode_count = 0, child_count;
 228
 229         if (!of_root)
 230                 return;
 231
 232         for_each_of_allnodes(np)
 233                 allnode_count++;
 234         child_count = of_unittest_check_node_linkage(of_root);
 235
 236         unittest(child_count > 0, "Device node data structure is corrupted\n");
 237         unittest(child_count == allnode_count,
 238                  "allnodes list size (%i) doesn't match sibling lists size (%i)\n",
 239                  allnode_count, child_count);
 240         pr_debug("allnodes list size (%i); sibling lists size (%i)\n", allnode_count, child_count);
 241 }
 242
 243 struct node_hash {
 244         struct hlist_node node;
 245         struct device_node *np;
 246 };
 247
 248 static DEFINE_HASHTABLE(phandle_ht, 8);
 249 static void __init of_unittest_check_phandles(void)
 250 {
 251         struct device_node *np;
 252         struct node_hash *nh;
 253         struct hlist_node *tmp;
 254         int i, dup_count = 0, phandle_count = 0;
 255
 256         for_each_of_allnodes(np) {
 257                 if (!np->phandle)
 258                         continue;
 259
 260                 hash_for_each_possible(phandle_ht, nh, node, np->phandle) {
 261                         if (nh->np->phandle == np->phandle) {
 262                                 pr_info("Duplicate phandle! %i used by %s and %s\n",
 263                                         np->phandle, nh->np->full_name, np->full_name);
 264                                 dup_count++;
 265                                 break;
 266                         }
 267                 }
 268
 269                 nh = kzalloc(sizeof(*nh), GFP_KERNEL);
 270                 if (WARN_ON(!nh))
 271                         return;
 272
 273                 nh->np = np;
 274                 hash_add(phandle_ht, &nh->node, np->phandle);
 275                 phandle_count++;
 276         }
 277         unittest(dup_count == 0, "Found %i duplicates in %i phandles\n",
 278                  dup_count, phandle_count);
 279
 280         /* Clean up */
 281         hash_for_each_safe(phandle_ht, i, tmp, nh, node) {
 282                 hash_del(&nh->node);
 283                 kfree(nh);
 284         }
 285 }
 286
 287 static void __init of_unittest_parse_phandle_with_args(void)
 288 {
 289         struct device_node *np;
 290         struct of_phandle_args args;
 291         int i, rc;
 292
 293         np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
 294         if (!np) {
 295                 pr_err("missing testcase data\n");
 296                 return;
 297         }
 298
 299         rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
 300         unittest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc);
 301
 302         for (i = 0; i < 8; i++) {
 303                 bool passed = true;
 304
 305                 rc = of_parse_phandle_with_args(np, "phandle-list",
 306                                                 "#phandle-cells", i, &args);
 307
 308                 /* Test the values from tests-phandle.dtsi */
 309                 switch (i) {
 310                 case 0:
 311                         passed &= !rc;
 312                         passed &= (args.args_count == 1);
 313                         passed &= (args.args[0] == (i + 1));
 314                         break;
 315                 case 1:
 316                         passed &= !rc;
 317                         passed &= (args.args_count == 2);
 318                         passed &= (args.args[0] == (i + 1));
 319                         passed &= (args.args[1] == 0);
 320                         break;
 321                 case 2:
 322                         passed &= (rc == -ENOENT);
 323                         break;
 324                 case 3:
 325                         passed &= !rc;
 326                         passed &= (args.args_count == 3);
 327                         passed &= (args.args[0] == (i + 1));
 328                         passed &= (args.args[1] == 4);
 329                         passed &= (args.args[2] == 3);
 330                         break;
 331                 case 4:
 332                         passed &= !rc;
 333                         passed &= (args.args_count == 2);
 334                         passed &= (args.args[0] == (i + 1));
 335                         passed &= (args.args[1] == 100);
 336                         break;
 337                 case 5:
 338                         passed &= !rc;
 339                         passed &= (args.args_count == 0);
 340                         break;
 341                 case 6:
 342                         passed &= !rc;
 343                         passed &= (args.args_count == 1);
 344                         passed &= (args.args[0] == (i + 1));
 345                         break;
 346                 case 7:
 347                         passed &= (rc == -ENOENT);
 348                         break;
 349                 default:
 350                         passed = false;
 351                 }
 352
 353                 unittest(passed, "index %i - data error on node %s rc=%i\n",
 354                          i, args.np->full_name, rc);
 355         }
 356
 357         /* Check for missing list property */
 358         rc = of_parse_phandle_with_args(np, "phandle-list-missing",
 359                                         "#phandle-cells", 0, &args);
 360         unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
 361         rc = of_count_phandle_with_args(np, "phandle-list-missing",
 362                                         "#phandle-cells");
 363         unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
 364
 365         /* Check for missing cells property */
 366         rc = of_parse_phandle_with_args(np, "phandle-list",
 367                                         "#phandle-cells-missing", 0, &args);
 368         unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
 369         rc = of_count_phandle_with_args(np, "phandle-list",
 370                                         "#phandle-cells-missing");
 371         unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
 372
 373         /* Check for bad phandle in list */
 374         rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle",
 375                                         "#phandle-cells", 0, &args);
 376         unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
 377         rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle",
 378                                         "#phandle-cells");
 379         unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
 380
 381         /* Check for incorrectly formed argument list */
 382         rc = of_parse_phandle_with_args(np, "phandle-list-bad-args",
 383                                         "#phandle-cells", 1, &args);
 384         unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
 385         rc = of_count_phandle_with_args(np, "phandle-list-bad-args",
 386                                         "#phandle-cells");
 387         unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
 388 }
 389
 390 static void __init of_unittest_property_string(void)
 391 {
 392         const char *strings[4];
 393         struct device_node *np;
 394         int rc;
 395
 396         np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
 397         if (!np) {
 398                 pr_err("No testcase data in device tree\n");
 399                 return;
 400         }
 401
 402         rc = of_property_match_string(np, "phandle-list-names", "first");
 403         unittest(rc == 0, "first expected:0 got:%i\n", rc);
 404         rc = of_property_match_string(np, "phandle-list-names", "second");
 405         unittest(rc == 1, "second expected:1 got:%i\n", rc);
 406         rc = of_property_match_string(np, "phandle-list-names", "third");
 407         unittest(rc == 2, "third expected:2 got:%i\n", rc);
 408         rc = of_property_match_string(np, "phandle-list-names", "fourth");
 409         unittest(rc == -ENODATA, "unmatched string; rc=%i\n", rc);
 410         rc = of_property_match_string(np, "missing-property", "blah");
 411         unittest(rc == -EINVAL, "missing property; rc=%i\n", rc);
 412         rc = of_property_match_string(np, "empty-property", "blah");
 413         unittest(rc == -ENODATA, "empty property; rc=%i\n", rc);
 414         rc = of_property_match_string(np, "unterminated-string", "blah");
 415         unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
 416
 417         /* of_property_count_strings() tests */
 418         rc = of_property_count_strings(np, "string-property");
 419         unittest(rc == 1, "Incorrect string count; rc=%i\n", rc);
 420         rc = of_property_count_strings(np, "phandle-list-names");
 421         unittest(rc == 3, "Incorrect string count; rc=%i\n", rc);
 422         rc = of_property_count_strings(np, "unterminated-string");
 423         unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
 424         rc = of_property_count_strings(np, "unterminated-string-list");
 425         unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
 426
 427         /* of_property_read_string_index() tests */
 428         rc = of_property_read_string_index(np, "string-property", 0, strings);
 429         unittest(rc == 0 && !strcmp(strings[0], "foobar"), "of_property_read_string_index() failure; rc=%i\n", rc);
 430         strings[0] = NULL;
 431         rc = of_property_read_string_index(np, "string-property", 1, strings);
 432         unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
 433         rc = of_property_read_string_index(np, "phandle-list-names", 0, strings);
 434         unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
 435         rc = of_property_read_string_index(np, "phandle-list-names", 1, strings);
 436         unittest(rc == 0 && !strcmp(strings[0], "second"), "of_property_read_string_index() failure; rc=%i\n", rc);
 437         rc = of_property_read_string_index(np, "phandle-list-names", 2, strings);
 438         unittest(rc == 0 && !strcmp(strings[0], "third"), "of_property_read_string_index() failure; rc=%i\n", rc);
 439         strings[0] = NULL;
 440         rc = of_property_read_string_index(np, "phandle-list-names", 3, strings);
 441         unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
 442         strings[0] = NULL;
 443         rc = of_property_read_string_index(np, "unterminated-string", 0, strings);
 444         unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
 445         rc = of_property_read_string_index(np, "unterminated-string-list", 0, strings);
 446         unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
 447         strings[0] = NULL;
 448         rc = of_property_read_string_index(np, "unterminated-string-list", 2, strings); /* should fail */
 449         unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
 450         strings[1] = NULL;
 451
 452         /* of_property_read_string_array() tests */
 453         rc = of_property_read_string_array(np, "string-property", strings, 4);
 454         unittest(rc == 1, "Incorrect string count; rc=%i\n", rc);
 455         rc = of_property_read_string_array(np, "phandle-list-names", strings, 4);
 456         unittest(rc == 3, "Incorrect string count; rc=%i\n", rc);
 457         rc = of_property_read_string_array(np, "unterminated-string", strings, 4);
 458         unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
 459         /* -- An incorrectly formed string should cause a failure */
 460         rc = of_property_read_string_array(np, "unterminated-string-list", strings, 4);
 461         unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
 462         /* -- parsing the correctly formed strings should still work: */
 463         strings[2] = NULL;
 464         rc = of_property_read_string_array(np, "unterminated-string-list", strings, 2);
 465         unittest(rc == 2 && strings[2] == NULL, "of_property_read_string_array() failure; rc=%i\n", rc);
 466         strings[1] = NULL;
 467         rc = of_property_read_string_array(np, "phandle-list-names", strings, 1);
 468         unittest(rc == 1 && strings[1] == NULL, "Overwrote end of string array; rc=%i, str='%s'\n", rc, strings[1]);
 469 }
 470
 471 #define propcmp(p1, p2) (((p1)->length == (p2)->length) && \
 472                         (p1)->value && (p2)->value && \
 473                         !memcmp((p1)->value, (p2)->value, (p1)->length) && \
 474                         !strcmp((p1)->name, (p2)->name))
 475 static void __init of_unittest_property_copy(void)
 476 {
 477 #ifdef CONFIG_OF_DYNAMIC
 478         struct property p1 = { .name = "p1", .length = 0, .value = "" };
 479         struct property p2 = { .name = "p2", .length = 5, .value = "abcd" };
 480         struct property *new;
 481
 482         new = __of_prop_dup(&p1, GFP_KERNEL);
 483         unittest(new && propcmp(&p1, new), "empty property didn't copy correctly\n");
 484         kfree(new->value);
 485         kfree(new->name);
 486         kfree(new);
 487
 488         new = __of_prop_dup(&p2, GFP_KERNEL);
 489         unittest(new && propcmp(&p2, new), "non-empty property didn't copy correctly\n");
 490         kfree(new->value);
 491         kfree(new->name);
 492         kfree(new);
 493 #endif
 494 }
 495
 496 static void __init of_unittest_changeset(void)
 497 {
 498 #ifdef CONFIG_OF_DYNAMIC
 499         struct property *ppadd, padd = { .name = "prop-add", .length = 0, .value = "" };
 500         struct property *ppupdate, pupdate = { .name = "prop-update", .length = 5, .value = "abcd" };
 501         struct property *ppremove;
 502         struct device_node *n1, *n2, *n21, *nremove, *parent, *np;
 503         struct of_changeset chgset;
 504
 505         n1 = __of_node_dup(NULL, "/testcase-data/changeset/n1");
 506         unittest(n1, "testcase setup failure\n");
 507         n2 = __of_node_dup(NULL, "/testcase-data/changeset/n2");
 508         unittest(n2, "testcase setup failure\n");
 509         n21 = __of_node_dup(NULL, "%s/%s", "/testcase-data/changeset/n2", "n21");
 510         unittest(n21, "testcase setup failure %p\n", n21);
 511         nremove = of_find_node_by_path("/testcase-data/changeset/node-remove");
 512         unittest(nremove, "testcase setup failure\n");
 513         ppadd = __of_prop_dup(&padd, GFP_KERNEL);
 514         unittest(ppadd, "testcase setup failure\n");
 515         ppupdate = __of_prop_dup(&pupdate, GFP_KERNEL);
 516         unittest(ppupdate, "testcase setup failure\n");
 517         parent = nremove->parent;
 518         n1->parent = parent;
 519         n2->parent = parent;
 520         n21->parent = n2;
 521         n2->child = n21;
 522         ppremove = of_find_property(parent, "prop-remove", NULL);
 523         unittest(ppremove, "failed to find removal prop");
 524
 525         of_changeset_init(&chgset);
 526         unittest(!of_changeset_attach_node(&chgset, n1), "fail attach n1\n");
 527         unittest(!of_changeset_attach_node(&chgset, n2), "fail attach n2\n");
 528         unittest(!of_changeset_detach_node(&chgset, nremove), "fail remove node\n");
 529         unittest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n");
 530         unittest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop\n");
 531         unittest(!of_changeset_update_property(&chgset, parent, ppupdate), "fail update prop\n");
 532         unittest(!of_changeset_remove_property(&chgset, parent, ppremove), "fail remove prop\n");
 533         unittest(!of_changeset_apply(&chgset), "apply failed\n");
 534
 535         /* Make sure node names are constructed correctly */
 536         unittest((np = of_find_node_by_path("/testcase-data/changeset/n2/n21")),
 537                  "'%s' not added\n", n21->full_name);
 538         of_node_put(np);
 539
 540         unittest(!of_changeset_revert(&chgset), "revert failed\n");
 541
 542         of_changeset_destroy(&chgset);
 543 #endif
 544 }
 545
 546 static 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
 620 static 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
 690 static 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
 707 static 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
 725 static 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
 756 static struct resource test_bus_res = {
 757         .start = 0xfffffff8,
 758         .end = 0xfffffff9,
 759         .flags = IORESOURCE_MEM,
 760 };
 761 static const struct platform_device_info test_bus_info = {
 762         .name = "unittest-bus",
 763 };
 764 static void __init of_unittest_platform_populate(void)
 765 {
 766         int irq, rc;
 767         struct device_node *np, *child, *grandchild;
 768         struct platform_device *pdev, *test_bus;
 769         const struct of_device_id match[] = {
 770                 { .compatible = "test-device", },
 771                 {}
 772         };
 773
 774         np = of_find_node_by_path("/testcase-data");
 775         of_platform_populate(np, of_default_bus_match_table, NULL, NULL);
 776
 777         /* Test that a missing irq domain returns -EPROBE_DEFER */
 778         np = of_find_node_by_path("/testcase-data/testcase-device1");
 779         pdev = of_find_device_by_node(np);
 780         unittest(pdev, "device 1 creation failed\n");
 781
 782         irq = platform_get_irq(pdev, 0);
 783         unittest(irq == -EPROBE_DEFER, "device deferred probe failed - %d\n", irq);
 784
 785         /* Test that a parsing failure does not return -EPROBE_DEFER */
 786         np = of_find_node_by_path("/testcase-data/testcase-device2");
 787         pdev = of_find_device_by_node(np);
 788         unittest(pdev, "device 2 creation failed\n");
 789         irq = platform_get_irq(pdev, 0);
 790         unittest(irq < 0 && irq != -EPROBE_DEFER, "device parsing error failed - %d\n", irq);
 791
 792         np = of_find_node_by_path("/testcase-data/platform-tests");
 793         unittest(np, "No testcase data in device tree\n");
 794         if (!np)
 795                 return;
 796
 797         test_bus = platform_device_register_full(&test_bus_info);
 798         rc = PTR_ERR_OR_ZERO(test_bus);
 799         unittest(!rc, "testbus registration failed; rc=%i\n", rc);
 800         if (rc)
 801                 return;
 802         test_bus->dev.of_node = np;
 803
 804         /*
 805          * Add a dummy resource to the test bus node after it is
 806          * registered to catch problems with un-inserted resources. The
 807          * DT code doesn't insert the resources, and it has caused the
 808          * kernel to oops in the past. This makes sure the same bug
 809          * doesn't crop up again.
 810          */
 811         platform_device_add_resources(test_bus, &test_bus_res, 1);
 812
 813         of_platform_populate(np, match, NULL, &test_bus->dev);
 814         for_each_child_of_node(np, child) {
 815                 for_each_child_of_node(child, grandchild)
 816                         unittest(of_find_device_by_node(grandchild),
 817                                  "Could not create device for node '%s'\n",
 818                                  grandchild->name);
 819         }
 820
 821         of_platform_depopulate(&test_bus->dev);
 822         for_each_child_of_node(np, child) {
 823                 for_each_child_of_node(child, grandchild)
 824                         unittest(!of_find_device_by_node(grandchild),
 825                                  "device didn't get destroyed '%s'\n",
 826                                  grandchild->name);
 827         }
 828
 829         platform_device_unregister(test_bus);
 830         of_node_put(np);
 831 }
 832
 833 /**
 834  *      update_node_properties - adds the properties
 835  *      of np into dup node (present in live tree) and
 836  *      updates parent of children of np to dup.
 837  *
 838  *      @np:    node already present in live tree
 839  *      @dup:   node present in live tree to be updated
 840  */
 841 static void update_node_properties(struct device_node *np,
 842                                         struct device_node *dup)
 843 {
 844         struct property *prop;
 845         struct device_node *child;
 846
 847         for_each_property_of_node(np, prop)
 848                 of_add_property(dup, prop);
 849
 850         for_each_child_of_node(np, child)
 851                 child->parent = dup;
 852 }
 853
 854 /**
 855  *      attach_node_and_children - attaches nodes
 856  *      and its children to live tree
 857  *
 858  *      @np:    Node to attach to live tree
 859  */
 860 static int attach_node_and_children(struct device_node *np)
 861 {
 862         struct device_node *next, *dup, *child;
 863         unsigned long flags;
 864
 865         dup = of_find_node_by_path(np->full_name);
 866         if (dup) {
 867                 update_node_properties(np, dup);
 868                 return 0;
 869         }
 870
 871         child = np->child;
 872         np->child = NULL;
 873
 874         mutex_lock(&of_mutex);
 875         raw_spin_lock_irqsave(&devtree_lock, flags);
 876         np->sibling = np->parent->child;
 877         np->parent->child = np;
 878         of_node_clear_flag(np, OF_DETACHED);
 879         raw_spin_unlock_irqrestore(&devtree_lock, flags);
 880
 881         __of_attach_node_sysfs(np);
 882         mutex_unlock(&of_mutex);
 883
 884         while (child) {
 885                 next = child->sibling;
 886                 attach_node_and_children(child);
 887                 child = next;
 888         }
 889
 890         return 0;
 891 }
 892
 893 /**
 894  *      unittest_data_add - Reads, copies data from
 895  *      linked tree and attaches it to the live tree
 896  */
 897 static int __init unittest_data_add(void)
 898 {
 899         void *unittest_data;
 900         struct device_node *unittest_data_node, *np;
 901         /*
 902          * __dtb_testcases_begin[] and __dtb_testcases_end[] are magically
 903          * created by cmd_dt_S_dtb in scripts/Makefile.lib
 904          */
 905         extern uint8_t __dtb_testcases_begin[];
 906         extern uint8_t __dtb_testcases_end[];
 907         const int size = __dtb_testcases_end - __dtb_testcases_begin;
 908         int rc;
 909
 910         if (!size) {
 911                 pr_warn("%s: No testcase data to attach; not running tests\n",
 912                         __func__);
 913                 return -ENODATA;
 914         }
 915
 916         /* creating copy */
 917         unittest_data = kmemdup(__dtb_testcases_begin, size, GFP_KERNEL);
 918
 919         if (!unittest_data) {
 920                 pr_warn("%s: Failed to allocate memory for unittest_data; "
 921                         "not running tests\n", __func__);
 922                 return -ENOMEM;
 923         }
 924         of_fdt_unflatten_tree(unittest_data, &unittest_data_node);
 925         if (!unittest_data_node) {
 926                 pr_warn("%s: No tree to attach; not running tests\n", __func__);
 927                 return -ENODATA;
 928         }
 929         of_node_set_flag(unittest_data_node, OF_DETACHED);
 930         rc = of_resolve_phandles(unittest_data_node);
 931         if (rc) {
 932                 pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__, rc);
 933                 return -EINVAL;
 934         }
 935
 936         if (!of_root) {
 937                 of_root = unittest_data_node;
 938                 for_each_of_allnodes(np)
 939                         __of_attach_node_sysfs(np);
 940                 of_aliases = of_find_node_by_path("/aliases");
 941                 of_chosen = of_find_node_by_path("/chosen");
 942                 return 0;
 943         }
 944
 945         /* attach the sub-tree to live tree */
 946         np = unittest_data_node->child;
 947         while (np) {
 948                 struct device_node *next = np->sibling;
 949
 950                 np->parent = of_root;
 951                 attach_node_and_children(np);
 952                 np = next;
 953         }
 954         return 0;
 955 }
 956
 957 #ifdef CONFIG_OF_OVERLAY
 958
 959 static int unittest_probe(struct platform_device *pdev)
 960 {
 961         struct device *dev = &pdev->dev;
 962         struct device_node *np = dev->of_node;
 963
 964         if (np == NULL) {
 965                 dev_err(dev, "No OF data for device\n");
 966                 return -EINVAL;
 967
 968         }
 969
 970         dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
 971
 972         of_platform_populate(np, NULL, NULL, &pdev->dev);
 973
 974         return 0;
 975 }
 976
 977 static int unittest_remove(struct platform_device *pdev)
 978 {
 979         struct device *dev = &pdev->dev;
 980         struct device_node *np = dev->of_node;
 981
 982         dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
 983         return 0;
 984 }
 985
 986 static const struct of_device_id unittest_match[] = {
 987         { .compatible = "unittest", },
 988         {},
 989 };
 990
 991 static struct platform_driver unittest_driver = {
 992         .probe                  = unittest_probe,
 993         .remove                 = unittest_remove,
 994         .driver = {
 995                 .name           = "unittest",
 996                 .of_match_table = of_match_ptr(unittest_match),
 997         },
 998 };
 999
1000 /* get the platform device instantiated at the path */
1001 static struct platform_device *of_path_to_platform_device(const char *path)
1002 {
1003         struct device_node *np;
1004         struct platform_device *pdev;
1005
1006         np = of_find_node_by_path(path);
1007         if (np == NULL)
1008                 return NULL;
1009
1010         pdev = of_find_device_by_node(np);
1011         of_node_put(np);
1012
1013         return pdev;
1014 }
1015
1016 /* find out if a platform device exists at that path */
1017 static int of_path_platform_device_exists(const char *path)
1018 {
1019         struct platform_device *pdev;
1020
1021         pdev = of_path_to_platform_device(path);
1022         platform_device_put(pdev);
1023         return pdev != NULL;
1024 }
1025
1026 #if IS_BUILTIN(CONFIG_I2C)
1027
1028 /* get the i2c client device instantiated at the path */
1029 static struct i2c_client *of_path_to_i2c_client(const char *path)
1030 {
1031         struct device_node *np;
1032         struct i2c_client *client;
1033
1034         np = of_find_node_by_path(path);
1035         if (np == NULL)
1036                 return NULL;
1037
1038         client = of_find_i2c_device_by_node(np);
1039         of_node_put(np);
1040
1041         return client;
1042 }
1043
1044 /* find out if a i2c client device exists at that path */
1045 static int of_path_i2c_client_exists(const char *path)
1046 {
1047         struct i2c_client *client;
1048
1049         client = of_path_to_i2c_client(path);
1050         if (client)
1051                 put_device(&client->dev);
1052         return client != NULL;
1053 }
1054 #else
1055 static int of_path_i2c_client_exists(const char *path)
1056 {
1057         return 0;
1058 }
1059 #endif
1060
1061 enum overlay_type {
1062         PDEV_OVERLAY,
1063         I2C_OVERLAY
1064 };
1065
1066 static int of_path_device_type_exists(const char *path,
1067                 enum overlay_type ovtype)
1068 {
1069         switch (ovtype) {
1070         case PDEV_OVERLAY:
1071                 return of_path_platform_device_exists(path);
1072         case I2C_OVERLAY:
1073                 return of_path_i2c_client_exists(path);
1074         }
1075         return 0;
1076 }
1077
1078 static const char *unittest_path(int nr, enum overlay_type ovtype)
1079 {
1080         const char *base;
1081         static char buf[256];
1082
1083         switch (ovtype) {
1084         case PDEV_OVERLAY:
1085                 base = "/testcase-data/overlay-node/test-bus";
1086                 break;
1087         case I2C_OVERLAY:
1088                 base = "/testcase-data/overlay-node/test-bus/i2c-test-bus";
1089                 break;
1090         default:
1091                 buf[0] = '\0';
1092                 return buf;
1093         }
1094         snprintf(buf, sizeof(buf) - 1, "%s/test-unittest%d", base, nr);
1095         buf[sizeof(buf) - 1] = '\0';
1096         return buf;
1097 }
1098
1099 static int of_unittest_device_exists(int unittest_nr, enum overlay_type ovtype)
1100 {
1101         const char *path;
1102
1103         path = unittest_path(unittest_nr, ovtype);
1104
1105         switch (ovtype) {
1106         case PDEV_OVERLAY:
1107                 return of_path_platform_device_exists(path);
1108         case I2C_OVERLAY:
1109                 return of_path_i2c_client_exists(path);
1110         }
1111         return 0;
1112 }
1113
1114 static const char *overlay_path(int nr)
1115 {
1116         static char buf[256];
1117
1118         snprintf(buf, sizeof(buf) - 1,
1119                 "/testcase-data/overlay%d", nr);
1120         buf[sizeof(buf) - 1] = '\0';
1121
1122         return buf;
1123 }
1124
1125 static const char *bus_path = "/testcase-data/overlay-node/test-bus";
1126
1127 /* it is guaranteed that overlay ids are assigned in sequence */
1128 #define MAX_UNITTEST_OVERLAYS   256
1129 static unsigned long overlay_id_bits[BITS_TO_LONGS(MAX_UNITTEST_OVERLAYS)];
1130 static int overlay_first_id = -1;
1131
1132 static void of_unittest_track_overlay(int id)
1133 {
1134         if (overlay_first_id < 0)
1135                 overlay_first_id = id;
1136         id -= overlay_first_id;
1137
1138         /* we shouldn't need that many */
1139         BUG_ON(id >= MAX_UNITTEST_OVERLAYS);
1140         overlay_id_bits[BIT_WORD(id)] |= BIT_MASK(id);
1141 }
1142
1143 static void of_unittest_untrack_overlay(int id)
1144 {
1145         if (overlay_first_id < 0)
1146                 return;
1147         id -= overlay_first_id;
1148         BUG_ON(id >= MAX_UNITTEST_OVERLAYS);
1149         overlay_id_bits[BIT_WORD(id)] &= ~BIT_MASK(id);
1150 }
1151
1152 static void of_unittest_destroy_tracked_overlays(void)
1153 {
1154         int id, ret, defers;
1155
1156         if (overlay_first_id < 0)
1157                 return;
1158
1159         /* try until no defers */
1160         do {
1161                 defers = 0;
1162                 /* remove in reverse order */
1163                 for (id = MAX_UNITTEST_OVERLAYS - 1; id >= 0; id--) {
1164                         if (!(overlay_id_bits[BIT_WORD(id)] & BIT_MASK(id)))
1165                                 continue;
1166
1167                         ret = of_overlay_destroy(id + overlay_first_id);
1168                         if (ret == -ENODEV) {
1169                                 pr_warn("%s: no overlay to destroy for #%d\n",
1170                                         __func__, id + overlay_first_id);
1171                                 continue;
1172                         }
1173                         if (ret != 0) {
1174                                 defers++;
1175                                 pr_warn("%s: overlay destroy failed for #%d\n",
1176                                         __func__, id + overlay_first_id);
1177                                 continue;
1178                         }
1179
1180                         overlay_id_bits[BIT_WORD(id)] &= ~BIT_MASK(id);
1181                 }
1182         } while (defers > 0);
1183 }
1184
1185 static int of_unittest_apply_overlay(int unittest_nr, int overlay_nr,
1186                 int *overlay_id)
1187 {
1188         struct device_node *np = NULL;
1189         int ret, id = -1;
1190
1191         np = of_find_node_by_path(overlay_path(overlay_nr));
1192         if (np == NULL) {
1193                 unittest(0, "could not find overlay node @\"%s\"\n",
1194                                 overlay_path(overlay_nr));
1195                 ret = -EINVAL;
1196                 goto out;
1197         }
1198
1199         ret = of_overlay_create(np);
1200         if (ret < 0) {
1201                 unittest(0, "could not create overlay from \"%s\"\n",
1202                                 overlay_path(overlay_nr));
1203                 goto out;
1204         }
1205         id = ret;
1206         of_unittest_track_overlay(id);
1207
1208         ret = 0;
1209
1210 out:
1211         of_node_put(np);
1212
1213         if (overlay_id)
1214                 *overlay_id = id;
1215
1216         return ret;
1217 }
1218
1219 /* apply an overlay while checking before and after states */
1220 static int of_unittest_apply_overlay_check(int overlay_nr, int unittest_nr,
1221                 int before, int after, enum overlay_type ovtype)
1222 {
1223         int ret;
1224
1225         /* unittest device must not be in before state */
1226         if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
1227                 unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1228                                 overlay_path(overlay_nr),
1229                                 unittest_path(unittest_nr, ovtype),
1230                                 !before ? "enabled" : "disabled");
1231                 return -EINVAL;
1232         }
1233
1234         ret = of_unittest_apply_overlay(overlay_nr, unittest_nr, NULL);
1235         if (ret != 0) {
1236                 /* of_unittest_apply_overlay already called unittest() */
1237                 return ret;
1238         }
1239
1240         /* unittest device must be to set to after state */
1241         if (of_unittest_device_exists(unittest_nr, ovtype) != after) {
1242                 unittest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n",
1243                                 overlay_path(overlay_nr),
1244                                 unittest_path(unittest_nr, ovtype),
1245                                 !after ? "enabled" : "disabled");
1246                 return -EINVAL;
1247         }
1248
1249         return 0;
1250 }
1251
1252 /* apply an overlay and then revert it while checking before, after states */
1253 static int of_unittest_apply_revert_overlay_check(int overlay_nr,
1254                 int unittest_nr, int before, int after,
1255                 enum overlay_type ovtype)
1256 {
1257         int ret, ov_id;
1258
1259         /* unittest device must be in before state */
1260         if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
1261                 unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1262                                 overlay_path(overlay_nr),
1263                                 unittest_path(unittest_nr, ovtype),
1264                                 !before ? "enabled" : "disabled");
1265                 return -EINVAL;
1266         }
1267
1268         /* apply the overlay */
1269         ret = of_unittest_apply_overlay(overlay_nr, unittest_nr, &ov_id);
1270         if (ret != 0) {
1271                 /* of_unittest_apply_overlay already called unittest() */
1272                 return ret;
1273         }
1274
1275         /* unittest device must be in after state */
1276         if (of_unittest_device_exists(unittest_nr, ovtype) != after) {
1277                 unittest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n",
1278                                 overlay_path(overlay_nr),
1279                                 unittest_path(unittest_nr, ovtype),
1280                                 !after ? "enabled" : "disabled");
1281                 return -EINVAL;
1282         }
1283
1284         ret = of_overlay_destroy(ov_id);
1285         if (ret != 0) {
1286                 unittest(0, "overlay @\"%s\" failed to be destroyed @\"%s\"\n",
1287                                 overlay_path(overlay_nr),
1288                                 unittest_path(unittest_nr, ovtype));
1289                 return ret;
1290         }
1291
1292         /* unittest device must be again in before state */
1293         if (of_unittest_device_exists(unittest_nr, PDEV_OVERLAY) != before) {
1294                 unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1295                                 overlay_path(overlay_nr),
1296                                 unittest_path(unittest_nr, ovtype),
1297                                 !before ? "enabled" : "disabled");
1298                 return -EINVAL;
1299         }
1300
1301         return 0;
1302 }
1303
1304 /* test activation of device */
1305 static void of_unittest_overlay_0(void)
1306 {
1307         int ret;
1308
1309         /* device should enable */
1310         ret = of_unittest_apply_overlay_check(0, 0, 0, 1, PDEV_OVERLAY);
1311         if (ret != 0)
1312                 return;
1313
1314         unittest(1, "overlay test %d passed\n", 0);
1315 }
1316
1317 /* test deactivation of device */
1318 static void of_unittest_overlay_1(void)
1319 {
1320         int ret;
1321
1322         /* device should disable */
1323         ret = of_unittest_apply_overlay_check(1, 1, 1, 0, PDEV_OVERLAY);
1324         if (ret != 0)
1325                 return;
1326
1327         unittest(1, "overlay test %d passed\n", 1);
1328 }
1329
1330 /* test activation of device */
1331 static void of_unittest_overlay_2(void)
1332 {
1333         int ret;
1334
1335         /* device should enable */
1336         ret = of_unittest_apply_overlay_check(2, 2, 0, 1, PDEV_OVERLAY);
1337         if (ret != 0)
1338                 return;
1339
1340         unittest(1, "overlay test %d passed\n", 2);
1341 }
1342
1343 /* test deactivation of device */
1344 static void of_unittest_overlay_3(void)
1345 {
1346         int ret;
1347
1348         /* device should disable */
1349         ret = of_unittest_apply_overlay_check(3, 3, 1, 0, PDEV_OVERLAY);
1350         if (ret != 0)
1351                 return;
1352
1353         unittest(1, "overlay test %d passed\n", 3);
1354 }
1355
1356 /* test activation of a full device node */
1357 static void of_unittest_overlay_4(void)
1358 {
1359         int ret;
1360
1361         /* device should disable */
1362         ret = of_unittest_apply_overlay_check(4, 4, 0, 1, PDEV_OVERLAY);
1363         if (ret != 0)
1364                 return;
1365
1366         unittest(1, "overlay test %d passed\n", 4);
1367 }
1368
1369 /* test overlay apply/revert sequence */
1370 static void of_unittest_overlay_5(void)
1371 {
1372         int ret;
1373
1374         /* device should disable */
1375         ret = of_unittest_apply_revert_overlay_check(5, 5, 0, 1, PDEV_OVERLAY);
1376         if (ret != 0)
1377                 return;
1378
1379         unittest(1, "overlay test %d passed\n", 5);
1380 }
1381
1382 /* test overlay application in sequence */
1383 static void of_unittest_overlay_6(void)
1384 {
1385         struct device_node *np;
1386         int ret, i, ov_id[2];
1387         int overlay_nr = 6, unittest_nr = 6;
1388         int before = 0, after = 1;
1389
1390         /* unittest device must be in before state */
1391         for (i = 0; i < 2; i++) {
1392                 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
1393                                 != before) {
1394                         unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1395                                         overlay_path(overlay_nr + i),
1396                                         unittest_path(unittest_nr + i,
1397                                                 PDEV_OVERLAY),
1398                                         !before ? "enabled" : "disabled");
1399                         return;
1400                 }
1401         }
1402
1403         /* apply the overlays */
1404         for (i = 0; i < 2; i++) {
1405
1406                 np = of_find_node_by_path(overlay_path(overlay_nr + i));
1407                 if (np == NULL) {
1408                         unittest(0, "could not find overlay node @\"%s\"\n",
1409                                         overlay_path(overlay_nr + i));
1410                         return;
1411                 }
1412
1413                 ret = of_overlay_create(np);
1414                 if (ret < 0)  {
1415                         unittest(0, "could not create overlay from \"%s\"\n",
1416                                         overlay_path(overlay_nr + i));
1417                         return;
1418                 }
1419                 ov_id[i] = ret;
1420                 of_unittest_track_overlay(ov_id[i]);
1421         }
1422
1423         for (i = 0; i < 2; i++) {
1424                 /* unittest device must be in after state */
1425                 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
1426                                 != after) {
1427                         unittest(0, "overlay @\"%s\" failed @\"%s\" %s\n",
1428                                         overlay_path(overlay_nr + i),
1429                                         unittest_path(unittest_nr + i,
1430                                                 PDEV_OVERLAY),
1431                                         !after ? "enabled" : "disabled");
1432                         return;
1433                 }
1434         }
1435
1436         for (i = 1; i >= 0; i--) {
1437                 ret = of_overlay_destroy(ov_id[i]);
1438                 if (ret != 0) {
1439                         unittest(0, "overlay @\"%s\" failed destroy @\"%s\"\n",
1440                                         overlay_path(overlay_nr + i),
1441                                         unittest_path(unittest_nr + i,
1442                                                 PDEV_OVERLAY));
1443                         return;
1444                 }
1445                 of_unittest_untrack_overlay(ov_id[i]);
1446         }
1447
1448         for (i = 0; i < 2; i++) {
1449                 /* unittest device must be again in before state */
1450                 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
1451                                 != before) {
1452                         unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1453                                         overlay_path(overlay_nr + i),
1454                                         unittest_path(unittest_nr + i,
1455                                                 PDEV_OVERLAY),
1456                                         !before ? "enabled" : "disabled");
1457                         return;
1458                 }
1459         }
1460
1461         unittest(1, "overlay test %d passed\n", 6);
1462 }
1463
1464 /* test overlay application in sequence */
1465 static void of_unittest_overlay_8(void)
1466 {
1467         struct device_node *np;
1468         int ret, i, ov_id[2];
1469         int overlay_nr = 8, unittest_nr = 8;
1470
1471         /* we don't care about device state in this test */
1472
1473         /* apply the overlays */
1474         for (i = 0; i < 2; i++) {
1475
1476                 np = of_find_node_by_path(overlay_path(overlay_nr + i));
1477                 if (np == NULL) {
1478                         unittest(0, "could not find overlay node @\"%s\"\n",
1479                                         overlay_path(overlay_nr + i));
1480                         return;
1481                 }
1482
1483                 ret = of_overlay_create(np);
1484                 if (ret < 0)  {
1485                         unittest(0, "could not create overlay from \"%s\"\n",
1486                                         overlay_path(overlay_nr + i));
1487                         return;
1488                 }
1489                 ov_id[i] = ret;
1490                 of_unittest_track_overlay(ov_id[i]);
1491         }
1492
1493         /* now try to remove first overlay (it should fail) */
1494         ret = of_overlay_destroy(ov_id[0]);
1495         if (ret == 0) {
1496                 unittest(0, "overlay @\"%s\" was destroyed @\"%s\"\n",
1497                                 overlay_path(overlay_nr + 0),
1498                                 unittest_path(unittest_nr,
1499                                         PDEV_OVERLAY));
1500                 return;
1501         }
1502
1503         /* removing them in order should work */
1504         for (i = 1; i >= 0; i--) {
1505                 ret = of_overlay_destroy(ov_id[i]);
1506                 if (ret != 0) {
1507                         unittest(0, "overlay @\"%s\" not destroyed @\"%s\"\n",
1508                                         overlay_path(overlay_nr + i),
1509                                         unittest_path(unittest_nr,
1510                                                 PDEV_OVERLAY));
1511                         return;
1512                 }
1513                 of_unittest_untrack_overlay(ov_id[i]);
1514         }
1515
1516         unittest(1, "overlay test %d passed\n", 8);
1517 }
1518
1519 /* test insertion of a bus with parent devices */
1520 static void of_unittest_overlay_10(void)
1521 {
1522         int ret;
1523         char *child_path;
1524
1525         /* device should disable */
1526         ret = of_unittest_apply_overlay_check(10, 10, 0, 1, PDEV_OVERLAY);
1527         if (unittest(ret == 0,
1528                         "overlay test %d failed; overlay application\n", 10))
1529                 return;
1530
1531         child_path = kasprintf(GFP_KERNEL, "%s/test-unittest101",
1532                         unittest_path(10, PDEV_OVERLAY));
1533         if (unittest(child_path, "overlay test %d failed; kasprintf\n", 10))
1534                 return;
1535
1536         ret = of_path_device_type_exists(child_path, PDEV_OVERLAY);
1537         kfree(child_path);
1538         if (unittest(ret, "overlay test %d failed; no child device\n", 10))
1539                 return;
1540 }
1541
1542 /* test insertion of a bus with parent devices (and revert) */
1543 static void of_unittest_overlay_11(void)
1544 {
1545         int ret;
1546
1547         /* device should disable */
1548         ret = of_unittest_apply_revert_overlay_check(11, 11, 0, 1,
1549                         PDEV_OVERLAY);
1550         if (unittest(ret == 0,
1551                         "overlay test %d failed; overlay application\n", 11))
1552                 return;
1553 }
1554
1555 #if IS_BUILTIN(CONFIG_I2C) && IS_ENABLED(CONFIG_OF_OVERLAY)
1556
1557 struct unittest_i2c_bus_data {
1558         struct platform_device  *pdev;
1559         struct i2c_adapter      adap;
1560 };
1561
1562 static int unittest_i2c_master_xfer(struct i2c_adapter *adap,
1563                 struct i2c_msg *msgs, int num)
1564 {
1565         struct unittest_i2c_bus_data *std = i2c_get_adapdata(adap);
1566
1567         (void)std;
1568
1569         return num;
1570 }
1571
1572 static u32 unittest_i2c_functionality(struct i2c_adapter *adap)
1573 {
1574         return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
1575 }
1576
1577 static const struct i2c_algorithm unittest_i2c_algo = {
1578         .master_xfer    = unittest_i2c_master_xfer,
1579         .functionality  = unittest_i2c_functionality,
1580 };
1581
1582 static int unittest_i2c_bus_probe(struct platform_device *pdev)
1583 {
1584         struct device *dev = &pdev->dev;
1585         struct device_node *np = dev->of_node;
1586         struct unittest_i2c_bus_data *std;
1587         struct i2c_adapter *adap;
1588         int ret;
1589
1590         if (np == NULL) {
1591                 dev_err(dev, "No OF data for device\n");
1592                 return -EINVAL;
1593
1594         }
1595
1596         dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1597
1598         std = devm_kzalloc(dev, sizeof(*std), GFP_KERNEL);
1599         if (!std) {
1600                 dev_err(dev, "Failed to allocate unittest i2c data\n");
1601                 return -ENOMEM;
1602         }
1603
1604         /* link them together */
1605         std->pdev = pdev;
1606         platform_set_drvdata(pdev, std);
1607
1608         adap = &std->adap;
1609         i2c_set_adapdata(adap, std);
1610         adap->nr = -1;
1611         strlcpy(adap->name, pdev->name, sizeof(adap->name));
1612         adap->class = I2C_CLASS_DEPRECATED;
1613         adap->algo = &unittest_i2c_algo;
1614         adap->dev.parent = dev;
1615         adap->dev.of_node = dev->of_node;
1616         adap->timeout = 5 * HZ;
1617         adap->retries = 3;
1618
1619         ret = i2c_add_numbered_adapter(adap);
1620         if (ret != 0) {
1621                 dev_err(dev, "Failed to add I2C adapter\n");
1622                 return ret;
1623         }
1624
1625         return 0;
1626 }
1627
1628 static int unittest_i2c_bus_remove(struct platform_device *pdev)
1629 {
1630         struct device *dev = &pdev->dev;
1631         struct device_node *np = dev->of_node;
1632         struct unittest_i2c_bus_data *std = platform_get_drvdata(pdev);
1633
1634         dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1635         i2c_del_adapter(&std->adap);
1636
1637         return 0;
1638 }
1639
1640 static const struct of_device_id unittest_i2c_bus_match[] = {
1641         { .compatible = "unittest-i2c-bus", },
1642         {},
1643 };
1644
1645 static struct platform_driver unittest_i2c_bus_driver = {
1646         .probe                  = unittest_i2c_bus_probe,
1647         .remove                 = unittest_i2c_bus_remove,
1648         .driver = {
1649                 .name           = "unittest-i2c-bus",
1650                 .of_match_table = of_match_ptr(unittest_i2c_bus_match),
1651         },
1652 };
1653
1654 static int unittest_i2c_dev_probe(struct i2c_client *client,
1655                 const struct i2c_device_id *id)
1656 {
1657         struct device *dev = &client->dev;
1658         struct device_node *np = client->dev.of_node;
1659
1660         if (!np) {
1661                 dev_err(dev, "No OF node\n");
1662                 return -EINVAL;
1663         }
1664
1665         dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1666
1667         return 0;
1668 };
1669
1670 static int unittest_i2c_dev_remove(struct i2c_client *client)
1671 {
1672         struct device *dev = &client->dev;
1673         struct device_node *np = client->dev.of_node;
1674
1675         dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1676         return 0;
1677 }
1678
1679 static const struct i2c_device_id unittest_i2c_dev_id[] = {
1680         { .name = "unittest-i2c-dev" },
1681         { }
1682 };
1683
1684 static struct i2c_driver unittest_i2c_dev_driver = {
1685         .driver = {
1686                 .name = "unittest-i2c-dev",
1687         },
1688         .probe = unittest_i2c_dev_probe,
1689         .remove = unittest_i2c_dev_remove,
1690         .id_table = unittest_i2c_dev_id,
1691 };
1692
1693 #if IS_BUILTIN(CONFIG_I2C_MUX)
1694
1695 struct unittest_i2c_mux_data {
1696         int nchans;
1697         struct i2c_adapter *adap[];
1698 };
1699
1700 static int unittest_i2c_mux_select_chan(struct i2c_adapter *adap,
1701                                void *client, u32 chan)
1702 {
1703         return 0;
1704 }
1705
1706 static int unittest_i2c_mux_probe(struct i2c_client *client,
1707                 const struct i2c_device_id *id)
1708 {
1709         int ret, i, nchans, size;
1710         struct device *dev = &client->dev;
1711         struct i2c_adapter *adap = to_i2c_adapter(dev->parent);
1712         struct device_node *np = client->dev.of_node, *child;
1713         struct unittest_i2c_mux_data *stm;
1714         u32 reg, max_reg;
1715
1716         dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1717
1718         if (!np) {
1719                 dev_err(dev, "No OF node\n");
1720                 return -EINVAL;
1721         }
1722
1723         max_reg = (u32)-1;
1724         for_each_child_of_node(np, child) {
1725                 ret = of_property_read_u32(child, "reg", &reg);
1726                 if (ret)
1727                         continue;
1728                 if (max_reg == (u32)-1 || reg > max_reg)
1729                         max_reg = reg;
1730         }
1731         nchans = max_reg == (u32)-1 ? 0 : max_reg + 1;
1732         if (nchans == 0) {
1733                 dev_err(dev, "No channels\n");
1734                 return -EINVAL;
1735         }
1736
1737         size = offsetof(struct unittest_i2c_mux_data, adap[nchans]);
1738         stm = devm_kzalloc(dev, size, GFP_KERNEL);
1739         if (!stm) {
1740                 dev_err(dev, "Out of memory\n");
1741                 return -ENOMEM;
1742         }
1743         stm->nchans = nchans;
1744         for (i = 0; i < nchans; i++) {
1745                 stm->adap[i] = i2c_add_mux_adapter(adap, dev, client,
1746                                 0, i, 0, unittest_i2c_mux_select_chan, NULL);
1747                 if (!stm->adap[i]) {
1748                         dev_err(dev, "Failed to register mux #%d\n", i);
1749                         for (i--; i >= 0; i--)
1750                                 i2c_del_mux_adapter(stm->adap[i]);
1751                         return -ENODEV;
1752                 }
1753         }
1754
1755         i2c_set_clientdata(client, stm);
1756
1757         return 0;
1758 };
1759
1760 static int unittest_i2c_mux_remove(struct i2c_client *client)
1761 {
1762         struct device *dev = &client->dev;
1763         struct device_node *np = client->dev.of_node;
1764         struct unittest_i2c_mux_data *stm = i2c_get_clientdata(client);
1765         int i;
1766
1767         dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1768         for (i = stm->nchans - 1; i >= 0; i--)
1769                 i2c_del_mux_adapter(stm->adap[i]);
1770         return 0;
1771 }
1772
1773 static const struct i2c_device_id unittest_i2c_mux_id[] = {
1774         { .name = "unittest-i2c-mux" },
1775         { }
1776 };
1777
1778 static struct i2c_driver unittest_i2c_mux_driver = {
1779         .driver = {
1780                 .name = "unittest-i2c-mux",
1781         },
1782         .probe = unittest_i2c_mux_probe,
1783         .remove = unittest_i2c_mux_remove,
1784         .id_table = unittest_i2c_mux_id,
1785 };
1786
1787 #endif
1788
1789 static int of_unittest_overlay_i2c_init(void)
1790 {
1791         int ret;
1792
1793         ret = i2c_add_driver(&unittest_i2c_dev_driver);
1794         if (unittest(ret == 0,
1795                         "could not register unittest i2c device driver\n"))
1796                 return ret;
1797
1798         ret = platform_driver_register(&unittest_i2c_bus_driver);
1799         if (unittest(ret == 0,
1800                         "could not register unittest i2c bus driver\n"))
1801                 return ret;
1802
1803 #if IS_BUILTIN(CONFIG_I2C_MUX)
1804         ret = i2c_add_driver(&unittest_i2c_mux_driver);
1805         if (unittest(ret == 0,
1806                         "could not register unittest i2c mux driver\n"))
1807                 return ret;
1808 #endif
1809
1810         return 0;
1811 }
1812
1813 static void of_unittest_overlay_i2c_cleanup(void)
1814 {
1815 #if IS_BUILTIN(CONFIG_I2C_MUX)
1816         i2c_del_driver(&unittest_i2c_mux_driver);
1817 #endif
1818         platform_driver_unregister(&unittest_i2c_bus_driver);
1819         i2c_del_driver(&unittest_i2c_dev_driver);
1820 }
1821
1822 static void of_unittest_overlay_i2c_12(void)
1823 {
1824         int ret;
1825
1826         /* device should enable */
1827         ret = of_unittest_apply_overlay_check(12, 12, 0, 1, I2C_OVERLAY);
1828         if (ret != 0)
1829                 return;
1830
1831         unittest(1, "overlay test %d passed\n", 12);
1832 }
1833
1834 /* test deactivation of device */
1835 static void of_unittest_overlay_i2c_13(void)
1836 {
1837         int ret;
1838
1839         /* device should disable */
1840         ret = of_unittest_apply_overlay_check(13, 13, 1, 0, I2C_OVERLAY);
1841         if (ret != 0)
1842                 return;
1843
1844         unittest(1, "overlay test %d passed\n", 13);
1845 }
1846
1847 /* just check for i2c mux existence */
1848 static void of_unittest_overlay_i2c_14(void)
1849 {
1850 }
1851
1852 static void of_unittest_overlay_i2c_15(void)
1853 {
1854         int ret;
1855
1856         /* device should enable */
1857         ret = of_unittest_apply_overlay_check(16, 15, 0, 1, I2C_OVERLAY);
1858         if (ret != 0)
1859                 return;
1860
1861         unittest(1, "overlay test %d passed\n", 15);
1862 }
1863
1864 #else
1865
1866 static inline void of_unittest_overlay_i2c_14(void) { }
1867 static inline void of_unittest_overlay_i2c_15(void) { }
1868
1869 #endif
1870
1871 static void __init of_unittest_overlay(void)
1872 {
1873         struct device_node *bus_np = NULL;
1874         int ret;
1875
1876         ret = platform_driver_register(&unittest_driver);
1877         if (ret != 0) {
1878                 unittest(0, "could not register unittest driver\n");
1879                 goto out;
1880         }
1881
1882         bus_np = of_find_node_by_path(bus_path);
1883         if (bus_np == NULL) {
1884                 unittest(0, "could not find bus_path \"%s\"\n", bus_path);
1885                 goto out;
1886         }
1887
1888         ret = of_platform_populate(bus_np, of_default_bus_match_table,
1889                         NULL, NULL);
1890         if (ret != 0) {
1891                 unittest(0, "could not populate bus @ \"%s\"\n", bus_path);
1892                 goto out;
1893         }
1894
1895         if (!of_unittest_device_exists(100, PDEV_OVERLAY)) {
1896                 unittest(0, "could not find unittest0 @ \"%s\"\n",
1897                                 unittest_path(100, PDEV_OVERLAY));
1898                 goto out;
1899         }
1900
1901         if (of_unittest_device_exists(101, PDEV_OVERLAY)) {
1902                 unittest(0, "unittest1 @ \"%s\" should not exist\n",
1903                                 unittest_path(101, PDEV_OVERLAY));
1904                 goto out;
1905         }
1906
1907         unittest(1, "basic infrastructure of overlays passed");
1908
1909         /* tests in sequence */
1910         of_unittest_overlay_0();
1911         of_unittest_overlay_1();
1912         of_unittest_overlay_2();
1913         of_unittest_overlay_3();
1914         of_unittest_overlay_4();
1915         of_unittest_overlay_5();
1916         of_unittest_overlay_6();
1917         of_unittest_overlay_8();
1918
1919         of_unittest_overlay_10();
1920         of_unittest_overlay_11();
1921
1922 #if IS_BUILTIN(CONFIG_I2C)
1923         if (unittest(of_unittest_overlay_i2c_init() == 0, "i2c init failed\n"))
1924                 goto out;
1925
1926         of_unittest_overlay_i2c_12();
1927         of_unittest_overlay_i2c_13();
1928         of_unittest_overlay_i2c_14();
1929         of_unittest_overlay_i2c_15();
1930
1931         of_unittest_overlay_i2c_cleanup();
1932 #endif
1933
1934         of_unittest_destroy_tracked_overlays();
1935
1936 out:
1937         of_node_put(bus_np);
1938 }
1939
1940 #else
1941 static inline void __init of_unittest_overlay(void) { }
1942 #endif
1943
1944 static int __init of_unittest(void)
1945 {
1946         struct device_node *np;
1947         int res;
1948
1949         /* adding data for unittest */
1950         res = unittest_data_add();
1951         if (res)
1952                 return res;
1953         if (!of_aliases)
1954                 of_aliases = of_find_node_by_path("/aliases");
1955
1956         np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
1957         if (!np) {
1958                 pr_info("No testcase data in device tree; not running tests\n");
1959                 return 0;
1960         }
1961         of_node_put(np);
1962
1963         pr_info("start of unittest - you will see error messages\n");
1964         of_unittest_check_tree_linkage();
1965         of_unittest_check_phandles();
1966         of_unittest_find_node_by_name();
1967         of_unittest_dynamic();
1968         of_unittest_parse_phandle_with_args();
1969         of_unittest_property_string();
1970         of_unittest_property_copy();
1971         of_unittest_changeset();
1972         of_unittest_parse_interrupts();
1973         of_unittest_parse_interrupts_extended();
1974         of_unittest_match_node();
1975         of_unittest_platform_populate();
1976         of_unittest_overlay();
1977
1978         /* Double check linkage after removing testcase data */
1979         of_unittest_check_tree_linkage();
1980
1981         pr_info("end of unittest - %i passed, %i failed\n",
1982                 unittest_results.passed, unittest_results.failed);
1983
1984         return 0;
1985 }
1986 late_initcall(of_unittest);