Merge tag 'nfs-for-5.6-1' of git://git.linux-nfs.org/projects/anna/linux-nfs
[linux-2.6-block.git] / drivers / of / unittest.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Self tests for device tree subsystem
4  */
5
6 #define pr_fmt(fmt) "### dt-test ### " fmt
7
8 #include <linux/memblock.h>
9 #include <linux/clk.h>
10 #include <linux/err.h>
11 #include <linux/errno.h>
12 #include <linux/hashtable.h>
13 #include <linux/libfdt.h>
14 #include <linux/of.h>
15 #include <linux/of_address.h>
16 #include <linux/of_fdt.h>
17 #include <linux/of_irq.h>
18 #include <linux/of_platform.h>
19 #include <linux/list.h>
20 #include <linux/mutex.h>
21 #include <linux/slab.h>
22 #include <linux/device.h>
23 #include <linux/platform_device.h>
24
25 #include <linux/i2c.h>
26 #include <linux/i2c-mux.h>
27
28 #include <linux/bitops.h>
29
30 #include "of_private.h"
31
32 static struct unittest_results {
33         int passed;
34         int failed;
35 } unittest_results;
36
37 #define unittest(result, fmt, ...) ({ \
38         bool failed = !(result); \
39         if (failed) { \
40                 unittest_results.failed++; \
41                 pr_err("FAIL %s():%i " fmt, __func__, __LINE__, ##__VA_ARGS__); \
42         } else { \
43                 unittest_results.passed++; \
44                 pr_debug("pass %s():%i\n", __func__, __LINE__); \
45         } \
46         failed; \
47 })
48
49 static void __init of_unittest_find_node_by_name(void)
50 {
51         struct device_node *np;
52         const char *options, *name;
53
54         np = of_find_node_by_path("/testcase-data");
55         name = kasprintf(GFP_KERNEL, "%pOF", np);
56         unittest(np && !strcmp("/testcase-data", name),
57                 "find /testcase-data failed\n");
58         of_node_put(np);
59         kfree(name);
60
61         /* Test if trailing '/' works */
62         np = of_find_node_by_path("/testcase-data/");
63         unittest(!np, "trailing '/' on /testcase-data/ should fail\n");
64
65         np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
66         name = kasprintf(GFP_KERNEL, "%pOF", np);
67         unittest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", name),
68                 "find /testcase-data/phandle-tests/consumer-a failed\n");
69         of_node_put(np);
70         kfree(name);
71
72         np = of_find_node_by_path("testcase-alias");
73         name = kasprintf(GFP_KERNEL, "%pOF", np);
74         unittest(np && !strcmp("/testcase-data", name),
75                 "find testcase-alias failed\n");
76         of_node_put(np);
77         kfree(name);
78
79         /* Test if trailing '/' works on aliases */
80         np = of_find_node_by_path("testcase-alias/");
81         unittest(!np, "trailing '/' on testcase-alias/ should fail\n");
82
83         np = of_find_node_by_path("testcase-alias/phandle-tests/consumer-a");
84         name = kasprintf(GFP_KERNEL, "%pOF", np);
85         unittest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", name),
86                 "find testcase-alias/phandle-tests/consumer-a failed\n");
87         of_node_put(np);
88         kfree(name);
89
90         np = of_find_node_by_path("/testcase-data/missing-path");
91         unittest(!np, "non-existent path returned node %pOF\n", np);
92         of_node_put(np);
93
94         np = of_find_node_by_path("missing-alias");
95         unittest(!np, "non-existent alias returned node %pOF\n", np);
96         of_node_put(np);
97
98         np = of_find_node_by_path("testcase-alias/missing-path");
99         unittest(!np, "non-existent alias with relative path returned node %pOF\n", np);
100         of_node_put(np);
101
102         np = of_find_node_opts_by_path("/testcase-data:testoption", &options);
103         unittest(np && !strcmp("testoption", options),
104                  "option path test failed\n");
105         of_node_put(np);
106
107         np = of_find_node_opts_by_path("/testcase-data:test/option", &options);
108         unittest(np && !strcmp("test/option", options),
109                  "option path test, subcase #1 failed\n");
110         of_node_put(np);
111
112         np = of_find_node_opts_by_path("/testcase-data/testcase-device1:test/option", &options);
113         unittest(np && !strcmp("test/option", options),
114                  "option path test, subcase #2 failed\n");
115         of_node_put(np);
116
117         np = of_find_node_opts_by_path("/testcase-data:testoption", NULL);
118         unittest(np, "NULL option path test failed\n");
119         of_node_put(np);
120
121         np = of_find_node_opts_by_path("testcase-alias:testaliasoption",
122                                        &options);
123         unittest(np && !strcmp("testaliasoption", options),
124                  "option alias path test failed\n");
125         of_node_put(np);
126
127         np = of_find_node_opts_by_path("testcase-alias:test/alias/option",
128                                        &options);
129         unittest(np && !strcmp("test/alias/option", options),
130                  "option alias path test, subcase #1 failed\n");
131         of_node_put(np);
132
133         np = of_find_node_opts_by_path("testcase-alias:testaliasoption", NULL);
134         unittest(np, "NULL option alias path test failed\n");
135         of_node_put(np);
136
137         options = "testoption";
138         np = of_find_node_opts_by_path("testcase-alias", &options);
139         unittest(np && !options, "option clearing test failed\n");
140         of_node_put(np);
141
142         options = "testoption";
143         np = of_find_node_opts_by_path("/", &options);
144         unittest(np && !options, "option clearing root node test failed\n");
145         of_node_put(np);
146 }
147
148 static void __init of_unittest_dynamic(void)
149 {
150         struct device_node *np;
151         struct property *prop;
152
153         np = of_find_node_by_path("/testcase-data");
154         if (!np) {
155                 pr_err("missing testcase data\n");
156                 return;
157         }
158
159         /* Array of 4 properties for the purpose of testing */
160         prop = kcalloc(4, sizeof(*prop), GFP_KERNEL);
161         if (!prop) {
162                 unittest(0, "kzalloc() failed\n");
163                 return;
164         }
165
166         /* Add a new property - should pass*/
167         prop->name = "new-property";
168         prop->value = "new-property-data";
169         prop->length = strlen(prop->value) + 1;
170         unittest(of_add_property(np, prop) == 0, "Adding a new property failed\n");
171
172         /* Try to add an existing property - should fail */
173         prop++;
174         prop->name = "new-property";
175         prop->value = "new-property-data-should-fail";
176         prop->length = strlen(prop->value) + 1;
177         unittest(of_add_property(np, prop) != 0,
178                  "Adding an existing property should have failed\n");
179
180         /* Try to modify an existing property - should pass */
181         prop->value = "modify-property-data-should-pass";
182         prop->length = strlen(prop->value) + 1;
183         unittest(of_update_property(np, prop) == 0,
184                  "Updating an existing property should have passed\n");
185
186         /* Try to modify non-existent property - should pass*/
187         prop++;
188         prop->name = "modify-property";
189         prop->value = "modify-missing-property-data-should-pass";
190         prop->length = strlen(prop->value) + 1;
191         unittest(of_update_property(np, prop) == 0,
192                  "Updating a missing property should have passed\n");
193
194         /* Remove property - should pass */
195         unittest(of_remove_property(np, prop) == 0,
196                  "Removing a property should have passed\n");
197
198         /* Adding very large property - should pass */
199         prop++;
200         prop->name = "large-property-PAGE_SIZEx8";
201         prop->length = PAGE_SIZE * 8;
202         prop->value = kzalloc(prop->length, GFP_KERNEL);
203         unittest(prop->value != NULL, "Unable to allocate large buffer\n");
204         if (prop->value)
205                 unittest(of_add_property(np, prop) == 0,
206                          "Adding a large property should have passed\n");
207 }
208
209 static int __init of_unittest_check_node_linkage(struct device_node *np)
210 {
211         struct device_node *child;
212         int count = 0, rc;
213
214         for_each_child_of_node(np, child) {
215                 if (child->parent != np) {
216                         pr_err("Child node %pOFn links to wrong parent %pOFn\n",
217                                  child, np);
218                         rc = -EINVAL;
219                         goto put_child;
220                 }
221
222                 rc = of_unittest_check_node_linkage(child);
223                 if (rc < 0)
224                         goto put_child;
225                 count += rc;
226         }
227
228         return count + 1;
229 put_child:
230         of_node_put(child);
231         return rc;
232 }
233
234 static void __init of_unittest_check_tree_linkage(void)
235 {
236         struct device_node *np;
237         int allnode_count = 0, child_count;
238
239         if (!of_root)
240                 return;
241
242         for_each_of_allnodes(np)
243                 allnode_count++;
244         child_count = of_unittest_check_node_linkage(of_root);
245
246         unittest(child_count > 0, "Device node data structure is corrupted\n");
247         unittest(child_count == allnode_count,
248                  "allnodes list size (%i) doesn't match sibling lists size (%i)\n",
249                  allnode_count, child_count);
250         pr_debug("allnodes list size (%i); sibling lists size (%i)\n", allnode_count, child_count);
251 }
252
253 static void __init of_unittest_printf_one(struct device_node *np, const char *fmt,
254                                           const char *expected)
255 {
256         unsigned char *buf;
257         int buf_size;
258         int size, i;
259
260         buf_size = strlen(expected) + 10;
261         buf = kmalloc(buf_size, GFP_KERNEL);
262         if (!buf)
263                 return;
264
265         /* Baseline; check conversion with a large size limit */
266         memset(buf, 0xff, buf_size);
267         size = snprintf(buf, buf_size - 2, fmt, np);
268
269         /* use strcmp() instead of strncmp() here to be absolutely sure strings match */
270         unittest((strcmp(buf, expected) == 0) && (buf[size+1] == 0xff),
271                 "sprintf failed; fmt='%s' expected='%s' rslt='%s'\n",
272                 fmt, expected, buf);
273
274         /* Make sure length limits work */
275         size++;
276         for (i = 0; i < 2; i++, size--) {
277                 /* Clear the buffer, and make sure it works correctly still */
278                 memset(buf, 0xff, buf_size);
279                 snprintf(buf, size+1, fmt, np);
280                 unittest(strncmp(buf, expected, size) == 0 && (buf[size+1] == 0xff),
281                         "snprintf failed; size=%i fmt='%s' expected='%s' rslt='%s'\n",
282                         size, fmt, expected, buf);
283         }
284         kfree(buf);
285 }
286
287 static void __init of_unittest_printf(void)
288 {
289         struct device_node *np;
290         const char *full_name = "/testcase-data/platform-tests/test-device@1/dev@100";
291         char phandle_str[16] = "";
292
293         np = of_find_node_by_path(full_name);
294         if (!np) {
295                 unittest(np, "testcase data missing\n");
296                 return;
297         }
298
299         num_to_str(phandle_str, sizeof(phandle_str), np->phandle, 0);
300
301         of_unittest_printf_one(np, "%pOF",  full_name);
302         of_unittest_printf_one(np, "%pOFf", full_name);
303         of_unittest_printf_one(np, "%pOFn", "dev");
304         of_unittest_printf_one(np, "%2pOFn", "dev");
305         of_unittest_printf_one(np, "%5pOFn", "  dev");
306         of_unittest_printf_one(np, "%pOFnc", "dev:test-sub-device");
307         of_unittest_printf_one(np, "%pOFp", phandle_str);
308         of_unittest_printf_one(np, "%pOFP", "dev@100");
309         of_unittest_printf_one(np, "ABC %pOFP ABC", "ABC dev@100 ABC");
310         of_unittest_printf_one(np, "%10pOFP", "   dev@100");
311         of_unittest_printf_one(np, "%-10pOFP", "dev@100   ");
312         of_unittest_printf_one(of_root, "%pOFP", "/");
313         of_unittest_printf_one(np, "%pOFF", "----");
314         of_unittest_printf_one(np, "%pOFPF", "dev@100:----");
315         of_unittest_printf_one(np, "%pOFPFPc", "dev@100:----:dev@100:test-sub-device");
316         of_unittest_printf_one(np, "%pOFc", "test-sub-device");
317         of_unittest_printf_one(np, "%pOFC",
318                         "\"test-sub-device\",\"test-compat2\",\"test-compat3\"");
319 }
320
321 struct node_hash {
322         struct hlist_node node;
323         struct device_node *np;
324 };
325
326 static DEFINE_HASHTABLE(phandle_ht, 8);
327 static void __init of_unittest_check_phandles(void)
328 {
329         struct device_node *np;
330         struct node_hash *nh;
331         struct hlist_node *tmp;
332         int i, dup_count = 0, phandle_count = 0;
333
334         for_each_of_allnodes(np) {
335                 if (!np->phandle)
336                         continue;
337
338                 hash_for_each_possible(phandle_ht, nh, node, np->phandle) {
339                         if (nh->np->phandle == np->phandle) {
340                                 pr_info("Duplicate phandle! %i used by %pOF and %pOF\n",
341                                         np->phandle, nh->np, np);
342                                 dup_count++;
343                                 break;
344                         }
345                 }
346
347                 nh = kzalloc(sizeof(*nh), GFP_KERNEL);
348                 if (!nh)
349                         return;
350
351                 nh->np = np;
352                 hash_add(phandle_ht, &nh->node, np->phandle);
353                 phandle_count++;
354         }
355         unittest(dup_count == 0, "Found %i duplicates in %i phandles\n",
356                  dup_count, phandle_count);
357
358         /* Clean up */
359         hash_for_each_safe(phandle_ht, i, tmp, nh, node) {
360                 hash_del(&nh->node);
361                 kfree(nh);
362         }
363 }
364
365 static void __init of_unittest_parse_phandle_with_args(void)
366 {
367         struct device_node *np;
368         struct of_phandle_args args;
369         int i, rc;
370
371         np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
372         if (!np) {
373                 pr_err("missing testcase data\n");
374                 return;
375         }
376
377         rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
378         unittest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc);
379
380         for (i = 0; i < 8; i++) {
381                 bool passed = true;
382
383                 memset(&args, 0, sizeof(args));
384                 rc = of_parse_phandle_with_args(np, "phandle-list",
385                                                 "#phandle-cells", i, &args);
386
387                 /* Test the values from tests-phandle.dtsi */
388                 switch (i) {
389                 case 0:
390                         passed &= !rc;
391                         passed &= (args.args_count == 1);
392                         passed &= (args.args[0] == (i + 1));
393                         break;
394                 case 1:
395                         passed &= !rc;
396                         passed &= (args.args_count == 2);
397                         passed &= (args.args[0] == (i + 1));
398                         passed &= (args.args[1] == 0);
399                         break;
400                 case 2:
401                         passed &= (rc == -ENOENT);
402                         break;
403                 case 3:
404                         passed &= !rc;
405                         passed &= (args.args_count == 3);
406                         passed &= (args.args[0] == (i + 1));
407                         passed &= (args.args[1] == 4);
408                         passed &= (args.args[2] == 3);
409                         break;
410                 case 4:
411                         passed &= !rc;
412                         passed &= (args.args_count == 2);
413                         passed &= (args.args[0] == (i + 1));
414                         passed &= (args.args[1] == 100);
415                         break;
416                 case 5:
417                         passed &= !rc;
418                         passed &= (args.args_count == 0);
419                         break;
420                 case 6:
421                         passed &= !rc;
422                         passed &= (args.args_count == 1);
423                         passed &= (args.args[0] == (i + 1));
424                         break;
425                 case 7:
426                         passed &= (rc == -ENOENT);
427                         break;
428                 default:
429                         passed = false;
430                 }
431
432                 unittest(passed, "index %i - data error on node %pOF rc=%i\n",
433                          i, args.np, rc);
434         }
435
436         /* Check for missing list property */
437         memset(&args, 0, sizeof(args));
438         rc = of_parse_phandle_with_args(np, "phandle-list-missing",
439                                         "#phandle-cells", 0, &args);
440         unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
441         rc = of_count_phandle_with_args(np, "phandle-list-missing",
442                                         "#phandle-cells");
443         unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
444
445         /* Check for missing cells property */
446         memset(&args, 0, sizeof(args));
447         rc = of_parse_phandle_with_args(np, "phandle-list",
448                                         "#phandle-cells-missing", 0, &args);
449         unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
450         rc = of_count_phandle_with_args(np, "phandle-list",
451                                         "#phandle-cells-missing");
452         unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
453
454         /* Check for bad phandle in list */
455         memset(&args, 0, sizeof(args));
456         rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle",
457                                         "#phandle-cells", 0, &args);
458         unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
459         rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle",
460                                         "#phandle-cells");
461         unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
462
463         /* Check for incorrectly formed argument list */
464         memset(&args, 0, sizeof(args));
465         rc = of_parse_phandle_with_args(np, "phandle-list-bad-args",
466                                         "#phandle-cells", 1, &args);
467         unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
468         rc = of_count_phandle_with_args(np, "phandle-list-bad-args",
469                                         "#phandle-cells");
470         unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
471 }
472
473 static void __init of_unittest_parse_phandle_with_args_map(void)
474 {
475         struct device_node *np, *p0, *p1, *p2, *p3;
476         struct of_phandle_args args;
477         int i, rc;
478
479         np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-b");
480         if (!np) {
481                 pr_err("missing testcase data\n");
482                 return;
483         }
484
485         p0 = of_find_node_by_path("/testcase-data/phandle-tests/provider0");
486         if (!p0) {
487                 pr_err("missing testcase data\n");
488                 return;
489         }
490
491         p1 = of_find_node_by_path("/testcase-data/phandle-tests/provider1");
492         if (!p1) {
493                 pr_err("missing testcase data\n");
494                 return;
495         }
496
497         p2 = of_find_node_by_path("/testcase-data/phandle-tests/provider2");
498         if (!p2) {
499                 pr_err("missing testcase data\n");
500                 return;
501         }
502
503         p3 = of_find_node_by_path("/testcase-data/phandle-tests/provider3");
504         if (!p3) {
505                 pr_err("missing testcase data\n");
506                 return;
507         }
508
509         rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
510         unittest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc);
511
512         for (i = 0; i < 8; i++) {
513                 bool passed = true;
514
515                 memset(&args, 0, sizeof(args));
516                 rc = of_parse_phandle_with_args_map(np, "phandle-list",
517                                                     "phandle", i, &args);
518
519                 /* Test the values from tests-phandle.dtsi */
520                 switch (i) {
521                 case 0:
522                         passed &= !rc;
523                         passed &= (args.np == p1);
524                         passed &= (args.args_count == 1);
525                         passed &= (args.args[0] == 1);
526                         break;
527                 case 1:
528                         passed &= !rc;
529                         passed &= (args.np == p3);
530                         passed &= (args.args_count == 3);
531                         passed &= (args.args[0] == 2);
532                         passed &= (args.args[1] == 5);
533                         passed &= (args.args[2] == 3);
534                         break;
535                 case 2:
536                         passed &= (rc == -ENOENT);
537                         break;
538                 case 3:
539                         passed &= !rc;
540                         passed &= (args.np == p0);
541                         passed &= (args.args_count == 0);
542                         break;
543                 case 4:
544                         passed &= !rc;
545                         passed &= (args.np == p1);
546                         passed &= (args.args_count == 1);
547                         passed &= (args.args[0] == 3);
548                         break;
549                 case 5:
550                         passed &= !rc;
551                         passed &= (args.np == p0);
552                         passed &= (args.args_count == 0);
553                         break;
554                 case 6:
555                         passed &= !rc;
556                         passed &= (args.np == p2);
557                         passed &= (args.args_count == 2);
558                         passed &= (args.args[0] == 15);
559                         passed &= (args.args[1] == 0x20);
560                         break;
561                 case 7:
562                         passed &= (rc == -ENOENT);
563                         break;
564                 default:
565                         passed = false;
566                 }
567
568                 unittest(passed, "index %i - data error on node %s rc=%i\n",
569                          i, args.np->full_name, rc);
570         }
571
572         /* Check for missing list property */
573         memset(&args, 0, sizeof(args));
574         rc = of_parse_phandle_with_args_map(np, "phandle-list-missing",
575                                             "phandle", 0, &args);
576         unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
577
578         /* Check for missing cells,map,mask property */
579         memset(&args, 0, sizeof(args));
580         rc = of_parse_phandle_with_args_map(np, "phandle-list",
581                                             "phandle-missing", 0, &args);
582         unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
583
584         /* Check for bad phandle in list */
585         memset(&args, 0, sizeof(args));
586         rc = of_parse_phandle_with_args_map(np, "phandle-list-bad-phandle",
587                                             "phandle", 0, &args);
588         unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
589
590         /* Check for incorrectly formed argument list */
591         memset(&args, 0, sizeof(args));
592         rc = of_parse_phandle_with_args_map(np, "phandle-list-bad-args",
593                                             "phandle", 1, &args);
594         unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
595 }
596
597 static void __init of_unittest_property_string(void)
598 {
599         const char *strings[4];
600         struct device_node *np;
601         int rc;
602
603         np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
604         if (!np) {
605                 pr_err("No testcase data in device tree\n");
606                 return;
607         }
608
609         rc = of_property_match_string(np, "phandle-list-names", "first");
610         unittest(rc == 0, "first expected:0 got:%i\n", rc);
611         rc = of_property_match_string(np, "phandle-list-names", "second");
612         unittest(rc == 1, "second expected:1 got:%i\n", rc);
613         rc = of_property_match_string(np, "phandle-list-names", "third");
614         unittest(rc == 2, "third expected:2 got:%i\n", rc);
615         rc = of_property_match_string(np, "phandle-list-names", "fourth");
616         unittest(rc == -ENODATA, "unmatched string; rc=%i\n", rc);
617         rc = of_property_match_string(np, "missing-property", "blah");
618         unittest(rc == -EINVAL, "missing property; rc=%i\n", rc);
619         rc = of_property_match_string(np, "empty-property", "blah");
620         unittest(rc == -ENODATA, "empty property; rc=%i\n", rc);
621         rc = of_property_match_string(np, "unterminated-string", "blah");
622         unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
623
624         /* of_property_count_strings() tests */
625         rc = of_property_count_strings(np, "string-property");
626         unittest(rc == 1, "Incorrect string count; rc=%i\n", rc);
627         rc = of_property_count_strings(np, "phandle-list-names");
628         unittest(rc == 3, "Incorrect string count; rc=%i\n", rc);
629         rc = of_property_count_strings(np, "unterminated-string");
630         unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
631         rc = of_property_count_strings(np, "unterminated-string-list");
632         unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
633
634         /* of_property_read_string_index() tests */
635         rc = of_property_read_string_index(np, "string-property", 0, strings);
636         unittest(rc == 0 && !strcmp(strings[0], "foobar"), "of_property_read_string_index() failure; rc=%i\n", rc);
637         strings[0] = NULL;
638         rc = of_property_read_string_index(np, "string-property", 1, strings);
639         unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
640         rc = of_property_read_string_index(np, "phandle-list-names", 0, strings);
641         unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
642         rc = of_property_read_string_index(np, "phandle-list-names", 1, strings);
643         unittest(rc == 0 && !strcmp(strings[0], "second"), "of_property_read_string_index() failure; rc=%i\n", rc);
644         rc = of_property_read_string_index(np, "phandle-list-names", 2, strings);
645         unittest(rc == 0 && !strcmp(strings[0], "third"), "of_property_read_string_index() failure; rc=%i\n", rc);
646         strings[0] = NULL;
647         rc = of_property_read_string_index(np, "phandle-list-names", 3, strings);
648         unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
649         strings[0] = NULL;
650         rc = of_property_read_string_index(np, "unterminated-string", 0, strings);
651         unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
652         rc = of_property_read_string_index(np, "unterminated-string-list", 0, strings);
653         unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
654         strings[0] = NULL;
655         rc = of_property_read_string_index(np, "unterminated-string-list", 2, strings); /* should fail */
656         unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
657         strings[1] = NULL;
658
659         /* of_property_read_string_array() tests */
660         rc = of_property_read_string_array(np, "string-property", strings, 4);
661         unittest(rc == 1, "Incorrect string count; rc=%i\n", rc);
662         rc = of_property_read_string_array(np, "phandle-list-names", strings, 4);
663         unittest(rc == 3, "Incorrect string count; rc=%i\n", rc);
664         rc = of_property_read_string_array(np, "unterminated-string", strings, 4);
665         unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
666         /* -- An incorrectly formed string should cause a failure */
667         rc = of_property_read_string_array(np, "unterminated-string-list", strings, 4);
668         unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
669         /* -- parsing the correctly formed strings should still work: */
670         strings[2] = NULL;
671         rc = of_property_read_string_array(np, "unterminated-string-list", strings, 2);
672         unittest(rc == 2 && strings[2] == NULL, "of_property_read_string_array() failure; rc=%i\n", rc);
673         strings[1] = NULL;
674         rc = of_property_read_string_array(np, "phandle-list-names", strings, 1);
675         unittest(rc == 1 && strings[1] == NULL, "Overwrote end of string array; rc=%i, str='%s'\n", rc, strings[1]);
676 }
677
678 #define propcmp(p1, p2) (((p1)->length == (p2)->length) && \
679                         (p1)->value && (p2)->value && \
680                         !memcmp((p1)->value, (p2)->value, (p1)->length) && \
681                         !strcmp((p1)->name, (p2)->name))
682 static void __init of_unittest_property_copy(void)
683 {
684 #ifdef CONFIG_OF_DYNAMIC
685         struct property p1 = { .name = "p1", .length = 0, .value = "" };
686         struct property p2 = { .name = "p2", .length = 5, .value = "abcd" };
687         struct property *new;
688
689         new = __of_prop_dup(&p1, GFP_KERNEL);
690         unittest(new && propcmp(&p1, new), "empty property didn't copy correctly\n");
691         kfree(new->value);
692         kfree(new->name);
693         kfree(new);
694
695         new = __of_prop_dup(&p2, GFP_KERNEL);
696         unittest(new && propcmp(&p2, new), "non-empty property didn't copy correctly\n");
697         kfree(new->value);
698         kfree(new->name);
699         kfree(new);
700 #endif
701 }
702
703 static void __init of_unittest_changeset(void)
704 {
705 #ifdef CONFIG_OF_DYNAMIC
706         struct property *ppadd, padd = { .name = "prop-add", .length = 1, .value = "" };
707         struct property *ppname_n1,  pname_n1  = { .name = "name", .length = 3, .value = "n1"  };
708         struct property *ppname_n2,  pname_n2  = { .name = "name", .length = 3, .value = "n2"  };
709         struct property *ppname_n21, pname_n21 = { .name = "name", .length = 3, .value = "n21" };
710         struct property *ppupdate, pupdate = { .name = "prop-update", .length = 5, .value = "abcd" };
711         struct property *ppremove;
712         struct device_node *n1, *n2, *n21, *nchangeset, *nremove, *parent, *np;
713         struct of_changeset chgset;
714
715         n1 = __of_node_dup(NULL, "n1");
716         unittest(n1, "testcase setup failure\n");
717
718         n2 = __of_node_dup(NULL, "n2");
719         unittest(n2, "testcase setup failure\n");
720
721         n21 = __of_node_dup(NULL, "n21");
722         unittest(n21, "testcase setup failure %p\n", n21);
723
724         nchangeset = of_find_node_by_path("/testcase-data/changeset");
725         nremove = of_get_child_by_name(nchangeset, "node-remove");
726         unittest(nremove, "testcase setup failure\n");
727
728         ppadd = __of_prop_dup(&padd, GFP_KERNEL);
729         unittest(ppadd, "testcase setup failure\n");
730
731         ppname_n1  = __of_prop_dup(&pname_n1, GFP_KERNEL);
732         unittest(ppname_n1, "testcase setup failure\n");
733
734         ppname_n2  = __of_prop_dup(&pname_n2, GFP_KERNEL);
735         unittest(ppname_n2, "testcase setup failure\n");
736
737         ppname_n21 = __of_prop_dup(&pname_n21, GFP_KERNEL);
738         unittest(ppname_n21, "testcase setup failure\n");
739
740         ppupdate = __of_prop_dup(&pupdate, GFP_KERNEL);
741         unittest(ppupdate, "testcase setup failure\n");
742
743         parent = nchangeset;
744         n1->parent = parent;
745         n2->parent = parent;
746         n21->parent = n2;
747
748         ppremove = of_find_property(parent, "prop-remove", NULL);
749         unittest(ppremove, "failed to find removal prop");
750
751         of_changeset_init(&chgset);
752
753         unittest(!of_changeset_attach_node(&chgset, n1), "fail attach n1\n");
754         unittest(!of_changeset_add_property(&chgset, n1, ppname_n1), "fail add prop name\n");
755
756         unittest(!of_changeset_attach_node(&chgset, n2), "fail attach n2\n");
757         unittest(!of_changeset_add_property(&chgset, n2, ppname_n2), "fail add prop name\n");
758
759         unittest(!of_changeset_detach_node(&chgset, nremove), "fail remove node\n");
760         unittest(!of_changeset_add_property(&chgset, n21, ppname_n21), "fail add prop name\n");
761
762         unittest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n");
763
764         unittest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop prop-add\n");
765         unittest(!of_changeset_update_property(&chgset, parent, ppupdate), "fail update prop\n");
766         unittest(!of_changeset_remove_property(&chgset, parent, ppremove), "fail remove prop\n");
767
768         unittest(!of_changeset_apply(&chgset), "apply failed\n");
769
770         of_node_put(nchangeset);
771
772         /* Make sure node names are constructed correctly */
773         unittest((np = of_find_node_by_path("/testcase-data/changeset/n2/n21")),
774                  "'%pOF' not added\n", n21);
775         of_node_put(np);
776
777         unittest(!of_changeset_revert(&chgset), "revert failed\n");
778
779         of_changeset_destroy(&chgset);
780 #endif
781 }
782
783 static void __init of_unittest_dma_ranges_one(const char *path,
784                 u64 expect_dma_addr, u64 expect_paddr, u64 expect_size)
785 {
786         struct device_node *np;
787         u64 dma_addr, paddr, size;
788         int rc;
789
790         np = of_find_node_by_path(path);
791         if (!np) {
792                 pr_err("missing testcase data\n");
793                 return;
794         }
795
796         rc = of_dma_get_range(np, &dma_addr, &paddr, &size);
797
798         unittest(!rc, "of_dma_get_range failed on node %pOF rc=%i\n", np, rc);
799         if (!rc) {
800                 unittest(size == expect_size,
801                          "of_dma_get_range wrong size on node %pOF size=%llx\n", np, size);
802                 unittest(paddr == expect_paddr,
803                          "of_dma_get_range wrong phys addr (%llx) on node %pOF", paddr, np);
804                 unittest(dma_addr == expect_dma_addr,
805                          "of_dma_get_range wrong DMA addr (%llx) on node %pOF", dma_addr, np);
806         }
807         of_node_put(np);
808 }
809
810 static void __init of_unittest_parse_dma_ranges(void)
811 {
812         of_unittest_dma_ranges_one("/testcase-data/address-tests/device@70000000",
813                 0x0, 0x20000000, 0x40000000);
814         of_unittest_dma_ranges_one("/testcase-data/address-tests/bus@80000000/device@1000",
815                 0x10000000, 0x20000000, 0x40000000);
816         of_unittest_dma_ranges_one("/testcase-data/address-tests/pci@90000000",
817                 0x80000000, 0x20000000, 0x10000000);
818 }
819
820 static void __init of_unittest_pci_dma_ranges(void)
821 {
822         struct device_node *np;
823         struct of_pci_range range;
824         struct of_pci_range_parser parser;
825         int i = 0;
826
827         if (!IS_ENABLED(CONFIG_PCI))
828                 return;
829
830         np = of_find_node_by_path("/testcase-data/address-tests/pci@90000000");
831         if (!np) {
832                 pr_err("missing testcase data\n");
833                 return;
834         }
835
836         if (of_pci_dma_range_parser_init(&parser, np)) {
837                 pr_err("missing dma-ranges property\n");
838                 return;
839         }
840
841         /*
842          * Get the dma-ranges from the device tree
843          */
844         for_each_of_pci_range(&parser, &range) {
845                 if (!i) {
846                         unittest(range.size == 0x10000000,
847                                  "for_each_of_pci_range wrong size on node %pOF size=%llx\n",
848                                  np, range.size);
849                         unittest(range.cpu_addr == 0x20000000,
850                                  "for_each_of_pci_range wrong CPU addr (%llx) on node %pOF",
851                                  range.cpu_addr, np);
852                         unittest(range.pci_addr == 0x80000000,
853                                  "for_each_of_pci_range wrong DMA addr (%llx) on node %pOF",
854                                  range.pci_addr, np);
855                 } else {
856                         unittest(range.size == 0x10000000,
857                                  "for_each_of_pci_range wrong size on node %pOF size=%llx\n",
858                                  np, range.size);
859                         unittest(range.cpu_addr == 0x40000000,
860                                  "for_each_of_pci_range wrong CPU addr (%llx) on node %pOF",
861                                  range.cpu_addr, np);
862                         unittest(range.pci_addr == 0xc0000000,
863                                  "for_each_of_pci_range wrong DMA addr (%llx) on node %pOF",
864                                  range.pci_addr, np);
865                 }
866                 i++;
867         }
868
869         of_node_put(np);
870 }
871
872 static void __init of_unittest_parse_interrupts(void)
873 {
874         struct device_node *np;
875         struct of_phandle_args args;
876         int i, rc;
877
878         if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)
879                 return;
880
881         np = of_find_node_by_path("/testcase-data/interrupts/interrupts0");
882         if (!np) {
883                 pr_err("missing testcase data\n");
884                 return;
885         }
886
887         for (i = 0; i < 4; i++) {
888                 bool passed = true;
889
890                 memset(&args, 0, sizeof(args));
891                 rc = of_irq_parse_one(np, i, &args);
892
893                 passed &= !rc;
894                 passed &= (args.args_count == 1);
895                 passed &= (args.args[0] == (i + 1));
896
897                 unittest(passed, "index %i - data error on node %pOF rc=%i\n",
898                          i, args.np, rc);
899         }
900         of_node_put(np);
901
902         np = of_find_node_by_path("/testcase-data/interrupts/interrupts1");
903         if (!np) {
904                 pr_err("missing testcase data\n");
905                 return;
906         }
907
908         for (i = 0; i < 4; i++) {
909                 bool passed = true;
910
911                 memset(&args, 0, sizeof(args));
912                 rc = of_irq_parse_one(np, i, &args);
913
914                 /* Test the values from tests-phandle.dtsi */
915                 switch (i) {
916                 case 0:
917                         passed &= !rc;
918                         passed &= (args.args_count == 1);
919                         passed &= (args.args[0] == 9);
920                         break;
921                 case 1:
922                         passed &= !rc;
923                         passed &= (args.args_count == 3);
924                         passed &= (args.args[0] == 10);
925                         passed &= (args.args[1] == 11);
926                         passed &= (args.args[2] == 12);
927                         break;
928                 case 2:
929                         passed &= !rc;
930                         passed &= (args.args_count == 2);
931                         passed &= (args.args[0] == 13);
932                         passed &= (args.args[1] == 14);
933                         break;
934                 case 3:
935                         passed &= !rc;
936                         passed &= (args.args_count == 2);
937                         passed &= (args.args[0] == 15);
938                         passed &= (args.args[1] == 16);
939                         break;
940                 default:
941                         passed = false;
942                 }
943                 unittest(passed, "index %i - data error on node %pOF rc=%i\n",
944                          i, args.np, rc);
945         }
946         of_node_put(np);
947 }
948
949 static void __init of_unittest_parse_interrupts_extended(void)
950 {
951         struct device_node *np;
952         struct of_phandle_args args;
953         int i, rc;
954
955         if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)
956                 return;
957
958         np = of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0");
959         if (!np) {
960                 pr_err("missing testcase data\n");
961                 return;
962         }
963
964         for (i = 0; i < 7; i++) {
965                 bool passed = true;
966
967                 memset(&args, 0, sizeof(args));
968                 rc = of_irq_parse_one(np, i, &args);
969
970                 /* Test the values from tests-phandle.dtsi */
971                 switch (i) {
972                 case 0:
973                         passed &= !rc;
974                         passed &= (args.args_count == 1);
975                         passed &= (args.args[0] == 1);
976                         break;
977                 case 1:
978                         passed &= !rc;
979                         passed &= (args.args_count == 3);
980                         passed &= (args.args[0] == 2);
981                         passed &= (args.args[1] == 3);
982                         passed &= (args.args[2] == 4);
983                         break;
984                 case 2:
985                         passed &= !rc;
986                         passed &= (args.args_count == 2);
987                         passed &= (args.args[0] == 5);
988                         passed &= (args.args[1] == 6);
989                         break;
990                 case 3:
991                         passed &= !rc;
992                         passed &= (args.args_count == 1);
993                         passed &= (args.args[0] == 9);
994                         break;
995                 case 4:
996                         passed &= !rc;
997                         passed &= (args.args_count == 3);
998                         passed &= (args.args[0] == 10);
999                         passed &= (args.args[1] == 11);
1000                         passed &= (args.args[2] == 12);
1001                         break;
1002                 case 5:
1003                         passed &= !rc;
1004                         passed &= (args.args_count == 2);
1005                         passed &= (args.args[0] == 13);
1006                         passed &= (args.args[1] == 14);
1007                         break;
1008                 case 6:
1009                         passed &= !rc;
1010                         passed &= (args.args_count == 1);
1011                         passed &= (args.args[0] == 15);
1012                         break;
1013                 default:
1014                         passed = false;
1015                 }
1016
1017                 unittest(passed, "index %i - data error on node %pOF rc=%i\n",
1018                          i, args.np, rc);
1019         }
1020         of_node_put(np);
1021 }
1022
1023 static const struct of_device_id match_node_table[] = {
1024         { .data = "A", .name = "name0", }, /* Name alone is lowest priority */
1025         { .data = "B", .type = "type1", }, /* followed by type alone */
1026
1027         { .data = "Ca", .name = "name2", .type = "type1", }, /* followed by both together */
1028         { .data = "Cb", .name = "name2", }, /* Only match when type doesn't match */
1029         { .data = "Cc", .name = "name2", .type = "type2", },
1030
1031         { .data = "E", .compatible = "compat3" },
1032         { .data = "G", .compatible = "compat2", },
1033         { .data = "H", .compatible = "compat2", .name = "name5", },
1034         { .data = "I", .compatible = "compat2", .type = "type1", },
1035         { .data = "J", .compatible = "compat2", .type = "type1", .name = "name8", },
1036         { .data = "K", .compatible = "compat2", .name = "name9", },
1037         {}
1038 };
1039
1040 static struct {
1041         const char *path;
1042         const char *data;
1043 } match_node_tests[] = {
1044         { .path = "/testcase-data/match-node/name0", .data = "A", },
1045         { .path = "/testcase-data/match-node/name1", .data = "B", },
1046         { .path = "/testcase-data/match-node/a/name2", .data = "Ca", },
1047         { .path = "/testcase-data/match-node/b/name2", .data = "Cb", },
1048         { .path = "/testcase-data/match-node/c/name2", .data = "Cc", },
1049         { .path = "/testcase-data/match-node/name3", .data = "E", },
1050         { .path = "/testcase-data/match-node/name4", .data = "G", },
1051         { .path = "/testcase-data/match-node/name5", .data = "H", },
1052         { .path = "/testcase-data/match-node/name6", .data = "G", },
1053         { .path = "/testcase-data/match-node/name7", .data = "I", },
1054         { .path = "/testcase-data/match-node/name8", .data = "J", },
1055         { .path = "/testcase-data/match-node/name9", .data = "K", },
1056 };
1057
1058 static void __init of_unittest_match_node(void)
1059 {
1060         struct device_node *np;
1061         const struct of_device_id *match;
1062         int i;
1063
1064         for (i = 0; i < ARRAY_SIZE(match_node_tests); i++) {
1065                 np = of_find_node_by_path(match_node_tests[i].path);
1066                 if (!np) {
1067                         unittest(0, "missing testcase node %s\n",
1068                                 match_node_tests[i].path);
1069                         continue;
1070                 }
1071
1072                 match = of_match_node(match_node_table, np);
1073                 if (!match) {
1074                         unittest(0, "%s didn't match anything\n",
1075                                 match_node_tests[i].path);
1076                         continue;
1077                 }
1078
1079                 if (strcmp(match->data, match_node_tests[i].data) != 0) {
1080                         unittest(0, "%s got wrong match. expected %s, got %s\n",
1081                                 match_node_tests[i].path, match_node_tests[i].data,
1082                                 (const char *)match->data);
1083                         continue;
1084                 }
1085                 unittest(1, "passed");
1086         }
1087 }
1088
1089 static struct resource test_bus_res = {
1090         .start = 0xfffffff8,
1091         .end = 0xfffffff9,
1092         .flags = IORESOURCE_MEM,
1093 };
1094 static const struct platform_device_info test_bus_info = {
1095         .name = "unittest-bus",
1096 };
1097 static void __init of_unittest_platform_populate(void)
1098 {
1099         int irq, rc;
1100         struct device_node *np, *child, *grandchild;
1101         struct platform_device *pdev, *test_bus;
1102         const struct of_device_id match[] = {
1103                 { .compatible = "test-device", },
1104                 {}
1105         };
1106
1107         np = of_find_node_by_path("/testcase-data");
1108         of_platform_default_populate(np, NULL, NULL);
1109
1110         /* Test that a missing irq domain returns -EPROBE_DEFER */
1111         np = of_find_node_by_path("/testcase-data/testcase-device1");
1112         pdev = of_find_device_by_node(np);
1113         unittest(pdev, "device 1 creation failed\n");
1114
1115         if (!(of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)) {
1116                 irq = platform_get_irq(pdev, 0);
1117                 unittest(irq == -EPROBE_DEFER,
1118                          "device deferred probe failed - %d\n", irq);
1119
1120                 /* Test that a parsing failure does not return -EPROBE_DEFER */
1121                 np = of_find_node_by_path("/testcase-data/testcase-device2");
1122                 pdev = of_find_device_by_node(np);
1123                 unittest(pdev, "device 2 creation failed\n");
1124                 irq = platform_get_irq(pdev, 0);
1125                 unittest(irq < 0 && irq != -EPROBE_DEFER,
1126                          "device parsing error failed - %d\n", irq);
1127         }
1128
1129         np = of_find_node_by_path("/testcase-data/platform-tests");
1130         unittest(np, "No testcase data in device tree\n");
1131         if (!np)
1132                 return;
1133
1134         test_bus = platform_device_register_full(&test_bus_info);
1135         rc = PTR_ERR_OR_ZERO(test_bus);
1136         unittest(!rc, "testbus registration failed; rc=%i\n", rc);
1137         if (rc) {
1138                 of_node_put(np);
1139                 return;
1140         }
1141         test_bus->dev.of_node = np;
1142
1143         /*
1144          * Add a dummy resource to the test bus node after it is
1145          * registered to catch problems with un-inserted resources. The
1146          * DT code doesn't insert the resources, and it has caused the
1147          * kernel to oops in the past. This makes sure the same bug
1148          * doesn't crop up again.
1149          */
1150         platform_device_add_resources(test_bus, &test_bus_res, 1);
1151
1152         of_platform_populate(np, match, NULL, &test_bus->dev);
1153         for_each_child_of_node(np, child) {
1154                 for_each_child_of_node(child, grandchild)
1155                         unittest(of_find_device_by_node(grandchild),
1156                                  "Could not create device for node '%pOFn'\n",
1157                                  grandchild);
1158         }
1159
1160         of_platform_depopulate(&test_bus->dev);
1161         for_each_child_of_node(np, child) {
1162                 for_each_child_of_node(child, grandchild)
1163                         unittest(!of_find_device_by_node(grandchild),
1164                                  "device didn't get destroyed '%pOFn'\n",
1165                                  grandchild);
1166         }
1167
1168         platform_device_unregister(test_bus);
1169         of_node_put(np);
1170 }
1171
1172 /**
1173  *      update_node_properties - adds the properties
1174  *      of np into dup node (present in live tree) and
1175  *      updates parent of children of np to dup.
1176  *
1177  *      @np:    node whose properties are being added to the live tree
1178  *      @dup:   node present in live tree to be updated
1179  */
1180 static void update_node_properties(struct device_node *np,
1181                                         struct device_node *dup)
1182 {
1183         struct property *prop;
1184         struct property *save_next;
1185         struct device_node *child;
1186         int ret;
1187
1188         for_each_child_of_node(np, child)
1189                 child->parent = dup;
1190
1191         /*
1192          * "unittest internal error: unable to add testdata property"
1193          *
1194          *    If this message reports a property in node '/__symbols__' then
1195          *    the respective unittest overlay contains a label that has the
1196          *    same name as a label in the live devicetree.  The label will
1197          *    be in the live devicetree only if the devicetree source was
1198          *    compiled with the '-@' option.  If you encounter this error,
1199          *    please consider renaming __all__ of the labels in the unittest
1200          *    overlay dts files with an odd prefix that is unlikely to be
1201          *    used in a real devicetree.
1202          */
1203
1204         /*
1205          * open code for_each_property_of_node() because of_add_property()
1206          * sets prop->next to NULL
1207          */
1208         for (prop = np->properties; prop != NULL; prop = save_next) {
1209                 save_next = prop->next;
1210                 ret = of_add_property(dup, prop);
1211                 if (ret) {
1212                         if (ret == -EEXIST && !strcmp(prop->name, "name"))
1213                                 continue;
1214                         pr_err("unittest internal error: unable to add testdata property %pOF/%s",
1215                                np, prop->name);
1216                 }
1217         }
1218 }
1219
1220 /**
1221  *      attach_node_and_children - attaches nodes
1222  *      and its children to live tree.
1223  *      CAUTION: misleading function name - if node @np already exists in
1224  *      the live tree then children of @np are *not* attached to the live
1225  *      tree.  This works for the current test devicetree nodes because such
1226  *      nodes do not have child nodes.
1227  *
1228  *      @np:    Node to attach to live tree
1229  */
1230 static void attach_node_and_children(struct device_node *np)
1231 {
1232         struct device_node *next, *dup, *child;
1233         unsigned long flags;
1234         const char *full_name;
1235
1236         full_name = kasprintf(GFP_KERNEL, "%pOF", np);
1237
1238         if (!strcmp(full_name, "/__local_fixups__") ||
1239             !strcmp(full_name, "/__fixups__")) {
1240                 kfree(full_name);
1241                 return;
1242         }
1243
1244         dup = of_find_node_by_path(full_name);
1245         kfree(full_name);
1246         if (dup) {
1247                 update_node_properties(np, dup);
1248                 return;
1249         }
1250
1251         child = np->child;
1252         np->child = NULL;
1253
1254         mutex_lock(&of_mutex);
1255         raw_spin_lock_irqsave(&devtree_lock, flags);
1256         np->sibling = np->parent->child;
1257         np->parent->child = np;
1258         of_node_clear_flag(np, OF_DETACHED);
1259         raw_spin_unlock_irqrestore(&devtree_lock, flags);
1260
1261         __of_attach_node_sysfs(np);
1262         mutex_unlock(&of_mutex);
1263
1264         while (child) {
1265                 next = child->sibling;
1266                 attach_node_and_children(child);
1267                 child = next;
1268         }
1269 }
1270
1271 /**
1272  *      unittest_data_add - Reads, copies data from
1273  *      linked tree and attaches it to the live tree
1274  */
1275 static int __init unittest_data_add(void)
1276 {
1277         void *unittest_data;
1278         struct device_node *unittest_data_node, *np;
1279         /*
1280          * __dtb_testcases_begin[] and __dtb_testcases_end[] are magically
1281          * created by cmd_dt_S_dtb in scripts/Makefile.lib
1282          */
1283         extern uint8_t __dtb_testcases_begin[];
1284         extern uint8_t __dtb_testcases_end[];
1285         const int size = __dtb_testcases_end - __dtb_testcases_begin;
1286         int rc;
1287
1288         if (!size) {
1289                 pr_warn("%s: No testcase data to attach; not running tests\n",
1290                         __func__);
1291                 return -ENODATA;
1292         }
1293
1294         /* creating copy */
1295         unittest_data = kmemdup(__dtb_testcases_begin, size, GFP_KERNEL);
1296         if (!unittest_data)
1297                 return -ENOMEM;
1298
1299         of_fdt_unflatten_tree(unittest_data, NULL, &unittest_data_node);
1300         if (!unittest_data_node) {
1301                 pr_warn("%s: No tree to attach; not running tests\n", __func__);
1302                 kfree(unittest_data);
1303                 return -ENODATA;
1304         }
1305
1306         /*
1307          * This lock normally encloses of_resolve_phandles()
1308          */
1309         of_overlay_mutex_lock();
1310
1311         rc = of_resolve_phandles(unittest_data_node);
1312         if (rc) {
1313                 pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__, rc);
1314                 of_overlay_mutex_unlock();
1315                 return -EINVAL;
1316         }
1317
1318         if (!of_root) {
1319                 of_root = unittest_data_node;
1320                 for_each_of_allnodes(np)
1321                         __of_attach_node_sysfs(np);
1322                 of_aliases = of_find_node_by_path("/aliases");
1323                 of_chosen = of_find_node_by_path("/chosen");
1324                 of_overlay_mutex_unlock();
1325                 return 0;
1326         }
1327
1328         /* attach the sub-tree to live tree */
1329         np = unittest_data_node->child;
1330         while (np) {
1331                 struct device_node *next = np->sibling;
1332
1333                 np->parent = of_root;
1334                 attach_node_and_children(np);
1335                 np = next;
1336         }
1337
1338         of_overlay_mutex_unlock();
1339
1340         return 0;
1341 }
1342
1343 #ifdef CONFIG_OF_OVERLAY
1344 static int __init overlay_data_apply(const char *overlay_name, int *overlay_id);
1345
1346 static int unittest_probe(struct platform_device *pdev)
1347 {
1348         struct device *dev = &pdev->dev;
1349         struct device_node *np = dev->of_node;
1350
1351         if (np == NULL) {
1352                 dev_err(dev, "No OF data for device\n");
1353                 return -EINVAL;
1354
1355         }
1356
1357         dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
1358
1359         of_platform_populate(np, NULL, NULL, &pdev->dev);
1360
1361         return 0;
1362 }
1363
1364 static int unittest_remove(struct platform_device *pdev)
1365 {
1366         struct device *dev = &pdev->dev;
1367         struct device_node *np = dev->of_node;
1368
1369         dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
1370         return 0;
1371 }
1372
1373 static const struct of_device_id unittest_match[] = {
1374         { .compatible = "unittest", },
1375         {},
1376 };
1377
1378 static struct platform_driver unittest_driver = {
1379         .probe                  = unittest_probe,
1380         .remove                 = unittest_remove,
1381         .driver = {
1382                 .name           = "unittest",
1383                 .of_match_table = of_match_ptr(unittest_match),
1384         },
1385 };
1386
1387 /* get the platform device instantiated at the path */
1388 static struct platform_device *of_path_to_platform_device(const char *path)
1389 {
1390         struct device_node *np;
1391         struct platform_device *pdev;
1392
1393         np = of_find_node_by_path(path);
1394         if (np == NULL)
1395                 return NULL;
1396
1397         pdev = of_find_device_by_node(np);
1398         of_node_put(np);
1399
1400         return pdev;
1401 }
1402
1403 /* find out if a platform device exists at that path */
1404 static int of_path_platform_device_exists(const char *path)
1405 {
1406         struct platform_device *pdev;
1407
1408         pdev = of_path_to_platform_device(path);
1409         platform_device_put(pdev);
1410         return pdev != NULL;
1411 }
1412
1413 #if IS_BUILTIN(CONFIG_I2C)
1414
1415 /* get the i2c client device instantiated at the path */
1416 static struct i2c_client *of_path_to_i2c_client(const char *path)
1417 {
1418         struct device_node *np;
1419         struct i2c_client *client;
1420
1421         np = of_find_node_by_path(path);
1422         if (np == NULL)
1423                 return NULL;
1424
1425         client = of_find_i2c_device_by_node(np);
1426         of_node_put(np);
1427
1428         return client;
1429 }
1430
1431 /* find out if a i2c client device exists at that path */
1432 static int of_path_i2c_client_exists(const char *path)
1433 {
1434         struct i2c_client *client;
1435
1436         client = of_path_to_i2c_client(path);
1437         if (client)
1438                 put_device(&client->dev);
1439         return client != NULL;
1440 }
1441 #else
1442 static int of_path_i2c_client_exists(const char *path)
1443 {
1444         return 0;
1445 }
1446 #endif
1447
1448 enum overlay_type {
1449         PDEV_OVERLAY,
1450         I2C_OVERLAY
1451 };
1452
1453 static int of_path_device_type_exists(const char *path,
1454                 enum overlay_type ovtype)
1455 {
1456         switch (ovtype) {
1457         case PDEV_OVERLAY:
1458                 return of_path_platform_device_exists(path);
1459         case I2C_OVERLAY:
1460                 return of_path_i2c_client_exists(path);
1461         }
1462         return 0;
1463 }
1464
1465 static const char *unittest_path(int nr, enum overlay_type ovtype)
1466 {
1467         const char *base;
1468         static char buf[256];
1469
1470         switch (ovtype) {
1471         case PDEV_OVERLAY:
1472                 base = "/testcase-data/overlay-node/test-bus";
1473                 break;
1474         case I2C_OVERLAY:
1475                 base = "/testcase-data/overlay-node/test-bus/i2c-test-bus";
1476                 break;
1477         default:
1478                 buf[0] = '\0';
1479                 return buf;
1480         }
1481         snprintf(buf, sizeof(buf) - 1, "%s/test-unittest%d", base, nr);
1482         buf[sizeof(buf) - 1] = '\0';
1483         return buf;
1484 }
1485
1486 static int of_unittest_device_exists(int unittest_nr, enum overlay_type ovtype)
1487 {
1488         const char *path;
1489
1490         path = unittest_path(unittest_nr, ovtype);
1491
1492         switch (ovtype) {
1493         case PDEV_OVERLAY:
1494                 return of_path_platform_device_exists(path);
1495         case I2C_OVERLAY:
1496                 return of_path_i2c_client_exists(path);
1497         }
1498         return 0;
1499 }
1500
1501 static const char *overlay_name_from_nr(int nr)
1502 {
1503         static char buf[256];
1504
1505         snprintf(buf, sizeof(buf) - 1,
1506                 "overlay_%d", nr);
1507         buf[sizeof(buf) - 1] = '\0';
1508
1509         return buf;
1510 }
1511
1512 static const char *bus_path = "/testcase-data/overlay-node/test-bus";
1513
1514 /* it is guaranteed that overlay ids are assigned in sequence */
1515 #define MAX_UNITTEST_OVERLAYS   256
1516 static unsigned long overlay_id_bits[BITS_TO_LONGS(MAX_UNITTEST_OVERLAYS)];
1517 static int overlay_first_id = -1;
1518
1519 static void of_unittest_track_overlay(int id)
1520 {
1521         if (overlay_first_id < 0)
1522                 overlay_first_id = id;
1523         id -= overlay_first_id;
1524
1525         /* we shouldn't need that many */
1526         BUG_ON(id >= MAX_UNITTEST_OVERLAYS);
1527         overlay_id_bits[BIT_WORD(id)] |= BIT_MASK(id);
1528 }
1529
1530 static void of_unittest_untrack_overlay(int id)
1531 {
1532         if (overlay_first_id < 0)
1533                 return;
1534         id -= overlay_first_id;
1535         BUG_ON(id >= MAX_UNITTEST_OVERLAYS);
1536         overlay_id_bits[BIT_WORD(id)] &= ~BIT_MASK(id);
1537 }
1538
1539 static void of_unittest_destroy_tracked_overlays(void)
1540 {
1541         int id, ret, defers, ovcs_id;
1542
1543         if (overlay_first_id < 0)
1544                 return;
1545
1546         /* try until no defers */
1547         do {
1548                 defers = 0;
1549                 /* remove in reverse order */
1550                 for (id = MAX_UNITTEST_OVERLAYS - 1; id >= 0; id--) {
1551                         if (!(overlay_id_bits[BIT_WORD(id)] & BIT_MASK(id)))
1552                                 continue;
1553
1554                         ovcs_id = id + overlay_first_id;
1555                         ret = of_overlay_remove(&ovcs_id);
1556                         if (ret == -ENODEV) {
1557                                 pr_warn("%s: no overlay to destroy for #%d\n",
1558                                         __func__, id + overlay_first_id);
1559                                 continue;
1560                         }
1561                         if (ret != 0) {
1562                                 defers++;
1563                                 pr_warn("%s: overlay destroy failed for #%d\n",
1564                                         __func__, id + overlay_first_id);
1565                                 continue;
1566                         }
1567
1568                         overlay_id_bits[BIT_WORD(id)] &= ~BIT_MASK(id);
1569                 }
1570         } while (defers > 0);
1571 }
1572
1573 static int __init of_unittest_apply_overlay(int overlay_nr, int *overlay_id)
1574 {
1575         const char *overlay_name;
1576
1577         overlay_name = overlay_name_from_nr(overlay_nr);
1578
1579         if (!overlay_data_apply(overlay_name, overlay_id)) {
1580                 unittest(0, "could not apply overlay \"%s\"\n",
1581                                 overlay_name);
1582                 return -EFAULT;
1583         }
1584         of_unittest_track_overlay(*overlay_id);
1585
1586         return 0;
1587 }
1588
1589 /* apply an overlay while checking before and after states */
1590 static int __init of_unittest_apply_overlay_check(int overlay_nr,
1591                 int unittest_nr, int before, int after,
1592                 enum overlay_type ovtype)
1593 {
1594         int ret, ovcs_id;
1595
1596         /* unittest device must not be in before state */
1597         if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
1598                 unittest(0, "%s with device @\"%s\" %s\n",
1599                                 overlay_name_from_nr(overlay_nr),
1600                                 unittest_path(unittest_nr, ovtype),
1601                                 !before ? "enabled" : "disabled");
1602                 return -EINVAL;
1603         }
1604
1605         ovcs_id = 0;
1606         ret = of_unittest_apply_overlay(overlay_nr, &ovcs_id);
1607         if (ret != 0) {
1608                 /* of_unittest_apply_overlay already called unittest() */
1609                 return ret;
1610         }
1611
1612         /* unittest device must be to set to after state */
1613         if (of_unittest_device_exists(unittest_nr, ovtype) != after) {
1614                 unittest(0, "%s failed to create @\"%s\" %s\n",
1615                                 overlay_name_from_nr(overlay_nr),
1616                                 unittest_path(unittest_nr, ovtype),
1617                                 !after ? "enabled" : "disabled");
1618                 return -EINVAL;
1619         }
1620
1621         return 0;
1622 }
1623
1624 /* apply an overlay and then revert it while checking before, after states */
1625 static int __init of_unittest_apply_revert_overlay_check(int overlay_nr,
1626                 int unittest_nr, int before, int after,
1627                 enum overlay_type ovtype)
1628 {
1629         int ret, ovcs_id;
1630
1631         /* unittest device must be in before state */
1632         if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
1633                 unittest(0, "%s with device @\"%s\" %s\n",
1634                                 overlay_name_from_nr(overlay_nr),
1635                                 unittest_path(unittest_nr, ovtype),
1636                                 !before ? "enabled" : "disabled");
1637                 return -EINVAL;
1638         }
1639
1640         /* apply the overlay */
1641         ovcs_id = 0;
1642         ret = of_unittest_apply_overlay(overlay_nr, &ovcs_id);
1643         if (ret != 0) {
1644                 /* of_unittest_apply_overlay already called unittest() */
1645                 return ret;
1646         }
1647
1648         /* unittest device must be in after state */
1649         if (of_unittest_device_exists(unittest_nr, ovtype) != after) {
1650                 unittest(0, "%s failed to create @\"%s\" %s\n",
1651                                 overlay_name_from_nr(overlay_nr),
1652                                 unittest_path(unittest_nr, ovtype),
1653                                 !after ? "enabled" : "disabled");
1654                 return -EINVAL;
1655         }
1656
1657         ret = of_overlay_remove(&ovcs_id);
1658         if (ret != 0) {
1659                 unittest(0, "%s failed to be destroyed @\"%s\"\n",
1660                                 overlay_name_from_nr(overlay_nr),
1661                                 unittest_path(unittest_nr, ovtype));
1662                 return ret;
1663         }
1664
1665         /* unittest device must be again in before state */
1666         if (of_unittest_device_exists(unittest_nr, PDEV_OVERLAY) != before) {
1667                 unittest(0, "%s with device @\"%s\" %s\n",
1668                                 overlay_name_from_nr(overlay_nr),
1669                                 unittest_path(unittest_nr, ovtype),
1670                                 !before ? "enabled" : "disabled");
1671                 return -EINVAL;
1672         }
1673
1674         return 0;
1675 }
1676
1677 /* test activation of device */
1678 static void __init of_unittest_overlay_0(void)
1679 {
1680         /* device should enable */
1681         if (of_unittest_apply_overlay_check(0, 0, 0, 1, PDEV_OVERLAY))
1682                 return;
1683
1684         unittest(1, "overlay test %d passed\n", 0);
1685 }
1686
1687 /* test deactivation of device */
1688 static void __init of_unittest_overlay_1(void)
1689 {
1690         /* device should disable */
1691         if (of_unittest_apply_overlay_check(1, 1, 1, 0, PDEV_OVERLAY))
1692                 return;
1693
1694         unittest(1, "overlay test %d passed\n", 1);
1695 }
1696
1697 /* test activation of device */
1698 static void __init of_unittest_overlay_2(void)
1699 {
1700         /* device should enable */
1701         if (of_unittest_apply_overlay_check(2, 2, 0, 1, PDEV_OVERLAY))
1702                 return;
1703
1704         unittest(1, "overlay test %d passed\n", 2);
1705 }
1706
1707 /* test deactivation of device */
1708 static void __init of_unittest_overlay_3(void)
1709 {
1710         /* device should disable */
1711         if (of_unittest_apply_overlay_check(3, 3, 1, 0, PDEV_OVERLAY))
1712                 return;
1713
1714         unittest(1, "overlay test %d passed\n", 3);
1715 }
1716
1717 /* test activation of a full device node */
1718 static void __init of_unittest_overlay_4(void)
1719 {
1720         /* device should disable */
1721         if (of_unittest_apply_overlay_check(4, 4, 0, 1, PDEV_OVERLAY))
1722                 return;
1723
1724         unittest(1, "overlay test %d passed\n", 4);
1725 }
1726
1727 /* test overlay apply/revert sequence */
1728 static void __init of_unittest_overlay_5(void)
1729 {
1730         /* device should disable */
1731         if (of_unittest_apply_revert_overlay_check(5, 5, 0, 1, PDEV_OVERLAY))
1732                 return;
1733
1734         unittest(1, "overlay test %d passed\n", 5);
1735 }
1736
1737 /* test overlay application in sequence */
1738 static void __init of_unittest_overlay_6(void)
1739 {
1740         int i, ov_id[2], ovcs_id;
1741         int overlay_nr = 6, unittest_nr = 6;
1742         int before = 0, after = 1;
1743         const char *overlay_name;
1744
1745         /* unittest device must be in before state */
1746         for (i = 0; i < 2; i++) {
1747                 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
1748                                 != before) {
1749                         unittest(0, "%s with device @\"%s\" %s\n",
1750                                         overlay_name_from_nr(overlay_nr + i),
1751                                         unittest_path(unittest_nr + i,
1752                                                 PDEV_OVERLAY),
1753                                         !before ? "enabled" : "disabled");
1754                         return;
1755                 }
1756         }
1757
1758         /* apply the overlays */
1759         for (i = 0; i < 2; i++) {
1760
1761                 overlay_name = overlay_name_from_nr(overlay_nr + i);
1762
1763                 if (!overlay_data_apply(overlay_name, &ovcs_id)) {
1764                         unittest(0, "could not apply overlay \"%s\"\n",
1765                                         overlay_name);
1766                         return;
1767                 }
1768                 ov_id[i] = ovcs_id;
1769                 of_unittest_track_overlay(ov_id[i]);
1770         }
1771
1772         for (i = 0; i < 2; i++) {
1773                 /* unittest device must be in after state */
1774                 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
1775                                 != after) {
1776                         unittest(0, "overlay @\"%s\" failed @\"%s\" %s\n",
1777                                         overlay_name_from_nr(overlay_nr + i),
1778                                         unittest_path(unittest_nr + i,
1779                                                 PDEV_OVERLAY),
1780                                         !after ? "enabled" : "disabled");
1781                         return;
1782                 }
1783         }
1784
1785         for (i = 1; i >= 0; i--) {
1786                 ovcs_id = ov_id[i];
1787                 if (of_overlay_remove(&ovcs_id)) {
1788                         unittest(0, "%s failed destroy @\"%s\"\n",
1789                                         overlay_name_from_nr(overlay_nr + i),
1790                                         unittest_path(unittest_nr + i,
1791                                                 PDEV_OVERLAY));
1792                         return;
1793                 }
1794                 of_unittest_untrack_overlay(ov_id[i]);
1795         }
1796
1797         for (i = 0; i < 2; i++) {
1798                 /* unittest device must be again in before state */
1799                 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
1800                                 != before) {
1801                         unittest(0, "%s with device @\"%s\" %s\n",
1802                                         overlay_name_from_nr(overlay_nr + i),
1803                                         unittest_path(unittest_nr + i,
1804                                                 PDEV_OVERLAY),
1805                                         !before ? "enabled" : "disabled");
1806                         return;
1807                 }
1808         }
1809
1810         unittest(1, "overlay test %d passed\n", 6);
1811 }
1812
1813 /* test overlay application in sequence */
1814 static void __init of_unittest_overlay_8(void)
1815 {
1816         int i, ov_id[2], ovcs_id;
1817         int overlay_nr = 8, unittest_nr = 8;
1818         const char *overlay_name;
1819
1820         /* we don't care about device state in this test */
1821
1822         /* apply the overlays */
1823         for (i = 0; i < 2; i++) {
1824
1825                 overlay_name = overlay_name_from_nr(overlay_nr + i);
1826
1827                 if (!overlay_data_apply(overlay_name, &ovcs_id)) {
1828                         unittest(0, "could not apply overlay \"%s\"\n",
1829                                         overlay_name);
1830                         return;
1831                 }
1832                 ov_id[i] = ovcs_id;
1833                 of_unittest_track_overlay(ov_id[i]);
1834         }
1835
1836         /* now try to remove first overlay (it should fail) */
1837         ovcs_id = ov_id[0];
1838         if (!of_overlay_remove(&ovcs_id)) {
1839                 unittest(0, "%s was destroyed @\"%s\"\n",
1840                                 overlay_name_from_nr(overlay_nr + 0),
1841                                 unittest_path(unittest_nr,
1842                                         PDEV_OVERLAY));
1843                 return;
1844         }
1845
1846         /* removing them in order should work */
1847         for (i = 1; i >= 0; i--) {
1848                 ovcs_id = ov_id[i];
1849                 if (of_overlay_remove(&ovcs_id)) {
1850                         unittest(0, "%s not destroyed @\"%s\"\n",
1851                                         overlay_name_from_nr(overlay_nr + i),
1852                                         unittest_path(unittest_nr,
1853                                                 PDEV_OVERLAY));
1854                         return;
1855                 }
1856                 of_unittest_untrack_overlay(ov_id[i]);
1857         }
1858
1859         unittest(1, "overlay test %d passed\n", 8);
1860 }
1861
1862 /* test insertion of a bus with parent devices */
1863 static void __init of_unittest_overlay_10(void)
1864 {
1865         int ret;
1866         char *child_path;
1867
1868         /* device should disable */
1869         ret = of_unittest_apply_overlay_check(10, 10, 0, 1, PDEV_OVERLAY);
1870         if (unittest(ret == 0,
1871                         "overlay test %d failed; overlay application\n", 10))
1872                 return;
1873
1874         child_path = kasprintf(GFP_KERNEL, "%s/test-unittest101",
1875                         unittest_path(10, PDEV_OVERLAY));
1876         if (unittest(child_path, "overlay test %d failed; kasprintf\n", 10))
1877                 return;
1878
1879         ret = of_path_device_type_exists(child_path, PDEV_OVERLAY);
1880         kfree(child_path);
1881
1882         unittest(ret, "overlay test %d failed; no child device\n", 10);
1883 }
1884
1885 /* test insertion of a bus with parent devices (and revert) */
1886 static void __init of_unittest_overlay_11(void)
1887 {
1888         int ret;
1889
1890         /* device should disable */
1891         ret = of_unittest_apply_revert_overlay_check(11, 11, 0, 1,
1892                         PDEV_OVERLAY);
1893         unittest(ret == 0, "overlay test %d failed; overlay apply\n", 11);
1894 }
1895
1896 #if IS_BUILTIN(CONFIG_I2C) && IS_ENABLED(CONFIG_OF_OVERLAY)
1897
1898 struct unittest_i2c_bus_data {
1899         struct platform_device  *pdev;
1900         struct i2c_adapter      adap;
1901 };
1902
1903 static int unittest_i2c_master_xfer(struct i2c_adapter *adap,
1904                 struct i2c_msg *msgs, int num)
1905 {
1906         struct unittest_i2c_bus_data *std = i2c_get_adapdata(adap);
1907
1908         (void)std;
1909
1910         return num;
1911 }
1912
1913 static u32 unittest_i2c_functionality(struct i2c_adapter *adap)
1914 {
1915         return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
1916 }
1917
1918 static const struct i2c_algorithm unittest_i2c_algo = {
1919         .master_xfer    = unittest_i2c_master_xfer,
1920         .functionality  = unittest_i2c_functionality,
1921 };
1922
1923 static int unittest_i2c_bus_probe(struct platform_device *pdev)
1924 {
1925         struct device *dev = &pdev->dev;
1926         struct device_node *np = dev->of_node;
1927         struct unittest_i2c_bus_data *std;
1928         struct i2c_adapter *adap;
1929         int ret;
1930
1931         if (np == NULL) {
1932                 dev_err(dev, "No OF data for device\n");
1933                 return -EINVAL;
1934
1935         }
1936
1937         dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
1938
1939         std = devm_kzalloc(dev, sizeof(*std), GFP_KERNEL);
1940         if (!std)
1941                 return -ENOMEM;
1942
1943         /* link them together */
1944         std->pdev = pdev;
1945         platform_set_drvdata(pdev, std);
1946
1947         adap = &std->adap;
1948         i2c_set_adapdata(adap, std);
1949         adap->nr = -1;
1950         strlcpy(adap->name, pdev->name, sizeof(adap->name));
1951         adap->class = I2C_CLASS_DEPRECATED;
1952         adap->algo = &unittest_i2c_algo;
1953         adap->dev.parent = dev;
1954         adap->dev.of_node = dev->of_node;
1955         adap->timeout = 5 * HZ;
1956         adap->retries = 3;
1957
1958         ret = i2c_add_numbered_adapter(adap);
1959         if (ret != 0) {
1960                 dev_err(dev, "Failed to add I2C adapter\n");
1961                 return ret;
1962         }
1963
1964         return 0;
1965 }
1966
1967 static int unittest_i2c_bus_remove(struct platform_device *pdev)
1968 {
1969         struct device *dev = &pdev->dev;
1970         struct device_node *np = dev->of_node;
1971         struct unittest_i2c_bus_data *std = platform_get_drvdata(pdev);
1972
1973         dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
1974         i2c_del_adapter(&std->adap);
1975
1976         return 0;
1977 }
1978
1979 static const struct of_device_id unittest_i2c_bus_match[] = {
1980         { .compatible = "unittest-i2c-bus", },
1981         {},
1982 };
1983
1984 static struct platform_driver unittest_i2c_bus_driver = {
1985         .probe                  = unittest_i2c_bus_probe,
1986         .remove                 = unittest_i2c_bus_remove,
1987         .driver = {
1988                 .name           = "unittest-i2c-bus",
1989                 .of_match_table = of_match_ptr(unittest_i2c_bus_match),
1990         },
1991 };
1992
1993 static int unittest_i2c_dev_probe(struct i2c_client *client,
1994                 const struct i2c_device_id *id)
1995 {
1996         struct device *dev = &client->dev;
1997         struct device_node *np = client->dev.of_node;
1998
1999         if (!np) {
2000                 dev_err(dev, "No OF node\n");
2001                 return -EINVAL;
2002         }
2003
2004         dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
2005
2006         return 0;
2007 };
2008
2009 static int unittest_i2c_dev_remove(struct i2c_client *client)
2010 {
2011         struct device *dev = &client->dev;
2012         struct device_node *np = client->dev.of_node;
2013
2014         dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
2015         return 0;
2016 }
2017
2018 static const struct i2c_device_id unittest_i2c_dev_id[] = {
2019         { .name = "unittest-i2c-dev" },
2020         { }
2021 };
2022
2023 static struct i2c_driver unittest_i2c_dev_driver = {
2024         .driver = {
2025                 .name = "unittest-i2c-dev",
2026         },
2027         .probe = unittest_i2c_dev_probe,
2028         .remove = unittest_i2c_dev_remove,
2029         .id_table = unittest_i2c_dev_id,
2030 };
2031
2032 #if IS_BUILTIN(CONFIG_I2C_MUX)
2033
2034 static int unittest_i2c_mux_select_chan(struct i2c_mux_core *muxc, u32 chan)
2035 {
2036         return 0;
2037 }
2038
2039 static int unittest_i2c_mux_probe(struct i2c_client *client,
2040                 const struct i2c_device_id *id)
2041 {
2042         int i, nchans;
2043         struct device *dev = &client->dev;
2044         struct i2c_adapter *adap = client->adapter;
2045         struct device_node *np = client->dev.of_node, *child;
2046         struct i2c_mux_core *muxc;
2047         u32 reg, max_reg;
2048
2049         dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
2050
2051         if (!np) {
2052                 dev_err(dev, "No OF node\n");
2053                 return -EINVAL;
2054         }
2055
2056         max_reg = (u32)-1;
2057         for_each_child_of_node(np, child) {
2058                 if (of_property_read_u32(child, "reg", &reg))
2059                         continue;
2060                 if (max_reg == (u32)-1 || reg > max_reg)
2061                         max_reg = reg;
2062         }
2063         nchans = max_reg == (u32)-1 ? 0 : max_reg + 1;
2064         if (nchans == 0) {
2065                 dev_err(dev, "No channels\n");
2066                 return -EINVAL;
2067         }
2068
2069         muxc = i2c_mux_alloc(adap, dev, nchans, 0, 0,
2070                              unittest_i2c_mux_select_chan, NULL);
2071         if (!muxc)
2072                 return -ENOMEM;
2073         for (i = 0; i < nchans; i++) {
2074                 if (i2c_mux_add_adapter(muxc, 0, i, 0)) {
2075                         dev_err(dev, "Failed to register mux #%d\n", i);
2076                         i2c_mux_del_adapters(muxc);
2077                         return -ENODEV;
2078                 }
2079         }
2080
2081         i2c_set_clientdata(client, muxc);
2082
2083         return 0;
2084 };
2085
2086 static int unittest_i2c_mux_remove(struct i2c_client *client)
2087 {
2088         struct device *dev = &client->dev;
2089         struct device_node *np = client->dev.of_node;
2090         struct i2c_mux_core *muxc = i2c_get_clientdata(client);
2091
2092         dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
2093         i2c_mux_del_adapters(muxc);
2094         return 0;
2095 }
2096
2097 static const struct i2c_device_id unittest_i2c_mux_id[] = {
2098         { .name = "unittest-i2c-mux" },
2099         { }
2100 };
2101
2102 static struct i2c_driver unittest_i2c_mux_driver = {
2103         .driver = {
2104                 .name = "unittest-i2c-mux",
2105         },
2106         .probe = unittest_i2c_mux_probe,
2107         .remove = unittest_i2c_mux_remove,
2108         .id_table = unittest_i2c_mux_id,
2109 };
2110
2111 #endif
2112
2113 static int of_unittest_overlay_i2c_init(void)
2114 {
2115         int ret;
2116
2117         ret = i2c_add_driver(&unittest_i2c_dev_driver);
2118         if (unittest(ret == 0,
2119                         "could not register unittest i2c device driver\n"))
2120                 return ret;
2121
2122         ret = platform_driver_register(&unittest_i2c_bus_driver);
2123         if (unittest(ret == 0,
2124                         "could not register unittest i2c bus driver\n"))
2125                 return ret;
2126
2127 #if IS_BUILTIN(CONFIG_I2C_MUX)
2128         ret = i2c_add_driver(&unittest_i2c_mux_driver);
2129         if (unittest(ret == 0,
2130                         "could not register unittest i2c mux driver\n"))
2131                 return ret;
2132 #endif
2133
2134         return 0;
2135 }
2136
2137 static void of_unittest_overlay_i2c_cleanup(void)
2138 {
2139 #if IS_BUILTIN(CONFIG_I2C_MUX)
2140         i2c_del_driver(&unittest_i2c_mux_driver);
2141 #endif
2142         platform_driver_unregister(&unittest_i2c_bus_driver);
2143         i2c_del_driver(&unittest_i2c_dev_driver);
2144 }
2145
2146 static void __init of_unittest_overlay_i2c_12(void)
2147 {
2148         /* device should enable */
2149         if (of_unittest_apply_overlay_check(12, 12, 0, 1, I2C_OVERLAY))
2150                 return;
2151
2152         unittest(1, "overlay test %d passed\n", 12);
2153 }
2154
2155 /* test deactivation of device */
2156 static void __init of_unittest_overlay_i2c_13(void)
2157 {
2158         /* device should disable */
2159         if (of_unittest_apply_overlay_check(13, 13, 1, 0, I2C_OVERLAY))
2160                 return;
2161
2162         unittest(1, "overlay test %d passed\n", 13);
2163 }
2164
2165 /* just check for i2c mux existence */
2166 static void of_unittest_overlay_i2c_14(void)
2167 {
2168 }
2169
2170 static void __init of_unittest_overlay_i2c_15(void)
2171 {
2172         /* device should enable */
2173         if (of_unittest_apply_overlay_check(15, 15, 0, 1, I2C_OVERLAY))
2174                 return;
2175
2176         unittest(1, "overlay test %d passed\n", 15);
2177 }
2178
2179 #else
2180
2181 static inline void of_unittest_overlay_i2c_14(void) { }
2182 static inline void of_unittest_overlay_i2c_15(void) { }
2183
2184 #endif
2185
2186 static void __init of_unittest_overlay(void)
2187 {
2188         struct device_node *bus_np = NULL;
2189
2190         if (platform_driver_register(&unittest_driver)) {
2191                 unittest(0, "could not register unittest driver\n");
2192                 goto out;
2193         }
2194
2195         bus_np = of_find_node_by_path(bus_path);
2196         if (bus_np == NULL) {
2197                 unittest(0, "could not find bus_path \"%s\"\n", bus_path);
2198                 goto out;
2199         }
2200
2201         if (of_platform_default_populate(bus_np, NULL, NULL)) {
2202                 unittest(0, "could not populate bus @ \"%s\"\n", bus_path);
2203                 goto out;
2204         }
2205
2206         if (!of_unittest_device_exists(100, PDEV_OVERLAY)) {
2207                 unittest(0, "could not find unittest0 @ \"%s\"\n",
2208                                 unittest_path(100, PDEV_OVERLAY));
2209                 goto out;
2210         }
2211
2212         if (of_unittest_device_exists(101, PDEV_OVERLAY)) {
2213                 unittest(0, "unittest1 @ \"%s\" should not exist\n",
2214                                 unittest_path(101, PDEV_OVERLAY));
2215                 goto out;
2216         }
2217
2218         unittest(1, "basic infrastructure of overlays passed");
2219
2220         /* tests in sequence */
2221         of_unittest_overlay_0();
2222         of_unittest_overlay_1();
2223         of_unittest_overlay_2();
2224         of_unittest_overlay_3();
2225         of_unittest_overlay_4();
2226         of_unittest_overlay_5();
2227         of_unittest_overlay_6();
2228         of_unittest_overlay_8();
2229
2230         of_unittest_overlay_10();
2231         of_unittest_overlay_11();
2232
2233 #if IS_BUILTIN(CONFIG_I2C)
2234         if (unittest(of_unittest_overlay_i2c_init() == 0, "i2c init failed\n"))
2235                 goto out;
2236
2237         of_unittest_overlay_i2c_12();
2238         of_unittest_overlay_i2c_13();
2239         of_unittest_overlay_i2c_14();
2240         of_unittest_overlay_i2c_15();
2241
2242         of_unittest_overlay_i2c_cleanup();
2243 #endif
2244
2245         of_unittest_destroy_tracked_overlays();
2246
2247 out:
2248         of_node_put(bus_np);
2249 }
2250
2251 #else
2252 static inline void __init of_unittest_overlay(void) { }
2253 #endif
2254
2255 #ifdef CONFIG_OF_OVERLAY
2256
2257 /*
2258  * __dtb_ot_begin[] and __dtb_ot_end[] are created by cmd_dt_S_dtb
2259  * in scripts/Makefile.lib
2260  */
2261
2262 #define OVERLAY_INFO_EXTERN(name) \
2263         extern uint8_t __dtb_##name##_begin[]; \
2264         extern uint8_t __dtb_##name##_end[]
2265
2266 #define OVERLAY_INFO(overlay_name, expected)             \
2267 {       .dtb_begin       = __dtb_##overlay_name##_begin, \
2268         .dtb_end         = __dtb_##overlay_name##_end,   \
2269         .expected_result = expected,                     \
2270         .name            = #overlay_name,                \
2271 }
2272
2273 struct overlay_info {
2274         uint8_t         *dtb_begin;
2275         uint8_t         *dtb_end;
2276         int             expected_result;
2277         int             overlay_id;
2278         char            *name;
2279 };
2280
2281 OVERLAY_INFO_EXTERN(overlay_base);
2282 OVERLAY_INFO_EXTERN(overlay);
2283 OVERLAY_INFO_EXTERN(overlay_0);
2284 OVERLAY_INFO_EXTERN(overlay_1);
2285 OVERLAY_INFO_EXTERN(overlay_2);
2286 OVERLAY_INFO_EXTERN(overlay_3);
2287 OVERLAY_INFO_EXTERN(overlay_4);
2288 OVERLAY_INFO_EXTERN(overlay_5);
2289 OVERLAY_INFO_EXTERN(overlay_6);
2290 OVERLAY_INFO_EXTERN(overlay_7);
2291 OVERLAY_INFO_EXTERN(overlay_8);
2292 OVERLAY_INFO_EXTERN(overlay_9);
2293 OVERLAY_INFO_EXTERN(overlay_10);
2294 OVERLAY_INFO_EXTERN(overlay_11);
2295 OVERLAY_INFO_EXTERN(overlay_12);
2296 OVERLAY_INFO_EXTERN(overlay_13);
2297 OVERLAY_INFO_EXTERN(overlay_15);
2298 OVERLAY_INFO_EXTERN(overlay_bad_add_dup_node);
2299 OVERLAY_INFO_EXTERN(overlay_bad_add_dup_prop);
2300 OVERLAY_INFO_EXTERN(overlay_bad_phandle);
2301 OVERLAY_INFO_EXTERN(overlay_bad_symbol);
2302
2303 /* entries found by name */
2304 static struct overlay_info overlays[] = {
2305         OVERLAY_INFO(overlay_base, -9999),
2306         OVERLAY_INFO(overlay, 0),
2307         OVERLAY_INFO(overlay_0, 0),
2308         OVERLAY_INFO(overlay_1, 0),
2309         OVERLAY_INFO(overlay_2, 0),
2310         OVERLAY_INFO(overlay_3, 0),
2311         OVERLAY_INFO(overlay_4, 0),
2312         OVERLAY_INFO(overlay_5, 0),
2313         OVERLAY_INFO(overlay_6, 0),
2314         OVERLAY_INFO(overlay_7, 0),
2315         OVERLAY_INFO(overlay_8, 0),
2316         OVERLAY_INFO(overlay_9, 0),
2317         OVERLAY_INFO(overlay_10, 0),
2318         OVERLAY_INFO(overlay_11, 0),
2319         OVERLAY_INFO(overlay_12, 0),
2320         OVERLAY_INFO(overlay_13, 0),
2321         OVERLAY_INFO(overlay_15, 0),
2322         OVERLAY_INFO(overlay_bad_add_dup_node, -EINVAL),
2323         OVERLAY_INFO(overlay_bad_add_dup_prop, -EINVAL),
2324         OVERLAY_INFO(overlay_bad_phandle, -EINVAL),
2325         OVERLAY_INFO(overlay_bad_symbol, -EINVAL),
2326         /* end marker */
2327         {.dtb_begin = NULL, .dtb_end = NULL, .expected_result = 0, .name = NULL}
2328 };
2329
2330 static struct device_node *overlay_base_root;
2331
2332 static void * __init dt_alloc_memory(u64 size, u64 align)
2333 {
2334         void *ptr = memblock_alloc(size, align);
2335
2336         if (!ptr)
2337                 panic("%s: Failed to allocate %llu bytes align=0x%llx\n",
2338                       __func__, size, align);
2339
2340         return ptr;
2341 }
2342
2343 /*
2344  * Create base device tree for the overlay unittest.
2345  *
2346  * This is called from very early boot code.
2347  *
2348  * Do as much as possible the same way as done in __unflatten_device_tree
2349  * and other early boot steps for the normal FDT so that the overlay base
2350  * unflattened tree will have the same characteristics as the real tree
2351  * (such as having memory allocated by the early allocator).  The goal
2352  * is to test "the real thing" as much as possible, and test "test setup
2353  * code" as little as possible.
2354  *
2355  * Have to stop before resolving phandles, because that uses kmalloc.
2356  */
2357 void __init unittest_unflatten_overlay_base(void)
2358 {
2359         struct overlay_info *info;
2360         u32 data_size;
2361         void *new_fdt;
2362         u32 size;
2363         int found = 0;
2364         const char *overlay_name = "overlay_base";
2365
2366         for (info = overlays; info && info->name; info++) {
2367                 if (!strcmp(overlay_name, info->name)) {
2368                         found = 1;
2369                         break;
2370                 }
2371         }
2372         if (!found) {
2373                 pr_err("no overlay data for %s\n", overlay_name);
2374                 return;
2375         }
2376
2377         info = &overlays[0];
2378
2379         if (info->expected_result != -9999) {
2380                 pr_err("No dtb 'overlay_base' to attach\n");
2381                 return;
2382         }
2383
2384         data_size = info->dtb_end - info->dtb_begin;
2385         if (!data_size) {
2386                 pr_err("No dtb 'overlay_base' to attach\n");
2387                 return;
2388         }
2389
2390         size = fdt_totalsize(info->dtb_begin);
2391         if (size != data_size) {
2392                 pr_err("dtb 'overlay_base' header totalsize != actual size");
2393                 return;
2394         }
2395
2396         new_fdt = dt_alloc_memory(size, roundup_pow_of_two(FDT_V17_SIZE));
2397         if (!new_fdt) {
2398                 pr_err("alloc for dtb 'overlay_base' failed");
2399                 return;
2400         }
2401
2402         memcpy(new_fdt, info->dtb_begin, size);
2403
2404         __unflatten_device_tree(new_fdt, NULL, &overlay_base_root,
2405                                 dt_alloc_memory, true);
2406 }
2407
2408 /*
2409  * The purpose of of_unittest_overlay_data_add is to add an
2410  * overlay in the normal fashion.  This is a test of the whole
2411  * picture, instead of testing individual elements.
2412  *
2413  * A secondary purpose is to be able to verify that the contents of
2414  * /proc/device-tree/ contains the updated structure and values from
2415  * the overlay.  That must be verified separately in user space.
2416  *
2417  * Return 0 on unexpected error.
2418  */
2419 static int __init overlay_data_apply(const char *overlay_name, int *overlay_id)
2420 {
2421         struct overlay_info *info;
2422         int found = 0;
2423         int ret;
2424         u32 size;
2425
2426         for (info = overlays; info && info->name; info++) {
2427                 if (!strcmp(overlay_name, info->name)) {
2428                         found = 1;
2429                         break;
2430                 }
2431         }
2432         if (!found) {
2433                 pr_err("no overlay data for %s\n", overlay_name);
2434                 return 0;
2435         }
2436
2437         size = info->dtb_end - info->dtb_begin;
2438         if (!size)
2439                 pr_err("no overlay data for %s\n", overlay_name);
2440
2441         ret = of_overlay_fdt_apply(info->dtb_begin, size, &info->overlay_id);
2442         if (overlay_id)
2443                 *overlay_id = info->overlay_id;
2444         if (ret < 0)
2445                 goto out;
2446
2447         pr_debug("%s applied\n", overlay_name);
2448
2449 out:
2450         if (ret != info->expected_result)
2451                 pr_err("of_overlay_fdt_apply() expected %d, ret=%d, %s\n",
2452                        info->expected_result, ret, overlay_name);
2453
2454         return (ret == info->expected_result);
2455 }
2456
2457 /*
2458  * The purpose of of_unittest_overlay_high_level is to add an overlay
2459  * in the normal fashion.  This is a test of the whole picture,
2460  * instead of individual elements.
2461  *
2462  * The first part of the function is _not_ normal overlay usage; it is
2463  * finishing splicing the base overlay device tree into the live tree.
2464  */
2465 static __init void of_unittest_overlay_high_level(void)
2466 {
2467         struct device_node *last_sibling;
2468         struct device_node *np;
2469         struct device_node *of_symbols;
2470         struct device_node *overlay_base_symbols;
2471         struct device_node **pprev;
2472         struct property *prop;
2473
2474         if (!overlay_base_root) {
2475                 unittest(0, "overlay_base_root not initialized\n");
2476                 return;
2477         }
2478
2479         /*
2480          * Could not fixup phandles in unittest_unflatten_overlay_base()
2481          * because kmalloc() was not yet available.
2482          */
2483         of_overlay_mutex_lock();
2484         of_resolve_phandles(overlay_base_root);
2485         of_overlay_mutex_unlock();
2486
2487
2488         /*
2489          * do not allow overlay_base to duplicate any node already in
2490          * tree, this greatly simplifies the code
2491          */
2492
2493         /*
2494          * remove overlay_base_root node "__local_fixups", after
2495          * being used by of_resolve_phandles()
2496          */
2497         pprev = &overlay_base_root->child;
2498         for (np = overlay_base_root->child; np; np = np->sibling) {
2499                 if (of_node_name_eq(np, "__local_fixups__")) {
2500                         *pprev = np->sibling;
2501                         break;
2502                 }
2503                 pprev = &np->sibling;
2504         }
2505
2506         /* remove overlay_base_root node "__symbols__" if in live tree */
2507         of_symbols = of_get_child_by_name(of_root, "__symbols__");
2508         if (of_symbols) {
2509                 /* will have to graft properties from node into live tree */
2510                 pprev = &overlay_base_root->child;
2511                 for (np = overlay_base_root->child; np; np = np->sibling) {
2512                         if (of_node_name_eq(np, "__symbols__")) {
2513                                 overlay_base_symbols = np;
2514                                 *pprev = np->sibling;
2515                                 break;
2516                         }
2517                         pprev = &np->sibling;
2518                 }
2519         }
2520
2521         for_each_child_of_node(overlay_base_root, np) {
2522                 struct device_node *base_child;
2523                 for_each_child_of_node(of_root, base_child) {
2524                         if (!strcmp(np->full_name, base_child->full_name)) {
2525                                 unittest(0, "illegal node name in overlay_base %pOFn",
2526                                          np);
2527                                 return;
2528                         }
2529                 }
2530         }
2531
2532         /*
2533          * overlay 'overlay_base' is not allowed to have root
2534          * properties, so only need to splice nodes into main device tree.
2535          *
2536          * root node of *overlay_base_root will not be freed, it is lost
2537          * memory.
2538          */
2539
2540         for (np = overlay_base_root->child; np; np = np->sibling)
2541                 np->parent = of_root;
2542
2543         mutex_lock(&of_mutex);
2544
2545         for (last_sibling = np = of_root->child; np; np = np->sibling)
2546                 last_sibling = np;
2547
2548         if (last_sibling)
2549                 last_sibling->sibling = overlay_base_root->child;
2550         else
2551                 of_root->child = overlay_base_root->child;
2552
2553         for_each_of_allnodes_from(overlay_base_root, np)
2554                 __of_attach_node_sysfs(np);
2555
2556         if (of_symbols) {
2557                 struct property *new_prop;
2558                 for_each_property_of_node(overlay_base_symbols, prop) {
2559
2560                         new_prop = __of_prop_dup(prop, GFP_KERNEL);
2561                         if (!new_prop) {
2562                                 unittest(0, "__of_prop_dup() of '%s' from overlay_base node __symbols__",
2563                                          prop->name);
2564                                 goto err_unlock;
2565                         }
2566                         if (__of_add_property(of_symbols, new_prop)) {
2567                                 /* "name" auto-generated by unflatten */
2568                                 if (!strcmp(new_prop->name, "name"))
2569                                         continue;
2570                                 unittest(0, "duplicate property '%s' in overlay_base node __symbols__",
2571                                          prop->name);
2572                                 goto err_unlock;
2573                         }
2574                         if (__of_add_property_sysfs(of_symbols, new_prop)) {
2575                                 unittest(0, "unable to add property '%s' in overlay_base node __symbols__ to sysfs",
2576                                          prop->name);
2577                                 goto err_unlock;
2578                         }
2579                 }
2580         }
2581
2582         mutex_unlock(&of_mutex);
2583
2584
2585         /* now do the normal overlay usage test */
2586
2587         unittest(overlay_data_apply("overlay", NULL),
2588                  "Adding overlay 'overlay' failed\n");
2589
2590         unittest(overlay_data_apply("overlay_bad_add_dup_node", NULL),
2591                  "Adding overlay 'overlay_bad_add_dup_node' failed\n");
2592
2593         unittest(overlay_data_apply("overlay_bad_add_dup_prop", NULL),
2594                  "Adding overlay 'overlay_bad_add_dup_prop' failed\n");
2595
2596         unittest(overlay_data_apply("overlay_bad_phandle", NULL),
2597                  "Adding overlay 'overlay_bad_phandle' failed\n");
2598
2599         unittest(overlay_data_apply("overlay_bad_symbol", NULL),
2600                  "Adding overlay 'overlay_bad_symbol' failed\n");
2601
2602         return;
2603
2604 err_unlock:
2605         mutex_unlock(&of_mutex);
2606 }
2607
2608 #else
2609
2610 static inline __init void of_unittest_overlay_high_level(void) {}
2611
2612 #endif
2613
2614 static int __init of_unittest(void)
2615 {
2616         struct device_node *np;
2617         int res;
2618
2619         /* adding data for unittest */
2620
2621         if (IS_ENABLED(CONFIG_UML))
2622                 unittest_unflatten_overlay_base();
2623
2624         res = unittest_data_add();
2625         if (res)
2626                 return res;
2627         if (!of_aliases)
2628                 of_aliases = of_find_node_by_path("/aliases");
2629
2630         np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
2631         if (!np) {
2632                 pr_info("No testcase data in device tree; not running tests\n");
2633                 return 0;
2634         }
2635         of_node_put(np);
2636
2637         pr_info("start of unittest - you will see error messages\n");
2638         of_unittest_check_tree_linkage();
2639         of_unittest_check_phandles();
2640         of_unittest_find_node_by_name();
2641         of_unittest_dynamic();
2642         of_unittest_parse_phandle_with_args();
2643         of_unittest_parse_phandle_with_args_map();
2644         of_unittest_printf();
2645         of_unittest_property_string();
2646         of_unittest_property_copy();
2647         of_unittest_changeset();
2648         of_unittest_parse_interrupts();
2649         of_unittest_parse_interrupts_extended();
2650         of_unittest_parse_dma_ranges();
2651         of_unittest_pci_dma_ranges();
2652         of_unittest_match_node();
2653         of_unittest_platform_populate();
2654         of_unittest_overlay();
2655
2656         /* Double check linkage after removing testcase data */
2657         of_unittest_check_tree_linkage();
2658
2659         of_unittest_overlay_high_level();
2660
2661         pr_info("end of unittest - %i passed, %i failed\n",
2662                 unittest_results.passed, unittest_results.failed);
2663
2664         return 0;
2665 }
2666 late_initcall(of_unittest);