1 // SPDX-License-Identifier: GPL-2.0
3 * Self tests for device tree subsystem
6 #define pr_fmt(fmt) "### dt-test ### " fmt
8 #include <linux/memblock.h>
10 #include <linux/err.h>
11 #include <linux/errno.h>
12 #include <linux/hashtable.h>
13 #include <linux/libfdt.h>
15 #include <linux/of_fdt.h>
16 #include <linux/of_irq.h>
17 #include <linux/of_platform.h>
18 #include <linux/list.h>
19 #include <linux/mutex.h>
20 #include <linux/slab.h>
21 #include <linux/device.h>
22 #include <linux/platform_device.h>
24 #include <linux/i2c.h>
25 #include <linux/i2c-mux.h>
27 #include <linux/bitops.h>
29 #include "of_private.h"
31 static struct unittest_results {
36 #define unittest(result, fmt, ...) ({ \
37 bool failed = !(result); \
39 unittest_results.failed++; \
40 pr_err("FAIL %s():%i " fmt, __func__, __LINE__, ##__VA_ARGS__); \
42 unittest_results.passed++; \
43 pr_debug("pass %s():%i\n", __func__, __LINE__); \
48 static void __init of_unittest_find_node_by_name(void)
50 struct device_node *np;
51 const char *options, *name;
53 np = of_find_node_by_path("/testcase-data");
54 name = kasprintf(GFP_KERNEL, "%pOF", np);
55 unittest(np && !strcmp("/testcase-data", name),
56 "find /testcase-data failed\n");
60 /* Test if trailing '/' works */
61 np = of_find_node_by_path("/testcase-data/");
62 unittest(!np, "trailing '/' on /testcase-data/ should fail\n");
64 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
65 name = kasprintf(GFP_KERNEL, "%pOF", np);
66 unittest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", name),
67 "find /testcase-data/phandle-tests/consumer-a failed\n");
71 np = of_find_node_by_path("testcase-alias");
72 name = kasprintf(GFP_KERNEL, "%pOF", np);
73 unittest(np && !strcmp("/testcase-data", name),
74 "find testcase-alias failed\n");
78 /* Test if trailing '/' works on aliases */
79 np = of_find_node_by_path("testcase-alias/");
80 unittest(!np, "trailing '/' on testcase-alias/ should fail\n");
82 np = of_find_node_by_path("testcase-alias/phandle-tests/consumer-a");
83 name = kasprintf(GFP_KERNEL, "%pOF", np);
84 unittest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", name),
85 "find testcase-alias/phandle-tests/consumer-a failed\n");
89 np = of_find_node_by_path("/testcase-data/missing-path");
90 unittest(!np, "non-existent path returned node %pOF\n", np);
93 np = of_find_node_by_path("missing-alias");
94 unittest(!np, "non-existent alias returned node %pOF\n", np);
97 np = of_find_node_by_path("testcase-alias/missing-path");
98 unittest(!np, "non-existent alias with relative path returned node %pOF\n", np);
101 np = of_find_node_opts_by_path("/testcase-data:testoption", &options);
102 unittest(np && !strcmp("testoption", options),
103 "option path test failed\n");
106 np = of_find_node_opts_by_path("/testcase-data:test/option", &options);
107 unittest(np && !strcmp("test/option", options),
108 "option path test, subcase #1 failed\n");
111 np = of_find_node_opts_by_path("/testcase-data/testcase-device1:test/option", &options);
112 unittest(np && !strcmp("test/option", options),
113 "option path test, subcase #2 failed\n");
116 np = of_find_node_opts_by_path("/testcase-data:testoption", NULL);
117 unittest(np, "NULL option path test failed\n");
120 np = of_find_node_opts_by_path("testcase-alias:testaliasoption",
122 unittest(np && !strcmp("testaliasoption", options),
123 "option alias path test failed\n");
126 np = of_find_node_opts_by_path("testcase-alias:test/alias/option",
128 unittest(np && !strcmp("test/alias/option", options),
129 "option alias path test, subcase #1 failed\n");
132 np = of_find_node_opts_by_path("testcase-alias:testaliasoption", NULL);
133 unittest(np, "NULL option alias path test failed\n");
136 options = "testoption";
137 np = of_find_node_opts_by_path("testcase-alias", &options);
138 unittest(np && !options, "option clearing test failed\n");
141 options = "testoption";
142 np = of_find_node_opts_by_path("/", &options);
143 unittest(np && !options, "option clearing root node test failed\n");
147 static void __init of_unittest_dynamic(void)
149 struct device_node *np;
150 struct property *prop;
152 np = of_find_node_by_path("/testcase-data");
154 pr_err("missing testcase data\n");
158 /* Array of 4 properties for the purpose of testing */
159 prop = kcalloc(4, sizeof(*prop), GFP_KERNEL);
161 unittest(0, "kzalloc() failed\n");
165 /* Add a new property - should pass*/
166 prop->name = "new-property";
167 prop->value = "new-property-data";
168 prop->length = strlen(prop->value) + 1;
169 unittest(of_add_property(np, prop) == 0, "Adding a new property failed\n");
171 /* Try to add an existing property - should fail */
173 prop->name = "new-property";
174 prop->value = "new-property-data-should-fail";
175 prop->length = strlen(prop->value) + 1;
176 unittest(of_add_property(np, prop) != 0,
177 "Adding an existing property should have failed\n");
179 /* Try to modify an existing property - should pass */
180 prop->value = "modify-property-data-should-pass";
181 prop->length = strlen(prop->value) + 1;
182 unittest(of_update_property(np, prop) == 0,
183 "Updating an existing property should have passed\n");
185 /* Try to modify non-existent property - should pass*/
187 prop->name = "modify-property";
188 prop->value = "modify-missing-property-data-should-pass";
189 prop->length = strlen(prop->value) + 1;
190 unittest(of_update_property(np, prop) == 0,
191 "Updating a missing property should have passed\n");
193 /* Remove property - should pass */
194 unittest(of_remove_property(np, prop) == 0,
195 "Removing a property should have passed\n");
197 /* Adding very large property - should pass */
199 prop->name = "large-property-PAGE_SIZEx8";
200 prop->length = PAGE_SIZE * 8;
201 prop->value = kzalloc(prop->length, GFP_KERNEL);
202 unittest(prop->value != NULL, "Unable to allocate large buffer\n");
204 unittest(of_add_property(np, prop) == 0,
205 "Adding a large property should have passed\n");
208 static int __init of_unittest_check_node_linkage(struct device_node *np)
210 struct device_node *child;
213 for_each_child_of_node(np, child) {
214 if (child->parent != np) {
215 pr_err("Child node %pOFn links to wrong parent %pOFn\n",
221 rc = of_unittest_check_node_linkage(child);
233 static void __init of_unittest_check_tree_linkage(void)
235 struct device_node *np;
236 int allnode_count = 0, child_count;
241 for_each_of_allnodes(np)
243 child_count = of_unittest_check_node_linkage(of_root);
245 unittest(child_count > 0, "Device node data structure is corrupted\n");
246 unittest(child_count == allnode_count,
247 "allnodes list size (%i) doesn't match sibling lists size (%i)\n",
248 allnode_count, child_count);
249 pr_debug("allnodes list size (%i); sibling lists size (%i)\n", allnode_count, child_count);
252 static void __init of_unittest_printf_one(struct device_node *np, const char *fmt,
253 const char *expected)
259 buf_size = strlen(expected) + 10;
260 buf = kmalloc(buf_size, GFP_KERNEL);
264 /* Baseline; check conversion with a large size limit */
265 memset(buf, 0xff, buf_size);
266 size = snprintf(buf, buf_size - 2, fmt, np);
268 /* use strcmp() instead of strncmp() here to be absolutely sure strings match */
269 unittest((strcmp(buf, expected) == 0) && (buf[size+1] == 0xff),
270 "sprintf failed; fmt='%s' expected='%s' rslt='%s'\n",
273 /* Make sure length limits work */
275 for (i = 0; i < 2; i++, size--) {
276 /* Clear the buffer, and make sure it works correctly still */
277 memset(buf, 0xff, buf_size);
278 snprintf(buf, size+1, fmt, np);
279 unittest(strncmp(buf, expected, size) == 0 && (buf[size+1] == 0xff),
280 "snprintf failed; size=%i fmt='%s' expected='%s' rslt='%s'\n",
281 size, fmt, expected, buf);
286 static void __init of_unittest_printf(void)
288 struct device_node *np;
289 const char *full_name = "/testcase-data/platform-tests/test-device@1/dev@100";
290 char phandle_str[16] = "";
292 np = of_find_node_by_path(full_name);
294 unittest(np, "testcase data missing\n");
298 num_to_str(phandle_str, sizeof(phandle_str), np->phandle, 0);
300 of_unittest_printf_one(np, "%pOF", full_name);
301 of_unittest_printf_one(np, "%pOFf", full_name);
302 of_unittest_printf_one(np, "%pOFn", "dev");
303 of_unittest_printf_one(np, "%2pOFn", "dev");
304 of_unittest_printf_one(np, "%5pOFn", " dev");
305 of_unittest_printf_one(np, "%pOFnc", "dev:test-sub-device");
306 of_unittest_printf_one(np, "%pOFp", phandle_str);
307 of_unittest_printf_one(np, "%pOFP", "dev@100");
308 of_unittest_printf_one(np, "ABC %pOFP ABC", "ABC dev@100 ABC");
309 of_unittest_printf_one(np, "%10pOFP", " dev@100");
310 of_unittest_printf_one(np, "%-10pOFP", "dev@100 ");
311 of_unittest_printf_one(of_root, "%pOFP", "/");
312 of_unittest_printf_one(np, "%pOFF", "----");
313 of_unittest_printf_one(np, "%pOFPF", "dev@100:----");
314 of_unittest_printf_one(np, "%pOFPFPc", "dev@100:----:dev@100:test-sub-device");
315 of_unittest_printf_one(np, "%pOFc", "test-sub-device");
316 of_unittest_printf_one(np, "%pOFC",
317 "\"test-sub-device\",\"test-compat2\",\"test-compat3\"");
321 struct hlist_node node;
322 struct device_node *np;
325 static DEFINE_HASHTABLE(phandle_ht, 8);
326 static void __init of_unittest_check_phandles(void)
328 struct device_node *np;
329 struct node_hash *nh;
330 struct hlist_node *tmp;
331 int i, dup_count = 0, phandle_count = 0;
333 for_each_of_allnodes(np) {
337 hash_for_each_possible(phandle_ht, nh, node, np->phandle) {
338 if (nh->np->phandle == np->phandle) {
339 pr_info("Duplicate phandle! %i used by %pOF and %pOF\n",
340 np->phandle, nh->np, np);
346 nh = kzalloc(sizeof(*nh), GFP_KERNEL);
351 hash_add(phandle_ht, &nh->node, np->phandle);
354 unittest(dup_count == 0, "Found %i duplicates in %i phandles\n",
355 dup_count, phandle_count);
358 hash_for_each_safe(phandle_ht, i, tmp, nh, node) {
364 static void __init of_unittest_parse_phandle_with_args(void)
366 struct device_node *np;
367 struct of_phandle_args args;
370 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
372 pr_err("missing testcase data\n");
376 rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
377 unittest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc);
379 for (i = 0; i < 8; i++) {
382 memset(&args, 0, sizeof(args));
383 rc = of_parse_phandle_with_args(np, "phandle-list",
384 "#phandle-cells", i, &args);
386 /* Test the values from tests-phandle.dtsi */
390 passed &= (args.args_count == 1);
391 passed &= (args.args[0] == (i + 1));
395 passed &= (args.args_count == 2);
396 passed &= (args.args[0] == (i + 1));
397 passed &= (args.args[1] == 0);
400 passed &= (rc == -ENOENT);
404 passed &= (args.args_count == 3);
405 passed &= (args.args[0] == (i + 1));
406 passed &= (args.args[1] == 4);
407 passed &= (args.args[2] == 3);
411 passed &= (args.args_count == 2);
412 passed &= (args.args[0] == (i + 1));
413 passed &= (args.args[1] == 100);
417 passed &= (args.args_count == 0);
421 passed &= (args.args_count == 1);
422 passed &= (args.args[0] == (i + 1));
425 passed &= (rc == -ENOENT);
431 unittest(passed, "index %i - data error on node %pOF rc=%i\n",
435 /* Check for missing list property */
436 memset(&args, 0, sizeof(args));
437 rc = of_parse_phandle_with_args(np, "phandle-list-missing",
438 "#phandle-cells", 0, &args);
439 unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
440 rc = of_count_phandle_with_args(np, "phandle-list-missing",
442 unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
444 /* Check for missing cells property */
445 memset(&args, 0, sizeof(args));
446 rc = of_parse_phandle_with_args(np, "phandle-list",
447 "#phandle-cells-missing", 0, &args);
448 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
449 rc = of_count_phandle_with_args(np, "phandle-list",
450 "#phandle-cells-missing");
451 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
453 /* Check for bad phandle in list */
454 memset(&args, 0, sizeof(args));
455 rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle",
456 "#phandle-cells", 0, &args);
457 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
458 rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle",
460 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
462 /* Check for incorrectly formed argument list */
463 memset(&args, 0, sizeof(args));
464 rc = of_parse_phandle_with_args(np, "phandle-list-bad-args",
465 "#phandle-cells", 1, &args);
466 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
467 rc = of_count_phandle_with_args(np, "phandle-list-bad-args",
469 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
472 static void __init of_unittest_parse_phandle_with_args_map(void)
474 struct device_node *np, *p0, *p1, *p2, *p3;
475 struct of_phandle_args args;
478 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-b");
480 pr_err("missing testcase data\n");
484 p0 = of_find_node_by_path("/testcase-data/phandle-tests/provider0");
486 pr_err("missing testcase data\n");
490 p1 = of_find_node_by_path("/testcase-data/phandle-tests/provider1");
492 pr_err("missing testcase data\n");
496 p2 = of_find_node_by_path("/testcase-data/phandle-tests/provider2");
498 pr_err("missing testcase data\n");
502 p3 = of_find_node_by_path("/testcase-data/phandle-tests/provider3");
504 pr_err("missing testcase data\n");
508 rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
509 unittest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc);
511 for (i = 0; i < 8; i++) {
514 memset(&args, 0, sizeof(args));
515 rc = of_parse_phandle_with_args_map(np, "phandle-list",
516 "phandle", i, &args);
518 /* Test the values from tests-phandle.dtsi */
522 passed &= (args.np == p1);
523 passed &= (args.args_count == 1);
524 passed &= (args.args[0] == 1);
528 passed &= (args.np == p3);
529 passed &= (args.args_count == 3);
530 passed &= (args.args[0] == 2);
531 passed &= (args.args[1] == 5);
532 passed &= (args.args[2] == 3);
535 passed &= (rc == -ENOENT);
539 passed &= (args.np == p0);
540 passed &= (args.args_count == 0);
544 passed &= (args.np == p1);
545 passed &= (args.args_count == 1);
546 passed &= (args.args[0] == 3);
550 passed &= (args.np == p0);
551 passed &= (args.args_count == 0);
555 passed &= (args.np == p2);
556 passed &= (args.args_count == 2);
557 passed &= (args.args[0] == 15);
558 passed &= (args.args[1] == 0x20);
561 passed &= (rc == -ENOENT);
567 unittest(passed, "index %i - data error on node %s rc=%i\n",
568 i, args.np->full_name, rc);
571 /* Check for missing list property */
572 memset(&args, 0, sizeof(args));
573 rc = of_parse_phandle_with_args_map(np, "phandle-list-missing",
574 "phandle", 0, &args);
575 unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
577 /* Check for missing cells,map,mask property */
578 memset(&args, 0, sizeof(args));
579 rc = of_parse_phandle_with_args_map(np, "phandle-list",
580 "phandle-missing", 0, &args);
581 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
583 /* Check for bad phandle in list */
584 memset(&args, 0, sizeof(args));
585 rc = of_parse_phandle_with_args_map(np, "phandle-list-bad-phandle",
586 "phandle", 0, &args);
587 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
589 /* Check for incorrectly formed argument list */
590 memset(&args, 0, sizeof(args));
591 rc = of_parse_phandle_with_args_map(np, "phandle-list-bad-args",
592 "phandle", 1, &args);
593 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
596 static void __init of_unittest_property_string(void)
598 const char *strings[4];
599 struct device_node *np;
602 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
604 pr_err("No testcase data in device tree\n");
608 rc = of_property_match_string(np, "phandle-list-names", "first");
609 unittest(rc == 0, "first expected:0 got:%i\n", rc);
610 rc = of_property_match_string(np, "phandle-list-names", "second");
611 unittest(rc == 1, "second expected:1 got:%i\n", rc);
612 rc = of_property_match_string(np, "phandle-list-names", "third");
613 unittest(rc == 2, "third expected:2 got:%i\n", rc);
614 rc = of_property_match_string(np, "phandle-list-names", "fourth");
615 unittest(rc == -ENODATA, "unmatched string; rc=%i\n", rc);
616 rc = of_property_match_string(np, "missing-property", "blah");
617 unittest(rc == -EINVAL, "missing property; rc=%i\n", rc);
618 rc = of_property_match_string(np, "empty-property", "blah");
619 unittest(rc == -ENODATA, "empty property; rc=%i\n", rc);
620 rc = of_property_match_string(np, "unterminated-string", "blah");
621 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
623 /* of_property_count_strings() tests */
624 rc = of_property_count_strings(np, "string-property");
625 unittest(rc == 1, "Incorrect string count; rc=%i\n", rc);
626 rc = of_property_count_strings(np, "phandle-list-names");
627 unittest(rc == 3, "Incorrect string count; rc=%i\n", rc);
628 rc = of_property_count_strings(np, "unterminated-string");
629 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
630 rc = of_property_count_strings(np, "unterminated-string-list");
631 unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
633 /* of_property_read_string_index() tests */
634 rc = of_property_read_string_index(np, "string-property", 0, strings);
635 unittest(rc == 0 && !strcmp(strings[0], "foobar"), "of_property_read_string_index() failure; rc=%i\n", rc);
637 rc = of_property_read_string_index(np, "string-property", 1, strings);
638 unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
639 rc = of_property_read_string_index(np, "phandle-list-names", 0, strings);
640 unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
641 rc = of_property_read_string_index(np, "phandle-list-names", 1, strings);
642 unittest(rc == 0 && !strcmp(strings[0], "second"), "of_property_read_string_index() failure; rc=%i\n", rc);
643 rc = of_property_read_string_index(np, "phandle-list-names", 2, strings);
644 unittest(rc == 0 && !strcmp(strings[0], "third"), "of_property_read_string_index() failure; rc=%i\n", rc);
646 rc = of_property_read_string_index(np, "phandle-list-names", 3, strings);
647 unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
649 rc = of_property_read_string_index(np, "unterminated-string", 0, strings);
650 unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
651 rc = of_property_read_string_index(np, "unterminated-string-list", 0, strings);
652 unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
654 rc = of_property_read_string_index(np, "unterminated-string-list", 2, strings); /* should fail */
655 unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
658 /* of_property_read_string_array() tests */
659 rc = of_property_read_string_array(np, "string-property", strings, 4);
660 unittest(rc == 1, "Incorrect string count; rc=%i\n", rc);
661 rc = of_property_read_string_array(np, "phandle-list-names", strings, 4);
662 unittest(rc == 3, "Incorrect string count; rc=%i\n", rc);
663 rc = of_property_read_string_array(np, "unterminated-string", strings, 4);
664 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
665 /* -- An incorrectly formed string should cause a failure */
666 rc = of_property_read_string_array(np, "unterminated-string-list", strings, 4);
667 unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
668 /* -- parsing the correctly formed strings should still work: */
670 rc = of_property_read_string_array(np, "unterminated-string-list", strings, 2);
671 unittest(rc == 2 && strings[2] == NULL, "of_property_read_string_array() failure; rc=%i\n", rc);
673 rc = of_property_read_string_array(np, "phandle-list-names", strings, 1);
674 unittest(rc == 1 && strings[1] == NULL, "Overwrote end of string array; rc=%i, str='%s'\n", rc, strings[1]);
677 #define propcmp(p1, p2) (((p1)->length == (p2)->length) && \
678 (p1)->value && (p2)->value && \
679 !memcmp((p1)->value, (p2)->value, (p1)->length) && \
680 !strcmp((p1)->name, (p2)->name))
681 static void __init of_unittest_property_copy(void)
683 #ifdef CONFIG_OF_DYNAMIC
684 struct property p1 = { .name = "p1", .length = 0, .value = "" };
685 struct property p2 = { .name = "p2", .length = 5, .value = "abcd" };
686 struct property *new;
688 new = __of_prop_dup(&p1, GFP_KERNEL);
689 unittest(new && propcmp(&p1, new), "empty property didn't copy correctly\n");
694 new = __of_prop_dup(&p2, GFP_KERNEL);
695 unittest(new && propcmp(&p2, new), "non-empty property didn't copy correctly\n");
702 static void __init of_unittest_changeset(void)
704 #ifdef CONFIG_OF_DYNAMIC
705 struct property *ppadd, padd = { .name = "prop-add", .length = 1, .value = "" };
706 struct property *ppname_n1, pname_n1 = { .name = "name", .length = 3, .value = "n1" };
707 struct property *ppname_n2, pname_n2 = { .name = "name", .length = 3, .value = "n2" };
708 struct property *ppname_n21, pname_n21 = { .name = "name", .length = 3, .value = "n21" };
709 struct property *ppupdate, pupdate = { .name = "prop-update", .length = 5, .value = "abcd" };
710 struct property *ppremove;
711 struct device_node *n1, *n2, *n21, *nchangeset, *nremove, *parent, *np;
712 struct of_changeset chgset;
714 n1 = __of_node_dup(NULL, "n1");
715 unittest(n1, "testcase setup failure\n");
717 n2 = __of_node_dup(NULL, "n2");
718 unittest(n2, "testcase setup failure\n");
720 n21 = __of_node_dup(NULL, "n21");
721 unittest(n21, "testcase setup failure %p\n", n21);
723 nchangeset = of_find_node_by_path("/testcase-data/changeset");
724 nremove = of_get_child_by_name(nchangeset, "node-remove");
725 unittest(nremove, "testcase setup failure\n");
727 ppadd = __of_prop_dup(&padd, GFP_KERNEL);
728 unittest(ppadd, "testcase setup failure\n");
730 ppname_n1 = __of_prop_dup(&pname_n1, GFP_KERNEL);
731 unittest(ppname_n1, "testcase setup failure\n");
733 ppname_n2 = __of_prop_dup(&pname_n2, GFP_KERNEL);
734 unittest(ppname_n2, "testcase setup failure\n");
736 ppname_n21 = __of_prop_dup(&pname_n21, GFP_KERNEL);
737 unittest(ppname_n21, "testcase setup failure\n");
739 ppupdate = __of_prop_dup(&pupdate, GFP_KERNEL);
740 unittest(ppupdate, "testcase setup failure\n");
747 ppremove = of_find_property(parent, "prop-remove", NULL);
748 unittest(ppremove, "failed to find removal prop");
750 of_changeset_init(&chgset);
752 unittest(!of_changeset_attach_node(&chgset, n1), "fail attach n1\n");
753 unittest(!of_changeset_add_property(&chgset, n1, ppname_n1), "fail add prop name\n");
755 unittest(!of_changeset_attach_node(&chgset, n2), "fail attach n2\n");
756 unittest(!of_changeset_add_property(&chgset, n2, ppname_n2), "fail add prop name\n");
758 unittest(!of_changeset_detach_node(&chgset, nremove), "fail remove node\n");
759 unittest(!of_changeset_add_property(&chgset, n21, ppname_n21), "fail add prop name\n");
761 unittest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n");
763 unittest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop prop-add\n");
764 unittest(!of_changeset_update_property(&chgset, parent, ppupdate), "fail update prop\n");
765 unittest(!of_changeset_remove_property(&chgset, parent, ppremove), "fail remove prop\n");
767 unittest(!of_changeset_apply(&chgset), "apply failed\n");
769 of_node_put(nchangeset);
771 /* Make sure node names are constructed correctly */
772 unittest((np = of_find_node_by_path("/testcase-data/changeset/n2/n21")),
773 "'%pOF' not added\n", n21);
776 unittest(!of_changeset_revert(&chgset), "revert failed\n");
778 of_changeset_destroy(&chgset);
782 static void __init of_unittest_parse_interrupts(void)
784 struct device_node *np;
785 struct of_phandle_args args;
788 if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)
791 np = of_find_node_by_path("/testcase-data/interrupts/interrupts0");
793 pr_err("missing testcase data\n");
797 for (i = 0; i < 4; i++) {
800 memset(&args, 0, sizeof(args));
801 rc = of_irq_parse_one(np, i, &args);
804 passed &= (args.args_count == 1);
805 passed &= (args.args[0] == (i + 1));
807 unittest(passed, "index %i - data error on node %pOF rc=%i\n",
812 np = of_find_node_by_path("/testcase-data/interrupts/interrupts1");
814 pr_err("missing testcase data\n");
818 for (i = 0; i < 4; i++) {
821 memset(&args, 0, sizeof(args));
822 rc = of_irq_parse_one(np, i, &args);
824 /* Test the values from tests-phandle.dtsi */
828 passed &= (args.args_count == 1);
829 passed &= (args.args[0] == 9);
833 passed &= (args.args_count == 3);
834 passed &= (args.args[0] == 10);
835 passed &= (args.args[1] == 11);
836 passed &= (args.args[2] == 12);
840 passed &= (args.args_count == 2);
841 passed &= (args.args[0] == 13);
842 passed &= (args.args[1] == 14);
846 passed &= (args.args_count == 2);
847 passed &= (args.args[0] == 15);
848 passed &= (args.args[1] == 16);
853 unittest(passed, "index %i - data error on node %pOF rc=%i\n",
859 static void __init of_unittest_parse_interrupts_extended(void)
861 struct device_node *np;
862 struct of_phandle_args args;
865 if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)
868 np = of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0");
870 pr_err("missing testcase data\n");
874 for (i = 0; i < 7; i++) {
877 memset(&args, 0, sizeof(args));
878 rc = of_irq_parse_one(np, i, &args);
880 /* Test the values from tests-phandle.dtsi */
884 passed &= (args.args_count == 1);
885 passed &= (args.args[0] == 1);
889 passed &= (args.args_count == 3);
890 passed &= (args.args[0] == 2);
891 passed &= (args.args[1] == 3);
892 passed &= (args.args[2] == 4);
896 passed &= (args.args_count == 2);
897 passed &= (args.args[0] == 5);
898 passed &= (args.args[1] == 6);
902 passed &= (args.args_count == 1);
903 passed &= (args.args[0] == 9);
907 passed &= (args.args_count == 3);
908 passed &= (args.args[0] == 10);
909 passed &= (args.args[1] == 11);
910 passed &= (args.args[2] == 12);
914 passed &= (args.args_count == 2);
915 passed &= (args.args[0] == 13);
916 passed &= (args.args[1] == 14);
920 passed &= (args.args_count == 1);
921 passed &= (args.args[0] == 15);
927 unittest(passed, "index %i - data error on node %pOF rc=%i\n",
933 static const struct of_device_id match_node_table[] = {
934 { .data = "A", .name = "name0", }, /* Name alone is lowest priority */
935 { .data = "B", .type = "type1", }, /* followed by type alone */
937 { .data = "Ca", .name = "name2", .type = "type1", }, /* followed by both together */
938 { .data = "Cb", .name = "name2", }, /* Only match when type doesn't match */
939 { .data = "Cc", .name = "name2", .type = "type2", },
941 { .data = "E", .compatible = "compat3" },
942 { .data = "G", .compatible = "compat2", },
943 { .data = "H", .compatible = "compat2", .name = "name5", },
944 { .data = "I", .compatible = "compat2", .type = "type1", },
945 { .data = "J", .compatible = "compat2", .type = "type1", .name = "name8", },
946 { .data = "K", .compatible = "compat2", .name = "name9", },
953 } match_node_tests[] = {
954 { .path = "/testcase-data/match-node/name0", .data = "A", },
955 { .path = "/testcase-data/match-node/name1", .data = "B", },
956 { .path = "/testcase-data/match-node/a/name2", .data = "Ca", },
957 { .path = "/testcase-data/match-node/b/name2", .data = "Cb", },
958 { .path = "/testcase-data/match-node/c/name2", .data = "Cc", },
959 { .path = "/testcase-data/match-node/name3", .data = "E", },
960 { .path = "/testcase-data/match-node/name4", .data = "G", },
961 { .path = "/testcase-data/match-node/name5", .data = "H", },
962 { .path = "/testcase-data/match-node/name6", .data = "G", },
963 { .path = "/testcase-data/match-node/name7", .data = "I", },
964 { .path = "/testcase-data/match-node/name8", .data = "J", },
965 { .path = "/testcase-data/match-node/name9", .data = "K", },
968 static void __init of_unittest_match_node(void)
970 struct device_node *np;
971 const struct of_device_id *match;
974 for (i = 0; i < ARRAY_SIZE(match_node_tests); i++) {
975 np = of_find_node_by_path(match_node_tests[i].path);
977 unittest(0, "missing testcase node %s\n",
978 match_node_tests[i].path);
982 match = of_match_node(match_node_table, np);
984 unittest(0, "%s didn't match anything\n",
985 match_node_tests[i].path);
989 if (strcmp(match->data, match_node_tests[i].data) != 0) {
990 unittest(0, "%s got wrong match. expected %s, got %s\n",
991 match_node_tests[i].path, match_node_tests[i].data,
992 (const char *)match->data);
995 unittest(1, "passed");
999 static struct resource test_bus_res = {
1000 .start = 0xfffffff8,
1002 .flags = IORESOURCE_MEM,
1004 static const struct platform_device_info test_bus_info = {
1005 .name = "unittest-bus",
1007 static void __init of_unittest_platform_populate(void)
1010 struct device_node *np, *child, *grandchild;
1011 struct platform_device *pdev, *test_bus;
1012 const struct of_device_id match[] = {
1013 { .compatible = "test-device", },
1017 np = of_find_node_by_path("/testcase-data");
1018 of_platform_default_populate(np, NULL, NULL);
1020 /* Test that a missing irq domain returns -EPROBE_DEFER */
1021 np = of_find_node_by_path("/testcase-data/testcase-device1");
1022 pdev = of_find_device_by_node(np);
1023 unittest(pdev, "device 1 creation failed\n");
1025 if (!(of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)) {
1026 irq = platform_get_irq(pdev, 0);
1027 unittest(irq == -EPROBE_DEFER,
1028 "device deferred probe failed - %d\n", irq);
1030 /* Test that a parsing failure does not return -EPROBE_DEFER */
1031 np = of_find_node_by_path("/testcase-data/testcase-device2");
1032 pdev = of_find_device_by_node(np);
1033 unittest(pdev, "device 2 creation failed\n");
1034 irq = platform_get_irq(pdev, 0);
1035 unittest(irq < 0 && irq != -EPROBE_DEFER,
1036 "device parsing error failed - %d\n", irq);
1039 np = of_find_node_by_path("/testcase-data/platform-tests");
1040 unittest(np, "No testcase data in device tree\n");
1044 test_bus = platform_device_register_full(&test_bus_info);
1045 rc = PTR_ERR_OR_ZERO(test_bus);
1046 unittest(!rc, "testbus registration failed; rc=%i\n", rc);
1051 test_bus->dev.of_node = np;
1054 * Add a dummy resource to the test bus node after it is
1055 * registered to catch problems with un-inserted resources. The
1056 * DT code doesn't insert the resources, and it has caused the
1057 * kernel to oops in the past. This makes sure the same bug
1058 * doesn't crop up again.
1060 platform_device_add_resources(test_bus, &test_bus_res, 1);
1062 of_platform_populate(np, match, NULL, &test_bus->dev);
1063 for_each_child_of_node(np, child) {
1064 for_each_child_of_node(child, grandchild)
1065 unittest(of_find_device_by_node(grandchild),
1066 "Could not create device for node '%pOFn'\n",
1070 of_platform_depopulate(&test_bus->dev);
1071 for_each_child_of_node(np, child) {
1072 for_each_child_of_node(child, grandchild)
1073 unittest(!of_find_device_by_node(grandchild),
1074 "device didn't get destroyed '%pOFn'\n",
1078 platform_device_unregister(test_bus);
1083 * update_node_properties - adds the properties
1084 * of np into dup node (present in live tree) and
1085 * updates parent of children of np to dup.
1087 * @np: node whose properties are being added to the live tree
1088 * @dup: node present in live tree to be updated
1090 static void update_node_properties(struct device_node *np,
1091 struct device_node *dup)
1093 struct property *prop;
1094 struct property *save_next;
1095 struct device_node *child;
1098 for_each_child_of_node(np, child)
1099 child->parent = dup;
1102 * "unittest internal error: unable to add testdata property"
1104 * If this message reports a property in node '/__symbols__' then
1105 * the respective unittest overlay contains a label that has the
1106 * same name as a label in the live devicetree. The label will
1107 * be in the live devicetree only if the devicetree source was
1108 * compiled with the '-@' option. If you encounter this error,
1109 * please consider renaming __all__ of the labels in the unittest
1110 * overlay dts files with an odd prefix that is unlikely to be
1111 * used in a real devicetree.
1115 * open code for_each_property_of_node() because of_add_property()
1116 * sets prop->next to NULL
1118 for (prop = np->properties; prop != NULL; prop = save_next) {
1119 save_next = prop->next;
1120 ret = of_add_property(dup, prop);
1122 if (ret == -EEXIST && !strcmp(prop->name, "name"))
1124 pr_err("unittest internal error: unable to add testdata property %pOF/%s",
1131 * attach_node_and_children - attaches nodes
1132 * and its children to live tree.
1133 * CAUTION: misleading function name - if node @np already exists in
1134 * the live tree then children of @np are *not* attached to the live
1135 * tree. This works for the current test devicetree nodes because such
1136 * nodes do not have child nodes.
1138 * @np: Node to attach to live tree
1140 static void attach_node_and_children(struct device_node *np)
1142 struct device_node *next, *dup, *child;
1143 unsigned long flags;
1144 const char *full_name;
1146 full_name = kasprintf(GFP_KERNEL, "%pOF", np);
1148 if (!strcmp(full_name, "/__local_fixups__") ||
1149 !strcmp(full_name, "/__fixups__"))
1152 dup = of_find_node_by_path(full_name);
1155 update_node_properties(np, dup);
1162 mutex_lock(&of_mutex);
1163 raw_spin_lock_irqsave(&devtree_lock, flags);
1164 np->sibling = np->parent->child;
1165 np->parent->child = np;
1166 of_node_clear_flag(np, OF_DETACHED);
1167 raw_spin_unlock_irqrestore(&devtree_lock, flags);
1169 __of_attach_node_sysfs(np);
1170 mutex_unlock(&of_mutex);
1173 next = child->sibling;
1174 attach_node_and_children(child);
1180 * unittest_data_add - Reads, copies data from
1181 * linked tree and attaches it to the live tree
1183 static int __init unittest_data_add(void)
1185 void *unittest_data;
1186 struct device_node *unittest_data_node, *np;
1188 * __dtb_testcases_begin[] and __dtb_testcases_end[] are magically
1189 * created by cmd_dt_S_dtb in scripts/Makefile.lib
1191 extern uint8_t __dtb_testcases_begin[];
1192 extern uint8_t __dtb_testcases_end[];
1193 const int size = __dtb_testcases_end - __dtb_testcases_begin;
1197 pr_warn("%s: No testcase data to attach; not running tests\n",
1203 unittest_data = kmemdup(__dtb_testcases_begin, size, GFP_KERNEL);
1207 of_fdt_unflatten_tree(unittest_data, NULL, &unittest_data_node);
1208 if (!unittest_data_node) {
1209 pr_warn("%s: No tree to attach; not running tests\n", __func__);
1210 kfree(unittest_data);
1215 * This lock normally encloses of_resolve_phandles()
1217 of_overlay_mutex_lock();
1219 rc = of_resolve_phandles(unittest_data_node);
1221 pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__, rc);
1222 of_overlay_mutex_unlock();
1227 of_root = unittest_data_node;
1228 for_each_of_allnodes(np)
1229 __of_attach_node_sysfs(np);
1230 of_aliases = of_find_node_by_path("/aliases");
1231 of_chosen = of_find_node_by_path("/chosen");
1232 of_overlay_mutex_unlock();
1236 /* attach the sub-tree to live tree */
1237 np = unittest_data_node->child;
1239 struct device_node *next = np->sibling;
1241 np->parent = of_root;
1242 attach_node_and_children(np);
1246 of_overlay_mutex_unlock();
1251 #ifdef CONFIG_OF_OVERLAY
1252 static int __init overlay_data_apply(const char *overlay_name, int *overlay_id);
1254 static int unittest_probe(struct platform_device *pdev)
1256 struct device *dev = &pdev->dev;
1257 struct device_node *np = dev->of_node;
1260 dev_err(dev, "No OF data for device\n");
1265 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
1267 of_platform_populate(np, NULL, NULL, &pdev->dev);
1272 static int unittest_remove(struct platform_device *pdev)
1274 struct device *dev = &pdev->dev;
1275 struct device_node *np = dev->of_node;
1277 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
1281 static const struct of_device_id unittest_match[] = {
1282 { .compatible = "unittest", },
1286 static struct platform_driver unittest_driver = {
1287 .probe = unittest_probe,
1288 .remove = unittest_remove,
1291 .of_match_table = of_match_ptr(unittest_match),
1295 /* get the platform device instantiated at the path */
1296 static struct platform_device *of_path_to_platform_device(const char *path)
1298 struct device_node *np;
1299 struct platform_device *pdev;
1301 np = of_find_node_by_path(path);
1305 pdev = of_find_device_by_node(np);
1311 /* find out if a platform device exists at that path */
1312 static int of_path_platform_device_exists(const char *path)
1314 struct platform_device *pdev;
1316 pdev = of_path_to_platform_device(path);
1317 platform_device_put(pdev);
1318 return pdev != NULL;
1321 #if IS_BUILTIN(CONFIG_I2C)
1323 /* get the i2c client device instantiated at the path */
1324 static struct i2c_client *of_path_to_i2c_client(const char *path)
1326 struct device_node *np;
1327 struct i2c_client *client;
1329 np = of_find_node_by_path(path);
1333 client = of_find_i2c_device_by_node(np);
1339 /* find out if a i2c client device exists at that path */
1340 static int of_path_i2c_client_exists(const char *path)
1342 struct i2c_client *client;
1344 client = of_path_to_i2c_client(path);
1346 put_device(&client->dev);
1347 return client != NULL;
1350 static int of_path_i2c_client_exists(const char *path)
1361 static int of_path_device_type_exists(const char *path,
1362 enum overlay_type ovtype)
1366 return of_path_platform_device_exists(path);
1368 return of_path_i2c_client_exists(path);
1373 static const char *unittest_path(int nr, enum overlay_type ovtype)
1376 static char buf[256];
1380 base = "/testcase-data/overlay-node/test-bus";
1383 base = "/testcase-data/overlay-node/test-bus/i2c-test-bus";
1389 snprintf(buf, sizeof(buf) - 1, "%s/test-unittest%d", base, nr);
1390 buf[sizeof(buf) - 1] = '\0';
1394 static int of_unittest_device_exists(int unittest_nr, enum overlay_type ovtype)
1398 path = unittest_path(unittest_nr, ovtype);
1402 return of_path_platform_device_exists(path);
1404 return of_path_i2c_client_exists(path);
1409 static const char *overlay_name_from_nr(int nr)
1411 static char buf[256];
1413 snprintf(buf, sizeof(buf) - 1,
1415 buf[sizeof(buf) - 1] = '\0';
1420 static const char *bus_path = "/testcase-data/overlay-node/test-bus";
1422 /* it is guaranteed that overlay ids are assigned in sequence */
1423 #define MAX_UNITTEST_OVERLAYS 256
1424 static unsigned long overlay_id_bits[BITS_TO_LONGS(MAX_UNITTEST_OVERLAYS)];
1425 static int overlay_first_id = -1;
1427 static void of_unittest_track_overlay(int id)
1429 if (overlay_first_id < 0)
1430 overlay_first_id = id;
1431 id -= overlay_first_id;
1433 /* we shouldn't need that many */
1434 BUG_ON(id >= MAX_UNITTEST_OVERLAYS);
1435 overlay_id_bits[BIT_WORD(id)] |= BIT_MASK(id);
1438 static void of_unittest_untrack_overlay(int id)
1440 if (overlay_first_id < 0)
1442 id -= overlay_first_id;
1443 BUG_ON(id >= MAX_UNITTEST_OVERLAYS);
1444 overlay_id_bits[BIT_WORD(id)] &= ~BIT_MASK(id);
1447 static void of_unittest_destroy_tracked_overlays(void)
1449 int id, ret, defers, ovcs_id;
1451 if (overlay_first_id < 0)
1454 /* try until no defers */
1457 /* remove in reverse order */
1458 for (id = MAX_UNITTEST_OVERLAYS - 1; id >= 0; id--) {
1459 if (!(overlay_id_bits[BIT_WORD(id)] & BIT_MASK(id)))
1462 ovcs_id = id + overlay_first_id;
1463 ret = of_overlay_remove(&ovcs_id);
1464 if (ret == -ENODEV) {
1465 pr_warn("%s: no overlay to destroy for #%d\n",
1466 __func__, id + overlay_first_id);
1471 pr_warn("%s: overlay destroy failed for #%d\n",
1472 __func__, id + overlay_first_id);
1476 overlay_id_bits[BIT_WORD(id)] &= ~BIT_MASK(id);
1478 } while (defers > 0);
1481 static int __init of_unittest_apply_overlay(int overlay_nr, int *overlay_id)
1483 const char *overlay_name;
1485 overlay_name = overlay_name_from_nr(overlay_nr);
1487 if (!overlay_data_apply(overlay_name, overlay_id)) {
1488 unittest(0, "could not apply overlay \"%s\"\n",
1492 of_unittest_track_overlay(*overlay_id);
1497 /* apply an overlay while checking before and after states */
1498 static int __init of_unittest_apply_overlay_check(int overlay_nr,
1499 int unittest_nr, int before, int after,
1500 enum overlay_type ovtype)
1504 /* unittest device must not be in before state */
1505 if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
1506 unittest(0, "%s with device @\"%s\" %s\n",
1507 overlay_name_from_nr(overlay_nr),
1508 unittest_path(unittest_nr, ovtype),
1509 !before ? "enabled" : "disabled");
1514 ret = of_unittest_apply_overlay(overlay_nr, &ovcs_id);
1516 /* of_unittest_apply_overlay already called unittest() */
1520 /* unittest device must be to set to after state */
1521 if (of_unittest_device_exists(unittest_nr, ovtype) != after) {
1522 unittest(0, "%s failed to create @\"%s\" %s\n",
1523 overlay_name_from_nr(overlay_nr),
1524 unittest_path(unittest_nr, ovtype),
1525 !after ? "enabled" : "disabled");
1532 /* apply an overlay and then revert it while checking before, after states */
1533 static int __init of_unittest_apply_revert_overlay_check(int overlay_nr,
1534 int unittest_nr, int before, int after,
1535 enum overlay_type ovtype)
1539 /* unittest device must be in before state */
1540 if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
1541 unittest(0, "%s with device @\"%s\" %s\n",
1542 overlay_name_from_nr(overlay_nr),
1543 unittest_path(unittest_nr, ovtype),
1544 !before ? "enabled" : "disabled");
1548 /* apply the overlay */
1550 ret = of_unittest_apply_overlay(overlay_nr, &ovcs_id);
1552 /* of_unittest_apply_overlay already called unittest() */
1556 /* unittest device must be in after state */
1557 if (of_unittest_device_exists(unittest_nr, ovtype) != after) {
1558 unittest(0, "%s failed to create @\"%s\" %s\n",
1559 overlay_name_from_nr(overlay_nr),
1560 unittest_path(unittest_nr, ovtype),
1561 !after ? "enabled" : "disabled");
1565 ret = of_overlay_remove(&ovcs_id);
1567 unittest(0, "%s failed to be destroyed @\"%s\"\n",
1568 overlay_name_from_nr(overlay_nr),
1569 unittest_path(unittest_nr, ovtype));
1573 /* unittest device must be again in before state */
1574 if (of_unittest_device_exists(unittest_nr, PDEV_OVERLAY) != before) {
1575 unittest(0, "%s with device @\"%s\" %s\n",
1576 overlay_name_from_nr(overlay_nr),
1577 unittest_path(unittest_nr, ovtype),
1578 !before ? "enabled" : "disabled");
1585 /* test activation of device */
1586 static void __init of_unittest_overlay_0(void)
1588 /* device should enable */
1589 if (of_unittest_apply_overlay_check(0, 0, 0, 1, PDEV_OVERLAY))
1592 unittest(1, "overlay test %d passed\n", 0);
1595 /* test deactivation of device */
1596 static void __init of_unittest_overlay_1(void)
1598 /* device should disable */
1599 if (of_unittest_apply_overlay_check(1, 1, 1, 0, PDEV_OVERLAY))
1602 unittest(1, "overlay test %d passed\n", 1);
1605 /* test activation of device */
1606 static void __init of_unittest_overlay_2(void)
1608 /* device should enable */
1609 if (of_unittest_apply_overlay_check(2, 2, 0, 1, PDEV_OVERLAY))
1612 unittest(1, "overlay test %d passed\n", 2);
1615 /* test deactivation of device */
1616 static void __init of_unittest_overlay_3(void)
1618 /* device should disable */
1619 if (of_unittest_apply_overlay_check(3, 3, 1, 0, PDEV_OVERLAY))
1622 unittest(1, "overlay test %d passed\n", 3);
1625 /* test activation of a full device node */
1626 static void __init of_unittest_overlay_4(void)
1628 /* device should disable */
1629 if (of_unittest_apply_overlay_check(4, 4, 0, 1, PDEV_OVERLAY))
1632 unittest(1, "overlay test %d passed\n", 4);
1635 /* test overlay apply/revert sequence */
1636 static void __init of_unittest_overlay_5(void)
1638 /* device should disable */
1639 if (of_unittest_apply_revert_overlay_check(5, 5, 0, 1, PDEV_OVERLAY))
1642 unittest(1, "overlay test %d passed\n", 5);
1645 /* test overlay application in sequence */
1646 static void __init of_unittest_overlay_6(void)
1648 int i, ov_id[2], ovcs_id;
1649 int overlay_nr = 6, unittest_nr = 6;
1650 int before = 0, after = 1;
1651 const char *overlay_name;
1653 /* unittest device must be in before state */
1654 for (i = 0; i < 2; i++) {
1655 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
1657 unittest(0, "%s with device @\"%s\" %s\n",
1658 overlay_name_from_nr(overlay_nr + i),
1659 unittest_path(unittest_nr + i,
1661 !before ? "enabled" : "disabled");
1666 /* apply the overlays */
1667 for (i = 0; i < 2; i++) {
1669 overlay_name = overlay_name_from_nr(overlay_nr + i);
1671 if (!overlay_data_apply(overlay_name, &ovcs_id)) {
1672 unittest(0, "could not apply overlay \"%s\"\n",
1677 of_unittest_track_overlay(ov_id[i]);
1680 for (i = 0; i < 2; i++) {
1681 /* unittest device must be in after state */
1682 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
1684 unittest(0, "overlay @\"%s\" failed @\"%s\" %s\n",
1685 overlay_name_from_nr(overlay_nr + i),
1686 unittest_path(unittest_nr + i,
1688 !after ? "enabled" : "disabled");
1693 for (i = 1; i >= 0; i--) {
1695 if (of_overlay_remove(&ovcs_id)) {
1696 unittest(0, "%s failed destroy @\"%s\"\n",
1697 overlay_name_from_nr(overlay_nr + i),
1698 unittest_path(unittest_nr + i,
1702 of_unittest_untrack_overlay(ov_id[i]);
1705 for (i = 0; i < 2; i++) {
1706 /* unittest device must be again in before state */
1707 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
1709 unittest(0, "%s with device @\"%s\" %s\n",
1710 overlay_name_from_nr(overlay_nr + i),
1711 unittest_path(unittest_nr + i,
1713 !before ? "enabled" : "disabled");
1718 unittest(1, "overlay test %d passed\n", 6);
1721 /* test overlay application in sequence */
1722 static void __init of_unittest_overlay_8(void)
1724 int i, ov_id[2], ovcs_id;
1725 int overlay_nr = 8, unittest_nr = 8;
1726 const char *overlay_name;
1728 /* we don't care about device state in this test */
1730 /* apply the overlays */
1731 for (i = 0; i < 2; i++) {
1733 overlay_name = overlay_name_from_nr(overlay_nr + i);
1735 if (!overlay_data_apply(overlay_name, &ovcs_id)) {
1736 unittest(0, "could not apply overlay \"%s\"\n",
1741 of_unittest_track_overlay(ov_id[i]);
1744 /* now try to remove first overlay (it should fail) */
1746 if (!of_overlay_remove(&ovcs_id)) {
1747 unittest(0, "%s was destroyed @\"%s\"\n",
1748 overlay_name_from_nr(overlay_nr + 0),
1749 unittest_path(unittest_nr,
1754 /* removing them in order should work */
1755 for (i = 1; i >= 0; i--) {
1757 if (of_overlay_remove(&ovcs_id)) {
1758 unittest(0, "%s not destroyed @\"%s\"\n",
1759 overlay_name_from_nr(overlay_nr + i),
1760 unittest_path(unittest_nr,
1764 of_unittest_untrack_overlay(ov_id[i]);
1767 unittest(1, "overlay test %d passed\n", 8);
1770 /* test insertion of a bus with parent devices */
1771 static void __init of_unittest_overlay_10(void)
1776 /* device should disable */
1777 ret = of_unittest_apply_overlay_check(10, 10, 0, 1, PDEV_OVERLAY);
1778 if (unittest(ret == 0,
1779 "overlay test %d failed; overlay application\n", 10))
1782 child_path = kasprintf(GFP_KERNEL, "%s/test-unittest101",
1783 unittest_path(10, PDEV_OVERLAY));
1784 if (unittest(child_path, "overlay test %d failed; kasprintf\n", 10))
1787 ret = of_path_device_type_exists(child_path, PDEV_OVERLAY);
1790 unittest(ret, "overlay test %d failed; no child device\n", 10);
1793 /* test insertion of a bus with parent devices (and revert) */
1794 static void __init of_unittest_overlay_11(void)
1798 /* device should disable */
1799 ret = of_unittest_apply_revert_overlay_check(11, 11, 0, 1,
1801 unittest(ret == 0, "overlay test %d failed; overlay apply\n", 11);
1804 #if IS_BUILTIN(CONFIG_I2C) && IS_ENABLED(CONFIG_OF_OVERLAY)
1806 struct unittest_i2c_bus_data {
1807 struct platform_device *pdev;
1808 struct i2c_adapter adap;
1811 static int unittest_i2c_master_xfer(struct i2c_adapter *adap,
1812 struct i2c_msg *msgs, int num)
1814 struct unittest_i2c_bus_data *std = i2c_get_adapdata(adap);
1821 static u32 unittest_i2c_functionality(struct i2c_adapter *adap)
1823 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
1826 static const struct i2c_algorithm unittest_i2c_algo = {
1827 .master_xfer = unittest_i2c_master_xfer,
1828 .functionality = unittest_i2c_functionality,
1831 static int unittest_i2c_bus_probe(struct platform_device *pdev)
1833 struct device *dev = &pdev->dev;
1834 struct device_node *np = dev->of_node;
1835 struct unittest_i2c_bus_data *std;
1836 struct i2c_adapter *adap;
1840 dev_err(dev, "No OF data for device\n");
1845 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
1847 std = devm_kzalloc(dev, sizeof(*std), GFP_KERNEL);
1851 /* link them together */
1853 platform_set_drvdata(pdev, std);
1856 i2c_set_adapdata(adap, std);
1858 strlcpy(adap->name, pdev->name, sizeof(adap->name));
1859 adap->class = I2C_CLASS_DEPRECATED;
1860 adap->algo = &unittest_i2c_algo;
1861 adap->dev.parent = dev;
1862 adap->dev.of_node = dev->of_node;
1863 adap->timeout = 5 * HZ;
1866 ret = i2c_add_numbered_adapter(adap);
1868 dev_err(dev, "Failed to add I2C adapter\n");
1875 static int unittest_i2c_bus_remove(struct platform_device *pdev)
1877 struct device *dev = &pdev->dev;
1878 struct device_node *np = dev->of_node;
1879 struct unittest_i2c_bus_data *std = platform_get_drvdata(pdev);
1881 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
1882 i2c_del_adapter(&std->adap);
1887 static const struct of_device_id unittest_i2c_bus_match[] = {
1888 { .compatible = "unittest-i2c-bus", },
1892 static struct platform_driver unittest_i2c_bus_driver = {
1893 .probe = unittest_i2c_bus_probe,
1894 .remove = unittest_i2c_bus_remove,
1896 .name = "unittest-i2c-bus",
1897 .of_match_table = of_match_ptr(unittest_i2c_bus_match),
1901 static int unittest_i2c_dev_probe(struct i2c_client *client,
1902 const struct i2c_device_id *id)
1904 struct device *dev = &client->dev;
1905 struct device_node *np = client->dev.of_node;
1908 dev_err(dev, "No OF node\n");
1912 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
1917 static int unittest_i2c_dev_remove(struct i2c_client *client)
1919 struct device *dev = &client->dev;
1920 struct device_node *np = client->dev.of_node;
1922 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
1926 static const struct i2c_device_id unittest_i2c_dev_id[] = {
1927 { .name = "unittest-i2c-dev" },
1931 static struct i2c_driver unittest_i2c_dev_driver = {
1933 .name = "unittest-i2c-dev",
1935 .probe = unittest_i2c_dev_probe,
1936 .remove = unittest_i2c_dev_remove,
1937 .id_table = unittest_i2c_dev_id,
1940 #if IS_BUILTIN(CONFIG_I2C_MUX)
1942 static int unittest_i2c_mux_select_chan(struct i2c_mux_core *muxc, u32 chan)
1947 static int unittest_i2c_mux_probe(struct i2c_client *client,
1948 const struct i2c_device_id *id)
1951 struct device *dev = &client->dev;
1952 struct i2c_adapter *adap = client->adapter;
1953 struct device_node *np = client->dev.of_node, *child;
1954 struct i2c_mux_core *muxc;
1957 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
1960 dev_err(dev, "No OF node\n");
1965 for_each_child_of_node(np, child) {
1966 if (of_property_read_u32(child, "reg", ®))
1968 if (max_reg == (u32)-1 || reg > max_reg)
1971 nchans = max_reg == (u32)-1 ? 0 : max_reg + 1;
1973 dev_err(dev, "No channels\n");
1977 muxc = i2c_mux_alloc(adap, dev, nchans, 0, 0,
1978 unittest_i2c_mux_select_chan, NULL);
1981 for (i = 0; i < nchans; i++) {
1982 if (i2c_mux_add_adapter(muxc, 0, i, 0)) {
1983 dev_err(dev, "Failed to register mux #%d\n", i);
1984 i2c_mux_del_adapters(muxc);
1989 i2c_set_clientdata(client, muxc);
1994 static int unittest_i2c_mux_remove(struct i2c_client *client)
1996 struct device *dev = &client->dev;
1997 struct device_node *np = client->dev.of_node;
1998 struct i2c_mux_core *muxc = i2c_get_clientdata(client);
2000 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
2001 i2c_mux_del_adapters(muxc);
2005 static const struct i2c_device_id unittest_i2c_mux_id[] = {
2006 { .name = "unittest-i2c-mux" },
2010 static struct i2c_driver unittest_i2c_mux_driver = {
2012 .name = "unittest-i2c-mux",
2014 .probe = unittest_i2c_mux_probe,
2015 .remove = unittest_i2c_mux_remove,
2016 .id_table = unittest_i2c_mux_id,
2021 static int of_unittest_overlay_i2c_init(void)
2025 ret = i2c_add_driver(&unittest_i2c_dev_driver);
2026 if (unittest(ret == 0,
2027 "could not register unittest i2c device driver\n"))
2030 ret = platform_driver_register(&unittest_i2c_bus_driver);
2031 if (unittest(ret == 0,
2032 "could not register unittest i2c bus driver\n"))
2035 #if IS_BUILTIN(CONFIG_I2C_MUX)
2036 ret = i2c_add_driver(&unittest_i2c_mux_driver);
2037 if (unittest(ret == 0,
2038 "could not register unittest i2c mux driver\n"))
2045 static void of_unittest_overlay_i2c_cleanup(void)
2047 #if IS_BUILTIN(CONFIG_I2C_MUX)
2048 i2c_del_driver(&unittest_i2c_mux_driver);
2050 platform_driver_unregister(&unittest_i2c_bus_driver);
2051 i2c_del_driver(&unittest_i2c_dev_driver);
2054 static void __init of_unittest_overlay_i2c_12(void)
2056 /* device should enable */
2057 if (of_unittest_apply_overlay_check(12, 12, 0, 1, I2C_OVERLAY))
2060 unittest(1, "overlay test %d passed\n", 12);
2063 /* test deactivation of device */
2064 static void __init of_unittest_overlay_i2c_13(void)
2066 /* device should disable */
2067 if (of_unittest_apply_overlay_check(13, 13, 1, 0, I2C_OVERLAY))
2070 unittest(1, "overlay test %d passed\n", 13);
2073 /* just check for i2c mux existence */
2074 static void of_unittest_overlay_i2c_14(void)
2078 static void __init of_unittest_overlay_i2c_15(void)
2080 /* device should enable */
2081 if (of_unittest_apply_overlay_check(15, 15, 0, 1, I2C_OVERLAY))
2084 unittest(1, "overlay test %d passed\n", 15);
2089 static inline void of_unittest_overlay_i2c_14(void) { }
2090 static inline void of_unittest_overlay_i2c_15(void) { }
2094 static void __init of_unittest_overlay(void)
2096 struct device_node *bus_np = NULL;
2098 if (platform_driver_register(&unittest_driver)) {
2099 unittest(0, "could not register unittest driver\n");
2103 bus_np = of_find_node_by_path(bus_path);
2104 if (bus_np == NULL) {
2105 unittest(0, "could not find bus_path \"%s\"\n", bus_path);
2109 if (of_platform_default_populate(bus_np, NULL, NULL)) {
2110 unittest(0, "could not populate bus @ \"%s\"\n", bus_path);
2114 if (!of_unittest_device_exists(100, PDEV_OVERLAY)) {
2115 unittest(0, "could not find unittest0 @ \"%s\"\n",
2116 unittest_path(100, PDEV_OVERLAY));
2120 if (of_unittest_device_exists(101, PDEV_OVERLAY)) {
2121 unittest(0, "unittest1 @ \"%s\" should not exist\n",
2122 unittest_path(101, PDEV_OVERLAY));
2126 unittest(1, "basic infrastructure of overlays passed");
2128 /* tests in sequence */
2129 of_unittest_overlay_0();
2130 of_unittest_overlay_1();
2131 of_unittest_overlay_2();
2132 of_unittest_overlay_3();
2133 of_unittest_overlay_4();
2134 of_unittest_overlay_5();
2135 of_unittest_overlay_6();
2136 of_unittest_overlay_8();
2138 of_unittest_overlay_10();
2139 of_unittest_overlay_11();
2141 #if IS_BUILTIN(CONFIG_I2C)
2142 if (unittest(of_unittest_overlay_i2c_init() == 0, "i2c init failed\n"))
2145 of_unittest_overlay_i2c_12();
2146 of_unittest_overlay_i2c_13();
2147 of_unittest_overlay_i2c_14();
2148 of_unittest_overlay_i2c_15();
2150 of_unittest_overlay_i2c_cleanup();
2153 of_unittest_destroy_tracked_overlays();
2156 of_node_put(bus_np);
2160 static inline void __init of_unittest_overlay(void) { }
2163 #ifdef CONFIG_OF_OVERLAY
2166 * __dtb_ot_begin[] and __dtb_ot_end[] are created by cmd_dt_S_dtb
2167 * in scripts/Makefile.lib
2170 #define OVERLAY_INFO_EXTERN(name) \
2171 extern uint8_t __dtb_##name##_begin[]; \
2172 extern uint8_t __dtb_##name##_end[]
2174 #define OVERLAY_INFO(overlay_name, expected) \
2175 { .dtb_begin = __dtb_##overlay_name##_begin, \
2176 .dtb_end = __dtb_##overlay_name##_end, \
2177 .expected_result = expected, \
2178 .name = #overlay_name, \
2181 struct overlay_info {
2184 int expected_result;
2189 OVERLAY_INFO_EXTERN(overlay_base);
2190 OVERLAY_INFO_EXTERN(overlay);
2191 OVERLAY_INFO_EXTERN(overlay_0);
2192 OVERLAY_INFO_EXTERN(overlay_1);
2193 OVERLAY_INFO_EXTERN(overlay_2);
2194 OVERLAY_INFO_EXTERN(overlay_3);
2195 OVERLAY_INFO_EXTERN(overlay_4);
2196 OVERLAY_INFO_EXTERN(overlay_5);
2197 OVERLAY_INFO_EXTERN(overlay_6);
2198 OVERLAY_INFO_EXTERN(overlay_7);
2199 OVERLAY_INFO_EXTERN(overlay_8);
2200 OVERLAY_INFO_EXTERN(overlay_9);
2201 OVERLAY_INFO_EXTERN(overlay_10);
2202 OVERLAY_INFO_EXTERN(overlay_11);
2203 OVERLAY_INFO_EXTERN(overlay_12);
2204 OVERLAY_INFO_EXTERN(overlay_13);
2205 OVERLAY_INFO_EXTERN(overlay_15);
2206 OVERLAY_INFO_EXTERN(overlay_bad_add_dup_node);
2207 OVERLAY_INFO_EXTERN(overlay_bad_add_dup_prop);
2208 OVERLAY_INFO_EXTERN(overlay_bad_phandle);
2209 OVERLAY_INFO_EXTERN(overlay_bad_symbol);
2211 /* entries found by name */
2212 static struct overlay_info overlays[] = {
2213 OVERLAY_INFO(overlay_base, -9999),
2214 OVERLAY_INFO(overlay, 0),
2215 OVERLAY_INFO(overlay_0, 0),
2216 OVERLAY_INFO(overlay_1, 0),
2217 OVERLAY_INFO(overlay_2, 0),
2218 OVERLAY_INFO(overlay_3, 0),
2219 OVERLAY_INFO(overlay_4, 0),
2220 OVERLAY_INFO(overlay_5, 0),
2221 OVERLAY_INFO(overlay_6, 0),
2222 OVERLAY_INFO(overlay_7, 0),
2223 OVERLAY_INFO(overlay_8, 0),
2224 OVERLAY_INFO(overlay_9, 0),
2225 OVERLAY_INFO(overlay_10, 0),
2226 OVERLAY_INFO(overlay_11, 0),
2227 OVERLAY_INFO(overlay_12, 0),
2228 OVERLAY_INFO(overlay_13, 0),
2229 OVERLAY_INFO(overlay_15, 0),
2230 OVERLAY_INFO(overlay_bad_add_dup_node, -EINVAL),
2231 OVERLAY_INFO(overlay_bad_add_dup_prop, -EINVAL),
2232 OVERLAY_INFO(overlay_bad_phandle, -EINVAL),
2233 OVERLAY_INFO(overlay_bad_symbol, -EINVAL),
2235 {.dtb_begin = NULL, .dtb_end = NULL, .expected_result = 0, .name = NULL}
2238 static struct device_node *overlay_base_root;
2240 static void * __init dt_alloc_memory(u64 size, u64 align)
2242 void *ptr = memblock_alloc(size, align);
2245 panic("%s: Failed to allocate %llu bytes align=0x%llx\n",
2246 __func__, size, align);
2252 * Create base device tree for the overlay unittest.
2254 * This is called from very early boot code.
2256 * Do as much as possible the same way as done in __unflatten_device_tree
2257 * and other early boot steps for the normal FDT so that the overlay base
2258 * unflattened tree will have the same characteristics as the real tree
2259 * (such as having memory allocated by the early allocator). The goal
2260 * is to test "the real thing" as much as possible, and test "test setup
2261 * code" as little as possible.
2263 * Have to stop before resolving phandles, because that uses kmalloc.
2265 void __init unittest_unflatten_overlay_base(void)
2267 struct overlay_info *info;
2272 const char *overlay_name = "overlay_base";
2274 for (info = overlays; info && info->name; info++) {
2275 if (!strcmp(overlay_name, info->name)) {
2281 pr_err("no overlay data for %s\n", overlay_name);
2285 info = &overlays[0];
2287 if (info->expected_result != -9999) {
2288 pr_err("No dtb 'overlay_base' to attach\n");
2292 data_size = info->dtb_end - info->dtb_begin;
2294 pr_err("No dtb 'overlay_base' to attach\n");
2298 size = fdt_totalsize(info->dtb_begin);
2299 if (size != data_size) {
2300 pr_err("dtb 'overlay_base' header totalsize != actual size");
2304 new_fdt = dt_alloc_memory(size, roundup_pow_of_two(FDT_V17_SIZE));
2306 pr_err("alloc for dtb 'overlay_base' failed");
2310 memcpy(new_fdt, info->dtb_begin, size);
2312 __unflatten_device_tree(new_fdt, NULL, &overlay_base_root,
2313 dt_alloc_memory, true);
2317 * The purpose of of_unittest_overlay_data_add is to add an
2318 * overlay in the normal fashion. This is a test of the whole
2319 * picture, instead of testing individual elements.
2321 * A secondary purpose is to be able to verify that the contents of
2322 * /proc/device-tree/ contains the updated structure and values from
2323 * the overlay. That must be verified separately in user space.
2325 * Return 0 on unexpected error.
2327 static int __init overlay_data_apply(const char *overlay_name, int *overlay_id)
2329 struct overlay_info *info;
2334 for (info = overlays; info && info->name; info++) {
2335 if (!strcmp(overlay_name, info->name)) {
2341 pr_err("no overlay data for %s\n", overlay_name);
2345 size = info->dtb_end - info->dtb_begin;
2347 pr_err("no overlay data for %s\n", overlay_name);
2349 ret = of_overlay_fdt_apply(info->dtb_begin, size, &info->overlay_id);
2351 *overlay_id = info->overlay_id;
2355 pr_debug("%s applied\n", overlay_name);
2358 if (ret != info->expected_result)
2359 pr_err("of_overlay_fdt_apply() expected %d, ret=%d, %s\n",
2360 info->expected_result, ret, overlay_name);
2362 return (ret == info->expected_result);
2366 * The purpose of of_unittest_overlay_high_level is to add an overlay
2367 * in the normal fashion. This is a test of the whole picture,
2368 * instead of individual elements.
2370 * The first part of the function is _not_ normal overlay usage; it is
2371 * finishing splicing the base overlay device tree into the live tree.
2373 static __init void of_unittest_overlay_high_level(void)
2375 struct device_node *last_sibling;
2376 struct device_node *np;
2377 struct device_node *of_symbols;
2378 struct device_node *overlay_base_symbols;
2379 struct device_node **pprev;
2380 struct property *prop;
2382 if (!overlay_base_root) {
2383 unittest(0, "overlay_base_root not initialized\n");
2388 * Could not fixup phandles in unittest_unflatten_overlay_base()
2389 * because kmalloc() was not yet available.
2391 of_overlay_mutex_lock();
2392 of_resolve_phandles(overlay_base_root);
2393 of_overlay_mutex_unlock();
2397 * do not allow overlay_base to duplicate any node already in
2398 * tree, this greatly simplifies the code
2402 * remove overlay_base_root node "__local_fixups", after
2403 * being used by of_resolve_phandles()
2405 pprev = &overlay_base_root->child;
2406 for (np = overlay_base_root->child; np; np = np->sibling) {
2407 if (of_node_name_eq(np, "__local_fixups__")) {
2408 *pprev = np->sibling;
2411 pprev = &np->sibling;
2414 /* remove overlay_base_root node "__symbols__" if in live tree */
2415 of_symbols = of_get_child_by_name(of_root, "__symbols__");
2417 /* will have to graft properties from node into live tree */
2418 pprev = &overlay_base_root->child;
2419 for (np = overlay_base_root->child; np; np = np->sibling) {
2420 if (of_node_name_eq(np, "__symbols__")) {
2421 overlay_base_symbols = np;
2422 *pprev = np->sibling;
2425 pprev = &np->sibling;
2429 for_each_child_of_node(overlay_base_root, np) {
2430 struct device_node *base_child;
2431 for_each_child_of_node(of_root, base_child) {
2432 if (!strcmp(np->full_name, base_child->full_name)) {
2433 unittest(0, "illegal node name in overlay_base %pOFn",
2441 * overlay 'overlay_base' is not allowed to have root
2442 * properties, so only need to splice nodes into main device tree.
2444 * root node of *overlay_base_root will not be freed, it is lost
2448 for (np = overlay_base_root->child; np; np = np->sibling)
2449 np->parent = of_root;
2451 mutex_lock(&of_mutex);
2453 for (last_sibling = np = of_root->child; np; np = np->sibling)
2457 last_sibling->sibling = overlay_base_root->child;
2459 of_root->child = overlay_base_root->child;
2461 for_each_of_allnodes_from(overlay_base_root, np)
2462 __of_attach_node_sysfs(np);
2465 struct property *new_prop;
2466 for_each_property_of_node(overlay_base_symbols, prop) {
2468 new_prop = __of_prop_dup(prop, GFP_KERNEL);
2470 unittest(0, "__of_prop_dup() of '%s' from overlay_base node __symbols__",
2474 if (__of_add_property(of_symbols, new_prop)) {
2475 /* "name" auto-generated by unflatten */
2476 if (!strcmp(new_prop->name, "name"))
2478 unittest(0, "duplicate property '%s' in overlay_base node __symbols__",
2482 if (__of_add_property_sysfs(of_symbols, new_prop)) {
2483 unittest(0, "unable to add property '%s' in overlay_base node __symbols__ to sysfs",
2490 mutex_unlock(&of_mutex);
2493 /* now do the normal overlay usage test */
2495 unittest(overlay_data_apply("overlay", NULL),
2496 "Adding overlay 'overlay' failed\n");
2498 unittest(overlay_data_apply("overlay_bad_add_dup_node", NULL),
2499 "Adding overlay 'overlay_bad_add_dup_node' failed\n");
2501 unittest(overlay_data_apply("overlay_bad_add_dup_prop", NULL),
2502 "Adding overlay 'overlay_bad_add_dup_prop' failed\n");
2504 unittest(overlay_data_apply("overlay_bad_phandle", NULL),
2505 "Adding overlay 'overlay_bad_phandle' failed\n");
2507 unittest(overlay_data_apply("overlay_bad_symbol", NULL),
2508 "Adding overlay 'overlay_bad_symbol' failed\n");
2513 mutex_unlock(&of_mutex);
2518 static inline __init void of_unittest_overlay_high_level(void) {}
2522 static int __init of_unittest(void)
2524 struct device_node *np;
2527 /* adding data for unittest */
2529 if (IS_ENABLED(CONFIG_UML))
2530 unittest_unflatten_overlay_base();
2532 res = unittest_data_add();
2536 of_aliases = of_find_node_by_path("/aliases");
2538 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
2540 pr_info("No testcase data in device tree; not running tests\n");
2545 pr_info("start of unittest - you will see error messages\n");
2546 of_unittest_check_tree_linkage();
2547 of_unittest_check_phandles();
2548 of_unittest_find_node_by_name();
2549 of_unittest_dynamic();
2550 of_unittest_parse_phandle_with_args();
2551 of_unittest_parse_phandle_with_args_map();
2552 of_unittest_printf();
2553 of_unittest_property_string();
2554 of_unittest_property_copy();
2555 of_unittest_changeset();
2556 of_unittest_parse_interrupts();
2557 of_unittest_parse_interrupts_extended();
2558 of_unittest_match_node();
2559 of_unittest_platform_populate();
2560 of_unittest_overlay();
2562 /* Double check linkage after removing testcase data */
2563 of_unittest_check_tree_linkage();
2565 of_unittest_overlay_high_level();
2567 pr_info("end of unittest - %i passed, %i failed\n",
2568 unittest_results.passed, unittest_results.failed);
2572 late_initcall(of_unittest);