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 "of_private.h"
28 static struct selftest_results {
33 #define selftest(result, fmt, ...) ({ \
34 bool failed = !(result); \
36 selftest_results.failed++; \
37 pr_err("FAIL %s():%i " fmt, __func__, __LINE__, ##__VA_ARGS__); \
39 selftest_results.passed++; \
40 pr_debug("pass %s():%i\n", __func__, __LINE__); \
45 static void __init of_selftest_find_node_by_name(void)
47 struct device_node *np;
50 np = of_find_node_by_path("/testcase-data");
51 selftest(np && !strcmp("/testcase-data", np->full_name),
52 "find /testcase-data failed\n");
55 /* Test if trailing '/' works */
56 np = of_find_node_by_path("/testcase-data/");
57 selftest(!np, "trailing '/' on /testcase-data/ should fail\n");
59 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
60 selftest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", np->full_name),
61 "find /testcase-data/phandle-tests/consumer-a failed\n");
64 np = of_find_node_by_path("testcase-alias");
65 selftest(np && !strcmp("/testcase-data", np->full_name),
66 "find testcase-alias failed\n");
69 /* Test if trailing '/' works on aliases */
70 np = of_find_node_by_path("testcase-alias/");
71 selftest(!np, "trailing '/' on testcase-alias/ should fail\n");
73 np = of_find_node_by_path("testcase-alias/phandle-tests/consumer-a");
74 selftest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", np->full_name),
75 "find testcase-alias/phandle-tests/consumer-a failed\n");
78 np = of_find_node_by_path("/testcase-data/missing-path");
79 selftest(!np, "non-existent path returned node %s\n", np->full_name);
82 np = of_find_node_by_path("missing-alias");
83 selftest(!np, "non-existent alias returned node %s\n", np->full_name);
86 np = of_find_node_by_path("testcase-alias/missing-path");
87 selftest(!np, "non-existent alias with relative path returned node %s\n", np->full_name);
90 np = of_find_node_opts_by_path("/testcase-data:testoption", &options);
91 selftest(np && !strcmp("testoption", options),
92 "option path test failed\n");
95 np = of_find_node_opts_by_path("/testcase-data:test/option", &options);
96 selftest(np && !strcmp("test/option", options),
97 "option path test, subcase #1 failed\n");
100 np = of_find_node_opts_by_path("/testcase-data:testoption", NULL);
101 selftest(np, "NULL option path test failed\n");
104 np = of_find_node_opts_by_path("testcase-alias:testaliasoption",
106 selftest(np && !strcmp("testaliasoption", options),
107 "option alias path test failed\n");
110 np = of_find_node_opts_by_path("testcase-alias:test/alias/option",
112 selftest(np && !strcmp("test/alias/option", options),
113 "option alias path test, subcase #1 failed\n");
116 np = of_find_node_opts_by_path("testcase-alias:testaliasoption", NULL);
117 selftest(np, "NULL option alias path test failed\n");
120 options = "testoption";
121 np = of_find_node_opts_by_path("testcase-alias", &options);
122 selftest(np && !options, "option clearing test failed\n");
125 options = "testoption";
126 np = of_find_node_opts_by_path("/", &options);
127 selftest(np && !options, "option clearing root node test failed\n");
131 static void __init of_selftest_dynamic(void)
133 struct device_node *np;
134 struct property *prop;
136 np = of_find_node_by_path("/testcase-data");
138 pr_err("missing testcase data\n");
142 /* Array of 4 properties for the purpose of testing */
143 prop = kzalloc(sizeof(*prop) * 4, GFP_KERNEL);
145 selftest(0, "kzalloc() failed\n");
149 /* Add a new property - should pass*/
150 prop->name = "new-property";
151 prop->value = "new-property-data";
152 prop->length = strlen(prop->value);
153 selftest(of_add_property(np, prop) == 0, "Adding a new property failed\n");
155 /* Try to add an existing property - should fail */
157 prop->name = "new-property";
158 prop->value = "new-property-data-should-fail";
159 prop->length = strlen(prop->value);
160 selftest(of_add_property(np, prop) != 0,
161 "Adding an existing property should have failed\n");
163 /* Try to modify an existing property - should pass */
164 prop->value = "modify-property-data-should-pass";
165 prop->length = strlen(prop->value);
166 selftest(of_update_property(np, prop) == 0,
167 "Updating an existing property should have passed\n");
169 /* Try to modify non-existent property - should pass*/
171 prop->name = "modify-property";
172 prop->value = "modify-missing-property-data-should-pass";
173 prop->length = strlen(prop->value);
174 selftest(of_update_property(np, prop) == 0,
175 "Updating a missing property should have passed\n");
177 /* Remove property - should pass */
178 selftest(of_remove_property(np, prop) == 0,
179 "Removing a property should have passed\n");
181 /* Adding very large property - should pass */
183 prop->name = "large-property-PAGE_SIZEx8";
184 prop->length = PAGE_SIZE * 8;
185 prop->value = kzalloc(prop->length, GFP_KERNEL);
186 selftest(prop->value != NULL, "Unable to allocate large buffer\n");
188 selftest(of_add_property(np, prop) == 0,
189 "Adding a large property should have passed\n");
192 static int __init of_selftest_check_node_linkage(struct device_node *np)
194 struct device_node *child;
197 for_each_child_of_node(np, child) {
198 if (child->parent != np) {
199 pr_err("Child node %s links to wrong parent %s\n",
200 child->name, np->name);
204 rc = of_selftest_check_node_linkage(child);
213 static void __init of_selftest_check_tree_linkage(void)
215 struct device_node *np;
216 int allnode_count = 0, child_count;
221 for_each_of_allnodes(np)
223 child_count = of_selftest_check_node_linkage(of_root);
225 selftest(child_count > 0, "Device node data structure is corrupted\n");
226 selftest(child_count == allnode_count, "allnodes list size (%i) doesn't match"
227 "sibling lists size (%i)\n", allnode_count, child_count);
228 pr_debug("allnodes list size (%i); sibling lists size (%i)\n", allnode_count, child_count);
232 struct hlist_node node;
233 struct device_node *np;
236 static DEFINE_HASHTABLE(phandle_ht, 8);
237 static void __init of_selftest_check_phandles(void)
239 struct device_node *np;
240 struct node_hash *nh;
241 struct hlist_node *tmp;
242 int i, dup_count = 0, phandle_count = 0;
244 for_each_of_allnodes(np) {
248 hash_for_each_possible(phandle_ht, nh, node, np->phandle) {
249 if (nh->np->phandle == np->phandle) {
250 pr_info("Duplicate phandle! %i used by %s and %s\n",
251 np->phandle, nh->np->full_name, np->full_name);
257 nh = kzalloc(sizeof(*nh), GFP_KERNEL);
262 hash_add(phandle_ht, &nh->node, np->phandle);
265 selftest(dup_count == 0, "Found %i duplicates in %i phandles\n",
266 dup_count, phandle_count);
269 hash_for_each_safe(phandle_ht, i, tmp, nh, node) {
275 static void __init of_selftest_parse_phandle_with_args(void)
277 struct device_node *np;
278 struct of_phandle_args args;
281 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
283 pr_err("missing testcase data\n");
287 rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
288 selftest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc);
290 for (i = 0; i < 8; i++) {
292 rc = of_parse_phandle_with_args(np, "phandle-list",
293 "#phandle-cells", i, &args);
295 /* Test the values from tests-phandle.dtsi */
299 passed &= (args.args_count == 1);
300 passed &= (args.args[0] == (i + 1));
304 passed &= (args.args_count == 2);
305 passed &= (args.args[0] == (i + 1));
306 passed &= (args.args[1] == 0);
309 passed &= (rc == -ENOENT);
313 passed &= (args.args_count == 3);
314 passed &= (args.args[0] == (i + 1));
315 passed &= (args.args[1] == 4);
316 passed &= (args.args[2] == 3);
320 passed &= (args.args_count == 2);
321 passed &= (args.args[0] == (i + 1));
322 passed &= (args.args[1] == 100);
326 passed &= (args.args_count == 0);
330 passed &= (args.args_count == 1);
331 passed &= (args.args[0] == (i + 1));
334 passed &= (rc == -ENOENT);
340 selftest(passed, "index %i - data error on node %s rc=%i\n",
341 i, args.np->full_name, rc);
344 /* Check for missing list property */
345 rc = of_parse_phandle_with_args(np, "phandle-list-missing",
346 "#phandle-cells", 0, &args);
347 selftest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
348 rc = of_count_phandle_with_args(np, "phandle-list-missing",
350 selftest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
352 /* Check for missing cells property */
353 rc = of_parse_phandle_with_args(np, "phandle-list",
354 "#phandle-cells-missing", 0, &args);
355 selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
356 rc = of_count_phandle_with_args(np, "phandle-list",
357 "#phandle-cells-missing");
358 selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
360 /* Check for bad phandle in list */
361 rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle",
362 "#phandle-cells", 0, &args);
363 selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
364 rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle",
366 selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
368 /* Check for incorrectly formed argument list */
369 rc = of_parse_phandle_with_args(np, "phandle-list-bad-args",
370 "#phandle-cells", 1, &args);
371 selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
372 rc = of_count_phandle_with_args(np, "phandle-list-bad-args",
374 selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
377 static void __init of_selftest_property_string(void)
379 const char *strings[4];
380 struct device_node *np;
383 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
385 pr_err("No testcase data in device tree\n");
389 rc = of_property_match_string(np, "phandle-list-names", "first");
390 selftest(rc == 0, "first expected:0 got:%i\n", rc);
391 rc = of_property_match_string(np, "phandle-list-names", "second");
392 selftest(rc == 1, "second expected:1 got:%i\n", rc);
393 rc = of_property_match_string(np, "phandle-list-names", "third");
394 selftest(rc == 2, "third expected:2 got:%i\n", rc);
395 rc = of_property_match_string(np, "phandle-list-names", "fourth");
396 selftest(rc == -ENODATA, "unmatched string; rc=%i\n", rc);
397 rc = of_property_match_string(np, "missing-property", "blah");
398 selftest(rc == -EINVAL, "missing property; rc=%i\n", rc);
399 rc = of_property_match_string(np, "empty-property", "blah");
400 selftest(rc == -ENODATA, "empty property; rc=%i\n", rc);
401 rc = of_property_match_string(np, "unterminated-string", "blah");
402 selftest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
404 /* of_property_count_strings() tests */
405 rc = of_property_count_strings(np, "string-property");
406 selftest(rc == 1, "Incorrect string count; rc=%i\n", rc);
407 rc = of_property_count_strings(np, "phandle-list-names");
408 selftest(rc == 3, "Incorrect string count; rc=%i\n", rc);
409 rc = of_property_count_strings(np, "unterminated-string");
410 selftest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
411 rc = of_property_count_strings(np, "unterminated-string-list");
412 selftest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
414 /* of_property_read_string_index() tests */
415 rc = of_property_read_string_index(np, "string-property", 0, strings);
416 selftest(rc == 0 && !strcmp(strings[0], "foobar"), "of_property_read_string_index() failure; rc=%i\n", rc);
418 rc = of_property_read_string_index(np, "string-property", 1, strings);
419 selftest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
420 rc = of_property_read_string_index(np, "phandle-list-names", 0, strings);
421 selftest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
422 rc = of_property_read_string_index(np, "phandle-list-names", 1, strings);
423 selftest(rc == 0 && !strcmp(strings[0], "second"), "of_property_read_string_index() failure; rc=%i\n", rc);
424 rc = of_property_read_string_index(np, "phandle-list-names", 2, strings);
425 selftest(rc == 0 && !strcmp(strings[0], "third"), "of_property_read_string_index() failure; rc=%i\n", rc);
427 rc = of_property_read_string_index(np, "phandle-list-names", 3, strings);
428 selftest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
430 rc = of_property_read_string_index(np, "unterminated-string", 0, strings);
431 selftest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
432 rc = of_property_read_string_index(np, "unterminated-string-list", 0, strings);
433 selftest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
435 rc = of_property_read_string_index(np, "unterminated-string-list", 2, strings); /* should fail */
436 selftest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
439 /* of_property_read_string_array() tests */
440 rc = of_property_read_string_array(np, "string-property", strings, 4);
441 selftest(rc == 1, "Incorrect string count; rc=%i\n", rc);
442 rc = of_property_read_string_array(np, "phandle-list-names", strings, 4);
443 selftest(rc == 3, "Incorrect string count; rc=%i\n", rc);
444 rc = of_property_read_string_array(np, "unterminated-string", strings, 4);
445 selftest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
446 /* -- An incorrectly formed string should cause a failure */
447 rc = of_property_read_string_array(np, "unterminated-string-list", strings, 4);
448 selftest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
449 /* -- parsing the correctly formed strings should still work: */
451 rc = of_property_read_string_array(np, "unterminated-string-list", strings, 2);
452 selftest(rc == 2 && strings[2] == NULL, "of_property_read_string_array() failure; rc=%i\n", rc);
454 rc = of_property_read_string_array(np, "phandle-list-names", strings, 1);
455 selftest(rc == 1 && strings[1] == NULL, "Overwrote end of string array; rc=%i, str='%s'\n", rc, strings[1]);
458 #define propcmp(p1, p2) (((p1)->length == (p2)->length) && \
459 (p1)->value && (p2)->value && \
460 !memcmp((p1)->value, (p2)->value, (p1)->length) && \
461 !strcmp((p1)->name, (p2)->name))
462 static void __init of_selftest_property_copy(void)
464 #ifdef CONFIG_OF_DYNAMIC
465 struct property p1 = { .name = "p1", .length = 0, .value = "" };
466 struct property p2 = { .name = "p2", .length = 5, .value = "abcd" };
467 struct property *new;
469 new = __of_prop_dup(&p1, GFP_KERNEL);
470 selftest(new && propcmp(&p1, new), "empty property didn't copy correctly\n");
475 new = __of_prop_dup(&p2, GFP_KERNEL);
476 selftest(new && propcmp(&p2, new), "non-empty property didn't copy correctly\n");
483 static void __init of_selftest_changeset(void)
485 #ifdef CONFIG_OF_DYNAMIC
486 struct property *ppadd, padd = { .name = "prop-add", .length = 0, .value = "" };
487 struct property *ppupdate, pupdate = { .name = "prop-update", .length = 5, .value = "abcd" };
488 struct property *ppremove;
489 struct device_node *n1, *n2, *n21, *nremove, *parent, *np;
490 struct of_changeset chgset;
492 n1 = __of_node_dup(NULL, "/testcase-data/changeset/n1");
493 selftest(n1, "testcase setup failure\n");
494 n2 = __of_node_dup(NULL, "/testcase-data/changeset/n2");
495 selftest(n2, "testcase setup failure\n");
496 n21 = __of_node_dup(NULL, "%s/%s", "/testcase-data/changeset/n2", "n21");
497 selftest(n21, "testcase setup failure %p\n", n21);
498 nremove = of_find_node_by_path("/testcase-data/changeset/node-remove");
499 selftest(nremove, "testcase setup failure\n");
500 ppadd = __of_prop_dup(&padd, GFP_KERNEL);
501 selftest(ppadd, "testcase setup failure\n");
502 ppupdate = __of_prop_dup(&pupdate, GFP_KERNEL);
503 selftest(ppupdate, "testcase setup failure\n");
504 parent = nremove->parent;
509 ppremove = of_find_property(parent, "prop-remove", NULL);
510 selftest(ppremove, "failed to find removal prop");
512 of_changeset_init(&chgset);
513 selftest(!of_changeset_attach_node(&chgset, n1), "fail attach n1\n");
514 selftest(!of_changeset_attach_node(&chgset, n2), "fail attach n2\n");
515 selftest(!of_changeset_detach_node(&chgset, nremove), "fail remove node\n");
516 selftest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n");
517 selftest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop\n");
518 selftest(!of_changeset_update_property(&chgset, parent, ppupdate), "fail update prop\n");
519 selftest(!of_changeset_remove_property(&chgset, parent, ppremove), "fail remove prop\n");
520 mutex_lock(&of_mutex);
521 selftest(!of_changeset_apply(&chgset), "apply failed\n");
522 mutex_unlock(&of_mutex);
524 /* Make sure node names are constructed correctly */
525 selftest((np = of_find_node_by_path("/testcase-data/changeset/n2/n21")),
526 "'%s' not added\n", n21->full_name);
529 mutex_lock(&of_mutex);
530 selftest(!of_changeset_revert(&chgset), "revert failed\n");
531 mutex_unlock(&of_mutex);
533 of_changeset_destroy(&chgset);
537 static void __init of_selftest_parse_interrupts(void)
539 struct device_node *np;
540 struct of_phandle_args args;
543 np = of_find_node_by_path("/testcase-data/interrupts/interrupts0");
545 pr_err("missing testcase data\n");
549 for (i = 0; i < 4; i++) {
552 rc = of_irq_parse_one(np, i, &args);
555 passed &= (args.args_count == 1);
556 passed &= (args.args[0] == (i + 1));
558 selftest(passed, "index %i - data error on node %s rc=%i\n",
559 i, args.np->full_name, rc);
563 np = of_find_node_by_path("/testcase-data/interrupts/interrupts1");
565 pr_err("missing testcase data\n");
569 for (i = 0; i < 4; i++) {
572 rc = of_irq_parse_one(np, i, &args);
574 /* Test the values from tests-phandle.dtsi */
578 passed &= (args.args_count == 1);
579 passed &= (args.args[0] == 9);
583 passed &= (args.args_count == 3);
584 passed &= (args.args[0] == 10);
585 passed &= (args.args[1] == 11);
586 passed &= (args.args[2] == 12);
590 passed &= (args.args_count == 2);
591 passed &= (args.args[0] == 13);
592 passed &= (args.args[1] == 14);
596 passed &= (args.args_count == 2);
597 passed &= (args.args[0] == 15);
598 passed &= (args.args[1] == 16);
603 selftest(passed, "index %i - data error on node %s rc=%i\n",
604 i, args.np->full_name, rc);
609 static void __init of_selftest_parse_interrupts_extended(void)
611 struct device_node *np;
612 struct of_phandle_args args;
615 np = of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0");
617 pr_err("missing testcase data\n");
621 for (i = 0; i < 7; i++) {
623 rc = of_irq_parse_one(np, i, &args);
625 /* Test the values from tests-phandle.dtsi */
629 passed &= (args.args_count == 1);
630 passed &= (args.args[0] == 1);
634 passed &= (args.args_count == 3);
635 passed &= (args.args[0] == 2);
636 passed &= (args.args[1] == 3);
637 passed &= (args.args[2] == 4);
641 passed &= (args.args_count == 2);
642 passed &= (args.args[0] == 5);
643 passed &= (args.args[1] == 6);
647 passed &= (args.args_count == 1);
648 passed &= (args.args[0] == 9);
652 passed &= (args.args_count == 3);
653 passed &= (args.args[0] == 10);
654 passed &= (args.args[1] == 11);
655 passed &= (args.args[2] == 12);
659 passed &= (args.args_count == 2);
660 passed &= (args.args[0] == 13);
661 passed &= (args.args[1] == 14);
665 passed &= (args.args_count == 1);
666 passed &= (args.args[0] == 15);
672 selftest(passed, "index %i - data error on node %s rc=%i\n",
673 i, args.np->full_name, rc);
678 static struct of_device_id match_node_table[] = {
679 { .data = "A", .name = "name0", }, /* Name alone is lowest priority */
680 { .data = "B", .type = "type1", }, /* followed by type alone */
682 { .data = "Ca", .name = "name2", .type = "type1", }, /* followed by both together */
683 { .data = "Cb", .name = "name2", }, /* Only match when type doesn't match */
684 { .data = "Cc", .name = "name2", .type = "type2", },
686 { .data = "E", .compatible = "compat3" },
687 { .data = "G", .compatible = "compat2", },
688 { .data = "H", .compatible = "compat2", .name = "name5", },
689 { .data = "I", .compatible = "compat2", .type = "type1", },
690 { .data = "J", .compatible = "compat2", .type = "type1", .name = "name8", },
691 { .data = "K", .compatible = "compat2", .name = "name9", },
698 } match_node_tests[] = {
699 { .path = "/testcase-data/match-node/name0", .data = "A", },
700 { .path = "/testcase-data/match-node/name1", .data = "B", },
701 { .path = "/testcase-data/match-node/a/name2", .data = "Ca", },
702 { .path = "/testcase-data/match-node/b/name2", .data = "Cb", },
703 { .path = "/testcase-data/match-node/c/name2", .data = "Cc", },
704 { .path = "/testcase-data/match-node/name3", .data = "E", },
705 { .path = "/testcase-data/match-node/name4", .data = "G", },
706 { .path = "/testcase-data/match-node/name5", .data = "H", },
707 { .path = "/testcase-data/match-node/name6", .data = "G", },
708 { .path = "/testcase-data/match-node/name7", .data = "I", },
709 { .path = "/testcase-data/match-node/name8", .data = "J", },
710 { .path = "/testcase-data/match-node/name9", .data = "K", },
713 static void __init of_selftest_match_node(void)
715 struct device_node *np;
716 const struct of_device_id *match;
719 for (i = 0; i < ARRAY_SIZE(match_node_tests); i++) {
720 np = of_find_node_by_path(match_node_tests[i].path);
722 selftest(0, "missing testcase node %s\n",
723 match_node_tests[i].path);
727 match = of_match_node(match_node_table, np);
729 selftest(0, "%s didn't match anything\n",
730 match_node_tests[i].path);
734 if (strcmp(match->data, match_node_tests[i].data) != 0) {
735 selftest(0, "%s got wrong match. expected %s, got %s\n",
736 match_node_tests[i].path, match_node_tests[i].data,
737 (const char *)match->data);
740 selftest(1, "passed");
744 struct device test_bus = {
745 .init_name = "unittest-bus",
747 static void __init of_selftest_platform_populate(void)
750 struct device_node *np, *child, *grandchild;
751 struct platform_device *pdev;
752 struct of_device_id match[] = {
753 { .compatible = "test-device", },
757 np = of_find_node_by_path("/testcase-data");
758 of_platform_populate(np, of_default_bus_match_table, NULL, NULL);
760 /* Test that a missing irq domain returns -EPROBE_DEFER */
761 np = of_find_node_by_path("/testcase-data/testcase-device1");
762 pdev = of_find_device_by_node(np);
763 selftest(pdev, "device 1 creation failed\n");
765 irq = platform_get_irq(pdev, 0);
766 selftest(irq == -EPROBE_DEFER, "device deferred probe failed - %d\n", irq);
768 /* Test that a parsing failure does not return -EPROBE_DEFER */
769 np = of_find_node_by_path("/testcase-data/testcase-device2");
770 pdev = of_find_device_by_node(np);
771 selftest(pdev, "device 2 creation failed\n");
772 irq = platform_get_irq(pdev, 0);
773 selftest(irq < 0 && irq != -EPROBE_DEFER, "device parsing error failed - %d\n", irq);
775 if (selftest(np = of_find_node_by_path("/testcase-data/platform-tests"),
776 "No testcase data in device tree\n"));
779 if (selftest(!(rc = device_register(&test_bus)),
780 "testbus registration failed; rc=%i\n", rc));
783 for_each_child_of_node(np, child) {
784 of_platform_populate(child, match, NULL, &test_bus);
785 for_each_child_of_node(child, grandchild)
786 selftest(of_find_device_by_node(grandchild),
787 "Could not create device for node '%s'\n",
791 of_platform_depopulate(&test_bus);
792 for_each_child_of_node(np, child) {
793 for_each_child_of_node(child, grandchild)
794 selftest(!of_find_device_by_node(grandchild),
795 "device didn't get destroyed '%s'\n",
799 device_unregister(&test_bus);
804 * update_node_properties - adds the properties
805 * of np into dup node (present in live tree) and
806 * updates parent of children of np to dup.
808 * @np: node already present in live tree
809 * @dup: node present in live tree to be updated
811 static void update_node_properties(struct device_node *np,
812 struct device_node *dup)
814 struct property *prop;
815 struct device_node *child;
817 for_each_property_of_node(np, prop)
818 of_add_property(dup, prop);
820 for_each_child_of_node(np, child)
825 * attach_node_and_children - attaches nodes
826 * and its children to live tree
828 * @np: Node to attach to live tree
830 static int attach_node_and_children(struct device_node *np)
832 struct device_node *next, *dup, *child;
835 dup = of_find_node_by_path(np->full_name);
837 update_node_properties(np, dup);
844 mutex_lock(&of_mutex);
845 raw_spin_lock_irqsave(&devtree_lock, flags);
846 np->sibling = np->parent->child;
847 np->parent->child = np;
848 of_node_clear_flag(np, OF_DETACHED);
849 raw_spin_unlock_irqrestore(&devtree_lock, flags);
851 __of_attach_node_sysfs(np);
852 mutex_unlock(&of_mutex);
855 next = child->sibling;
856 attach_node_and_children(child);
864 * selftest_data_add - Reads, copies data from
865 * linked tree and attaches it to the live tree
867 static int __init selftest_data_add(void)
870 struct device_node *selftest_data_node, *np;
871 extern uint8_t __dtb_testcases_begin[];
872 extern uint8_t __dtb_testcases_end[];
873 const int size = __dtb_testcases_end - __dtb_testcases_begin;
877 pr_warn("%s: No testcase data to attach; not running tests\n",
883 selftest_data = kmemdup(__dtb_testcases_begin, size, GFP_KERNEL);
885 if (!selftest_data) {
886 pr_warn("%s: Failed to allocate memory for selftest_data; "
887 "not running tests\n", __func__);
890 of_fdt_unflatten_tree(selftest_data, &selftest_data_node);
891 if (!selftest_data_node) {
892 pr_warn("%s: No tree to attach; not running tests\n", __func__);
895 of_node_set_flag(selftest_data_node, OF_DETACHED);
896 rc = of_resolve_phandles(selftest_data_node);
898 pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__, rc);
903 of_root = selftest_data_node;
904 for_each_of_allnodes(np)
905 __of_attach_node_sysfs(np);
906 of_aliases = of_find_node_by_path("/aliases");
907 of_chosen = of_find_node_by_path("/chosen");
911 /* attach the sub-tree to live tree */
912 np = selftest_data_node->child;
914 struct device_node *next = np->sibling;
915 np->parent = of_root;
916 attach_node_and_children(np);
922 #ifdef CONFIG_OF_OVERLAY
924 static int selftest_probe(struct platform_device *pdev)
926 struct device *dev = &pdev->dev;
927 struct device_node *np = dev->of_node;
930 dev_err(dev, "No OF data for device\n");
935 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
937 of_platform_populate(np, NULL, NULL, &pdev->dev);
942 static int selftest_remove(struct platform_device *pdev)
944 struct device *dev = &pdev->dev;
945 struct device_node *np = dev->of_node;
947 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
951 static struct of_device_id selftest_match[] = {
952 { .compatible = "selftest", },
956 static struct platform_driver selftest_driver = {
957 .probe = selftest_probe,
958 .remove = selftest_remove,
961 .owner = THIS_MODULE,
962 .of_match_table = of_match_ptr(selftest_match),
966 /* get the platform device instantiated at the path */
967 static struct platform_device *of_path_to_platform_device(const char *path)
969 struct device_node *np;
970 struct platform_device *pdev;
972 np = of_find_node_by_path(path);
976 pdev = of_find_device_by_node(np);
982 /* find out if a platform device exists at that path */
983 static int of_path_platform_device_exists(const char *path)
985 struct platform_device *pdev;
987 pdev = of_path_to_platform_device(path);
988 platform_device_put(pdev);
992 #if IS_BUILTIN(CONFIG_I2C)
994 /* get the i2c client device instantiated at the path */
995 static struct i2c_client *of_path_to_i2c_client(const char *path)
997 struct device_node *np;
998 struct i2c_client *client;
1000 np = of_find_node_by_path(path);
1004 client = of_find_i2c_device_by_node(np);
1010 /* find out if a i2c client device exists at that path */
1011 static int of_path_i2c_client_exists(const char *path)
1013 struct i2c_client *client;
1015 client = of_path_to_i2c_client(path);
1017 put_device(&client->dev);
1018 return client != NULL;
1021 static int of_path_i2c_client_exists(const char *path)
1032 static int of_path_device_type_exists(const char *path,
1033 enum overlay_type ovtype)
1037 return of_path_platform_device_exists(path);
1039 return of_path_i2c_client_exists(path);
1044 static const char *selftest_path(int nr, enum overlay_type ovtype)
1047 static char buf[256];
1051 base = "/testcase-data/overlay-node/test-bus";
1054 base = "/testcase-data/overlay-node/test-bus/i2c-test-bus";
1060 snprintf(buf, sizeof(buf) - 1, "%s/test-selftest%d", base, nr);
1061 buf[sizeof(buf) - 1] = '\0';
1065 static int of_selftest_device_exists(int selftest_nr, enum overlay_type ovtype)
1069 path = selftest_path(selftest_nr, ovtype);
1073 return of_path_platform_device_exists(path);
1075 return of_path_i2c_client_exists(path);
1080 static const char *overlay_path(int nr)
1082 static char buf[256];
1084 snprintf(buf, sizeof(buf) - 1,
1085 "/testcase-data/overlay%d", nr);
1086 buf[sizeof(buf) - 1] = '\0';
1091 static const char *bus_path = "/testcase-data/overlay-node/test-bus";
1093 static int of_selftest_apply_overlay(int selftest_nr, int overlay_nr,
1096 struct device_node *np = NULL;
1099 np = of_find_node_by_path(overlay_path(overlay_nr));
1101 selftest(0, "could not find overlay node @\"%s\"\n",
1102 overlay_path(overlay_nr));
1107 ret = of_overlay_create(np);
1109 selftest(0, "could not create overlay from \"%s\"\n",
1110 overlay_path(overlay_nr));
1126 /* apply an overlay while checking before and after states */
1127 static int of_selftest_apply_overlay_check(int overlay_nr, int selftest_nr,
1128 int before, int after, enum overlay_type ovtype)
1132 /* selftest device must not be in before state */
1133 if (of_selftest_device_exists(selftest_nr, ovtype) != before) {
1134 selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1135 overlay_path(overlay_nr),
1136 selftest_path(selftest_nr, ovtype),
1137 !before ? "enabled" : "disabled");
1141 ret = of_selftest_apply_overlay(overlay_nr, selftest_nr, NULL);
1143 /* of_selftest_apply_overlay already called selftest() */
1147 /* selftest device must be to set to after state */
1148 if (of_selftest_device_exists(selftest_nr, ovtype) != after) {
1149 selftest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n",
1150 overlay_path(overlay_nr),
1151 selftest_path(selftest_nr, ovtype),
1152 !after ? "enabled" : "disabled");
1159 /* apply an overlay and then revert it while checking before, after states */
1160 static int of_selftest_apply_revert_overlay_check(int overlay_nr,
1161 int selftest_nr, int before, int after,
1162 enum overlay_type ovtype)
1166 /* selftest device must be in before state */
1167 if (of_selftest_device_exists(selftest_nr, ovtype) != before) {
1168 selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1169 overlay_path(overlay_nr),
1170 selftest_path(selftest_nr, ovtype),
1171 !before ? "enabled" : "disabled");
1175 /* apply the overlay */
1176 ret = of_selftest_apply_overlay(overlay_nr, selftest_nr, &ov_id);
1178 /* of_selftest_apply_overlay already called selftest() */
1182 /* selftest device must be in after state */
1183 if (of_selftest_device_exists(selftest_nr, ovtype) != after) {
1184 selftest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n",
1185 overlay_path(overlay_nr),
1186 selftest_path(selftest_nr, ovtype),
1187 !after ? "enabled" : "disabled");
1191 ret = of_overlay_destroy(ov_id);
1193 selftest(0, "overlay @\"%s\" failed to be destroyed @\"%s\"\n",
1194 overlay_path(overlay_nr),
1195 selftest_path(selftest_nr, ovtype));
1199 /* selftest device must be again in before state */
1200 if (of_selftest_device_exists(selftest_nr, PDEV_OVERLAY) != before) {
1201 selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1202 overlay_path(overlay_nr),
1203 selftest_path(selftest_nr, ovtype),
1204 !before ? "enabled" : "disabled");
1211 /* test activation of device */
1212 static void of_selftest_overlay_0(void)
1216 /* device should enable */
1217 ret = of_selftest_apply_overlay_check(0, 0, 0, 1, PDEV_OVERLAY);
1221 selftest(1, "overlay test %d passed\n", 0);
1224 /* test deactivation of device */
1225 static void of_selftest_overlay_1(void)
1229 /* device should disable */
1230 ret = of_selftest_apply_overlay_check(1, 1, 1, 0, PDEV_OVERLAY);
1234 selftest(1, "overlay test %d passed\n", 1);
1237 /* test activation of device */
1238 static void of_selftest_overlay_2(void)
1242 /* device should enable */
1243 ret = of_selftest_apply_overlay_check(2, 2, 0, 1, PDEV_OVERLAY);
1247 selftest(1, "overlay test %d passed\n", 2);
1250 /* test deactivation of device */
1251 static void of_selftest_overlay_3(void)
1255 /* device should disable */
1256 ret = of_selftest_apply_overlay_check(3, 3, 1, 0, PDEV_OVERLAY);
1260 selftest(1, "overlay test %d passed\n", 3);
1263 /* test activation of a full device node */
1264 static void of_selftest_overlay_4(void)
1268 /* device should disable */
1269 ret = of_selftest_apply_overlay_check(4, 4, 0, 1, PDEV_OVERLAY);
1273 selftest(1, "overlay test %d passed\n", 4);
1276 /* test overlay apply/revert sequence */
1277 static void of_selftest_overlay_5(void)
1281 /* device should disable */
1282 ret = of_selftest_apply_revert_overlay_check(5, 5, 0, 1, PDEV_OVERLAY);
1286 selftest(1, "overlay test %d passed\n", 5);
1289 /* test overlay application in sequence */
1290 static void of_selftest_overlay_6(void)
1292 struct device_node *np;
1293 int ret, i, ov_id[2];
1294 int overlay_nr = 6, selftest_nr = 6;
1295 int before = 0, after = 1;
1297 /* selftest device must be in before state */
1298 for (i = 0; i < 2; i++) {
1299 if (of_selftest_device_exists(selftest_nr + i, PDEV_OVERLAY)
1301 selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1302 overlay_path(overlay_nr + i),
1303 selftest_path(selftest_nr + i,
1305 !before ? "enabled" : "disabled");
1310 /* apply the overlays */
1311 for (i = 0; i < 2; i++) {
1313 np = of_find_node_by_path(overlay_path(overlay_nr + i));
1315 selftest(0, "could not find overlay node @\"%s\"\n",
1316 overlay_path(overlay_nr + i));
1320 ret = of_overlay_create(np);
1322 selftest(0, "could not create overlay from \"%s\"\n",
1323 overlay_path(overlay_nr + i));
1329 for (i = 0; i < 2; i++) {
1330 /* selftest device must be in after state */
1331 if (of_selftest_device_exists(selftest_nr + i, PDEV_OVERLAY)
1333 selftest(0, "overlay @\"%s\" failed @\"%s\" %s\n",
1334 overlay_path(overlay_nr + i),
1335 selftest_path(selftest_nr + i,
1337 !after ? "enabled" : "disabled");
1342 for (i = 1; i >= 0; i--) {
1343 ret = of_overlay_destroy(ov_id[i]);
1345 selftest(0, "overlay @\"%s\" failed destroy @\"%s\"\n",
1346 overlay_path(overlay_nr + i),
1347 selftest_path(selftest_nr + i,
1353 for (i = 0; i < 2; i++) {
1354 /* selftest device must be again in before state */
1355 if (of_selftest_device_exists(selftest_nr + i, PDEV_OVERLAY)
1357 selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1358 overlay_path(overlay_nr + i),
1359 selftest_path(selftest_nr + i,
1361 !before ? "enabled" : "disabled");
1366 selftest(1, "overlay test %d passed\n", 6);
1369 /* test overlay application in sequence */
1370 static void of_selftest_overlay_8(void)
1372 struct device_node *np;
1373 int ret, i, ov_id[2];
1374 int overlay_nr = 8, selftest_nr = 8;
1376 /* we don't care about device state in this test */
1378 /* apply the overlays */
1379 for (i = 0; i < 2; i++) {
1381 np = of_find_node_by_path(overlay_path(overlay_nr + i));
1383 selftest(0, "could not find overlay node @\"%s\"\n",
1384 overlay_path(overlay_nr + i));
1388 ret = of_overlay_create(np);
1390 selftest(0, "could not create overlay from \"%s\"\n",
1391 overlay_path(overlay_nr + i));
1397 /* now try to remove first overlay (it should fail) */
1398 ret = of_overlay_destroy(ov_id[0]);
1400 selftest(0, "overlay @\"%s\" was destroyed @\"%s\"\n",
1401 overlay_path(overlay_nr + 0),
1402 selftest_path(selftest_nr,
1407 /* removing them in order should work */
1408 for (i = 1; i >= 0; i--) {
1409 ret = of_overlay_destroy(ov_id[i]);
1411 selftest(0, "overlay @\"%s\" not destroyed @\"%s\"\n",
1412 overlay_path(overlay_nr + i),
1413 selftest_path(selftest_nr,
1419 selftest(1, "overlay test %d passed\n", 8);
1422 /* test insertion of a bus with parent devices */
1423 static void of_selftest_overlay_10(void)
1428 /* device should disable */
1429 ret = of_selftest_apply_overlay_check(10, 10, 0, 1, PDEV_OVERLAY);
1430 if (selftest(ret == 0,
1431 "overlay test %d failed; overlay application\n", 10))
1434 child_path = kasprintf(GFP_KERNEL, "%s/test-selftest101",
1435 selftest_path(10, PDEV_OVERLAY));
1436 if (selftest(child_path, "overlay test %d failed; kasprintf\n", 10))
1439 ret = of_path_device_type_exists(child_path, PDEV_OVERLAY);
1441 if (selftest(ret, "overlay test %d failed; no child device\n", 10))
1445 /* test insertion of a bus with parent devices (and revert) */
1446 static void of_selftest_overlay_11(void)
1450 /* device should disable */
1451 ret = of_selftest_apply_revert_overlay_check(11, 11, 0, 1,
1453 if (selftest(ret == 0,
1454 "overlay test %d failed; overlay application\n", 11))
1458 #if IS_BUILTIN(CONFIG_I2C) && IS_ENABLED(CONFIG_OF_OVERLAY)
1460 struct selftest_i2c_bus_data {
1461 struct platform_device *pdev;
1462 struct i2c_adapter adap;
1465 static int selftest_i2c_master_xfer(struct i2c_adapter *adap,
1466 struct i2c_msg *msgs, int num)
1468 struct selftest_i2c_bus_data *std = i2c_get_adapdata(adap);
1475 static u32 selftest_i2c_functionality(struct i2c_adapter *adap)
1477 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
1480 static const struct i2c_algorithm selftest_i2c_algo = {
1481 .master_xfer = selftest_i2c_master_xfer,
1482 .functionality = selftest_i2c_functionality,
1485 static int selftest_i2c_bus_probe(struct platform_device *pdev)
1487 struct device *dev = &pdev->dev;
1488 struct device_node *np = dev->of_node;
1489 struct selftest_i2c_bus_data *std;
1490 struct i2c_adapter *adap;
1494 dev_err(dev, "No OF data for device\n");
1499 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1501 std = devm_kzalloc(dev, sizeof(*std), GFP_KERNEL);
1503 dev_err(dev, "Failed to allocate selftest i2c data\n");
1507 /* link them together */
1509 platform_set_drvdata(pdev, std);
1512 i2c_set_adapdata(adap, std);
1514 strlcpy(adap->name, pdev->name, sizeof(adap->name));
1515 adap->class = I2C_CLASS_DEPRECATED;
1516 adap->algo = &selftest_i2c_algo;
1517 adap->dev.parent = dev;
1518 adap->dev.of_node = dev->of_node;
1519 adap->timeout = 5 * HZ;
1522 ret = i2c_add_numbered_adapter(adap);
1524 dev_err(dev, "Failed to add I2C adapter\n");
1531 static int selftest_i2c_bus_remove(struct platform_device *pdev)
1533 struct device *dev = &pdev->dev;
1534 struct device_node *np = dev->of_node;
1535 struct selftest_i2c_bus_data *std = platform_get_drvdata(pdev);
1537 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1538 i2c_del_adapter(&std->adap);
1543 static struct of_device_id selftest_i2c_bus_match[] = {
1544 { .compatible = "selftest-i2c-bus", },
1548 static struct platform_driver selftest_i2c_bus_driver = {
1549 .probe = selftest_i2c_bus_probe,
1550 .remove = selftest_i2c_bus_remove,
1552 .name = "selftest-i2c-bus",
1553 .of_match_table = of_match_ptr(selftest_i2c_bus_match),
1557 static int selftest_i2c_dev_probe(struct i2c_client *client,
1558 const struct i2c_device_id *id)
1560 struct device *dev = &client->dev;
1561 struct device_node *np = client->dev.of_node;
1564 dev_err(dev, "No OF node\n");
1568 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1573 static int selftest_i2c_dev_remove(struct i2c_client *client)
1575 struct device *dev = &client->dev;
1576 struct device_node *np = client->dev.of_node;
1578 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1582 static const struct i2c_device_id selftest_i2c_dev_id[] = {
1583 { .name = "selftest-i2c-dev" },
1587 static struct i2c_driver selftest_i2c_dev_driver = {
1589 .name = "selftest-i2c-dev",
1590 .owner = THIS_MODULE,
1592 .probe = selftest_i2c_dev_probe,
1593 .remove = selftest_i2c_dev_remove,
1594 .id_table = selftest_i2c_dev_id,
1597 #if IS_BUILTIN(CONFIG_I2C_MUX)
1599 struct selftest_i2c_mux_data {
1601 struct i2c_adapter *adap[];
1604 static int selftest_i2c_mux_select_chan(struct i2c_adapter *adap,
1605 void *client, u32 chan)
1610 static int selftest_i2c_mux_probe(struct i2c_client *client,
1611 const struct i2c_device_id *id)
1613 int ret, i, nchans, size;
1614 struct device *dev = &client->dev;
1615 struct i2c_adapter *adap = to_i2c_adapter(dev->parent);
1616 struct device_node *np = client->dev.of_node, *child;
1617 struct selftest_i2c_mux_data *stm;
1620 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1623 dev_err(dev, "No OF node\n");
1628 for_each_child_of_node(np, child) {
1629 ret = of_property_read_u32(child, "reg", ®);
1632 if (max_reg == (u32)-1 || reg > max_reg)
1635 nchans = max_reg == (u32)-1 ? 0 : max_reg + 1;
1637 dev_err(dev, "No channels\n");
1641 size = offsetof(struct selftest_i2c_mux_data, adap[nchans]);
1642 stm = devm_kzalloc(dev, size, GFP_KERNEL);
1644 dev_err(dev, "Out of memory\n");
1647 stm->nchans = nchans;
1648 for (i = 0; i < nchans; i++) {
1649 stm->adap[i] = i2c_add_mux_adapter(adap, dev, client,
1650 0, i, 0, selftest_i2c_mux_select_chan, NULL);
1651 if (!stm->adap[i]) {
1652 dev_err(dev, "Failed to register mux #%d\n", i);
1653 for (i--; i >= 0; i--)
1654 i2c_del_mux_adapter(stm->adap[i]);
1659 i2c_set_clientdata(client, stm);
1664 static int selftest_i2c_mux_remove(struct i2c_client *client)
1666 struct device *dev = &client->dev;
1667 struct device_node *np = client->dev.of_node;
1668 struct selftest_i2c_mux_data *stm = i2c_get_clientdata(client);
1671 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1672 for (i = stm->nchans - 1; i >= 0; i--)
1673 i2c_del_mux_adapter(stm->adap[i]);
1677 static const struct i2c_device_id selftest_i2c_mux_id[] = {
1678 { .name = "selftest-i2c-mux" },
1682 static struct i2c_driver selftest_i2c_mux_driver = {
1684 .name = "selftest-i2c-mux",
1685 .owner = THIS_MODULE,
1687 .probe = selftest_i2c_mux_probe,
1688 .remove = selftest_i2c_mux_remove,
1689 .id_table = selftest_i2c_mux_id,
1694 static int of_selftest_overlay_i2c_init(void)
1698 ret = i2c_add_driver(&selftest_i2c_dev_driver);
1699 if (selftest(ret == 0,
1700 "could not register selftest i2c device driver\n"))
1703 ret = platform_driver_register(&selftest_i2c_bus_driver);
1704 if (selftest(ret == 0,
1705 "could not register selftest i2c bus driver\n"))
1708 #if IS_BUILTIN(CONFIG_I2C_MUX)
1709 ret = i2c_add_driver(&selftest_i2c_mux_driver);
1710 if (selftest(ret == 0,
1711 "could not register selftest i2c mux driver\n"))
1718 static void of_selftest_overlay_i2c_cleanup(void)
1720 #if IS_BUILTIN(CONFIG_I2C_MUX)
1721 i2c_del_driver(&selftest_i2c_mux_driver);
1723 platform_driver_unregister(&selftest_i2c_bus_driver);
1724 i2c_del_driver(&selftest_i2c_dev_driver);
1727 static void of_selftest_overlay_i2c_12(void)
1731 /* device should enable */
1732 ret = of_selftest_apply_overlay_check(12, 12, 0, 1, I2C_OVERLAY);
1736 selftest(1, "overlay test %d passed\n", 12);
1739 /* test deactivation of device */
1740 static void of_selftest_overlay_i2c_13(void)
1744 /* device should disable */
1745 ret = of_selftest_apply_overlay_check(13, 13, 1, 0, I2C_OVERLAY);
1749 selftest(1, "overlay test %d passed\n", 13);
1752 /* just check for i2c mux existence */
1753 static void of_selftest_overlay_i2c_14(void)
1757 static void of_selftest_overlay_i2c_15(void)
1761 /* device should enable */
1762 ret = of_selftest_apply_overlay_check(16, 15, 0, 1, I2C_OVERLAY);
1766 selftest(1, "overlay test %d passed\n", 15);
1771 static inline void of_selftest_overlay_i2c_14(void) { }
1772 static inline void of_selftest_overlay_i2c_15(void) { }
1776 static void __init of_selftest_overlay(void)
1778 struct device_node *bus_np = NULL;
1781 ret = platform_driver_register(&selftest_driver);
1783 selftest(0, "could not register selftest driver\n");
1787 bus_np = of_find_node_by_path(bus_path);
1788 if (bus_np == NULL) {
1789 selftest(0, "could not find bus_path \"%s\"\n", bus_path);
1793 ret = of_platform_populate(bus_np, of_default_bus_match_table,
1796 selftest(0, "could not populate bus @ \"%s\"\n", bus_path);
1800 if (!of_selftest_device_exists(100, PDEV_OVERLAY)) {
1801 selftest(0, "could not find selftest0 @ \"%s\"\n",
1802 selftest_path(100, PDEV_OVERLAY));
1806 if (of_selftest_device_exists(101, PDEV_OVERLAY)) {
1807 selftest(0, "selftest1 @ \"%s\" should not exist\n",
1808 selftest_path(101, PDEV_OVERLAY));
1812 selftest(1, "basic infrastructure of overlays passed");
1814 /* tests in sequence */
1815 of_selftest_overlay_0();
1816 of_selftest_overlay_1();
1817 of_selftest_overlay_2();
1818 of_selftest_overlay_3();
1819 of_selftest_overlay_4();
1820 of_selftest_overlay_5();
1821 of_selftest_overlay_6();
1822 of_selftest_overlay_8();
1824 of_selftest_overlay_10();
1825 of_selftest_overlay_11();
1827 #if IS_BUILTIN(CONFIG_I2C)
1828 if (selftest(of_selftest_overlay_i2c_init() == 0, "i2c init failed\n"))
1831 of_selftest_overlay_i2c_12();
1832 of_selftest_overlay_i2c_13();
1833 of_selftest_overlay_i2c_14();
1834 of_selftest_overlay_i2c_15();
1836 of_selftest_overlay_i2c_cleanup();
1840 of_node_put(bus_np);
1844 static inline void __init of_selftest_overlay(void) { }
1847 static int __init of_selftest(void)
1849 struct device_node *np;
1852 /* adding data for selftest */
1853 res = selftest_data_add();
1857 of_aliases = of_find_node_by_path("/aliases");
1859 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
1861 pr_info("No testcase data in device tree; not running tests\n");
1866 pr_info("start of selftest - you will see error messages\n");
1867 of_selftest_check_tree_linkage();
1868 of_selftest_check_phandles();
1869 of_selftest_find_node_by_name();
1870 of_selftest_dynamic();
1871 of_selftest_parse_phandle_with_args();
1872 of_selftest_property_string();
1873 of_selftest_property_copy();
1874 of_selftest_changeset();
1875 of_selftest_parse_interrupts();
1876 of_selftest_parse_interrupts_extended();
1877 of_selftest_match_node();
1878 of_selftest_platform_populate();
1879 of_selftest_overlay();
1881 /* Double check linkage after removing testcase data */
1882 of_selftest_check_tree_linkage();
1884 pr_info("end of selftest - %i passed, %i failed\n",
1885 selftest_results.passed, selftest_results.failed);
1889 late_initcall(of_selftest);