kernel/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         mutex_lock(&of_mutex);
 534         unittest(!of_changeset_apply(&chgset), "apply failed\n");
 535         mutex_unlock(&of_mutex);
 536
 537         /* Make sure node names are constructed correctly */
 538         unittest((np = of_find_node_by_path("/testcase-data/changeset/n2/n21")),
 539                  "'%s' not added\n", n21->full_name);
 540         of_node_put(np);
 541
 542         mutex_lock(&of_mutex);
 543         unittest(!of_changeset_revert(&chgset), "revert failed\n");
 544         mutex_unlock(&of_mutex);
 545
 546         of_changeset_destroy(&chgset);
 547 #endif
 548 }
 549
 550 static void __init of_unittest_parse_interrupts(void)
 551 {
 552         struct device_node *np;
 553         struct of_phandle_args args;
 554         int i, rc;
 555
 556         np = of_find_node_by_path("/testcase-data/interrupts/interrupts0");
 557         if (!np) {
 558                 pr_err("missing testcase data\n");
 559                 return;
 560         }
 561
 562         for (i = 0; i < 4; i++) {
 563                 bool passed = true;
 564
 565                 args.args_count = 0;
 566                 rc = of_irq_parse_one(np, i, &args);
 567
 568                 passed &= !rc;
 569                 passed &= (args.args_count == 1);
 570                 passed &= (args.args[0] == (i + 1));
 571
 572                 unittest(passed, "index %i - data error on node %s rc=%i\n",
 573                          i, args.np->full_name, rc);
 574         }
 575         of_node_put(np);
 576
 577         np = of_find_node_by_path("/testcase-data/interrupts/interrupts1");
 578         if (!np) {
 579                 pr_err("missing testcase data\n");
 580                 return;
 581         }
 582
 583         for (i = 0; i < 4; i++) {
 584                 bool passed = true;
 585
 586                 args.args_count = 0;
 587                 rc = of_irq_parse_one(np, i, &args);
 588
 589                 /* Test the values from tests-phandle.dtsi */
 590                 switch (i) {
 591                 case 0:
 592                         passed &= !rc;
 593                         passed &= (args.args_count == 1);
 594                         passed &= (args.args[0] == 9);
 595                         break;
 596                 case 1:
 597                         passed &= !rc;
 598                         passed &= (args.args_count == 3);
 599                         passed &= (args.args[0] == 10);
 600                         passed &= (args.args[1] == 11);
 601                         passed &= (args.args[2] == 12);
 602                         break;
 603                 case 2:
 604                         passed &= !rc;
 605                         passed &= (args.args_count == 2);
 606                         passed &= (args.args[0] == 13);
 607                         passed &= (args.args[1] == 14);
 608                         break;
 609                 case 3:
 610                         passed &= !rc;
 611                         passed &= (args.args_count == 2);
 612                         passed &= (args.args[0] == 15);
 613                         passed &= (args.args[1] == 16);
 614                         break;
 615                 default:
 616                         passed = false;
 617                 }
 618                 unittest(passed, "index %i - data error on node %s rc=%i\n",
 619                          i, args.np->full_name, rc);
 620         }
 621         of_node_put(np);
 622 }
 623
 624 static void __init of_unittest_parse_interrupts_extended(void)
 625 {
 626         struct device_node *np;
 627         struct of_phandle_args args;
 628         int i, rc;
 629
 630         np = of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0");
 631         if (!np) {
 632                 pr_err("missing testcase data\n");
 633                 return;
 634         }
 635
 636         for (i = 0; i < 7; i++) {
 637                 bool passed = true;
 638
 639                 rc = of_irq_parse_one(np, i, &args);
 640
 641                 /* Test the values from tests-phandle.dtsi */
 642                 switch (i) {
 643                 case 0:
 644                         passed &= !rc;
 645                         passed &= (args.args_count == 1);
 646                         passed &= (args.args[0] == 1);
 647                         break;
 648                 case 1:
 649                         passed &= !rc;
 650                         passed &= (args.args_count == 3);
 651                         passed &= (args.args[0] == 2);
 652                         passed &= (args.args[1] == 3);
 653                         passed &= (args.args[2] == 4);
 654                         break;
 655                 case 2:
 656                         passed &= !rc;
 657                         passed &= (args.args_count == 2);
 658                         passed &= (args.args[0] == 5);
 659                         passed &= (args.args[1] == 6);
 660                         break;
 661                 case 3:
 662                         passed &= !rc;
 663                         passed &= (args.args_count == 1);
 664                         passed &= (args.args[0] == 9);
 665                         break;
 666                 case 4:
 667                         passed &= !rc;
 668                         passed &= (args.args_count == 3);
 669                         passed &= (args.args[0] == 10);
 670                         passed &= (args.args[1] == 11);
 671                         passed &= (args.args[2] == 12);
 672                         break;
 673                 case 5:
 674                         passed &= !rc;
 675                         passed &= (args.args_count == 2);
 676                         passed &= (args.args[0] == 13);
 677                         passed &= (args.args[1] == 14);
 678                         break;
 679                 case 6:
 680                         passed &= !rc;
 681                         passed &= (args.args_count == 1);
 682                         passed &= (args.args[0] == 15);
 683                         break;
 684                 default:
 685                         passed = false;
 686                 }
 687
 688                 unittest(passed, "index %i - data error on node %s rc=%i\n",
 689                          i, args.np->full_name, rc);
 690         }
 691         of_node_put(np);
 692 }
 693
 694 static const struct of_device_id match_node_table[] = {
 695         { .data = "A", .name = "name0", }, /* Name alone is lowest priority */
 696         { .data = "B", .type = "type1", }, /* followed by type alone */
 697
 698         { .data = "Ca", .name = "name2", .type = "type1", }, /* followed by both together */
 699         { .data = "Cb", .name = "name2", }, /* Only match when type doesn't match */
 700         { .data = "Cc", .name = "name2", .type = "type2", },
 701
 702         { .data = "E", .compatible = "compat3" },
 703         { .data = "G", .compatible = "compat2", },
 704         { .data = "H", .compatible = "compat2", .name = "name5", },
 705         { .data = "I", .compatible = "compat2", .type = "type1", },
 706         { .data = "J", .compatible = "compat2", .type = "type1", .name = "name8", },
 707         { .data = "K", .compatible = "compat2", .name = "name9", },
 708         {}
 709 };
 710
 711 static struct {
 712         const char *path;
 713         const char *data;
 714 } match_node_tests[] = {
 715         { .path = "/testcase-data/match-node/name0", .data = "A", },
 716         { .path = "/testcase-data/match-node/name1", .data = "B", },
 717         { .path = "/testcase-data/match-node/a/name2", .data = "Ca", },
 718         { .path = "/testcase-data/match-node/b/name2", .data = "Cb", },
 719         { .path = "/testcase-data/match-node/c/name2", .data = "Cc", },
 720         { .path = "/testcase-data/match-node/name3", .data = "E", },
 721         { .path = "/testcase-data/match-node/name4", .data = "G", },
 722         { .path = "/testcase-data/match-node/name5", .data = "H", },
 723         { .path = "/testcase-data/match-node/name6", .data = "G", },
 724         { .path = "/testcase-data/match-node/name7", .data = "I", },
 725         { .path = "/testcase-data/match-node/name8", .data = "J", },
 726         { .path = "/testcase-data/match-node/name9", .data = "K", },
 727 };
 728
 729 static void __init of_unittest_match_node(void)
 730 {
 731         struct device_node *np;
 732         const struct of_device_id *match;
 733         int i;
 734
 735         for (i = 0; i < ARRAY_SIZE(match_node_tests); i++) {
 736                 np = of_find_node_by_path(match_node_tests[i].path);
 737                 if (!np) {
 738                         unittest(0, "missing testcase node %s\n",
 739                                 match_node_tests[i].path);
 740                         continue;
 741                 }
 742
 743                 match = of_match_node(match_node_table, np);
 744                 if (!match) {
 745                         unittest(0, "%s didn't match anything\n",
 746                                 match_node_tests[i].path);
 747                         continue;
 748                 }
 749
 750                 if (strcmp(match->data, match_node_tests[i].data) != 0) {
 751                         unittest(0, "%s got wrong match. expected %s, got %s\n",
 752                                 match_node_tests[i].path, match_node_tests[i].data,
 753                                 (const char *)match->data);
 754                         continue;
 755                 }
 756                 unittest(1, "passed");
 757         }
 758 }
 759
 760 static const struct platform_device_info test_bus_info = {
 761         .name = "unittest-bus",
 762 };
 763 static void __init of_unittest_platform_populate(void)
 764 {
 765         int irq, rc;
 766         struct device_node *np, *child, *grandchild;
 767         struct platform_device *pdev, *test_bus;
 768         const struct of_device_id match[] = {
 769                 { .compatible = "test-device", },
 770                 {}
 771         };
 772
 773         np = of_find_node_by_path("/testcase-data");
 774         of_platform_populate(np, of_default_bus_match_table, NULL, NULL);
 775
 776         /* Test that a missing irq domain returns -EPROBE_DEFER */
 777         np = of_find_node_by_path("/testcase-data/testcase-device1");
 778         pdev = of_find_device_by_node(np);
 779         unittest(pdev, "device 1 creation failed\n");
 780
 781         irq = platform_get_irq(pdev, 0);
 782         unittest(irq == -EPROBE_DEFER, "device deferred probe failed - %d\n", irq);
 783
 784         /* Test that a parsing failure does not return -EPROBE_DEFER */
 785         np = of_find_node_by_path("/testcase-data/testcase-device2");
 786         pdev = of_find_device_by_node(np);
 787         unittest(pdev, "device 2 creation failed\n");
 788         irq = platform_get_irq(pdev, 0);
 789         unittest(irq < 0 && irq != -EPROBE_DEFER, "device parsing error failed - %d\n", irq);
 790
 791         np = of_find_node_by_path("/testcase-data/platform-tests");
 792         unittest(np, "No testcase data in device tree\n");
 793         if (!np)
 794                 return;
 795
 796         test_bus = platform_device_register_full(&test_bus_info);
 797         rc = PTR_ERR_OR_ZERO(test_bus);
 798         unittest(!rc, "testbus registration failed; rc=%i\n", rc);
 799         if (rc)
 800                 return;
 801         test_bus->dev.of_node = np;
 802
 803         of_platform_populate(np, match, NULL, &test_bus->dev);
 804         for_each_child_of_node(np, child) {
 805                 for_each_child_of_node(child, grandchild)
 806                         unittest(of_find_device_by_node(grandchild),
 807                                  "Could not create device for node '%s'\n",
 808                                  grandchild->name);
 809         }
 810
 811         of_platform_depopulate(&test_bus->dev);
 812         for_each_child_of_node(np, child) {
 813                 for_each_child_of_node(child, grandchild)
 814                         unittest(!of_find_device_by_node(grandchild),
 815                                  "device didn't get destroyed '%s'\n",
 816                                  grandchild->name);
 817         }
 818
 819         platform_device_unregister(test_bus);
 820         of_node_put(np);
 821 }
 822
 823 /**
 824  *      update_node_properties - adds the properties
 825  *      of np into dup node (present in live tree) and
 826  *      updates parent of children of np to dup.
 827  *
 828  *      @np:    node already present in live tree
 829  *      @dup:   node present in live tree to be updated
 830  */
 831 static void update_node_properties(struct device_node *np,
 832                                         struct device_node *dup)
 833 {
 834         struct property *prop;
 835         struct device_node *child;
 836
 837         for_each_property_of_node(np, prop)
 838                 of_add_property(dup, prop);
 839
 840         for_each_child_of_node(np, child)
 841                 child->parent = dup;
 842 }
 843
 844 /**
 845  *      attach_node_and_children - attaches nodes
 846  *      and its children to live tree
 847  *
 848  *      @np:    Node to attach to live tree
 849  */
 850 static int attach_node_and_children(struct device_node *np)
 851 {
 852         struct device_node *next, *dup, *child;
 853         unsigned long flags;
 854
 855         dup = of_find_node_by_path(np->full_name);
 856         if (dup) {
 857                 update_node_properties(np, dup);
 858                 return 0;
 859         }
 860
 861         child = np->child;
 862         np->child = NULL;
 863
 864         mutex_lock(&of_mutex);
 865         raw_spin_lock_irqsave(&devtree_lock, flags);
 866         np->sibling = np->parent->child;
 867         np->parent->child = np;
 868         of_node_clear_flag(np, OF_DETACHED);
 869         raw_spin_unlock_irqrestore(&devtree_lock, flags);
 870
 871         __of_attach_node_sysfs(np);
 872         mutex_unlock(&of_mutex);
 873
 874         while (child) {
 875                 next = child->sibling;
 876                 attach_node_and_children(child);
 877                 child = next;
 878         }
 879
 880         return 0;
 881 }
 882
 883 /**
 884  *      unittest_data_add - Reads, copies data from
 885  *      linked tree and attaches it to the live tree
 886  */
 887 static int __init unittest_data_add(void)
 888 {
 889         void *unittest_data;
 890         struct device_node *unittest_data_node, *np;
 891         /*
 892          * __dtb_testcases_begin[] and __dtb_testcases_end[] are magically
 893          * created by cmd_dt_S_dtb in scripts/Makefile.lib
 894          */
 895         extern uint8_t __dtb_testcases_begin[];
 896         extern uint8_t __dtb_testcases_end[];
 897         const int size = __dtb_testcases_end - __dtb_testcases_begin;
 898         int rc;
 899
 900         if (!size) {
 901                 pr_warn("%s: No testcase data to attach; not running tests\n",
 902                         __func__);
 903                 return -ENODATA;
 904         }
 905
 906         /* creating copy */
 907         unittest_data = kmemdup(__dtb_testcases_begin, size, GFP_KERNEL);
 908
 909         if (!unittest_data) {
 910                 pr_warn("%s: Failed to allocate memory for unittest_data; "
 911                         "not running tests\n", __func__);
 912                 return -ENOMEM;
 913         }
 914         of_fdt_unflatten_tree(unittest_data, &unittest_data_node);
 915         if (!unittest_data_node) {
 916                 pr_warn("%s: No tree to attach; not running tests\n", __func__);
 917                 return -ENODATA;
 918         }
 919         of_node_set_flag(unittest_data_node, OF_DETACHED);
 920         rc = of_resolve_phandles(unittest_data_node);
 921         if (rc) {
 922                 pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__, rc);
 923                 return -EINVAL;
 924         }
 925
 926         if (!of_root) {
 927                 of_root = unittest_data_node;
 928                 for_each_of_allnodes(np)
 929                         __of_attach_node_sysfs(np);
 930                 of_aliases = of_find_node_by_path("/aliases");
 931                 of_chosen = of_find_node_by_path("/chosen");
 932                 return 0;
 933         }
 934
 935         /* attach the sub-tree to live tree */
 936         np = unittest_data_node->child;
 937         while (np) {
 938                 struct device_node *next = np->sibling;
 939
 940                 np->parent = of_root;
 941                 attach_node_and_children(np);
 942                 np = next;
 943         }
 944         return 0;
 945 }
 946
 947 #ifdef CONFIG_OF_OVERLAY
 948
 949 static int unittest_probe(struct platform_device *pdev)
 950 {
 951         struct device *dev = &pdev->dev;
 952         struct device_node *np = dev->of_node;
 953
 954         if (np == NULL) {
 955                 dev_err(dev, "No OF data for device\n");
 956                 return -EINVAL;
 957
 958         }
 959
 960         dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
 961
 962         of_platform_populate(np, NULL, NULL, &pdev->dev);
 963
 964         return 0;
 965 }
 966
 967 static int unittest_remove(struct platform_device *pdev)
 968 {
 969         struct device *dev = &pdev->dev;
 970         struct device_node *np = dev->of_node;
 971
 972         dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
 973         return 0;
 974 }
 975
 976 static const struct of_device_id unittest_match[] = {
 977         { .compatible = "unittest", },
 978         {},
 979 };
 980
 981 static struct platform_driver unittest_driver = {
 982         .probe                  = unittest_probe,
 983         .remove                 = unittest_remove,
 984         .driver = {
 985                 .name           = "unittest",
 986                 .of_match_table = of_match_ptr(unittest_match),
 987         },
 988 };
 989
 990 /* get the platform device instantiated at the path */
 991 static struct platform_device *of_path_to_platform_device(const char *path)
 992 {
 993         struct device_node *np;
 994         struct platform_device *pdev;
 995
 996         np = of_find_node_by_path(path);
 997         if (np == NULL)
 998                 return NULL;
 999
1000         pdev = of_find_device_by_node(np);
1001         of_node_put(np);
1002
1003         return pdev;
1004 }
1005
1006 /* find out if a platform device exists at that path */
1007 static int of_path_platform_device_exists(const char *path)
1008 {
1009         struct platform_device *pdev;
1010
1011         pdev = of_path_to_platform_device(path);
1012         platform_device_put(pdev);
1013         return pdev != NULL;
1014 }
1015
1016 #if IS_BUILTIN(CONFIG_I2C)
1017
1018 /* get the i2c client device instantiated at the path */
1019 static struct i2c_client *of_path_to_i2c_client(const char *path)
1020 {
1021         struct device_node *np;
1022         struct i2c_client *client;
1023
1024         np = of_find_node_by_path(path);
1025         if (np == NULL)
1026                 return NULL;
1027
1028         client = of_find_i2c_device_by_node(np);
1029         of_node_put(np);
1030
1031         return client;
1032 }
1033
1034 /* find out if a i2c client device exists at that path */
1035 static int of_path_i2c_client_exists(const char *path)
1036 {
1037         struct i2c_client *client;
1038
1039         client = of_path_to_i2c_client(path);
1040         if (client)
1041                 put_device(&client->dev);
1042         return client != NULL;
1043 }
1044 #else
1045 static int of_path_i2c_client_exists(const char *path)
1046 {
1047         return 0;
1048 }
1049 #endif
1050
1051 enum overlay_type {
1052         PDEV_OVERLAY,
1053         I2C_OVERLAY
1054 };
1055
1056 static int of_path_device_type_exists(const char *path,
1057                 enum overlay_type ovtype)
1058 {
1059         switch (ovtype) {
1060         case PDEV_OVERLAY:
1061                 return of_path_platform_device_exists(path);
1062         case I2C_OVERLAY:
1063                 return of_path_i2c_client_exists(path);
1064         }
1065         return 0;
1066 }
1067
1068 static const char *unittest_path(int nr, enum overlay_type ovtype)
1069 {
1070         const char *base;
1071         static char buf[256];
1072
1073         switch (ovtype) {
1074         case PDEV_OVERLAY:
1075                 base = "/testcase-data/overlay-node/test-bus";
1076                 break;
1077         case I2C_OVERLAY:
1078                 base = "/testcase-data/overlay-node/test-bus/i2c-test-bus";
1079                 break;
1080         default:
1081                 buf[0] = '\0';
1082                 return buf;
1083         }
1084         snprintf(buf, sizeof(buf) - 1, "%s/test-unittest%d", base, nr);
1085         buf[sizeof(buf) - 1] = '\0';
1086         return buf;
1087 }
1088
1089 static int of_unittest_device_exists(int unittest_nr, enum overlay_type ovtype)
1090 {
1091         const char *path;
1092
1093         path = unittest_path(unittest_nr, ovtype);
1094
1095         switch (ovtype) {
1096         case PDEV_OVERLAY:
1097                 return of_path_platform_device_exists(path);
1098         case I2C_OVERLAY:
1099                 return of_path_i2c_client_exists(path);
1100         }
1101         return 0;
1102 }
1103
1104 static const char *overlay_path(int nr)
1105 {
1106         static char buf[256];
1107
1108         snprintf(buf, sizeof(buf) - 1,
1109                 "/testcase-data/overlay%d", nr);
1110         buf[sizeof(buf) - 1] = '\0';
1111
1112         return buf;
1113 }
1114
1115 static const char *bus_path = "/testcase-data/overlay-node/test-bus";
1116
1117 /* it is guaranteed that overlay ids are assigned in sequence */
1118 #define MAX_UNITTEST_OVERLAYS   256
1119 static unsigned long overlay_id_bits[BITS_TO_LONGS(MAX_UNITTEST_OVERLAYS)];
1120 static int overlay_first_id = -1;
1121
1122 static void of_unittest_track_overlay(int id)
1123 {
1124         if (overlay_first_id < 0)
1125                 overlay_first_id = id;
1126         id -= overlay_first_id;
1127
1128         /* we shouldn't need that many */
1129         BUG_ON(id >= MAX_UNITTEST_OVERLAYS);
1130         overlay_id_bits[BIT_WORD(id)] |= BIT_MASK(id);
1131 }
1132
1133 static void of_unittest_untrack_overlay(int id)
1134 {
1135         if (overlay_first_id < 0)
1136                 return;
1137         id -= overlay_first_id;
1138         BUG_ON(id >= MAX_UNITTEST_OVERLAYS);
1139         overlay_id_bits[BIT_WORD(id)] &= ~BIT_MASK(id);
1140 }
1141
1142 static void of_unittest_destroy_tracked_overlays(void)
1143 {
1144         int id, ret, defers;
1145
1146         if (overlay_first_id < 0)
1147                 return;
1148
1149         /* try until no defers */
1150         do {
1151                 defers = 0;
1152                 /* remove in reverse order */
1153                 for (id = MAX_UNITTEST_OVERLAYS - 1; id >= 0; id--) {
1154                         if (!(overlay_id_bits[BIT_WORD(id)] & BIT_MASK(id)))
1155                                 continue;
1156
1157                         ret = of_overlay_destroy(id + overlay_first_id);
1158                         if (ret != 0) {
1159                                 defers++;
1160                                 pr_warn("%s: overlay destroy failed for #%d\n",
1161                                         __func__, id + overlay_first_id);
1162                                 continue;
1163                         }
1164
1165                         overlay_id_bits[BIT_WORD(id)] &= ~BIT_MASK(id);
1166                 }
1167         } while (defers > 0);
1168 }
1169
1170 static int of_unittest_apply_overlay(int unittest_nr, int overlay_nr,
1171                 int *overlay_id)
1172 {
1173         struct device_node *np = NULL;
1174         int ret, id = -1;
1175
1176         np = of_find_node_by_path(overlay_path(overlay_nr));
1177         if (np == NULL) {
1178                 unittest(0, "could not find overlay node @\"%s\"\n",
1179                                 overlay_path(overlay_nr));
1180                 ret = -EINVAL;
1181                 goto out;
1182         }
1183
1184         ret = of_overlay_create(np);
1185         if (ret < 0) {
1186                 unittest(0, "could not create overlay from \"%s\"\n",
1187                                 overlay_path(overlay_nr));
1188                 goto out;
1189         }
1190         id = ret;
1191         of_unittest_track_overlay(id);
1192
1193         ret = 0;
1194
1195 out:
1196         of_node_put(np);
1197
1198         if (overlay_id)
1199                 *overlay_id = id;
1200
1201         return ret;
1202 }
1203
1204 /* apply an overlay while checking before and after states */
1205 static int of_unittest_apply_overlay_check(int overlay_nr, int unittest_nr,
1206                 int before, int after, enum overlay_type ovtype)
1207 {
1208         int ret;
1209
1210         /* unittest device must not be in before state */
1211         if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
1212                 unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1213                                 overlay_path(overlay_nr),
1214                                 unittest_path(unittest_nr, ovtype),
1215                                 !before ? "enabled" : "disabled");
1216                 return -EINVAL;
1217         }
1218
1219         ret = of_unittest_apply_overlay(overlay_nr, unittest_nr, NULL);
1220         if (ret != 0) {
1221                 /* of_unittest_apply_overlay already called unittest() */
1222                 return ret;
1223         }
1224
1225         /* unittest device must be to set to after state */
1226         if (of_unittest_device_exists(unittest_nr, ovtype) != after) {
1227                 unittest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n",
1228                                 overlay_path(overlay_nr),
1229                                 unittest_path(unittest_nr, ovtype),
1230                                 !after ? "enabled" : "disabled");
1231                 return -EINVAL;
1232         }
1233
1234         return 0;
1235 }
1236
1237 /* apply an overlay and then revert it while checking before, after states */
1238 static int of_unittest_apply_revert_overlay_check(int overlay_nr,
1239                 int unittest_nr, int before, int after,
1240                 enum overlay_type ovtype)
1241 {
1242         int ret, ov_id;
1243
1244         /* unittest device must be in before state */
1245         if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
1246                 unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1247                                 overlay_path(overlay_nr),
1248                                 unittest_path(unittest_nr, ovtype),
1249                                 !before ? "enabled" : "disabled");
1250                 return -EINVAL;
1251         }
1252
1253         /* apply the overlay */
1254         ret = of_unittest_apply_overlay(overlay_nr, unittest_nr, &ov_id);
1255         if (ret != 0) {
1256                 /* of_unittest_apply_overlay already called unittest() */
1257                 return ret;
1258         }
1259
1260         /* unittest device must be in after state */
1261         if (of_unittest_device_exists(unittest_nr, ovtype) != after) {
1262                 unittest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n",
1263                                 overlay_path(overlay_nr),
1264                                 unittest_path(unittest_nr, ovtype),
1265                                 !after ? "enabled" : "disabled");
1266                 return -EINVAL;
1267         }
1268
1269         ret = of_overlay_destroy(ov_id);
1270         if (ret != 0) {
1271                 unittest(0, "overlay @\"%s\" failed to be destroyed @\"%s\"\n",
1272                                 overlay_path(overlay_nr),
1273                                 unittest_path(unittest_nr, ovtype));
1274                 return ret;
1275         }
1276
1277         /* unittest device must be again in before state */
1278         if (of_unittest_device_exists(unittest_nr, PDEV_OVERLAY) != before) {
1279                 unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1280                                 overlay_path(overlay_nr),
1281                                 unittest_path(unittest_nr, ovtype),
1282                                 !before ? "enabled" : "disabled");
1283                 return -EINVAL;
1284         }
1285
1286         return 0;
1287 }
1288
1289 /* test activation of device */
1290 static void of_unittest_overlay_0(void)
1291 {
1292         int ret;
1293
1294         /* device should enable */
1295         ret = of_unittest_apply_overlay_check(0, 0, 0, 1, PDEV_OVERLAY);
1296         if (ret != 0)
1297                 return;
1298
1299         unittest(1, "overlay test %d passed\n", 0);
1300 }
1301
1302 /* test deactivation of device */
1303 static void of_unittest_overlay_1(void)
1304 {
1305         int ret;
1306
1307         /* device should disable */
1308         ret = of_unittest_apply_overlay_check(1, 1, 1, 0, PDEV_OVERLAY);
1309         if (ret != 0)
1310                 return;
1311
1312         unittest(1, "overlay test %d passed\n", 1);
1313 }
1314
1315 /* test activation of device */
1316 static void of_unittest_overlay_2(void)
1317 {
1318         int ret;
1319
1320         /* device should enable */
1321         ret = of_unittest_apply_overlay_check(2, 2, 0, 1, PDEV_OVERLAY);
1322         if (ret != 0)
1323                 return;
1324
1325         unittest(1, "overlay test %d passed\n", 2);
1326 }
1327
1328 /* test deactivation of device */
1329 static void of_unittest_overlay_3(void)
1330 {
1331         int ret;
1332
1333         /* device should disable */
1334         ret = of_unittest_apply_overlay_check(3, 3, 1, 0, PDEV_OVERLAY);
1335         if (ret != 0)
1336                 return;
1337
1338         unittest(1, "overlay test %d passed\n", 3);
1339 }
1340
1341 /* test activation of a full device node */
1342 static void of_unittest_overlay_4(void)
1343 {
1344         int ret;
1345
1346         /* device should disable */
1347         ret = of_unittest_apply_overlay_check(4, 4, 0, 1, PDEV_OVERLAY);
1348         if (ret != 0)
1349                 return;
1350
1351         unittest(1, "overlay test %d passed\n", 4);
1352 }
1353
1354 /* test overlay apply/revert sequence */
1355 static void of_unittest_overlay_5(void)
1356 {
1357         int ret;
1358
1359         /* device should disable */
1360         ret = of_unittest_apply_revert_overlay_check(5, 5, 0, 1, PDEV_OVERLAY);
1361         if (ret != 0)
1362                 return;
1363
1364         unittest(1, "overlay test %d passed\n", 5);
1365 }
1366
1367 /* test overlay application in sequence */
1368 static void of_unittest_overlay_6(void)
1369 {
1370         struct device_node *np;
1371         int ret, i, ov_id[2];
1372         int overlay_nr = 6, unittest_nr = 6;
1373         int before = 0, after = 1;
1374
1375         /* unittest device must be in before state */
1376         for (i = 0; i < 2; i++) {
1377                 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
1378                                 != before) {
1379                         unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1380                                         overlay_path(overlay_nr + i),
1381                                         unittest_path(unittest_nr + i,
1382                                                 PDEV_OVERLAY),
1383                                         !before ? "enabled" : "disabled");
1384                         return;
1385                 }
1386         }
1387
1388         /* apply the overlays */
1389         for (i = 0; i < 2; i++) {
1390
1391                 np = of_find_node_by_path(overlay_path(overlay_nr + i));
1392                 if (np == NULL) {
1393                         unittest(0, "could not find overlay node @\"%s\"\n",
1394                                         overlay_path(overlay_nr + i));
1395                         return;
1396                 }
1397
1398                 ret = of_overlay_create(np);
1399                 if (ret < 0)  {
1400                         unittest(0, "could not create overlay from \"%s\"\n",
1401                                         overlay_path(overlay_nr + i));
1402                         return;
1403                 }
1404                 ov_id[i] = ret;
1405                 of_unittest_track_overlay(ov_id[i]);
1406         }
1407
1408         for (i = 0; i < 2; i++) {
1409                 /* unittest device must be in after state */
1410                 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
1411                                 != after) {
1412                         unittest(0, "overlay @\"%s\" failed @\"%s\" %s\n",
1413                                         overlay_path(overlay_nr + i),
1414                                         unittest_path(unittest_nr + i,
1415                                                 PDEV_OVERLAY),
1416                                         !after ? "enabled" : "disabled");
1417                         return;
1418                 }
1419         }
1420
1421         for (i = 1; i >= 0; i--) {
1422                 ret = of_overlay_destroy(ov_id[i]);
1423                 if (ret != 0) {
1424                         unittest(0, "overlay @\"%s\" failed destroy @\"%s\"\n",
1425                                         overlay_path(overlay_nr + i),
1426                                         unittest_path(unittest_nr + i,
1427                                                 PDEV_OVERLAY));
1428                         return;
1429                 }
1430                 of_unittest_untrack_overlay(ov_id[i]);
1431         }
1432
1433         for (i = 0; i < 2; i++) {
1434                 /* unittest device must be again in before state */
1435                 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
1436                                 != before) {
1437                         unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1438                                         overlay_path(overlay_nr + i),
1439                                         unittest_path(unittest_nr + i,
1440                                                 PDEV_OVERLAY),
1441                                         !before ? "enabled" : "disabled");
1442                         return;
1443                 }
1444         }
1445
1446         unittest(1, "overlay test %d passed\n", 6);
1447 }
1448
1449 /* test overlay application in sequence */
1450 static void of_unittest_overlay_8(void)
1451 {
1452         struct device_node *np;
1453         int ret, i, ov_id[2];
1454         int overlay_nr = 8, unittest_nr = 8;
1455
1456         /* we don't care about device state in this test */
1457
1458         /* apply the overlays */
1459         for (i = 0; i < 2; i++) {
1460
1461                 np = of_find_node_by_path(overlay_path(overlay_nr + i));
1462                 if (np == NULL) {
1463                         unittest(0, "could not find overlay node @\"%s\"\n",
1464                                         overlay_path(overlay_nr + i));
1465                         return;
1466                 }
1467
1468                 ret = of_overlay_create(np);
1469                 if (ret < 0)  {
1470                         unittest(0, "could not create overlay from \"%s\"\n",
1471                                         overlay_path(overlay_nr + i));
1472                         return;
1473                 }
1474                 ov_id[i] = ret;
1475                 of_unittest_track_overlay(ov_id[i]);
1476         }
1477
1478         /* now try to remove first overlay (it should fail) */
1479         ret = of_overlay_destroy(ov_id[0]);
1480         if (ret == 0) {
1481                 unittest(0, "overlay @\"%s\" was destroyed @\"%s\"\n",
1482                                 overlay_path(overlay_nr + 0),
1483                                 unittest_path(unittest_nr,
1484                                         PDEV_OVERLAY));
1485                 return;
1486         }
1487
1488         /* removing them in order should work */
1489         for (i = 1; i >= 0; i--) {
1490                 ret = of_overlay_destroy(ov_id[i]);
1491                 if (ret != 0) {
1492                         unittest(0, "overlay @\"%s\" not destroyed @\"%s\"\n",
1493                                         overlay_path(overlay_nr + i),
1494                                         unittest_path(unittest_nr,
1495                                                 PDEV_OVERLAY));
1496                         return;
1497                 }
1498                 of_unittest_untrack_overlay(ov_id[i]);
1499         }
1500
1501         unittest(1, "overlay test %d passed\n", 8);
1502 }
1503
1504 /* test insertion of a bus with parent devices */
1505 static void of_unittest_overlay_10(void)
1506 {
1507         int ret;
1508         char *child_path;
1509
1510         /* device should disable */
1511         ret = of_unittest_apply_overlay_check(10, 10, 0, 1, PDEV_OVERLAY);
1512         if (unittest(ret == 0,
1513                         "overlay test %d failed; overlay application\n", 10))
1514                 return;
1515
1516         child_path = kasprintf(GFP_KERNEL, "%s/test-unittest101",
1517                         unittest_path(10, PDEV_OVERLAY));
1518         if (unittest(child_path, "overlay test %d failed; kasprintf\n", 10))
1519                 return;
1520
1521         ret = of_path_device_type_exists(child_path, PDEV_OVERLAY);
1522         kfree(child_path);
1523         if (unittest(ret, "overlay test %d failed; no child device\n", 10))
1524                 return;
1525 }
1526
1527 /* test insertion of a bus with parent devices (and revert) */
1528 static void of_unittest_overlay_11(void)
1529 {
1530         int ret;
1531
1532         /* device should disable */
1533         ret = of_unittest_apply_revert_overlay_check(11, 11, 0, 1,
1534                         PDEV_OVERLAY);
1535         if (unittest(ret == 0,
1536                         "overlay test %d failed; overlay application\n", 11))
1537                 return;
1538 }
1539
1540 #if IS_BUILTIN(CONFIG_I2C) && IS_ENABLED(CONFIG_OF_OVERLAY)
1541
1542 struct unittest_i2c_bus_data {
1543         struct platform_device  *pdev;
1544         struct i2c_adapter      adap;
1545 };
1546
1547 static int unittest_i2c_master_xfer(struct i2c_adapter *adap,
1548                 struct i2c_msg *msgs, int num)
1549 {
1550         struct unittest_i2c_bus_data *std = i2c_get_adapdata(adap);
1551
1552         (void)std;
1553
1554         return num;
1555 }
1556
1557 static u32 unittest_i2c_functionality(struct i2c_adapter *adap)
1558 {
1559         return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
1560 }
1561
1562 static const struct i2c_algorithm unittest_i2c_algo = {
1563         .master_xfer    = unittest_i2c_master_xfer,
1564         .functionality  = unittest_i2c_functionality,
1565 };
1566
1567 static int unittest_i2c_bus_probe(struct platform_device *pdev)
1568 {
1569         struct device *dev = &pdev->dev;
1570         struct device_node *np = dev->of_node;
1571         struct unittest_i2c_bus_data *std;
1572         struct i2c_adapter *adap;
1573         int ret;
1574
1575         if (np == NULL) {
1576                 dev_err(dev, "No OF data for device\n");
1577                 return -EINVAL;
1578
1579         }
1580
1581         dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1582
1583         std = devm_kzalloc(dev, sizeof(*std), GFP_KERNEL);
1584         if (!std) {
1585                 dev_err(dev, "Failed to allocate unittest i2c data\n");
1586                 return -ENOMEM;
1587         }
1588
1589         /* link them together */
1590         std->pdev = pdev;
1591         platform_set_drvdata(pdev, std);
1592
1593         adap = &std->adap;
1594         i2c_set_adapdata(adap, std);
1595         adap->nr = -1;
1596         strlcpy(adap->name, pdev->name, sizeof(adap->name));
1597         adap->class = I2C_CLASS_DEPRECATED;
1598         adap->algo = &unittest_i2c_algo;
1599         adap->dev.parent = dev;
1600         adap->dev.of_node = dev->of_node;
1601         adap->timeout = 5 * HZ;
1602         adap->retries = 3;
1603
1604         ret = i2c_add_numbered_adapter(adap);
1605         if (ret != 0) {
1606                 dev_err(dev, "Failed to add I2C adapter\n");
1607                 return ret;
1608         }
1609
1610         return 0;
1611 }
1612
1613 static int unittest_i2c_bus_remove(struct platform_device *pdev)
1614 {
1615         struct device *dev = &pdev->dev;
1616         struct device_node *np = dev->of_node;
1617         struct unittest_i2c_bus_data *std = platform_get_drvdata(pdev);
1618
1619         dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1620         i2c_del_adapter(&std->adap);
1621
1622         return 0;
1623 }
1624
1625 static const struct of_device_id unittest_i2c_bus_match[] = {
1626         { .compatible = "unittest-i2c-bus", },
1627         {},
1628 };
1629
1630 static struct platform_driver unittest_i2c_bus_driver = {
1631         .probe                  = unittest_i2c_bus_probe,
1632         .remove                 = unittest_i2c_bus_remove,
1633         .driver = {
1634                 .name           = "unittest-i2c-bus",
1635                 .of_match_table = of_match_ptr(unittest_i2c_bus_match),
1636         },
1637 };
1638
1639 static int unittest_i2c_dev_probe(struct i2c_client *client,
1640                 const struct i2c_device_id *id)
1641 {
1642         struct device *dev = &client->dev;
1643         struct device_node *np = client->dev.of_node;
1644
1645         if (!np) {
1646                 dev_err(dev, "No OF node\n");
1647                 return -EINVAL;
1648         }
1649
1650         dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1651
1652         return 0;
1653 };
1654
1655 static int unittest_i2c_dev_remove(struct i2c_client *client)
1656 {
1657         struct device *dev = &client->dev;
1658         struct device_node *np = client->dev.of_node;
1659
1660         dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1661         return 0;
1662 }
1663
1664 static const struct i2c_device_id unittest_i2c_dev_id[] = {
1665         { .name = "unittest-i2c-dev" },
1666         { }
1667 };
1668
1669 static struct i2c_driver unittest_i2c_dev_driver = {
1670         .driver = {
1671                 .name = "unittest-i2c-dev",
1672         },
1673         .probe = unittest_i2c_dev_probe,
1674         .remove = unittest_i2c_dev_remove,
1675         .id_table = unittest_i2c_dev_id,
1676 };
1677
1678 #if IS_BUILTIN(CONFIG_I2C_MUX)
1679
1680 struct unittest_i2c_mux_data {
1681         int nchans;
1682         struct i2c_adapter *adap[];
1683 };
1684
1685 static int unittest_i2c_mux_select_chan(struct i2c_adapter *adap,
1686                                void *client, u32 chan)
1687 {
1688         return 0;
1689 }
1690
1691 static int unittest_i2c_mux_probe(struct i2c_client *client,
1692                 const struct i2c_device_id *id)
1693 {
1694         int ret, i, nchans, size;
1695         struct device *dev = &client->dev;
1696         struct i2c_adapter *adap = to_i2c_adapter(dev->parent);
1697         struct device_node *np = client->dev.of_node, *child;
1698         struct unittest_i2c_mux_data *stm;
1699         u32 reg, max_reg;
1700
1701         dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1702
1703         if (!np) {
1704                 dev_err(dev, "No OF node\n");
1705                 return -EINVAL;
1706         }
1707
1708         max_reg = (u32)-1;
1709         for_each_child_of_node(np, child) {
1710                 ret = of_property_read_u32(child, "reg", &reg);
1711                 if (ret)
1712                         continue;
1713                 if (max_reg == (u32)-1 || reg > max_reg)
1714                         max_reg = reg;
1715         }
1716         nchans = max_reg == (u32)-1 ? 0 : max_reg + 1;
1717         if (nchans == 0) {
1718                 dev_err(dev, "No channels\n");
1719                 return -EINVAL;
1720         }
1721
1722         size = offsetof(struct unittest_i2c_mux_data, adap[nchans]);
1723         stm = devm_kzalloc(dev, size, GFP_KERNEL);
1724         if (!stm) {
1725                 dev_err(dev, "Out of memory\n");
1726                 return -ENOMEM;
1727         }
1728         stm->nchans = nchans;
1729         for (i = 0; i < nchans; i++) {
1730                 stm->adap[i] = i2c_add_mux_adapter(adap, dev, client,
1731                                 0, i, 0, unittest_i2c_mux_select_chan, NULL);
1732                 if (!stm->adap[i]) {
1733                         dev_err(dev, "Failed to register mux #%d\n", i);
1734                         for (i--; i >= 0; i--)
1735                                 i2c_del_mux_adapter(stm->adap[i]);
1736                         return -ENODEV;
1737                 }
1738         }
1739
1740         i2c_set_clientdata(client, stm);
1741
1742         return 0;
1743 };
1744
1745 static int unittest_i2c_mux_remove(struct i2c_client *client)
1746 {
1747         struct device *dev = &client->dev;
1748         struct device_node *np = client->dev.of_node;
1749         struct unittest_i2c_mux_data *stm = i2c_get_clientdata(client);
1750         int i;
1751
1752         dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1753         for (i = stm->nchans - 1; i >= 0; i--)
1754                 i2c_del_mux_adapter(stm->adap[i]);
1755         return 0;
1756 }
1757
1758 static const struct i2c_device_id unittest_i2c_mux_id[] = {
1759         { .name = "unittest-i2c-mux" },
1760         { }
1761 };
1762
1763 static struct i2c_driver unittest_i2c_mux_driver = {
1764         .driver = {
1765                 .name = "unittest-i2c-mux",
1766         },
1767         .probe = unittest_i2c_mux_probe,
1768         .remove = unittest_i2c_mux_remove,
1769         .id_table = unittest_i2c_mux_id,
1770 };
1771
1772 #endif
1773
1774 static int of_unittest_overlay_i2c_init(void)
1775 {
1776         int ret;
1777
1778         ret = i2c_add_driver(&unittest_i2c_dev_driver);
1779         if (unittest(ret == 0,
1780                         "could not register unittest i2c device driver\n"))
1781                 return ret;
1782
1783         ret = platform_driver_register(&unittest_i2c_bus_driver);
1784         if (unittest(ret == 0,
1785                         "could not register unittest i2c bus driver\n"))
1786                 return ret;
1787
1788 #if IS_BUILTIN(CONFIG_I2C_MUX)
1789         ret = i2c_add_driver(&unittest_i2c_mux_driver);
1790         if (unittest(ret == 0,
1791                         "could not register unittest i2c mux driver\n"))
1792                 return ret;
1793 #endif
1794
1795         return 0;
1796 }
1797
1798 static void of_unittest_overlay_i2c_cleanup(void)
1799 {
1800 #if IS_BUILTIN(CONFIG_I2C_MUX)
1801         i2c_del_driver(&unittest_i2c_mux_driver);
1802 #endif
1803         platform_driver_unregister(&unittest_i2c_bus_driver);
1804         i2c_del_driver(&unittest_i2c_dev_driver);
1805 }
1806
1807 static void of_unittest_overlay_i2c_12(void)
1808 {
1809         int ret;
1810
1811         /* device should enable */
1812         ret = of_unittest_apply_overlay_check(12, 12, 0, 1, I2C_OVERLAY);
1813         if (ret != 0)
1814                 return;
1815
1816         unittest(1, "overlay test %d passed\n", 12);
1817 }
1818
1819 /* test deactivation of device */
1820 static void of_unittest_overlay_i2c_13(void)
1821 {
1822         int ret;
1823
1824         /* device should disable */
1825         ret = of_unittest_apply_overlay_check(13, 13, 1, 0, I2C_OVERLAY);
1826         if (ret != 0)
1827                 return;
1828
1829         unittest(1, "overlay test %d passed\n", 13);
1830 }
1831
1832 /* just check for i2c mux existence */
1833 static void of_unittest_overlay_i2c_14(void)
1834 {
1835 }
1836
1837 static void of_unittest_overlay_i2c_15(void)
1838 {
1839         int ret;
1840
1841         /* device should enable */
1842         ret = of_unittest_apply_overlay_check(16, 15, 0, 1, I2C_OVERLAY);
1843         if (ret != 0)
1844                 return;
1845
1846         unittest(1, "overlay test %d passed\n", 15);
1847 }
1848
1849 #else
1850
1851 static inline void of_unittest_overlay_i2c_14(void) { }
1852 static inline void of_unittest_overlay_i2c_15(void) { }
1853
1854 #endif
1855
1856 static void __init of_unittest_overlay(void)
1857 {
1858         struct device_node *bus_np = NULL;
1859         int ret;
1860
1861         ret = platform_driver_register(&unittest_driver);
1862         if (ret != 0) {
1863                 unittest(0, "could not register unittest driver\n");
1864                 goto out;
1865         }
1866
1867         bus_np = of_find_node_by_path(bus_path);
1868         if (bus_np == NULL) {
1869                 unittest(0, "could not find bus_path \"%s\"\n", bus_path);
1870                 goto out;
1871         }
1872
1873         ret = of_platform_populate(bus_np, of_default_bus_match_table,
1874                         NULL, NULL);
1875         if (ret != 0) {
1876                 unittest(0, "could not populate bus @ \"%s\"\n", bus_path);
1877                 goto out;
1878         }
1879
1880         if (!of_unittest_device_exists(100, PDEV_OVERLAY)) {
1881                 unittest(0, "could not find unittest0 @ \"%s\"\n",
1882                                 unittest_path(100, PDEV_OVERLAY));
1883                 goto out;
1884         }
1885
1886         if (of_unittest_device_exists(101, PDEV_OVERLAY)) {
1887                 unittest(0, "unittest1 @ \"%s\" should not exist\n",
1888                                 unittest_path(101, PDEV_OVERLAY));
1889                 goto out;
1890         }
1891
1892         unittest(1, "basic infrastructure of overlays passed");
1893
1894         /* tests in sequence */
1895         of_unittest_overlay_0();
1896         of_unittest_overlay_1();
1897         of_unittest_overlay_2();
1898         of_unittest_overlay_3();
1899         of_unittest_overlay_4();
1900         of_unittest_overlay_5();
1901         of_unittest_overlay_6();
1902         of_unittest_overlay_8();
1903
1904         of_unittest_overlay_10();
1905         of_unittest_overlay_11();
1906
1907 #if IS_BUILTIN(CONFIG_I2C)
1908         if (unittest(of_unittest_overlay_i2c_init() == 0, "i2c init failed\n"))
1909                 goto out;
1910
1911         of_unittest_overlay_i2c_12();
1912         of_unittest_overlay_i2c_13();
1913         of_unittest_overlay_i2c_14();
1914         of_unittest_overlay_i2c_15();
1915
1916         of_unittest_overlay_i2c_cleanup();
1917 #endif
1918
1919         of_unittest_destroy_tracked_overlays();
1920
1921 out:
1922         of_node_put(bus_np);
1923 }
1924
1925 #else
1926 static inline void __init of_unittest_overlay(void) { }
1927 #endif
1928
1929 static int __init of_unittest(void)
1930 {
1931         struct device_node *np;
1932         int res;
1933
1934         /* adding data for unittest */
1935         res = unittest_data_add();
1936         if (res)
1937                 return res;
1938         if (!of_aliases)
1939                 of_aliases = of_find_node_by_path("/aliases");
1940
1941         np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
1942         if (!np) {
1943                 pr_info("No testcase data in device tree; not running tests\n");
1944                 return 0;
1945         }
1946         of_node_put(np);
1947
1948         pr_info("start of unittest - you will see error messages\n");
1949         of_unittest_check_tree_linkage();
1950         of_unittest_check_phandles();
1951         of_unittest_find_node_by_name();
1952         of_unittest_dynamic();
1953         of_unittest_parse_phandle_with_args();
1954         of_unittest_property_string();
1955         of_unittest_property_copy();
1956         of_unittest_changeset();
1957         of_unittest_parse_interrupts();
1958         of_unittest_parse_interrupts_extended();
1959         of_unittest_match_node();
1960         of_unittest_platform_populate();
1961         of_unittest_overlay();
1962
1963         /* Double check linkage after removing testcase data */
1964         of_unittest_check_tree_linkage();
1965
1966         pr_info("end of unittest - %i passed, %i failed\n",
1967                 unittest_results.passed, unittest_results.failed);
1968
1969         return 0;
1970 }
1971 late_initcall(of_unittest);