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/dma-direct.h> /* to test phys_to_dma/dma_to_phys */
11 #include <linux/err.h>
12 #include <linux/errno.h>
13 #include <linux/hashtable.h>
14 #include <linux/libfdt.h>
16 #include <linux/of_address.h>
17 #include <linux/of_fdt.h>
18 #include <linux/of_irq.h>
19 #include <linux/of_platform.h>
20 #include <linux/list.h>
21 #include <linux/mutex.h>
22 #include <linux/slab.h>
23 #include <linux/device.h>
24 #include <linux/platform_device.h>
25 #include <linux/kernel.h>
27 #include <linux/i2c.h>
28 #include <linux/i2c-mux.h>
29 #include <linux/gpio/driver.h>
31 #include <linux/bitops.h>
33 #include "of_private.h"
35 static struct unittest_results {
40 #define unittest(result, fmt, ...) ({ \
41 bool failed = !(result); \
43 unittest_results.failed++; \
44 pr_err("FAIL %s():%i " fmt, __func__, __LINE__, ##__VA_ARGS__); \
46 unittest_results.passed++; \
47 pr_info("pass %s():%i\n", __func__, __LINE__); \
53 * Expected message may have a message level other than KERN_INFO.
54 * Print the expected message only if the current loglevel will allow
55 * the actual message to print.
57 * Do not use EXPECT_BEGIN() or EXPECT_END() for messages generated by
60 #define EXPECT_BEGIN(level, fmt, ...) \
61 printk(level pr_fmt("EXPECT \\ : ") fmt, ##__VA_ARGS__)
63 #define EXPECT_END(level, fmt, ...) \
64 printk(level pr_fmt("EXPECT / : ") fmt, ##__VA_ARGS__)
66 static void __init of_unittest_find_node_by_name(void)
68 struct device_node *np;
69 const char *options, *name;
71 np = of_find_node_by_path("/testcase-data");
72 name = kasprintf(GFP_KERNEL, "%pOF", np);
73 unittest(np && !strcmp("/testcase-data", name),
74 "find /testcase-data failed\n");
78 /* Test if trailing '/' works */
79 np = of_find_node_by_path("/testcase-data/");
80 unittest(!np, "trailing '/' on /testcase-data/ should fail\n");
82 np = of_find_node_by_path("/testcase-data/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-data/phandle-tests/consumer-a failed\n");
89 np = of_find_node_by_path("testcase-alias");
90 name = kasprintf(GFP_KERNEL, "%pOF", np);
91 unittest(np && !strcmp("/testcase-data", name),
92 "find testcase-alias failed\n");
96 /* Test if trailing '/' works on aliases */
97 np = of_find_node_by_path("testcase-alias/");
98 unittest(!np, "trailing '/' on testcase-alias/ should fail\n");
100 np = of_find_node_by_path("testcase-alias/phandle-tests/consumer-a");
101 name = kasprintf(GFP_KERNEL, "%pOF", np);
102 unittest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", name),
103 "find testcase-alias/phandle-tests/consumer-a failed\n");
107 np = of_find_node_by_path("/testcase-data/missing-path");
108 unittest(!np, "non-existent path returned node %pOF\n", np);
111 np = of_find_node_by_path("missing-alias");
112 unittest(!np, "non-existent alias returned node %pOF\n", np);
115 np = of_find_node_by_path("testcase-alias/missing-path");
116 unittest(!np, "non-existent alias with relative path returned node %pOF\n", np);
119 np = of_find_node_opts_by_path("/testcase-data:testoption", &options);
120 unittest(np && !strcmp("testoption", options),
121 "option path test failed\n");
124 np = of_find_node_opts_by_path("/testcase-data:test/option", &options);
125 unittest(np && !strcmp("test/option", options),
126 "option path test, subcase #1 failed\n");
129 np = of_find_node_opts_by_path("/testcase-data/testcase-device1:test/option", &options);
130 unittest(np && !strcmp("test/option", options),
131 "option path test, subcase #2 failed\n");
134 np = of_find_node_opts_by_path("/testcase-data:testoption", NULL);
135 unittest(np, "NULL option path test failed\n");
138 np = of_find_node_opts_by_path("testcase-alias:testaliasoption",
140 unittest(np && !strcmp("testaliasoption", options),
141 "option alias path test failed\n");
144 np = of_find_node_opts_by_path("testcase-alias:test/alias/option",
146 unittest(np && !strcmp("test/alias/option", options),
147 "option alias path test, subcase #1 failed\n");
150 np = of_find_node_opts_by_path("testcase-alias:testaliasoption", NULL);
151 unittest(np, "NULL option alias path test failed\n");
154 options = "testoption";
155 np = of_find_node_opts_by_path("testcase-alias", &options);
156 unittest(np && !options, "option clearing test failed\n");
159 options = "testoption";
160 np = of_find_node_opts_by_path("/", &options);
161 unittest(np && !options, "option clearing root node test failed\n");
165 static void __init of_unittest_dynamic(void)
167 struct device_node *np;
168 struct property *prop;
170 np = of_find_node_by_path("/testcase-data");
172 pr_err("missing testcase data\n");
176 /* Array of 4 properties for the purpose of testing */
177 prop = kcalloc(4, sizeof(*prop), GFP_KERNEL);
179 unittest(0, "kzalloc() failed\n");
183 /* Add a new property - should pass*/
184 prop->name = "new-property";
185 prop->value = "new-property-data";
186 prop->length = strlen(prop->value) + 1;
187 unittest(of_add_property(np, prop) == 0, "Adding a new property failed\n");
189 /* Try to add an existing property - should fail */
191 prop->name = "new-property";
192 prop->value = "new-property-data-should-fail";
193 prop->length = strlen(prop->value) + 1;
194 unittest(of_add_property(np, prop) != 0,
195 "Adding an existing property should have failed\n");
197 /* Try to modify an existing property - should pass */
198 prop->value = "modify-property-data-should-pass";
199 prop->length = strlen(prop->value) + 1;
200 unittest(of_update_property(np, prop) == 0,
201 "Updating an existing property should have passed\n");
203 /* Try to modify non-existent property - should pass*/
205 prop->name = "modify-property";
206 prop->value = "modify-missing-property-data-should-pass";
207 prop->length = strlen(prop->value) + 1;
208 unittest(of_update_property(np, prop) == 0,
209 "Updating a missing property should have passed\n");
211 /* Remove property - should pass */
212 unittest(of_remove_property(np, prop) == 0,
213 "Removing a property should have passed\n");
215 /* Adding very large property - should pass */
217 prop->name = "large-property-PAGE_SIZEx8";
218 prop->length = PAGE_SIZE * 8;
219 prop->value = kzalloc(prop->length, GFP_KERNEL);
220 unittest(prop->value != NULL, "Unable to allocate large buffer\n");
222 unittest(of_add_property(np, prop) == 0,
223 "Adding a large property should have passed\n");
226 static int __init of_unittest_check_node_linkage(struct device_node *np)
228 struct device_node *child;
231 for_each_child_of_node(np, child) {
232 if (child->parent != np) {
233 pr_err("Child node %pOFn links to wrong parent %pOFn\n",
239 rc = of_unittest_check_node_linkage(child);
251 static void __init of_unittest_check_tree_linkage(void)
253 struct device_node *np;
254 int allnode_count = 0, child_count;
259 for_each_of_allnodes(np)
261 child_count = of_unittest_check_node_linkage(of_root);
263 unittest(child_count > 0, "Device node data structure is corrupted\n");
264 unittest(child_count == allnode_count,
265 "allnodes list size (%i) doesn't match sibling lists size (%i)\n",
266 allnode_count, child_count);
267 pr_debug("allnodes list size (%i); sibling lists size (%i)\n", allnode_count, child_count);
270 static void __init of_unittest_printf_one(struct device_node *np, const char *fmt,
271 const char *expected)
277 buf_size = strlen(expected) + 10;
278 buf = kmalloc(buf_size, GFP_KERNEL);
282 /* Baseline; check conversion with a large size limit */
283 memset(buf, 0xff, buf_size);
284 size = snprintf(buf, buf_size - 2, fmt, np);
286 /* use strcmp() instead of strncmp() here to be absolutely sure strings match */
287 unittest((strcmp(buf, expected) == 0) && (buf[size+1] == 0xff),
288 "sprintf failed; fmt='%s' expected='%s' rslt='%s'\n",
291 /* Make sure length limits work */
293 for (i = 0; i < 2; i++, size--) {
294 /* Clear the buffer, and make sure it works correctly still */
295 memset(buf, 0xff, buf_size);
296 snprintf(buf, size+1, fmt, np);
297 unittest(strncmp(buf, expected, size) == 0 && (buf[size+1] == 0xff),
298 "snprintf failed; size=%i fmt='%s' expected='%s' rslt='%s'\n",
299 size, fmt, expected, buf);
304 static void __init of_unittest_printf(void)
306 struct device_node *np;
307 const char *full_name = "/testcase-data/platform-tests/test-device@1/dev@100";
308 char phandle_str[16] = "";
310 np = of_find_node_by_path(full_name);
312 unittest(np, "testcase data missing\n");
316 num_to_str(phandle_str, sizeof(phandle_str), np->phandle, 0);
318 of_unittest_printf_one(np, "%pOF", full_name);
319 of_unittest_printf_one(np, "%pOFf", full_name);
320 of_unittest_printf_one(np, "%pOFn", "dev");
321 of_unittest_printf_one(np, "%2pOFn", "dev");
322 of_unittest_printf_one(np, "%5pOFn", " dev");
323 of_unittest_printf_one(np, "%pOFnc", "dev:test-sub-device");
324 of_unittest_printf_one(np, "%pOFp", phandle_str);
325 of_unittest_printf_one(np, "%pOFP", "dev@100");
326 of_unittest_printf_one(np, "ABC %pOFP ABC", "ABC dev@100 ABC");
327 of_unittest_printf_one(np, "%10pOFP", " dev@100");
328 of_unittest_printf_one(np, "%-10pOFP", "dev@100 ");
329 of_unittest_printf_one(of_root, "%pOFP", "/");
330 of_unittest_printf_one(np, "%pOFF", "----");
331 of_unittest_printf_one(np, "%pOFPF", "dev@100:----");
332 of_unittest_printf_one(np, "%pOFPFPc", "dev@100:----:dev@100:test-sub-device");
333 of_unittest_printf_one(np, "%pOFc", "test-sub-device");
334 of_unittest_printf_one(np, "%pOFC",
335 "\"test-sub-device\",\"test-compat2\",\"test-compat3\"");
339 struct hlist_node node;
340 struct device_node *np;
343 static DEFINE_HASHTABLE(phandle_ht, 8);
344 static void __init of_unittest_check_phandles(void)
346 struct device_node *np;
347 struct node_hash *nh;
348 struct hlist_node *tmp;
349 int i, dup_count = 0, phandle_count = 0;
351 for_each_of_allnodes(np) {
355 hash_for_each_possible(phandle_ht, nh, node, np->phandle) {
356 if (nh->np->phandle == np->phandle) {
357 pr_info("Duplicate phandle! %i used by %pOF and %pOF\n",
358 np->phandle, nh->np, np);
364 nh = kzalloc(sizeof(*nh), GFP_KERNEL);
369 hash_add(phandle_ht, &nh->node, np->phandle);
372 unittest(dup_count == 0, "Found %i duplicates in %i phandles\n",
373 dup_count, phandle_count);
376 hash_for_each_safe(phandle_ht, i, tmp, nh, node) {
382 static void __init of_unittest_parse_phandle_with_args(void)
384 struct device_node *np;
385 struct of_phandle_args args;
388 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
390 pr_err("missing testcase data\n");
394 rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
395 unittest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc);
397 for (i = 0; i < 8; i++) {
400 memset(&args, 0, sizeof(args));
401 rc = of_parse_phandle_with_args(np, "phandle-list",
402 "#phandle-cells", i, &args);
404 /* Test the values from tests-phandle.dtsi */
408 passed &= (args.args_count == 1);
409 passed &= (args.args[0] == (i + 1));
413 passed &= (args.args_count == 2);
414 passed &= (args.args[0] == (i + 1));
415 passed &= (args.args[1] == 0);
418 passed &= (rc == -ENOENT);
422 passed &= (args.args_count == 3);
423 passed &= (args.args[0] == (i + 1));
424 passed &= (args.args[1] == 4);
425 passed &= (args.args[2] == 3);
429 passed &= (args.args_count == 2);
430 passed &= (args.args[0] == (i + 1));
431 passed &= (args.args[1] == 100);
435 passed &= (args.args_count == 0);
439 passed &= (args.args_count == 1);
440 passed &= (args.args[0] == (i + 1));
443 passed &= (rc == -ENOENT);
449 unittest(passed, "index %i - data error on node %pOF rc=%i\n",
453 /* Check for missing list property */
454 memset(&args, 0, sizeof(args));
455 rc = of_parse_phandle_with_args(np, "phandle-list-missing",
456 "#phandle-cells", 0, &args);
457 unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
458 rc = of_count_phandle_with_args(np, "phandle-list-missing",
460 unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
462 /* Check for missing cells property */
463 memset(&args, 0, sizeof(args));
465 EXPECT_BEGIN(KERN_INFO,
466 "OF: /testcase-data/phandle-tests/consumer-a: could not get #phandle-cells-missing for /testcase-data/phandle-tests/provider1");
468 rc = of_parse_phandle_with_args(np, "phandle-list",
469 "#phandle-cells-missing", 0, &args);
471 EXPECT_END(KERN_INFO,
472 "OF: /testcase-data/phandle-tests/consumer-a: could not get #phandle-cells-missing for /testcase-data/phandle-tests/provider1");
474 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
476 EXPECT_BEGIN(KERN_INFO,
477 "OF: /testcase-data/phandle-tests/consumer-a: could not get #phandle-cells-missing for /testcase-data/phandle-tests/provider1");
479 rc = of_count_phandle_with_args(np, "phandle-list",
480 "#phandle-cells-missing");
482 EXPECT_END(KERN_INFO,
483 "OF: /testcase-data/phandle-tests/consumer-a: could not get #phandle-cells-missing for /testcase-data/phandle-tests/provider1");
485 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
487 /* Check for bad phandle in list */
488 memset(&args, 0, sizeof(args));
490 EXPECT_BEGIN(KERN_INFO,
491 "OF: /testcase-data/phandle-tests/consumer-a: could not find phandle");
493 rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle",
494 "#phandle-cells", 0, &args);
496 EXPECT_END(KERN_INFO,
497 "OF: /testcase-data/phandle-tests/consumer-a: could not find phandle");
499 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
501 EXPECT_BEGIN(KERN_INFO,
502 "OF: /testcase-data/phandle-tests/consumer-a: could not find phandle");
504 rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle",
507 EXPECT_END(KERN_INFO,
508 "OF: /testcase-data/phandle-tests/consumer-a: could not find phandle");
510 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
512 /* Check for incorrectly formed argument list */
513 memset(&args, 0, sizeof(args));
515 EXPECT_BEGIN(KERN_INFO,
516 "OF: /testcase-data/phandle-tests/consumer-a: #phandle-cells = 3 found 1");
518 rc = of_parse_phandle_with_args(np, "phandle-list-bad-args",
519 "#phandle-cells", 1, &args);
521 EXPECT_END(KERN_INFO,
522 "OF: /testcase-data/phandle-tests/consumer-a: #phandle-cells = 3 found 1");
524 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
526 EXPECT_BEGIN(KERN_INFO,
527 "OF: /testcase-data/phandle-tests/consumer-a: #phandle-cells = 3 found 1");
529 rc = of_count_phandle_with_args(np, "phandle-list-bad-args",
532 EXPECT_END(KERN_INFO,
533 "OF: /testcase-data/phandle-tests/consumer-a: #phandle-cells = 3 found 1");
535 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
538 static void __init of_unittest_parse_phandle_with_args_map(void)
540 struct device_node *np, *p0, *p1, *p2, *p3;
541 struct of_phandle_args args;
544 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-b");
546 pr_err("missing testcase data\n");
550 p0 = of_find_node_by_path("/testcase-data/phandle-tests/provider0");
552 pr_err("missing testcase data\n");
556 p1 = of_find_node_by_path("/testcase-data/phandle-tests/provider1");
558 pr_err("missing testcase data\n");
562 p2 = of_find_node_by_path("/testcase-data/phandle-tests/provider2");
564 pr_err("missing testcase data\n");
568 p3 = of_find_node_by_path("/testcase-data/phandle-tests/provider3");
570 pr_err("missing testcase data\n");
574 rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
575 unittest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc);
577 for (i = 0; i < 8; i++) {
580 memset(&args, 0, sizeof(args));
581 rc = of_parse_phandle_with_args_map(np, "phandle-list",
582 "phandle", i, &args);
584 /* Test the values from tests-phandle.dtsi */
588 passed &= (args.np == p1);
589 passed &= (args.args_count == 1);
590 passed &= (args.args[0] == 1);
594 passed &= (args.np == p3);
595 passed &= (args.args_count == 3);
596 passed &= (args.args[0] == 2);
597 passed &= (args.args[1] == 5);
598 passed &= (args.args[2] == 3);
601 passed &= (rc == -ENOENT);
605 passed &= (args.np == p0);
606 passed &= (args.args_count == 0);
610 passed &= (args.np == p1);
611 passed &= (args.args_count == 1);
612 passed &= (args.args[0] == 3);
616 passed &= (args.np == p0);
617 passed &= (args.args_count == 0);
621 passed &= (args.np == p2);
622 passed &= (args.args_count == 2);
623 passed &= (args.args[0] == 15);
624 passed &= (args.args[1] == 0x20);
627 passed &= (rc == -ENOENT);
633 unittest(passed, "index %i - data error on node %s rc=%i\n",
634 i, args.np->full_name, rc);
637 /* Check for missing list property */
638 memset(&args, 0, sizeof(args));
639 rc = of_parse_phandle_with_args_map(np, "phandle-list-missing",
640 "phandle", 0, &args);
641 unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
643 /* Check for missing cells,map,mask property */
644 memset(&args, 0, sizeof(args));
646 EXPECT_BEGIN(KERN_INFO,
647 "OF: /testcase-data/phandle-tests/consumer-b: could not get #phandle-missing-cells for /testcase-data/phandle-tests/provider1");
649 rc = of_parse_phandle_with_args_map(np, "phandle-list",
650 "phandle-missing", 0, &args);
651 EXPECT_END(KERN_INFO,
652 "OF: /testcase-data/phandle-tests/consumer-b: could not get #phandle-missing-cells for /testcase-data/phandle-tests/provider1");
654 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
656 /* Check for bad phandle in list */
657 memset(&args, 0, sizeof(args));
659 EXPECT_BEGIN(KERN_INFO,
660 "OF: /testcase-data/phandle-tests/consumer-b: could not find phandle");
662 rc = of_parse_phandle_with_args_map(np, "phandle-list-bad-phandle",
663 "phandle", 0, &args);
664 EXPECT_END(KERN_INFO,
665 "OF: /testcase-data/phandle-tests/consumer-b: could not find phandle");
667 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
669 /* Check for incorrectly formed argument list */
670 memset(&args, 0, sizeof(args));
672 EXPECT_BEGIN(KERN_INFO,
673 "OF: /testcase-data/phandle-tests/consumer-b: #phandle-cells = 2 found 1");
675 rc = of_parse_phandle_with_args_map(np, "phandle-list-bad-args",
676 "phandle", 1, &args);
677 EXPECT_END(KERN_INFO,
678 "OF: /testcase-data/phandle-tests/consumer-b: #phandle-cells = 2 found 1");
680 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
683 static void __init of_unittest_property_string(void)
685 const char *strings[4];
686 struct device_node *np;
689 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
691 pr_err("No testcase data in device tree\n");
695 rc = of_property_match_string(np, "phandle-list-names", "first");
696 unittest(rc == 0, "first expected:0 got:%i\n", rc);
697 rc = of_property_match_string(np, "phandle-list-names", "second");
698 unittest(rc == 1, "second expected:1 got:%i\n", rc);
699 rc = of_property_match_string(np, "phandle-list-names", "third");
700 unittest(rc == 2, "third expected:2 got:%i\n", rc);
701 rc = of_property_match_string(np, "phandle-list-names", "fourth");
702 unittest(rc == -ENODATA, "unmatched string; rc=%i\n", rc);
703 rc = of_property_match_string(np, "missing-property", "blah");
704 unittest(rc == -EINVAL, "missing property; rc=%i\n", rc);
705 rc = of_property_match_string(np, "empty-property", "blah");
706 unittest(rc == -ENODATA, "empty property; rc=%i\n", rc);
707 rc = of_property_match_string(np, "unterminated-string", "blah");
708 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
710 /* of_property_count_strings() tests */
711 rc = of_property_count_strings(np, "string-property");
712 unittest(rc == 1, "Incorrect string count; rc=%i\n", rc);
713 rc = of_property_count_strings(np, "phandle-list-names");
714 unittest(rc == 3, "Incorrect string count; rc=%i\n", rc);
715 rc = of_property_count_strings(np, "unterminated-string");
716 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
717 rc = of_property_count_strings(np, "unterminated-string-list");
718 unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
720 /* of_property_read_string_index() tests */
721 rc = of_property_read_string_index(np, "string-property", 0, strings);
722 unittest(rc == 0 && !strcmp(strings[0], "foobar"), "of_property_read_string_index() failure; rc=%i\n", rc);
724 rc = of_property_read_string_index(np, "string-property", 1, strings);
725 unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
726 rc = of_property_read_string_index(np, "phandle-list-names", 0, strings);
727 unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
728 rc = of_property_read_string_index(np, "phandle-list-names", 1, strings);
729 unittest(rc == 0 && !strcmp(strings[0], "second"), "of_property_read_string_index() failure; rc=%i\n", rc);
730 rc = of_property_read_string_index(np, "phandle-list-names", 2, strings);
731 unittest(rc == 0 && !strcmp(strings[0], "third"), "of_property_read_string_index() failure; rc=%i\n", rc);
733 rc = of_property_read_string_index(np, "phandle-list-names", 3, strings);
734 unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
736 rc = of_property_read_string_index(np, "unterminated-string", 0, strings);
737 unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
738 rc = of_property_read_string_index(np, "unterminated-string-list", 0, strings);
739 unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
741 rc = of_property_read_string_index(np, "unterminated-string-list", 2, strings); /* should fail */
742 unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
745 /* of_property_read_string_array() tests */
746 rc = of_property_read_string_array(np, "string-property", strings, 4);
747 unittest(rc == 1, "Incorrect string count; rc=%i\n", rc);
748 rc = of_property_read_string_array(np, "phandle-list-names", strings, 4);
749 unittest(rc == 3, "Incorrect string count; rc=%i\n", rc);
750 rc = of_property_read_string_array(np, "unterminated-string", strings, 4);
751 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
752 /* -- An incorrectly formed string should cause a failure */
753 rc = of_property_read_string_array(np, "unterminated-string-list", strings, 4);
754 unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
755 /* -- parsing the correctly formed strings should still work: */
757 rc = of_property_read_string_array(np, "unterminated-string-list", strings, 2);
758 unittest(rc == 2 && strings[2] == NULL, "of_property_read_string_array() failure; rc=%i\n", rc);
760 rc = of_property_read_string_array(np, "phandle-list-names", strings, 1);
761 unittest(rc == 1 && strings[1] == NULL, "Overwrote end of string array; rc=%i, str='%s'\n", rc, strings[1]);
764 #define propcmp(p1, p2) (((p1)->length == (p2)->length) && \
765 (p1)->value && (p2)->value && \
766 !memcmp((p1)->value, (p2)->value, (p1)->length) && \
767 !strcmp((p1)->name, (p2)->name))
768 static void __init of_unittest_property_copy(void)
770 #ifdef CONFIG_OF_DYNAMIC
771 struct property p1 = { .name = "p1", .length = 0, .value = "" };
772 struct property p2 = { .name = "p2", .length = 5, .value = "abcd" };
773 struct property *new;
775 new = __of_prop_dup(&p1, GFP_KERNEL);
776 unittest(new && propcmp(&p1, new), "empty property didn't copy correctly\n");
781 new = __of_prop_dup(&p2, GFP_KERNEL);
782 unittest(new && propcmp(&p2, new), "non-empty property didn't copy correctly\n");
789 static void __init of_unittest_changeset(void)
791 #ifdef CONFIG_OF_DYNAMIC
792 struct property *ppadd, padd = { .name = "prop-add", .length = 1, .value = "" };
793 struct property *ppname_n1, pname_n1 = { .name = "name", .length = 3, .value = "n1" };
794 struct property *ppname_n2, pname_n2 = { .name = "name", .length = 3, .value = "n2" };
795 struct property *ppname_n21, pname_n21 = { .name = "name", .length = 3, .value = "n21" };
796 struct property *ppupdate, pupdate = { .name = "prop-update", .length = 5, .value = "abcd" };
797 struct property *ppremove;
798 struct device_node *n1, *n2, *n21, *nchangeset, *nremove, *parent, *np;
799 struct of_changeset chgset;
801 n1 = __of_node_dup(NULL, "n1");
802 unittest(n1, "testcase setup failure\n");
804 n2 = __of_node_dup(NULL, "n2");
805 unittest(n2, "testcase setup failure\n");
807 n21 = __of_node_dup(NULL, "n21");
808 unittest(n21, "testcase setup failure %p\n", n21);
810 nchangeset = of_find_node_by_path("/testcase-data/changeset");
811 nremove = of_get_child_by_name(nchangeset, "node-remove");
812 unittest(nremove, "testcase setup failure\n");
814 ppadd = __of_prop_dup(&padd, GFP_KERNEL);
815 unittest(ppadd, "testcase setup failure\n");
817 ppname_n1 = __of_prop_dup(&pname_n1, GFP_KERNEL);
818 unittest(ppname_n1, "testcase setup failure\n");
820 ppname_n2 = __of_prop_dup(&pname_n2, GFP_KERNEL);
821 unittest(ppname_n2, "testcase setup failure\n");
823 ppname_n21 = __of_prop_dup(&pname_n21, GFP_KERNEL);
824 unittest(ppname_n21, "testcase setup failure\n");
826 ppupdate = __of_prop_dup(&pupdate, GFP_KERNEL);
827 unittest(ppupdate, "testcase setup failure\n");
834 ppremove = of_find_property(parent, "prop-remove", NULL);
835 unittest(ppremove, "failed to find removal prop");
837 of_changeset_init(&chgset);
839 unittest(!of_changeset_attach_node(&chgset, n1), "fail attach n1\n");
840 unittest(!of_changeset_add_property(&chgset, n1, ppname_n1), "fail add prop name\n");
842 unittest(!of_changeset_attach_node(&chgset, n2), "fail attach n2\n");
843 unittest(!of_changeset_add_property(&chgset, n2, ppname_n2), "fail add prop name\n");
845 unittest(!of_changeset_detach_node(&chgset, nremove), "fail remove node\n");
846 unittest(!of_changeset_add_property(&chgset, n21, ppname_n21), "fail add prop name\n");
848 unittest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n");
850 unittest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop prop-add\n");
851 unittest(!of_changeset_update_property(&chgset, parent, ppupdate), "fail update prop\n");
852 unittest(!of_changeset_remove_property(&chgset, parent, ppremove), "fail remove prop\n");
854 unittest(!of_changeset_apply(&chgset), "apply failed\n");
856 of_node_put(nchangeset);
858 /* Make sure node names are constructed correctly */
859 unittest((np = of_find_node_by_path("/testcase-data/changeset/n2/n21")),
860 "'%pOF' not added\n", n21);
863 unittest(!of_changeset_revert(&chgset), "revert failed\n");
865 of_changeset_destroy(&chgset);
873 static void __init of_unittest_dma_get_max_cpu_address(void)
875 struct device_node *np;
876 phys_addr_t cpu_addr;
878 if (!IS_ENABLED(CONFIG_OF_ADDRESS))
881 np = of_find_node_by_path("/testcase-data/address-tests");
883 pr_err("missing testcase data\n");
887 cpu_addr = of_dma_get_max_cpu_address(np);
888 unittest(cpu_addr == 0x4fffffff,
889 "of_dma_get_max_cpu_address: wrong CPU addr %pad (expecting %x)\n",
890 &cpu_addr, 0x4fffffff);
893 static void __init of_unittest_dma_ranges_one(const char *path,
894 u64 expect_dma_addr, u64 expect_paddr)
896 #ifdef CONFIG_HAS_DMA
897 struct device_node *np;
898 const struct bus_dma_region *map = NULL;
901 np = of_find_node_by_path(path);
903 pr_err("missing testcase data\n");
907 rc = of_dma_get_range(np, &map);
909 unittest(!rc, "of_dma_get_range failed on node %pOF rc=%i\n", np, rc);
914 struct device *dev_bogus;
916 dev_bogus = kzalloc(sizeof(struct device), GFP_KERNEL);
918 unittest(0, "kzalloc() failed\n");
923 dev_bogus->dma_range_map = map;
924 paddr = dma_to_phys(dev_bogus, expect_dma_addr);
925 dma_addr = phys_to_dma(dev_bogus, expect_paddr);
927 unittest(paddr == expect_paddr,
928 "of_dma_get_range: wrong phys addr %pap (expecting %llx) on node %pOF\n",
929 &paddr, expect_paddr, np);
930 unittest(dma_addr == expect_dma_addr,
931 "of_dma_get_range: wrong DMA addr %pad (expecting %llx) on node %pOF\n",
932 &dma_addr, expect_dma_addr, np);
941 static void __init of_unittest_parse_dma_ranges(void)
943 of_unittest_dma_ranges_one("/testcase-data/address-tests/device@70000000",
945 if (IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT))
946 of_unittest_dma_ranges_one("/testcase-data/address-tests/bus@80000000/device@1000",
947 0x100000000, 0x20000000);
948 of_unittest_dma_ranges_one("/testcase-data/address-tests/pci@90000000",
949 0x80000000, 0x20000000);
952 static void __init of_unittest_pci_dma_ranges(void)
954 struct device_node *np;
955 struct of_pci_range range;
956 struct of_pci_range_parser parser;
959 if (!IS_ENABLED(CONFIG_PCI))
962 np = of_find_node_by_path("/testcase-data/address-tests/pci@90000000");
964 pr_err("missing testcase data\n");
968 if (of_pci_dma_range_parser_init(&parser, np)) {
969 pr_err("missing dma-ranges property\n");
974 * Get the dma-ranges from the device tree
976 for_each_of_pci_range(&parser, &range) {
978 unittest(range.size == 0x10000000,
979 "for_each_of_pci_range wrong size on node %pOF size=%llx\n",
981 unittest(range.cpu_addr == 0x20000000,
982 "for_each_of_pci_range wrong CPU addr (%llx) on node %pOF",
984 unittest(range.pci_addr == 0x80000000,
985 "for_each_of_pci_range wrong DMA addr (%llx) on node %pOF",
988 unittest(range.size == 0x10000000,
989 "for_each_of_pci_range wrong size on node %pOF size=%llx\n",
991 unittest(range.cpu_addr == 0x40000000,
992 "for_each_of_pci_range wrong CPU addr (%llx) on node %pOF",
994 unittest(range.pci_addr == 0xc0000000,
995 "for_each_of_pci_range wrong DMA addr (%llx) on node %pOF",
1004 static void __init of_unittest_parse_interrupts(void)
1006 struct device_node *np;
1007 struct of_phandle_args args;
1010 if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)
1013 np = of_find_node_by_path("/testcase-data/interrupts/interrupts0");
1015 pr_err("missing testcase data\n");
1019 for (i = 0; i < 4; i++) {
1022 memset(&args, 0, sizeof(args));
1023 rc = of_irq_parse_one(np, i, &args);
1026 passed &= (args.args_count == 1);
1027 passed &= (args.args[0] == (i + 1));
1029 unittest(passed, "index %i - data error on node %pOF rc=%i\n",
1034 np = of_find_node_by_path("/testcase-data/interrupts/interrupts1");
1036 pr_err("missing testcase data\n");
1040 for (i = 0; i < 4; i++) {
1043 memset(&args, 0, sizeof(args));
1044 rc = of_irq_parse_one(np, i, &args);
1046 /* Test the values from tests-phandle.dtsi */
1050 passed &= (args.args_count == 1);
1051 passed &= (args.args[0] == 9);
1055 passed &= (args.args_count == 3);
1056 passed &= (args.args[0] == 10);
1057 passed &= (args.args[1] == 11);
1058 passed &= (args.args[2] == 12);
1062 passed &= (args.args_count == 2);
1063 passed &= (args.args[0] == 13);
1064 passed &= (args.args[1] == 14);
1068 passed &= (args.args_count == 2);
1069 passed &= (args.args[0] == 15);
1070 passed &= (args.args[1] == 16);
1075 unittest(passed, "index %i - data error on node %pOF rc=%i\n",
1081 static void __init of_unittest_parse_interrupts_extended(void)
1083 struct device_node *np;
1084 struct of_phandle_args args;
1087 if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)
1090 np = of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0");
1092 pr_err("missing testcase data\n");
1096 for (i = 0; i < 7; i++) {
1099 memset(&args, 0, sizeof(args));
1100 rc = of_irq_parse_one(np, i, &args);
1102 /* Test the values from tests-phandle.dtsi */
1106 passed &= (args.args_count == 1);
1107 passed &= (args.args[0] == 1);
1111 passed &= (args.args_count == 3);
1112 passed &= (args.args[0] == 2);
1113 passed &= (args.args[1] == 3);
1114 passed &= (args.args[2] == 4);
1118 passed &= (args.args_count == 2);
1119 passed &= (args.args[0] == 5);
1120 passed &= (args.args[1] == 6);
1124 passed &= (args.args_count == 1);
1125 passed &= (args.args[0] == 9);
1129 passed &= (args.args_count == 3);
1130 passed &= (args.args[0] == 10);
1131 passed &= (args.args[1] == 11);
1132 passed &= (args.args[2] == 12);
1136 passed &= (args.args_count == 2);
1137 passed &= (args.args[0] == 13);
1138 passed &= (args.args[1] == 14);
1142 * Tests child node that is missing property
1143 * #address-cells. See the comments in
1144 * drivers/of/unittest-data/tests-interrupts.dtsi
1145 * nodes intmap1 and interrupts-extended0
1148 passed &= (args.args_count == 1);
1149 passed &= (args.args[0] == 15);
1155 unittest(passed, "index %i - data error on node %pOF rc=%i\n",
1161 static const struct of_device_id match_node_table[] = {
1162 { .data = "A", .name = "name0", }, /* Name alone is lowest priority */
1163 { .data = "B", .type = "type1", }, /* followed by type alone */
1165 { .data = "Ca", .name = "name2", .type = "type1", }, /* followed by both together */
1166 { .data = "Cb", .name = "name2", }, /* Only match when type doesn't match */
1167 { .data = "Cc", .name = "name2", .type = "type2", },
1169 { .data = "E", .compatible = "compat3" },
1170 { .data = "G", .compatible = "compat2", },
1171 { .data = "H", .compatible = "compat2", .name = "name5", },
1172 { .data = "I", .compatible = "compat2", .type = "type1", },
1173 { .data = "J", .compatible = "compat2", .type = "type1", .name = "name8", },
1174 { .data = "K", .compatible = "compat2", .name = "name9", },
1181 } match_node_tests[] = {
1182 { .path = "/testcase-data/match-node/name0", .data = "A", },
1183 { .path = "/testcase-data/match-node/name1", .data = "B", },
1184 { .path = "/testcase-data/match-node/a/name2", .data = "Ca", },
1185 { .path = "/testcase-data/match-node/b/name2", .data = "Cb", },
1186 { .path = "/testcase-data/match-node/c/name2", .data = "Cc", },
1187 { .path = "/testcase-data/match-node/name3", .data = "E", },
1188 { .path = "/testcase-data/match-node/name4", .data = "G", },
1189 { .path = "/testcase-data/match-node/name5", .data = "H", },
1190 { .path = "/testcase-data/match-node/name6", .data = "G", },
1191 { .path = "/testcase-data/match-node/name7", .data = "I", },
1192 { .path = "/testcase-data/match-node/name8", .data = "J", },
1193 { .path = "/testcase-data/match-node/name9", .data = "K", },
1196 static void __init of_unittest_match_node(void)
1198 struct device_node *np;
1199 const struct of_device_id *match;
1202 for (i = 0; i < ARRAY_SIZE(match_node_tests); i++) {
1203 np = of_find_node_by_path(match_node_tests[i].path);
1205 unittest(0, "missing testcase node %s\n",
1206 match_node_tests[i].path);
1210 match = of_match_node(match_node_table, np);
1212 unittest(0, "%s didn't match anything\n",
1213 match_node_tests[i].path);
1217 if (strcmp(match->data, match_node_tests[i].data) != 0) {
1218 unittest(0, "%s got wrong match. expected %s, got %s\n",
1219 match_node_tests[i].path, match_node_tests[i].data,
1220 (const char *)match->data);
1223 unittest(1, "passed");
1227 static struct resource test_bus_res = DEFINE_RES_MEM(0xfffffff8, 2);
1228 static const struct platform_device_info test_bus_info = {
1229 .name = "unittest-bus",
1231 static void __init of_unittest_platform_populate(void)
1234 struct device_node *np, *child, *grandchild;
1235 struct platform_device *pdev, *test_bus;
1236 const struct of_device_id match[] = {
1237 { .compatible = "test-device", },
1241 np = of_find_node_by_path("/testcase-data");
1242 of_platform_default_populate(np, NULL, NULL);
1244 /* Test that a missing irq domain returns -EPROBE_DEFER */
1245 np = of_find_node_by_path("/testcase-data/testcase-device1");
1246 pdev = of_find_device_by_node(np);
1247 unittest(pdev, "device 1 creation failed\n");
1249 if (!(of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)) {
1250 irq = platform_get_irq(pdev, 0);
1251 unittest(irq == -EPROBE_DEFER,
1252 "device deferred probe failed - %d\n", irq);
1254 /* Test that a parsing failure does not return -EPROBE_DEFER */
1255 np = of_find_node_by_path("/testcase-data/testcase-device2");
1256 pdev = of_find_device_by_node(np);
1257 unittest(pdev, "device 2 creation failed\n");
1259 EXPECT_BEGIN(KERN_INFO,
1260 "platform testcase-data:testcase-device2: error -ENXIO: IRQ index 0 not found");
1262 irq = platform_get_irq(pdev, 0);
1264 EXPECT_END(KERN_INFO,
1265 "platform testcase-data:testcase-device2: error -ENXIO: IRQ index 0 not found");
1267 unittest(irq < 0 && irq != -EPROBE_DEFER,
1268 "device parsing error failed - %d\n", irq);
1271 np = of_find_node_by_path("/testcase-data/platform-tests");
1272 unittest(np, "No testcase data in device tree\n");
1276 test_bus = platform_device_register_full(&test_bus_info);
1277 rc = PTR_ERR_OR_ZERO(test_bus);
1278 unittest(!rc, "testbus registration failed; rc=%i\n", rc);
1283 test_bus->dev.of_node = np;
1286 * Add a dummy resource to the test bus node after it is
1287 * registered to catch problems with un-inserted resources. The
1288 * DT code doesn't insert the resources, and it has caused the
1289 * kernel to oops in the past. This makes sure the same bug
1290 * doesn't crop up again.
1292 platform_device_add_resources(test_bus, &test_bus_res, 1);
1294 of_platform_populate(np, match, NULL, &test_bus->dev);
1295 for_each_child_of_node(np, child) {
1296 for_each_child_of_node(child, grandchild) {
1297 pdev = of_find_device_by_node(grandchild);
1299 "Could not create device for node '%pOFn'\n",
1301 platform_device_put(pdev);
1305 of_platform_depopulate(&test_bus->dev);
1306 for_each_child_of_node(np, child) {
1307 for_each_child_of_node(child, grandchild)
1308 unittest(!of_find_device_by_node(grandchild),
1309 "device didn't get destroyed '%pOFn'\n",
1313 platform_device_unregister(test_bus);
1318 * update_node_properties - adds the properties
1319 * of np into dup node (present in live tree) and
1320 * updates parent of children of np to dup.
1322 * @np: node whose properties are being added to the live tree
1323 * @dup: node present in live tree to be updated
1325 static void update_node_properties(struct device_node *np,
1326 struct device_node *dup)
1328 struct property *prop;
1329 struct property *save_next;
1330 struct device_node *child;
1333 for_each_child_of_node(np, child)
1334 child->parent = dup;
1337 * "unittest internal error: unable to add testdata property"
1339 * If this message reports a property in node '/__symbols__' then
1340 * the respective unittest overlay contains a label that has the
1341 * same name as a label in the live devicetree. The label will
1342 * be in the live devicetree only if the devicetree source was
1343 * compiled with the '-@' option. If you encounter this error,
1344 * please consider renaming __all__ of the labels in the unittest
1345 * overlay dts files with an odd prefix that is unlikely to be
1346 * used in a real devicetree.
1350 * open code for_each_property_of_node() because of_add_property()
1351 * sets prop->next to NULL
1353 for (prop = np->properties; prop != NULL; prop = save_next) {
1354 save_next = prop->next;
1355 ret = of_add_property(dup, prop);
1357 if (ret == -EEXIST && !strcmp(prop->name, "name"))
1359 pr_err("unittest internal error: unable to add testdata property %pOF/%s",
1366 * attach_node_and_children - attaches nodes
1367 * and its children to live tree.
1368 * CAUTION: misleading function name - if node @np already exists in
1369 * the live tree then children of @np are *not* attached to the live
1370 * tree. This works for the current test devicetree nodes because such
1371 * nodes do not have child nodes.
1373 * @np: Node to attach to live tree
1375 static void attach_node_and_children(struct device_node *np)
1377 struct device_node *next, *dup, *child;
1378 unsigned long flags;
1379 const char *full_name;
1381 full_name = kasprintf(GFP_KERNEL, "%pOF", np);
1383 if (!strcmp(full_name, "/__local_fixups__") ||
1384 !strcmp(full_name, "/__fixups__")) {
1389 dup = of_find_node_by_path(full_name);
1392 update_node_properties(np, dup);
1399 mutex_lock(&of_mutex);
1400 raw_spin_lock_irqsave(&devtree_lock, flags);
1401 np->sibling = np->parent->child;
1402 np->parent->child = np;
1403 of_node_clear_flag(np, OF_DETACHED);
1404 raw_spin_unlock_irqrestore(&devtree_lock, flags);
1406 __of_attach_node_sysfs(np);
1407 mutex_unlock(&of_mutex);
1410 next = child->sibling;
1411 attach_node_and_children(child);
1417 * unittest_data_add - Reads, copies data from
1418 * linked tree and attaches it to the live tree
1420 static int __init unittest_data_add(void)
1422 void *unittest_data;
1423 void *unittest_data_align;
1424 struct device_node *unittest_data_node = NULL, *np;
1426 * __dtb_testcases_begin[] and __dtb_testcases_end[] are magically
1427 * created by cmd_dt_S_dtb in scripts/Makefile.lib
1429 extern uint8_t __dtb_testcases_begin[];
1430 extern uint8_t __dtb_testcases_end[];
1431 const int size = __dtb_testcases_end - __dtb_testcases_begin;
1436 pr_warn("%s: testcases is empty\n", __func__);
1441 unittest_data = kmalloc(size + FDT_ALIGN_SIZE, GFP_KERNEL);
1445 unittest_data_align = PTR_ALIGN(unittest_data, FDT_ALIGN_SIZE);
1446 memcpy(unittest_data_align, __dtb_testcases_begin, size);
1448 ret = of_fdt_unflatten_tree(unittest_data_align, NULL, &unittest_data_node);
1450 pr_warn("%s: unflatten testcases tree failed\n", __func__);
1451 kfree(unittest_data);
1454 if (!unittest_data_node) {
1455 pr_warn("%s: testcases tree is empty\n", __func__);
1456 kfree(unittest_data);
1461 * This lock normally encloses of_resolve_phandles()
1463 of_overlay_mutex_lock();
1465 rc = of_resolve_phandles(unittest_data_node);
1467 pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__, rc);
1468 of_overlay_mutex_unlock();
1473 of_root = unittest_data_node;
1474 for_each_of_allnodes(np)
1475 __of_attach_node_sysfs(np);
1476 of_aliases = of_find_node_by_path("/aliases");
1477 of_chosen = of_find_node_by_path("/chosen");
1478 of_overlay_mutex_unlock();
1482 EXPECT_BEGIN(KERN_INFO,
1483 "Duplicate name in testcase-data, renamed to \"duplicate-name#1\"");
1485 /* attach the sub-tree to live tree */
1486 np = unittest_data_node->child;
1488 struct device_node *next = np->sibling;
1490 np->parent = of_root;
1491 attach_node_and_children(np);
1495 EXPECT_END(KERN_INFO,
1496 "Duplicate name in testcase-data, renamed to \"duplicate-name#1\"");
1498 of_overlay_mutex_unlock();
1503 #ifdef CONFIG_OF_OVERLAY
1504 static int __init overlay_data_apply(const char *overlay_name, int *ovcs_id);
1506 static int unittest_probe(struct platform_device *pdev)
1508 struct device *dev = &pdev->dev;
1509 struct device_node *np = dev->of_node;
1512 dev_err(dev, "No OF data for device\n");
1517 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
1519 of_platform_populate(np, NULL, NULL, &pdev->dev);
1524 static int unittest_remove(struct platform_device *pdev)
1526 struct device *dev = &pdev->dev;
1527 struct device_node *np = dev->of_node;
1529 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
1533 static const struct of_device_id unittest_match[] = {
1534 { .compatible = "unittest", },
1538 static struct platform_driver unittest_driver = {
1539 .probe = unittest_probe,
1540 .remove = unittest_remove,
1543 .of_match_table = of_match_ptr(unittest_match),
1547 /* get the platform device instantiated at the path */
1548 static struct platform_device *of_path_to_platform_device(const char *path)
1550 struct device_node *np;
1551 struct platform_device *pdev;
1553 np = of_find_node_by_path(path);
1557 pdev = of_find_device_by_node(np);
1563 /* find out if a platform device exists at that path */
1564 static int of_path_platform_device_exists(const char *path)
1566 struct platform_device *pdev;
1568 pdev = of_path_to_platform_device(path);
1569 platform_device_put(pdev);
1570 return pdev != NULL;
1573 #ifdef CONFIG_OF_GPIO
1575 struct unittest_gpio_dev {
1576 struct gpio_chip chip;
1579 static int unittest_gpio_chip_request_count;
1580 static int unittest_gpio_probe_count;
1581 static int unittest_gpio_probe_pass_count;
1583 static int unittest_gpio_chip_request(struct gpio_chip *chip, unsigned int offset)
1585 unittest_gpio_chip_request_count++;
1587 pr_debug("%s(): %s %d %d\n", __func__, chip->label, offset,
1588 unittest_gpio_chip_request_count);
1592 static int unittest_gpio_probe(struct platform_device *pdev)
1594 struct unittest_gpio_dev *devptr;
1597 unittest_gpio_probe_count++;
1599 devptr = kzalloc(sizeof(*devptr), GFP_KERNEL);
1603 platform_set_drvdata(pdev, devptr);
1605 devptr->chip.fwnode = dev_fwnode(&pdev->dev);
1606 devptr->chip.label = "of-unittest-gpio";
1607 devptr->chip.base = -1; /* dynamic allocation */
1608 devptr->chip.ngpio = 5;
1609 devptr->chip.request = unittest_gpio_chip_request;
1611 ret = gpiochip_add_data(&devptr->chip, NULL);
1614 "gpiochip_add_data() for node @%pfw failed, ret = %d\n", devptr->chip.fwnode, ret);
1617 unittest_gpio_probe_pass_count++;
1621 static int unittest_gpio_remove(struct platform_device *pdev)
1623 struct unittest_gpio_dev *devptr = platform_get_drvdata(pdev);
1624 struct device *dev = &pdev->dev;
1626 dev_dbg(dev, "%s for node @%pfw\n", __func__, devptr->chip.fwnode);
1631 if (devptr->chip.base != -1)
1632 gpiochip_remove(&devptr->chip);
1634 platform_set_drvdata(pdev, NULL);
1640 static const struct of_device_id unittest_gpio_id[] = {
1641 { .compatible = "unittest-gpio", },
1645 static struct platform_driver unittest_gpio_driver = {
1646 .probe = unittest_gpio_probe,
1647 .remove = unittest_gpio_remove,
1649 .name = "unittest-gpio",
1650 .of_match_table = of_match_ptr(unittest_gpio_id),
1654 static void __init of_unittest_overlay_gpio(void)
1656 int chip_request_count;
1657 int probe_pass_count;
1661 * tests: apply overlays before registering driver
1662 * Similar to installing a driver as a module, the
1663 * driver is registered after applying the overlays.
1665 * The overlays are applied by overlay_data_apply()
1666 * instead of of_unittest_apply_overlay() so that they
1667 * will not be tracked. Thus they will not be removed
1668 * by of_unittest_remove_tracked_overlays().
1670 * - apply overlay_gpio_01
1671 * - apply overlay_gpio_02a
1672 * - apply overlay_gpio_02b
1675 * register driver will result in
1676 * - probe and processing gpio hog for overlay_gpio_01
1677 * - probe for overlay_gpio_02a
1678 * - processing gpio for overlay_gpio_02b
1681 probe_pass_count = unittest_gpio_probe_pass_count;
1682 chip_request_count = unittest_gpio_chip_request_count;
1685 * overlay_gpio_01 contains gpio node and child gpio hog node
1686 * overlay_gpio_02a contains gpio node
1687 * overlay_gpio_02b contains child gpio hog node
1690 unittest(overlay_data_apply("overlay_gpio_01", NULL),
1691 "Adding overlay 'overlay_gpio_01' failed\n");
1693 unittest(overlay_data_apply("overlay_gpio_02a", NULL),
1694 "Adding overlay 'overlay_gpio_02a' failed\n");
1696 unittest(overlay_data_apply("overlay_gpio_02b", NULL),
1697 "Adding overlay 'overlay_gpio_02b' failed\n");
1700 * messages are the result of the probes, after the
1701 * driver is registered
1704 EXPECT_BEGIN(KERN_INFO,
1705 "gpio-<<int>> (line-B-input): hogged as input\n");
1707 EXPECT_BEGIN(KERN_INFO,
1708 "gpio-<<int>> (line-A-input): hogged as input\n");
1710 ret = platform_driver_register(&unittest_gpio_driver);
1711 if (unittest(ret == 0, "could not register unittest gpio driver\n"))
1714 EXPECT_END(KERN_INFO,
1715 "gpio-<<int>> (line-A-input): hogged as input\n");
1716 EXPECT_END(KERN_INFO,
1717 "gpio-<<int>> (line-B-input): hogged as input\n");
1719 unittest(probe_pass_count + 2 == unittest_gpio_probe_pass_count,
1720 "unittest_gpio_probe() failed or not called\n");
1722 unittest(chip_request_count + 2 == unittest_gpio_chip_request_count,
1723 "unittest_gpio_chip_request() called %d times (expected 1 time)\n",
1724 unittest_gpio_chip_request_count - chip_request_count);
1727 * tests: apply overlays after registering driver
1729 * Similar to a driver built-in to the kernel, the
1730 * driver is registered before applying the overlays.
1732 * overlay_gpio_03 contains gpio node and child gpio hog node
1734 * - apply overlay_gpio_03
1736 * apply overlay will result in
1737 * - probe and processing gpio hog.
1740 probe_pass_count = unittest_gpio_probe_pass_count;
1741 chip_request_count = unittest_gpio_chip_request_count;
1743 EXPECT_BEGIN(KERN_INFO,
1744 "gpio-<<int>> (line-D-input): hogged as input\n");
1746 /* overlay_gpio_03 contains gpio node and child gpio hog node */
1748 unittest(overlay_data_apply("overlay_gpio_03", NULL),
1749 "Adding overlay 'overlay_gpio_03' failed\n");
1751 EXPECT_END(KERN_INFO,
1752 "gpio-<<int>> (line-D-input): hogged as input\n");
1754 unittest(probe_pass_count + 1 == unittest_gpio_probe_pass_count,
1755 "unittest_gpio_probe() failed or not called\n");
1757 unittest(chip_request_count + 1 == unittest_gpio_chip_request_count,
1758 "unittest_gpio_chip_request() called %d times (expected 1 time)\n",
1759 unittest_gpio_chip_request_count - chip_request_count);
1762 * overlay_gpio_04a contains gpio node
1764 * - apply overlay_gpio_04a
1766 * apply the overlay will result in
1767 * - probe for overlay_gpio_04a
1770 probe_pass_count = unittest_gpio_probe_pass_count;
1771 chip_request_count = unittest_gpio_chip_request_count;
1773 /* overlay_gpio_04a contains gpio node */
1775 unittest(overlay_data_apply("overlay_gpio_04a", NULL),
1776 "Adding overlay 'overlay_gpio_04a' failed\n");
1778 unittest(probe_pass_count + 1 == unittest_gpio_probe_pass_count,
1779 "unittest_gpio_probe() failed or not called\n");
1782 * overlay_gpio_04b contains child gpio hog node
1784 * - apply overlay_gpio_04b
1786 * apply the overlay will result in
1787 * - processing gpio for overlay_gpio_04b
1790 EXPECT_BEGIN(KERN_INFO,
1791 "gpio-<<int>> (line-C-input): hogged as input\n");
1793 /* overlay_gpio_04b contains child gpio hog node */
1795 unittest(overlay_data_apply("overlay_gpio_04b", NULL),
1796 "Adding overlay 'overlay_gpio_04b' failed\n");
1798 EXPECT_END(KERN_INFO,
1799 "gpio-<<int>> (line-C-input): hogged as input\n");
1801 unittest(chip_request_count + 1 == unittest_gpio_chip_request_count,
1802 "unittest_gpio_chip_request() called %d times (expected 1 time)\n",
1803 unittest_gpio_chip_request_count - chip_request_count);
1808 static void __init of_unittest_overlay_gpio(void)
1815 #if IS_BUILTIN(CONFIG_I2C)
1817 /* get the i2c client device instantiated at the path */
1818 static struct i2c_client *of_path_to_i2c_client(const char *path)
1820 struct device_node *np;
1821 struct i2c_client *client;
1823 np = of_find_node_by_path(path);
1827 client = of_find_i2c_device_by_node(np);
1833 /* find out if a i2c client device exists at that path */
1834 static int of_path_i2c_client_exists(const char *path)
1836 struct i2c_client *client;
1838 client = of_path_to_i2c_client(path);
1840 put_device(&client->dev);
1841 return client != NULL;
1844 static int of_path_i2c_client_exists(const char *path)
1855 static int of_path_device_type_exists(const char *path,
1856 enum overlay_type ovtype)
1860 return of_path_platform_device_exists(path);
1862 return of_path_i2c_client_exists(path);
1867 static const char *unittest_path(int nr, enum overlay_type ovtype)
1870 static char buf[256];
1874 base = "/testcase-data/overlay-node/test-bus";
1877 base = "/testcase-data/overlay-node/test-bus/i2c-test-bus";
1883 snprintf(buf, sizeof(buf) - 1, "%s/test-unittest%d", base, nr);
1884 buf[sizeof(buf) - 1] = '\0';
1888 static int of_unittest_device_exists(int unittest_nr, enum overlay_type ovtype)
1892 path = unittest_path(unittest_nr, ovtype);
1896 return of_path_platform_device_exists(path);
1898 return of_path_i2c_client_exists(path);
1903 static const char *overlay_name_from_nr(int nr)
1905 static char buf[256];
1907 snprintf(buf, sizeof(buf) - 1,
1909 buf[sizeof(buf) - 1] = '\0';
1914 static const char *bus_path = "/testcase-data/overlay-node/test-bus";
1916 #define MAX_TRACK_OVCS_IDS 256
1918 static int track_ovcs_id[MAX_TRACK_OVCS_IDS];
1919 static int track_ovcs_id_overlay_nr[MAX_TRACK_OVCS_IDS];
1920 static int track_ovcs_id_cnt;
1922 static void of_unittest_track_overlay(int ovcs_id, int overlay_nr)
1924 if (WARN_ON(track_ovcs_id_cnt >= MAX_TRACK_OVCS_IDS))
1927 track_ovcs_id[track_ovcs_id_cnt] = ovcs_id;
1928 track_ovcs_id_overlay_nr[track_ovcs_id_cnt] = overlay_nr;
1929 track_ovcs_id_cnt++;
1932 static void of_unittest_untrack_overlay(int ovcs_id)
1934 if (WARN_ON(track_ovcs_id_cnt < 1))
1937 track_ovcs_id_cnt--;
1939 /* If out of synch then test is broken. Do not try to recover. */
1940 WARN_ON(track_ovcs_id[track_ovcs_id_cnt] != ovcs_id);
1943 static void of_unittest_remove_tracked_overlays(void)
1945 int ret, ovcs_id, overlay_nr, save_ovcs_id;
1946 const char *overlay_name;
1948 while (track_ovcs_id_cnt > 0) {
1950 ovcs_id = track_ovcs_id[track_ovcs_id_cnt - 1];
1951 overlay_nr = track_ovcs_id_overlay_nr[track_ovcs_id_cnt - 1];
1952 save_ovcs_id = ovcs_id;
1953 ret = of_overlay_remove(&ovcs_id);
1954 if (ret == -ENODEV) {
1955 overlay_name = overlay_name_from_nr(overlay_nr);
1956 pr_warn("%s: of_overlay_remove() for overlay \"%s\" failed, ret = %d\n",
1957 __func__, overlay_name, ret);
1959 of_unittest_untrack_overlay(save_ovcs_id);
1964 static int __init of_unittest_apply_overlay(int overlay_nr, int *ovcs_id)
1967 * The overlay will be tracked, thus it will be removed
1968 * by of_unittest_remove_tracked_overlays().
1971 const char *overlay_name;
1973 overlay_name = overlay_name_from_nr(overlay_nr);
1975 if (!overlay_data_apply(overlay_name, ovcs_id)) {
1976 unittest(0, "could not apply overlay \"%s\"\n", overlay_name);
1979 of_unittest_track_overlay(*ovcs_id, overlay_nr);
1984 /* apply an overlay while checking before and after states */
1985 static int __init of_unittest_apply_overlay_check(int overlay_nr,
1986 int unittest_nr, int before, int after,
1987 enum overlay_type ovtype)
1991 /* unittest device must not be in before state */
1992 if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
1993 unittest(0, "%s with device @\"%s\" %s\n",
1994 overlay_name_from_nr(overlay_nr),
1995 unittest_path(unittest_nr, ovtype),
1996 !before ? "enabled" : "disabled");
2001 ret = of_unittest_apply_overlay(overlay_nr, &ovcs_id);
2003 /* of_unittest_apply_overlay already called unittest() */
2007 /* unittest device must be to set to after state */
2008 if (of_unittest_device_exists(unittest_nr, ovtype) != after) {
2009 unittest(0, "%s failed to create @\"%s\" %s\n",
2010 overlay_name_from_nr(overlay_nr),
2011 unittest_path(unittest_nr, ovtype),
2012 !after ? "enabled" : "disabled");
2019 /* apply an overlay and then revert it while checking before, after states */
2020 static int __init of_unittest_apply_revert_overlay_check(int overlay_nr,
2021 int unittest_nr, int before, int after,
2022 enum overlay_type ovtype)
2024 int ret, ovcs_id, save_ovcs_id;
2026 /* unittest device must be in before state */
2027 if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
2028 unittest(0, "%s with device @\"%s\" %s\n",
2029 overlay_name_from_nr(overlay_nr),
2030 unittest_path(unittest_nr, ovtype),
2031 !before ? "enabled" : "disabled");
2035 /* apply the overlay */
2037 ret = of_unittest_apply_overlay(overlay_nr, &ovcs_id);
2039 /* of_unittest_apply_overlay already called unittest() */
2043 /* unittest device must be in after state */
2044 if (of_unittest_device_exists(unittest_nr, ovtype) != after) {
2045 unittest(0, "%s failed to create @\"%s\" %s\n",
2046 overlay_name_from_nr(overlay_nr),
2047 unittest_path(unittest_nr, ovtype),
2048 !after ? "enabled" : "disabled");
2052 save_ovcs_id = ovcs_id;
2053 ret = of_overlay_remove(&ovcs_id);
2055 unittest(0, "%s failed to be destroyed @\"%s\"\n",
2056 overlay_name_from_nr(overlay_nr),
2057 unittest_path(unittest_nr, ovtype));
2060 of_unittest_untrack_overlay(save_ovcs_id);
2062 /* unittest device must be again in before state */
2063 if (of_unittest_device_exists(unittest_nr, PDEV_OVERLAY) != before) {
2064 unittest(0, "%s with device @\"%s\" %s\n",
2065 overlay_name_from_nr(overlay_nr),
2066 unittest_path(unittest_nr, ovtype),
2067 !before ? "enabled" : "disabled");
2074 /* test activation of device */
2075 static void __init of_unittest_overlay_0(void)
2079 EXPECT_BEGIN(KERN_INFO,
2080 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest0/status");
2082 /* device should enable */
2083 ret = of_unittest_apply_overlay_check(0, 0, 0, 1, PDEV_OVERLAY);
2085 EXPECT_END(KERN_INFO,
2086 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest0/status");
2091 unittest(1, "overlay test %d passed\n", 0);
2094 /* test deactivation of device */
2095 static void __init of_unittest_overlay_1(void)
2099 EXPECT_BEGIN(KERN_INFO,
2100 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest1/status");
2102 /* device should disable */
2103 ret = of_unittest_apply_overlay_check(1, 1, 1, 0, PDEV_OVERLAY);
2105 EXPECT_END(KERN_INFO,
2106 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest1/status");
2111 unittest(1, "overlay test %d passed\n", 1);
2115 /* test activation of device */
2116 static void __init of_unittest_overlay_2(void)
2120 EXPECT_BEGIN(KERN_INFO,
2121 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest2/status");
2123 /* device should enable */
2124 ret = of_unittest_apply_overlay_check(2, 2, 0, 1, PDEV_OVERLAY);
2126 EXPECT_END(KERN_INFO,
2127 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest2/status");
2131 unittest(1, "overlay test %d passed\n", 2);
2134 /* test deactivation of device */
2135 static void __init of_unittest_overlay_3(void)
2139 EXPECT_BEGIN(KERN_INFO,
2140 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest3/status");
2142 /* device should disable */
2143 ret = of_unittest_apply_overlay_check(3, 3, 1, 0, PDEV_OVERLAY);
2145 EXPECT_END(KERN_INFO,
2146 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest3/status");
2151 unittest(1, "overlay test %d passed\n", 3);
2154 /* test activation of a full device node */
2155 static void __init of_unittest_overlay_4(void)
2157 /* device should disable */
2158 if (of_unittest_apply_overlay_check(4, 4, 0, 1, PDEV_OVERLAY))
2161 unittest(1, "overlay test %d passed\n", 4);
2164 /* test overlay apply/revert sequence */
2165 static void __init of_unittest_overlay_5(void)
2169 EXPECT_BEGIN(KERN_INFO,
2170 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest5/status");
2172 /* device should disable */
2173 ret = of_unittest_apply_revert_overlay_check(5, 5, 0, 1, PDEV_OVERLAY);
2175 EXPECT_END(KERN_INFO,
2176 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest5/status");
2181 unittest(1, "overlay test %d passed\n", 5);
2184 /* test overlay application in sequence */
2185 static void __init of_unittest_overlay_6(void)
2187 int i, save_ovcs_id[2], ovcs_id;
2188 int overlay_nr = 6, unittest_nr = 6;
2189 int before = 0, after = 1;
2190 const char *overlay_name;
2194 /* unittest device must be in before state */
2195 for (i = 0; i < 2; i++) {
2196 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
2198 unittest(0, "%s with device @\"%s\" %s\n",
2199 overlay_name_from_nr(overlay_nr + i),
2200 unittest_path(unittest_nr + i,
2202 !before ? "enabled" : "disabled");
2207 /* apply the overlays */
2209 EXPECT_BEGIN(KERN_INFO,
2210 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest6/status");
2212 overlay_name = overlay_name_from_nr(overlay_nr + 0);
2214 ret = overlay_data_apply(overlay_name, &ovcs_id);
2217 unittest(0, "could not apply overlay \"%s\"\n", overlay_name);
2220 save_ovcs_id[0] = ovcs_id;
2221 of_unittest_track_overlay(ovcs_id, overlay_nr + 0);
2223 EXPECT_END(KERN_INFO,
2224 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest6/status");
2226 EXPECT_BEGIN(KERN_INFO,
2227 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest7/status");
2229 overlay_name = overlay_name_from_nr(overlay_nr + 1);
2231 ret = overlay_data_apply(overlay_name, &ovcs_id);
2234 unittest(0, "could not apply overlay \"%s\"\n", overlay_name);
2237 save_ovcs_id[1] = ovcs_id;
2238 of_unittest_track_overlay(ovcs_id, overlay_nr + 1);
2240 EXPECT_END(KERN_INFO,
2241 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest7/status");
2244 for (i = 0; i < 2; i++) {
2245 /* unittest device must be in after state */
2246 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
2248 unittest(0, "overlay @\"%s\" failed @\"%s\" %s\n",
2249 overlay_name_from_nr(overlay_nr + i),
2250 unittest_path(unittest_nr + i,
2252 !after ? "enabled" : "disabled");
2257 for (i = 1; i >= 0; i--) {
2258 ovcs_id = save_ovcs_id[i];
2259 if (of_overlay_remove(&ovcs_id)) {
2260 unittest(0, "%s failed destroy @\"%s\"\n",
2261 overlay_name_from_nr(overlay_nr + i),
2262 unittest_path(unittest_nr + i,
2266 of_unittest_untrack_overlay(save_ovcs_id[i]);
2269 for (i = 0; i < 2; i++) {
2270 /* unittest device must be again in before state */
2271 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
2273 unittest(0, "%s with device @\"%s\" %s\n",
2274 overlay_name_from_nr(overlay_nr + i),
2275 unittest_path(unittest_nr + i,
2277 !before ? "enabled" : "disabled");
2282 unittest(1, "overlay test %d passed\n", 6);
2286 /* test overlay application in sequence */
2287 static void __init of_unittest_overlay_8(void)
2289 int i, save_ovcs_id[2], ovcs_id;
2290 int overlay_nr = 8, unittest_nr = 8;
2291 const char *overlay_name;
2294 /* we don't care about device state in this test */
2296 EXPECT_BEGIN(KERN_INFO,
2297 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/status");
2299 overlay_name = overlay_name_from_nr(overlay_nr + 0);
2301 ret = overlay_data_apply(overlay_name, &ovcs_id);
2303 unittest(0, "could not apply overlay \"%s\"\n", overlay_name);
2305 EXPECT_END(KERN_INFO,
2306 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/status");
2311 save_ovcs_id[0] = ovcs_id;
2312 of_unittest_track_overlay(ovcs_id, overlay_nr + 0);
2314 overlay_name = overlay_name_from_nr(overlay_nr + 1);
2316 EXPECT_BEGIN(KERN_INFO,
2317 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/property-foo");
2319 /* apply the overlays */
2320 ret = overlay_data_apply(overlay_name, &ovcs_id);
2322 EXPECT_END(KERN_INFO,
2323 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/property-foo");
2326 unittest(0, "could not apply overlay \"%s\"\n", overlay_name);
2330 save_ovcs_id[1] = ovcs_id;
2331 of_unittest_track_overlay(ovcs_id, overlay_nr + 1);
2333 /* now try to remove first overlay (it should fail) */
2334 ovcs_id = save_ovcs_id[0];
2336 EXPECT_BEGIN(KERN_INFO,
2337 "OF: overlay: node_overlaps_later_cs: #6 overlaps with #7 @/testcase-data/overlay-node/test-bus/test-unittest8");
2339 EXPECT_BEGIN(KERN_INFO,
2340 "OF: overlay: overlay #6 is not topmost");
2342 ret = of_overlay_remove(&ovcs_id);
2344 EXPECT_END(KERN_INFO,
2345 "OF: overlay: overlay #6 is not topmost");
2347 EXPECT_END(KERN_INFO,
2348 "OF: overlay: node_overlaps_later_cs: #6 overlaps with #7 @/testcase-data/overlay-node/test-bus/test-unittest8");
2352 * Should never get here. If we do, expect a lot of
2353 * subsequent tracking and overlay removal related errors.
2355 unittest(0, "%s was destroyed @\"%s\"\n",
2356 overlay_name_from_nr(overlay_nr + 0),
2357 unittest_path(unittest_nr,
2362 /* removing them in order should work */
2363 for (i = 1; i >= 0; i--) {
2364 ovcs_id = save_ovcs_id[i];
2365 if (of_overlay_remove(&ovcs_id)) {
2366 unittest(0, "%s not destroyed @\"%s\"\n",
2367 overlay_name_from_nr(overlay_nr + i),
2368 unittest_path(unittest_nr,
2372 of_unittest_untrack_overlay(save_ovcs_id[i]);
2375 unittest(1, "overlay test %d passed\n", 8);
2378 /* test insertion of a bus with parent devices */
2379 static void __init of_unittest_overlay_10(void)
2384 /* device should disable */
2385 ret = of_unittest_apply_overlay_check(10, 10, 0, 1, PDEV_OVERLAY);
2387 if (unittest(ret == 0,
2388 "overlay test %d failed; overlay application\n", 10))
2391 child_path = kasprintf(GFP_KERNEL, "%s/test-unittest101",
2392 unittest_path(10, PDEV_OVERLAY));
2393 if (unittest(child_path, "overlay test %d failed; kasprintf\n", 10))
2396 ret = of_path_device_type_exists(child_path, PDEV_OVERLAY);
2399 unittest(ret, "overlay test %d failed; no child device\n", 10);
2402 /* test insertion of a bus with parent devices (and revert) */
2403 static void __init of_unittest_overlay_11(void)
2407 /* device should disable */
2408 ret = of_unittest_apply_revert_overlay_check(11, 11, 0, 1,
2411 unittest(ret == 0, "overlay test %d failed; overlay apply\n", 11);
2414 #if IS_BUILTIN(CONFIG_I2C) && IS_ENABLED(CONFIG_OF_OVERLAY)
2416 struct unittest_i2c_bus_data {
2417 struct platform_device *pdev;
2418 struct i2c_adapter adap;
2421 static int unittest_i2c_master_xfer(struct i2c_adapter *adap,
2422 struct i2c_msg *msgs, int num)
2424 struct unittest_i2c_bus_data *std = i2c_get_adapdata(adap);
2431 static u32 unittest_i2c_functionality(struct i2c_adapter *adap)
2433 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
2436 static const struct i2c_algorithm unittest_i2c_algo = {
2437 .master_xfer = unittest_i2c_master_xfer,
2438 .functionality = unittest_i2c_functionality,
2441 static int unittest_i2c_bus_probe(struct platform_device *pdev)
2443 struct device *dev = &pdev->dev;
2444 struct device_node *np = dev->of_node;
2445 struct unittest_i2c_bus_data *std;
2446 struct i2c_adapter *adap;
2450 dev_err(dev, "No OF data for device\n");
2455 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
2457 std = devm_kzalloc(dev, sizeof(*std), GFP_KERNEL);
2461 /* link them together */
2463 platform_set_drvdata(pdev, std);
2466 i2c_set_adapdata(adap, std);
2468 strscpy(adap->name, pdev->name, sizeof(adap->name));
2469 adap->class = I2C_CLASS_DEPRECATED;
2470 adap->algo = &unittest_i2c_algo;
2471 adap->dev.parent = dev;
2472 adap->dev.of_node = dev->of_node;
2473 adap->timeout = 5 * HZ;
2476 ret = i2c_add_numbered_adapter(adap);
2478 dev_err(dev, "Failed to add I2C adapter\n");
2485 static int unittest_i2c_bus_remove(struct platform_device *pdev)
2487 struct device *dev = &pdev->dev;
2488 struct device_node *np = dev->of_node;
2489 struct unittest_i2c_bus_data *std = platform_get_drvdata(pdev);
2491 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
2492 i2c_del_adapter(&std->adap);
2497 static const struct of_device_id unittest_i2c_bus_match[] = {
2498 { .compatible = "unittest-i2c-bus", },
2502 static struct platform_driver unittest_i2c_bus_driver = {
2503 .probe = unittest_i2c_bus_probe,
2504 .remove = unittest_i2c_bus_remove,
2506 .name = "unittest-i2c-bus",
2507 .of_match_table = of_match_ptr(unittest_i2c_bus_match),
2511 static int unittest_i2c_dev_probe(struct i2c_client *client,
2512 const struct i2c_device_id *id)
2514 struct device *dev = &client->dev;
2515 struct device_node *np = client->dev.of_node;
2518 dev_err(dev, "No OF node\n");
2522 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
2527 static void unittest_i2c_dev_remove(struct i2c_client *client)
2529 struct device *dev = &client->dev;
2530 struct device_node *np = client->dev.of_node;
2532 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
2535 static const struct i2c_device_id unittest_i2c_dev_id[] = {
2536 { .name = "unittest-i2c-dev" },
2540 static struct i2c_driver unittest_i2c_dev_driver = {
2542 .name = "unittest-i2c-dev",
2544 .probe = unittest_i2c_dev_probe,
2545 .remove = unittest_i2c_dev_remove,
2546 .id_table = unittest_i2c_dev_id,
2549 #if IS_BUILTIN(CONFIG_I2C_MUX)
2551 static int unittest_i2c_mux_select_chan(struct i2c_mux_core *muxc, u32 chan)
2556 static int unittest_i2c_mux_probe(struct i2c_client *client,
2557 const struct i2c_device_id *id)
2560 struct device *dev = &client->dev;
2561 struct i2c_adapter *adap = client->adapter;
2562 struct device_node *np = client->dev.of_node, *child;
2563 struct i2c_mux_core *muxc;
2566 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
2569 dev_err(dev, "No OF node\n");
2574 for_each_child_of_node(np, child) {
2575 if (of_property_read_u32(child, "reg", ®))
2577 if (max_reg == (u32)-1 || reg > max_reg)
2580 nchans = max_reg == (u32)-1 ? 0 : max_reg + 1;
2582 dev_err(dev, "No channels\n");
2586 muxc = i2c_mux_alloc(adap, dev, nchans, 0, 0,
2587 unittest_i2c_mux_select_chan, NULL);
2590 for (i = 0; i < nchans; i++) {
2591 if (i2c_mux_add_adapter(muxc, 0, i, 0)) {
2592 dev_err(dev, "Failed to register mux #%d\n", i);
2593 i2c_mux_del_adapters(muxc);
2598 i2c_set_clientdata(client, muxc);
2603 static void unittest_i2c_mux_remove(struct i2c_client *client)
2605 struct device *dev = &client->dev;
2606 struct device_node *np = client->dev.of_node;
2607 struct i2c_mux_core *muxc = i2c_get_clientdata(client);
2609 dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
2610 i2c_mux_del_adapters(muxc);
2613 static const struct i2c_device_id unittest_i2c_mux_id[] = {
2614 { .name = "unittest-i2c-mux" },
2618 static struct i2c_driver unittest_i2c_mux_driver = {
2620 .name = "unittest-i2c-mux",
2622 .probe = unittest_i2c_mux_probe,
2623 .remove = unittest_i2c_mux_remove,
2624 .id_table = unittest_i2c_mux_id,
2629 static int of_unittest_overlay_i2c_init(void)
2633 ret = i2c_add_driver(&unittest_i2c_dev_driver);
2634 if (unittest(ret == 0,
2635 "could not register unittest i2c device driver\n"))
2638 ret = platform_driver_register(&unittest_i2c_bus_driver);
2640 if (unittest(ret == 0,
2641 "could not register unittest i2c bus driver\n"))
2644 #if IS_BUILTIN(CONFIG_I2C_MUX)
2646 EXPECT_BEGIN(KERN_INFO,
2647 "i2c i2c-1: Added multiplexed i2c bus 2");
2649 ret = i2c_add_driver(&unittest_i2c_mux_driver);
2651 EXPECT_END(KERN_INFO,
2652 "i2c i2c-1: Added multiplexed i2c bus 2");
2654 if (unittest(ret == 0,
2655 "could not register unittest i2c mux driver\n"))
2662 static void of_unittest_overlay_i2c_cleanup(void)
2664 #if IS_BUILTIN(CONFIG_I2C_MUX)
2665 i2c_del_driver(&unittest_i2c_mux_driver);
2667 platform_driver_unregister(&unittest_i2c_bus_driver);
2668 i2c_del_driver(&unittest_i2c_dev_driver);
2671 static void __init of_unittest_overlay_i2c_12(void)
2675 /* device should enable */
2676 EXPECT_BEGIN(KERN_INFO,
2677 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest12/status");
2679 ret = of_unittest_apply_overlay_check(12, 12, 0, 1, I2C_OVERLAY);
2681 EXPECT_END(KERN_INFO,
2682 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest12/status");
2687 unittest(1, "overlay test %d passed\n", 12);
2690 /* test deactivation of device */
2691 static void __init of_unittest_overlay_i2c_13(void)
2695 EXPECT_BEGIN(KERN_INFO,
2696 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest13/status");
2698 /* device should disable */
2699 ret = of_unittest_apply_overlay_check(13, 13, 1, 0, I2C_OVERLAY);
2701 EXPECT_END(KERN_INFO,
2702 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest13/status");
2707 unittest(1, "overlay test %d passed\n", 13);
2710 /* just check for i2c mux existence */
2711 static void of_unittest_overlay_i2c_14(void)
2715 static void __init of_unittest_overlay_i2c_15(void)
2719 /* device should enable */
2720 EXPECT_BEGIN(KERN_INFO,
2721 "i2c i2c-1: Added multiplexed i2c bus 3");
2723 ret = of_unittest_apply_overlay_check(15, 15, 0, 1, I2C_OVERLAY);
2725 EXPECT_END(KERN_INFO,
2726 "i2c i2c-1: Added multiplexed i2c bus 3");
2731 unittest(1, "overlay test %d passed\n", 15);
2736 static inline void of_unittest_overlay_i2c_14(void) { }
2737 static inline void of_unittest_overlay_i2c_15(void) { }
2741 static int of_notify(struct notifier_block *nb, unsigned long action,
2744 struct of_overlay_notify_data *nd = arg;
2745 struct device_node *found;
2749 * For overlay_16 .. overlay_19, check that returning an error
2750 * works for each of the actions by setting an arbitrary return
2751 * error number that matches the test number. e.g. for unittest16,
2752 * ret = -EBUSY which is -16.
2754 * OVERLAY_INFO() for the overlays is declared to expect the same
2755 * error number, so overlay_data_apply() will return no error.
2757 * overlay_20 will return NOTIFY_DONE
2761 of_node_get(nd->overlay);
2765 case OF_OVERLAY_PRE_APPLY:
2766 found = of_find_node_by_name(nd->overlay, "test-unittest16");
2773 case OF_OVERLAY_POST_APPLY:
2774 found = of_find_node_by_name(nd->overlay, "test-unittest17");
2781 case OF_OVERLAY_PRE_REMOVE:
2782 found = of_find_node_by_name(nd->overlay, "test-unittest18");
2789 case OF_OVERLAY_POST_REMOVE:
2790 found = of_find_node_by_name(nd->overlay, "test-unittest19");
2797 default: /* should not happen */
2798 of_node_put(nd->overlay);
2804 return notifier_from_errno(ret);
2809 static struct notifier_block of_nb = {
2810 .notifier_call = of_notify,
2813 static void __init of_unittest_overlay_notify(void)
2818 ret = of_overlay_notifier_register(&of_nb);
2820 "of_overlay_notifier_register() failed, ret = %d\n", ret);
2825 * The overlays are applied by overlay_data_apply()
2826 * instead of of_unittest_apply_overlay() so that they
2827 * will not be tracked. Thus they will not be removed
2828 * by of_unittest_remove_tracked_overlays().
2830 * Applying overlays 16 - 19 will each trigger an error for a
2831 * different action in of_notify().
2833 * Applying overlay 20 will not trigger any error in of_notify().
2836 /* --- overlay 16 --- */
2838 EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset pre-apply notifier error -16, target: /testcase-data/overlay-node/test-bus");
2840 unittest(overlay_data_apply("overlay_16", &ovcs_id),
2841 "test OF_OVERLAY_PRE_APPLY notify injected error\n");
2843 EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset pre-apply notifier error -16, target: /testcase-data/overlay-node/test-bus");
2845 unittest(ovcs_id, "ovcs_id not created for overlay_16\n");
2847 /* --- overlay 17 --- */
2849 EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset post-apply notifier error -17, target: /testcase-data/overlay-node/test-bus");
2851 unittest(overlay_data_apply("overlay_17", &ovcs_id),
2852 "test OF_OVERLAY_POST_APPLY notify injected error\n");
2854 EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset post-apply notifier error -17, target: /testcase-data/overlay-node/test-bus");
2856 unittest(ovcs_id, "ovcs_id not created for overlay_17\n");
2859 ret = of_overlay_remove(&ovcs_id);
2861 "overlay_17 of_overlay_remove(), ret = %d\n", ret);
2864 /* --- overlay 18 --- */
2866 unittest(overlay_data_apply("overlay_18", &ovcs_id),
2867 "OF_OVERLAY_PRE_REMOVE notify injected error\n");
2869 unittest(ovcs_id, "ovcs_id not created for overlay_18\n");
2872 EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset pre-remove notifier error -18, target: /testcase-data/overlay-node/test-bus");
2874 ret = of_overlay_remove(&ovcs_id);
2875 EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset pre-remove notifier error -18, target: /testcase-data/overlay-node/test-bus");
2876 if (ret == -EXDEV) {
2878 * change set ovcs_id should still exist
2880 unittest(1, "overlay_18 of_overlay_remove() injected error for OF_OVERLAY_PRE_REMOVE\n");
2882 unittest(0, "overlay_18 of_overlay_remove() injected error for OF_OVERLAY_PRE_REMOVE not returned\n");
2885 unittest(1, "ovcs_id not created for overlay_18\n");
2888 unittest(ovcs_id, "ovcs_id removed for overlay_18\n");
2890 /* --- overlay 19 --- */
2892 unittest(overlay_data_apply("overlay_19", &ovcs_id),
2893 "OF_OVERLAY_POST_REMOVE notify injected error\n");
2895 unittest(ovcs_id, "ovcs_id not created for overlay_19\n");
2898 EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset post-remove notifier error -19, target: /testcase-data/overlay-node/test-bus");
2899 ret = of_overlay_remove(&ovcs_id);
2900 EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset post-remove notifier error -19, target: /testcase-data/overlay-node/test-bus");
2902 unittest(1, "overlay_19 of_overlay_remove() injected error for OF_OVERLAY_POST_REMOVE\n");
2904 unittest(0, "overlay_19 of_overlay_remove() injected error for OF_OVERLAY_POST_REMOVE not returned\n");
2906 unittest(1, "ovcs_id removed for overlay_19\n");
2909 unittest(!ovcs_id, "changeset ovcs_id = %d not removed for overlay_19\n",
2912 /* --- overlay 20 --- */
2914 unittest(overlay_data_apply("overlay_20", &ovcs_id),
2915 "overlay notify no injected error\n");
2918 ret = of_overlay_remove(&ovcs_id);
2920 unittest(1, "overlay_20 failed to be destroyed, ret = %d\n",
2923 unittest(1, "ovcs_id not created for overlay_20\n");
2926 unittest(!of_overlay_notifier_unregister(&of_nb),
2927 "of_overlay_notifier_unregister() failed, ret = %d\n", ret);
2930 static void __init of_unittest_overlay(void)
2932 struct device_node *bus_np = NULL;
2934 if (platform_driver_register(&unittest_driver)) {
2935 unittest(0, "could not register unittest driver\n");
2939 bus_np = of_find_node_by_path(bus_path);
2940 if (bus_np == NULL) {
2941 unittest(0, "could not find bus_path \"%s\"\n", bus_path);
2945 if (of_platform_default_populate(bus_np, NULL, NULL)) {
2946 unittest(0, "could not populate bus @ \"%s\"\n", bus_path);
2950 if (!of_unittest_device_exists(100, PDEV_OVERLAY)) {
2951 unittest(0, "could not find unittest0 @ \"%s\"\n",
2952 unittest_path(100, PDEV_OVERLAY));
2956 if (of_unittest_device_exists(101, PDEV_OVERLAY)) {
2957 unittest(0, "unittest1 @ \"%s\" should not exist\n",
2958 unittest_path(101, PDEV_OVERLAY));
2962 unittest(1, "basic infrastructure of overlays passed");
2964 /* tests in sequence */
2965 of_unittest_overlay_0();
2966 of_unittest_overlay_1();
2967 of_unittest_overlay_2();
2968 of_unittest_overlay_3();
2969 of_unittest_overlay_4();
2970 of_unittest_overlay_5();
2971 of_unittest_overlay_6();
2972 of_unittest_overlay_8();
2974 of_unittest_overlay_10();
2975 of_unittest_overlay_11();
2977 #if IS_BUILTIN(CONFIG_I2C)
2978 if (unittest(of_unittest_overlay_i2c_init() == 0, "i2c init failed\n"))
2981 of_unittest_overlay_i2c_12();
2982 of_unittest_overlay_i2c_13();
2983 of_unittest_overlay_i2c_14();
2984 of_unittest_overlay_i2c_15();
2986 of_unittest_overlay_i2c_cleanup();
2989 of_unittest_overlay_gpio();
2991 of_unittest_remove_tracked_overlays();
2993 of_unittest_overlay_notify();
2996 of_node_put(bus_np);
3000 static inline void __init of_unittest_overlay(void) { }
3003 #ifdef CONFIG_OF_OVERLAY
3006 * __dtb_ot_begin[] and __dtb_ot_end[] are created by cmd_dt_S_dtb
3007 * in scripts/Makefile.lib
3010 #define OVERLAY_INFO_EXTERN(name) \
3011 extern uint8_t __dtb_##name##_begin[]; \
3012 extern uint8_t __dtb_##name##_end[]
3014 #define OVERLAY_INFO(overlay_name, expected) \
3015 { .dtb_begin = __dtb_##overlay_name##_begin, \
3016 .dtb_end = __dtb_##overlay_name##_end, \
3017 .expected_result = expected, \
3018 .name = #overlay_name, \
3021 struct overlay_info {
3024 int expected_result;
3029 OVERLAY_INFO_EXTERN(overlay_base);
3030 OVERLAY_INFO_EXTERN(overlay);
3031 OVERLAY_INFO_EXTERN(overlay_0);
3032 OVERLAY_INFO_EXTERN(overlay_1);
3033 OVERLAY_INFO_EXTERN(overlay_2);
3034 OVERLAY_INFO_EXTERN(overlay_3);
3035 OVERLAY_INFO_EXTERN(overlay_4);
3036 OVERLAY_INFO_EXTERN(overlay_5);
3037 OVERLAY_INFO_EXTERN(overlay_6);
3038 OVERLAY_INFO_EXTERN(overlay_7);
3039 OVERLAY_INFO_EXTERN(overlay_8);
3040 OVERLAY_INFO_EXTERN(overlay_9);
3041 OVERLAY_INFO_EXTERN(overlay_10);
3042 OVERLAY_INFO_EXTERN(overlay_11);
3043 OVERLAY_INFO_EXTERN(overlay_12);
3044 OVERLAY_INFO_EXTERN(overlay_13);
3045 OVERLAY_INFO_EXTERN(overlay_15);
3046 OVERLAY_INFO_EXTERN(overlay_16);
3047 OVERLAY_INFO_EXTERN(overlay_17);
3048 OVERLAY_INFO_EXTERN(overlay_18);
3049 OVERLAY_INFO_EXTERN(overlay_19);
3050 OVERLAY_INFO_EXTERN(overlay_20);
3051 OVERLAY_INFO_EXTERN(overlay_gpio_01);
3052 OVERLAY_INFO_EXTERN(overlay_gpio_02a);
3053 OVERLAY_INFO_EXTERN(overlay_gpio_02b);
3054 OVERLAY_INFO_EXTERN(overlay_gpio_03);
3055 OVERLAY_INFO_EXTERN(overlay_gpio_04a);
3056 OVERLAY_INFO_EXTERN(overlay_gpio_04b);
3057 OVERLAY_INFO_EXTERN(overlay_bad_add_dup_node);
3058 OVERLAY_INFO_EXTERN(overlay_bad_add_dup_prop);
3059 OVERLAY_INFO_EXTERN(overlay_bad_phandle);
3060 OVERLAY_INFO_EXTERN(overlay_bad_symbol);
3062 /* entries found by name */
3063 static struct overlay_info overlays[] = {
3064 OVERLAY_INFO(overlay_base, -9999),
3065 OVERLAY_INFO(overlay, 0),
3066 OVERLAY_INFO(overlay_0, 0),
3067 OVERLAY_INFO(overlay_1, 0),
3068 OVERLAY_INFO(overlay_2, 0),
3069 OVERLAY_INFO(overlay_3, 0),
3070 OVERLAY_INFO(overlay_4, 0),
3071 OVERLAY_INFO(overlay_5, 0),
3072 OVERLAY_INFO(overlay_6, 0),
3073 OVERLAY_INFO(overlay_7, 0),
3074 OVERLAY_INFO(overlay_8, 0),
3075 OVERLAY_INFO(overlay_9, 0),
3076 OVERLAY_INFO(overlay_10, 0),
3077 OVERLAY_INFO(overlay_11, 0),
3078 OVERLAY_INFO(overlay_12, 0),
3079 OVERLAY_INFO(overlay_13, 0),
3080 OVERLAY_INFO(overlay_15, 0),
3081 OVERLAY_INFO(overlay_16, -EBUSY),
3082 OVERLAY_INFO(overlay_17, -EEXIST),
3083 OVERLAY_INFO(overlay_18, 0),
3084 OVERLAY_INFO(overlay_19, 0),
3085 OVERLAY_INFO(overlay_20, 0),
3086 OVERLAY_INFO(overlay_gpio_01, 0),
3087 OVERLAY_INFO(overlay_gpio_02a, 0),
3088 OVERLAY_INFO(overlay_gpio_02b, 0),
3089 OVERLAY_INFO(overlay_gpio_03, 0),
3090 OVERLAY_INFO(overlay_gpio_04a, 0),
3091 OVERLAY_INFO(overlay_gpio_04b, 0),
3092 OVERLAY_INFO(overlay_bad_add_dup_node, -EINVAL),
3093 OVERLAY_INFO(overlay_bad_add_dup_prop, -EINVAL),
3094 OVERLAY_INFO(overlay_bad_phandle, -EINVAL),
3095 OVERLAY_INFO(overlay_bad_symbol, -EINVAL),
3097 {.dtb_begin = NULL, .dtb_end = NULL, .expected_result = 0, .name = NULL}
3100 static struct device_node *overlay_base_root;
3102 static void * __init dt_alloc_memory(u64 size, u64 align)
3104 void *ptr = memblock_alloc(size, align);
3107 panic("%s: Failed to allocate %llu bytes align=0x%llx\n",
3108 __func__, size, align);
3114 * Create base device tree for the overlay unittest.
3116 * This is called from very early boot code.
3118 * Do as much as possible the same way as done in __unflatten_device_tree
3119 * and other early boot steps for the normal FDT so that the overlay base
3120 * unflattened tree will have the same characteristics as the real tree
3121 * (such as having memory allocated by the early allocator). The goal
3122 * is to test "the real thing" as much as possible, and test "test setup
3123 * code" as little as possible.
3125 * Have to stop before resolving phandles, because that uses kmalloc.
3127 void __init unittest_unflatten_overlay_base(void)
3129 struct overlay_info *info;
3134 const char *overlay_name = "overlay_base";
3136 for (info = overlays; info && info->name; info++) {
3137 if (!strcmp(overlay_name, info->name)) {
3143 pr_err("no overlay data for %s\n", overlay_name);
3147 info = &overlays[0];
3149 if (info->expected_result != -9999) {
3150 pr_err("No dtb 'overlay_base' to attach\n");
3154 data_size = info->dtb_end - info->dtb_begin;
3156 pr_err("No dtb 'overlay_base' to attach\n");
3160 size = fdt_totalsize(info->dtb_begin);
3161 if (size != data_size) {
3162 pr_err("dtb 'overlay_base' header totalsize != actual size");
3166 new_fdt = dt_alloc_memory(size, roundup_pow_of_two(FDT_V17_SIZE));
3168 pr_err("alloc for dtb 'overlay_base' failed");
3172 memcpy(new_fdt, info->dtb_begin, size);
3174 __unflatten_device_tree(new_fdt, NULL, &overlay_base_root,
3175 dt_alloc_memory, true);
3179 * The purpose of of_unittest_overlay_data_add is to add an
3180 * overlay in the normal fashion. This is a test of the whole
3181 * picture, instead of testing individual elements.
3183 * A secondary purpose is to be able to verify that the contents of
3184 * /proc/device-tree/ contains the updated structure and values from
3185 * the overlay. That must be verified separately in user space.
3187 * Return 0 on unexpected error.
3189 static int __init overlay_data_apply(const char *overlay_name, int *ovcs_id)
3191 struct overlay_info *info;
3196 for (info = overlays; info && info->name; info++) {
3197 if (!strcmp(overlay_name, info->name)) {
3203 pr_err("no overlay data for %s\n", overlay_name);
3207 size = info->dtb_end - info->dtb_begin;
3209 pr_err("no overlay data for %s\n", overlay_name);
3211 ret = of_overlay_fdt_apply(info->dtb_begin, size, &info->ovcs_id);
3213 *ovcs_id = info->ovcs_id;
3217 pr_debug("%s applied\n", overlay_name);
3220 if (ret != info->expected_result)
3221 pr_err("of_overlay_fdt_apply() expected %d, ret=%d, %s\n",
3222 info->expected_result, ret, overlay_name);
3224 return (ret == info->expected_result);
3228 * The purpose of of_unittest_overlay_high_level is to add an overlay
3229 * in the normal fashion. This is a test of the whole picture,
3230 * instead of individual elements.
3232 * The first part of the function is _not_ normal overlay usage; it is
3233 * finishing splicing the base overlay device tree into the live tree.
3235 static __init void of_unittest_overlay_high_level(void)
3237 struct device_node *last_sibling;
3238 struct device_node *np;
3239 struct device_node *of_symbols;
3240 struct device_node *overlay_base_symbols;
3241 struct device_node **pprev;
3242 struct property *prop;
3245 if (!overlay_base_root) {
3246 unittest(0, "overlay_base_root not initialized\n");
3251 * Could not fixup phandles in unittest_unflatten_overlay_base()
3252 * because kmalloc() was not yet available.
3254 of_overlay_mutex_lock();
3255 of_resolve_phandles(overlay_base_root);
3256 of_overlay_mutex_unlock();
3260 * do not allow overlay_base to duplicate any node already in
3261 * tree, this greatly simplifies the code
3265 * remove overlay_base_root node "__local_fixups", after
3266 * being used by of_resolve_phandles()
3268 pprev = &overlay_base_root->child;
3269 for (np = overlay_base_root->child; np; np = np->sibling) {
3270 if (of_node_name_eq(np, "__local_fixups__")) {
3271 *pprev = np->sibling;
3274 pprev = &np->sibling;
3277 /* remove overlay_base_root node "__symbols__" if in live tree */
3278 of_symbols = of_get_child_by_name(of_root, "__symbols__");
3280 /* will have to graft properties from node into live tree */
3281 pprev = &overlay_base_root->child;
3282 for (np = overlay_base_root->child; np; np = np->sibling) {
3283 if (of_node_name_eq(np, "__symbols__")) {
3284 overlay_base_symbols = np;
3285 *pprev = np->sibling;
3288 pprev = &np->sibling;
3292 for_each_child_of_node(overlay_base_root, np) {
3293 struct device_node *base_child;
3294 for_each_child_of_node(of_root, base_child) {
3295 if (!strcmp(np->full_name, base_child->full_name)) {
3296 unittest(0, "illegal node name in overlay_base %pOFn",
3299 of_node_put(base_child);
3306 * overlay 'overlay_base' is not allowed to have root
3307 * properties, so only need to splice nodes into main device tree.
3309 * root node of *overlay_base_root will not be freed, it is lost
3313 for (np = overlay_base_root->child; np; np = np->sibling)
3314 np->parent = of_root;
3316 mutex_lock(&of_mutex);
3318 for (last_sibling = np = of_root->child; np; np = np->sibling)
3322 last_sibling->sibling = overlay_base_root->child;
3324 of_root->child = overlay_base_root->child;
3326 for_each_of_allnodes_from(overlay_base_root, np)
3327 __of_attach_node_sysfs(np);
3330 struct property *new_prop;
3331 for_each_property_of_node(overlay_base_symbols, prop) {
3333 new_prop = __of_prop_dup(prop, GFP_KERNEL);
3335 unittest(0, "__of_prop_dup() of '%s' from overlay_base node __symbols__",
3339 if (__of_add_property(of_symbols, new_prop)) {
3340 kfree(new_prop->name);
3341 kfree(new_prop->value);
3343 /* "name" auto-generated by unflatten */
3344 if (!strcmp(prop->name, "name"))
3346 unittest(0, "duplicate property '%s' in overlay_base node __symbols__",
3350 if (__of_add_property_sysfs(of_symbols, new_prop)) {
3351 unittest(0, "unable to add property '%s' in overlay_base node __symbols__ to sysfs",
3358 mutex_unlock(&of_mutex);
3361 /* now do the normal overlay usage test */
3363 EXPECT_BEGIN(KERN_ERR,
3364 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/substation@100/status");
3365 EXPECT_BEGIN(KERN_ERR,
3366 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/status");
3367 EXPECT_BEGIN(KERN_ERR,
3368 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@30/incline-up");
3369 EXPECT_BEGIN(KERN_ERR,
3370 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@40/incline-up");
3371 EXPECT_BEGIN(KERN_ERR,
3372 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/status");
3373 EXPECT_BEGIN(KERN_ERR,
3374 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/color");
3375 EXPECT_BEGIN(KERN_ERR,
3376 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/rate");
3377 EXPECT_BEGIN(KERN_ERR,
3378 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/hvac_2");
3379 EXPECT_BEGIN(KERN_ERR,
3380 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200");
3381 EXPECT_BEGIN(KERN_ERR,
3382 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_left");
3383 EXPECT_BEGIN(KERN_ERR,
3384 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_right");
3386 ret = overlay_data_apply("overlay", NULL);
3388 EXPECT_END(KERN_ERR,
3389 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_right");
3390 EXPECT_END(KERN_ERR,
3391 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_left");
3392 EXPECT_END(KERN_ERR,
3393 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200");
3394 EXPECT_END(KERN_ERR,
3395 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/hvac_2");
3396 EXPECT_END(KERN_ERR,
3397 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/rate");
3398 EXPECT_END(KERN_ERR,
3399 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/color");
3400 EXPECT_END(KERN_ERR,
3401 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/status");
3402 EXPECT_END(KERN_ERR,
3403 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@40/incline-up");
3404 EXPECT_END(KERN_ERR,
3405 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@30/incline-up");
3406 EXPECT_END(KERN_ERR,
3407 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/status");
3408 EXPECT_END(KERN_ERR,
3409 "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/substation@100/status");
3411 unittest(ret, "Adding overlay 'overlay' failed\n");
3413 EXPECT_BEGIN(KERN_ERR,
3414 "OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/controller");
3415 EXPECT_BEGIN(KERN_ERR,
3416 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/controller/name");
3418 unittest(overlay_data_apply("overlay_bad_add_dup_node", NULL),
3419 "Adding overlay 'overlay_bad_add_dup_node' failed\n");
3421 EXPECT_END(KERN_ERR,
3422 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/controller/name");
3423 EXPECT_END(KERN_ERR,
3424 "OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/controller");
3426 EXPECT_BEGIN(KERN_ERR,
3427 "OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/electric");
3428 EXPECT_BEGIN(KERN_ERR,
3429 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/rpm_avail");
3430 EXPECT_BEGIN(KERN_ERR,
3431 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/name");
3433 unittest(overlay_data_apply("overlay_bad_add_dup_prop", NULL),
3434 "Adding overlay 'overlay_bad_add_dup_prop' failed\n");
3436 EXPECT_END(KERN_ERR,
3437 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/name");
3438 EXPECT_END(KERN_ERR,
3439 "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/rpm_avail");
3440 EXPECT_END(KERN_ERR,
3441 "OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/electric");
3443 unittest(overlay_data_apply("overlay_bad_phandle", NULL),
3444 "Adding overlay 'overlay_bad_phandle' failed\n");
3446 unittest(overlay_data_apply("overlay_bad_symbol", NULL),
3447 "Adding overlay 'overlay_bad_symbol' failed\n");
3452 mutex_unlock(&of_mutex);
3457 static inline __init void of_unittest_overlay_high_level(void) {}
3461 static int __init of_unittest(void)
3463 struct device_node *np;
3466 pr_info("start of unittest - you will see error messages\n");
3468 /* Taint the kernel so we know we've run tests. */
3469 add_taint(TAINT_TEST, LOCKDEP_STILL_OK);
3471 /* adding data for unittest */
3473 if (IS_ENABLED(CONFIG_UML))
3474 unittest_unflatten_overlay_base();
3476 res = unittest_data_add();
3480 of_aliases = of_find_node_by_path("/aliases");
3482 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
3484 pr_info("No testcase data in device tree; not running tests\n");
3489 of_unittest_check_tree_linkage();
3490 of_unittest_check_phandles();
3491 of_unittest_find_node_by_name();
3492 of_unittest_dynamic();
3493 of_unittest_parse_phandle_with_args();
3494 of_unittest_parse_phandle_with_args_map();
3495 of_unittest_printf();
3496 of_unittest_property_string();
3497 of_unittest_property_copy();
3498 of_unittest_changeset();
3499 of_unittest_parse_interrupts();
3500 of_unittest_parse_interrupts_extended();
3501 of_unittest_dma_get_max_cpu_address();
3502 of_unittest_parse_dma_ranges();
3503 of_unittest_pci_dma_ranges();
3504 of_unittest_match_node();
3505 of_unittest_platform_populate();
3506 of_unittest_overlay();
3508 /* Double check linkage after removing testcase data */
3509 of_unittest_check_tree_linkage();
3511 of_unittest_overlay_high_level();
3513 pr_info("end of unittest - %i passed, %i failed\n",
3514 unittest_results.passed, unittest_results.failed);
3518 late_initcall(of_unittest);