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>
12 #include <linux/of_fdt.h>
13 #include <linux/of_irq.h>
14 #include <linux/of_platform.h>
15 #include <linux/list.h>
16 #include <linux/mutex.h>
17 #include <linux/slab.h>
18 #include <linux/device.h>
19 #include <linux/platform_device.h>
20 #include <linux/of_platform.h>
22 #include <linux/i2c.h>
23 #include <linux/i2c-mux.h>
25 #include <linux/bitops.h>
27 #include "of_private.h"
29 static struct unittest_results {
34 #define unittest(result, fmt, ...) ({ \
35 bool failed = !(result); \
37 unittest_results.failed++; \
38 pr_err("FAIL %s():%i " fmt, __func__, __LINE__, ##__VA_ARGS__); \
40 unittest_results.passed++; \
41 pr_debug("pass %s():%i\n", __func__, __LINE__); \
46 static void __init of_unittest_find_node_by_name(void)
48 struct device_node *np;
51 np = of_find_node_by_path("/testcase-data");
52 unittest(np && !strcmp("/testcase-data", np->full_name),
53 "find /testcase-data failed\n");
56 /* Test if trailing '/' works */
57 np = of_find_node_by_path("/testcase-data/");
58 unittest(!np, "trailing '/' on /testcase-data/ should fail\n");
60 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
61 unittest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", np->full_name),
62 "find /testcase-data/phandle-tests/consumer-a failed\n");
65 np = of_find_node_by_path("testcase-alias");
66 unittest(np && !strcmp("/testcase-data", np->full_name),
67 "find testcase-alias failed\n");
70 /* Test if trailing '/' works on aliases */
71 np = of_find_node_by_path("testcase-alias/");
72 unittest(!np, "trailing '/' on testcase-alias/ should fail\n");
74 np = of_find_node_by_path("testcase-alias/phandle-tests/consumer-a");
75 unittest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", np->full_name),
76 "find testcase-alias/phandle-tests/consumer-a failed\n");
79 np = of_find_node_by_path("/testcase-data/missing-path");
80 unittest(!np, "non-existent path returned node %s\n", np->full_name);
83 np = of_find_node_by_path("missing-alias");
84 unittest(!np, "non-existent alias returned node %s\n", np->full_name);
87 np = of_find_node_by_path("testcase-alias/missing-path");
88 unittest(!np, "non-existent alias with relative path returned node %s\n", np->full_name);
91 np = of_find_node_opts_by_path("/testcase-data:testoption", &options);
92 unittest(np && !strcmp("testoption", options),
93 "option path test failed\n");
96 np = of_find_node_opts_by_path("/testcase-data:test/option", &options);
97 unittest(np && !strcmp("test/option", options),
98 "option path test, subcase #1 failed\n");
101 np = of_find_node_opts_by_path("/testcase-data/testcase-device1:test/option", &options);
102 unittest(np && !strcmp("test/option", options),
103 "option path test, subcase #2 failed\n");
106 np = of_find_node_opts_by_path("/testcase-data:testoption", NULL);
107 unittest(np, "NULL option path test failed\n");
110 np = of_find_node_opts_by_path("testcase-alias:testaliasoption",
112 unittest(np && !strcmp("testaliasoption", options),
113 "option alias path test failed\n");
116 np = of_find_node_opts_by_path("testcase-alias:test/alias/option",
118 unittest(np && !strcmp("test/alias/option", options),
119 "option alias path test, subcase #1 failed\n");
122 np = of_find_node_opts_by_path("testcase-alias:testaliasoption", NULL);
123 unittest(np, "NULL option alias path test failed\n");
126 options = "testoption";
127 np = of_find_node_opts_by_path("testcase-alias", &options);
128 unittest(np && !options, "option clearing test failed\n");
131 options = "testoption";
132 np = of_find_node_opts_by_path("/", &options);
133 unittest(np && !options, "option clearing root node test failed\n");
137 static void __init of_unittest_dynamic(void)
139 struct device_node *np;
140 struct property *prop;
142 np = of_find_node_by_path("/testcase-data");
144 pr_err("missing testcase data\n");
148 /* Array of 4 properties for the purpose of testing */
149 prop = kzalloc(sizeof(*prop) * 4, GFP_KERNEL);
151 unittest(0, "kzalloc() failed\n");
155 /* Add a new property - should pass*/
156 prop->name = "new-property";
157 prop->value = "new-property-data";
158 prop->length = strlen(prop->value) + 1;
159 unittest(of_add_property(np, prop) == 0, "Adding a new property failed\n");
161 /* Try to add an existing property - should fail */
163 prop->name = "new-property";
164 prop->value = "new-property-data-should-fail";
165 prop->length = strlen(prop->value) + 1;
166 unittest(of_add_property(np, prop) != 0,
167 "Adding an existing property should have failed\n");
169 /* Try to modify an existing property - should pass */
170 prop->value = "modify-property-data-should-pass";
171 prop->length = strlen(prop->value) + 1;
172 unittest(of_update_property(np, prop) == 0,
173 "Updating an existing property should have passed\n");
175 /* Try to modify non-existent property - should pass*/
177 prop->name = "modify-property";
178 prop->value = "modify-missing-property-data-should-pass";
179 prop->length = strlen(prop->value) + 1;
180 unittest(of_update_property(np, prop) == 0,
181 "Updating a missing property should have passed\n");
183 /* Remove property - should pass */
184 unittest(of_remove_property(np, prop) == 0,
185 "Removing a property should have passed\n");
187 /* Adding very large property - should pass */
189 prop->name = "large-property-PAGE_SIZEx8";
190 prop->length = PAGE_SIZE * 8;
191 prop->value = kzalloc(prop->length, GFP_KERNEL);
192 unittest(prop->value != NULL, "Unable to allocate large buffer\n");
194 unittest(of_add_property(np, prop) == 0,
195 "Adding a large property should have passed\n");
198 static int __init of_unittest_check_node_linkage(struct device_node *np)
200 struct device_node *child;
203 for_each_child_of_node(np, child) {
204 if (child->parent != np) {
205 pr_err("Child node %s links to wrong parent %s\n",
206 child->name, np->name);
211 rc = of_unittest_check_node_linkage(child);
223 static void __init of_unittest_check_tree_linkage(void)
225 struct device_node *np;
226 int allnode_count = 0, child_count;
231 for_each_of_allnodes(np)
233 child_count = of_unittest_check_node_linkage(of_root);
235 unittest(child_count > 0, "Device node data structure is corrupted\n");
236 unittest(child_count == allnode_count,
237 "allnodes list size (%i) doesn't match sibling lists size (%i)\n",
238 allnode_count, child_count);
239 pr_debug("allnodes list size (%i); sibling lists size (%i)\n", allnode_count, child_count);
243 struct hlist_node node;
244 struct device_node *np;
247 static DEFINE_HASHTABLE(phandle_ht, 8);
248 static void __init of_unittest_check_phandles(void)
250 struct device_node *np;
251 struct node_hash *nh;
252 struct hlist_node *tmp;
253 int i, dup_count = 0, phandle_count = 0;
255 for_each_of_allnodes(np) {
259 hash_for_each_possible(phandle_ht, nh, node, np->phandle) {
260 if (nh->np->phandle == np->phandle) {
261 pr_info("Duplicate phandle! %i used by %s and %s\n",
262 np->phandle, nh->np->full_name, np->full_name);
268 nh = kzalloc(sizeof(*nh), GFP_KERNEL);
273 hash_add(phandle_ht, &nh->node, np->phandle);
276 unittest(dup_count == 0, "Found %i duplicates in %i phandles\n",
277 dup_count, phandle_count);
280 hash_for_each_safe(phandle_ht, i, tmp, nh, node) {
286 static void __init of_unittest_parse_phandle_with_args(void)
288 struct device_node *np;
289 struct of_phandle_args args;
292 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
294 pr_err("missing testcase data\n");
298 rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
299 unittest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc);
301 for (i = 0; i < 8; i++) {
304 rc = of_parse_phandle_with_args(np, "phandle-list",
305 "#phandle-cells", i, &args);
307 /* Test the values from tests-phandle.dtsi */
311 passed &= (args.args_count == 1);
312 passed &= (args.args[0] == (i + 1));
316 passed &= (args.args_count == 2);
317 passed &= (args.args[0] == (i + 1));
318 passed &= (args.args[1] == 0);
321 passed &= (rc == -ENOENT);
325 passed &= (args.args_count == 3);
326 passed &= (args.args[0] == (i + 1));
327 passed &= (args.args[1] == 4);
328 passed &= (args.args[2] == 3);
332 passed &= (args.args_count == 2);
333 passed &= (args.args[0] == (i + 1));
334 passed &= (args.args[1] == 100);
338 passed &= (args.args_count == 0);
342 passed &= (args.args_count == 1);
343 passed &= (args.args[0] == (i + 1));
346 passed &= (rc == -ENOENT);
352 unittest(passed, "index %i - data error on node %s rc=%i\n",
353 i, args.np->full_name, rc);
356 /* Check for missing list property */
357 rc = of_parse_phandle_with_args(np, "phandle-list-missing",
358 "#phandle-cells", 0, &args);
359 unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
360 rc = of_count_phandle_with_args(np, "phandle-list-missing",
362 unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
364 /* Check for missing cells property */
365 rc = of_parse_phandle_with_args(np, "phandle-list",
366 "#phandle-cells-missing", 0, &args);
367 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
368 rc = of_count_phandle_with_args(np, "phandle-list",
369 "#phandle-cells-missing");
370 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
372 /* Check for bad phandle in list */
373 rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle",
374 "#phandle-cells", 0, &args);
375 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
376 rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle",
378 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
380 /* Check for incorrectly formed argument list */
381 rc = of_parse_phandle_with_args(np, "phandle-list-bad-args",
382 "#phandle-cells", 1, &args);
383 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
384 rc = of_count_phandle_with_args(np, "phandle-list-bad-args",
386 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
389 static void __init of_unittest_property_string(void)
391 const char *strings[4];
392 struct device_node *np;
395 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
397 pr_err("No testcase data in device tree\n");
401 rc = of_property_match_string(np, "phandle-list-names", "first");
402 unittest(rc == 0, "first expected:0 got:%i\n", rc);
403 rc = of_property_match_string(np, "phandle-list-names", "second");
404 unittest(rc == 1, "second expected:1 got:%i\n", rc);
405 rc = of_property_match_string(np, "phandle-list-names", "third");
406 unittest(rc == 2, "third expected:2 got:%i\n", rc);
407 rc = of_property_match_string(np, "phandle-list-names", "fourth");
408 unittest(rc == -ENODATA, "unmatched string; rc=%i\n", rc);
409 rc = of_property_match_string(np, "missing-property", "blah");
410 unittest(rc == -EINVAL, "missing property; rc=%i\n", rc);
411 rc = of_property_match_string(np, "empty-property", "blah");
412 unittest(rc == -ENODATA, "empty property; rc=%i\n", rc);
413 rc = of_property_match_string(np, "unterminated-string", "blah");
414 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
416 /* of_property_count_strings() tests */
417 rc = of_property_count_strings(np, "string-property");
418 unittest(rc == 1, "Incorrect string count; rc=%i\n", rc);
419 rc = of_property_count_strings(np, "phandle-list-names");
420 unittest(rc == 3, "Incorrect string count; rc=%i\n", rc);
421 rc = of_property_count_strings(np, "unterminated-string");
422 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
423 rc = of_property_count_strings(np, "unterminated-string-list");
424 unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
426 /* of_property_read_string_index() tests */
427 rc = of_property_read_string_index(np, "string-property", 0, strings);
428 unittest(rc == 0 && !strcmp(strings[0], "foobar"), "of_property_read_string_index() failure; rc=%i\n", rc);
430 rc = of_property_read_string_index(np, "string-property", 1, strings);
431 unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
432 rc = of_property_read_string_index(np, "phandle-list-names", 0, strings);
433 unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
434 rc = of_property_read_string_index(np, "phandle-list-names", 1, strings);
435 unittest(rc == 0 && !strcmp(strings[0], "second"), "of_property_read_string_index() failure; rc=%i\n", rc);
436 rc = of_property_read_string_index(np, "phandle-list-names", 2, strings);
437 unittest(rc == 0 && !strcmp(strings[0], "third"), "of_property_read_string_index() failure; rc=%i\n", rc);
439 rc = of_property_read_string_index(np, "phandle-list-names", 3, strings);
440 unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
442 rc = of_property_read_string_index(np, "unterminated-string", 0, strings);
443 unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
444 rc = of_property_read_string_index(np, "unterminated-string-list", 0, strings);
445 unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
447 rc = of_property_read_string_index(np, "unterminated-string-list", 2, strings); /* should fail */
448 unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
451 /* of_property_read_string_array() tests */
452 rc = of_property_read_string_array(np, "string-property", strings, 4);
453 unittest(rc == 1, "Incorrect string count; rc=%i\n", rc);
454 rc = of_property_read_string_array(np, "phandle-list-names", strings, 4);
455 unittest(rc == 3, "Incorrect string count; rc=%i\n", rc);
456 rc = of_property_read_string_array(np, "unterminated-string", strings, 4);
457 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
458 /* -- An incorrectly formed string should cause a failure */
459 rc = of_property_read_string_array(np, "unterminated-string-list", strings, 4);
460 unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
461 /* -- parsing the correctly formed strings should still work: */
463 rc = of_property_read_string_array(np, "unterminated-string-list", strings, 2);
464 unittest(rc == 2 && strings[2] == NULL, "of_property_read_string_array() failure; rc=%i\n", rc);
466 rc = of_property_read_string_array(np, "phandle-list-names", strings, 1);
467 unittest(rc == 1 && strings[1] == NULL, "Overwrote end of string array; rc=%i, str='%s'\n", rc, strings[1]);
470 #define propcmp(p1, p2) (((p1)->length == (p2)->length) && \
471 (p1)->value && (p2)->value && \
472 !memcmp((p1)->value, (p2)->value, (p1)->length) && \
473 !strcmp((p1)->name, (p2)->name))
474 static void __init of_unittest_property_copy(void)
476 #ifdef CONFIG_OF_DYNAMIC
477 struct property p1 = { .name = "p1", .length = 0, .value = "" };
478 struct property p2 = { .name = "p2", .length = 5, .value = "abcd" };
479 struct property *new;
481 new = __of_prop_dup(&p1, GFP_KERNEL);
482 unittest(new && propcmp(&p1, new), "empty property didn't copy correctly\n");
487 new = __of_prop_dup(&p2, GFP_KERNEL);
488 unittest(new && propcmp(&p2, new), "non-empty property didn't copy correctly\n");
495 static void __init of_unittest_changeset(void)
497 #ifdef CONFIG_OF_DYNAMIC
498 struct property *ppadd, padd = { .name = "prop-add", .length = 0, .value = "" };
499 struct property *ppupdate, pupdate = { .name = "prop-update", .length = 5, .value = "abcd" };
500 struct property *ppremove;
501 struct device_node *n1, *n2, *n21, *nremove, *parent, *np;
502 struct of_changeset chgset;
504 n1 = __of_node_dup(NULL, "/testcase-data/changeset/n1");
505 unittest(n1, "testcase setup failure\n");
506 n2 = __of_node_dup(NULL, "/testcase-data/changeset/n2");
507 unittest(n2, "testcase setup failure\n");
508 n21 = __of_node_dup(NULL, "%s/%s", "/testcase-data/changeset/n2", "n21");
509 unittest(n21, "testcase setup failure %p\n", n21);
510 nremove = of_find_node_by_path("/testcase-data/changeset/node-remove");
511 unittest(nremove, "testcase setup failure\n");
512 ppadd = __of_prop_dup(&padd, GFP_KERNEL);
513 unittest(ppadd, "testcase setup failure\n");
514 ppupdate = __of_prop_dup(&pupdate, GFP_KERNEL);
515 unittest(ppupdate, "testcase setup failure\n");
516 parent = nremove->parent;
521 ppremove = of_find_property(parent, "prop-remove", NULL);
522 unittest(ppremove, "failed to find removal prop");
524 of_changeset_init(&chgset);
525 unittest(!of_changeset_attach_node(&chgset, n1), "fail attach n1\n");
526 unittest(!of_changeset_attach_node(&chgset, n2), "fail attach n2\n");
527 unittest(!of_changeset_detach_node(&chgset, nremove), "fail remove node\n");
528 unittest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n");
529 unittest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop\n");
530 unittest(!of_changeset_update_property(&chgset, parent, ppupdate), "fail update prop\n");
531 unittest(!of_changeset_remove_property(&chgset, parent, ppremove), "fail remove prop\n");
532 unittest(!of_changeset_apply(&chgset), "apply failed\n");
534 /* Make sure node names are constructed correctly */
535 unittest((np = of_find_node_by_path("/testcase-data/changeset/n2/n21")),
536 "'%s' not added\n", n21->full_name);
539 unittest(!of_changeset_revert(&chgset), "revert failed\n");
541 of_changeset_destroy(&chgset);
545 static void __init of_unittest_parse_interrupts(void)
547 struct device_node *np;
548 struct of_phandle_args args;
551 if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)
554 np = of_find_node_by_path("/testcase-data/interrupts/interrupts0");
556 pr_err("missing testcase data\n");
560 for (i = 0; i < 4; i++) {
564 rc = of_irq_parse_one(np, i, &args);
567 passed &= (args.args_count == 1);
568 passed &= (args.args[0] == (i + 1));
570 unittest(passed, "index %i - data error on node %s rc=%i\n",
571 i, args.np->full_name, rc);
575 np = of_find_node_by_path("/testcase-data/interrupts/interrupts1");
577 pr_err("missing testcase data\n");
581 for (i = 0; i < 4; i++) {
585 rc = of_irq_parse_one(np, i, &args);
587 /* Test the values from tests-phandle.dtsi */
591 passed &= (args.args_count == 1);
592 passed &= (args.args[0] == 9);
596 passed &= (args.args_count == 3);
597 passed &= (args.args[0] == 10);
598 passed &= (args.args[1] == 11);
599 passed &= (args.args[2] == 12);
603 passed &= (args.args_count == 2);
604 passed &= (args.args[0] == 13);
605 passed &= (args.args[1] == 14);
609 passed &= (args.args_count == 2);
610 passed &= (args.args[0] == 15);
611 passed &= (args.args[1] == 16);
616 unittest(passed, "index %i - data error on node %s rc=%i\n",
617 i, args.np->full_name, rc);
622 static void __init of_unittest_parse_interrupts_extended(void)
624 struct device_node *np;
625 struct of_phandle_args args;
628 if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)
631 np = of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0");
633 pr_err("missing testcase data\n");
637 for (i = 0; i < 7; i++) {
640 rc = of_irq_parse_one(np, i, &args);
642 /* Test the values from tests-phandle.dtsi */
646 passed &= (args.args_count == 1);
647 passed &= (args.args[0] == 1);
651 passed &= (args.args_count == 3);
652 passed &= (args.args[0] == 2);
653 passed &= (args.args[1] == 3);
654 passed &= (args.args[2] == 4);
658 passed &= (args.args_count == 2);
659 passed &= (args.args[0] == 5);
660 passed &= (args.args[1] == 6);
664 passed &= (args.args_count == 1);
665 passed &= (args.args[0] == 9);
669 passed &= (args.args_count == 3);
670 passed &= (args.args[0] == 10);
671 passed &= (args.args[1] == 11);
672 passed &= (args.args[2] == 12);
676 passed &= (args.args_count == 2);
677 passed &= (args.args[0] == 13);
678 passed &= (args.args[1] == 14);
682 passed &= (args.args_count == 1);
683 passed &= (args.args[0] == 15);
689 unittest(passed, "index %i - data error on node %s rc=%i\n",
690 i, args.np->full_name, rc);
695 static const struct of_device_id match_node_table[] = {
696 { .data = "A", .name = "name0", }, /* Name alone is lowest priority */
697 { .data = "B", .type = "type1", }, /* followed by type alone */
699 { .data = "Ca", .name = "name2", .type = "type1", }, /* followed by both together */
700 { .data = "Cb", .name = "name2", }, /* Only match when type doesn't match */
701 { .data = "Cc", .name = "name2", .type = "type2", },
703 { .data = "E", .compatible = "compat3" },
704 { .data = "G", .compatible = "compat2", },
705 { .data = "H", .compatible = "compat2", .name = "name5", },
706 { .data = "I", .compatible = "compat2", .type = "type1", },
707 { .data = "J", .compatible = "compat2", .type = "type1", .name = "name8", },
708 { .data = "K", .compatible = "compat2", .name = "name9", },
715 } match_node_tests[] = {
716 { .path = "/testcase-data/match-node/name0", .data = "A", },
717 { .path = "/testcase-data/match-node/name1", .data = "B", },
718 { .path = "/testcase-data/match-node/a/name2", .data = "Ca", },
719 { .path = "/testcase-data/match-node/b/name2", .data = "Cb", },
720 { .path = "/testcase-data/match-node/c/name2", .data = "Cc", },
721 { .path = "/testcase-data/match-node/name3", .data = "E", },
722 { .path = "/testcase-data/match-node/name4", .data = "G", },
723 { .path = "/testcase-data/match-node/name5", .data = "H", },
724 { .path = "/testcase-data/match-node/name6", .data = "G", },
725 { .path = "/testcase-data/match-node/name7", .data = "I", },
726 { .path = "/testcase-data/match-node/name8", .data = "J", },
727 { .path = "/testcase-data/match-node/name9", .data = "K", },
730 static void __init of_unittest_match_node(void)
732 struct device_node *np;
733 const struct of_device_id *match;
736 for (i = 0; i < ARRAY_SIZE(match_node_tests); i++) {
737 np = of_find_node_by_path(match_node_tests[i].path);
739 unittest(0, "missing testcase node %s\n",
740 match_node_tests[i].path);
744 match = of_match_node(match_node_table, np);
746 unittest(0, "%s didn't match anything\n",
747 match_node_tests[i].path);
751 if (strcmp(match->data, match_node_tests[i].data) != 0) {
752 unittest(0, "%s got wrong match. expected %s, got %s\n",
753 match_node_tests[i].path, match_node_tests[i].data,
754 (const char *)match->data);
757 unittest(1, "passed");
761 static struct resource test_bus_res = {
764 .flags = IORESOURCE_MEM,
766 static const struct platform_device_info test_bus_info = {
767 .name = "unittest-bus",
769 static void __init of_unittest_platform_populate(void)
772 struct device_node *np, *child, *grandchild;
773 struct platform_device *pdev, *test_bus;
774 const struct of_device_id match[] = {
775 { .compatible = "test-device", },
779 np = of_find_node_by_path("/testcase-data");
780 of_platform_default_populate(np, NULL, NULL);
782 /* Test that a missing irq domain returns -EPROBE_DEFER */
783 np = of_find_node_by_path("/testcase-data/testcase-device1");
784 pdev = of_find_device_by_node(np);
785 unittest(pdev, "device 1 creation failed\n");
787 if (!(of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)) {
788 irq = platform_get_irq(pdev, 0);
789 unittest(irq == -EPROBE_DEFER,
790 "device deferred probe failed - %d\n", irq);
792 /* Test that a parsing failure does not return -EPROBE_DEFER */
793 np = of_find_node_by_path("/testcase-data/testcase-device2");
794 pdev = of_find_device_by_node(np);
795 unittest(pdev, "device 2 creation failed\n");
796 irq = platform_get_irq(pdev, 0);
797 unittest(irq < 0 && irq != -EPROBE_DEFER,
798 "device parsing error failed - %d\n", irq);
801 np = of_find_node_by_path("/testcase-data/platform-tests");
802 unittest(np, "No testcase data in device tree\n");
806 test_bus = platform_device_register_full(&test_bus_info);
807 rc = PTR_ERR_OR_ZERO(test_bus);
808 unittest(!rc, "testbus registration failed; rc=%i\n", rc);
811 test_bus->dev.of_node = np;
814 * Add a dummy resource to the test bus node after it is
815 * registered to catch problems with un-inserted resources. The
816 * DT code doesn't insert the resources, and it has caused the
817 * kernel to oops in the past. This makes sure the same bug
818 * doesn't crop up again.
820 platform_device_add_resources(test_bus, &test_bus_res, 1);
822 of_platform_populate(np, match, NULL, &test_bus->dev);
823 for_each_child_of_node(np, child) {
824 for_each_child_of_node(child, grandchild) {
825 pdev = of_find_device_by_node(grandchild);
827 "Could not create device for node '%s'\n",
833 of_platform_depopulate(&test_bus->dev);
834 for_each_child_of_node(np, child) {
835 for_each_child_of_node(child, grandchild)
836 unittest(!of_find_device_by_node(grandchild),
837 "device didn't get destroyed '%s'\n",
841 platform_device_unregister(test_bus);
846 * update_node_properties - adds the properties
847 * of np into dup node (present in live tree) and
848 * updates parent of children of np to dup.
850 * @np: node already present in live tree
851 * @dup: node present in live tree to be updated
853 static void update_node_properties(struct device_node *np,
854 struct device_node *dup)
856 struct property *prop;
857 struct device_node *child;
859 for_each_property_of_node(np, prop)
860 of_add_property(dup, prop);
862 for_each_child_of_node(np, child)
867 * attach_node_and_children - attaches nodes
868 * and its children to live tree
870 * @np: Node to attach to live tree
872 static int attach_node_and_children(struct device_node *np)
874 struct device_node *next, *dup, *child;
877 dup = of_find_node_by_path(np->full_name);
879 update_node_properties(np, dup);
886 mutex_lock(&of_mutex);
887 raw_spin_lock_irqsave(&devtree_lock, flags);
888 np->sibling = np->parent->child;
889 np->parent->child = np;
890 of_node_clear_flag(np, OF_DETACHED);
891 raw_spin_unlock_irqrestore(&devtree_lock, flags);
893 __of_attach_node_sysfs(np);
894 mutex_unlock(&of_mutex);
897 next = child->sibling;
898 attach_node_and_children(child);
906 * unittest_data_add - Reads, copies data from
907 * linked tree and attaches it to the live tree
909 static int __init unittest_data_add(void)
912 struct device_node *unittest_data_node, *np;
914 * __dtb_testcases_begin[] and __dtb_testcases_end[] are magically
915 * created by cmd_dt_S_dtb in scripts/Makefile.lib
917 extern uint8_t __dtb_testcases_begin[];
918 extern uint8_t __dtb_testcases_end[];
919 const int size = __dtb_testcases_end - __dtb_testcases_begin;
923 pr_warn("%s: No testcase data to attach; not running tests\n",
929 unittest_data = kmemdup(__dtb_testcases_begin, size, GFP_KERNEL);
931 if (!unittest_data) {
932 pr_warn("%s: Failed to allocate memory for unittest_data; "
933 "not running tests\n", __func__);
936 of_fdt_unflatten_tree(unittest_data, NULL, &unittest_data_node);
937 if (!unittest_data_node) {
938 pr_warn("%s: No tree to attach; not running tests\n", __func__);
939 kfree(unittest_data);
942 of_node_set_flag(unittest_data_node, OF_DETACHED);
943 rc = of_resolve_phandles(unittest_data_node);
945 pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__, rc);
950 of_root = unittest_data_node;
951 for_each_of_allnodes(np)
952 __of_attach_node_sysfs(np);
953 of_aliases = of_find_node_by_path("/aliases");
954 of_chosen = of_find_node_by_path("/chosen");
958 /* attach the sub-tree to live tree */
959 np = unittest_data_node->child;
961 struct device_node *next = np->sibling;
963 np->parent = of_root;
964 attach_node_and_children(np);
970 #ifdef CONFIG_OF_OVERLAY
972 static int unittest_probe(struct platform_device *pdev)
974 struct device *dev = &pdev->dev;
975 struct device_node *np = dev->of_node;
978 dev_err(dev, "No OF data for device\n");
983 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
985 of_platform_populate(np, NULL, NULL, &pdev->dev);
990 static int unittest_remove(struct platform_device *pdev)
992 struct device *dev = &pdev->dev;
993 struct device_node *np = dev->of_node;
995 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
999 static const struct of_device_id unittest_match[] = {
1000 { .compatible = "unittest", },
1004 static struct platform_driver unittest_driver = {
1005 .probe = unittest_probe,
1006 .remove = unittest_remove,
1009 .of_match_table = of_match_ptr(unittest_match),
1013 /* get the platform device instantiated at the path */
1014 static struct platform_device *of_path_to_platform_device(const char *path)
1016 struct device_node *np;
1017 struct platform_device *pdev;
1019 np = of_find_node_by_path(path);
1023 pdev = of_find_device_by_node(np);
1029 /* find out if a platform device exists at that path */
1030 static int of_path_platform_device_exists(const char *path)
1032 struct platform_device *pdev;
1034 pdev = of_path_to_platform_device(path);
1035 platform_device_put(pdev);
1036 return pdev != NULL;
1039 #if IS_BUILTIN(CONFIG_I2C)
1041 /* get the i2c client device instantiated at the path */
1042 static struct i2c_client *of_path_to_i2c_client(const char *path)
1044 struct device_node *np;
1045 struct i2c_client *client;
1047 np = of_find_node_by_path(path);
1051 client = of_find_i2c_device_by_node(np);
1057 /* find out if a i2c client device exists at that path */
1058 static int of_path_i2c_client_exists(const char *path)
1060 struct i2c_client *client;
1062 client = of_path_to_i2c_client(path);
1064 put_device(&client->dev);
1065 return client != NULL;
1068 static int of_path_i2c_client_exists(const char *path)
1079 static int of_path_device_type_exists(const char *path,
1080 enum overlay_type ovtype)
1084 return of_path_platform_device_exists(path);
1086 return of_path_i2c_client_exists(path);
1091 static const char *unittest_path(int nr, enum overlay_type ovtype)
1094 static char buf[256];
1098 base = "/testcase-data/overlay-node/test-bus";
1101 base = "/testcase-data/overlay-node/test-bus/i2c-test-bus";
1107 snprintf(buf, sizeof(buf) - 1, "%s/test-unittest%d", base, nr);
1108 buf[sizeof(buf) - 1] = '\0';
1112 static int of_unittest_device_exists(int unittest_nr, enum overlay_type ovtype)
1116 path = unittest_path(unittest_nr, ovtype);
1120 return of_path_platform_device_exists(path);
1122 return of_path_i2c_client_exists(path);
1127 static const char *overlay_path(int nr)
1129 static char buf[256];
1131 snprintf(buf, sizeof(buf) - 1,
1132 "/testcase-data/overlay%d", nr);
1133 buf[sizeof(buf) - 1] = '\0';
1138 static const char *bus_path = "/testcase-data/overlay-node/test-bus";
1140 /* it is guaranteed that overlay ids are assigned in sequence */
1141 #define MAX_UNITTEST_OVERLAYS 256
1142 static unsigned long overlay_id_bits[BITS_TO_LONGS(MAX_UNITTEST_OVERLAYS)];
1143 static int overlay_first_id = -1;
1145 static void of_unittest_track_overlay(int id)
1147 if (overlay_first_id < 0)
1148 overlay_first_id = id;
1149 id -= overlay_first_id;
1151 /* we shouldn't need that many */
1152 BUG_ON(id >= MAX_UNITTEST_OVERLAYS);
1153 overlay_id_bits[BIT_WORD(id)] |= BIT_MASK(id);
1156 static void of_unittest_untrack_overlay(int id)
1158 if (overlay_first_id < 0)
1160 id -= overlay_first_id;
1161 BUG_ON(id >= MAX_UNITTEST_OVERLAYS);
1162 overlay_id_bits[BIT_WORD(id)] &= ~BIT_MASK(id);
1165 static void of_unittest_destroy_tracked_overlays(void)
1167 int id, ret, defers;
1169 if (overlay_first_id < 0)
1172 /* try until no defers */
1175 /* remove in reverse order */
1176 for (id = MAX_UNITTEST_OVERLAYS - 1; id >= 0; id--) {
1177 if (!(overlay_id_bits[BIT_WORD(id)] & BIT_MASK(id)))
1180 ret = of_overlay_destroy(id + overlay_first_id);
1181 if (ret == -ENODEV) {
1182 pr_warn("%s: no overlay to destroy for #%d\n",
1183 __func__, id + overlay_first_id);
1188 pr_warn("%s: overlay destroy failed for #%d\n",
1189 __func__, id + overlay_first_id);
1193 overlay_id_bits[BIT_WORD(id)] &= ~BIT_MASK(id);
1195 } while (defers > 0);
1198 static int of_unittest_apply_overlay(int unittest_nr, int overlay_nr,
1201 struct device_node *np = NULL;
1204 np = of_find_node_by_path(overlay_path(overlay_nr));
1206 unittest(0, "could not find overlay node @\"%s\"\n",
1207 overlay_path(overlay_nr));
1212 ret = of_overlay_create(np);
1214 unittest(0, "could not create overlay from \"%s\"\n",
1215 overlay_path(overlay_nr));
1219 of_unittest_track_overlay(id);
1232 /* apply an overlay while checking before and after states */
1233 static int of_unittest_apply_overlay_check(int overlay_nr, int unittest_nr,
1234 int before, int after, enum overlay_type ovtype)
1238 /* unittest device must not be in before state */
1239 if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
1240 unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1241 overlay_path(overlay_nr),
1242 unittest_path(unittest_nr, ovtype),
1243 !before ? "enabled" : "disabled");
1247 ret = of_unittest_apply_overlay(overlay_nr, unittest_nr, NULL);
1249 /* of_unittest_apply_overlay already called unittest() */
1253 /* unittest device must be to set to after state */
1254 if (of_unittest_device_exists(unittest_nr, ovtype) != after) {
1255 unittest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n",
1256 overlay_path(overlay_nr),
1257 unittest_path(unittest_nr, ovtype),
1258 !after ? "enabled" : "disabled");
1265 /* apply an overlay and then revert it while checking before, after states */
1266 static int of_unittest_apply_revert_overlay_check(int overlay_nr,
1267 int unittest_nr, int before, int after,
1268 enum overlay_type ovtype)
1272 /* unittest device must be in before state */
1273 if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
1274 unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1275 overlay_path(overlay_nr),
1276 unittest_path(unittest_nr, ovtype),
1277 !before ? "enabled" : "disabled");
1281 /* apply the overlay */
1282 ret = of_unittest_apply_overlay(overlay_nr, unittest_nr, &ov_id);
1284 /* of_unittest_apply_overlay already called unittest() */
1288 /* unittest device must be in after state */
1289 if (of_unittest_device_exists(unittest_nr, ovtype) != after) {
1290 unittest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n",
1291 overlay_path(overlay_nr),
1292 unittest_path(unittest_nr, ovtype),
1293 !after ? "enabled" : "disabled");
1297 ret = of_overlay_destroy(ov_id);
1299 unittest(0, "overlay @\"%s\" failed to be destroyed @\"%s\"\n",
1300 overlay_path(overlay_nr),
1301 unittest_path(unittest_nr, ovtype));
1305 /* unittest device must be again in before state */
1306 if (of_unittest_device_exists(unittest_nr, PDEV_OVERLAY) != before) {
1307 unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1308 overlay_path(overlay_nr),
1309 unittest_path(unittest_nr, ovtype),
1310 !before ? "enabled" : "disabled");
1317 /* test activation of device */
1318 static void of_unittest_overlay_0(void)
1322 /* device should enable */
1323 ret = of_unittest_apply_overlay_check(0, 0, 0, 1, PDEV_OVERLAY);
1327 unittest(1, "overlay test %d passed\n", 0);
1330 /* test deactivation of device */
1331 static void of_unittest_overlay_1(void)
1335 /* device should disable */
1336 ret = of_unittest_apply_overlay_check(1, 1, 1, 0, PDEV_OVERLAY);
1340 unittest(1, "overlay test %d passed\n", 1);
1343 /* test activation of device */
1344 static void of_unittest_overlay_2(void)
1348 /* device should enable */
1349 ret = of_unittest_apply_overlay_check(2, 2, 0, 1, PDEV_OVERLAY);
1353 unittest(1, "overlay test %d passed\n", 2);
1356 /* test deactivation of device */
1357 static void of_unittest_overlay_3(void)
1361 /* device should disable */
1362 ret = of_unittest_apply_overlay_check(3, 3, 1, 0, PDEV_OVERLAY);
1366 unittest(1, "overlay test %d passed\n", 3);
1369 /* test activation of a full device node */
1370 static void of_unittest_overlay_4(void)
1374 /* device should disable */
1375 ret = of_unittest_apply_overlay_check(4, 4, 0, 1, PDEV_OVERLAY);
1379 unittest(1, "overlay test %d passed\n", 4);
1382 /* test overlay apply/revert sequence */
1383 static void of_unittest_overlay_5(void)
1387 /* device should disable */
1388 ret = of_unittest_apply_revert_overlay_check(5, 5, 0, 1, PDEV_OVERLAY);
1392 unittest(1, "overlay test %d passed\n", 5);
1395 /* test overlay application in sequence */
1396 static void of_unittest_overlay_6(void)
1398 struct device_node *np;
1399 int ret, i, ov_id[2];
1400 int overlay_nr = 6, unittest_nr = 6;
1401 int before = 0, after = 1;
1403 /* unittest device must be in before state */
1404 for (i = 0; i < 2; i++) {
1405 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
1407 unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1408 overlay_path(overlay_nr + i),
1409 unittest_path(unittest_nr + i,
1411 !before ? "enabled" : "disabled");
1416 /* apply the overlays */
1417 for (i = 0; i < 2; i++) {
1419 np = of_find_node_by_path(overlay_path(overlay_nr + i));
1421 unittest(0, "could not find overlay node @\"%s\"\n",
1422 overlay_path(overlay_nr + i));
1426 ret = of_overlay_create(np);
1428 unittest(0, "could not create overlay from \"%s\"\n",
1429 overlay_path(overlay_nr + i));
1433 of_unittest_track_overlay(ov_id[i]);
1436 for (i = 0; i < 2; i++) {
1437 /* unittest device must be in after state */
1438 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
1440 unittest(0, "overlay @\"%s\" failed @\"%s\" %s\n",
1441 overlay_path(overlay_nr + i),
1442 unittest_path(unittest_nr + i,
1444 !after ? "enabled" : "disabled");
1449 for (i = 1; i >= 0; i--) {
1450 ret = of_overlay_destroy(ov_id[i]);
1452 unittest(0, "overlay @\"%s\" failed destroy @\"%s\"\n",
1453 overlay_path(overlay_nr + i),
1454 unittest_path(unittest_nr + i,
1458 of_unittest_untrack_overlay(ov_id[i]);
1461 for (i = 0; i < 2; i++) {
1462 /* unittest device must be again in before state */
1463 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
1465 unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1466 overlay_path(overlay_nr + i),
1467 unittest_path(unittest_nr + i,
1469 !before ? "enabled" : "disabled");
1474 unittest(1, "overlay test %d passed\n", 6);
1477 /* test overlay application in sequence */
1478 static void of_unittest_overlay_8(void)
1480 struct device_node *np;
1481 int ret, i, ov_id[2];
1482 int overlay_nr = 8, unittest_nr = 8;
1484 /* we don't care about device state in this test */
1486 /* apply the overlays */
1487 for (i = 0; i < 2; i++) {
1489 np = of_find_node_by_path(overlay_path(overlay_nr + i));
1491 unittest(0, "could not find overlay node @\"%s\"\n",
1492 overlay_path(overlay_nr + i));
1496 ret = of_overlay_create(np);
1498 unittest(0, "could not create overlay from \"%s\"\n",
1499 overlay_path(overlay_nr + i));
1503 of_unittest_track_overlay(ov_id[i]);
1506 /* now try to remove first overlay (it should fail) */
1507 ret = of_overlay_destroy(ov_id[0]);
1509 unittest(0, "overlay @\"%s\" was destroyed @\"%s\"\n",
1510 overlay_path(overlay_nr + 0),
1511 unittest_path(unittest_nr,
1516 /* removing them in order should work */
1517 for (i = 1; i >= 0; i--) {
1518 ret = of_overlay_destroy(ov_id[i]);
1520 unittest(0, "overlay @\"%s\" not destroyed @\"%s\"\n",
1521 overlay_path(overlay_nr + i),
1522 unittest_path(unittest_nr,
1526 of_unittest_untrack_overlay(ov_id[i]);
1529 unittest(1, "overlay test %d passed\n", 8);
1532 /* test insertion of a bus with parent devices */
1533 static void of_unittest_overlay_10(void)
1538 /* device should disable */
1539 ret = of_unittest_apply_overlay_check(10, 10, 0, 1, PDEV_OVERLAY);
1540 if (unittest(ret == 0,
1541 "overlay test %d failed; overlay application\n", 10))
1544 child_path = kasprintf(GFP_KERNEL, "%s/test-unittest101",
1545 unittest_path(10, PDEV_OVERLAY));
1546 if (unittest(child_path, "overlay test %d failed; kasprintf\n", 10))
1549 ret = of_path_device_type_exists(child_path, PDEV_OVERLAY);
1551 if (unittest(ret, "overlay test %d failed; no child device\n", 10))
1555 /* test insertion of a bus with parent devices (and revert) */
1556 static void of_unittest_overlay_11(void)
1560 /* device should disable */
1561 ret = of_unittest_apply_revert_overlay_check(11, 11, 0, 1,
1563 if (unittest(ret == 0,
1564 "overlay test %d failed; overlay application\n", 11))
1568 #if IS_BUILTIN(CONFIG_I2C) && IS_ENABLED(CONFIG_OF_OVERLAY)
1570 struct unittest_i2c_bus_data {
1571 struct platform_device *pdev;
1572 struct i2c_adapter adap;
1575 static int unittest_i2c_master_xfer(struct i2c_adapter *adap,
1576 struct i2c_msg *msgs, int num)
1578 struct unittest_i2c_bus_data *std = i2c_get_adapdata(adap);
1585 static u32 unittest_i2c_functionality(struct i2c_adapter *adap)
1587 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
1590 static const struct i2c_algorithm unittest_i2c_algo = {
1591 .master_xfer = unittest_i2c_master_xfer,
1592 .functionality = unittest_i2c_functionality,
1595 static int unittest_i2c_bus_probe(struct platform_device *pdev)
1597 struct device *dev = &pdev->dev;
1598 struct device_node *np = dev->of_node;
1599 struct unittest_i2c_bus_data *std;
1600 struct i2c_adapter *adap;
1604 dev_err(dev, "No OF data for device\n");
1609 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1611 std = devm_kzalloc(dev, sizeof(*std), GFP_KERNEL);
1613 dev_err(dev, "Failed to allocate unittest i2c data\n");
1617 /* link them together */
1619 platform_set_drvdata(pdev, std);
1622 i2c_set_adapdata(adap, std);
1624 strlcpy(adap->name, pdev->name, sizeof(adap->name));
1625 adap->class = I2C_CLASS_DEPRECATED;
1626 adap->algo = &unittest_i2c_algo;
1627 adap->dev.parent = dev;
1628 adap->dev.of_node = dev->of_node;
1629 adap->timeout = 5 * HZ;
1632 ret = i2c_add_numbered_adapter(adap);
1634 dev_err(dev, "Failed to add I2C adapter\n");
1641 static int unittest_i2c_bus_remove(struct platform_device *pdev)
1643 struct device *dev = &pdev->dev;
1644 struct device_node *np = dev->of_node;
1645 struct unittest_i2c_bus_data *std = platform_get_drvdata(pdev);
1647 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1648 i2c_del_adapter(&std->adap);
1653 static const struct of_device_id unittest_i2c_bus_match[] = {
1654 { .compatible = "unittest-i2c-bus", },
1658 static struct platform_driver unittest_i2c_bus_driver = {
1659 .probe = unittest_i2c_bus_probe,
1660 .remove = unittest_i2c_bus_remove,
1662 .name = "unittest-i2c-bus",
1663 .of_match_table = of_match_ptr(unittest_i2c_bus_match),
1667 static int unittest_i2c_dev_probe(struct i2c_client *client,
1668 const struct i2c_device_id *id)
1670 struct device *dev = &client->dev;
1671 struct device_node *np = client->dev.of_node;
1674 dev_err(dev, "No OF node\n");
1678 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1683 static int unittest_i2c_dev_remove(struct i2c_client *client)
1685 struct device *dev = &client->dev;
1686 struct device_node *np = client->dev.of_node;
1688 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1692 static const struct i2c_device_id unittest_i2c_dev_id[] = {
1693 { .name = "unittest-i2c-dev" },
1697 static struct i2c_driver unittest_i2c_dev_driver = {
1699 .name = "unittest-i2c-dev",
1701 .probe = unittest_i2c_dev_probe,
1702 .remove = unittest_i2c_dev_remove,
1703 .id_table = unittest_i2c_dev_id,
1706 #if IS_BUILTIN(CONFIG_I2C_MUX)
1708 static int unittest_i2c_mux_select_chan(struct i2c_mux_core *muxc, u32 chan)
1713 static int unittest_i2c_mux_probe(struct i2c_client *client,
1714 const struct i2c_device_id *id)
1717 struct device *dev = &client->dev;
1718 struct i2c_adapter *adap = to_i2c_adapter(dev->parent);
1719 struct device_node *np = client->dev.of_node, *child;
1720 struct i2c_mux_core *muxc;
1723 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1726 dev_err(dev, "No OF node\n");
1731 for_each_child_of_node(np, child) {
1732 ret = of_property_read_u32(child, "reg", ®);
1735 if (max_reg == (u32)-1 || reg > max_reg)
1738 nchans = max_reg == (u32)-1 ? 0 : max_reg + 1;
1740 dev_err(dev, "No channels\n");
1744 muxc = i2c_mux_alloc(adap, dev, nchans, 0, 0,
1745 unittest_i2c_mux_select_chan, NULL);
1748 for (i = 0; i < nchans; i++) {
1749 ret = i2c_mux_add_adapter(muxc, 0, i, 0);
1751 dev_err(dev, "Failed to register mux #%d\n", i);
1752 i2c_mux_del_adapters(muxc);
1757 i2c_set_clientdata(client, muxc);
1762 static int unittest_i2c_mux_remove(struct i2c_client *client)
1764 struct device *dev = &client->dev;
1765 struct device_node *np = client->dev.of_node;
1766 struct i2c_mux_core *muxc = i2c_get_clientdata(client);
1768 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1769 i2c_mux_del_adapters(muxc);
1773 static const struct i2c_device_id unittest_i2c_mux_id[] = {
1774 { .name = "unittest-i2c-mux" },
1778 static struct i2c_driver unittest_i2c_mux_driver = {
1780 .name = "unittest-i2c-mux",
1782 .probe = unittest_i2c_mux_probe,
1783 .remove = unittest_i2c_mux_remove,
1784 .id_table = unittest_i2c_mux_id,
1789 static int of_unittest_overlay_i2c_init(void)
1793 ret = i2c_add_driver(&unittest_i2c_dev_driver);
1794 if (unittest(ret == 0,
1795 "could not register unittest i2c device driver\n"))
1798 ret = platform_driver_register(&unittest_i2c_bus_driver);
1799 if (unittest(ret == 0,
1800 "could not register unittest i2c bus driver\n"))
1803 #if IS_BUILTIN(CONFIG_I2C_MUX)
1804 ret = i2c_add_driver(&unittest_i2c_mux_driver);
1805 if (unittest(ret == 0,
1806 "could not register unittest i2c mux driver\n"))
1813 static void of_unittest_overlay_i2c_cleanup(void)
1815 #if IS_BUILTIN(CONFIG_I2C_MUX)
1816 i2c_del_driver(&unittest_i2c_mux_driver);
1818 platform_driver_unregister(&unittest_i2c_bus_driver);
1819 i2c_del_driver(&unittest_i2c_dev_driver);
1822 static void of_unittest_overlay_i2c_12(void)
1826 /* device should enable */
1827 ret = of_unittest_apply_overlay_check(12, 12, 0, 1, I2C_OVERLAY);
1831 unittest(1, "overlay test %d passed\n", 12);
1834 /* test deactivation of device */
1835 static void of_unittest_overlay_i2c_13(void)
1839 /* device should disable */
1840 ret = of_unittest_apply_overlay_check(13, 13, 1, 0, I2C_OVERLAY);
1844 unittest(1, "overlay test %d passed\n", 13);
1847 /* just check for i2c mux existence */
1848 static void of_unittest_overlay_i2c_14(void)
1852 static void of_unittest_overlay_i2c_15(void)
1856 /* device should enable */
1857 ret = of_unittest_apply_overlay_check(16, 15, 0, 1, I2C_OVERLAY);
1861 unittest(1, "overlay test %d passed\n", 15);
1866 static inline void of_unittest_overlay_i2c_14(void) { }
1867 static inline void of_unittest_overlay_i2c_15(void) { }
1871 static void __init of_unittest_overlay(void)
1873 struct device_node *bus_np = NULL;
1876 ret = platform_driver_register(&unittest_driver);
1878 unittest(0, "could not register unittest driver\n");
1882 bus_np = of_find_node_by_path(bus_path);
1883 if (bus_np == NULL) {
1884 unittest(0, "could not find bus_path \"%s\"\n", bus_path);
1888 ret = of_platform_default_populate(bus_np, NULL, NULL);
1890 unittest(0, "could not populate bus @ \"%s\"\n", bus_path);
1894 if (!of_unittest_device_exists(100, PDEV_OVERLAY)) {
1895 unittest(0, "could not find unittest0 @ \"%s\"\n",
1896 unittest_path(100, PDEV_OVERLAY));
1900 if (of_unittest_device_exists(101, PDEV_OVERLAY)) {
1901 unittest(0, "unittest1 @ \"%s\" should not exist\n",
1902 unittest_path(101, PDEV_OVERLAY));
1906 unittest(1, "basic infrastructure of overlays passed");
1908 /* tests in sequence */
1909 of_unittest_overlay_0();
1910 of_unittest_overlay_1();
1911 of_unittest_overlay_2();
1912 of_unittest_overlay_3();
1913 of_unittest_overlay_4();
1914 of_unittest_overlay_5();
1915 of_unittest_overlay_6();
1916 of_unittest_overlay_8();
1918 of_unittest_overlay_10();
1919 of_unittest_overlay_11();
1921 #if IS_BUILTIN(CONFIG_I2C)
1922 if (unittest(of_unittest_overlay_i2c_init() == 0, "i2c init failed\n"))
1925 of_unittest_overlay_i2c_12();
1926 of_unittest_overlay_i2c_13();
1927 of_unittest_overlay_i2c_14();
1928 of_unittest_overlay_i2c_15();
1930 of_unittest_overlay_i2c_cleanup();
1933 of_unittest_destroy_tracked_overlays();
1936 of_node_put(bus_np);
1940 static inline void __init of_unittest_overlay(void) { }
1943 static int __init of_unittest(void)
1945 struct device_node *np;
1948 /* adding data for unittest */
1949 res = unittest_data_add();
1953 of_aliases = of_find_node_by_path("/aliases");
1955 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
1957 pr_info("No testcase data in device tree; not running tests\n");
1962 pr_info("start of unittest - you will see error messages\n");
1963 of_unittest_check_tree_linkage();
1964 of_unittest_check_phandles();
1965 of_unittest_find_node_by_name();
1966 of_unittest_dynamic();
1967 of_unittest_parse_phandle_with_args();
1968 of_unittest_property_string();
1969 of_unittest_property_copy();
1970 of_unittest_changeset();
1971 of_unittest_parse_interrupts();
1972 of_unittest_parse_interrupts_extended();
1973 of_unittest_match_node();
1974 of_unittest_platform_populate();
1975 of_unittest_overlay();
1977 /* Double check linkage after removing testcase data */
1978 of_unittest_check_tree_linkage();
1980 pr_info("end of unittest - %i passed, %i failed\n",
1981 unittest_results.passed, unittest_results.failed);
1985 late_initcall(of_unittest);