1
2
3
4
5#define pr_fmt(fmt) "### dt-test ### " fmt
6
7#include <linux/clk.h>
8#include <linux/err.h>
9#include <linux/errno.h>
10#include <linux/hashtable.h>
11#include <linux/module.h>
12#include <linux/of.h>
13#include <linux/of_fdt.h>
14#include <linux/of_irq.h>
15#include <linux/of_platform.h>
16#include <linux/list.h>
17#include <linux/mutex.h>
18#include <linux/slab.h>
19#include <linux/device.h>
20#include <linux/platform_device.h>
21#include <linux/of_platform.h>
22
23#include <linux/i2c.h>
24#include <linux/i2c-mux.h>
25
26#include <linux/bitops.h>
27
28#include "of_private.h"
29
30static struct unittest_results {
31 int passed;
32 int failed;
33} unittest_results;
34
35#define unittest(result, fmt, ...) ({ \
36 bool failed = !(result); \
37 if (failed) { \
38 unittest_results.failed++; \
39 pr_err("FAIL %s():%i " fmt, __func__, __LINE__, ##__VA_ARGS__); \
40 } else { \
41 unittest_results.passed++; \
42 pr_debug("pass %s():%i\n", __func__, __LINE__); \
43 } \
44 failed; \
45})
46
47static void __init of_unittest_find_node_by_name(void)
48{
49 struct device_node *np;
50 const char *options;
51
52 np = of_find_node_by_path("/testcase-data");
53 unittest(np && !strcmp("/testcase-data", np->full_name),
54 "find /testcase-data failed\n");
55 of_node_put(np);
56
57
58 np = of_find_node_by_path("/testcase-data/");
59 unittest(!np, "trailing '/' on /testcase-data/ should fail\n");
60
61 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
62 unittest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", np->full_name),
63 "find /testcase-data/phandle-tests/consumer-a failed\n");
64 of_node_put(np);
65
66 np = of_find_node_by_path("testcase-alias");
67 unittest(np && !strcmp("/testcase-data", np->full_name),
68 "find testcase-alias failed\n");
69 of_node_put(np);
70
71
72 np = of_find_node_by_path("testcase-alias/");
73 unittest(!np, "trailing '/' on testcase-alias/ should fail\n");
74
75 np = of_find_node_by_path("testcase-alias/phandle-tests/consumer-a");
76 unittest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", np->full_name),
77 "find testcase-alias/phandle-tests/consumer-a failed\n");
78 of_node_put(np);
79
80 np = of_find_node_by_path("/testcase-data/missing-path");
81 unittest(!np, "non-existent path returned node %s\n", np->full_name);
82 of_node_put(np);
83
84 np = of_find_node_by_path("missing-alias");
85 unittest(!np, "non-existent alias returned node %s\n", np->full_name);
86 of_node_put(np);
87
88 np = of_find_node_by_path("testcase-alias/missing-path");
89 unittest(!np, "non-existent alias with relative path returned node %s\n", np->full_name);
90 of_node_put(np);
91
92 np = of_find_node_opts_by_path("/testcase-data:testoption", &options);
93 unittest(np && !strcmp("testoption", options),
94 "option path test failed\n");
95 of_node_put(np);
96
97 np = of_find_node_opts_by_path("/testcase-data:test/option", &options);
98 unittest(np && !strcmp("test/option", options),
99 "option path test, subcase #1 failed\n");
100 of_node_put(np);
101
102 np = of_find_node_opts_by_path("/testcase-data/testcase-device1:test/option", &options);
103 unittest(np && !strcmp("test/option", options),
104 "option path test, subcase #2 failed\n");
105 of_node_put(np);
106
107 np = of_find_node_opts_by_path("/testcase-data:testoption", NULL);
108 unittest(np, "NULL option path test failed\n");
109 of_node_put(np);
110
111 np = of_find_node_opts_by_path("testcase-alias:testaliasoption",
112 &options);
113 unittest(np && !strcmp("testaliasoption", options),
114 "option alias path test failed\n");
115 of_node_put(np);
116
117 np = of_find_node_opts_by_path("testcase-alias:test/alias/option",
118 &options);
119 unittest(np && !strcmp("test/alias/option", options),
120 "option alias path test, subcase #1 failed\n");
121 of_node_put(np);
122
123 np = of_find_node_opts_by_path("testcase-alias:testaliasoption", NULL);
124 unittest(np, "NULL option alias path test failed\n");
125 of_node_put(np);
126
127 options = "testoption";
128 np = of_find_node_opts_by_path("testcase-alias", &options);
129 unittest(np && !options, "option clearing test failed\n");
130 of_node_put(np);
131
132 options = "testoption";
133 np = of_find_node_opts_by_path("/", &options);
134 unittest(np && !options, "option clearing root node test failed\n");
135 of_node_put(np);
136}
137
138static void __init of_unittest_dynamic(void)
139{
140 struct device_node *np;
141 struct property *prop;
142
143 np = of_find_node_by_path("/testcase-data");
144 if (!np) {
145 pr_err("missing testcase data\n");
146 return;
147 }
148
149
150 prop = kzalloc(sizeof(*prop) * 4, GFP_KERNEL);
151 if (!prop) {
152 unittest(0, "kzalloc() failed\n");
153 return;
154 }
155
156
157 prop->name = "new-property";
158 prop->value = "new-property-data";
159 prop->length = strlen(prop->value);
160 unittest(of_add_property(np, prop) == 0, "Adding a new property failed\n");
161
162
163 prop++;
164 prop->name = "new-property";
165 prop->value = "new-property-data-should-fail";
166 prop->length = strlen(prop->value);
167 unittest(of_add_property(np, prop) != 0,
168 "Adding an existing property should have failed\n");
169
170
171 prop->value = "modify-property-data-should-pass";
172 prop->length = strlen(prop->value);
173 unittest(of_update_property(np, prop) == 0,
174 "Updating an existing property should have passed\n");
175
176
177 prop++;
178 prop->name = "modify-property";
179 prop->value = "modify-missing-property-data-should-pass";
180 prop->length = strlen(prop->value);
181 unittest(of_update_property(np, prop) == 0,
182 "Updating a missing property should have passed\n");
183
184
185 unittest(of_remove_property(np, prop) == 0,
186 "Removing a property should have passed\n");
187
188
189 prop++;
190 prop->name = "large-property-PAGE_SIZEx8";
191 prop->length = PAGE_SIZE * 8;
192 prop->value = kzalloc(prop->length, GFP_KERNEL);
193 unittest(prop->value != NULL, "Unable to allocate large buffer\n");
194 if (prop->value)
195 unittest(of_add_property(np, prop) == 0,
196 "Adding a large property should have passed\n");
197}
198
199static int __init of_unittest_check_node_linkage(struct device_node *np)
200{
201 struct device_node *child;
202 int count = 0, rc;
203
204 for_each_child_of_node(np, child) {
205 if (child->parent != np) {
206 pr_err("Child node %s links to wrong parent %s\n",
207 child->name, np->name);
208 rc = -EINVAL;
209 goto put_child;
210 }
211
212 rc = of_unittest_check_node_linkage(child);
213 if (rc < 0)
214 goto put_child;
215 count += rc;
216 }
217
218 return count + 1;
219put_child:
220 of_node_put(child);
221 return rc;
222}
223
224static void __init of_unittest_check_tree_linkage(void)
225{
226 struct device_node *np;
227 int allnode_count = 0, child_count;
228
229 if (!of_root)
230 return;
231
232 for_each_of_allnodes(np)
233 allnode_count++;
234 child_count = of_unittest_check_node_linkage(of_root);
235
236 unittest(child_count > 0, "Device node data structure is corrupted\n");
237 unittest(child_count == allnode_count,
238 "allnodes list size (%i) doesn't match sibling lists size (%i)\n",
239 allnode_count, child_count);
240 pr_debug("allnodes list size (%i); sibling lists size (%i)\n", allnode_count, child_count);
241}
242
243struct node_hash {
244 struct hlist_node node;
245 struct device_node *np;
246};
247
248static DEFINE_HASHTABLE(phandle_ht, 8);
249static void __init of_unittest_check_phandles(void)
250{
251 struct device_node *np;
252 struct node_hash *nh;
253 struct hlist_node *tmp;
254 int i, dup_count = 0, phandle_count = 0;
255
256 for_each_of_allnodes(np) {
257 if (!np->phandle)
258 continue;
259
260 hash_for_each_possible(phandle_ht, nh, node, np->phandle) {
261 if (nh->np->phandle == np->phandle) {
262 pr_info("Duplicate phandle! %i used by %s and %s\n",
263 np->phandle, nh->np->full_name, np->full_name);
264 dup_count++;
265 break;
266 }
267 }
268
269 nh = kzalloc(sizeof(*nh), GFP_KERNEL);
270 if (WARN_ON(!nh))
271 return;
272
273 nh->np = np;
274 hash_add(phandle_ht, &nh->node, np->phandle);
275 phandle_count++;
276 }
277 unittest(dup_count == 0, "Found %i duplicates in %i phandles\n",
278 dup_count, phandle_count);
279
280
281 hash_for_each_safe(phandle_ht, i, tmp, nh, node) {
282 hash_del(&nh->node);
283 kfree(nh);
284 }
285}
286
287static void __init of_unittest_parse_phandle_with_args(void)
288{
289 struct device_node *np;
290 struct of_phandle_args args;
291 int i, rc;
292
293 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
294 if (!np) {
295 pr_err("missing testcase data\n");
296 return;
297 }
298
299 rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
300 unittest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc);
301
302 for (i = 0; i < 8; i++) {
303 bool passed = true;
304
305 rc = of_parse_phandle_with_args(np, "phandle-list",
306 "#phandle-cells", i, &args);
307
308
309 switch (i) {
310 case 0:
311 passed &= !rc;
312 passed &= (args.args_count == 1);
313 passed &= (args.args[0] == (i + 1));
314 break;
315 case 1:
316 passed &= !rc;
317 passed &= (args.args_count == 2);
318 passed &= (args.args[0] == (i + 1));
319 passed &= (args.args[1] == 0);
320 break;
321 case 2:
322 passed &= (rc == -ENOENT);
323 break;
324 case 3:
325 passed &= !rc;
326 passed &= (args.args_count == 3);
327 passed &= (args.args[0] == (i + 1));
328 passed &= (args.args[1] == 4);
329 passed &= (args.args[2] == 3);
330 break;
331 case 4:
332 passed &= !rc;
333 passed &= (args.args_count == 2);
334 passed &= (args.args[0] == (i + 1));
335 passed &= (args.args[1] == 100);
336 break;
337 case 5:
338 passed &= !rc;
339 passed &= (args.args_count == 0);
340 break;
341 case 6:
342 passed &= !rc;
343 passed &= (args.args_count == 1);
344 passed &= (args.args[0] == (i + 1));
345 break;
346 case 7:
347 passed &= (rc == -ENOENT);
348 break;
349 default:
350 passed = false;
351 }
352
353 unittest(passed, "index %i - data error on node %s rc=%i\n",
354 i, args.np->full_name, rc);
355 }
356
357
358 rc = of_parse_phandle_with_args(np, "phandle-list-missing",
359 "#phandle-cells", 0, &args);
360 unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
361 rc = of_count_phandle_with_args(np, "phandle-list-missing",
362 "#phandle-cells");
363 unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
364
365
366 rc = of_parse_phandle_with_args(np, "phandle-list",
367 "#phandle-cells-missing", 0, &args);
368 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
369 rc = of_count_phandle_with_args(np, "phandle-list",
370 "#phandle-cells-missing");
371 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
372
373
374 rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle",
375 "#phandle-cells", 0, &args);
376 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
377 rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle",
378 "#phandle-cells");
379 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
380
381
382 rc = of_parse_phandle_with_args(np, "phandle-list-bad-args",
383 "#phandle-cells", 1, &args);
384 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
385 rc = of_count_phandle_with_args(np, "phandle-list-bad-args",
386 "#phandle-cells");
387 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
388}
389
390static void __init of_unittest_property_string(void)
391{
392 const char *strings[4];
393 struct device_node *np;
394 int rc;
395
396 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
397 if (!np) {
398 pr_err("No testcase data in device tree\n");
399 return;
400 }
401
402 rc = of_property_match_string(np, "phandle-list-names", "first");
403 unittest(rc == 0, "first expected:0 got:%i\n", rc);
404 rc = of_property_match_string(np, "phandle-list-names", "second");
405 unittest(rc == 1, "second expected:1 got:%i\n", rc);
406 rc = of_property_match_string(np, "phandle-list-names", "third");
407 unittest(rc == 2, "third expected:2 got:%i\n", rc);
408 rc = of_property_match_string(np, "phandle-list-names", "fourth");
409 unittest(rc == -ENODATA, "unmatched string; rc=%i\n", rc);
410 rc = of_property_match_string(np, "missing-property", "blah");
411 unittest(rc == -EINVAL, "missing property; rc=%i\n", rc);
412 rc = of_property_match_string(np, "empty-property", "blah");
413 unittest(rc == -ENODATA, "empty property; rc=%i\n", rc);
414 rc = of_property_match_string(np, "unterminated-string", "blah");
415 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
416
417
418 rc = of_property_count_strings(np, "string-property");
419 unittest(rc == 1, "Incorrect string count; rc=%i\n", rc);
420 rc = of_property_count_strings(np, "phandle-list-names");
421 unittest(rc == 3, "Incorrect string count; rc=%i\n", rc);
422 rc = of_property_count_strings(np, "unterminated-string");
423 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
424 rc = of_property_count_strings(np, "unterminated-string-list");
425 unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
426
427
428 rc = of_property_read_string_index(np, "string-property", 0, strings);
429 unittest(rc == 0 && !strcmp(strings[0], "foobar"), "of_property_read_string_index() failure; rc=%i\n", rc);
430 strings[0] = NULL;
431 rc = of_property_read_string_index(np, "string-property", 1, strings);
432 unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
433 rc = of_property_read_string_index(np, "phandle-list-names", 0, strings);
434 unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
435 rc = of_property_read_string_index(np, "phandle-list-names", 1, strings);
436 unittest(rc == 0 && !strcmp(strings[0], "second"), "of_property_read_string_index() failure; rc=%i\n", rc);
437 rc = of_property_read_string_index(np, "phandle-list-names", 2, strings);
438 unittest(rc == 0 && !strcmp(strings[0], "third"), "of_property_read_string_index() failure; rc=%i\n", rc);
439 strings[0] = NULL;
440 rc = of_property_read_string_index(np, "phandle-list-names", 3, strings);
441 unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
442 strings[0] = NULL;
443 rc = of_property_read_string_index(np, "unterminated-string", 0, strings);
444 unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
445 rc = of_property_read_string_index(np, "unterminated-string-list", 0, strings);
446 unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
447 strings[0] = NULL;
448 rc = of_property_read_string_index(np, "unterminated-string-list", 2, strings);
449 unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
450 strings[1] = NULL;
451
452
453 rc = of_property_read_string_array(np, "string-property", strings, 4);
454 unittest(rc == 1, "Incorrect string count; rc=%i\n", rc);
455 rc = of_property_read_string_array(np, "phandle-list-names", strings, 4);
456 unittest(rc == 3, "Incorrect string count; rc=%i\n", rc);
457 rc = of_property_read_string_array(np, "unterminated-string", strings, 4);
458 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
459
460 rc = of_property_read_string_array(np, "unterminated-string-list", strings, 4);
461 unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
462
463 strings[2] = NULL;
464 rc = of_property_read_string_array(np, "unterminated-string-list", strings, 2);
465 unittest(rc == 2 && strings[2] == NULL, "of_property_read_string_array() failure; rc=%i\n", rc);
466 strings[1] = NULL;
467 rc = of_property_read_string_array(np, "phandle-list-names", strings, 1);
468 unittest(rc == 1 && strings[1] == NULL, "Overwrote end of string array; rc=%i, str='%s'\n", rc, strings[1]);
469}
470
471#define propcmp(p1, p2) (((p1)->length == (p2)->length) && \
472 (p1)->value && (p2)->value && \
473 !memcmp((p1)->value, (p2)->value, (p1)->length) && \
474 !strcmp((p1)->name, (p2)->name))
475static void __init of_unittest_property_copy(void)
476{
477#ifdef CONFIG_OF_DYNAMIC
478 struct property p1 = { .name = "p1", .length = 0, .value = "" };
479 struct property p2 = { .name = "p2", .length = 5, .value = "abcd" };
480 struct property *new;
481
482 new = __of_prop_dup(&p1, GFP_KERNEL);
483 unittest(new && propcmp(&p1, new), "empty property didn't copy correctly\n");
484 kfree(new->value);
485 kfree(new->name);
486 kfree(new);
487
488 new = __of_prop_dup(&p2, GFP_KERNEL);
489 unittest(new && propcmp(&p2, new), "non-empty property didn't copy correctly\n");
490 kfree(new->value);
491 kfree(new->name);
492 kfree(new);
493#endif
494}
495
496static void __init of_unittest_changeset(void)
497{
498#ifdef CONFIG_OF_DYNAMIC
499 struct property *ppadd, padd = { .name = "prop-add", .length = 0, .value = "" };
500 struct property *ppupdate, pupdate = { .name = "prop-update", .length = 5, .value = "abcd" };
501 struct property *ppremove;
502 struct device_node *n1, *n2, *n21, *nremove, *parent, *np;
503 struct of_changeset chgset;
504
505 n1 = __of_node_dup(NULL, "/testcase-data/changeset/n1");
506 unittest(n1, "testcase setup failure\n");
507 n2 = __of_node_dup(NULL, "/testcase-data/changeset/n2");
508 unittest(n2, "testcase setup failure\n");
509 n21 = __of_node_dup(NULL, "%s/%s", "/testcase-data/changeset/n2", "n21");
510 unittest(n21, "testcase setup failure %p\n", n21);
511 nremove = of_find_node_by_path("/testcase-data/changeset/node-remove");
512 unittest(nremove, "testcase setup failure\n");
513 ppadd = __of_prop_dup(&padd, GFP_KERNEL);
514 unittest(ppadd, "testcase setup failure\n");
515 ppupdate = __of_prop_dup(&pupdate, GFP_KERNEL);
516 unittest(ppupdate, "testcase setup failure\n");
517 parent = nremove->parent;
518 n1->parent = parent;
519 n2->parent = parent;
520 n21->parent = n2;
521 n2->child = n21;
522 ppremove = of_find_property(parent, "prop-remove", NULL);
523 unittest(ppremove, "failed to find removal prop");
524
525 of_changeset_init(&chgset);
526 unittest(!of_changeset_attach_node(&chgset, n1), "fail attach n1\n");
527 unittest(!of_changeset_attach_node(&chgset, n2), "fail attach n2\n");
528 unittest(!of_changeset_detach_node(&chgset, nremove), "fail remove node\n");
529 unittest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n");
530 unittest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop\n");
531 unittest(!of_changeset_update_property(&chgset, parent, ppupdate), "fail update prop\n");
532 unittest(!of_changeset_remove_property(&chgset, parent, ppremove), "fail remove prop\n");
533 unittest(!of_changeset_apply(&chgset), "apply failed\n");
534
535
536 unittest((np = of_find_node_by_path("/testcase-data/changeset/n2/n21")),
537 "'%s' not added\n", n21->full_name);
538 of_node_put(np);
539
540 unittest(!of_changeset_revert(&chgset), "revert failed\n");
541
542 of_changeset_destroy(&chgset);
543#endif
544}
545
546static void __init of_unittest_parse_interrupts(void)
547{
548 struct device_node *np;
549 struct of_phandle_args args;
550 int i, rc;
551
552 np = of_find_node_by_path("/testcase-data/interrupts/interrupts0");
553 if (!np) {
554 pr_err("missing testcase data\n");
555 return;
556 }
557
558 for (i = 0; i < 4; i++) {
559 bool passed = true;
560
561 args.args_count = 0;
562 rc = of_irq_parse_one(np, i, &args);
563
564 passed &= !rc;
565 passed &= (args.args_count == 1);
566 passed &= (args.args[0] == (i + 1));
567
568 unittest(passed, "index %i - data error on node %s rc=%i\n",
569 i, args.np->full_name, rc);
570 }
571 of_node_put(np);
572
573 np = of_find_node_by_path("/testcase-data/interrupts/interrupts1");
574 if (!np) {
575 pr_err("missing testcase data\n");
576 return;
577 }
578
579 for (i = 0; i < 4; i++) {
580 bool passed = true;
581
582 args.args_count = 0;
583 rc = of_irq_parse_one(np, i, &args);
584
585
586 switch (i) {
587 case 0:
588 passed &= !rc;
589 passed &= (args.args_count == 1);
590 passed &= (args.args[0] == 9);
591 break;
592 case 1:
593 passed &= !rc;
594 passed &= (args.args_count == 3);
595 passed &= (args.args[0] == 10);
596 passed &= (args.args[1] == 11);
597 passed &= (args.args[2] == 12);
598 break;
599 case 2:
600 passed &= !rc;
601 passed &= (args.args_count == 2);
602 passed &= (args.args[0] == 13);
603 passed &= (args.args[1] == 14);
604 break;
605 case 3:
606 passed &= !rc;
607 passed &= (args.args_count == 2);
608 passed &= (args.args[0] == 15);
609 passed &= (args.args[1] == 16);
610 break;
611 default:
612 passed = false;
613 }
614 unittest(passed, "index %i - data error on node %s rc=%i\n",
615 i, args.np->full_name, rc);
616 }
617 of_node_put(np);
618}
619
620static void __init of_unittest_parse_interrupts_extended(void)
621{
622 struct device_node *np;
623 struct of_phandle_args args;
624 int i, rc;
625
626 np = of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0");
627 if (!np) {
628 pr_err("missing testcase data\n");
629 return;
630 }
631
632 for (i = 0; i < 7; i++) {
633 bool passed = true;
634
635 rc = of_irq_parse_one(np, i, &args);
636
637
638 switch (i) {
639 case 0:
640 passed &= !rc;
641 passed &= (args.args_count == 1);
642 passed &= (args.args[0] == 1);
643 break;
644 case 1:
645 passed &= !rc;
646 passed &= (args.args_count == 3);
647 passed &= (args.args[0] == 2);
648 passed &= (args.args[1] == 3);
649 passed &= (args.args[2] == 4);
650 break;
651 case 2:
652 passed &= !rc;
653 passed &= (args.args_count == 2);
654 passed &= (args.args[0] == 5);
655 passed &= (args.args[1] == 6);
656 break;
657 case 3:
658 passed &= !rc;
659 passed &= (args.args_count == 1);
660 passed &= (args.args[0] == 9);
661 break;
662 case 4:
663 passed &= !rc;
664 passed &= (args.args_count == 3);
665 passed &= (args.args[0] == 10);
666 passed &= (args.args[1] == 11);
667 passed &= (args.args[2] == 12);
668 break;
669 case 5:
670 passed &= !rc;
671 passed &= (args.args_count == 2);
672 passed &= (args.args[0] == 13);
673 passed &= (args.args[1] == 14);
674 break;
675 case 6:
676 passed &= !rc;
677 passed &= (args.args_count == 1);
678 passed &= (args.args[0] == 15);
679 break;
680 default:
681 passed = false;
682 }
683
684 unittest(passed, "index %i - data error on node %s rc=%i\n",
685 i, args.np->full_name, rc);
686 }
687 of_node_put(np);
688}
689
690static const struct of_device_id match_node_table[] = {
691 { .data = "A", .name = "name0", },
692 { .data = "B", .type = "type1", },
693
694 { .data = "Ca", .name = "name2", .type = "type1", },
695 { .data = "Cb", .name = "name2", },
696 { .data = "Cc", .name = "name2", .type = "type2", },
697
698 { .data = "E", .compatible = "compat3" },
699 { .data = "G", .compatible = "compat2", },
700 { .data = "H", .compatible = "compat2", .name = "name5", },
701 { .data = "I", .compatible = "compat2", .type = "type1", },
702 { .data = "J", .compatible = "compat2", .type = "type1", .name = "name8", },
703 { .data = "K", .compatible = "compat2", .name = "name9", },
704 {}
705};
706
707static struct {
708 const char *path;
709 const char *data;
710} match_node_tests[] = {
711 { .path = "/testcase-data/match-node/name0", .data = "A", },
712 { .path = "/testcase-data/match-node/name1", .data = "B", },
713 { .path = "/testcase-data/match-node/a/name2", .data = "Ca", },
714 { .path = "/testcase-data/match-node/b/name2", .data = "Cb", },
715 { .path = "/testcase-data/match-node/c/name2", .data = "Cc", },
716 { .path = "/testcase-data/match-node/name3", .data = "E", },
717 { .path = "/testcase-data/match-node/name4", .data = "G", },
718 { .path = "/testcase-data/match-node/name5", .data = "H", },
719 { .path = "/testcase-data/match-node/name6", .data = "G", },
720 { .path = "/testcase-data/match-node/name7", .data = "I", },
721 { .path = "/testcase-data/match-node/name8", .data = "J", },
722 { .path = "/testcase-data/match-node/name9", .data = "K", },
723};
724
725static void __init of_unittest_match_node(void)
726{
727 struct device_node *np;
728 const struct of_device_id *match;
729 int i;
730
731 for (i = 0; i < ARRAY_SIZE(match_node_tests); i++) {
732 np = of_find_node_by_path(match_node_tests[i].path);
733 if (!np) {
734 unittest(0, "missing testcase node %s\n",
735 match_node_tests[i].path);
736 continue;
737 }
738
739 match = of_match_node(match_node_table, np);
740 if (!match) {
741 unittest(0, "%s didn't match anything\n",
742 match_node_tests[i].path);
743 continue;
744 }
745
746 if (strcmp(match->data, match_node_tests[i].data) != 0) {
747 unittest(0, "%s got wrong match. expected %s, got %s\n",
748 match_node_tests[i].path, match_node_tests[i].data,
749 (const char *)match->data);
750 continue;
751 }
752 unittest(1, "passed");
753 }
754}
755
756static struct resource test_bus_res = {
757 .start = 0xfffffff8,
758 .end = 0xfffffff9,
759 .flags = IORESOURCE_MEM,
760};
761static const struct platform_device_info test_bus_info = {
762 .name = "unittest-bus",
763};
764static void __init of_unittest_platform_populate(void)
765{
766 int irq, rc;
767 struct device_node *np, *child, *grandchild;
768 struct platform_device *pdev, *test_bus;
769 const struct of_device_id match[] = {
770 { .compatible = "test-device", },
771 {}
772 };
773
774 np = of_find_node_by_path("/testcase-data");
775 of_platform_populate(np, of_default_bus_match_table, NULL, NULL);
776
777
778 np = of_find_node_by_path("/testcase-data/testcase-device1");
779 pdev = of_find_device_by_node(np);
780 unittest(pdev, "device 1 creation failed\n");
781
782 irq = platform_get_irq(pdev, 0);
783 unittest(irq == -EPROBE_DEFER, "device deferred probe failed - %d\n", irq);
784
785
786 np = of_find_node_by_path("/testcase-data/testcase-device2");
787 pdev = of_find_device_by_node(np);
788 unittest(pdev, "device 2 creation failed\n");
789 irq = platform_get_irq(pdev, 0);
790 unittest(irq < 0 && irq != -EPROBE_DEFER, "device parsing error failed - %d\n", irq);
791
792 np = of_find_node_by_path("/testcase-data/platform-tests");
793 unittest(np, "No testcase data in device tree\n");
794 if (!np)
795 return;
796
797 test_bus = platform_device_register_full(&test_bus_info);
798 rc = PTR_ERR_OR_ZERO(test_bus);
799 unittest(!rc, "testbus registration failed; rc=%i\n", rc);
800 if (rc)
801 return;
802 test_bus->dev.of_node = np;
803
804
805
806
807
808
809
810
811 platform_device_add_resources(test_bus, &test_bus_res, 1);
812
813 of_platform_populate(np, match, NULL, &test_bus->dev);
814 for_each_child_of_node(np, child) {
815 for_each_child_of_node(child, grandchild)
816 unittest(of_find_device_by_node(grandchild),
817 "Could not create device for node '%s'\n",
818 grandchild->name);
819 }
820
821 of_platform_depopulate(&test_bus->dev);
822 for_each_child_of_node(np, child) {
823 for_each_child_of_node(child, grandchild)
824 unittest(!of_find_device_by_node(grandchild),
825 "device didn't get destroyed '%s'\n",
826 grandchild->name);
827 }
828
829 platform_device_unregister(test_bus);
830 of_node_put(np);
831}
832
833
834
835
836
837
838
839
840
841static void update_node_properties(struct device_node *np,
842 struct device_node *dup)
843{
844 struct property *prop;
845 struct device_node *child;
846
847 for_each_property_of_node(np, prop)
848 of_add_property(dup, prop);
849
850 for_each_child_of_node(np, child)
851 child->parent = dup;
852}
853
854
855
856
857
858
859
860static int attach_node_and_children(struct device_node *np)
861{
862 struct device_node *next, *dup, *child;
863 unsigned long flags;
864
865 dup = of_find_node_by_path(np->full_name);
866 if (dup) {
867 update_node_properties(np, dup);
868 return 0;
869 }
870
871 child = np->child;
872 np->child = NULL;
873
874 mutex_lock(&of_mutex);
875 raw_spin_lock_irqsave(&devtree_lock, flags);
876 np->sibling = np->parent->child;
877 np->parent->child = np;
878 of_node_clear_flag(np, OF_DETACHED);
879 raw_spin_unlock_irqrestore(&devtree_lock, flags);
880
881 __of_attach_node_sysfs(np);
882 mutex_unlock(&of_mutex);
883
884 while (child) {
885 next = child->sibling;
886 attach_node_and_children(child);
887 child = next;
888 }
889
890 return 0;
891}
892
893
894
895
896
897static int __init unittest_data_add(void)
898{
899 void *unittest_data;
900 struct device_node *unittest_data_node, *np;
901
902
903
904
905 extern uint8_t __dtb_testcases_begin[];
906 extern uint8_t __dtb_testcases_end[];
907 const int size = __dtb_testcases_end - __dtb_testcases_begin;
908 int rc;
909
910 if (!size) {
911 pr_warn("%s: No testcase data to attach; not running tests\n",
912 __func__);
913 return -ENODATA;
914 }
915
916
917 unittest_data = kmemdup(__dtb_testcases_begin, size, GFP_KERNEL);
918
919 if (!unittest_data) {
920 pr_warn("%s: Failed to allocate memory for unittest_data; "
921 "not running tests\n", __func__);
922 return -ENOMEM;
923 }
924 of_fdt_unflatten_tree(unittest_data, &unittest_data_node);
925 if (!unittest_data_node) {
926 pr_warn("%s: No tree to attach; not running tests\n", __func__);
927 return -ENODATA;
928 }
929 of_node_set_flag(unittest_data_node, OF_DETACHED);
930 rc = of_resolve_phandles(unittest_data_node);
931 if (rc) {
932 pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__, rc);
933 return -EINVAL;
934 }
935
936 if (!of_root) {
937 of_root = unittest_data_node;
938 for_each_of_allnodes(np)
939 __of_attach_node_sysfs(np);
940 of_aliases = of_find_node_by_path("/aliases");
941 of_chosen = of_find_node_by_path("/chosen");
942 return 0;
943 }
944
945
946 np = unittest_data_node->child;
947 while (np) {
948 struct device_node *next = np->sibling;
949
950 np->parent = of_root;
951 attach_node_and_children(np);
952 np = next;
953 }
954 return 0;
955}
956
957#ifdef CONFIG_OF_OVERLAY
958
959static int unittest_probe(struct platform_device *pdev)
960{
961 struct device *dev = &pdev->dev;
962 struct device_node *np = dev->of_node;
963
964 if (np == NULL) {
965 dev_err(dev, "No OF data for device\n");
966 return -EINVAL;
967
968 }
969
970 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
971
972 of_platform_populate(np, NULL, NULL, &pdev->dev);
973
974 return 0;
975}
976
977static int unittest_remove(struct platform_device *pdev)
978{
979 struct device *dev = &pdev->dev;
980 struct device_node *np = dev->of_node;
981
982 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
983 return 0;
984}
985
986static const struct of_device_id unittest_match[] = {
987 { .compatible = "unittest", },
988 {},
989};
990
991static struct platform_driver unittest_driver = {
992 .probe = unittest_probe,
993 .remove = unittest_remove,
994 .driver = {
995 .name = "unittest",
996 .of_match_table = of_match_ptr(unittest_match),
997 },
998};
999
1000
1001static struct platform_device *of_path_to_platform_device(const char *path)
1002{
1003 struct device_node *np;
1004 struct platform_device *pdev;
1005
1006 np = of_find_node_by_path(path);
1007 if (np == NULL)
1008 return NULL;
1009
1010 pdev = of_find_device_by_node(np);
1011 of_node_put(np);
1012
1013 return pdev;
1014}
1015
1016
1017static int of_path_platform_device_exists(const char *path)
1018{
1019 struct platform_device *pdev;
1020
1021 pdev = of_path_to_platform_device(path);
1022 platform_device_put(pdev);
1023 return pdev != NULL;
1024}
1025
1026#if IS_BUILTIN(CONFIG_I2C)
1027
1028
1029static struct i2c_client *of_path_to_i2c_client(const char *path)
1030{
1031 struct device_node *np;
1032 struct i2c_client *client;
1033
1034 np = of_find_node_by_path(path);
1035 if (np == NULL)
1036 return NULL;
1037
1038 client = of_find_i2c_device_by_node(np);
1039 of_node_put(np);
1040
1041 return client;
1042}
1043
1044
1045static int of_path_i2c_client_exists(const char *path)
1046{
1047 struct i2c_client *client;
1048
1049 client = of_path_to_i2c_client(path);
1050 if (client)
1051 put_device(&client->dev);
1052 return client != NULL;
1053}
1054#else
1055static int of_path_i2c_client_exists(const char *path)
1056{
1057 return 0;
1058}
1059#endif
1060
1061enum overlay_type {
1062 PDEV_OVERLAY,
1063 I2C_OVERLAY
1064};
1065
1066static int of_path_device_type_exists(const char *path,
1067 enum overlay_type ovtype)
1068{
1069 switch (ovtype) {
1070 case PDEV_OVERLAY:
1071 return of_path_platform_device_exists(path);
1072 case I2C_OVERLAY:
1073 return of_path_i2c_client_exists(path);
1074 }
1075 return 0;
1076}
1077
1078static const char *unittest_path(int nr, enum overlay_type ovtype)
1079{
1080 const char *base;
1081 static char buf[256];
1082
1083 switch (ovtype) {
1084 case PDEV_OVERLAY:
1085 base = "/testcase-data/overlay-node/test-bus";
1086 break;
1087 case I2C_OVERLAY:
1088 base = "/testcase-data/overlay-node/test-bus/i2c-test-bus";
1089 break;
1090 default:
1091 buf[0] = '\0';
1092 return buf;
1093 }
1094 snprintf(buf, sizeof(buf) - 1, "%s/test-unittest%d", base, nr);
1095 buf[sizeof(buf) - 1] = '\0';
1096 return buf;
1097}
1098
1099static int of_unittest_device_exists(int unittest_nr, enum overlay_type ovtype)
1100{
1101 const char *path;
1102
1103 path = unittest_path(unittest_nr, ovtype);
1104
1105 switch (ovtype) {
1106 case PDEV_OVERLAY:
1107 return of_path_platform_device_exists(path);
1108 case I2C_OVERLAY:
1109 return of_path_i2c_client_exists(path);
1110 }
1111 return 0;
1112}
1113
1114static const char *overlay_path(int nr)
1115{
1116 static char buf[256];
1117
1118 snprintf(buf, sizeof(buf) - 1,
1119 "/testcase-data/overlay%d", nr);
1120 buf[sizeof(buf) - 1] = '\0';
1121
1122 return buf;
1123}
1124
1125static const char *bus_path = "/testcase-data/overlay-node/test-bus";
1126
1127
1128#define MAX_UNITTEST_OVERLAYS 256
1129static unsigned long overlay_id_bits[BITS_TO_LONGS(MAX_UNITTEST_OVERLAYS)];
1130static int overlay_first_id = -1;
1131
1132static void of_unittest_track_overlay(int id)
1133{
1134 if (overlay_first_id < 0)
1135 overlay_first_id = id;
1136 id -= overlay_first_id;
1137
1138
1139 BUG_ON(id >= MAX_UNITTEST_OVERLAYS);
1140 overlay_id_bits[BIT_WORD(id)] |= BIT_MASK(id);
1141}
1142
1143static void of_unittest_untrack_overlay(int id)
1144{
1145 if (overlay_first_id < 0)
1146 return;
1147 id -= overlay_first_id;
1148 BUG_ON(id >= MAX_UNITTEST_OVERLAYS);
1149 overlay_id_bits[BIT_WORD(id)] &= ~BIT_MASK(id);
1150}
1151
1152static void of_unittest_destroy_tracked_overlays(void)
1153{
1154 int id, ret, defers;
1155
1156 if (overlay_first_id < 0)
1157 return;
1158
1159
1160 do {
1161 defers = 0;
1162
1163 for (id = MAX_UNITTEST_OVERLAYS - 1; id >= 0; id--) {
1164 if (!(overlay_id_bits[BIT_WORD(id)] & BIT_MASK(id)))
1165 continue;
1166
1167 ret = of_overlay_destroy(id + overlay_first_id);
1168 if (ret == -ENODEV) {
1169 pr_warn("%s: no overlay to destroy for #%d\n",
1170 __func__, id + overlay_first_id);
1171 continue;
1172 }
1173 if (ret != 0) {
1174 defers++;
1175 pr_warn("%s: overlay destroy failed for #%d\n",
1176 __func__, id + overlay_first_id);
1177 continue;
1178 }
1179
1180 overlay_id_bits[BIT_WORD(id)] &= ~BIT_MASK(id);
1181 }
1182 } while (defers > 0);
1183}
1184
1185static int of_unittest_apply_overlay(int unittest_nr, int overlay_nr,
1186 int *overlay_id)
1187{
1188 struct device_node *np = NULL;
1189 int ret, id = -1;
1190
1191 np = of_find_node_by_path(overlay_path(overlay_nr));
1192 if (np == NULL) {
1193 unittest(0, "could not find overlay node @\"%s\"\n",
1194 overlay_path(overlay_nr));
1195 ret = -EINVAL;
1196 goto out;
1197 }
1198
1199 ret = of_overlay_create(np);
1200 if (ret < 0) {
1201 unittest(0, "could not create overlay from \"%s\"\n",
1202 overlay_path(overlay_nr));
1203 goto out;
1204 }
1205 id = ret;
1206 of_unittest_track_overlay(id);
1207
1208 ret = 0;
1209
1210out:
1211 of_node_put(np);
1212
1213 if (overlay_id)
1214 *overlay_id = id;
1215
1216 return ret;
1217}
1218
1219
1220static int of_unittest_apply_overlay_check(int overlay_nr, int unittest_nr,
1221 int before, int after, enum overlay_type ovtype)
1222{
1223 int ret;
1224
1225
1226 if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
1227 unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1228 overlay_path(overlay_nr),
1229 unittest_path(unittest_nr, ovtype),
1230 !before ? "enabled" : "disabled");
1231 return -EINVAL;
1232 }
1233
1234 ret = of_unittest_apply_overlay(overlay_nr, unittest_nr, NULL);
1235 if (ret != 0) {
1236
1237 return ret;
1238 }
1239
1240
1241 if (of_unittest_device_exists(unittest_nr, ovtype) != after) {
1242 unittest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n",
1243 overlay_path(overlay_nr),
1244 unittest_path(unittest_nr, ovtype),
1245 !after ? "enabled" : "disabled");
1246 return -EINVAL;
1247 }
1248
1249 return 0;
1250}
1251
1252
1253static int of_unittest_apply_revert_overlay_check(int overlay_nr,
1254 int unittest_nr, int before, int after,
1255 enum overlay_type ovtype)
1256{
1257 int ret, ov_id;
1258
1259
1260 if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
1261 unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1262 overlay_path(overlay_nr),
1263 unittest_path(unittest_nr, ovtype),
1264 !before ? "enabled" : "disabled");
1265 return -EINVAL;
1266 }
1267
1268
1269 ret = of_unittest_apply_overlay(overlay_nr, unittest_nr, &ov_id);
1270 if (ret != 0) {
1271
1272 return ret;
1273 }
1274
1275
1276 if (of_unittest_device_exists(unittest_nr, ovtype) != after) {
1277 unittest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n",
1278 overlay_path(overlay_nr),
1279 unittest_path(unittest_nr, ovtype),
1280 !after ? "enabled" : "disabled");
1281 return -EINVAL;
1282 }
1283
1284 ret = of_overlay_destroy(ov_id);
1285 if (ret != 0) {
1286 unittest(0, "overlay @\"%s\" failed to be destroyed @\"%s\"\n",
1287 overlay_path(overlay_nr),
1288 unittest_path(unittest_nr, ovtype));
1289 return ret;
1290 }
1291
1292
1293 if (of_unittest_device_exists(unittest_nr, PDEV_OVERLAY) != before) {
1294 unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1295 overlay_path(overlay_nr),
1296 unittest_path(unittest_nr, ovtype),
1297 !before ? "enabled" : "disabled");
1298 return -EINVAL;
1299 }
1300
1301 return 0;
1302}
1303
1304
1305static void of_unittest_overlay_0(void)
1306{
1307 int ret;
1308
1309
1310 ret = of_unittest_apply_overlay_check(0, 0, 0, 1, PDEV_OVERLAY);
1311 if (ret != 0)
1312 return;
1313
1314 unittest(1, "overlay test %d passed\n", 0);
1315}
1316
1317
1318static void of_unittest_overlay_1(void)
1319{
1320 int ret;
1321
1322
1323 ret = of_unittest_apply_overlay_check(1, 1, 1, 0, PDEV_OVERLAY);
1324 if (ret != 0)
1325 return;
1326
1327 unittest(1, "overlay test %d passed\n", 1);
1328}
1329
1330
1331static void of_unittest_overlay_2(void)
1332{
1333 int ret;
1334
1335
1336 ret = of_unittest_apply_overlay_check(2, 2, 0, 1, PDEV_OVERLAY);
1337 if (ret != 0)
1338 return;
1339
1340 unittest(1, "overlay test %d passed\n", 2);
1341}
1342
1343
1344static void of_unittest_overlay_3(void)
1345{
1346 int ret;
1347
1348
1349 ret = of_unittest_apply_overlay_check(3, 3, 1, 0, PDEV_OVERLAY);
1350 if (ret != 0)
1351 return;
1352
1353 unittest(1, "overlay test %d passed\n", 3);
1354}
1355
1356
1357static void of_unittest_overlay_4(void)
1358{
1359 int ret;
1360
1361
1362 ret = of_unittest_apply_overlay_check(4, 4, 0, 1, PDEV_OVERLAY);
1363 if (ret != 0)
1364 return;
1365
1366 unittest(1, "overlay test %d passed\n", 4);
1367}
1368
1369
1370static void of_unittest_overlay_5(void)
1371{
1372 int ret;
1373
1374
1375 ret = of_unittest_apply_revert_overlay_check(5, 5, 0, 1, PDEV_OVERLAY);
1376 if (ret != 0)
1377 return;
1378
1379 unittest(1, "overlay test %d passed\n", 5);
1380}
1381
1382
1383static void of_unittest_overlay_6(void)
1384{
1385 struct device_node *np;
1386 int ret, i, ov_id[2];
1387 int overlay_nr = 6, unittest_nr = 6;
1388 int before = 0, after = 1;
1389
1390
1391 for (i = 0; i < 2; i++) {
1392 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
1393 != before) {
1394 unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1395 overlay_path(overlay_nr + i),
1396 unittest_path(unittest_nr + i,
1397 PDEV_OVERLAY),
1398 !before ? "enabled" : "disabled");
1399 return;
1400 }
1401 }
1402
1403
1404 for (i = 0; i < 2; i++) {
1405
1406 np = of_find_node_by_path(overlay_path(overlay_nr + i));
1407 if (np == NULL) {
1408 unittest(0, "could not find overlay node @\"%s\"\n",
1409 overlay_path(overlay_nr + i));
1410 return;
1411 }
1412
1413 ret = of_overlay_create(np);
1414 if (ret < 0) {
1415 unittest(0, "could not create overlay from \"%s\"\n",
1416 overlay_path(overlay_nr + i));
1417 return;
1418 }
1419 ov_id[i] = ret;
1420 of_unittest_track_overlay(ov_id[i]);
1421 }
1422
1423 for (i = 0; i < 2; i++) {
1424
1425 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
1426 != after) {
1427 unittest(0, "overlay @\"%s\" failed @\"%s\" %s\n",
1428 overlay_path(overlay_nr + i),
1429 unittest_path(unittest_nr + i,
1430 PDEV_OVERLAY),
1431 !after ? "enabled" : "disabled");
1432 return;
1433 }
1434 }
1435
1436 for (i = 1; i >= 0; i--) {
1437 ret = of_overlay_destroy(ov_id[i]);
1438 if (ret != 0) {
1439 unittest(0, "overlay @\"%s\" failed destroy @\"%s\"\n",
1440 overlay_path(overlay_nr + i),
1441 unittest_path(unittest_nr + i,
1442 PDEV_OVERLAY));
1443 return;
1444 }
1445 of_unittest_untrack_overlay(ov_id[i]);
1446 }
1447
1448 for (i = 0; i < 2; i++) {
1449
1450 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
1451 != before) {
1452 unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1453 overlay_path(overlay_nr + i),
1454 unittest_path(unittest_nr + i,
1455 PDEV_OVERLAY),
1456 !before ? "enabled" : "disabled");
1457 return;
1458 }
1459 }
1460
1461 unittest(1, "overlay test %d passed\n", 6);
1462}
1463
1464
1465static void of_unittest_overlay_8(void)
1466{
1467 struct device_node *np;
1468 int ret, i, ov_id[2];
1469 int overlay_nr = 8, unittest_nr = 8;
1470
1471
1472
1473
1474 for (i = 0; i < 2; i++) {
1475
1476 np = of_find_node_by_path(overlay_path(overlay_nr + i));
1477 if (np == NULL) {
1478 unittest(0, "could not find overlay node @\"%s\"\n",
1479 overlay_path(overlay_nr + i));
1480 return;
1481 }
1482
1483 ret = of_overlay_create(np);
1484 if (ret < 0) {
1485 unittest(0, "could not create overlay from \"%s\"\n",
1486 overlay_path(overlay_nr + i));
1487 return;
1488 }
1489 ov_id[i] = ret;
1490 of_unittest_track_overlay(ov_id[i]);
1491 }
1492
1493
1494 ret = of_overlay_destroy(ov_id[0]);
1495 if (ret == 0) {
1496 unittest(0, "overlay @\"%s\" was destroyed @\"%s\"\n",
1497 overlay_path(overlay_nr + 0),
1498 unittest_path(unittest_nr,
1499 PDEV_OVERLAY));
1500 return;
1501 }
1502
1503
1504 for (i = 1; i >= 0; i--) {
1505 ret = of_overlay_destroy(ov_id[i]);
1506 if (ret != 0) {
1507 unittest(0, "overlay @\"%s\" not destroyed @\"%s\"\n",
1508 overlay_path(overlay_nr + i),
1509 unittest_path(unittest_nr,
1510 PDEV_OVERLAY));
1511 return;
1512 }
1513 of_unittest_untrack_overlay(ov_id[i]);
1514 }
1515
1516 unittest(1, "overlay test %d passed\n", 8);
1517}
1518
1519
1520static void of_unittest_overlay_10(void)
1521{
1522 int ret;
1523 char *child_path;
1524
1525
1526 ret = of_unittest_apply_overlay_check(10, 10, 0, 1, PDEV_OVERLAY);
1527 if (unittest(ret == 0,
1528 "overlay test %d failed; overlay application\n", 10))
1529 return;
1530
1531 child_path = kasprintf(GFP_KERNEL, "%s/test-unittest101",
1532 unittest_path(10, PDEV_OVERLAY));
1533 if (unittest(child_path, "overlay test %d failed; kasprintf\n", 10))
1534 return;
1535
1536 ret = of_path_device_type_exists(child_path, PDEV_OVERLAY);
1537 kfree(child_path);
1538 if (unittest(ret, "overlay test %d failed; no child device\n", 10))
1539 return;
1540}
1541
1542
1543static void of_unittest_overlay_11(void)
1544{
1545 int ret;
1546
1547
1548 ret = of_unittest_apply_revert_overlay_check(11, 11, 0, 1,
1549 PDEV_OVERLAY);
1550 if (unittest(ret == 0,
1551 "overlay test %d failed; overlay application\n", 11))
1552 return;
1553}
1554
1555#if IS_BUILTIN(CONFIG_I2C) && IS_ENABLED(CONFIG_OF_OVERLAY)
1556
1557struct unittest_i2c_bus_data {
1558 struct platform_device *pdev;
1559 struct i2c_adapter adap;
1560};
1561
1562static int unittest_i2c_master_xfer(struct i2c_adapter *adap,
1563 struct i2c_msg *msgs, int num)
1564{
1565 struct unittest_i2c_bus_data *std = i2c_get_adapdata(adap);
1566
1567 (void)std;
1568
1569 return num;
1570}
1571
1572static u32 unittest_i2c_functionality(struct i2c_adapter *adap)
1573{
1574 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
1575}
1576
1577static const struct i2c_algorithm unittest_i2c_algo = {
1578 .master_xfer = unittest_i2c_master_xfer,
1579 .functionality = unittest_i2c_functionality,
1580};
1581
1582static int unittest_i2c_bus_probe(struct platform_device *pdev)
1583{
1584 struct device *dev = &pdev->dev;
1585 struct device_node *np = dev->of_node;
1586 struct unittest_i2c_bus_data *std;
1587 struct i2c_adapter *adap;
1588 int ret;
1589
1590 if (np == NULL) {
1591 dev_err(dev, "No OF data for device\n");
1592 return -EINVAL;
1593
1594 }
1595
1596 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1597
1598 std = devm_kzalloc(dev, sizeof(*std), GFP_KERNEL);
1599 if (!std) {
1600 dev_err(dev, "Failed to allocate unittest i2c data\n");
1601 return -ENOMEM;
1602 }
1603
1604
1605 std->pdev = pdev;
1606 platform_set_drvdata(pdev, std);
1607
1608 adap = &std->adap;
1609 i2c_set_adapdata(adap, std);
1610 adap->nr = -1;
1611 strlcpy(adap->name, pdev->name, sizeof(adap->name));
1612 adap->class = I2C_CLASS_DEPRECATED;
1613 adap->algo = &unittest_i2c_algo;
1614 adap->dev.parent = dev;
1615 adap->dev.of_node = dev->of_node;
1616 adap->timeout = 5 * HZ;
1617 adap->retries = 3;
1618
1619 ret = i2c_add_numbered_adapter(adap);
1620 if (ret != 0) {
1621 dev_err(dev, "Failed to add I2C adapter\n");
1622 return ret;
1623 }
1624
1625 return 0;
1626}
1627
1628static int unittest_i2c_bus_remove(struct platform_device *pdev)
1629{
1630 struct device *dev = &pdev->dev;
1631 struct device_node *np = dev->of_node;
1632 struct unittest_i2c_bus_data *std = platform_get_drvdata(pdev);
1633
1634 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1635 i2c_del_adapter(&std->adap);
1636
1637 return 0;
1638}
1639
1640static const struct of_device_id unittest_i2c_bus_match[] = {
1641 { .compatible = "unittest-i2c-bus", },
1642 {},
1643};
1644
1645static struct platform_driver unittest_i2c_bus_driver = {
1646 .probe = unittest_i2c_bus_probe,
1647 .remove = unittest_i2c_bus_remove,
1648 .driver = {
1649 .name = "unittest-i2c-bus",
1650 .of_match_table = of_match_ptr(unittest_i2c_bus_match),
1651 },
1652};
1653
1654static int unittest_i2c_dev_probe(struct i2c_client *client,
1655 const struct i2c_device_id *id)
1656{
1657 struct device *dev = &client->dev;
1658 struct device_node *np = client->dev.of_node;
1659
1660 if (!np) {
1661 dev_err(dev, "No OF node\n");
1662 return -EINVAL;
1663 }
1664
1665 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1666
1667 return 0;
1668};
1669
1670static int unittest_i2c_dev_remove(struct i2c_client *client)
1671{
1672 struct device *dev = &client->dev;
1673 struct device_node *np = client->dev.of_node;
1674
1675 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1676 return 0;
1677}
1678
1679static const struct i2c_device_id unittest_i2c_dev_id[] = {
1680 { .name = "unittest-i2c-dev" },
1681 { }
1682};
1683
1684static struct i2c_driver unittest_i2c_dev_driver = {
1685 .driver = {
1686 .name = "unittest-i2c-dev",
1687 },
1688 .probe = unittest_i2c_dev_probe,
1689 .remove = unittest_i2c_dev_remove,
1690 .id_table = unittest_i2c_dev_id,
1691};
1692
1693#if IS_BUILTIN(CONFIG_I2C_MUX)
1694
1695struct unittest_i2c_mux_data {
1696 int nchans;
1697 struct i2c_adapter *adap[];
1698};
1699
1700static int unittest_i2c_mux_select_chan(struct i2c_adapter *adap,
1701 void *client, u32 chan)
1702{
1703 return 0;
1704}
1705
1706static int unittest_i2c_mux_probe(struct i2c_client *client,
1707 const struct i2c_device_id *id)
1708{
1709 int ret, i, nchans, size;
1710 struct device *dev = &client->dev;
1711 struct i2c_adapter *adap = to_i2c_adapter(dev->parent);
1712 struct device_node *np = client->dev.of_node, *child;
1713 struct unittest_i2c_mux_data *stm;
1714 u32 reg, max_reg;
1715
1716 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1717
1718 if (!np) {
1719 dev_err(dev, "No OF node\n");
1720 return -EINVAL;
1721 }
1722
1723 max_reg = (u32)-1;
1724 for_each_child_of_node(np, child) {
1725 ret = of_property_read_u32(child, "reg", ®);
1726 if (ret)
1727 continue;
1728 if (max_reg == (u32)-1 || reg > max_reg)
1729 max_reg = reg;
1730 }
1731 nchans = max_reg == (u32)-1 ? 0 : max_reg + 1;
1732 if (nchans == 0) {
1733 dev_err(dev, "No channels\n");
1734 return -EINVAL;
1735 }
1736
1737 size = offsetof(struct unittest_i2c_mux_data, adap[nchans]);
1738 stm = devm_kzalloc(dev, size, GFP_KERNEL);
1739 if (!stm) {
1740 dev_err(dev, "Out of memory\n");
1741 return -ENOMEM;
1742 }
1743 stm->nchans = nchans;
1744 for (i = 0; i < nchans; i++) {
1745 stm->adap[i] = i2c_add_mux_adapter(adap, dev, client,
1746 0, i, 0, unittest_i2c_mux_select_chan, NULL);
1747 if (!stm->adap[i]) {
1748 dev_err(dev, "Failed to register mux #%d\n", i);
1749 for (i--; i >= 0; i--)
1750 i2c_del_mux_adapter(stm->adap[i]);
1751 return -ENODEV;
1752 }
1753 }
1754
1755 i2c_set_clientdata(client, stm);
1756
1757 return 0;
1758};
1759
1760static int unittest_i2c_mux_remove(struct i2c_client *client)
1761{
1762 struct device *dev = &client->dev;
1763 struct device_node *np = client->dev.of_node;
1764 struct unittest_i2c_mux_data *stm = i2c_get_clientdata(client);
1765 int i;
1766
1767 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1768 for (i = stm->nchans - 1; i >= 0; i--)
1769 i2c_del_mux_adapter(stm->adap[i]);
1770 return 0;
1771}
1772
1773static const struct i2c_device_id unittest_i2c_mux_id[] = {
1774 { .name = "unittest-i2c-mux" },
1775 { }
1776};
1777
1778static struct i2c_driver unittest_i2c_mux_driver = {
1779 .driver = {
1780 .name = "unittest-i2c-mux",
1781 },
1782 .probe = unittest_i2c_mux_probe,
1783 .remove = unittest_i2c_mux_remove,
1784 .id_table = unittest_i2c_mux_id,
1785};
1786
1787#endif
1788
1789static int of_unittest_overlay_i2c_init(void)
1790{
1791 int ret;
1792
1793 ret = i2c_add_driver(&unittest_i2c_dev_driver);
1794 if (unittest(ret == 0,
1795 "could not register unittest i2c device driver\n"))
1796 return ret;
1797
1798 ret = platform_driver_register(&unittest_i2c_bus_driver);
1799 if (unittest(ret == 0,
1800 "could not register unittest i2c bus driver\n"))
1801 return ret;
1802
1803#if IS_BUILTIN(CONFIG_I2C_MUX)
1804 ret = i2c_add_driver(&unittest_i2c_mux_driver);
1805 if (unittest(ret == 0,
1806 "could not register unittest i2c mux driver\n"))
1807 return ret;
1808#endif
1809
1810 return 0;
1811}
1812
1813static void of_unittest_overlay_i2c_cleanup(void)
1814{
1815#if IS_BUILTIN(CONFIG_I2C_MUX)
1816 i2c_del_driver(&unittest_i2c_mux_driver);
1817#endif
1818 platform_driver_unregister(&unittest_i2c_bus_driver);
1819 i2c_del_driver(&unittest_i2c_dev_driver);
1820}
1821
1822static void of_unittest_overlay_i2c_12(void)
1823{
1824 int ret;
1825
1826
1827 ret = of_unittest_apply_overlay_check(12, 12, 0, 1, I2C_OVERLAY);
1828 if (ret != 0)
1829 return;
1830
1831 unittest(1, "overlay test %d passed\n", 12);
1832}
1833
1834
1835static void of_unittest_overlay_i2c_13(void)
1836{
1837 int ret;
1838
1839
1840 ret = of_unittest_apply_overlay_check(13, 13, 1, 0, I2C_OVERLAY);
1841 if (ret != 0)
1842 return;
1843
1844 unittest(1, "overlay test %d passed\n", 13);
1845}
1846
1847
1848static void of_unittest_overlay_i2c_14(void)
1849{
1850}
1851
1852static void of_unittest_overlay_i2c_15(void)
1853{
1854 int ret;
1855
1856
1857 ret = of_unittest_apply_overlay_check(16, 15, 0, 1, I2C_OVERLAY);
1858 if (ret != 0)
1859 return;
1860
1861 unittest(1, "overlay test %d passed\n", 15);
1862}
1863
1864#else
1865
1866static inline void of_unittest_overlay_i2c_14(void) { }
1867static inline void of_unittest_overlay_i2c_15(void) { }
1868
1869#endif
1870
1871static void __init of_unittest_overlay(void)
1872{
1873 struct device_node *bus_np = NULL;
1874 int ret;
1875
1876 ret = platform_driver_register(&unittest_driver);
1877 if (ret != 0) {
1878 unittest(0, "could not register unittest driver\n");
1879 goto out;
1880 }
1881
1882 bus_np = of_find_node_by_path(bus_path);
1883 if (bus_np == NULL) {
1884 unittest(0, "could not find bus_path \"%s\"\n", bus_path);
1885 goto out;
1886 }
1887
1888 ret = of_platform_populate(bus_np, of_default_bus_match_table,
1889 NULL, NULL);
1890 if (ret != 0) {
1891 unittest(0, "could not populate bus @ \"%s\"\n", bus_path);
1892 goto out;
1893 }
1894
1895 if (!of_unittest_device_exists(100, PDEV_OVERLAY)) {
1896 unittest(0, "could not find unittest0 @ \"%s\"\n",
1897 unittest_path(100, PDEV_OVERLAY));
1898 goto out;
1899 }
1900
1901 if (of_unittest_device_exists(101, PDEV_OVERLAY)) {
1902 unittest(0, "unittest1 @ \"%s\" should not exist\n",
1903 unittest_path(101, PDEV_OVERLAY));
1904 goto out;
1905 }
1906
1907 unittest(1, "basic infrastructure of overlays passed");
1908
1909
1910 of_unittest_overlay_0();
1911 of_unittest_overlay_1();
1912 of_unittest_overlay_2();
1913 of_unittest_overlay_3();
1914 of_unittest_overlay_4();
1915 of_unittest_overlay_5();
1916 of_unittest_overlay_6();
1917 of_unittest_overlay_8();
1918
1919 of_unittest_overlay_10();
1920 of_unittest_overlay_11();
1921
1922#if IS_BUILTIN(CONFIG_I2C)
1923 if (unittest(of_unittest_overlay_i2c_init() == 0, "i2c init failed\n"))
1924 goto out;
1925
1926 of_unittest_overlay_i2c_12();
1927 of_unittest_overlay_i2c_13();
1928 of_unittest_overlay_i2c_14();
1929 of_unittest_overlay_i2c_15();
1930
1931 of_unittest_overlay_i2c_cleanup();
1932#endif
1933
1934 of_unittest_destroy_tracked_overlays();
1935
1936out:
1937 of_node_put(bus_np);
1938}
1939
1940#else
1941static inline void __init of_unittest_overlay(void) { }
1942#endif
1943
1944static int __init of_unittest(void)
1945{
1946 struct device_node *np;
1947 int res;
1948
1949
1950 res = unittest_data_add();
1951 if (res)
1952 return res;
1953 if (!of_aliases)
1954 of_aliases = of_find_node_by_path("/aliases");
1955
1956 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
1957 if (!np) {
1958 pr_info("No testcase data in device tree; not running tests\n");
1959 return 0;
1960 }
1961 of_node_put(np);
1962
1963 pr_info("start of unittest - you will see error messages\n");
1964 of_unittest_check_tree_linkage();
1965 of_unittest_check_phandles();
1966 of_unittest_find_node_by_name();
1967 of_unittest_dynamic();
1968 of_unittest_parse_phandle_with_args();
1969 of_unittest_property_string();
1970 of_unittest_property_copy();
1971 of_unittest_changeset();
1972 of_unittest_parse_interrupts();
1973 of_unittest_parse_interrupts_extended();
1974 of_unittest_match_node();
1975 of_unittest_platform_populate();
1976 of_unittest_overlay();
1977
1978
1979 of_unittest_check_tree_linkage();
1980
1981 pr_info("end of unittest - %i passed, %i failed\n",
1982 unittest_results.passed, unittest_results.failed);
1983
1984 return 0;
1985}
1986late_initcall(of_unittest);
1987
