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