xref: /openbmc/linux/drivers/of/unittest.c (revision abfbd895)
1 /*
2  * Self tests for device tree subsystem
3  */
4 
5 #define pr_fmt(fmt) "### dt-test ### " fmt
6 
7 #include <linux/clk.h>
8 #include <linux/err.h>
9 #include <linux/errno.h>
10 #include <linux/hashtable.h>
11 #include <linux/module.h>
12 #include <linux/of.h>
13 #include <linux/of_fdt.h>
14 #include <linux/of_irq.h>
15 #include <linux/of_platform.h>
16 #include <linux/list.h>
17 #include <linux/mutex.h>
18 #include <linux/slab.h>
19 #include <linux/device.h>
20 #include <linux/platform_device.h>
21 #include <linux/of_platform.h>
22 
23 #include <linux/i2c.h>
24 #include <linux/i2c-mux.h>
25 
26 #include <linux/bitops.h>
27 
28 #include "of_private.h"
29 
30 static struct unittest_results {
31 	int passed;
32 	int failed;
33 } unittest_results;
34 
35 #define unittest(result, fmt, ...) ({ \
36 	bool failed = !(result); \
37 	if (failed) { \
38 		unittest_results.failed++; \
39 		pr_err("FAIL %s():%i " fmt, __func__, __LINE__, ##__VA_ARGS__); \
40 	} else { \
41 		unittest_results.passed++; \
42 		pr_debug("pass %s():%i\n", __func__, __LINE__); \
43 	} \
44 	failed; \
45 })
46 
47 static void __init of_unittest_find_node_by_name(void)
48 {
49 	struct device_node *np;
50 	const char *options;
51 
52 	np = of_find_node_by_path("/testcase-data");
53 	unittest(np && !strcmp("/testcase-data", np->full_name),
54 		"find /testcase-data failed\n");
55 	of_node_put(np);
56 
57 	/* Test if trailing '/' works */
58 	np = of_find_node_by_path("/testcase-data/");
59 	unittest(!np, "trailing '/' on /testcase-data/ should fail\n");
60 
61 	np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
62 	unittest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", np->full_name),
63 		"find /testcase-data/phandle-tests/consumer-a failed\n");
64 	of_node_put(np);
65 
66 	np = of_find_node_by_path("testcase-alias");
67 	unittest(np && !strcmp("/testcase-data", np->full_name),
68 		"find testcase-alias failed\n");
69 	of_node_put(np);
70 
71 	/* Test if trailing '/' works on aliases */
72 	np = of_find_node_by_path("testcase-alias/");
73 	unittest(!np, "trailing '/' on testcase-alias/ should fail\n");
74 
75 	np = of_find_node_by_path("testcase-alias/phandle-tests/consumer-a");
76 	unittest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", np->full_name),
77 		"find testcase-alias/phandle-tests/consumer-a failed\n");
78 	of_node_put(np);
79 
80 	np = of_find_node_by_path("/testcase-data/missing-path");
81 	unittest(!np, "non-existent path returned node %s\n", np->full_name);
82 	of_node_put(np);
83 
84 	np = of_find_node_by_path("missing-alias");
85 	unittest(!np, "non-existent alias returned node %s\n", np->full_name);
86 	of_node_put(np);
87 
88 	np = of_find_node_by_path("testcase-alias/missing-path");
89 	unittest(!np, "non-existent alias with relative path returned node %s\n", np->full_name);
90 	of_node_put(np);
91 
92 	np = of_find_node_opts_by_path("/testcase-data:testoption", &options);
93 	unittest(np && !strcmp("testoption", options),
94 		 "option path test failed\n");
95 	of_node_put(np);
96 
97 	np = of_find_node_opts_by_path("/testcase-data:test/option", &options);
98 	unittest(np && !strcmp("test/option", options),
99 		 "option path test, subcase #1 failed\n");
100 	of_node_put(np);
101 
102 	np = of_find_node_opts_by_path("/testcase-data/testcase-device1:test/option", &options);
103 	unittest(np && !strcmp("test/option", options),
104 		 "option path test, subcase #2 failed\n");
105 	of_node_put(np);
106 
107 	np = of_find_node_opts_by_path("/testcase-data:testoption", NULL);
108 	unittest(np, "NULL option path test failed\n");
109 	of_node_put(np);
110 
111 	np = of_find_node_opts_by_path("testcase-alias:testaliasoption",
112 				       &options);
113 	unittest(np && !strcmp("testaliasoption", options),
114 		 "option alias path test failed\n");
115 	of_node_put(np);
116 
117 	np = of_find_node_opts_by_path("testcase-alias:test/alias/option",
118 				       &options);
119 	unittest(np && !strcmp("test/alias/option", options),
120 		 "option alias path test, subcase #1 failed\n");
121 	of_node_put(np);
122 
123 	np = of_find_node_opts_by_path("testcase-alias:testaliasoption", NULL);
124 	unittest(np, "NULL option alias path test failed\n");
125 	of_node_put(np);
126 
127 	options = "testoption";
128 	np = of_find_node_opts_by_path("testcase-alias", &options);
129 	unittest(np && !options, "option clearing test failed\n");
130 	of_node_put(np);
131 
132 	options = "testoption";
133 	np = of_find_node_opts_by_path("/", &options);
134 	unittest(np && !options, "option clearing root node test failed\n");
135 	of_node_put(np);
136 }
137 
138 static void __init of_unittest_dynamic(void)
139 {
140 	struct device_node *np;
141 	struct property *prop;
142 
143 	np = of_find_node_by_path("/testcase-data");
144 	if (!np) {
145 		pr_err("missing testcase data\n");
146 		return;
147 	}
148 
149 	/* Array of 4 properties for the purpose of testing */
150 	prop = kzalloc(sizeof(*prop) * 4, GFP_KERNEL);
151 	if (!prop) {
152 		unittest(0, "kzalloc() failed\n");
153 		return;
154 	}
155 
156 	/* Add a new property - should pass*/
157 	prop->name = "new-property";
158 	prop->value = "new-property-data";
159 	prop->length = strlen(prop->value);
160 	unittest(of_add_property(np, prop) == 0, "Adding a new property failed\n");
161 
162 	/* Try to add an existing property - should fail */
163 	prop++;
164 	prop->name = "new-property";
165 	prop->value = "new-property-data-should-fail";
166 	prop->length = strlen(prop->value);
167 	unittest(of_add_property(np, prop) != 0,
168 		 "Adding an existing property should have failed\n");
169 
170 	/* Try to modify an existing property - should pass */
171 	prop->value = "modify-property-data-should-pass";
172 	prop->length = strlen(prop->value);
173 	unittest(of_update_property(np, prop) == 0,
174 		 "Updating an existing property should have passed\n");
175 
176 	/* Try to modify non-existent property - should pass*/
177 	prop++;
178 	prop->name = "modify-property";
179 	prop->value = "modify-missing-property-data-should-pass";
180 	prop->length = strlen(prop->value);
181 	unittest(of_update_property(np, prop) == 0,
182 		 "Updating a missing property should have passed\n");
183 
184 	/* Remove property - should pass */
185 	unittest(of_remove_property(np, prop) == 0,
186 		 "Removing a property should have passed\n");
187 
188 	/* Adding very large property - should pass */
189 	prop++;
190 	prop->name = "large-property-PAGE_SIZEx8";
191 	prop->length = PAGE_SIZE * 8;
192 	prop->value = kzalloc(prop->length, GFP_KERNEL);
193 	unittest(prop->value != NULL, "Unable to allocate large buffer\n");
194 	if (prop->value)
195 		unittest(of_add_property(np, prop) == 0,
196 			 "Adding a large property should have passed\n");
197 }
198 
199 static int __init of_unittest_check_node_linkage(struct device_node *np)
200 {
201 	struct device_node *child;
202 	int count = 0, rc;
203 
204 	for_each_child_of_node(np, child) {
205 		if (child->parent != np) {
206 			pr_err("Child node %s links to wrong parent %s\n",
207 				 child->name, np->name);
208 			rc = -EINVAL;
209 			goto put_child;
210 		}
211 
212 		rc = of_unittest_check_node_linkage(child);
213 		if (rc < 0)
214 			goto put_child;
215 		count += rc;
216 	}
217 
218 	return count + 1;
219 put_child:
220 	of_node_put(child);
221 	return rc;
222 }
223 
224 static void __init of_unittest_check_tree_linkage(void)
225 {
226 	struct device_node *np;
227 	int allnode_count = 0, child_count;
228 
229 	if (!of_root)
230 		return;
231 
232 	for_each_of_allnodes(np)
233 		allnode_count++;
234 	child_count = of_unittest_check_node_linkage(of_root);
235 
236 	unittest(child_count > 0, "Device node data structure is corrupted\n");
237 	unittest(child_count == allnode_count,
238 		 "allnodes list size (%i) doesn't match sibling lists size (%i)\n",
239 		 allnode_count, child_count);
240 	pr_debug("allnodes list size (%i); sibling lists size (%i)\n", allnode_count, child_count);
241 }
242 
243 struct node_hash {
244 	struct hlist_node node;
245 	struct device_node *np;
246 };
247 
248 static DEFINE_HASHTABLE(phandle_ht, 8);
249 static void __init of_unittest_check_phandles(void)
250 {
251 	struct device_node *np;
252 	struct node_hash *nh;
253 	struct hlist_node *tmp;
254 	int i, dup_count = 0, phandle_count = 0;
255 
256 	for_each_of_allnodes(np) {
257 		if (!np->phandle)
258 			continue;
259 
260 		hash_for_each_possible(phandle_ht, nh, node, np->phandle) {
261 			if (nh->np->phandle == np->phandle) {
262 				pr_info("Duplicate phandle! %i used by %s and %s\n",
263 					np->phandle, nh->np->full_name, np->full_name);
264 				dup_count++;
265 				break;
266 			}
267 		}
268 
269 		nh = kzalloc(sizeof(*nh), GFP_KERNEL);
270 		if (WARN_ON(!nh))
271 			return;
272 
273 		nh->np = np;
274 		hash_add(phandle_ht, &nh->node, np->phandle);
275 		phandle_count++;
276 	}
277 	unittest(dup_count == 0, "Found %i duplicates in %i phandles\n",
278 		 dup_count, phandle_count);
279 
280 	/* Clean up */
281 	hash_for_each_safe(phandle_ht, i, tmp, nh, node) {
282 		hash_del(&nh->node);
283 		kfree(nh);
284 	}
285 }
286 
287 static void __init of_unittest_parse_phandle_with_args(void)
288 {
289 	struct device_node *np;
290 	struct of_phandle_args args;
291 	int i, rc;
292 
293 	np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
294 	if (!np) {
295 		pr_err("missing testcase data\n");
296 		return;
297 	}
298 
299 	rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
300 	unittest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc);
301 
302 	for (i = 0; i < 8; i++) {
303 		bool passed = true;
304 
305 		rc = of_parse_phandle_with_args(np, "phandle-list",
306 						"#phandle-cells", i, &args);
307 
308 		/* Test the values from tests-phandle.dtsi */
309 		switch (i) {
310 		case 0:
311 			passed &= !rc;
312 			passed &= (args.args_count == 1);
313 			passed &= (args.args[0] == (i + 1));
314 			break;
315 		case 1:
316 			passed &= !rc;
317 			passed &= (args.args_count == 2);
318 			passed &= (args.args[0] == (i + 1));
319 			passed &= (args.args[1] == 0);
320 			break;
321 		case 2:
322 			passed &= (rc == -ENOENT);
323 			break;
324 		case 3:
325 			passed &= !rc;
326 			passed &= (args.args_count == 3);
327 			passed &= (args.args[0] == (i + 1));
328 			passed &= (args.args[1] == 4);
329 			passed &= (args.args[2] == 3);
330 			break;
331 		case 4:
332 			passed &= !rc;
333 			passed &= (args.args_count == 2);
334 			passed &= (args.args[0] == (i + 1));
335 			passed &= (args.args[1] == 100);
336 			break;
337 		case 5:
338 			passed &= !rc;
339 			passed &= (args.args_count == 0);
340 			break;
341 		case 6:
342 			passed &= !rc;
343 			passed &= (args.args_count == 1);
344 			passed &= (args.args[0] == (i + 1));
345 			break;
346 		case 7:
347 			passed &= (rc == -ENOENT);
348 			break;
349 		default:
350 			passed = false;
351 		}
352 
353 		unittest(passed, "index %i - data error on node %s rc=%i\n",
354 			 i, args.np->full_name, rc);
355 	}
356 
357 	/* Check for missing list property */
358 	rc = of_parse_phandle_with_args(np, "phandle-list-missing",
359 					"#phandle-cells", 0, &args);
360 	unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
361 	rc = of_count_phandle_with_args(np, "phandle-list-missing",
362 					"#phandle-cells");
363 	unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
364 
365 	/* Check for missing cells property */
366 	rc = of_parse_phandle_with_args(np, "phandle-list",
367 					"#phandle-cells-missing", 0, &args);
368 	unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
369 	rc = of_count_phandle_with_args(np, "phandle-list",
370 					"#phandle-cells-missing");
371 	unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
372 
373 	/* Check for bad phandle in list */
374 	rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle",
375 					"#phandle-cells", 0, &args);
376 	unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
377 	rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle",
378 					"#phandle-cells");
379 	unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
380 
381 	/* Check for incorrectly formed argument list */
382 	rc = of_parse_phandle_with_args(np, "phandle-list-bad-args",
383 					"#phandle-cells", 1, &args);
384 	unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
385 	rc = of_count_phandle_with_args(np, "phandle-list-bad-args",
386 					"#phandle-cells");
387 	unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
388 }
389 
390 static void __init of_unittest_property_string(void)
391 {
392 	const char *strings[4];
393 	struct device_node *np;
394 	int rc;
395 
396 	np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
397 	if (!np) {
398 		pr_err("No testcase data in device tree\n");
399 		return;
400 	}
401 
402 	rc = of_property_match_string(np, "phandle-list-names", "first");
403 	unittest(rc == 0, "first expected:0 got:%i\n", rc);
404 	rc = of_property_match_string(np, "phandle-list-names", "second");
405 	unittest(rc == 1, "second expected:1 got:%i\n", rc);
406 	rc = of_property_match_string(np, "phandle-list-names", "third");
407 	unittest(rc == 2, "third expected:2 got:%i\n", rc);
408 	rc = of_property_match_string(np, "phandle-list-names", "fourth");
409 	unittest(rc == -ENODATA, "unmatched string; rc=%i\n", rc);
410 	rc = of_property_match_string(np, "missing-property", "blah");
411 	unittest(rc == -EINVAL, "missing property; rc=%i\n", rc);
412 	rc = of_property_match_string(np, "empty-property", "blah");
413 	unittest(rc == -ENODATA, "empty property; rc=%i\n", rc);
414 	rc = of_property_match_string(np, "unterminated-string", "blah");
415 	unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
416 
417 	/* of_property_count_strings() tests */
418 	rc = of_property_count_strings(np, "string-property");
419 	unittest(rc == 1, "Incorrect string count; rc=%i\n", rc);
420 	rc = of_property_count_strings(np, "phandle-list-names");
421 	unittest(rc == 3, "Incorrect string count; rc=%i\n", rc);
422 	rc = of_property_count_strings(np, "unterminated-string");
423 	unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
424 	rc = of_property_count_strings(np, "unterminated-string-list");
425 	unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
426 
427 	/* of_property_read_string_index() tests */
428 	rc = of_property_read_string_index(np, "string-property", 0, strings);
429 	unittest(rc == 0 && !strcmp(strings[0], "foobar"), "of_property_read_string_index() failure; rc=%i\n", rc);
430 	strings[0] = NULL;
431 	rc = of_property_read_string_index(np, "string-property", 1, strings);
432 	unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
433 	rc = of_property_read_string_index(np, "phandle-list-names", 0, strings);
434 	unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
435 	rc = of_property_read_string_index(np, "phandle-list-names", 1, strings);
436 	unittest(rc == 0 && !strcmp(strings[0], "second"), "of_property_read_string_index() failure; rc=%i\n", rc);
437 	rc = of_property_read_string_index(np, "phandle-list-names", 2, strings);
438 	unittest(rc == 0 && !strcmp(strings[0], "third"), "of_property_read_string_index() failure; rc=%i\n", rc);
439 	strings[0] = NULL;
440 	rc = of_property_read_string_index(np, "phandle-list-names", 3, strings);
441 	unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
442 	strings[0] = NULL;
443 	rc = of_property_read_string_index(np, "unterminated-string", 0, strings);
444 	unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
445 	rc = of_property_read_string_index(np, "unterminated-string-list", 0, strings);
446 	unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
447 	strings[0] = NULL;
448 	rc = of_property_read_string_index(np, "unterminated-string-list", 2, strings); /* should fail */
449 	unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
450 	strings[1] = NULL;
451 
452 	/* of_property_read_string_array() tests */
453 	rc = of_property_read_string_array(np, "string-property", strings, 4);
454 	unittest(rc == 1, "Incorrect string count; rc=%i\n", rc);
455 	rc = of_property_read_string_array(np, "phandle-list-names", strings, 4);
456 	unittest(rc == 3, "Incorrect string count; rc=%i\n", rc);
457 	rc = of_property_read_string_array(np, "unterminated-string", strings, 4);
458 	unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
459 	/* -- An incorrectly formed string should cause a failure */
460 	rc = of_property_read_string_array(np, "unterminated-string-list", strings, 4);
461 	unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
462 	/* -- parsing the correctly formed strings should still work: */
463 	strings[2] = NULL;
464 	rc = of_property_read_string_array(np, "unterminated-string-list", strings, 2);
465 	unittest(rc == 2 && strings[2] == NULL, "of_property_read_string_array() failure; rc=%i\n", rc);
466 	strings[1] = NULL;
467 	rc = of_property_read_string_array(np, "phandle-list-names", strings, 1);
468 	unittest(rc == 1 && strings[1] == NULL, "Overwrote end of string array; rc=%i, str='%s'\n", rc, strings[1]);
469 }
470 
471 #define propcmp(p1, p2) (((p1)->length == (p2)->length) && \
472 			(p1)->value && (p2)->value && \
473 			!memcmp((p1)->value, (p2)->value, (p1)->length) && \
474 			!strcmp((p1)->name, (p2)->name))
475 static void __init of_unittest_property_copy(void)
476 {
477 #ifdef CONFIG_OF_DYNAMIC
478 	struct property p1 = { .name = "p1", .length = 0, .value = "" };
479 	struct property p2 = { .name = "p2", .length = 5, .value = "abcd" };
480 	struct property *new;
481 
482 	new = __of_prop_dup(&p1, GFP_KERNEL);
483 	unittest(new && propcmp(&p1, new), "empty property didn't copy correctly\n");
484 	kfree(new->value);
485 	kfree(new->name);
486 	kfree(new);
487 
488 	new = __of_prop_dup(&p2, GFP_KERNEL);
489 	unittest(new && propcmp(&p2, new), "non-empty property didn't copy correctly\n");
490 	kfree(new->value);
491 	kfree(new->name);
492 	kfree(new);
493 #endif
494 }
495 
496 static void __init of_unittest_changeset(void)
497 {
498 #ifdef CONFIG_OF_DYNAMIC
499 	struct property *ppadd, padd = { .name = "prop-add", .length = 0, .value = "" };
500 	struct property *ppupdate, pupdate = { .name = "prop-update", .length = 5, .value = "abcd" };
501 	struct property *ppremove;
502 	struct device_node *n1, *n2, *n21, *nremove, *parent, *np;
503 	struct of_changeset chgset;
504 
505 	n1 = __of_node_dup(NULL, "/testcase-data/changeset/n1");
506 	unittest(n1, "testcase setup failure\n");
507 	n2 = __of_node_dup(NULL, "/testcase-data/changeset/n2");
508 	unittest(n2, "testcase setup failure\n");
509 	n21 = __of_node_dup(NULL, "%s/%s", "/testcase-data/changeset/n2", "n21");
510 	unittest(n21, "testcase setup failure %p\n", n21);
511 	nremove = of_find_node_by_path("/testcase-data/changeset/node-remove");
512 	unittest(nremove, "testcase setup failure\n");
513 	ppadd = __of_prop_dup(&padd, GFP_KERNEL);
514 	unittest(ppadd, "testcase setup failure\n");
515 	ppupdate = __of_prop_dup(&pupdate, GFP_KERNEL);
516 	unittest(ppupdate, "testcase setup failure\n");
517 	parent = nremove->parent;
518 	n1->parent = parent;
519 	n2->parent = parent;
520 	n21->parent = n2;
521 	n2->child = n21;
522 	ppremove = of_find_property(parent, "prop-remove", NULL);
523 	unittest(ppremove, "failed to find removal prop");
524 
525 	of_changeset_init(&chgset);
526 	unittest(!of_changeset_attach_node(&chgset, n1), "fail attach n1\n");
527 	unittest(!of_changeset_attach_node(&chgset, n2), "fail attach n2\n");
528 	unittest(!of_changeset_detach_node(&chgset, nremove), "fail remove node\n");
529 	unittest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n");
530 	unittest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop\n");
531 	unittest(!of_changeset_update_property(&chgset, parent, ppupdate), "fail update prop\n");
532 	unittest(!of_changeset_remove_property(&chgset, parent, ppremove), "fail remove prop\n");
533 	mutex_lock(&of_mutex);
534 	unittest(!of_changeset_apply(&chgset), "apply failed\n");
535 	mutex_unlock(&of_mutex);
536 
537 	/* Make sure node names are constructed correctly */
538 	unittest((np = of_find_node_by_path("/testcase-data/changeset/n2/n21")),
539 		 "'%s' not added\n", n21->full_name);
540 	of_node_put(np);
541 
542 	mutex_lock(&of_mutex);
543 	unittest(!of_changeset_revert(&chgset), "revert failed\n");
544 	mutex_unlock(&of_mutex);
545 
546 	of_changeset_destroy(&chgset);
547 #endif
548 }
549 
550 static void __init of_unittest_parse_interrupts(void)
551 {
552 	struct device_node *np;
553 	struct of_phandle_args args;
554 	int i, rc;
555 
556 	np = of_find_node_by_path("/testcase-data/interrupts/interrupts0");
557 	if (!np) {
558 		pr_err("missing testcase data\n");
559 		return;
560 	}
561 
562 	for (i = 0; i < 4; i++) {
563 		bool passed = true;
564 
565 		args.args_count = 0;
566 		rc = of_irq_parse_one(np, i, &args);
567 
568 		passed &= !rc;
569 		passed &= (args.args_count == 1);
570 		passed &= (args.args[0] == (i + 1));
571 
572 		unittest(passed, "index %i - data error on node %s rc=%i\n",
573 			 i, args.np->full_name, rc);
574 	}
575 	of_node_put(np);
576 
577 	np = of_find_node_by_path("/testcase-data/interrupts/interrupts1");
578 	if (!np) {
579 		pr_err("missing testcase data\n");
580 		return;
581 	}
582 
583 	for (i = 0; i < 4; i++) {
584 		bool passed = true;
585 
586 		args.args_count = 0;
587 		rc = of_irq_parse_one(np, i, &args);
588 
589 		/* Test the values from tests-phandle.dtsi */
590 		switch (i) {
591 		case 0:
592 			passed &= !rc;
593 			passed &= (args.args_count == 1);
594 			passed &= (args.args[0] == 9);
595 			break;
596 		case 1:
597 			passed &= !rc;
598 			passed &= (args.args_count == 3);
599 			passed &= (args.args[0] == 10);
600 			passed &= (args.args[1] == 11);
601 			passed &= (args.args[2] == 12);
602 			break;
603 		case 2:
604 			passed &= !rc;
605 			passed &= (args.args_count == 2);
606 			passed &= (args.args[0] == 13);
607 			passed &= (args.args[1] == 14);
608 			break;
609 		case 3:
610 			passed &= !rc;
611 			passed &= (args.args_count == 2);
612 			passed &= (args.args[0] == 15);
613 			passed &= (args.args[1] == 16);
614 			break;
615 		default:
616 			passed = false;
617 		}
618 		unittest(passed, "index %i - data error on node %s rc=%i\n",
619 			 i, args.np->full_name, rc);
620 	}
621 	of_node_put(np);
622 }
623 
624 static void __init of_unittest_parse_interrupts_extended(void)
625 {
626 	struct device_node *np;
627 	struct of_phandle_args args;
628 	int i, rc;
629 
630 	np = of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0");
631 	if (!np) {
632 		pr_err("missing testcase data\n");
633 		return;
634 	}
635 
636 	for (i = 0; i < 7; i++) {
637 		bool passed = true;
638 
639 		rc = of_irq_parse_one(np, i, &args);
640 
641 		/* Test the values from tests-phandle.dtsi */
642 		switch (i) {
643 		case 0:
644 			passed &= !rc;
645 			passed &= (args.args_count == 1);
646 			passed &= (args.args[0] == 1);
647 			break;
648 		case 1:
649 			passed &= !rc;
650 			passed &= (args.args_count == 3);
651 			passed &= (args.args[0] == 2);
652 			passed &= (args.args[1] == 3);
653 			passed &= (args.args[2] == 4);
654 			break;
655 		case 2:
656 			passed &= !rc;
657 			passed &= (args.args_count == 2);
658 			passed &= (args.args[0] == 5);
659 			passed &= (args.args[1] == 6);
660 			break;
661 		case 3:
662 			passed &= !rc;
663 			passed &= (args.args_count == 1);
664 			passed &= (args.args[0] == 9);
665 			break;
666 		case 4:
667 			passed &= !rc;
668 			passed &= (args.args_count == 3);
669 			passed &= (args.args[0] == 10);
670 			passed &= (args.args[1] == 11);
671 			passed &= (args.args[2] == 12);
672 			break;
673 		case 5:
674 			passed &= !rc;
675 			passed &= (args.args_count == 2);
676 			passed &= (args.args[0] == 13);
677 			passed &= (args.args[1] == 14);
678 			break;
679 		case 6:
680 			passed &= !rc;
681 			passed &= (args.args_count == 1);
682 			passed &= (args.args[0] == 15);
683 			break;
684 		default:
685 			passed = false;
686 		}
687 
688 		unittest(passed, "index %i - data error on node %s rc=%i\n",
689 			 i, args.np->full_name, rc);
690 	}
691 	of_node_put(np);
692 }
693 
694 static const struct of_device_id match_node_table[] = {
695 	{ .data = "A", .name = "name0", }, /* Name alone is lowest priority */
696 	{ .data = "B", .type = "type1", }, /* followed by type alone */
697 
698 	{ .data = "Ca", .name = "name2", .type = "type1", }, /* followed by both together */
699 	{ .data = "Cb", .name = "name2", }, /* Only match when type doesn't match */
700 	{ .data = "Cc", .name = "name2", .type = "type2", },
701 
702 	{ .data = "E", .compatible = "compat3" },
703 	{ .data = "G", .compatible = "compat2", },
704 	{ .data = "H", .compatible = "compat2", .name = "name5", },
705 	{ .data = "I", .compatible = "compat2", .type = "type1", },
706 	{ .data = "J", .compatible = "compat2", .type = "type1", .name = "name8", },
707 	{ .data = "K", .compatible = "compat2", .name = "name9", },
708 	{}
709 };
710 
711 static struct {
712 	const char *path;
713 	const char *data;
714 } match_node_tests[] = {
715 	{ .path = "/testcase-data/match-node/name0", .data = "A", },
716 	{ .path = "/testcase-data/match-node/name1", .data = "B", },
717 	{ .path = "/testcase-data/match-node/a/name2", .data = "Ca", },
718 	{ .path = "/testcase-data/match-node/b/name2", .data = "Cb", },
719 	{ .path = "/testcase-data/match-node/c/name2", .data = "Cc", },
720 	{ .path = "/testcase-data/match-node/name3", .data = "E", },
721 	{ .path = "/testcase-data/match-node/name4", .data = "G", },
722 	{ .path = "/testcase-data/match-node/name5", .data = "H", },
723 	{ .path = "/testcase-data/match-node/name6", .data = "G", },
724 	{ .path = "/testcase-data/match-node/name7", .data = "I", },
725 	{ .path = "/testcase-data/match-node/name8", .data = "J", },
726 	{ .path = "/testcase-data/match-node/name9", .data = "K", },
727 };
728 
729 static void __init of_unittest_match_node(void)
730 {
731 	struct device_node *np;
732 	const struct of_device_id *match;
733 	int i;
734 
735 	for (i = 0; i < ARRAY_SIZE(match_node_tests); i++) {
736 		np = of_find_node_by_path(match_node_tests[i].path);
737 		if (!np) {
738 			unittest(0, "missing testcase node %s\n",
739 				match_node_tests[i].path);
740 			continue;
741 		}
742 
743 		match = of_match_node(match_node_table, np);
744 		if (!match) {
745 			unittest(0, "%s didn't match anything\n",
746 				match_node_tests[i].path);
747 			continue;
748 		}
749 
750 		if (strcmp(match->data, match_node_tests[i].data) != 0) {
751 			unittest(0, "%s got wrong match. expected %s, got %s\n",
752 				match_node_tests[i].path, match_node_tests[i].data,
753 				(const char *)match->data);
754 			continue;
755 		}
756 		unittest(1, "passed");
757 	}
758 }
759 
760 static const struct platform_device_info test_bus_info = {
761 	.name = "unittest-bus",
762 };
763 static void __init of_unittest_platform_populate(void)
764 {
765 	int irq, rc;
766 	struct device_node *np, *child, *grandchild;
767 	struct platform_device *pdev, *test_bus;
768 	const struct of_device_id match[] = {
769 		{ .compatible = "test-device", },
770 		{}
771 	};
772 
773 	np = of_find_node_by_path("/testcase-data");
774 	of_platform_populate(np, of_default_bus_match_table, NULL, NULL);
775 
776 	/* Test that a missing irq domain returns -EPROBE_DEFER */
777 	np = of_find_node_by_path("/testcase-data/testcase-device1");
778 	pdev = of_find_device_by_node(np);
779 	unittest(pdev, "device 1 creation failed\n");
780 
781 	irq = platform_get_irq(pdev, 0);
782 	unittest(irq == -EPROBE_DEFER, "device deferred probe failed - %d\n", irq);
783 
784 	/* Test that a parsing failure does not return -EPROBE_DEFER */
785 	np = of_find_node_by_path("/testcase-data/testcase-device2");
786 	pdev = of_find_device_by_node(np);
787 	unittest(pdev, "device 2 creation failed\n");
788 	irq = platform_get_irq(pdev, 0);
789 	unittest(irq < 0 && irq != -EPROBE_DEFER, "device parsing error failed - %d\n", irq);
790 
791 	np = of_find_node_by_path("/testcase-data/platform-tests");
792 	unittest(np, "No testcase data in device tree\n");
793 	if (!np)
794 		return;
795 
796 	test_bus = platform_device_register_full(&test_bus_info);
797 	rc = PTR_ERR_OR_ZERO(test_bus);
798 	unittest(!rc, "testbus registration failed; rc=%i\n", rc);
799 	if (rc)
800 		return;
801 	test_bus->dev.of_node = np;
802 
803 	of_platform_populate(np, match, NULL, &test_bus->dev);
804 	for_each_child_of_node(np, child) {
805 		for_each_child_of_node(child, grandchild)
806 			unittest(of_find_device_by_node(grandchild),
807 				 "Could not create device for node '%s'\n",
808 				 grandchild->name);
809 	}
810 
811 	of_platform_depopulate(&test_bus->dev);
812 	for_each_child_of_node(np, child) {
813 		for_each_child_of_node(child, grandchild)
814 			unittest(!of_find_device_by_node(grandchild),
815 				 "device didn't get destroyed '%s'\n",
816 				 grandchild->name);
817 	}
818 
819 	platform_device_unregister(test_bus);
820 	of_node_put(np);
821 }
822 
823 /**
824  *	update_node_properties - adds the properties
825  *	of np into dup node (present in live tree) and
826  *	updates parent of children of np to dup.
827  *
828  *	@np:	node already present in live tree
829  *	@dup:	node present in live tree to be updated
830  */
831 static void update_node_properties(struct device_node *np,
832 					struct device_node *dup)
833 {
834 	struct property *prop;
835 	struct device_node *child;
836 
837 	for_each_property_of_node(np, prop)
838 		of_add_property(dup, prop);
839 
840 	for_each_child_of_node(np, child)
841 		child->parent = dup;
842 }
843 
844 /**
845  *	attach_node_and_children - attaches nodes
846  *	and its children to live tree
847  *
848  *	@np:	Node to attach to live tree
849  */
850 static int attach_node_and_children(struct device_node *np)
851 {
852 	struct device_node *next, *dup, *child;
853 	unsigned long flags;
854 
855 	dup = of_find_node_by_path(np->full_name);
856 	if (dup) {
857 		update_node_properties(np, dup);
858 		return 0;
859 	}
860 
861 	child = np->child;
862 	np->child = NULL;
863 
864 	mutex_lock(&of_mutex);
865 	raw_spin_lock_irqsave(&devtree_lock, flags);
866 	np->sibling = np->parent->child;
867 	np->parent->child = np;
868 	of_node_clear_flag(np, OF_DETACHED);
869 	raw_spin_unlock_irqrestore(&devtree_lock, flags);
870 
871 	__of_attach_node_sysfs(np);
872 	mutex_unlock(&of_mutex);
873 
874 	while (child) {
875 		next = child->sibling;
876 		attach_node_and_children(child);
877 		child = next;
878 	}
879 
880 	return 0;
881 }
882 
883 /**
884  *	unittest_data_add - Reads, copies data from
885  *	linked tree and attaches it to the live tree
886  */
887 static int __init unittest_data_add(void)
888 {
889 	void *unittest_data;
890 	struct device_node *unittest_data_node, *np;
891 	/*
892 	 * __dtb_testcases_begin[] and __dtb_testcases_end[] are magically
893 	 * created by cmd_dt_S_dtb in scripts/Makefile.lib
894 	 */
895 	extern uint8_t __dtb_testcases_begin[];
896 	extern uint8_t __dtb_testcases_end[];
897 	const int size = __dtb_testcases_end - __dtb_testcases_begin;
898 	int rc;
899 
900 	if (!size) {
901 		pr_warn("%s: No testcase data to attach; not running tests\n",
902 			__func__);
903 		return -ENODATA;
904 	}
905 
906 	/* creating copy */
907 	unittest_data = kmemdup(__dtb_testcases_begin, size, GFP_KERNEL);
908 
909 	if (!unittest_data) {
910 		pr_warn("%s: Failed to allocate memory for unittest_data; "
911 			"not running tests\n", __func__);
912 		return -ENOMEM;
913 	}
914 	of_fdt_unflatten_tree(unittest_data, &unittest_data_node);
915 	if (!unittest_data_node) {
916 		pr_warn("%s: No tree to attach; not running tests\n", __func__);
917 		return -ENODATA;
918 	}
919 	of_node_set_flag(unittest_data_node, OF_DETACHED);
920 	rc = of_resolve_phandles(unittest_data_node);
921 	if (rc) {
922 		pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__, rc);
923 		return -EINVAL;
924 	}
925 
926 	if (!of_root) {
927 		of_root = unittest_data_node;
928 		for_each_of_allnodes(np)
929 			__of_attach_node_sysfs(np);
930 		of_aliases = of_find_node_by_path("/aliases");
931 		of_chosen = of_find_node_by_path("/chosen");
932 		return 0;
933 	}
934 
935 	/* attach the sub-tree to live tree */
936 	np = unittest_data_node->child;
937 	while (np) {
938 		struct device_node *next = np->sibling;
939 
940 		np->parent = of_root;
941 		attach_node_and_children(np);
942 		np = next;
943 	}
944 	return 0;
945 }
946 
947 #ifdef CONFIG_OF_OVERLAY
948 
949 static int unittest_probe(struct platform_device *pdev)
950 {
951 	struct device *dev = &pdev->dev;
952 	struct device_node *np = dev->of_node;
953 
954 	if (np == NULL) {
955 		dev_err(dev, "No OF data for device\n");
956 		return -EINVAL;
957 
958 	}
959 
960 	dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
961 
962 	of_platform_populate(np, NULL, NULL, &pdev->dev);
963 
964 	return 0;
965 }
966 
967 static int unittest_remove(struct platform_device *pdev)
968 {
969 	struct device *dev = &pdev->dev;
970 	struct device_node *np = dev->of_node;
971 
972 	dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
973 	return 0;
974 }
975 
976 static const struct of_device_id unittest_match[] = {
977 	{ .compatible = "unittest", },
978 	{},
979 };
980 
981 static struct platform_driver unittest_driver = {
982 	.probe			= unittest_probe,
983 	.remove			= unittest_remove,
984 	.driver = {
985 		.name		= "unittest",
986 		.of_match_table	= of_match_ptr(unittest_match),
987 	},
988 };
989 
990 /* get the platform device instantiated at the path */
991 static struct platform_device *of_path_to_platform_device(const char *path)
992 {
993 	struct device_node *np;
994 	struct platform_device *pdev;
995 
996 	np = of_find_node_by_path(path);
997 	if (np == NULL)
998 		return NULL;
999 
1000 	pdev = of_find_device_by_node(np);
1001 	of_node_put(np);
1002 
1003 	return pdev;
1004 }
1005 
1006 /* find out if a platform device exists at that path */
1007 static int of_path_platform_device_exists(const char *path)
1008 {
1009 	struct platform_device *pdev;
1010 
1011 	pdev = of_path_to_platform_device(path);
1012 	platform_device_put(pdev);
1013 	return pdev != NULL;
1014 }
1015 
1016 #if IS_BUILTIN(CONFIG_I2C)
1017 
1018 /* get the i2c client device instantiated at the path */
1019 static struct i2c_client *of_path_to_i2c_client(const char *path)
1020 {
1021 	struct device_node *np;
1022 	struct i2c_client *client;
1023 
1024 	np = of_find_node_by_path(path);
1025 	if (np == NULL)
1026 		return NULL;
1027 
1028 	client = of_find_i2c_device_by_node(np);
1029 	of_node_put(np);
1030 
1031 	return client;
1032 }
1033 
1034 /* find out if a i2c client device exists at that path */
1035 static int of_path_i2c_client_exists(const char *path)
1036 {
1037 	struct i2c_client *client;
1038 
1039 	client = of_path_to_i2c_client(path);
1040 	if (client)
1041 		put_device(&client->dev);
1042 	return client != NULL;
1043 }
1044 #else
1045 static int of_path_i2c_client_exists(const char *path)
1046 {
1047 	return 0;
1048 }
1049 #endif
1050 
1051 enum overlay_type {
1052 	PDEV_OVERLAY,
1053 	I2C_OVERLAY
1054 };
1055 
1056 static int of_path_device_type_exists(const char *path,
1057 		enum overlay_type ovtype)
1058 {
1059 	switch (ovtype) {
1060 	case PDEV_OVERLAY:
1061 		return of_path_platform_device_exists(path);
1062 	case I2C_OVERLAY:
1063 		return of_path_i2c_client_exists(path);
1064 	}
1065 	return 0;
1066 }
1067 
1068 static const char *unittest_path(int nr, enum overlay_type ovtype)
1069 {
1070 	const char *base;
1071 	static char buf[256];
1072 
1073 	switch (ovtype) {
1074 	case PDEV_OVERLAY:
1075 		base = "/testcase-data/overlay-node/test-bus";
1076 		break;
1077 	case I2C_OVERLAY:
1078 		base = "/testcase-data/overlay-node/test-bus/i2c-test-bus";
1079 		break;
1080 	default:
1081 		buf[0] = '\0';
1082 		return buf;
1083 	}
1084 	snprintf(buf, sizeof(buf) - 1, "%s/test-unittest%d", base, nr);
1085 	buf[sizeof(buf) - 1] = '\0';
1086 	return buf;
1087 }
1088 
1089 static int of_unittest_device_exists(int unittest_nr, enum overlay_type ovtype)
1090 {
1091 	const char *path;
1092 
1093 	path = unittest_path(unittest_nr, ovtype);
1094 
1095 	switch (ovtype) {
1096 	case PDEV_OVERLAY:
1097 		return of_path_platform_device_exists(path);
1098 	case I2C_OVERLAY:
1099 		return of_path_i2c_client_exists(path);
1100 	}
1101 	return 0;
1102 }
1103 
1104 static const char *overlay_path(int nr)
1105 {
1106 	static char buf[256];
1107 
1108 	snprintf(buf, sizeof(buf) - 1,
1109 		"/testcase-data/overlay%d", nr);
1110 	buf[sizeof(buf) - 1] = '\0';
1111 
1112 	return buf;
1113 }
1114 
1115 static const char *bus_path = "/testcase-data/overlay-node/test-bus";
1116 
1117 /* it is guaranteed that overlay ids are assigned in sequence */
1118 #define MAX_UNITTEST_OVERLAYS	256
1119 static unsigned long overlay_id_bits[BITS_TO_LONGS(MAX_UNITTEST_OVERLAYS)];
1120 static int overlay_first_id = -1;
1121 
1122 static void of_unittest_track_overlay(int id)
1123 {
1124 	if (overlay_first_id < 0)
1125 		overlay_first_id = id;
1126 	id -= overlay_first_id;
1127 
1128 	/* we shouldn't need that many */
1129 	BUG_ON(id >= MAX_UNITTEST_OVERLAYS);
1130 	overlay_id_bits[BIT_WORD(id)] |= BIT_MASK(id);
1131 }
1132 
1133 static void of_unittest_untrack_overlay(int id)
1134 {
1135 	if (overlay_first_id < 0)
1136 		return;
1137 	id -= overlay_first_id;
1138 	BUG_ON(id >= MAX_UNITTEST_OVERLAYS);
1139 	overlay_id_bits[BIT_WORD(id)] &= ~BIT_MASK(id);
1140 }
1141 
1142 static void of_unittest_destroy_tracked_overlays(void)
1143 {
1144 	int id, ret, defers;
1145 
1146 	if (overlay_first_id < 0)
1147 		return;
1148 
1149 	/* try until no defers */
1150 	do {
1151 		defers = 0;
1152 		/* remove in reverse order */
1153 		for (id = MAX_UNITTEST_OVERLAYS - 1; id >= 0; id--) {
1154 			if (!(overlay_id_bits[BIT_WORD(id)] & BIT_MASK(id)))
1155 				continue;
1156 
1157 			ret = of_overlay_destroy(id + overlay_first_id);
1158 			if (ret != 0) {
1159 				defers++;
1160 				pr_warn("%s: overlay destroy failed for #%d\n",
1161 					__func__, id + overlay_first_id);
1162 				continue;
1163 			}
1164 
1165 			overlay_id_bits[BIT_WORD(id)] &= ~BIT_MASK(id);
1166 		}
1167 	} while (defers > 0);
1168 }
1169 
1170 static int of_unittest_apply_overlay(int unittest_nr, int overlay_nr,
1171 		int *overlay_id)
1172 {
1173 	struct device_node *np = NULL;
1174 	int ret, id = -1;
1175 
1176 	np = of_find_node_by_path(overlay_path(overlay_nr));
1177 	if (np == NULL) {
1178 		unittest(0, "could not find overlay node @\"%s\"\n",
1179 				overlay_path(overlay_nr));
1180 		ret = -EINVAL;
1181 		goto out;
1182 	}
1183 
1184 	ret = of_overlay_create(np);
1185 	if (ret < 0) {
1186 		unittest(0, "could not create overlay from \"%s\"\n",
1187 				overlay_path(overlay_nr));
1188 		goto out;
1189 	}
1190 	id = ret;
1191 	of_unittest_track_overlay(id);
1192 
1193 	ret = 0;
1194 
1195 out:
1196 	of_node_put(np);
1197 
1198 	if (overlay_id)
1199 		*overlay_id = id;
1200 
1201 	return ret;
1202 }
1203 
1204 /* apply an overlay while checking before and after states */
1205 static int of_unittest_apply_overlay_check(int overlay_nr, int unittest_nr,
1206 		int before, int after, enum overlay_type ovtype)
1207 {
1208 	int ret;
1209 
1210 	/* unittest device must not be in before state */
1211 	if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
1212 		unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1213 				overlay_path(overlay_nr),
1214 				unittest_path(unittest_nr, ovtype),
1215 				!before ? "enabled" : "disabled");
1216 		return -EINVAL;
1217 	}
1218 
1219 	ret = of_unittest_apply_overlay(overlay_nr, unittest_nr, NULL);
1220 	if (ret != 0) {
1221 		/* of_unittest_apply_overlay already called unittest() */
1222 		return ret;
1223 	}
1224 
1225 	/* unittest device must be to set to after state */
1226 	if (of_unittest_device_exists(unittest_nr, ovtype) != after) {
1227 		unittest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n",
1228 				overlay_path(overlay_nr),
1229 				unittest_path(unittest_nr, ovtype),
1230 				!after ? "enabled" : "disabled");
1231 		return -EINVAL;
1232 	}
1233 
1234 	return 0;
1235 }
1236 
1237 /* apply an overlay and then revert it while checking before, after states */
1238 static int of_unittest_apply_revert_overlay_check(int overlay_nr,
1239 		int unittest_nr, int before, int after,
1240 		enum overlay_type ovtype)
1241 {
1242 	int ret, ov_id;
1243 
1244 	/* unittest device must be in before state */
1245 	if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
1246 		unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1247 				overlay_path(overlay_nr),
1248 				unittest_path(unittest_nr, ovtype),
1249 				!before ? "enabled" : "disabled");
1250 		return -EINVAL;
1251 	}
1252 
1253 	/* apply the overlay */
1254 	ret = of_unittest_apply_overlay(overlay_nr, unittest_nr, &ov_id);
1255 	if (ret != 0) {
1256 		/* of_unittest_apply_overlay already called unittest() */
1257 		return ret;
1258 	}
1259 
1260 	/* unittest device must be in after state */
1261 	if (of_unittest_device_exists(unittest_nr, ovtype) != after) {
1262 		unittest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n",
1263 				overlay_path(overlay_nr),
1264 				unittest_path(unittest_nr, ovtype),
1265 				!after ? "enabled" : "disabled");
1266 		return -EINVAL;
1267 	}
1268 
1269 	ret = of_overlay_destroy(ov_id);
1270 	if (ret != 0) {
1271 		unittest(0, "overlay @\"%s\" failed to be destroyed @\"%s\"\n",
1272 				overlay_path(overlay_nr),
1273 				unittest_path(unittest_nr, ovtype));
1274 		return ret;
1275 	}
1276 
1277 	/* unittest device must be again in before state */
1278 	if (of_unittest_device_exists(unittest_nr, PDEV_OVERLAY) != before) {
1279 		unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1280 				overlay_path(overlay_nr),
1281 				unittest_path(unittest_nr, ovtype),
1282 				!before ? "enabled" : "disabled");
1283 		return -EINVAL;
1284 	}
1285 
1286 	return 0;
1287 }
1288 
1289 /* test activation of device */
1290 static void of_unittest_overlay_0(void)
1291 {
1292 	int ret;
1293 
1294 	/* device should enable */
1295 	ret = of_unittest_apply_overlay_check(0, 0, 0, 1, PDEV_OVERLAY);
1296 	if (ret != 0)
1297 		return;
1298 
1299 	unittest(1, "overlay test %d passed\n", 0);
1300 }
1301 
1302 /* test deactivation of device */
1303 static void of_unittest_overlay_1(void)
1304 {
1305 	int ret;
1306 
1307 	/* device should disable */
1308 	ret = of_unittest_apply_overlay_check(1, 1, 1, 0, PDEV_OVERLAY);
1309 	if (ret != 0)
1310 		return;
1311 
1312 	unittest(1, "overlay test %d passed\n", 1);
1313 }
1314 
1315 /* test activation of device */
1316 static void of_unittest_overlay_2(void)
1317 {
1318 	int ret;
1319 
1320 	/* device should enable */
1321 	ret = of_unittest_apply_overlay_check(2, 2, 0, 1, PDEV_OVERLAY);
1322 	if (ret != 0)
1323 		return;
1324 
1325 	unittest(1, "overlay test %d passed\n", 2);
1326 }
1327 
1328 /* test deactivation of device */
1329 static void of_unittest_overlay_3(void)
1330 {
1331 	int ret;
1332 
1333 	/* device should disable */
1334 	ret = of_unittest_apply_overlay_check(3, 3, 1, 0, PDEV_OVERLAY);
1335 	if (ret != 0)
1336 		return;
1337 
1338 	unittest(1, "overlay test %d passed\n", 3);
1339 }
1340 
1341 /* test activation of a full device node */
1342 static void of_unittest_overlay_4(void)
1343 {
1344 	int ret;
1345 
1346 	/* device should disable */
1347 	ret = of_unittest_apply_overlay_check(4, 4, 0, 1, PDEV_OVERLAY);
1348 	if (ret != 0)
1349 		return;
1350 
1351 	unittest(1, "overlay test %d passed\n", 4);
1352 }
1353 
1354 /* test overlay apply/revert sequence */
1355 static void of_unittest_overlay_5(void)
1356 {
1357 	int ret;
1358 
1359 	/* device should disable */
1360 	ret = of_unittest_apply_revert_overlay_check(5, 5, 0, 1, PDEV_OVERLAY);
1361 	if (ret != 0)
1362 		return;
1363 
1364 	unittest(1, "overlay test %d passed\n", 5);
1365 }
1366 
1367 /* test overlay application in sequence */
1368 static void of_unittest_overlay_6(void)
1369 {
1370 	struct device_node *np;
1371 	int ret, i, ov_id[2];
1372 	int overlay_nr = 6, unittest_nr = 6;
1373 	int before = 0, after = 1;
1374 
1375 	/* unittest device must be in before state */
1376 	for (i = 0; i < 2; i++) {
1377 		if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
1378 				!= before) {
1379 			unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1380 					overlay_path(overlay_nr + i),
1381 					unittest_path(unittest_nr + i,
1382 						PDEV_OVERLAY),
1383 					!before ? "enabled" : "disabled");
1384 			return;
1385 		}
1386 	}
1387 
1388 	/* apply the overlays */
1389 	for (i = 0; i < 2; i++) {
1390 
1391 		np = of_find_node_by_path(overlay_path(overlay_nr + i));
1392 		if (np == NULL) {
1393 			unittest(0, "could not find overlay node @\"%s\"\n",
1394 					overlay_path(overlay_nr + i));
1395 			return;
1396 		}
1397 
1398 		ret = of_overlay_create(np);
1399 		if (ret < 0)  {
1400 			unittest(0, "could not create overlay from \"%s\"\n",
1401 					overlay_path(overlay_nr + i));
1402 			return;
1403 		}
1404 		ov_id[i] = ret;
1405 		of_unittest_track_overlay(ov_id[i]);
1406 	}
1407 
1408 	for (i = 0; i < 2; i++) {
1409 		/* unittest device must be in after state */
1410 		if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
1411 				!= after) {
1412 			unittest(0, "overlay @\"%s\" failed @\"%s\" %s\n",
1413 					overlay_path(overlay_nr + i),
1414 					unittest_path(unittest_nr + i,
1415 						PDEV_OVERLAY),
1416 					!after ? "enabled" : "disabled");
1417 			return;
1418 		}
1419 	}
1420 
1421 	for (i = 1; i >= 0; i--) {
1422 		ret = of_overlay_destroy(ov_id[i]);
1423 		if (ret != 0) {
1424 			unittest(0, "overlay @\"%s\" failed destroy @\"%s\"\n",
1425 					overlay_path(overlay_nr + i),
1426 					unittest_path(unittest_nr + i,
1427 						PDEV_OVERLAY));
1428 			return;
1429 		}
1430 		of_unittest_untrack_overlay(ov_id[i]);
1431 	}
1432 
1433 	for (i = 0; i < 2; i++) {
1434 		/* unittest device must be again in before state */
1435 		if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
1436 				!= before) {
1437 			unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1438 					overlay_path(overlay_nr + i),
1439 					unittest_path(unittest_nr + i,
1440 						PDEV_OVERLAY),
1441 					!before ? "enabled" : "disabled");
1442 			return;
1443 		}
1444 	}
1445 
1446 	unittest(1, "overlay test %d passed\n", 6);
1447 }
1448 
1449 /* test overlay application in sequence */
1450 static void of_unittest_overlay_8(void)
1451 {
1452 	struct device_node *np;
1453 	int ret, i, ov_id[2];
1454 	int overlay_nr = 8, unittest_nr = 8;
1455 
1456 	/* we don't care about device state in this test */
1457 
1458 	/* apply the overlays */
1459 	for (i = 0; i < 2; i++) {
1460 
1461 		np = of_find_node_by_path(overlay_path(overlay_nr + i));
1462 		if (np == NULL) {
1463 			unittest(0, "could not find overlay node @\"%s\"\n",
1464 					overlay_path(overlay_nr + i));
1465 			return;
1466 		}
1467 
1468 		ret = of_overlay_create(np);
1469 		if (ret < 0)  {
1470 			unittest(0, "could not create overlay from \"%s\"\n",
1471 					overlay_path(overlay_nr + i));
1472 			return;
1473 		}
1474 		ov_id[i] = ret;
1475 		of_unittest_track_overlay(ov_id[i]);
1476 	}
1477 
1478 	/* now try to remove first overlay (it should fail) */
1479 	ret = of_overlay_destroy(ov_id[0]);
1480 	if (ret == 0) {
1481 		unittest(0, "overlay @\"%s\" was destroyed @\"%s\"\n",
1482 				overlay_path(overlay_nr + 0),
1483 				unittest_path(unittest_nr,
1484 					PDEV_OVERLAY));
1485 		return;
1486 	}
1487 
1488 	/* removing them in order should work */
1489 	for (i = 1; i >= 0; i--) {
1490 		ret = of_overlay_destroy(ov_id[i]);
1491 		if (ret != 0) {
1492 			unittest(0, "overlay @\"%s\" not destroyed @\"%s\"\n",
1493 					overlay_path(overlay_nr + i),
1494 					unittest_path(unittest_nr,
1495 						PDEV_OVERLAY));
1496 			return;
1497 		}
1498 		of_unittest_untrack_overlay(ov_id[i]);
1499 	}
1500 
1501 	unittest(1, "overlay test %d passed\n", 8);
1502 }
1503 
1504 /* test insertion of a bus with parent devices */
1505 static void of_unittest_overlay_10(void)
1506 {
1507 	int ret;
1508 	char *child_path;
1509 
1510 	/* device should disable */
1511 	ret = of_unittest_apply_overlay_check(10, 10, 0, 1, PDEV_OVERLAY);
1512 	if (unittest(ret == 0,
1513 			"overlay test %d failed; overlay application\n", 10))
1514 		return;
1515 
1516 	child_path = kasprintf(GFP_KERNEL, "%s/test-unittest101",
1517 			unittest_path(10, PDEV_OVERLAY));
1518 	if (unittest(child_path, "overlay test %d failed; kasprintf\n", 10))
1519 		return;
1520 
1521 	ret = of_path_device_type_exists(child_path, PDEV_OVERLAY);
1522 	kfree(child_path);
1523 	if (unittest(ret, "overlay test %d failed; no child device\n", 10))
1524 		return;
1525 }
1526 
1527 /* test insertion of a bus with parent devices (and revert) */
1528 static void of_unittest_overlay_11(void)
1529 {
1530 	int ret;
1531 
1532 	/* device should disable */
1533 	ret = of_unittest_apply_revert_overlay_check(11, 11, 0, 1,
1534 			PDEV_OVERLAY);
1535 	if (unittest(ret == 0,
1536 			"overlay test %d failed; overlay application\n", 11))
1537 		return;
1538 }
1539 
1540 #if IS_BUILTIN(CONFIG_I2C) && IS_ENABLED(CONFIG_OF_OVERLAY)
1541 
1542 struct unittest_i2c_bus_data {
1543 	struct platform_device	*pdev;
1544 	struct i2c_adapter	adap;
1545 };
1546 
1547 static int unittest_i2c_master_xfer(struct i2c_adapter *adap,
1548 		struct i2c_msg *msgs, int num)
1549 {
1550 	struct unittest_i2c_bus_data *std = i2c_get_adapdata(adap);
1551 
1552 	(void)std;
1553 
1554 	return num;
1555 }
1556 
1557 static u32 unittest_i2c_functionality(struct i2c_adapter *adap)
1558 {
1559 	return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
1560 }
1561 
1562 static const struct i2c_algorithm unittest_i2c_algo = {
1563 	.master_xfer	= unittest_i2c_master_xfer,
1564 	.functionality	= unittest_i2c_functionality,
1565 };
1566 
1567 static int unittest_i2c_bus_probe(struct platform_device *pdev)
1568 {
1569 	struct device *dev = &pdev->dev;
1570 	struct device_node *np = dev->of_node;
1571 	struct unittest_i2c_bus_data *std;
1572 	struct i2c_adapter *adap;
1573 	int ret;
1574 
1575 	if (np == NULL) {
1576 		dev_err(dev, "No OF data for device\n");
1577 		return -EINVAL;
1578 
1579 	}
1580 
1581 	dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1582 
1583 	std = devm_kzalloc(dev, sizeof(*std), GFP_KERNEL);
1584 	if (!std) {
1585 		dev_err(dev, "Failed to allocate unittest i2c data\n");
1586 		return -ENOMEM;
1587 	}
1588 
1589 	/* link them together */
1590 	std->pdev = pdev;
1591 	platform_set_drvdata(pdev, std);
1592 
1593 	adap = &std->adap;
1594 	i2c_set_adapdata(adap, std);
1595 	adap->nr = -1;
1596 	strlcpy(adap->name, pdev->name, sizeof(adap->name));
1597 	adap->class = I2C_CLASS_DEPRECATED;
1598 	adap->algo = &unittest_i2c_algo;
1599 	adap->dev.parent = dev;
1600 	adap->dev.of_node = dev->of_node;
1601 	adap->timeout = 5 * HZ;
1602 	adap->retries = 3;
1603 
1604 	ret = i2c_add_numbered_adapter(adap);
1605 	if (ret != 0) {
1606 		dev_err(dev, "Failed to add I2C adapter\n");
1607 		return ret;
1608 	}
1609 
1610 	return 0;
1611 }
1612 
1613 static int unittest_i2c_bus_remove(struct platform_device *pdev)
1614 {
1615 	struct device *dev = &pdev->dev;
1616 	struct device_node *np = dev->of_node;
1617 	struct unittest_i2c_bus_data *std = platform_get_drvdata(pdev);
1618 
1619 	dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1620 	i2c_del_adapter(&std->adap);
1621 
1622 	return 0;
1623 }
1624 
1625 static const struct of_device_id unittest_i2c_bus_match[] = {
1626 	{ .compatible = "unittest-i2c-bus", },
1627 	{},
1628 };
1629 
1630 static struct platform_driver unittest_i2c_bus_driver = {
1631 	.probe			= unittest_i2c_bus_probe,
1632 	.remove			= unittest_i2c_bus_remove,
1633 	.driver = {
1634 		.name		= "unittest-i2c-bus",
1635 		.of_match_table	= of_match_ptr(unittest_i2c_bus_match),
1636 	},
1637 };
1638 
1639 static int unittest_i2c_dev_probe(struct i2c_client *client,
1640 		const struct i2c_device_id *id)
1641 {
1642 	struct device *dev = &client->dev;
1643 	struct device_node *np = client->dev.of_node;
1644 
1645 	if (!np) {
1646 		dev_err(dev, "No OF node\n");
1647 		return -EINVAL;
1648 	}
1649 
1650 	dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1651 
1652 	return 0;
1653 };
1654 
1655 static int unittest_i2c_dev_remove(struct i2c_client *client)
1656 {
1657 	struct device *dev = &client->dev;
1658 	struct device_node *np = client->dev.of_node;
1659 
1660 	dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1661 	return 0;
1662 }
1663 
1664 static const struct i2c_device_id unittest_i2c_dev_id[] = {
1665 	{ .name = "unittest-i2c-dev" },
1666 	{ }
1667 };
1668 
1669 static struct i2c_driver unittest_i2c_dev_driver = {
1670 	.driver = {
1671 		.name = "unittest-i2c-dev",
1672 	},
1673 	.probe = unittest_i2c_dev_probe,
1674 	.remove = unittest_i2c_dev_remove,
1675 	.id_table = unittest_i2c_dev_id,
1676 };
1677 
1678 #if IS_BUILTIN(CONFIG_I2C_MUX)
1679 
1680 struct unittest_i2c_mux_data {
1681 	int nchans;
1682 	struct i2c_adapter *adap[];
1683 };
1684 
1685 static int unittest_i2c_mux_select_chan(struct i2c_adapter *adap,
1686 			       void *client, u32 chan)
1687 {
1688 	return 0;
1689 }
1690 
1691 static int unittest_i2c_mux_probe(struct i2c_client *client,
1692 		const struct i2c_device_id *id)
1693 {
1694 	int ret, i, nchans, size;
1695 	struct device *dev = &client->dev;
1696 	struct i2c_adapter *adap = to_i2c_adapter(dev->parent);
1697 	struct device_node *np = client->dev.of_node, *child;
1698 	struct unittest_i2c_mux_data *stm;
1699 	u32 reg, max_reg;
1700 
1701 	dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1702 
1703 	if (!np) {
1704 		dev_err(dev, "No OF node\n");
1705 		return -EINVAL;
1706 	}
1707 
1708 	max_reg = (u32)-1;
1709 	for_each_child_of_node(np, child) {
1710 		ret = of_property_read_u32(child, "reg", &reg);
1711 		if (ret)
1712 			continue;
1713 		if (max_reg == (u32)-1 || reg > max_reg)
1714 			max_reg = reg;
1715 	}
1716 	nchans = max_reg == (u32)-1 ? 0 : max_reg + 1;
1717 	if (nchans == 0) {
1718 		dev_err(dev, "No channels\n");
1719 		return -EINVAL;
1720 	}
1721 
1722 	size = offsetof(struct unittest_i2c_mux_data, adap[nchans]);
1723 	stm = devm_kzalloc(dev, size, GFP_KERNEL);
1724 	if (!stm) {
1725 		dev_err(dev, "Out of memory\n");
1726 		return -ENOMEM;
1727 	}
1728 	stm->nchans = nchans;
1729 	for (i = 0; i < nchans; i++) {
1730 		stm->adap[i] = i2c_add_mux_adapter(adap, dev, client,
1731 				0, i, 0, unittest_i2c_mux_select_chan, NULL);
1732 		if (!stm->adap[i]) {
1733 			dev_err(dev, "Failed to register mux #%d\n", i);
1734 			for (i--; i >= 0; i--)
1735 				i2c_del_mux_adapter(stm->adap[i]);
1736 			return -ENODEV;
1737 		}
1738 	}
1739 
1740 	i2c_set_clientdata(client, stm);
1741 
1742 	return 0;
1743 };
1744 
1745 static int unittest_i2c_mux_remove(struct i2c_client *client)
1746 {
1747 	struct device *dev = &client->dev;
1748 	struct device_node *np = client->dev.of_node;
1749 	struct unittest_i2c_mux_data *stm = i2c_get_clientdata(client);
1750 	int i;
1751 
1752 	dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1753 	for (i = stm->nchans - 1; i >= 0; i--)
1754 		i2c_del_mux_adapter(stm->adap[i]);
1755 	return 0;
1756 }
1757 
1758 static const struct i2c_device_id unittest_i2c_mux_id[] = {
1759 	{ .name = "unittest-i2c-mux" },
1760 	{ }
1761 };
1762 
1763 static struct i2c_driver unittest_i2c_mux_driver = {
1764 	.driver = {
1765 		.name = "unittest-i2c-mux",
1766 	},
1767 	.probe = unittest_i2c_mux_probe,
1768 	.remove = unittest_i2c_mux_remove,
1769 	.id_table = unittest_i2c_mux_id,
1770 };
1771 
1772 #endif
1773 
1774 static int of_unittest_overlay_i2c_init(void)
1775 {
1776 	int ret;
1777 
1778 	ret = i2c_add_driver(&unittest_i2c_dev_driver);
1779 	if (unittest(ret == 0,
1780 			"could not register unittest i2c device driver\n"))
1781 		return ret;
1782 
1783 	ret = platform_driver_register(&unittest_i2c_bus_driver);
1784 	if (unittest(ret == 0,
1785 			"could not register unittest i2c bus driver\n"))
1786 		return ret;
1787 
1788 #if IS_BUILTIN(CONFIG_I2C_MUX)
1789 	ret = i2c_add_driver(&unittest_i2c_mux_driver);
1790 	if (unittest(ret == 0,
1791 			"could not register unittest i2c mux driver\n"))
1792 		return ret;
1793 #endif
1794 
1795 	return 0;
1796 }
1797 
1798 static void of_unittest_overlay_i2c_cleanup(void)
1799 {
1800 #if IS_BUILTIN(CONFIG_I2C_MUX)
1801 	i2c_del_driver(&unittest_i2c_mux_driver);
1802 #endif
1803 	platform_driver_unregister(&unittest_i2c_bus_driver);
1804 	i2c_del_driver(&unittest_i2c_dev_driver);
1805 }
1806 
1807 static void of_unittest_overlay_i2c_12(void)
1808 {
1809 	int ret;
1810 
1811 	/* device should enable */
1812 	ret = of_unittest_apply_overlay_check(12, 12, 0, 1, I2C_OVERLAY);
1813 	if (ret != 0)
1814 		return;
1815 
1816 	unittest(1, "overlay test %d passed\n", 12);
1817 }
1818 
1819 /* test deactivation of device */
1820 static void of_unittest_overlay_i2c_13(void)
1821 {
1822 	int ret;
1823 
1824 	/* device should disable */
1825 	ret = of_unittest_apply_overlay_check(13, 13, 1, 0, I2C_OVERLAY);
1826 	if (ret != 0)
1827 		return;
1828 
1829 	unittest(1, "overlay test %d passed\n", 13);
1830 }
1831 
1832 /* just check for i2c mux existence */
1833 static void of_unittest_overlay_i2c_14(void)
1834 {
1835 }
1836 
1837 static void of_unittest_overlay_i2c_15(void)
1838 {
1839 	int ret;
1840 
1841 	/* device should enable */
1842 	ret = of_unittest_apply_overlay_check(16, 15, 0, 1, I2C_OVERLAY);
1843 	if (ret != 0)
1844 		return;
1845 
1846 	unittest(1, "overlay test %d passed\n", 15);
1847 }
1848 
1849 #else
1850 
1851 static inline void of_unittest_overlay_i2c_14(void) { }
1852 static inline void of_unittest_overlay_i2c_15(void) { }
1853 
1854 #endif
1855 
1856 static void __init of_unittest_overlay(void)
1857 {
1858 	struct device_node *bus_np = NULL;
1859 	int ret;
1860 
1861 	ret = platform_driver_register(&unittest_driver);
1862 	if (ret != 0) {
1863 		unittest(0, "could not register unittest driver\n");
1864 		goto out;
1865 	}
1866 
1867 	bus_np = of_find_node_by_path(bus_path);
1868 	if (bus_np == NULL) {
1869 		unittest(0, "could not find bus_path \"%s\"\n", bus_path);
1870 		goto out;
1871 	}
1872 
1873 	ret = of_platform_populate(bus_np, of_default_bus_match_table,
1874 			NULL, NULL);
1875 	if (ret != 0) {
1876 		unittest(0, "could not populate bus @ \"%s\"\n", bus_path);
1877 		goto out;
1878 	}
1879 
1880 	if (!of_unittest_device_exists(100, PDEV_OVERLAY)) {
1881 		unittest(0, "could not find unittest0 @ \"%s\"\n",
1882 				unittest_path(100, PDEV_OVERLAY));
1883 		goto out;
1884 	}
1885 
1886 	if (of_unittest_device_exists(101, PDEV_OVERLAY)) {
1887 		unittest(0, "unittest1 @ \"%s\" should not exist\n",
1888 				unittest_path(101, PDEV_OVERLAY));
1889 		goto out;
1890 	}
1891 
1892 	unittest(1, "basic infrastructure of overlays passed");
1893 
1894 	/* tests in sequence */
1895 	of_unittest_overlay_0();
1896 	of_unittest_overlay_1();
1897 	of_unittest_overlay_2();
1898 	of_unittest_overlay_3();
1899 	of_unittest_overlay_4();
1900 	of_unittest_overlay_5();
1901 	of_unittest_overlay_6();
1902 	of_unittest_overlay_8();
1903 
1904 	of_unittest_overlay_10();
1905 	of_unittest_overlay_11();
1906 
1907 #if IS_BUILTIN(CONFIG_I2C)
1908 	if (unittest(of_unittest_overlay_i2c_init() == 0, "i2c init failed\n"))
1909 		goto out;
1910 
1911 	of_unittest_overlay_i2c_12();
1912 	of_unittest_overlay_i2c_13();
1913 	of_unittest_overlay_i2c_14();
1914 	of_unittest_overlay_i2c_15();
1915 
1916 	of_unittest_overlay_i2c_cleanup();
1917 #endif
1918 
1919 	of_unittest_destroy_tracked_overlays();
1920 
1921 out:
1922 	of_node_put(bus_np);
1923 }
1924 
1925 #else
1926 static inline void __init of_unittest_overlay(void) { }
1927 #endif
1928 
1929 static int __init of_unittest(void)
1930 {
1931 	struct device_node *np;
1932 	int res;
1933 
1934 	/* adding data for unittest */
1935 	res = unittest_data_add();
1936 	if (res)
1937 		return res;
1938 	if (!of_aliases)
1939 		of_aliases = of_find_node_by_path("/aliases");
1940 
1941 	np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
1942 	if (!np) {
1943 		pr_info("No testcase data in device tree; not running tests\n");
1944 		return 0;
1945 	}
1946 	of_node_put(np);
1947 
1948 	pr_info("start of unittest - you will see error messages\n");
1949 	of_unittest_check_tree_linkage();
1950 	of_unittest_check_phandles();
1951 	of_unittest_find_node_by_name();
1952 	of_unittest_dynamic();
1953 	of_unittest_parse_phandle_with_args();
1954 	of_unittest_property_string();
1955 	of_unittest_property_copy();
1956 	of_unittest_changeset();
1957 	of_unittest_parse_interrupts();
1958 	of_unittest_parse_interrupts_extended();
1959 	of_unittest_match_node();
1960 	of_unittest_platform_populate();
1961 	of_unittest_overlay();
1962 
1963 	/* Double check linkage after removing testcase data */
1964 	of_unittest_check_tree_linkage();
1965 
1966 	pr_info("end of unittest - %i passed, %i failed\n",
1967 		unittest_results.passed, unittest_results.failed);
1968 
1969 	return 0;
1970 }
1971 late_initcall(of_unittest);
1972