2 * Self tests for device tree subsystem
5 #define pr_fmt(fmt) "### dt-test ### " fmt
9 #include <linux/errno.h>
10 #include <linux/hashtable.h>
11 #include <linux/module.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>
21 #include "of_private.h"
23 static struct selftest_results {
29 static struct device_node *nodes[NO_OF_NODES];
30 static int last_node_index;
31 static bool selftest_live_tree;
33 #define selftest(result, fmt, ...) { \
35 selftest_results.failed++; \
36 pr_err("FAIL %s():%i " fmt, __func__, __LINE__, ##__VA_ARGS__); \
38 selftest_results.passed++; \
39 pr_debug("pass %s():%i\n", __func__, __LINE__); \
43 static void __init of_selftest_find_node_by_name(void)
45 struct device_node *np;
47 np = of_find_node_by_path("/testcase-data");
48 selftest(np && !strcmp("/testcase-data", np->full_name),
49 "find /testcase-data failed\n");
52 /* Test if trailing '/' works */
53 np = of_find_node_by_path("/testcase-data/");
54 selftest(!np, "trailing '/' on /testcase-data/ should fail\n");
56 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
57 selftest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", np->full_name),
58 "find /testcase-data/phandle-tests/consumer-a failed\n");
61 np = of_find_node_by_path("testcase-alias");
62 selftest(np && !strcmp("/testcase-data", np->full_name),
63 "find testcase-alias failed\n");
66 /* Test if trailing '/' works on aliases */
67 np = of_find_node_by_path("testcase-alias/");
68 selftest(!np, "trailing '/' on testcase-alias/ should fail\n");
70 np = of_find_node_by_path("testcase-alias/phandle-tests/consumer-a");
71 selftest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", np->full_name),
72 "find testcase-alias/phandle-tests/consumer-a failed\n");
75 np = of_find_node_by_path("/testcase-data/missing-path");
76 selftest(!np, "non-existent path returned node %s\n", np->full_name);
79 np = of_find_node_by_path("missing-alias");
80 selftest(!np, "non-existent alias returned node %s\n", np->full_name);
83 np = of_find_node_by_path("testcase-alias/missing-path");
84 selftest(!np, "non-existent alias with relative path returned node %s\n", np->full_name);
88 static void __init of_selftest_dynamic(void)
90 struct device_node *np;
91 struct property *prop;
93 np = of_find_node_by_path("/testcase-data");
95 pr_err("missing testcase data\n");
99 /* Array of 4 properties for the purpose of testing */
100 prop = kzalloc(sizeof(*prop) * 4, GFP_KERNEL);
102 selftest(0, "kzalloc() failed\n");
106 /* Add a new property - should pass*/
107 prop->name = "new-property";
108 prop->value = "new-property-data";
109 prop->length = strlen(prop->value);
110 selftest(of_add_property(np, prop) == 0, "Adding a new property failed\n");
112 /* Try to add an existing property - should fail */
114 prop->name = "new-property";
115 prop->value = "new-property-data-should-fail";
116 prop->length = strlen(prop->value);
117 selftest(of_add_property(np, prop) != 0,
118 "Adding an existing property should have failed\n");
120 /* Try to modify an existing property - should pass */
121 prop->value = "modify-property-data-should-pass";
122 prop->length = strlen(prop->value);
123 selftest(of_update_property(np, prop) == 0,
124 "Updating an existing property should have passed\n");
126 /* Try to modify non-existent property - should pass*/
128 prop->name = "modify-property";
129 prop->value = "modify-missing-property-data-should-pass";
130 prop->length = strlen(prop->value);
131 selftest(of_update_property(np, prop) == 0,
132 "Updating a missing property should have passed\n");
134 /* Remove property - should pass */
135 selftest(of_remove_property(np, prop) == 0,
136 "Removing a property should have passed\n");
138 /* Adding very large property - should pass */
140 prop->name = "large-property-PAGE_SIZEx8";
141 prop->length = PAGE_SIZE * 8;
142 prop->value = kzalloc(prop->length, GFP_KERNEL);
143 selftest(prop->value != NULL, "Unable to allocate large buffer\n");
145 selftest(of_add_property(np, prop) == 0,
146 "Adding a large property should have passed\n");
149 static int __init of_selftest_check_node_linkage(struct device_node *np)
151 struct device_node *child, *allnext_index = np;
154 for_each_child_of_node(np, child) {
155 if (child->parent != np) {
156 pr_err("Child node %s links to wrong parent %s\n",
157 child->name, np->name);
161 while (allnext_index && allnext_index != child)
162 allnext_index = allnext_index->allnext;
163 if (allnext_index != child) {
164 pr_err("Node %s is ordered differently in sibling and allnode lists\n",
169 rc = of_selftest_check_node_linkage(child);
178 static void __init of_selftest_check_tree_linkage(void)
180 struct device_node *np;
181 int allnode_count = 0, child_count;
186 for_each_of_allnodes(np)
188 child_count = of_selftest_check_node_linkage(of_allnodes);
190 selftest(child_count > 0, "Device node data structure is corrupted\n");
191 selftest(child_count == allnode_count, "allnodes list size (%i) doesn't match"
192 "sibling lists size (%i)\n", allnode_count, child_count);
193 pr_debug("allnodes list size (%i); sibling lists size (%i)\n", allnode_count, child_count);
197 struct hlist_node node;
198 struct device_node *np;
201 static DEFINE_HASHTABLE(phandle_ht, 8);
202 static void __init of_selftest_check_phandles(void)
204 struct device_node *np;
205 struct node_hash *nh;
206 struct hlist_node *tmp;
207 int i, dup_count = 0, phandle_count = 0;
209 for_each_of_allnodes(np) {
213 hash_for_each_possible(phandle_ht, nh, node, np->phandle) {
214 if (nh->np->phandle == np->phandle) {
215 pr_info("Duplicate phandle! %i used by %s and %s\n",
216 np->phandle, nh->np->full_name, np->full_name);
222 nh = kzalloc(sizeof(*nh), GFP_KERNEL);
227 hash_add(phandle_ht, &nh->node, np->phandle);
230 selftest(dup_count == 0, "Found %i duplicates in %i phandles\n",
231 dup_count, phandle_count);
234 hash_for_each_safe(phandle_ht, i, tmp, nh, node) {
240 static void __init of_selftest_parse_phandle_with_args(void)
242 struct device_node *np;
243 struct of_phandle_args args;
246 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
248 pr_err("missing testcase data\n");
252 rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
253 selftest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc);
255 for (i = 0; i < 8; i++) {
257 rc = of_parse_phandle_with_args(np, "phandle-list",
258 "#phandle-cells", i, &args);
260 /* Test the values from tests-phandle.dtsi */
264 passed &= (args.args_count == 1);
265 passed &= (args.args[0] == (i + 1));
269 passed &= (args.args_count == 2);
270 passed &= (args.args[0] == (i + 1));
271 passed &= (args.args[1] == 0);
274 passed &= (rc == -ENOENT);
278 passed &= (args.args_count == 3);
279 passed &= (args.args[0] == (i + 1));
280 passed &= (args.args[1] == 4);
281 passed &= (args.args[2] == 3);
285 passed &= (args.args_count == 2);
286 passed &= (args.args[0] == (i + 1));
287 passed &= (args.args[1] == 100);
291 passed &= (args.args_count == 0);
295 passed &= (args.args_count == 1);
296 passed &= (args.args[0] == (i + 1));
299 passed &= (rc == -ENOENT);
305 selftest(passed, "index %i - data error on node %s rc=%i\n",
306 i, args.np->full_name, rc);
309 /* Check for missing list property */
310 rc = of_parse_phandle_with_args(np, "phandle-list-missing",
311 "#phandle-cells", 0, &args);
312 selftest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
313 rc = of_count_phandle_with_args(np, "phandle-list-missing",
315 selftest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
317 /* Check for missing cells property */
318 rc = of_parse_phandle_with_args(np, "phandle-list",
319 "#phandle-cells-missing", 0, &args);
320 selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
321 rc = of_count_phandle_with_args(np, "phandle-list",
322 "#phandle-cells-missing");
323 selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
325 /* Check for bad phandle in list */
326 rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle",
327 "#phandle-cells", 0, &args);
328 selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
329 rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle",
331 selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
333 /* Check for incorrectly formed argument list */
334 rc = of_parse_phandle_with_args(np, "phandle-list-bad-args",
335 "#phandle-cells", 1, &args);
336 selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
337 rc = of_count_phandle_with_args(np, "phandle-list-bad-args",
339 selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
342 static void __init of_selftest_property_string(void)
344 const char *strings[4];
345 struct device_node *np;
348 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
350 pr_err("No testcase data in device tree\n");
354 rc = of_property_match_string(np, "phandle-list-names", "first");
355 selftest(rc == 0, "first expected:0 got:%i\n", rc);
356 rc = of_property_match_string(np, "phandle-list-names", "second");
357 selftest(rc == 1, "second expected:0 got:%i\n", rc);
358 rc = of_property_match_string(np, "phandle-list-names", "third");
359 selftest(rc == 2, "third expected:0 got:%i\n", rc);
360 rc = of_property_match_string(np, "phandle-list-names", "fourth");
361 selftest(rc == -ENODATA, "unmatched string; rc=%i\n", rc);
362 rc = of_property_match_string(np, "missing-property", "blah");
363 selftest(rc == -EINVAL, "missing property; rc=%i\n", rc);
364 rc = of_property_match_string(np, "empty-property", "blah");
365 selftest(rc == -ENODATA, "empty property; rc=%i\n", rc);
366 rc = of_property_match_string(np, "unterminated-string", "blah");
367 selftest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
369 /* of_property_count_strings() tests */
370 rc = of_property_count_strings(np, "string-property");
371 selftest(rc == 1, "Incorrect string count; rc=%i\n", rc);
372 rc = of_property_count_strings(np, "phandle-list-names");
373 selftest(rc == 3, "Incorrect string count; rc=%i\n", rc);
374 rc = of_property_count_strings(np, "unterminated-string");
375 selftest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
376 rc = of_property_count_strings(np, "unterminated-string-list");
377 selftest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
379 /* of_property_read_string_index() tests */
380 rc = of_property_read_string_index(np, "string-property", 0, strings);
381 selftest(rc == 0 && !strcmp(strings[0], "foobar"), "of_property_read_string_index() failure; rc=%i\n", rc);
383 rc = of_property_read_string_index(np, "string-property", 1, strings);
384 selftest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
385 rc = of_property_read_string_index(np, "phandle-list-names", 0, strings);
386 selftest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
387 rc = of_property_read_string_index(np, "phandle-list-names", 1, strings);
388 selftest(rc == 0 && !strcmp(strings[0], "second"), "of_property_read_string_index() failure; rc=%i\n", rc);
389 rc = of_property_read_string_index(np, "phandle-list-names", 2, strings);
390 selftest(rc == 0 && !strcmp(strings[0], "third"), "of_property_read_string_index() failure; rc=%i\n", rc);
392 rc = of_property_read_string_index(np, "phandle-list-names", 3, strings);
393 selftest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
395 rc = of_property_read_string_index(np, "unterminated-string", 0, strings);
396 selftest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
397 rc = of_property_read_string_index(np, "unterminated-string-list", 0, strings);
398 selftest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
400 rc = of_property_read_string_index(np, "unterminated-string-list", 2, strings); /* should fail */
401 selftest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
404 /* of_property_read_string_array() tests */
405 rc = of_property_read_string_array(np, "string-property", strings, 4);
406 selftest(rc == 1, "Incorrect string count; rc=%i\n", rc);
407 rc = of_property_read_string_array(np, "phandle-list-names", strings, 4);
408 selftest(rc == 3, "Incorrect string count; rc=%i\n", rc);
409 rc = of_property_read_string_array(np, "unterminated-string", strings, 4);
410 selftest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
411 /* -- An incorrectly formed string should cause a failure */
412 rc = of_property_read_string_array(np, "unterminated-string-list", strings, 4);
413 selftest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
414 /* -- parsing the correctly formed strings should still work: */
416 rc = of_property_read_string_array(np, "unterminated-string-list", strings, 2);
417 selftest(rc == 2 && strings[2] == NULL, "of_property_read_string_array() failure; rc=%i\n", rc);
419 rc = of_property_read_string_array(np, "phandle-list-names", strings, 1);
420 selftest(rc == 1 && strings[1] == NULL, "Overwrote end of string array; rc=%i, str='%s'\n", rc, strings[1]);
423 #define propcmp(p1, p2) (((p1)->length == (p2)->length) && \
424 (p1)->value && (p2)->value && \
425 !memcmp((p1)->value, (p2)->value, (p1)->length) && \
426 !strcmp((p1)->name, (p2)->name))
427 static void __init of_selftest_property_copy(void)
429 #ifdef CONFIG_OF_DYNAMIC
430 struct property p1 = { .name = "p1", .length = 0, .value = "" };
431 struct property p2 = { .name = "p2", .length = 5, .value = "abcd" };
432 struct property *new;
434 new = __of_prop_dup(&p1, GFP_KERNEL);
435 selftest(new && propcmp(&p1, new), "empty property didn't copy correctly\n");
440 new = __of_prop_dup(&p2, GFP_KERNEL);
441 selftest(new && propcmp(&p2, new), "non-empty property didn't copy correctly\n");
448 static void __init of_selftest_changeset(void)
450 #ifdef CONFIG_OF_DYNAMIC
451 struct property *ppadd, padd = { .name = "prop-add", .length = 0, .value = "" };
452 struct property *ppupdate, pupdate = { .name = "prop-update", .length = 5, .value = "abcd" };
453 struct property *ppremove;
454 struct device_node *n1, *n2, *n21, *nremove, *parent;
455 struct of_changeset chgset;
457 of_changeset_init(&chgset);
458 n1 = __of_node_alloc("/testcase-data/changeset/n1", GFP_KERNEL);
459 selftest(n1, "testcase setup failure\n");
460 n2 = __of_node_alloc("/testcase-data/changeset/n2", GFP_KERNEL);
461 selftest(n2, "testcase setup failure\n");
462 n21 = __of_node_alloc("/testcase-data/changeset/n2/n21", GFP_KERNEL);
463 selftest(n21, "testcase setup failure %p\n", n21);
464 nremove = of_find_node_by_path("/testcase-data/changeset/node-remove");
465 selftest(nremove, "testcase setup failure\n");
466 ppadd = __of_prop_dup(&padd, GFP_KERNEL);
467 selftest(ppadd, "testcase setup failure\n");
468 ppupdate = __of_prop_dup(&pupdate, GFP_KERNEL);
469 selftest(ppupdate, "testcase setup failure\n");
470 parent = nremove->parent;
475 ppremove = of_find_property(parent, "prop-remove", NULL);
476 selftest(ppremove, "failed to find removal prop");
478 of_changeset_init(&chgset);
479 selftest(!of_changeset_attach_node(&chgset, n1), "fail attach n1\n");
480 selftest(!of_changeset_attach_node(&chgset, n2), "fail attach n2\n");
481 selftest(!of_changeset_detach_node(&chgset, nremove), "fail remove node\n");
482 selftest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n");
483 selftest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop\n");
484 selftest(!of_changeset_update_property(&chgset, parent, ppupdate), "fail update prop\n");
485 selftest(!of_changeset_remove_property(&chgset, parent, ppremove), "fail remove prop\n");
486 mutex_lock(&of_mutex);
487 selftest(!of_changeset_apply(&chgset), "apply failed\n");
488 mutex_unlock(&of_mutex);
490 mutex_lock(&of_mutex);
491 selftest(!of_changeset_revert(&chgset), "revert failed\n");
492 mutex_unlock(&of_mutex);
494 of_changeset_destroy(&chgset);
498 static void __init of_selftest_parse_interrupts(void)
500 struct device_node *np;
501 struct of_phandle_args args;
504 np = of_find_node_by_path("/testcase-data/interrupts/interrupts0");
506 pr_err("missing testcase data\n");
510 for (i = 0; i < 4; i++) {
513 rc = of_irq_parse_one(np, i, &args);
516 passed &= (args.args_count == 1);
517 passed &= (args.args[0] == (i + 1));
519 selftest(passed, "index %i - data error on node %s rc=%i\n",
520 i, args.np->full_name, rc);
524 np = of_find_node_by_path("/testcase-data/interrupts/interrupts1");
526 pr_err("missing testcase data\n");
530 for (i = 0; i < 4; i++) {
533 rc = of_irq_parse_one(np, i, &args);
535 /* Test the values from tests-phandle.dtsi */
539 passed &= (args.args_count == 1);
540 passed &= (args.args[0] == 9);
544 passed &= (args.args_count == 3);
545 passed &= (args.args[0] == 10);
546 passed &= (args.args[1] == 11);
547 passed &= (args.args[2] == 12);
551 passed &= (args.args_count == 2);
552 passed &= (args.args[0] == 13);
553 passed &= (args.args[1] == 14);
557 passed &= (args.args_count == 2);
558 passed &= (args.args[0] == 15);
559 passed &= (args.args[1] == 16);
564 selftest(passed, "index %i - data error on node %s rc=%i\n",
565 i, args.np->full_name, rc);
570 static void __init of_selftest_parse_interrupts_extended(void)
572 struct device_node *np;
573 struct of_phandle_args args;
576 np = of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0");
578 pr_err("missing testcase data\n");
582 for (i = 0; i < 7; i++) {
584 rc = of_irq_parse_one(np, i, &args);
586 /* Test the values from tests-phandle.dtsi */
590 passed &= (args.args_count == 1);
591 passed &= (args.args[0] == 1);
595 passed &= (args.args_count == 3);
596 passed &= (args.args[0] == 2);
597 passed &= (args.args[1] == 3);
598 passed &= (args.args[2] == 4);
602 passed &= (args.args_count == 2);
603 passed &= (args.args[0] == 5);
604 passed &= (args.args[1] == 6);
608 passed &= (args.args_count == 1);
609 passed &= (args.args[0] == 9);
613 passed &= (args.args_count == 3);
614 passed &= (args.args[0] == 10);
615 passed &= (args.args[1] == 11);
616 passed &= (args.args[2] == 12);
620 passed &= (args.args_count == 2);
621 passed &= (args.args[0] == 13);
622 passed &= (args.args[1] == 14);
626 passed &= (args.args_count == 1);
627 passed &= (args.args[0] == 15);
633 selftest(passed, "index %i - data error on node %s rc=%i\n",
634 i, args.np->full_name, rc);
639 static struct of_device_id match_node_table[] = {
640 { .data = "A", .name = "name0", }, /* Name alone is lowest priority */
641 { .data = "B", .type = "type1", }, /* followed by type alone */
643 { .data = "Ca", .name = "name2", .type = "type1", }, /* followed by both together */
644 { .data = "Cb", .name = "name2", }, /* Only match when type doesn't match */
645 { .data = "Cc", .name = "name2", .type = "type2", },
647 { .data = "E", .compatible = "compat3" },
648 { .data = "G", .compatible = "compat2", },
649 { .data = "H", .compatible = "compat2", .name = "name5", },
650 { .data = "I", .compatible = "compat2", .type = "type1", },
651 { .data = "J", .compatible = "compat2", .type = "type1", .name = "name8", },
652 { .data = "K", .compatible = "compat2", .name = "name9", },
659 } match_node_tests[] = {
660 { .path = "/testcase-data/match-node/name0", .data = "A", },
661 { .path = "/testcase-data/match-node/name1", .data = "B", },
662 { .path = "/testcase-data/match-node/a/name2", .data = "Ca", },
663 { .path = "/testcase-data/match-node/b/name2", .data = "Cb", },
664 { .path = "/testcase-data/match-node/c/name2", .data = "Cc", },
665 { .path = "/testcase-data/match-node/name3", .data = "E", },
666 { .path = "/testcase-data/match-node/name4", .data = "G", },
667 { .path = "/testcase-data/match-node/name5", .data = "H", },
668 { .path = "/testcase-data/match-node/name6", .data = "G", },
669 { .path = "/testcase-data/match-node/name7", .data = "I", },
670 { .path = "/testcase-data/match-node/name8", .data = "J", },
671 { .path = "/testcase-data/match-node/name9", .data = "K", },
674 static void __init of_selftest_match_node(void)
676 struct device_node *np;
677 const struct of_device_id *match;
680 for (i = 0; i < ARRAY_SIZE(match_node_tests); i++) {
681 np = of_find_node_by_path(match_node_tests[i].path);
683 selftest(0, "missing testcase node %s\n",
684 match_node_tests[i].path);
688 match = of_match_node(match_node_table, np);
690 selftest(0, "%s didn't match anything\n",
691 match_node_tests[i].path);
695 if (strcmp(match->data, match_node_tests[i].data) != 0) {
696 selftest(0, "%s got wrong match. expected %s, got %s\n",
697 match_node_tests[i].path, match_node_tests[i].data,
698 (const char *)match->data);
701 selftest(1, "passed");
705 static void __init of_selftest_platform_populate(void)
708 struct device_node *np, *child;
709 struct platform_device *pdev;
710 struct of_device_id match[] = {
711 { .compatible = "test-device", },
715 np = of_find_node_by_path("/testcase-data");
716 of_platform_populate(np, of_default_bus_match_table, NULL, NULL);
718 /* Test that a missing irq domain returns -EPROBE_DEFER */
719 np = of_find_node_by_path("/testcase-data/testcase-device1");
720 pdev = of_find_device_by_node(np);
721 selftest(pdev, "device 1 creation failed\n");
723 irq = platform_get_irq(pdev, 0);
724 selftest(irq == -EPROBE_DEFER, "device deferred probe failed - %d\n", irq);
726 /* Test that a parsing failure does not return -EPROBE_DEFER */
727 np = of_find_node_by_path("/testcase-data/testcase-device2");
728 pdev = of_find_device_by_node(np);
729 selftest(pdev, "device 2 creation failed\n");
730 irq = platform_get_irq(pdev, 0);
731 selftest(irq < 0 && irq != -EPROBE_DEFER, "device parsing error failed - %d\n", irq);
733 np = of_find_node_by_path("/testcase-data/platform-tests");
735 pr_err("No testcase data in device tree\n");
739 for_each_child_of_node(np, child) {
740 struct device_node *grandchild;
741 of_platform_populate(child, match, NULL, NULL);
742 for_each_child_of_node(child, grandchild)
743 selftest(of_find_device_by_node(grandchild),
744 "Could not create device for node '%s'\n",
750 * update_node_properties - adds the properties
751 * of np into dup node (present in live tree) and
752 * updates parent of children of np to dup.
754 * @np: node already present in live tree
755 * @dup: node present in live tree to be updated
757 static void update_node_properties(struct device_node *np,
758 struct device_node *dup)
760 struct property *prop;
761 struct device_node *child;
763 for_each_property_of_node(np, prop)
764 of_add_property(dup, prop);
766 for_each_child_of_node(np, child)
771 * attach_node_and_children - attaches nodes
772 * and its children to live tree
774 * @np: Node to attach to live tree
776 static int attach_node_and_children(struct device_node *np)
778 struct device_node *next, *root = np, *dup;
782 /* storing a copy in temporary node */
786 if (WARN_ON(last_node_index >= NO_OF_NODES))
788 nodes[last_node_index++] = dup;
795 dup = of_find_node_by_path(np->full_name);
797 update_node_properties(np, dup);
800 if (np->parent == root)
801 np->parent = of_allnodes;
811 * selftest_data_add - Reads, copies data from
812 * linked tree and attaches it to the live tree
814 static int __init selftest_data_add(void)
817 struct device_node *selftest_data_node, *np;
818 extern uint8_t __dtb_testcases_begin[];
819 extern uint8_t __dtb_testcases_end[];
820 const int size = __dtb_testcases_end - __dtb_testcases_begin;
824 pr_warn("%s: No testcase data to attach; not running tests\n",
830 selftest_data = kmemdup(__dtb_testcases_begin, size, GFP_KERNEL);
832 if (!selftest_data) {
833 pr_warn("%s: Failed to allocate memory for selftest_data; "
834 "not running tests\n", __func__);
837 of_fdt_unflatten_tree(selftest_data, &selftest_data_node);
838 if (!selftest_data_node) {
839 pr_warn("%s: No tree to attach; not running tests\n", __func__);
842 of_node_set_flag(selftest_data_node, OF_DETACHED);
843 rc = of_resolve_phandles(selftest_data_node);
845 pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__, rc);
850 /* enabling flag for removing nodes */
851 selftest_live_tree = true;
852 of_allnodes = selftest_data_node;
854 for_each_of_allnodes(np)
855 __of_attach_node_sysfs(np);
856 of_aliases = of_find_node_by_path("/aliases");
857 of_chosen = of_find_node_by_path("/chosen");
861 /* attach the sub-tree to live tree */
862 return attach_node_and_children(selftest_data_node);
866 * detach_node_and_children - detaches node
867 * and its children from live tree
869 * @np: Node to detach from live tree
871 static void detach_node_and_children(struct device_node *np)
874 detach_node_and_children(np->child);
879 * selftest_data_remove - removes the selftest data
880 * nodes from the live tree
882 static void selftest_data_remove(void)
884 struct device_node *np;
885 struct property *prop;
887 if (selftest_live_tree) {
888 of_node_put(of_aliases);
889 of_node_put(of_chosen);
892 for_each_child_of_node(of_allnodes, np)
893 detach_node_and_children(np);
894 __of_detach_node_sysfs(of_allnodes);
899 while (last_node_index-- > 0) {
900 if (nodes[last_node_index]) {
901 np = of_find_node_by_path(nodes[last_node_index]->full_name);
902 if (np == nodes[last_node_index]) {
903 if (of_aliases == np) {
904 of_node_put(of_aliases);
907 detach_node_and_children(np);
909 for_each_property_of_node(np, prop) {
910 if (strcmp(prop->name, "testcase-alias") == 0)
911 of_remove_property(np, prop);
918 static int __init of_selftest(void)
920 struct device_node *np;
923 /* adding data for selftest */
924 res = selftest_data_add();
928 of_aliases = of_find_node_by_path("/aliases");
930 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
932 pr_info("No testcase data in device tree; not running tests\n");
937 pr_info("start of selftest - you will see error messages\n");
938 of_selftest_check_tree_linkage();
939 of_selftest_check_phandles();
940 of_selftest_find_node_by_name();
941 of_selftest_dynamic();
942 of_selftest_parse_phandle_with_args();
943 of_selftest_property_string();
944 of_selftest_property_copy();
945 of_selftest_changeset();
946 of_selftest_parse_interrupts();
947 of_selftest_parse_interrupts_extended();
948 of_selftest_match_node();
949 of_selftest_platform_populate();
951 /* removing selftest data from live tree */
952 selftest_data_remove();
954 /* Double check linkage after removing testcase data */
955 of_selftest_check_tree_linkage();
957 pr_info("end of selftest - %i passed, %i failed\n",
958 selftest_results.passed, selftest_results.failed);
962 late_initcall(of_selftest);