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>
20 #include <linux/platform_device.h>
21 #include <linux/of_platform.h>
23 #include <linux/i2c.h>
24 #include <linux/i2c-mux.h>
26 #include <linux/bitops.h>
28 #include "of_private.h"
30 static struct unittest_results {
35 #define unittest(result, fmt, ...) ({ \
36 bool failed = !(result); \
38 unittest_results.failed++; \
39 pr_err("FAIL %s():%i " fmt, __func__, __LINE__, ##__VA_ARGS__); \
41 unittest_results.passed++; \
42 pr_debug("pass %s():%i\n", __func__, __LINE__); \
47 static void __init of_unittest_find_node_by_name(void)
49 struct device_node *np;
52 np = of_find_node_by_path("/testcase-data");
53 unittest(np && !strcmp("/testcase-data", np->full_name),
54 "find /testcase-data failed\n");
57 /* Test if trailing '/' works */
58 np = of_find_node_by_path("/testcase-data/");
59 unittest(!np, "trailing '/' on /testcase-data/ should fail\n");
61 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
62 unittest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", np->full_name),
63 "find /testcase-data/phandle-tests/consumer-a failed\n");
66 np = of_find_node_by_path("testcase-alias");
67 unittest(np && !strcmp("/testcase-data", np->full_name),
68 "find testcase-alias failed\n");
71 /* Test if trailing '/' works on aliases */
72 np = of_find_node_by_path("testcase-alias/");
73 unittest(!np, "trailing '/' on testcase-alias/ should fail\n");
75 np = of_find_node_by_path("testcase-alias/phandle-tests/consumer-a");
76 unittest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", np->full_name),
77 "find testcase-alias/phandle-tests/consumer-a failed\n");
80 np = of_find_node_by_path("/testcase-data/missing-path");
81 unittest(!np, "non-existent path returned node %s\n", np->full_name);
84 np = of_find_node_by_path("missing-alias");
85 unittest(!np, "non-existent alias returned node %s\n", np->full_name);
88 np = of_find_node_by_path("testcase-alias/missing-path");
89 unittest(!np, "non-existent alias with relative path returned node %s\n", np->full_name);
92 np = of_find_node_opts_by_path("/testcase-data:testoption", &options);
93 unittest(np && !strcmp("testoption", options),
94 "option path test failed\n");
97 np = of_find_node_opts_by_path("/testcase-data:test/option", &options);
98 unittest(np && !strcmp("test/option", options),
99 "option path test, subcase #1 failed\n");
102 np = of_find_node_opts_by_path("/testcase-data/testcase-device1:test/option", &options);
103 unittest(np && !strcmp("test/option", options),
104 "option path test, subcase #2 failed\n");
107 np = of_find_node_opts_by_path("/testcase-data:testoption", NULL);
108 unittest(np, "NULL option path test failed\n");
111 np = of_find_node_opts_by_path("testcase-alias:testaliasoption",
113 unittest(np && !strcmp("testaliasoption", options),
114 "option alias path test failed\n");
117 np = of_find_node_opts_by_path("testcase-alias:test/alias/option",
119 unittest(np && !strcmp("test/alias/option", options),
120 "option alias path test, subcase #1 failed\n");
123 np = of_find_node_opts_by_path("testcase-alias:testaliasoption", NULL);
124 unittest(np, "NULL option alias path test failed\n");
127 options = "testoption";
128 np = of_find_node_opts_by_path("testcase-alias", &options);
129 unittest(np && !options, "option clearing test failed\n");
132 options = "testoption";
133 np = of_find_node_opts_by_path("/", &options);
134 unittest(np && !options, "option clearing root node test failed\n");
138 static void __init of_unittest_dynamic(void)
140 struct device_node *np;
141 struct property *prop;
143 np = of_find_node_by_path("/testcase-data");
145 pr_err("missing testcase data\n");
149 /* Array of 4 properties for the purpose of testing */
150 prop = kzalloc(sizeof(*prop) * 4, GFP_KERNEL);
152 unittest(0, "kzalloc() failed\n");
156 /* Add a new property - should pass*/
157 prop->name = "new-property";
158 prop->value = "new-property-data";
159 prop->length = strlen(prop->value);
160 unittest(of_add_property(np, prop) == 0, "Adding a new property failed\n");
162 /* Try to add an existing property - should fail */
164 prop->name = "new-property";
165 prop->value = "new-property-data-should-fail";
166 prop->length = strlen(prop->value);
167 unittest(of_add_property(np, prop) != 0,
168 "Adding an existing property should have failed\n");
170 /* Try to modify an existing property - should pass */
171 prop->value = "modify-property-data-should-pass";
172 prop->length = strlen(prop->value);
173 unittest(of_update_property(np, prop) == 0,
174 "Updating an existing property should have passed\n");
176 /* Try to modify non-existent property - should pass*/
178 prop->name = "modify-property";
179 prop->value = "modify-missing-property-data-should-pass";
180 prop->length = strlen(prop->value);
181 unittest(of_update_property(np, prop) == 0,
182 "Updating a missing property should have passed\n");
184 /* Remove property - should pass */
185 unittest(of_remove_property(np, prop) == 0,
186 "Removing a property should have passed\n");
188 /* Adding very large property - should pass */
190 prop->name = "large-property-PAGE_SIZEx8";
191 prop->length = PAGE_SIZE * 8;
192 prop->value = kzalloc(prop->length, GFP_KERNEL);
193 unittest(prop->value != NULL, "Unable to allocate large buffer\n");
195 unittest(of_add_property(np, prop) == 0,
196 "Adding a large property should have passed\n");
199 static int __init of_unittest_check_node_linkage(struct device_node *np)
201 struct device_node *child;
204 for_each_child_of_node(np, child) {
205 if (child->parent != np) {
206 pr_err("Child node %s links to wrong parent %s\n",
207 child->name, np->name);
212 rc = of_unittest_check_node_linkage(child);
224 static void __init of_unittest_check_tree_linkage(void)
226 struct device_node *np;
227 int allnode_count = 0, child_count;
232 for_each_of_allnodes(np)
234 child_count = of_unittest_check_node_linkage(of_root);
236 unittest(child_count > 0, "Device node data structure is corrupted\n");
237 unittest(child_count == allnode_count,
238 "allnodes list size (%i) doesn't match sibling lists size (%i)\n",
239 allnode_count, child_count);
240 pr_debug("allnodes list size (%i); sibling lists size (%i)\n", allnode_count, child_count);
244 struct hlist_node node;
245 struct device_node *np;
248 static DEFINE_HASHTABLE(phandle_ht, 8);
249 static void __init of_unittest_check_phandles(void)
251 struct device_node *np;
252 struct node_hash *nh;
253 struct hlist_node *tmp;
254 int i, dup_count = 0, phandle_count = 0;
256 for_each_of_allnodes(np) {
260 hash_for_each_possible(phandle_ht, nh, node, np->phandle) {
261 if (nh->np->phandle == np->phandle) {
262 pr_info("Duplicate phandle! %i used by %s and %s\n",
263 np->phandle, nh->np->full_name, np->full_name);
269 nh = kzalloc(sizeof(*nh), GFP_KERNEL);
274 hash_add(phandle_ht, &nh->node, np->phandle);
277 unittest(dup_count == 0, "Found %i duplicates in %i phandles\n",
278 dup_count, phandle_count);
281 hash_for_each_safe(phandle_ht, i, tmp, nh, node) {
287 static void __init of_unittest_parse_phandle_with_args(void)
289 struct device_node *np;
290 struct of_phandle_args args;
293 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
295 pr_err("missing testcase data\n");
299 rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
300 unittest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc);
302 for (i = 0; i < 8; i++) {
305 rc = of_parse_phandle_with_args(np, "phandle-list",
306 "#phandle-cells", i, &args);
308 /* Test the values from tests-phandle.dtsi */
312 passed &= (args.args_count == 1);
313 passed &= (args.args[0] == (i + 1));
317 passed &= (args.args_count == 2);
318 passed &= (args.args[0] == (i + 1));
319 passed &= (args.args[1] == 0);
322 passed &= (rc == -ENOENT);
326 passed &= (args.args_count == 3);
327 passed &= (args.args[0] == (i + 1));
328 passed &= (args.args[1] == 4);
329 passed &= (args.args[2] == 3);
333 passed &= (args.args_count == 2);
334 passed &= (args.args[0] == (i + 1));
335 passed &= (args.args[1] == 100);
339 passed &= (args.args_count == 0);
343 passed &= (args.args_count == 1);
344 passed &= (args.args[0] == (i + 1));
347 passed &= (rc == -ENOENT);
353 unittest(passed, "index %i - data error on node %s rc=%i\n",
354 i, args.np->full_name, rc);
357 /* Check for missing list property */
358 rc = of_parse_phandle_with_args(np, "phandle-list-missing",
359 "#phandle-cells", 0, &args);
360 unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
361 rc = of_count_phandle_with_args(np, "phandle-list-missing",
363 unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
365 /* Check for missing cells property */
366 rc = of_parse_phandle_with_args(np, "phandle-list",
367 "#phandle-cells-missing", 0, &args);
368 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
369 rc = of_count_phandle_with_args(np, "phandle-list",
370 "#phandle-cells-missing");
371 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
373 /* Check for bad phandle in list */
374 rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle",
375 "#phandle-cells", 0, &args);
376 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
377 rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle",
379 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
381 /* Check for incorrectly formed argument list */
382 rc = of_parse_phandle_with_args(np, "phandle-list-bad-args",
383 "#phandle-cells", 1, &args);
384 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
385 rc = of_count_phandle_with_args(np, "phandle-list-bad-args",
387 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
390 static void __init of_unittest_property_string(void)
392 const char *strings[4];
393 struct device_node *np;
396 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
398 pr_err("No testcase data in device tree\n");
402 rc = of_property_match_string(np, "phandle-list-names", "first");
403 unittest(rc == 0, "first expected:0 got:%i\n", rc);
404 rc = of_property_match_string(np, "phandle-list-names", "second");
405 unittest(rc == 1, "second expected:1 got:%i\n", rc);
406 rc = of_property_match_string(np, "phandle-list-names", "third");
407 unittest(rc == 2, "third expected:2 got:%i\n", rc);
408 rc = of_property_match_string(np, "phandle-list-names", "fourth");
409 unittest(rc == -ENODATA, "unmatched string; rc=%i\n", rc);
410 rc = of_property_match_string(np, "missing-property", "blah");
411 unittest(rc == -EINVAL, "missing property; rc=%i\n", rc);
412 rc = of_property_match_string(np, "empty-property", "blah");
413 unittest(rc == -ENODATA, "empty property; rc=%i\n", rc);
414 rc = of_property_match_string(np, "unterminated-string", "blah");
415 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
417 /* of_property_count_strings() tests */
418 rc = of_property_count_strings(np, "string-property");
419 unittest(rc == 1, "Incorrect string count; rc=%i\n", rc);
420 rc = of_property_count_strings(np, "phandle-list-names");
421 unittest(rc == 3, "Incorrect string count; rc=%i\n", rc);
422 rc = of_property_count_strings(np, "unterminated-string");
423 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
424 rc = of_property_count_strings(np, "unterminated-string-list");
425 unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
427 /* of_property_read_string_index() tests */
428 rc = of_property_read_string_index(np, "string-property", 0, strings);
429 unittest(rc == 0 && !strcmp(strings[0], "foobar"), "of_property_read_string_index() failure; rc=%i\n", rc);
431 rc = of_property_read_string_index(np, "string-property", 1, strings);
432 unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
433 rc = of_property_read_string_index(np, "phandle-list-names", 0, strings);
434 unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
435 rc = of_property_read_string_index(np, "phandle-list-names", 1, strings);
436 unittest(rc == 0 && !strcmp(strings[0], "second"), "of_property_read_string_index() failure; rc=%i\n", rc);
437 rc = of_property_read_string_index(np, "phandle-list-names", 2, strings);
438 unittest(rc == 0 && !strcmp(strings[0], "third"), "of_property_read_string_index() failure; rc=%i\n", rc);
440 rc = of_property_read_string_index(np, "phandle-list-names", 3, strings);
441 unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
443 rc = of_property_read_string_index(np, "unterminated-string", 0, strings);
444 unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
445 rc = of_property_read_string_index(np, "unterminated-string-list", 0, strings);
446 unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
448 rc = of_property_read_string_index(np, "unterminated-string-list", 2, strings); /* should fail */
449 unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
452 /* of_property_read_string_array() tests */
453 rc = of_property_read_string_array(np, "string-property", strings, 4);
454 unittest(rc == 1, "Incorrect string count; rc=%i\n", rc);
455 rc = of_property_read_string_array(np, "phandle-list-names", strings, 4);
456 unittest(rc == 3, "Incorrect string count; rc=%i\n", rc);
457 rc = of_property_read_string_array(np, "unterminated-string", strings, 4);
458 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
459 /* -- An incorrectly formed string should cause a failure */
460 rc = of_property_read_string_array(np, "unterminated-string-list", strings, 4);
461 unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
462 /* -- parsing the correctly formed strings should still work: */
464 rc = of_property_read_string_array(np, "unterminated-string-list", strings, 2);
465 unittest(rc == 2 && strings[2] == NULL, "of_property_read_string_array() failure; rc=%i\n", rc);
467 rc = of_property_read_string_array(np, "phandle-list-names", strings, 1);
468 unittest(rc == 1 && strings[1] == NULL, "Overwrote end of string array; rc=%i, str='%s'\n", rc, strings[1]);
471 #define propcmp(p1, p2) (((p1)->length == (p2)->length) && \
472 (p1)->value && (p2)->value && \
473 !memcmp((p1)->value, (p2)->value, (p1)->length) && \
474 !strcmp((p1)->name, (p2)->name))
475 static void __init of_unittest_property_copy(void)
477 #ifdef CONFIG_OF_DYNAMIC
478 struct property p1 = { .name = "p1", .length = 0, .value = "" };
479 struct property p2 = { .name = "p2", .length = 5, .value = "abcd" };
480 struct property *new;
482 new = __of_prop_dup(&p1, GFP_KERNEL);
483 unittest(new && propcmp(&p1, new), "empty property didn't copy correctly\n");
488 new = __of_prop_dup(&p2, GFP_KERNEL);
489 unittest(new && propcmp(&p2, new), "non-empty property didn't copy correctly\n");
496 static void __init of_unittest_changeset(void)
498 #ifdef CONFIG_OF_DYNAMIC
499 struct property *ppadd, padd = { .name = "prop-add", .length = 0, .value = "" };
500 struct property *ppupdate, pupdate = { .name = "prop-update", .length = 5, .value = "abcd" };
501 struct property *ppremove;
502 struct device_node *n1, *n2, *n21, *nremove, *parent, *np;
503 struct of_changeset chgset;
505 n1 = __of_node_dup(NULL, "/testcase-data/changeset/n1");
506 unittest(n1, "testcase setup failure\n");
507 n2 = __of_node_dup(NULL, "/testcase-data/changeset/n2");
508 unittest(n2, "testcase setup failure\n");
509 n21 = __of_node_dup(NULL, "%s/%s", "/testcase-data/changeset/n2", "n21");
510 unittest(n21, "testcase setup failure %p\n", n21);
511 nremove = of_find_node_by_path("/testcase-data/changeset/node-remove");
512 unittest(nremove, "testcase setup failure\n");
513 ppadd = __of_prop_dup(&padd, GFP_KERNEL);
514 unittest(ppadd, "testcase setup failure\n");
515 ppupdate = __of_prop_dup(&pupdate, GFP_KERNEL);
516 unittest(ppupdate, "testcase setup failure\n");
517 parent = nremove->parent;
522 ppremove = of_find_property(parent, "prop-remove", NULL);
523 unittest(ppremove, "failed to find removal prop");
525 of_changeset_init(&chgset);
526 unittest(!of_changeset_attach_node(&chgset, n1), "fail attach n1\n");
527 unittest(!of_changeset_attach_node(&chgset, n2), "fail attach n2\n");
528 unittest(!of_changeset_detach_node(&chgset, nremove), "fail remove node\n");
529 unittest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n");
530 unittest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop\n");
531 unittest(!of_changeset_update_property(&chgset, parent, ppupdate), "fail update prop\n");
532 unittest(!of_changeset_remove_property(&chgset, parent, ppremove), "fail remove prop\n");
533 mutex_lock(&of_mutex);
534 unittest(!of_changeset_apply(&chgset), "apply failed\n");
535 mutex_unlock(&of_mutex);
537 /* Make sure node names are constructed correctly */
538 unittest((np = of_find_node_by_path("/testcase-data/changeset/n2/n21")),
539 "'%s' not added\n", n21->full_name);
542 mutex_lock(&of_mutex);
543 unittest(!of_changeset_revert(&chgset), "revert failed\n");
544 mutex_unlock(&of_mutex);
546 of_changeset_destroy(&chgset);
550 static void __init of_unittest_parse_interrupts(void)
552 struct device_node *np;
553 struct of_phandle_args args;
556 np = of_find_node_by_path("/testcase-data/interrupts/interrupts0");
558 pr_err("missing testcase data\n");
562 for (i = 0; i < 4; i++) {
566 rc = of_irq_parse_one(np, i, &args);
569 passed &= (args.args_count == 1);
570 passed &= (args.args[0] == (i + 1));
572 unittest(passed, "index %i - data error on node %s rc=%i\n",
573 i, args.np->full_name, rc);
577 np = of_find_node_by_path("/testcase-data/interrupts/interrupts1");
579 pr_err("missing testcase data\n");
583 for (i = 0; i < 4; i++) {
587 rc = of_irq_parse_one(np, i, &args);
589 /* Test the values from tests-phandle.dtsi */
593 passed &= (args.args_count == 1);
594 passed &= (args.args[0] == 9);
598 passed &= (args.args_count == 3);
599 passed &= (args.args[0] == 10);
600 passed &= (args.args[1] == 11);
601 passed &= (args.args[2] == 12);
605 passed &= (args.args_count == 2);
606 passed &= (args.args[0] == 13);
607 passed &= (args.args[1] == 14);
611 passed &= (args.args_count == 2);
612 passed &= (args.args[0] == 15);
613 passed &= (args.args[1] == 16);
618 unittest(passed, "index %i - data error on node %s rc=%i\n",
619 i, args.np->full_name, rc);
624 static void __init of_unittest_parse_interrupts_extended(void)
626 struct device_node *np;
627 struct of_phandle_args args;
630 np = of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0");
632 pr_err("missing testcase data\n");
636 for (i = 0; i < 7; i++) {
639 rc = of_irq_parse_one(np, i, &args);
641 /* Test the values from tests-phandle.dtsi */
645 passed &= (args.args_count == 1);
646 passed &= (args.args[0] == 1);
650 passed &= (args.args_count == 3);
651 passed &= (args.args[0] == 2);
652 passed &= (args.args[1] == 3);
653 passed &= (args.args[2] == 4);
657 passed &= (args.args_count == 2);
658 passed &= (args.args[0] == 5);
659 passed &= (args.args[1] == 6);
663 passed &= (args.args_count == 1);
664 passed &= (args.args[0] == 9);
668 passed &= (args.args_count == 3);
669 passed &= (args.args[0] == 10);
670 passed &= (args.args[1] == 11);
671 passed &= (args.args[2] == 12);
675 passed &= (args.args_count == 2);
676 passed &= (args.args[0] == 13);
677 passed &= (args.args[1] == 14);
681 passed &= (args.args_count == 1);
682 passed &= (args.args[0] == 15);
688 unittest(passed, "index %i - data error on node %s rc=%i\n",
689 i, args.np->full_name, rc);
694 static const struct of_device_id match_node_table[] = {
695 { .data = "A", .name = "name0", }, /* Name alone is lowest priority */
696 { .data = "B", .type = "type1", }, /* followed by type alone */
698 { .data = "Ca", .name = "name2", .type = "type1", }, /* followed by both together */
699 { .data = "Cb", .name = "name2", }, /* Only match when type doesn't match */
700 { .data = "Cc", .name = "name2", .type = "type2", },
702 { .data = "E", .compatible = "compat3" },
703 { .data = "G", .compatible = "compat2", },
704 { .data = "H", .compatible = "compat2", .name = "name5", },
705 { .data = "I", .compatible = "compat2", .type = "type1", },
706 { .data = "J", .compatible = "compat2", .type = "type1", .name = "name8", },
707 { .data = "K", .compatible = "compat2", .name = "name9", },
714 } match_node_tests[] = {
715 { .path = "/testcase-data/match-node/name0", .data = "A", },
716 { .path = "/testcase-data/match-node/name1", .data = "B", },
717 { .path = "/testcase-data/match-node/a/name2", .data = "Ca", },
718 { .path = "/testcase-data/match-node/b/name2", .data = "Cb", },
719 { .path = "/testcase-data/match-node/c/name2", .data = "Cc", },
720 { .path = "/testcase-data/match-node/name3", .data = "E", },
721 { .path = "/testcase-data/match-node/name4", .data = "G", },
722 { .path = "/testcase-data/match-node/name5", .data = "H", },
723 { .path = "/testcase-data/match-node/name6", .data = "G", },
724 { .path = "/testcase-data/match-node/name7", .data = "I", },
725 { .path = "/testcase-data/match-node/name8", .data = "J", },
726 { .path = "/testcase-data/match-node/name9", .data = "K", },
729 static void __init of_unittest_match_node(void)
731 struct device_node *np;
732 const struct of_device_id *match;
735 for (i = 0; i < ARRAY_SIZE(match_node_tests); i++) {
736 np = of_find_node_by_path(match_node_tests[i].path);
738 unittest(0, "missing testcase node %s\n",
739 match_node_tests[i].path);
743 match = of_match_node(match_node_table, np);
745 unittest(0, "%s didn't match anything\n",
746 match_node_tests[i].path);
750 if (strcmp(match->data, match_node_tests[i].data) != 0) {
751 unittest(0, "%s got wrong match. expected %s, got %s\n",
752 match_node_tests[i].path, match_node_tests[i].data,
753 (const char *)match->data);
756 unittest(1, "passed");
760 static struct resource test_bus_res = {
763 .flags = IORESOURCE_MEM,
765 static const struct platform_device_info test_bus_info = {
766 .name = "unittest-bus",
768 static void __init of_unittest_platform_populate(void)
771 struct device_node *np, *child, *grandchild;
772 struct platform_device *pdev, *test_bus;
773 const struct of_device_id match[] = {
774 { .compatible = "test-device", },
778 np = of_find_node_by_path("/testcase-data");
779 of_platform_populate(np, of_default_bus_match_table, NULL, NULL);
781 /* Test that a missing irq domain returns -EPROBE_DEFER */
782 np = of_find_node_by_path("/testcase-data/testcase-device1");
783 pdev = of_find_device_by_node(np);
784 unittest(pdev, "device 1 creation failed\n");
786 irq = platform_get_irq(pdev, 0);
787 unittest(irq == -EPROBE_DEFER, "device deferred probe failed - %d\n", irq);
789 /* Test that a parsing failure does not return -EPROBE_DEFER */
790 np = of_find_node_by_path("/testcase-data/testcase-device2");
791 pdev = of_find_device_by_node(np);
792 unittest(pdev, "device 2 creation failed\n");
793 irq = platform_get_irq(pdev, 0);
794 unittest(irq < 0 && irq != -EPROBE_DEFER, "device parsing error failed - %d\n", irq);
796 np = of_find_node_by_path("/testcase-data/platform-tests");
797 unittest(np, "No testcase data in device tree\n");
801 test_bus = platform_device_register_full(&test_bus_info);
802 rc = PTR_ERR_OR_ZERO(test_bus);
803 unittest(!rc, "testbus registration failed; rc=%i\n", rc);
806 test_bus->dev.of_node = np;
809 * Add a dummy resource to the test bus node after it is
810 * registered to catch problems with un-inserted resources. The
811 * DT code doesn't insert the resources, and it has caused the
812 * kernel to oops in the past. This makes sure the same bug
813 * doesn't crop up again.
815 platform_device_add_resources(test_bus, &test_bus_res, 1);
817 of_platform_populate(np, match, NULL, &test_bus->dev);
818 for_each_child_of_node(np, child) {
819 for_each_child_of_node(child, grandchild)
820 unittest(of_find_device_by_node(grandchild),
821 "Could not create device for node '%s'\n",
825 of_platform_depopulate(&test_bus->dev);
826 for_each_child_of_node(np, child) {
827 for_each_child_of_node(child, grandchild)
828 unittest(!of_find_device_by_node(grandchild),
829 "device didn't get destroyed '%s'\n",
833 platform_device_unregister(test_bus);
838 * update_node_properties - adds the properties
839 * of np into dup node (present in live tree) and
840 * updates parent of children of np to dup.
842 * @np: node already present in live tree
843 * @dup: node present in live tree to be updated
845 static void update_node_properties(struct device_node *np,
846 struct device_node *dup)
848 struct property *prop;
849 struct device_node *child;
851 for_each_property_of_node(np, prop)
852 of_add_property(dup, prop);
854 for_each_child_of_node(np, child)
859 * attach_node_and_children - attaches nodes
860 * and its children to live tree
862 * @np: Node to attach to live tree
864 static int attach_node_and_children(struct device_node *np)
866 struct device_node *next, *dup, *child;
869 dup = of_find_node_by_path(np->full_name);
871 update_node_properties(np, dup);
878 mutex_lock(&of_mutex);
879 raw_spin_lock_irqsave(&devtree_lock, flags);
880 np->sibling = np->parent->child;
881 np->parent->child = np;
882 of_node_clear_flag(np, OF_DETACHED);
883 raw_spin_unlock_irqrestore(&devtree_lock, flags);
885 __of_attach_node_sysfs(np);
886 mutex_unlock(&of_mutex);
889 next = child->sibling;
890 attach_node_and_children(child);
898 * unittest_data_add - Reads, copies data from
899 * linked tree and attaches it to the live tree
901 static int __init unittest_data_add(void)
904 struct device_node *unittest_data_node, *np;
906 * __dtb_testcases_begin[] and __dtb_testcases_end[] are magically
907 * created by cmd_dt_S_dtb in scripts/Makefile.lib
909 extern uint8_t __dtb_testcases_begin[];
910 extern uint8_t __dtb_testcases_end[];
911 const int size = __dtb_testcases_end - __dtb_testcases_begin;
915 pr_warn("%s: No testcase data to attach; not running tests\n",
921 unittest_data = kmemdup(__dtb_testcases_begin, size, GFP_KERNEL);
923 if (!unittest_data) {
924 pr_warn("%s: Failed to allocate memory for unittest_data; "
925 "not running tests\n", __func__);
928 of_fdt_unflatten_tree(unittest_data, &unittest_data_node);
929 if (!unittest_data_node) {
930 pr_warn("%s: No tree to attach; not running tests\n", __func__);
933 of_node_set_flag(unittest_data_node, OF_DETACHED);
934 rc = of_resolve_phandles(unittest_data_node);
936 pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__, rc);
941 of_root = unittest_data_node;
942 for_each_of_allnodes(np)
943 __of_attach_node_sysfs(np);
944 of_aliases = of_find_node_by_path("/aliases");
945 of_chosen = of_find_node_by_path("/chosen");
949 /* attach the sub-tree to live tree */
950 np = unittest_data_node->child;
952 struct device_node *next = np->sibling;
954 np->parent = of_root;
955 attach_node_and_children(np);
961 #ifdef CONFIG_OF_OVERLAY
963 static int unittest_probe(struct platform_device *pdev)
965 struct device *dev = &pdev->dev;
966 struct device_node *np = dev->of_node;
969 dev_err(dev, "No OF data for device\n");
974 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
976 of_platform_populate(np, NULL, NULL, &pdev->dev);
981 static int unittest_remove(struct platform_device *pdev)
983 struct device *dev = &pdev->dev;
984 struct device_node *np = dev->of_node;
986 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
990 static const struct of_device_id unittest_match[] = {
991 { .compatible = "unittest", },
995 static struct platform_driver unittest_driver = {
996 .probe = unittest_probe,
997 .remove = unittest_remove,
1000 .of_match_table = of_match_ptr(unittest_match),
1004 /* get the platform device instantiated at the path */
1005 static struct platform_device *of_path_to_platform_device(const char *path)
1007 struct device_node *np;
1008 struct platform_device *pdev;
1010 np = of_find_node_by_path(path);
1014 pdev = of_find_device_by_node(np);
1020 /* find out if a platform device exists at that path */
1021 static int of_path_platform_device_exists(const char *path)
1023 struct platform_device *pdev;
1025 pdev = of_path_to_platform_device(path);
1026 platform_device_put(pdev);
1027 return pdev != NULL;
1030 #if IS_BUILTIN(CONFIG_I2C)
1032 /* get the i2c client device instantiated at the path */
1033 static struct i2c_client *of_path_to_i2c_client(const char *path)
1035 struct device_node *np;
1036 struct i2c_client *client;
1038 np = of_find_node_by_path(path);
1042 client = of_find_i2c_device_by_node(np);
1048 /* find out if a i2c client device exists at that path */
1049 static int of_path_i2c_client_exists(const char *path)
1051 struct i2c_client *client;
1053 client = of_path_to_i2c_client(path);
1055 put_device(&client->dev);
1056 return client != NULL;
1059 static int of_path_i2c_client_exists(const char *path)
1070 static int of_path_device_type_exists(const char *path,
1071 enum overlay_type ovtype)
1075 return of_path_platform_device_exists(path);
1077 return of_path_i2c_client_exists(path);
1082 static const char *unittest_path(int nr, enum overlay_type ovtype)
1085 static char buf[256];
1089 base = "/testcase-data/overlay-node/test-bus";
1092 base = "/testcase-data/overlay-node/test-bus/i2c-test-bus";
1098 snprintf(buf, sizeof(buf) - 1, "%s/test-unittest%d", base, nr);
1099 buf[sizeof(buf) - 1] = '\0';
1103 static int of_unittest_device_exists(int unittest_nr, enum overlay_type ovtype)
1107 path = unittest_path(unittest_nr, ovtype);
1111 return of_path_platform_device_exists(path);
1113 return of_path_i2c_client_exists(path);
1118 static const char *overlay_path(int nr)
1120 static char buf[256];
1122 snprintf(buf, sizeof(buf) - 1,
1123 "/testcase-data/overlay%d", nr);
1124 buf[sizeof(buf) - 1] = '\0';
1129 static const char *bus_path = "/testcase-data/overlay-node/test-bus";
1131 /* it is guaranteed that overlay ids are assigned in sequence */
1132 #define MAX_UNITTEST_OVERLAYS 256
1133 static unsigned long overlay_id_bits[BITS_TO_LONGS(MAX_UNITTEST_OVERLAYS)];
1134 static int overlay_first_id = -1;
1136 static void of_unittest_track_overlay(int id)
1138 if (overlay_first_id < 0)
1139 overlay_first_id = id;
1140 id -= overlay_first_id;
1142 /* we shouldn't need that many */
1143 BUG_ON(id >= MAX_UNITTEST_OVERLAYS);
1144 overlay_id_bits[BIT_WORD(id)] |= BIT_MASK(id);
1147 static void of_unittest_untrack_overlay(int id)
1149 if (overlay_first_id < 0)
1151 id -= overlay_first_id;
1152 BUG_ON(id >= MAX_UNITTEST_OVERLAYS);
1153 overlay_id_bits[BIT_WORD(id)] &= ~BIT_MASK(id);
1156 static void of_unittest_destroy_tracked_overlays(void)
1158 int id, ret, defers;
1160 if (overlay_first_id < 0)
1163 /* try until no defers */
1166 /* remove in reverse order */
1167 for (id = MAX_UNITTEST_OVERLAYS - 1; id >= 0; id--) {
1168 if (!(overlay_id_bits[BIT_WORD(id)] & BIT_MASK(id)))
1171 ret = of_overlay_destroy(id + overlay_first_id);
1174 pr_warn("%s: overlay destroy failed for #%d\n",
1175 __func__, id + overlay_first_id);
1179 overlay_id_bits[BIT_WORD(id)] &= ~BIT_MASK(id);
1181 } while (defers > 0);
1184 static int of_unittest_apply_overlay(int unittest_nr, int overlay_nr,
1187 struct device_node *np = NULL;
1190 np = of_find_node_by_path(overlay_path(overlay_nr));
1192 unittest(0, "could not find overlay node @\"%s\"\n",
1193 overlay_path(overlay_nr));
1198 ret = of_overlay_create(np);
1200 unittest(0, "could not create overlay from \"%s\"\n",
1201 overlay_path(overlay_nr));
1205 of_unittest_track_overlay(id);
1218 /* apply an overlay while checking before and after states */
1219 static int of_unittest_apply_overlay_check(int overlay_nr, int unittest_nr,
1220 int before, int after, enum overlay_type ovtype)
1224 /* unittest device must not be in before state */
1225 if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
1226 unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1227 overlay_path(overlay_nr),
1228 unittest_path(unittest_nr, ovtype),
1229 !before ? "enabled" : "disabled");
1233 ret = of_unittest_apply_overlay(overlay_nr, unittest_nr, NULL);
1235 /* of_unittest_apply_overlay already called unittest() */
1239 /* unittest device must be to set to after state */
1240 if (of_unittest_device_exists(unittest_nr, ovtype) != after) {
1241 unittest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n",
1242 overlay_path(overlay_nr),
1243 unittest_path(unittest_nr, ovtype),
1244 !after ? "enabled" : "disabled");
1251 /* apply an overlay and then revert it while checking before, after states */
1252 static int of_unittest_apply_revert_overlay_check(int overlay_nr,
1253 int unittest_nr, int before, int after,
1254 enum overlay_type ovtype)
1258 /* unittest device must be in before state */
1259 if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
1260 unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1261 overlay_path(overlay_nr),
1262 unittest_path(unittest_nr, ovtype),
1263 !before ? "enabled" : "disabled");
1267 /* apply the overlay */
1268 ret = of_unittest_apply_overlay(overlay_nr, unittest_nr, &ov_id);
1270 /* of_unittest_apply_overlay already called unittest() */
1274 /* unittest device must be in after state */
1275 if (of_unittest_device_exists(unittest_nr, ovtype) != after) {
1276 unittest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n",
1277 overlay_path(overlay_nr),
1278 unittest_path(unittest_nr, ovtype),
1279 !after ? "enabled" : "disabled");
1283 ret = of_overlay_destroy(ov_id);
1285 unittest(0, "overlay @\"%s\" failed to be destroyed @\"%s\"\n",
1286 overlay_path(overlay_nr),
1287 unittest_path(unittest_nr, ovtype));
1291 /* unittest device must be again in before state */
1292 if (of_unittest_device_exists(unittest_nr, PDEV_OVERLAY) != before) {
1293 unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1294 overlay_path(overlay_nr),
1295 unittest_path(unittest_nr, ovtype),
1296 !before ? "enabled" : "disabled");
1303 /* test activation of device */
1304 static void of_unittest_overlay_0(void)
1308 /* device should enable */
1309 ret = of_unittest_apply_overlay_check(0, 0, 0, 1, PDEV_OVERLAY);
1313 unittest(1, "overlay test %d passed\n", 0);
1316 /* test deactivation of device */
1317 static void of_unittest_overlay_1(void)
1321 /* device should disable */
1322 ret = of_unittest_apply_overlay_check(1, 1, 1, 0, PDEV_OVERLAY);
1326 unittest(1, "overlay test %d passed\n", 1);
1329 /* test activation of device */
1330 static void of_unittest_overlay_2(void)
1334 /* device should enable */
1335 ret = of_unittest_apply_overlay_check(2, 2, 0, 1, PDEV_OVERLAY);
1339 unittest(1, "overlay test %d passed\n", 2);
1342 /* test deactivation of device */
1343 static void of_unittest_overlay_3(void)
1347 /* device should disable */
1348 ret = of_unittest_apply_overlay_check(3, 3, 1, 0, PDEV_OVERLAY);
1352 unittest(1, "overlay test %d passed\n", 3);
1355 /* test activation of a full device node */
1356 static void of_unittest_overlay_4(void)
1360 /* device should disable */
1361 ret = of_unittest_apply_overlay_check(4, 4, 0, 1, PDEV_OVERLAY);
1365 unittest(1, "overlay test %d passed\n", 4);
1368 /* test overlay apply/revert sequence */
1369 static void of_unittest_overlay_5(void)
1373 /* device should disable */
1374 ret = of_unittest_apply_revert_overlay_check(5, 5, 0, 1, PDEV_OVERLAY);
1378 unittest(1, "overlay test %d passed\n", 5);
1381 /* test overlay application in sequence */
1382 static void of_unittest_overlay_6(void)
1384 struct device_node *np;
1385 int ret, i, ov_id[2];
1386 int overlay_nr = 6, unittest_nr = 6;
1387 int before = 0, after = 1;
1389 /* unittest device must be in before state */
1390 for (i = 0; i < 2; i++) {
1391 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
1393 unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1394 overlay_path(overlay_nr + i),
1395 unittest_path(unittest_nr + i,
1397 !before ? "enabled" : "disabled");
1402 /* apply the overlays */
1403 for (i = 0; i < 2; i++) {
1405 np = of_find_node_by_path(overlay_path(overlay_nr + i));
1407 unittest(0, "could not find overlay node @\"%s\"\n",
1408 overlay_path(overlay_nr + i));
1412 ret = of_overlay_create(np);
1414 unittest(0, "could not create overlay from \"%s\"\n",
1415 overlay_path(overlay_nr + i));
1419 of_unittest_track_overlay(ov_id[i]);
1422 for (i = 0; i < 2; i++) {
1423 /* unittest device must be in after state */
1424 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
1426 unittest(0, "overlay @\"%s\" failed @\"%s\" %s\n",
1427 overlay_path(overlay_nr + i),
1428 unittest_path(unittest_nr + i,
1430 !after ? "enabled" : "disabled");
1435 for (i = 1; i >= 0; i--) {
1436 ret = of_overlay_destroy(ov_id[i]);
1438 unittest(0, "overlay @\"%s\" failed destroy @\"%s\"\n",
1439 overlay_path(overlay_nr + i),
1440 unittest_path(unittest_nr + i,
1444 of_unittest_untrack_overlay(ov_id[i]);
1447 for (i = 0; i < 2; i++) {
1448 /* unittest device must be again in before state */
1449 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
1451 unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1452 overlay_path(overlay_nr + i),
1453 unittest_path(unittest_nr + i,
1455 !before ? "enabled" : "disabled");
1460 unittest(1, "overlay test %d passed\n", 6);
1463 /* test overlay application in sequence */
1464 static void of_unittest_overlay_8(void)
1466 struct device_node *np;
1467 int ret, i, ov_id[2];
1468 int overlay_nr = 8, unittest_nr = 8;
1470 /* we don't care about device state in this test */
1472 /* apply the overlays */
1473 for (i = 0; i < 2; i++) {
1475 np = of_find_node_by_path(overlay_path(overlay_nr + i));
1477 unittest(0, "could not find overlay node @\"%s\"\n",
1478 overlay_path(overlay_nr + i));
1482 ret = of_overlay_create(np);
1484 unittest(0, "could not create overlay from \"%s\"\n",
1485 overlay_path(overlay_nr + i));
1489 of_unittest_track_overlay(ov_id[i]);
1492 /* now try to remove first overlay (it should fail) */
1493 ret = of_overlay_destroy(ov_id[0]);
1495 unittest(0, "overlay @\"%s\" was destroyed @\"%s\"\n",
1496 overlay_path(overlay_nr + 0),
1497 unittest_path(unittest_nr,
1502 /* removing them in order should work */
1503 for (i = 1; i >= 0; i--) {
1504 ret = of_overlay_destroy(ov_id[i]);
1506 unittest(0, "overlay @\"%s\" not destroyed @\"%s\"\n",
1507 overlay_path(overlay_nr + i),
1508 unittest_path(unittest_nr,
1512 of_unittest_untrack_overlay(ov_id[i]);
1515 unittest(1, "overlay test %d passed\n", 8);
1518 /* test insertion of a bus with parent devices */
1519 static void of_unittest_overlay_10(void)
1524 /* device should disable */
1525 ret = of_unittest_apply_overlay_check(10, 10, 0, 1, PDEV_OVERLAY);
1526 if (unittest(ret == 0,
1527 "overlay test %d failed; overlay application\n", 10))
1530 child_path = kasprintf(GFP_KERNEL, "%s/test-unittest101",
1531 unittest_path(10, PDEV_OVERLAY));
1532 if (unittest(child_path, "overlay test %d failed; kasprintf\n", 10))
1535 ret = of_path_device_type_exists(child_path, PDEV_OVERLAY);
1537 if (unittest(ret, "overlay test %d failed; no child device\n", 10))
1541 /* test insertion of a bus with parent devices (and revert) */
1542 static void of_unittest_overlay_11(void)
1546 /* device should disable */
1547 ret = of_unittest_apply_revert_overlay_check(11, 11, 0, 1,
1549 if (unittest(ret == 0,
1550 "overlay test %d failed; overlay application\n", 11))
1554 #if IS_BUILTIN(CONFIG_I2C) && IS_ENABLED(CONFIG_OF_OVERLAY)
1556 struct unittest_i2c_bus_data {
1557 struct platform_device *pdev;
1558 struct i2c_adapter adap;
1561 static int unittest_i2c_master_xfer(struct i2c_adapter *adap,
1562 struct i2c_msg *msgs, int num)
1564 struct unittest_i2c_bus_data *std = i2c_get_adapdata(adap);
1571 static u32 unittest_i2c_functionality(struct i2c_adapter *adap)
1573 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
1576 static const struct i2c_algorithm unittest_i2c_algo = {
1577 .master_xfer = unittest_i2c_master_xfer,
1578 .functionality = unittest_i2c_functionality,
1581 static int unittest_i2c_bus_probe(struct platform_device *pdev)
1583 struct device *dev = &pdev->dev;
1584 struct device_node *np = dev->of_node;
1585 struct unittest_i2c_bus_data *std;
1586 struct i2c_adapter *adap;
1590 dev_err(dev, "No OF data for device\n");
1595 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1597 std = devm_kzalloc(dev, sizeof(*std), GFP_KERNEL);
1599 dev_err(dev, "Failed to allocate unittest i2c data\n");
1603 /* link them together */
1605 platform_set_drvdata(pdev, std);
1608 i2c_set_adapdata(adap, std);
1610 strlcpy(adap->name, pdev->name, sizeof(adap->name));
1611 adap->class = I2C_CLASS_DEPRECATED;
1612 adap->algo = &unittest_i2c_algo;
1613 adap->dev.parent = dev;
1614 adap->dev.of_node = dev->of_node;
1615 adap->timeout = 5 * HZ;
1618 ret = i2c_add_numbered_adapter(adap);
1620 dev_err(dev, "Failed to add I2C adapter\n");
1627 static int unittest_i2c_bus_remove(struct platform_device *pdev)
1629 struct device *dev = &pdev->dev;
1630 struct device_node *np = dev->of_node;
1631 struct unittest_i2c_bus_data *std = platform_get_drvdata(pdev);
1633 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1634 i2c_del_adapter(&std->adap);
1639 static const struct of_device_id unittest_i2c_bus_match[] = {
1640 { .compatible = "unittest-i2c-bus", },
1644 static struct platform_driver unittest_i2c_bus_driver = {
1645 .probe = unittest_i2c_bus_probe,
1646 .remove = unittest_i2c_bus_remove,
1648 .name = "unittest-i2c-bus",
1649 .of_match_table = of_match_ptr(unittest_i2c_bus_match),
1653 static int unittest_i2c_dev_probe(struct i2c_client *client,
1654 const struct i2c_device_id *id)
1656 struct device *dev = &client->dev;
1657 struct device_node *np = client->dev.of_node;
1660 dev_err(dev, "No OF node\n");
1664 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1669 static int unittest_i2c_dev_remove(struct i2c_client *client)
1671 struct device *dev = &client->dev;
1672 struct device_node *np = client->dev.of_node;
1674 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1678 static const struct i2c_device_id unittest_i2c_dev_id[] = {
1679 { .name = "unittest-i2c-dev" },
1683 static struct i2c_driver unittest_i2c_dev_driver = {
1685 .name = "unittest-i2c-dev",
1687 .probe = unittest_i2c_dev_probe,
1688 .remove = unittest_i2c_dev_remove,
1689 .id_table = unittest_i2c_dev_id,
1692 #if IS_BUILTIN(CONFIG_I2C_MUX)
1694 struct unittest_i2c_mux_data {
1696 struct i2c_adapter *adap[];
1699 static int unittest_i2c_mux_select_chan(struct i2c_adapter *adap,
1700 void *client, u32 chan)
1705 static int unittest_i2c_mux_probe(struct i2c_client *client,
1706 const struct i2c_device_id *id)
1708 int ret, i, nchans, size;
1709 struct device *dev = &client->dev;
1710 struct i2c_adapter *adap = to_i2c_adapter(dev->parent);
1711 struct device_node *np = client->dev.of_node, *child;
1712 struct unittest_i2c_mux_data *stm;
1715 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1718 dev_err(dev, "No OF node\n");
1723 for_each_child_of_node(np, child) {
1724 ret = of_property_read_u32(child, "reg", ®);
1727 if (max_reg == (u32)-1 || reg > max_reg)
1730 nchans = max_reg == (u32)-1 ? 0 : max_reg + 1;
1732 dev_err(dev, "No channels\n");
1736 size = offsetof(struct unittest_i2c_mux_data, adap[nchans]);
1737 stm = devm_kzalloc(dev, size, GFP_KERNEL);
1739 dev_err(dev, "Out of memory\n");
1742 stm->nchans = nchans;
1743 for (i = 0; i < nchans; i++) {
1744 stm->adap[i] = i2c_add_mux_adapter(adap, dev, client,
1745 0, i, 0, unittest_i2c_mux_select_chan, NULL);
1746 if (!stm->adap[i]) {
1747 dev_err(dev, "Failed to register mux #%d\n", i);
1748 for (i--; i >= 0; i--)
1749 i2c_del_mux_adapter(stm->adap[i]);
1754 i2c_set_clientdata(client, stm);
1759 static int unittest_i2c_mux_remove(struct i2c_client *client)
1761 struct device *dev = &client->dev;
1762 struct device_node *np = client->dev.of_node;
1763 struct unittest_i2c_mux_data *stm = i2c_get_clientdata(client);
1766 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1767 for (i = stm->nchans - 1; i >= 0; i--)
1768 i2c_del_mux_adapter(stm->adap[i]);
1772 static const struct i2c_device_id unittest_i2c_mux_id[] = {
1773 { .name = "unittest-i2c-mux" },
1777 static struct i2c_driver unittest_i2c_mux_driver = {
1779 .name = "unittest-i2c-mux",
1781 .probe = unittest_i2c_mux_probe,
1782 .remove = unittest_i2c_mux_remove,
1783 .id_table = unittest_i2c_mux_id,
1788 static int of_unittest_overlay_i2c_init(void)
1792 ret = i2c_add_driver(&unittest_i2c_dev_driver);
1793 if (unittest(ret == 0,
1794 "could not register unittest i2c device driver\n"))
1797 ret = platform_driver_register(&unittest_i2c_bus_driver);
1798 if (unittest(ret == 0,
1799 "could not register unittest i2c bus driver\n"))
1802 #if IS_BUILTIN(CONFIG_I2C_MUX)
1803 ret = i2c_add_driver(&unittest_i2c_mux_driver);
1804 if (unittest(ret == 0,
1805 "could not register unittest i2c mux driver\n"))
1812 static void of_unittest_overlay_i2c_cleanup(void)
1814 #if IS_BUILTIN(CONFIG_I2C_MUX)
1815 i2c_del_driver(&unittest_i2c_mux_driver);
1817 platform_driver_unregister(&unittest_i2c_bus_driver);
1818 i2c_del_driver(&unittest_i2c_dev_driver);
1821 static void of_unittest_overlay_i2c_12(void)
1825 /* device should enable */
1826 ret = of_unittest_apply_overlay_check(12, 12, 0, 1, I2C_OVERLAY);
1830 unittest(1, "overlay test %d passed\n", 12);
1833 /* test deactivation of device */
1834 static void of_unittest_overlay_i2c_13(void)
1838 /* device should disable */
1839 ret = of_unittest_apply_overlay_check(13, 13, 1, 0, I2C_OVERLAY);
1843 unittest(1, "overlay test %d passed\n", 13);
1846 /* just check for i2c mux existence */
1847 static void of_unittest_overlay_i2c_14(void)
1851 static void of_unittest_overlay_i2c_15(void)
1855 /* device should enable */
1856 ret = of_unittest_apply_overlay_check(16, 15, 0, 1, I2C_OVERLAY);
1860 unittest(1, "overlay test %d passed\n", 15);
1865 static inline void of_unittest_overlay_i2c_14(void) { }
1866 static inline void of_unittest_overlay_i2c_15(void) { }
1870 static void __init of_unittest_overlay(void)
1872 struct device_node *bus_np = NULL;
1875 ret = platform_driver_register(&unittest_driver);
1877 unittest(0, "could not register unittest driver\n");
1881 bus_np = of_find_node_by_path(bus_path);
1882 if (bus_np == NULL) {
1883 unittest(0, "could not find bus_path \"%s\"\n", bus_path);
1887 ret = of_platform_populate(bus_np, of_default_bus_match_table,
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);