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Linux 4.2.1
[linux/fpc-iii.git] / drivers / of / unittest.c
blob9f71770b6226f9ed3d4ceab7bb95ea3f4ba55b6c
1 /*
2 * Self tests for device tree subsystem
3 */
4
5 #define pr_fmt(fmt) "### dt-test ### " fmt
6
7 #include <linux/clk.h>
8 #include <linux/err.h>
9 #include <linux/errno.h>
10 #include <linux/hashtable.h>
11 #include <linux/module.h>
12 #include <linux/of.h>
13 #include <linux/of_fdt.h>
14 #include <linux/of_irq.h>
15 #include <linux/of_platform.h>
16 #include <linux/list.h>
17 #include <linux/mutex.h>
18 #include <linux/slab.h>
19 #include <linux/device.h>
20 #include <linux/platform_device.h>
21 #include <linux/of_platform.h>
22
23 #include <linux/i2c.h>
24 #include <linux/i2c-mux.h>
25
26 #include <linux/bitops.h>
27
28 #include "of_private.h"
29
30 static struct unittest_results {
31 int passed;
32 int failed;
33 } unittest_results;
34
35 #define unittest(result, fmt, ...) ({ \
36 bool failed = !(result); \
37 if (failed) { \
38 unittest_results.failed++; \
39 pr_err("FAIL %s():%i " fmt, __func__, __LINE__, ##__VA_ARGS__); \
40 } else { \
41 unittest_results.passed++; \
42 pr_debug("pass %s():%i\n", __func__, __LINE__); \
43 } \
44 failed; \
45 })
46
47 static void __init of_unittest_find_node_by_name(void)
48 {
49 struct device_node *np;
50 const char *options;
51
52 np = of_find_node_by_path("/testcase-data");
53 unittest(np && !strcmp("/testcase-data", np->full_name),
54 "find /testcase-data failed\n");
55 of_node_put(np);
56
57 /* Test if trailing '/' works */
58 np = of_find_node_by_path("/testcase-data/");
59 unittest(!np, "trailing '/' on /testcase-data/ should fail\n");
60
61 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
62 unittest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", np->full_name),
63 "find /testcase-data/phandle-tests/consumer-a failed\n");
64 of_node_put(np);
65
66 np = of_find_node_by_path("testcase-alias");
67 unittest(np && !strcmp("/testcase-data", np->full_name),
68 "find testcase-alias failed\n");
69 of_node_put(np);
70
71 /* Test if trailing '/' works on aliases */
72 np = of_find_node_by_path("testcase-alias/");
73 unittest(!np, "trailing '/' on testcase-alias/ should fail\n");
74
75 np = of_find_node_by_path("testcase-alias/phandle-tests/consumer-a");
76 unittest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", np->full_name),
77 "find testcase-alias/phandle-tests/consumer-a failed\n");
78 of_node_put(np);
79
80 np = of_find_node_by_path("/testcase-data/missing-path");
81 unittest(!np, "non-existent path returned node %s\n", np->full_name);
82 of_node_put(np);
83
84 np = of_find_node_by_path("missing-alias");
85 unittest(!np, "non-existent alias returned node %s\n", np->full_name);
86 of_node_put(np);
87
88 np = of_find_node_by_path("testcase-alias/missing-path");
89 unittest(!np, "non-existent alias with relative path returned node %s\n", np->full_name);
90 of_node_put(np);
91
92 np = of_find_node_opts_by_path("/testcase-data:testoption", &options);
93 unittest(np && !strcmp("testoption", options),
94 "option path test failed\n");
95 of_node_put(np);
96
97 np = of_find_node_opts_by_path("/testcase-data:test/option", &options);
98 unittest(np && !strcmp("test/option", options),
99 "option path test, subcase #1 failed\n");
100 of_node_put(np);
101
102 np = of_find_node_opts_by_path("/testcase-data/testcase-device1:test/option", &options);
103 unittest(np && !strcmp("test/option", options),
104 "option path test, subcase #2 failed\n");
105 of_node_put(np);
106
107 np = of_find_node_opts_by_path("/testcase-data:testoption", NULL);
108 unittest(np, "NULL option path test failed\n");
109 of_node_put(np);
110
111 np = of_find_node_opts_by_path("testcase-alias:testaliasoption",
112 &options);
113 unittest(np && !strcmp("testaliasoption", options),
114 "option alias path test failed\n");
115 of_node_put(np);
116
117 np = of_find_node_opts_by_path("testcase-alias:test/alias/option",
118 &options);
119 unittest(np && !strcmp("test/alias/option", options),
120 "option alias path test, subcase #1 failed\n");
121 of_node_put(np);
122
123 np = of_find_node_opts_by_path("testcase-alias:testaliasoption", NULL);
124 unittest(np, "NULL option alias path test failed\n");
125 of_node_put(np);
126
127 options = "testoption";
128 np = of_find_node_opts_by_path("testcase-alias", &options);
129 unittest(np && !options, "option clearing test failed\n");
130 of_node_put(np);
131
132 options = "testoption";
133 np = of_find_node_opts_by_path("/", &options);
134 unittest(np && !options, "option clearing root node test failed\n");
135 of_node_put(np);
136 }
137
138 static void __init of_unittest_dynamic(void)
139 {
140 struct device_node *np;
141 struct property *prop;
142
143 np = of_find_node_by_path("/testcase-data");
144 if (!np) {
145 pr_err("missing testcase data\n");
146 return;
147 }
148
149 /* Array of 4 properties for the purpose of testing */
150 prop = kzalloc(sizeof(*prop) * 4, GFP_KERNEL);
151 if (!prop) {
152 unittest(0, "kzalloc() failed\n");
153 return;
154 }
155
156 /* Add a new property - should pass*/
157 prop->name = "new-property";
158 prop->value = "new-property-data";
159 prop->length = strlen(prop->value);
160 unittest(of_add_property(np, prop) == 0, "Adding a new property failed\n");
161
162 /* Try to add an existing property - should fail */
163 prop++;
164 prop->name = "new-property";
165 prop->value = "new-property-data-should-fail";
166 prop->length = strlen(prop->value);
167 unittest(of_add_property(np, prop) != 0,
168 "Adding an existing property should have failed\n");
169
170 /* Try to modify an existing property - should pass */
171 prop->value = "modify-property-data-should-pass";
172 prop->length = strlen(prop->value);
173 unittest(of_update_property(np, prop) == 0,
174 "Updating an existing property should have passed\n");
175
176 /* Try to modify non-existent property - should pass*/
177 prop++;
178 prop->name = "modify-property";
179 prop->value = "modify-missing-property-data-should-pass";
180 prop->length = strlen(prop->value);
181 unittest(of_update_property(np, prop) == 0,
182 "Updating a missing property should have passed\n");
183
184 /* Remove property - should pass */
185 unittest(of_remove_property(np, prop) == 0,
186 "Removing a property should have passed\n");
187
188 /* Adding very large property - should pass */
189 prop++;
190 prop->name = "large-property-PAGE_SIZEx8";
191 prop->length = PAGE_SIZE * 8;
192 prop->value = kzalloc(prop->length, GFP_KERNEL);
193 unittest(prop->value != NULL, "Unable to allocate large buffer\n");
194 if (prop->value)
195 unittest(of_add_property(np, prop) == 0,
196 "Adding a large property should have passed\n");
197 }
198
199 static int __init of_unittest_check_node_linkage(struct device_node *np)
200 {
201 struct device_node *child;
202 int count = 0, rc;
203
204 for_each_child_of_node(np, child) {
205 if (child->parent != np) {
206 pr_err("Child node %s links to wrong parent %s\n",
207 child->name, np->name);
208 return -EINVAL;
209 }
210
211 rc = of_unittest_check_node_linkage(child);
212 if (rc < 0)
213 return rc;
214 count += rc;
215 }
216
217 return count + 1;
218 }
219
220 static void __init of_unittest_check_tree_linkage(void)
221 {
222 struct device_node *np;
223 int allnode_count = 0, child_count;
224
225 if (!of_root)
226 return;
227
228 for_each_of_allnodes(np)
229 allnode_count++;
230 child_count = of_unittest_check_node_linkage(of_root);
231
232 unittest(child_count > 0, "Device node data structure is corrupted\n");
233 unittest(child_count == allnode_count,
234 "allnodes list size (%i) doesn't match sibling lists size (%i)\n",
235 allnode_count, child_count);
236 pr_debug("allnodes list size (%i); sibling lists size (%i)\n", allnode_count, child_count);
237 }
238
239 struct node_hash {
240 struct hlist_node node;
241 struct device_node *np;
242 };
243
244 static DEFINE_HASHTABLE(phandle_ht, 8);
245 static void __init of_unittest_check_phandles(void)
246 {
247 struct device_node *np;
248 struct node_hash *nh;
249 struct hlist_node *tmp;
250 int i, dup_count = 0, phandle_count = 0;
251
252 for_each_of_allnodes(np) {
253 if (!np->phandle)
254 continue;
255
256 hash_for_each_possible(phandle_ht, nh, node, np->phandle) {
257 if (nh->np->phandle == np->phandle) {
258 pr_info("Duplicate phandle! %i used by %s and %s\n",
259 np->phandle, nh->np->full_name, np->full_name);
260 dup_count++;
261 break;
262 }
263 }
264
265 nh = kzalloc(sizeof(*nh), GFP_KERNEL);
266 if (WARN_ON(!nh))
267 return;
268
269 nh->np = np;
270 hash_add(phandle_ht, &nh->node, np->phandle);
271 phandle_count++;
272 }
273 unittest(dup_count == 0, "Found %i duplicates in %i phandles\n",
274 dup_count, phandle_count);
275
276 /* Clean up */
277 hash_for_each_safe(phandle_ht, i, tmp, nh, node) {
278 hash_del(&nh->node);
279 kfree(nh);
280 }
281 }
282
283 static void __init of_unittest_parse_phandle_with_args(void)
284 {
285 struct device_node *np;
286 struct of_phandle_args args;
287 int i, rc;
288
289 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
290 if (!np) {
291 pr_err("missing testcase data\n");
292 return;
293 }
294
295 rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
296 unittest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc);
297
298 for (i = 0; i < 8; i++) {
299 bool passed = true;
300
301 rc = of_parse_phandle_with_args(np, "phandle-list",
302 "#phandle-cells", i, &args);
303
304 /* Test the values from tests-phandle.dtsi */
305 switch (i) {
306 case 0:
307 passed &= !rc;
308 passed &= (args.args_count == 1);
309 passed &= (args.args[0] == (i + 1));
310 break;
311 case 1:
312 passed &= !rc;
313 passed &= (args.args_count == 2);
314 passed &= (args.args[0] == (i + 1));
315 passed &= (args.args[1] == 0);
316 break;
317 case 2:
318 passed &= (rc == -ENOENT);
319 break;
320 case 3:
321 passed &= !rc;
322 passed &= (args.args_count == 3);
323 passed &= (args.args[0] == (i + 1));
324 passed &= (args.args[1] == 4);
325 passed &= (args.args[2] == 3);
326 break;
327 case 4:
328 passed &= !rc;
329 passed &= (args.args_count == 2);
330 passed &= (args.args[0] == (i + 1));
331 passed &= (args.args[1] == 100);
332 break;
333 case 5:
334 passed &= !rc;
335 passed &= (args.args_count == 0);
336 break;
337 case 6:
338 passed &= !rc;
339 passed &= (args.args_count == 1);
340 passed &= (args.args[0] == (i + 1));
341 break;
342 case 7:
343 passed &= (rc == -ENOENT);
344 break;
345 default:
346 passed = false;
347 }
348
349 unittest(passed, "index %i - data error on node %s rc=%i\n",
350 i, args.np->full_name, rc);
351 }
352
353 /* Check for missing list property */
354 rc = of_parse_phandle_with_args(np, "phandle-list-missing",
355 "#phandle-cells", 0, &args);
356 unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
357 rc = of_count_phandle_with_args(np, "phandle-list-missing",
358 "#phandle-cells");
359 unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
360
361 /* Check for missing cells property */
362 rc = of_parse_phandle_with_args(np, "phandle-list",
363 "#phandle-cells-missing", 0, &args);
364 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
365 rc = of_count_phandle_with_args(np, "phandle-list",
366 "#phandle-cells-missing");
367 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
368
369 /* Check for bad phandle in list */
370 rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle",
371 "#phandle-cells", 0, &args);
372 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
373 rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle",
374 "#phandle-cells");
375 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
376
377 /* Check for incorrectly formed argument list */
378 rc = of_parse_phandle_with_args(np, "phandle-list-bad-args",
379 "#phandle-cells", 1, &args);
380 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
381 rc = of_count_phandle_with_args(np, "phandle-list-bad-args",
382 "#phandle-cells");
383 unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
384 }
385
386 static void __init of_unittest_property_string(void)
387 {
388 const char *strings[4];
389 struct device_node *np;
390 int rc;
391
392 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
393 if (!np) {
394 pr_err("No testcase data in device tree\n");
395 return;
396 }
397
398 rc = of_property_match_string(np, "phandle-list-names", "first");
399 unittest(rc == 0, "first expected:0 got:%i\n", rc);
400 rc = of_property_match_string(np, "phandle-list-names", "second");
401 unittest(rc == 1, "second expected:1 got:%i\n", rc);
402 rc = of_property_match_string(np, "phandle-list-names", "third");
403 unittest(rc == 2, "third expected:2 got:%i\n", rc);
404 rc = of_property_match_string(np, "phandle-list-names", "fourth");
405 unittest(rc == -ENODATA, "unmatched string; rc=%i\n", rc);
406 rc = of_property_match_string(np, "missing-property", "blah");
407 unittest(rc == -EINVAL, "missing property; rc=%i\n", rc);
408 rc = of_property_match_string(np, "empty-property", "blah");
409 unittest(rc == -ENODATA, "empty property; rc=%i\n", rc);
410 rc = of_property_match_string(np, "unterminated-string", "blah");
411 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
412
413 /* of_property_count_strings() tests */
414 rc = of_property_count_strings(np, "string-property");
415 unittest(rc == 1, "Incorrect string count; rc=%i\n", rc);
416 rc = of_property_count_strings(np, "phandle-list-names");
417 unittest(rc == 3, "Incorrect string count; rc=%i\n", rc);
418 rc = of_property_count_strings(np, "unterminated-string");
419 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
420 rc = of_property_count_strings(np, "unterminated-string-list");
421 unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
422
423 /* of_property_read_string_index() tests */
424 rc = of_property_read_string_index(np, "string-property", 0, strings);
425 unittest(rc == 0 && !strcmp(strings[0], "foobar"), "of_property_read_string_index() failure; rc=%i\n", rc);
426 strings[0] = NULL;
427 rc = of_property_read_string_index(np, "string-property", 1, strings);
428 unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
429 rc = of_property_read_string_index(np, "phandle-list-names", 0, strings);
430 unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
431 rc = of_property_read_string_index(np, "phandle-list-names", 1, strings);
432 unittest(rc == 0 && !strcmp(strings[0], "second"), "of_property_read_string_index() failure; rc=%i\n", rc);
433 rc = of_property_read_string_index(np, "phandle-list-names", 2, strings);
434 unittest(rc == 0 && !strcmp(strings[0], "third"), "of_property_read_string_index() failure; rc=%i\n", rc);
435 strings[0] = NULL;
436 rc = of_property_read_string_index(np, "phandle-list-names", 3, strings);
437 unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
438 strings[0] = NULL;
439 rc = of_property_read_string_index(np, "unterminated-string", 0, strings);
440 unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
441 rc = of_property_read_string_index(np, "unterminated-string-list", 0, strings);
442 unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
443 strings[0] = NULL;
444 rc = of_property_read_string_index(np, "unterminated-string-list", 2, strings); /* should fail */
445 unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
446 strings[1] = NULL;
447
448 /* of_property_read_string_array() tests */
449 rc = of_property_read_string_array(np, "string-property", strings, 4);
450 unittest(rc == 1, "Incorrect string count; rc=%i\n", rc);
451 rc = of_property_read_string_array(np, "phandle-list-names", strings, 4);
452 unittest(rc == 3, "Incorrect string count; rc=%i\n", rc);
453 rc = of_property_read_string_array(np, "unterminated-string", strings, 4);
454 unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
455 /* -- An incorrectly formed string should cause a failure */
456 rc = of_property_read_string_array(np, "unterminated-string-list", strings, 4);
457 unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
458 /* -- parsing the correctly formed strings should still work: */
459 strings[2] = NULL;
460 rc = of_property_read_string_array(np, "unterminated-string-list", strings, 2);
461 unittest(rc == 2 && strings[2] == NULL, "of_property_read_string_array() failure; rc=%i\n", rc);
462 strings[1] = NULL;
463 rc = of_property_read_string_array(np, "phandle-list-names", strings, 1);
464 unittest(rc == 1 && strings[1] == NULL, "Overwrote end of string array; rc=%i, str='%s'\n", rc, strings[1]);
465 }
466
467 #define propcmp(p1, p2) (((p1)->length == (p2)->length) && \
468 (p1)->value && (p2)->value && \
469 !memcmp((p1)->value, (p2)->value, (p1)->length) && \
470 !strcmp((p1)->name, (p2)->name))
471 static void __init of_unittest_property_copy(void)
472 {
473 #ifdef CONFIG_OF_DYNAMIC
474 struct property p1 = { .name = "p1", .length = 0, .value = "" };
475 struct property p2 = { .name = "p2", .length = 5, .value = "abcd" };
476 struct property *new;
477
478 new = __of_prop_dup(&p1, GFP_KERNEL);
479 unittest(new && propcmp(&p1, new), "empty property didn't copy correctly\n");
480 kfree(new->value);
481 kfree(new->name);
482 kfree(new);
483
484 new = __of_prop_dup(&p2, GFP_KERNEL);
485 unittest(new && propcmp(&p2, new), "non-empty property didn't copy correctly\n");
486 kfree(new->value);
487 kfree(new->name);
488 kfree(new);
489 #endif
490 }
491
492 static void __init of_unittest_changeset(void)
493 {
494 #ifdef CONFIG_OF_DYNAMIC
495 struct property *ppadd, padd = { .name = "prop-add", .length = 0, .value = "" };
496 struct property *ppupdate, pupdate = { .name = "prop-update", .length = 5, .value = "abcd" };
497 struct property *ppremove;
498 struct device_node *n1, *n2, *n21, *nremove, *parent, *np;
499 struct of_changeset chgset;
500
501 n1 = __of_node_dup(NULL, "/testcase-data/changeset/n1");
502 unittest(n1, "testcase setup failure\n");
503 n2 = __of_node_dup(NULL, "/testcase-data/changeset/n2");
504 unittest(n2, "testcase setup failure\n");
505 n21 = __of_node_dup(NULL, "%s/%s", "/testcase-data/changeset/n2", "n21");
506 unittest(n21, "testcase setup failure %p\n", n21);
507 nremove = of_find_node_by_path("/testcase-data/changeset/node-remove");
508 unittest(nremove, "testcase setup failure\n");
509 ppadd = __of_prop_dup(&padd, GFP_KERNEL);
510 unittest(ppadd, "testcase setup failure\n");
511 ppupdate = __of_prop_dup(&pupdate, GFP_KERNEL);
512 unittest(ppupdate, "testcase setup failure\n");
513 parent = nremove->parent;
514 n1->parent = parent;
515 n2->parent = parent;
516 n21->parent = n2;
517 n2->child = n21;
518 ppremove = of_find_property(parent, "prop-remove", NULL);
519 unittest(ppremove, "failed to find removal prop");
520
521 of_changeset_init(&chgset);
522 unittest(!of_changeset_attach_node(&chgset, n1), "fail attach n1\n");
523 unittest(!of_changeset_attach_node(&chgset, n2), "fail attach n2\n");
524 unittest(!of_changeset_detach_node(&chgset, nremove), "fail remove node\n");
525 unittest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n");
526 unittest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop\n");
527 unittest(!of_changeset_update_property(&chgset, parent, ppupdate), "fail update prop\n");
528 unittest(!of_changeset_remove_property(&chgset, parent, ppremove), "fail remove prop\n");
529 mutex_lock(&of_mutex);
530 unittest(!of_changeset_apply(&chgset), "apply failed\n");
531 mutex_unlock(&of_mutex);
532
533 /* Make sure node names are constructed correctly */
534 unittest((np = of_find_node_by_path("/testcase-data/changeset/n2/n21")),
535 "'%s' not added\n", n21->full_name);
536 of_node_put(np);
537
538 mutex_lock(&of_mutex);
539 unittest(!of_changeset_revert(&chgset), "revert failed\n");
540 mutex_unlock(&of_mutex);
541
542 of_changeset_destroy(&chgset);
543 #endif
544 }
545
546 static 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 /* Test the values from tests-phandle.dtsi */
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
620 static 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 /* Test the values from tests-phandle.dtsi */
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
690 static const struct of_device_id match_node_table[] = {
691 { .data = "A", .name = "name0", }, /* Name alone is lowest priority */
692 { .data = "B", .type = "type1", }, /* followed by type alone */
693
694 { .data = "Ca", .name = "name2", .type = "type1", }, /* followed by both together */
695 { .data = "Cb", .name = "name2", }, /* Only match when type doesn't match */
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
707 static 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
725 static 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
756 static const struct platform_device_info test_bus_info = {
757 .name = "unittest-bus",
758 };
759 static void __init of_unittest_platform_populate(void)
760 {
761 int irq, rc;
762 struct device_node *np, *child, *grandchild;
763 struct platform_device *pdev, *test_bus;
764 const struct of_device_id match[] = {
765 { .compatible = "test-device", },
766 {}
767 };
768
769 np = of_find_node_by_path("/testcase-data");
770 of_platform_populate(np, of_default_bus_match_table, NULL, NULL);
771
772 /* Test that a missing irq domain returns -EPROBE_DEFER */
773 np = of_find_node_by_path("/testcase-data/testcase-device1");
774 pdev = of_find_device_by_node(np);
775 unittest(pdev, "device 1 creation failed\n");
776
777 irq = platform_get_irq(pdev, 0);
778 unittest(irq == -EPROBE_DEFER, "device deferred probe failed - %d\n", irq);
779
780 /* Test that a parsing failure does not return -EPROBE_DEFER */
781 np = of_find_node_by_path("/testcase-data/testcase-device2");
782 pdev = of_find_device_by_node(np);
783 unittest(pdev, "device 2 creation failed\n");
784 irq = platform_get_irq(pdev, 0);
785 unittest(irq < 0 && irq != -EPROBE_DEFER, "device parsing error failed - %d\n", irq);
786
787 np = of_find_node_by_path("/testcase-data/platform-tests");
788 unittest(np, "No testcase data in device tree\n");
789 if (!np)
790 return;
791
792 test_bus = platform_device_register_full(&test_bus_info);
793 rc = PTR_ERR_OR_ZERO(test_bus);
794 unittest(!rc, "testbus registration failed; rc=%i\n", rc);
795 if (rc)
796 return;
797 test_bus->dev.of_node = np;
798
799 of_platform_populate(np, match, NULL, &test_bus->dev);
800 for_each_child_of_node(np, child) {
801 for_each_child_of_node(child, grandchild)
802 unittest(of_find_device_by_node(grandchild),
803 "Could not create device for node '%s'\n",
804 grandchild->name);
805 }
806
807 of_platform_depopulate(&test_bus->dev);
808 for_each_child_of_node(np, child) {
809 for_each_child_of_node(child, grandchild)
810 unittest(!of_find_device_by_node(grandchild),
811 "device didn't get destroyed '%s'\n",
812 grandchild->name);
813 }
814
815 platform_device_unregister(test_bus);
816 of_node_put(np);
817 }
818
819 /**
820 * update_node_properties - adds the properties
821 * of np into dup node (present in live tree) and
822 * updates parent of children of np to dup.
823 *
824 * @np: node already present in live tree
825 * @dup: node present in live tree to be updated
826 */
827 static void update_node_properties(struct device_node *np,
828 struct device_node *dup)
829 {
830 struct property *prop;
831 struct device_node *child;
832
833 for_each_property_of_node(np, prop)
834 of_add_property(dup, prop);
835
836 for_each_child_of_node(np, child)
837 child->parent = dup;
838 }
839
840 /**
841 * attach_node_and_children - attaches nodes
842 * and its children to live tree
843 *
844 * @np: Node to attach to live tree
845 */
846 static int attach_node_and_children(struct device_node *np)
847 {
848 struct device_node *next, *dup, *child;
849 unsigned long flags;
850
851 dup = of_find_node_by_path(np->full_name);
852 if (dup) {
853 update_node_properties(np, dup);
854 return 0;
855 }
856
857 child = np->child;
858 np->child = NULL;
859
860 mutex_lock(&of_mutex);
861 raw_spin_lock_irqsave(&devtree_lock, flags);
862 np->sibling = np->parent->child;
863 np->parent->child = np;
864 of_node_clear_flag(np, OF_DETACHED);
865 raw_spin_unlock_irqrestore(&devtree_lock, flags);
866
867 __of_attach_node_sysfs(np);
868 mutex_unlock(&of_mutex);
869
870 while (child) {
871 next = child->sibling;
872 attach_node_and_children(child);
873 child = next;
874 }
875
876 return 0;
877 }
878
879 /**
880 * unittest_data_add - Reads, copies data from
881 * linked tree and attaches it to the live tree
882 */
883 static int __init unittest_data_add(void)
884 {
885 void *unittest_data;
886 struct device_node *unittest_data_node, *np;
887 /*
888 * __dtb_testcases_begin[] and __dtb_testcases_end[] are magically
889 * created by cmd_dt_S_dtb in scripts/Makefile.lib
890 */
891 extern uint8_t __dtb_testcases_begin[];
892 extern uint8_t __dtb_testcases_end[];
893 const int size = __dtb_testcases_end - __dtb_testcases_begin;
894 int rc;
895
896 if (!size) {
897 pr_warn("%s: No testcase data to attach; not running tests\n",
898 __func__);
899 return -ENODATA;
900 }
901
902 /* creating copy */
903 unittest_data = kmemdup(__dtb_testcases_begin, size, GFP_KERNEL);
904
905 if (!unittest_data) {
906 pr_warn("%s: Failed to allocate memory for unittest_data; "
907 "not running tests\n", __func__);
908 return -ENOMEM;
909 }
910 of_fdt_unflatten_tree(unittest_data, &unittest_data_node);
911 if (!unittest_data_node) {
912 pr_warn("%s: No tree to attach; not running tests\n", __func__);
913 return -ENODATA;
914 }
915 of_node_set_flag(unittest_data_node, OF_DETACHED);
916 rc = of_resolve_phandles(unittest_data_node);
917 if (rc) {
918 pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__, rc);
919 return -EINVAL;
920 }
921
922 if (!of_root) {
923 of_root = unittest_data_node;
924 for_each_of_allnodes(np)
925 __of_attach_node_sysfs(np);
926 of_aliases = of_find_node_by_path("/aliases");
927 of_chosen = of_find_node_by_path("/chosen");
928 return 0;
929 }
930
931 /* attach the sub-tree to live tree */
932 np = unittest_data_node->child;
933 while (np) {
934 struct device_node *next = np->sibling;
935
936 np->parent = of_root;
937 attach_node_and_children(np);
938 np = next;
939 }
940 return 0;
941 }
942
943 #ifdef CONFIG_OF_OVERLAY
944
945 static int unittest_probe(struct platform_device *pdev)
946 {
947 struct device *dev = &pdev->dev;
948 struct device_node *np = dev->of_node;
949
950 if (np == NULL) {
951 dev_err(dev, "No OF data for device\n");
952 return -EINVAL;
953
954 }
955
956 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
957
958 of_platform_populate(np, NULL, NULL, &pdev->dev);
959
960 return 0;
961 }
962
963 static int unittest_remove(struct platform_device *pdev)
964 {
965 struct device *dev = &pdev->dev;
966 struct device_node *np = dev->of_node;
967
968 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
969 return 0;
970 }
971
972 static const struct of_device_id unittest_match[] = {
973 { .compatible = "unittest", },
974 {},
975 };
976
977 static struct platform_driver unittest_driver = {
978 .probe = unittest_probe,
979 .remove = unittest_remove,
980 .driver = {
981 .name = "unittest",
982 .of_match_table = of_match_ptr(unittest_match),
983 },
984 };
985
986 /* get the platform device instantiated at the path */
987 static struct platform_device *of_path_to_platform_device(const char *path)
988 {
989 struct device_node *np;
990 struct platform_device *pdev;
991
992 np = of_find_node_by_path(path);
993 if (np == NULL)
994 return NULL;
995
996 pdev = of_find_device_by_node(np);
997 of_node_put(np);
998
999 return pdev;
1000 }
1001
1002 /* find out if a platform device exists at that path */
1003 static int of_path_platform_device_exists(const char *path)
1004 {
1005 struct platform_device *pdev;
1006
1007 pdev = of_path_to_platform_device(path);
1008 platform_device_put(pdev);
1009 return pdev != NULL;
1010 }
1011
1012 #if IS_BUILTIN(CONFIG_I2C)
1013
1014 /* get the i2c client device instantiated at the path */
1015 static struct i2c_client *of_path_to_i2c_client(const char *path)
1016 {
1017 struct device_node *np;
1018 struct i2c_client *client;
1019
1020 np = of_find_node_by_path(path);
1021 if (np == NULL)
1022 return NULL;
1023
1024 client = of_find_i2c_device_by_node(np);
1025 of_node_put(np);
1026
1027 return client;
1028 }
1029
1030 /* find out if a i2c client device exists at that path */
1031 static int of_path_i2c_client_exists(const char *path)
1032 {
1033 struct i2c_client *client;
1034
1035 client = of_path_to_i2c_client(path);
1036 if (client)
1037 put_device(&client->dev);
1038 return client != NULL;
1039 }
1040 #else
1041 static int of_path_i2c_client_exists(const char *path)
1042 {
1043 return 0;
1044 }
1045 #endif
1046
1047 enum overlay_type {
1048 PDEV_OVERLAY,
1049 I2C_OVERLAY
1050 };
1051
1052 static int of_path_device_type_exists(const char *path,
1053 enum overlay_type ovtype)
1054 {
1055 switch (ovtype) {
1056 case PDEV_OVERLAY:
1057 return of_path_platform_device_exists(path);
1058 case I2C_OVERLAY:
1059 return of_path_i2c_client_exists(path);
1060 }
1061 return 0;
1062 }
1063
1064 static const char *unittest_path(int nr, enum overlay_type ovtype)
1065 {
1066 const char *base;
1067 static char buf[256];
1068
1069 switch (ovtype) {
1070 case PDEV_OVERLAY:
1071 base = "/testcase-data/overlay-node/test-bus";
1072 break;
1073 case I2C_OVERLAY:
1074 base = "/testcase-data/overlay-node/test-bus/i2c-test-bus";
1075 break;
1076 default:
1077 buf[0] = '\0';
1078 return buf;
1079 }
1080 snprintf(buf, sizeof(buf) - 1, "%s/test-unittest%d", base, nr);
1081 buf[sizeof(buf) - 1] = '\0';
1082 return buf;
1083 }
1084
1085 static int of_unittest_device_exists(int unittest_nr, enum overlay_type ovtype)
1086 {
1087 const char *path;
1088
1089 path = unittest_path(unittest_nr, ovtype);
1090
1091 switch (ovtype) {
1092 case PDEV_OVERLAY:
1093 return of_path_platform_device_exists(path);
1094 case I2C_OVERLAY:
1095 return of_path_i2c_client_exists(path);
1096 }
1097 return 0;
1098 }
1099
1100 static const char *overlay_path(int nr)
1101 {
1102 static char buf[256];
1103
1104 snprintf(buf, sizeof(buf) - 1,
1105 "/testcase-data/overlay%d", nr);
1106 buf[sizeof(buf) - 1] = '\0';
1107
1108 return buf;
1109 }
1110
1111 static const char *bus_path = "/testcase-data/overlay-node/test-bus";
1112
1113 /* it is guaranteed that overlay ids are assigned in sequence */
1114 #define MAX_UNITTEST_OVERLAYS 256
1115 static unsigned long overlay_id_bits[BITS_TO_LONGS(MAX_UNITTEST_OVERLAYS)];
1116 static int overlay_first_id = -1;
1117
1118 static void of_unittest_track_overlay(int id)
1119 {
1120 if (overlay_first_id < 0)
1121 overlay_first_id = id;
1122 id -= overlay_first_id;
1123
1124 /* we shouldn't need that many */
1125 BUG_ON(id >= MAX_UNITTEST_OVERLAYS);
1126 overlay_id_bits[BIT_WORD(id)] |= BIT_MASK(id);
1127 }
1128
1129 static void of_unittest_untrack_overlay(int id)
1130 {
1131 if (overlay_first_id < 0)
1132 return;
1133 id -= overlay_first_id;
1134 BUG_ON(id >= MAX_UNITTEST_OVERLAYS);
1135 overlay_id_bits[BIT_WORD(id)] &= ~BIT_MASK(id);
1136 }
1137
1138 static void of_unittest_destroy_tracked_overlays(void)
1139 {
1140 int id, ret, defers;
1141
1142 if (overlay_first_id < 0)
1143 return;
1144
1145 /* try until no defers */
1146 do {
1147 defers = 0;
1148 /* remove in reverse order */
1149 for (id = MAX_UNITTEST_OVERLAYS - 1; id >= 0; id--) {
1150 if (!(overlay_id_bits[BIT_WORD(id)] & BIT_MASK(id)))
1151 continue;
1152
1153 ret = of_overlay_destroy(id + overlay_first_id);
1154 if (ret != 0) {
1155 defers++;
1156 pr_warn("%s: overlay destroy failed for #%d\n",
1157 __func__, id + overlay_first_id);
1158 continue;
1159 }
1160
1161 overlay_id_bits[BIT_WORD(id)] &= ~BIT_MASK(id);
1162 }
1163 } while (defers > 0);
1164 }
1165
1166 static int of_unittest_apply_overlay(int unittest_nr, int overlay_nr,
1167 int *overlay_id)
1168 {
1169 struct device_node *np = NULL;
1170 int ret, id = -1;
1171
1172 np = of_find_node_by_path(overlay_path(overlay_nr));
1173 if (np == NULL) {
1174 unittest(0, "could not find overlay node @\"%s\"\n",
1175 overlay_path(overlay_nr));
1176 ret = -EINVAL;
1177 goto out;
1178 }
1179
1180 ret = of_overlay_create(np);
1181 if (ret < 0) {
1182 unittest(0, "could not create overlay from \"%s\"\n",
1183 overlay_path(overlay_nr));
1184 goto out;
1185 }
1186 id = ret;
1187 of_unittest_track_overlay(id);
1188
1189 ret = 0;
1190
1191 out:
1192 of_node_put(np);
1193
1194 if (overlay_id)
1195 *overlay_id = id;
1196
1197 return ret;
1198 }
1199
1200 /* apply an overlay while checking before and after states */
1201 static int of_unittest_apply_overlay_check(int overlay_nr, int unittest_nr,
1202 int before, int after, enum overlay_type ovtype)
1203 {
1204 int ret;
1205
1206 /* unittest device must not be in before state */
1207 if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
1208 unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1209 overlay_path(overlay_nr),
1210 unittest_path(unittest_nr, ovtype),
1211 !before ? "enabled" : "disabled");
1212 return -EINVAL;
1213 }
1214
1215 ret = of_unittest_apply_overlay(overlay_nr, unittest_nr, NULL);
1216 if (ret != 0) {
1217 /* of_unittest_apply_overlay already called unittest() */
1218 return ret;
1219 }
1220
1221 /* unittest device must be to set to after state */
1222 if (of_unittest_device_exists(unittest_nr, ovtype) != after) {
1223 unittest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n",
1224 overlay_path(overlay_nr),
1225 unittest_path(unittest_nr, ovtype),
1226 !after ? "enabled" : "disabled");
1227 return -EINVAL;
1228 }
1229
1230 return 0;
1231 }
1232
1233 /* apply an overlay and then revert it while checking before, after states */
1234 static int of_unittest_apply_revert_overlay_check(int overlay_nr,
1235 int unittest_nr, int before, int after,
1236 enum overlay_type ovtype)
1237 {
1238 int ret, ov_id;
1239
1240 /* unittest device must be in before state */
1241 if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
1242 unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1243 overlay_path(overlay_nr),
1244 unittest_path(unittest_nr, ovtype),
1245 !before ? "enabled" : "disabled");
1246 return -EINVAL;
1247 }
1248
1249 /* apply the overlay */
1250 ret = of_unittest_apply_overlay(overlay_nr, unittest_nr, &ov_id);
1251 if (ret != 0) {
1252 /* of_unittest_apply_overlay already called unittest() */
1253 return ret;
1254 }
1255
1256 /* unittest device must be in after state */
1257 if (of_unittest_device_exists(unittest_nr, ovtype) != after) {
1258 unittest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n",
1259 overlay_path(overlay_nr),
1260 unittest_path(unittest_nr, ovtype),
1261 !after ? "enabled" : "disabled");
1262 return -EINVAL;
1263 }
1264
1265 ret = of_overlay_destroy(ov_id);
1266 if (ret != 0) {
1267 unittest(0, "overlay @\"%s\" failed to be destroyed @\"%s\"\n",
1268 overlay_path(overlay_nr),
1269 unittest_path(unittest_nr, ovtype));
1270 return ret;
1271 }
1272
1273 /* unittest device must be again in before state */
1274 if (of_unittest_device_exists(unittest_nr, PDEV_OVERLAY) != before) {
1275 unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1276 overlay_path(overlay_nr),
1277 unittest_path(unittest_nr, ovtype),
1278 !before ? "enabled" : "disabled");
1279 return -EINVAL;
1280 }
1281
1282 return 0;
1283 }
1284
1285 /* test activation of device */
1286 static void of_unittest_overlay_0(void)
1287 {
1288 int ret;
1289
1290 /* device should enable */
1291 ret = of_unittest_apply_overlay_check(0, 0, 0, 1, PDEV_OVERLAY);
1292 if (ret != 0)
1293 return;
1294
1295 unittest(1, "overlay test %d passed\n", 0);
1296 }
1297
1298 /* test deactivation of device */
1299 static void of_unittest_overlay_1(void)
1300 {
1301 int ret;
1302
1303 /* device should disable */
1304 ret = of_unittest_apply_overlay_check(1, 1, 1, 0, PDEV_OVERLAY);
1305 if (ret != 0)
1306 return;
1307
1308 unittest(1, "overlay test %d passed\n", 1);
1309 }
1310
1311 /* test activation of device */
1312 static void of_unittest_overlay_2(void)
1313 {
1314 int ret;
1315
1316 /* device should enable */
1317 ret = of_unittest_apply_overlay_check(2, 2, 0, 1, PDEV_OVERLAY);
1318 if (ret != 0)
1319 return;
1320
1321 unittest(1, "overlay test %d passed\n", 2);
1322 }
1323
1324 /* test deactivation of device */
1325 static void of_unittest_overlay_3(void)
1326 {
1327 int ret;
1328
1329 /* device should disable */
1330 ret = of_unittest_apply_overlay_check(3, 3, 1, 0, PDEV_OVERLAY);
1331 if (ret != 0)
1332 return;
1333
1334 unittest(1, "overlay test %d passed\n", 3);
1335 }
1336
1337 /* test activation of a full device node */
1338 static void of_unittest_overlay_4(void)
1339 {
1340 int ret;
1341
1342 /* device should disable */
1343 ret = of_unittest_apply_overlay_check(4, 4, 0, 1, PDEV_OVERLAY);
1344 if (ret != 0)
1345 return;
1346
1347 unittest(1, "overlay test %d passed\n", 4);
1348 }
1349
1350 /* test overlay apply/revert sequence */
1351 static void of_unittest_overlay_5(void)
1352 {
1353 int ret;
1354
1355 /* device should disable */
1356 ret = of_unittest_apply_revert_overlay_check(5, 5, 0, 1, PDEV_OVERLAY);
1357 if (ret != 0)
1358 return;
1359
1360 unittest(1, "overlay test %d passed\n", 5);
1361 }
1362
1363 /* test overlay application in sequence */
1364 static void of_unittest_overlay_6(void)
1365 {
1366 struct device_node *np;
1367 int ret, i, ov_id[2];
1368 int overlay_nr = 6, unittest_nr = 6;
1369 int before = 0, after = 1;
1370
1371 /* unittest device must be in before state */
1372 for (i = 0; i < 2; i++) {
1373 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
1374 != before) {
1375 unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1376 overlay_path(overlay_nr + i),
1377 unittest_path(unittest_nr + i,
1378 PDEV_OVERLAY),
1379 !before ? "enabled" : "disabled");
1380 return;
1381 }
1382 }
1383
1384 /* apply the overlays */
1385 for (i = 0; i < 2; i++) {
1386
1387 np = of_find_node_by_path(overlay_path(overlay_nr + i));
1388 if (np == NULL) {
1389 unittest(0, "could not find overlay node @\"%s\"\n",
1390 overlay_path(overlay_nr + i));
1391 return;
1392 }
1393
1394 ret = of_overlay_create(np);
1395 if (ret < 0) {
1396 unittest(0, "could not create overlay from \"%s\"\n",
1397 overlay_path(overlay_nr + i));
1398 return;
1399 }
1400 ov_id[i] = ret;
1401 of_unittest_track_overlay(ov_id[i]);
1402 }
1403
1404 for (i = 0; i < 2; i++) {
1405 /* unittest device must be in after state */
1406 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
1407 != after) {
1408 unittest(0, "overlay @\"%s\" failed @\"%s\" %s\n",
1409 overlay_path(overlay_nr + i),
1410 unittest_path(unittest_nr + i,
1411 PDEV_OVERLAY),
1412 !after ? "enabled" : "disabled");
1413 return;
1414 }
1415 }
1416
1417 for (i = 1; i >= 0; i--) {
1418 ret = of_overlay_destroy(ov_id[i]);
1419 if (ret != 0) {
1420 unittest(0, "overlay @\"%s\" failed destroy @\"%s\"\n",
1421 overlay_path(overlay_nr + i),
1422 unittest_path(unittest_nr + i,
1423 PDEV_OVERLAY));
1424 return;
1425 }
1426 of_unittest_untrack_overlay(ov_id[i]);
1427 }
1428
1429 for (i = 0; i < 2; i++) {
1430 /* unittest device must be again in before state */
1431 if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
1432 != before) {
1433 unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1434 overlay_path(overlay_nr + i),
1435 unittest_path(unittest_nr + i,
1436 PDEV_OVERLAY),
1437 !before ? "enabled" : "disabled");
1438 return;
1439 }
1440 }
1441
1442 unittest(1, "overlay test %d passed\n", 6);
1443 }
1444
1445 /* test overlay application in sequence */
1446 static void of_unittest_overlay_8(void)
1447 {
1448 struct device_node *np;
1449 int ret, i, ov_id[2];
1450 int overlay_nr = 8, unittest_nr = 8;
1451
1452 /* we don't care about device state in this test */
1453
1454 /* apply the overlays */
1455 for (i = 0; i < 2; i++) {
1456
1457 np = of_find_node_by_path(overlay_path(overlay_nr + i));
1458 if (np == NULL) {
1459 unittest(0, "could not find overlay node @\"%s\"\n",
1460 overlay_path(overlay_nr + i));
1461 return;
1462 }
1463
1464 ret = of_overlay_create(np);
1465 if (ret < 0) {
1466 unittest(0, "could not create overlay from \"%s\"\n",
1467 overlay_path(overlay_nr + i));
1468 return;
1469 }
1470 ov_id[i] = ret;
1471 of_unittest_track_overlay(ov_id[i]);
1472 }
1473
1474 /* now try to remove first overlay (it should fail) */
1475 ret = of_overlay_destroy(ov_id[0]);
1476 if (ret == 0) {
1477 unittest(0, "overlay @\"%s\" was destroyed @\"%s\"\n",
1478 overlay_path(overlay_nr + 0),
1479 unittest_path(unittest_nr,
1480 PDEV_OVERLAY));
1481 return;
1482 }
1483
1484 /* removing them in order should work */
1485 for (i = 1; i >= 0; i--) {
1486 ret = of_overlay_destroy(ov_id[i]);
1487 if (ret != 0) {
1488 unittest(0, "overlay @\"%s\" not destroyed @\"%s\"\n",
1489 overlay_path(overlay_nr + i),
1490 unittest_path(unittest_nr,
1491 PDEV_OVERLAY));
1492 return;
1493 }
1494 of_unittest_untrack_overlay(ov_id[i]);
1495 }
1496
1497 unittest(1, "overlay test %d passed\n", 8);
1498 }
1499
1500 /* test insertion of a bus with parent devices */
1501 static void of_unittest_overlay_10(void)
1502 {
1503 int ret;
1504 char *child_path;
1505
1506 /* device should disable */
1507 ret = of_unittest_apply_overlay_check(10, 10, 0, 1, PDEV_OVERLAY);
1508 if (unittest(ret == 0,
1509 "overlay test %d failed; overlay application\n", 10))
1510 return;
1511
1512 child_path = kasprintf(GFP_KERNEL, "%s/test-unittest101",
1513 unittest_path(10, PDEV_OVERLAY));
1514 if (unittest(child_path, "overlay test %d failed; kasprintf\n", 10))
1515 return;
1516
1517 ret = of_path_device_type_exists(child_path, PDEV_OVERLAY);
1518 kfree(child_path);
1519 if (unittest(ret, "overlay test %d failed; no child device\n", 10))
1520 return;
1521 }
1522
1523 /* test insertion of a bus with parent devices (and revert) */
1524 static void of_unittest_overlay_11(void)
1525 {
1526 int ret;
1527
1528 /* device should disable */
1529 ret = of_unittest_apply_revert_overlay_check(11, 11, 0, 1,
1530 PDEV_OVERLAY);
1531 if (unittest(ret == 0,
1532 "overlay test %d failed; overlay application\n", 11))
1533 return;
1534 }
1535
1536 #if IS_BUILTIN(CONFIG_I2C) && IS_ENABLED(CONFIG_OF_OVERLAY)
1537
1538 struct unittest_i2c_bus_data {
1539 struct platform_device *pdev;
1540 struct i2c_adapter adap;
1541 };
1542
1543 static int unittest_i2c_master_xfer(struct i2c_adapter *adap,
1544 struct i2c_msg *msgs, int num)
1545 {
1546 struct unittest_i2c_bus_data *std = i2c_get_adapdata(adap);
1547
1548 (void)std;
1549
1550 return num;
1551 }
1552
1553 static u32 unittest_i2c_functionality(struct i2c_adapter *adap)
1554 {
1555 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
1556 }
1557
1558 static const struct i2c_algorithm unittest_i2c_algo = {
1559 .master_xfer = unittest_i2c_master_xfer,
1560 .functionality = unittest_i2c_functionality,
1561 };
1562
1563 static int unittest_i2c_bus_probe(struct platform_device *pdev)
1564 {
1565 struct device *dev = &pdev->dev;
1566 struct device_node *np = dev->of_node;
1567 struct unittest_i2c_bus_data *std;
1568 struct i2c_adapter *adap;
1569 int ret;
1570
1571 if (np == NULL) {
1572 dev_err(dev, "No OF data for device\n");
1573 return -EINVAL;
1574
1575 }
1576
1577 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1578
1579 std = devm_kzalloc(dev, sizeof(*std), GFP_KERNEL);
1580 if (!std) {
1581 dev_err(dev, "Failed to allocate unittest i2c data\n");
1582 return -ENOMEM;
1583 }
1584
1585 /* link them together */
1586 std->pdev = pdev;
1587 platform_set_drvdata(pdev, std);
1588
1589 adap = &std->adap;
1590 i2c_set_adapdata(adap, std);
1591 adap->nr = -1;
1592 strlcpy(adap->name, pdev->name, sizeof(adap->name));
1593 adap->class = I2C_CLASS_DEPRECATED;
1594 adap->algo = &unittest_i2c_algo;
1595 adap->dev.parent = dev;
1596 adap->dev.of_node = dev->of_node;
1597 adap->timeout = 5 * HZ;
1598 adap->retries = 3;
1599
1600 ret = i2c_add_numbered_adapter(adap);
1601 if (ret != 0) {
1602 dev_err(dev, "Failed to add I2C adapter\n");
1603 return ret;
1604 }
1605
1606 return 0;
1607 }
1608
1609 static int unittest_i2c_bus_remove(struct platform_device *pdev)
1610 {
1611 struct device *dev = &pdev->dev;
1612 struct device_node *np = dev->of_node;
1613 struct unittest_i2c_bus_data *std = platform_get_drvdata(pdev);
1614
1615 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1616 i2c_del_adapter(&std->adap);
1617
1618 return 0;
1619 }
1620
1621 static const struct of_device_id unittest_i2c_bus_match[] = {
1622 { .compatible = "unittest-i2c-bus", },
1623 {},
1624 };
1625
1626 static struct platform_driver unittest_i2c_bus_driver = {
1627 .probe = unittest_i2c_bus_probe,
1628 .remove = unittest_i2c_bus_remove,
1629 .driver = {
1630 .name = "unittest-i2c-bus",
1631 .of_match_table = of_match_ptr(unittest_i2c_bus_match),
1632 },
1633 };
1634
1635 static int unittest_i2c_dev_probe(struct i2c_client *client,
1636 const struct i2c_device_id *id)
1637 {
1638 struct device *dev = &client->dev;
1639 struct device_node *np = client->dev.of_node;
1640
1641 if (!np) {
1642 dev_err(dev, "No OF node\n");
1643 return -EINVAL;
1644 }
1645
1646 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1647
1648 return 0;
1649 };
1650
1651 static int unittest_i2c_dev_remove(struct i2c_client *client)
1652 {
1653 struct device *dev = &client->dev;
1654 struct device_node *np = client->dev.of_node;
1655
1656 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1657 return 0;
1658 }
1659
1660 static const struct i2c_device_id unittest_i2c_dev_id[] = {
1661 { .name = "unittest-i2c-dev" },
1662 { }
1663 };
1664
1665 static struct i2c_driver unittest_i2c_dev_driver = {
1666 .driver = {
1667 .name = "unittest-i2c-dev",
1668 },
1669 .probe = unittest_i2c_dev_probe,
1670 .remove = unittest_i2c_dev_remove,
1671 .id_table = unittest_i2c_dev_id,
1672 };
1673
1674 #if IS_BUILTIN(CONFIG_I2C_MUX)
1675
1676 struct unittest_i2c_mux_data {
1677 int nchans;
1678 struct i2c_adapter *adap[];
1679 };
1680
1681 static int unittest_i2c_mux_select_chan(struct i2c_adapter *adap,
1682 void *client, u32 chan)
1683 {
1684 return 0;
1685 }
1686
1687 static int unittest_i2c_mux_probe(struct i2c_client *client,
1688 const struct i2c_device_id *id)
1689 {
1690 int ret, i, nchans, size;
1691 struct device *dev = &client->dev;
1692 struct i2c_adapter *adap = to_i2c_adapter(dev->parent);
1693 struct device_node *np = client->dev.of_node, *child;
1694 struct unittest_i2c_mux_data *stm;
1695 u32 reg, max_reg;
1696
1697 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1698
1699 if (!np) {
1700 dev_err(dev, "No OF node\n");
1701 return -EINVAL;
1702 }
1703
1704 max_reg = (u32)-1;
1705 for_each_child_of_node(np, child) {
1706 ret = of_property_read_u32(child, "reg", &reg);
1707 if (ret)
1708 continue;
1709 if (max_reg == (u32)-1 || reg > max_reg)
1710 max_reg = reg;
1711 }
1712 nchans = max_reg == (u32)-1 ? 0 : max_reg + 1;
1713 if (nchans == 0) {
1714 dev_err(dev, "No channels\n");
1715 return -EINVAL;
1716 }
1717
1718 size = offsetof(struct unittest_i2c_mux_data, adap[nchans]);
1719 stm = devm_kzalloc(dev, size, GFP_KERNEL);
1720 if (!stm) {
1721 dev_err(dev, "Out of memory\n");
1722 return -ENOMEM;
1723 }
1724 stm->nchans = nchans;
1725 for (i = 0; i < nchans; i++) {
1726 stm->adap[i] = i2c_add_mux_adapter(adap, dev, client,
1727 0, i, 0, unittest_i2c_mux_select_chan, NULL);
1728 if (!stm->adap[i]) {
1729 dev_err(dev, "Failed to register mux #%d\n", i);
1730 for (i--; i >= 0; i--)
1731 i2c_del_mux_adapter(stm->adap[i]);
1732 return -ENODEV;
1733 }
1734 }
1735
1736 i2c_set_clientdata(client, stm);
1737
1738 return 0;
1739 };
1740
1741 static int unittest_i2c_mux_remove(struct i2c_client *client)
1742 {
1743 struct device *dev = &client->dev;
1744 struct device_node *np = client->dev.of_node;
1745 struct unittest_i2c_mux_data *stm = i2c_get_clientdata(client);
1746 int i;
1747
1748 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1749 for (i = stm->nchans - 1; i >= 0; i--)
1750 i2c_del_mux_adapter(stm->adap[i]);
1751 return 0;
1752 }
1753
1754 static const struct i2c_device_id unittest_i2c_mux_id[] = {
1755 { .name = "unittest-i2c-mux" },
1756 { }
1757 };
1758
1759 static struct i2c_driver unittest_i2c_mux_driver = {
1760 .driver = {
1761 .name = "unittest-i2c-mux",
1762 },
1763 .probe = unittest_i2c_mux_probe,
1764 .remove = unittest_i2c_mux_remove,
1765 .id_table = unittest_i2c_mux_id,
1766 };
1767
1768 #endif
1769
1770 static int of_unittest_overlay_i2c_init(void)
1771 {
1772 int ret;
1773
1774 ret = i2c_add_driver(&unittest_i2c_dev_driver);
1775 if (unittest(ret == 0,
1776 "could not register unittest i2c device driver\n"))
1777 return ret;
1778
1779 ret = platform_driver_register(&unittest_i2c_bus_driver);
1780 if (unittest(ret == 0,
1781 "could not register unittest i2c bus driver\n"))
1782 return ret;
1783
1784 #if IS_BUILTIN(CONFIG_I2C_MUX)
1785 ret = i2c_add_driver(&unittest_i2c_mux_driver);
1786 if (unittest(ret == 0,
1787 "could not register unittest i2c mux driver\n"))
1788 return ret;
1789 #endif
1790
1791 return 0;
1792 }
1793
1794 static void of_unittest_overlay_i2c_cleanup(void)
1795 {
1796 #if IS_BUILTIN(CONFIG_I2C_MUX)
1797 i2c_del_driver(&unittest_i2c_mux_driver);
1798 #endif
1799 platform_driver_unregister(&unittest_i2c_bus_driver);
1800 i2c_del_driver(&unittest_i2c_dev_driver);
1801 }
1802
1803 static void of_unittest_overlay_i2c_12(void)
1804 {
1805 int ret;
1806
1807 /* device should enable */
1808 ret = of_unittest_apply_overlay_check(12, 12, 0, 1, I2C_OVERLAY);
1809 if (ret != 0)
1810 return;
1811
1812 unittest(1, "overlay test %d passed\n", 12);
1813 }
1814
1815 /* test deactivation of device */
1816 static void of_unittest_overlay_i2c_13(void)
1817 {
1818 int ret;
1819
1820 /* device should disable */
1821 ret = of_unittest_apply_overlay_check(13, 13, 1, 0, I2C_OVERLAY);
1822 if (ret != 0)
1823 return;
1824
1825 unittest(1, "overlay test %d passed\n", 13);
1826 }
1827
1828 /* just check for i2c mux existence */
1829 static void of_unittest_overlay_i2c_14(void)
1830 {
1831 }
1832
1833 static void of_unittest_overlay_i2c_15(void)
1834 {
1835 int ret;
1836
1837 /* device should enable */
1838 ret = of_unittest_apply_overlay_check(16, 15, 0, 1, I2C_OVERLAY);
1839 if (ret != 0)
1840 return;
1841
1842 unittest(1, "overlay test %d passed\n", 15);
1843 }
1844
1845 #else
1846
1847 static inline void of_unittest_overlay_i2c_14(void) { }
1848 static inline void of_unittest_overlay_i2c_15(void) { }
1849
1850 #endif
1851
1852 static void __init of_unittest_overlay(void)
1853 {
1854 struct device_node *bus_np = NULL;
1855 int ret;
1856
1857 ret = platform_driver_register(&unittest_driver);
1858 if (ret != 0) {
1859 unittest(0, "could not register unittest driver\n");
1860 goto out;
1861 }
1862
1863 bus_np = of_find_node_by_path(bus_path);
1864 if (bus_np == NULL) {
1865 unittest(0, "could not find bus_path \"%s\"\n", bus_path);
1866 goto out;
1867 }
1868
1869 ret = of_platform_populate(bus_np, of_default_bus_match_table,
1870 NULL, NULL);
1871 if (ret != 0) {
1872 unittest(0, "could not populate bus @ \"%s\"\n", bus_path);
1873 goto out;
1874 }
1875
1876 if (!of_unittest_device_exists(100, PDEV_OVERLAY)) {
1877 unittest(0, "could not find unittest0 @ \"%s\"\n",
1878 unittest_path(100, PDEV_OVERLAY));
1879 goto out;
1880 }
1881
1882 if (of_unittest_device_exists(101, PDEV_OVERLAY)) {
1883 unittest(0, "unittest1 @ \"%s\" should not exist\n",
1884 unittest_path(101, PDEV_OVERLAY));
1885 goto out;
1886 }
1887
1888 unittest(1, "basic infrastructure of overlays passed");
1889
1890 /* tests in sequence */
1891 of_unittest_overlay_0();
1892 of_unittest_overlay_1();
1893 of_unittest_overlay_2();
1894 of_unittest_overlay_3();
1895 of_unittest_overlay_4();
1896 of_unittest_overlay_5();
1897 of_unittest_overlay_6();
1898 of_unittest_overlay_8();
1899
1900 of_unittest_overlay_10();
1901 of_unittest_overlay_11();
1902
1903 #if IS_BUILTIN(CONFIG_I2C)
1904 if (unittest(of_unittest_overlay_i2c_init() == 0, "i2c init failed\n"))
1905 goto out;
1906
1907 of_unittest_overlay_i2c_12();
1908 of_unittest_overlay_i2c_13();
1909 of_unittest_overlay_i2c_14();
1910 of_unittest_overlay_i2c_15();
1911
1912 of_unittest_overlay_i2c_cleanup();
1913 #endif
1914
1915 of_unittest_destroy_tracked_overlays();
1916
1917 out:
1918 of_node_put(bus_np);
1919 }
1920
1921 #else
1922 static inline void __init of_unittest_overlay(void) { }
1923 #endif
1924
1925 static int __init of_unittest(void)
1926 {
1927 struct device_node *np;
1928 int res;
1929
1930 /* adding data for unittest */
1931 res = unittest_data_add();
1932 if (res)
1933 return res;
1934 if (!of_aliases)
1935 of_aliases = of_find_node_by_path("/aliases");
1936
1937 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
1938 if (!np) {
1939 pr_info("No testcase data in device tree; not running tests\n");
1940 return 0;
1941 }
1942 of_node_put(np);
1943
1944 pr_info("start of unittest - you will see error messages\n");
1945 of_unittest_check_tree_linkage();
1946 of_unittest_check_phandles();
1947 of_unittest_find_node_by_name();
1948 of_unittest_dynamic();
1949 of_unittest_parse_phandle_with_args();
1950 of_unittest_property_string();
1951 of_unittest_property_copy();
1952 of_unittest_changeset();
1953 of_unittest_parse_interrupts();
1954 of_unittest_parse_interrupts_extended();
1955 of_unittest_match_node();
1956 of_unittest_platform_populate();
1957 of_unittest_overlay();
1958
1959 /* Double check linkage after removing testcase data */
1960 of_unittest_check_tree_linkage();
1961
1962 pr_info("end of unittest - %i passed, %i failed\n",
1963 unittest_results.passed, unittest_results.failed);
1964
1965 return 0;
1966 }
1967 late_initcall(of_unittest);
Linux with added FPC-III support