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of/unittest: early return from test skips tests
[linux/fpc-iii.git] / drivers / of / unittest.c
blob3b155774dfeefca9f3234ec014dcc58dfd04aaad
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 "of_private.h"
27
28 static struct selftest_results {
29 int passed;
30 int failed;
31 } selftest_results;
32
33 #define selftest(result, fmt, ...) ({ \
34 bool failed = !(result); \
35 if (failed) { \
36 selftest_results.failed++; \
37 pr_err("FAIL %s():%i " fmt, __func__, __LINE__, ##__VA_ARGS__); \
38 } else { \
39 selftest_results.passed++; \
40 pr_debug("pass %s():%i\n", __func__, __LINE__); \
41 } \
42 failed; \
43 })
44
45 static void __init of_selftest_find_node_by_name(void)
46 {
47 struct device_node *np;
48 const char *options;
49
50 np = of_find_node_by_path("/testcase-data");
51 selftest(np && !strcmp("/testcase-data", np->full_name),
52 "find /testcase-data failed\n");
53 of_node_put(np);
54
55 /* Test if trailing '/' works */
56 np = of_find_node_by_path("/testcase-data/");
57 selftest(!np, "trailing '/' on /testcase-data/ should fail\n");
58
59 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
60 selftest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", np->full_name),
61 "find /testcase-data/phandle-tests/consumer-a failed\n");
62 of_node_put(np);
63
64 np = of_find_node_by_path("testcase-alias");
65 selftest(np && !strcmp("/testcase-data", np->full_name),
66 "find testcase-alias failed\n");
67 of_node_put(np);
68
69 /* Test if trailing '/' works on aliases */
70 np = of_find_node_by_path("testcase-alias/");
71 selftest(!np, "trailing '/' on testcase-alias/ should fail\n");
72
73 np = of_find_node_by_path("testcase-alias/phandle-tests/consumer-a");
74 selftest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", np->full_name),
75 "find testcase-alias/phandle-tests/consumer-a failed\n");
76 of_node_put(np);
77
78 np = of_find_node_by_path("/testcase-data/missing-path");
79 selftest(!np, "non-existent path returned node %s\n", np->full_name);
80 of_node_put(np);
81
82 np = of_find_node_by_path("missing-alias");
83 selftest(!np, "non-existent alias returned node %s\n", np->full_name);
84 of_node_put(np);
85
86 np = of_find_node_by_path("testcase-alias/missing-path");
87 selftest(!np, "non-existent alias with relative path returned node %s\n", np->full_name);
88 of_node_put(np);
89
90 np = of_find_node_opts_by_path("/testcase-data:testoption", &options);
91 selftest(np && !strcmp("testoption", options),
92 "option path test failed\n");
93 of_node_put(np);
94
95 np = of_find_node_opts_by_path("/testcase-data:test/option", &options);
96 selftest(np && !strcmp("test/option", options),
97 "option path test, subcase #1 failed\n");
98 of_node_put(np);
99
100 np = of_find_node_opts_by_path("/testcase-data/testcase-device1:test/option", &options);
101 selftest(np && !strcmp("test/option", options),
102 "option path test, subcase #2 failed\n");
103 of_node_put(np);
104
105 np = of_find_node_opts_by_path("/testcase-data:testoption", NULL);
106 selftest(np, "NULL option path test failed\n");
107 of_node_put(np);
108
109 np = of_find_node_opts_by_path("testcase-alias:testaliasoption",
110 &options);
111 selftest(np && !strcmp("testaliasoption", options),
112 "option alias path test failed\n");
113 of_node_put(np);
114
115 np = of_find_node_opts_by_path("testcase-alias:test/alias/option",
116 &options);
117 selftest(np && !strcmp("test/alias/option", options),
118 "option alias path test, subcase #1 failed\n");
119 of_node_put(np);
120
121 np = of_find_node_opts_by_path("testcase-alias:testaliasoption", NULL);
122 selftest(np, "NULL option alias path test failed\n");
123 of_node_put(np);
124
125 options = "testoption";
126 np = of_find_node_opts_by_path("testcase-alias", &options);
127 selftest(np && !options, "option clearing test failed\n");
128 of_node_put(np);
129
130 options = "testoption";
131 np = of_find_node_opts_by_path("/", &options);
132 selftest(np && !options, "option clearing root node test failed\n");
133 of_node_put(np);
134 }
135
136 static void __init of_selftest_dynamic(void)
137 {
138 struct device_node *np;
139 struct property *prop;
140
141 np = of_find_node_by_path("/testcase-data");
142 if (!np) {
143 pr_err("missing testcase data\n");
144 return;
145 }
146
147 /* Array of 4 properties for the purpose of testing */
148 prop = kzalloc(sizeof(*prop) * 4, GFP_KERNEL);
149 if (!prop) {
150 selftest(0, "kzalloc() failed\n");
151 return;
152 }
153
154 /* Add a new property - should pass*/
155 prop->name = "new-property";
156 prop->value = "new-property-data";
157 prop->length = strlen(prop->value);
158 selftest(of_add_property(np, prop) == 0, "Adding a new property failed\n");
159
160 /* Try to add an existing property - should fail */
161 prop++;
162 prop->name = "new-property";
163 prop->value = "new-property-data-should-fail";
164 prop->length = strlen(prop->value);
165 selftest(of_add_property(np, prop) != 0,
166 "Adding an existing property should have failed\n");
167
168 /* Try to modify an existing property - should pass */
169 prop->value = "modify-property-data-should-pass";
170 prop->length = strlen(prop->value);
171 selftest(of_update_property(np, prop) == 0,
172 "Updating an existing property should have passed\n");
173
174 /* Try to modify non-existent property - should pass*/
175 prop++;
176 prop->name = "modify-property";
177 prop->value = "modify-missing-property-data-should-pass";
178 prop->length = strlen(prop->value);
179 selftest(of_update_property(np, prop) == 0,
180 "Updating a missing property should have passed\n");
181
182 /* Remove property - should pass */
183 selftest(of_remove_property(np, prop) == 0,
184 "Removing a property should have passed\n");
185
186 /* Adding very large property - should pass */
187 prop++;
188 prop->name = "large-property-PAGE_SIZEx8";
189 prop->length = PAGE_SIZE * 8;
190 prop->value = kzalloc(prop->length, GFP_KERNEL);
191 selftest(prop->value != NULL, "Unable to allocate large buffer\n");
192 if (prop->value)
193 selftest(of_add_property(np, prop) == 0,
194 "Adding a large property should have passed\n");
195 }
196
197 static int __init of_selftest_check_node_linkage(struct device_node *np)
198 {
199 struct device_node *child;
200 int count = 0, rc;
201
202 for_each_child_of_node(np, child) {
203 if (child->parent != np) {
204 pr_err("Child node %s links to wrong parent %s\n",
205 child->name, np->name);
206 return -EINVAL;
207 }
208
209 rc = of_selftest_check_node_linkage(child);
210 if (rc < 0)
211 return rc;
212 count += rc;
213 }
214
215 return count + 1;
216 }
217
218 static void __init of_selftest_check_tree_linkage(void)
219 {
220 struct device_node *np;
221 int allnode_count = 0, child_count;
222
223 if (!of_root)
224 return;
225
226 for_each_of_allnodes(np)
227 allnode_count++;
228 child_count = of_selftest_check_node_linkage(of_root);
229
230 selftest(child_count > 0, "Device node data structure is corrupted\n");
231 selftest(child_count == allnode_count,
232 "allnodes list size (%i) doesn't match sibling lists size (%i)\n",
233 allnode_count, child_count);
234 pr_debug("allnodes list size (%i); sibling lists size (%i)\n", allnode_count, child_count);
235 }
236
237 struct node_hash {
238 struct hlist_node node;
239 struct device_node *np;
240 };
241
242 static DEFINE_HASHTABLE(phandle_ht, 8);
243 static void __init of_selftest_check_phandles(void)
244 {
245 struct device_node *np;
246 struct node_hash *nh;
247 struct hlist_node *tmp;
248 int i, dup_count = 0, phandle_count = 0;
249
250 for_each_of_allnodes(np) {
251 if (!np->phandle)
252 continue;
253
254 hash_for_each_possible(phandle_ht, nh, node, np->phandle) {
255 if (nh->np->phandle == np->phandle) {
256 pr_info("Duplicate phandle! %i used by %s and %s\n",
257 np->phandle, nh->np->full_name, np->full_name);
258 dup_count++;
259 break;
260 }
261 }
262
263 nh = kzalloc(sizeof(*nh), GFP_KERNEL);
264 if (WARN_ON(!nh))
265 return;
266
267 nh->np = np;
268 hash_add(phandle_ht, &nh->node, np->phandle);
269 phandle_count++;
270 }
271 selftest(dup_count == 0, "Found %i duplicates in %i phandles\n",
272 dup_count, phandle_count);
273
274 /* Clean up */
275 hash_for_each_safe(phandle_ht, i, tmp, nh, node) {
276 hash_del(&nh->node);
277 kfree(nh);
278 }
279 }
280
281 static void __init of_selftest_parse_phandle_with_args(void)
282 {
283 struct device_node *np;
284 struct of_phandle_args args;
285 int i, rc;
286
287 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
288 if (!np) {
289 pr_err("missing testcase data\n");
290 return;
291 }
292
293 rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
294 selftest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc);
295
296 for (i = 0; i < 8; i++) {
297 bool passed = true;
298
299 rc = of_parse_phandle_with_args(np, "phandle-list",
300 "#phandle-cells", i, &args);
301
302 /* Test the values from tests-phandle.dtsi */
303 switch (i) {
304 case 0:
305 passed &= !rc;
306 passed &= (args.args_count == 1);
307 passed &= (args.args[0] == (i + 1));
308 break;
309 case 1:
310 passed &= !rc;
311 passed &= (args.args_count == 2);
312 passed &= (args.args[0] == (i + 1));
313 passed &= (args.args[1] == 0);
314 break;
315 case 2:
316 passed &= (rc == -ENOENT);
317 break;
318 case 3:
319 passed &= !rc;
320 passed &= (args.args_count == 3);
321 passed &= (args.args[0] == (i + 1));
322 passed &= (args.args[1] == 4);
323 passed &= (args.args[2] == 3);
324 break;
325 case 4:
326 passed &= !rc;
327 passed &= (args.args_count == 2);
328 passed &= (args.args[0] == (i + 1));
329 passed &= (args.args[1] == 100);
330 break;
331 case 5:
332 passed &= !rc;
333 passed &= (args.args_count == 0);
334 break;
335 case 6:
336 passed &= !rc;
337 passed &= (args.args_count == 1);
338 passed &= (args.args[0] == (i + 1));
339 break;
340 case 7:
341 passed &= (rc == -ENOENT);
342 break;
343 default:
344 passed = false;
345 }
346
347 selftest(passed, "index %i - data error on node %s rc=%i\n",
348 i, args.np->full_name, rc);
349 }
350
351 /* Check for missing list property */
352 rc = of_parse_phandle_with_args(np, "phandle-list-missing",
353 "#phandle-cells", 0, &args);
354 selftest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
355 rc = of_count_phandle_with_args(np, "phandle-list-missing",
356 "#phandle-cells");
357 selftest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
358
359 /* Check for missing cells property */
360 rc = of_parse_phandle_with_args(np, "phandle-list",
361 "#phandle-cells-missing", 0, &args);
362 selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
363 rc = of_count_phandle_with_args(np, "phandle-list",
364 "#phandle-cells-missing");
365 selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
366
367 /* Check for bad phandle in list */
368 rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle",
369 "#phandle-cells", 0, &args);
370 selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
371 rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle",
372 "#phandle-cells");
373 selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
374
375 /* Check for incorrectly formed argument list */
376 rc = of_parse_phandle_with_args(np, "phandle-list-bad-args",
377 "#phandle-cells", 1, &args);
378 selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
379 rc = of_count_phandle_with_args(np, "phandle-list-bad-args",
380 "#phandle-cells");
381 selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
382 }
383
384 static void __init of_selftest_property_string(void)
385 {
386 const char *strings[4];
387 struct device_node *np;
388 int rc;
389
390 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
391 if (!np) {
392 pr_err("No testcase data in device tree\n");
393 return;
394 }
395
396 rc = of_property_match_string(np, "phandle-list-names", "first");
397 selftest(rc == 0, "first expected:0 got:%i\n", rc);
398 rc = of_property_match_string(np, "phandle-list-names", "second");
399 selftest(rc == 1, "second expected:1 got:%i\n", rc);
400 rc = of_property_match_string(np, "phandle-list-names", "third");
401 selftest(rc == 2, "third expected:2 got:%i\n", rc);
402 rc = of_property_match_string(np, "phandle-list-names", "fourth");
403 selftest(rc == -ENODATA, "unmatched string; rc=%i\n", rc);
404 rc = of_property_match_string(np, "missing-property", "blah");
405 selftest(rc == -EINVAL, "missing property; rc=%i\n", rc);
406 rc = of_property_match_string(np, "empty-property", "blah");
407 selftest(rc == -ENODATA, "empty property; rc=%i\n", rc);
408 rc = of_property_match_string(np, "unterminated-string", "blah");
409 selftest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
410
411 /* of_property_count_strings() tests */
412 rc = of_property_count_strings(np, "string-property");
413 selftest(rc == 1, "Incorrect string count; rc=%i\n", rc);
414 rc = of_property_count_strings(np, "phandle-list-names");
415 selftest(rc == 3, "Incorrect string count; rc=%i\n", rc);
416 rc = of_property_count_strings(np, "unterminated-string");
417 selftest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
418 rc = of_property_count_strings(np, "unterminated-string-list");
419 selftest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
420
421 /* of_property_read_string_index() tests */
422 rc = of_property_read_string_index(np, "string-property", 0, strings);
423 selftest(rc == 0 && !strcmp(strings[0], "foobar"), "of_property_read_string_index() failure; rc=%i\n", rc);
424 strings[0] = NULL;
425 rc = of_property_read_string_index(np, "string-property", 1, strings);
426 selftest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
427 rc = of_property_read_string_index(np, "phandle-list-names", 0, strings);
428 selftest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
429 rc = of_property_read_string_index(np, "phandle-list-names", 1, strings);
430 selftest(rc == 0 && !strcmp(strings[0], "second"), "of_property_read_string_index() failure; rc=%i\n", rc);
431 rc = of_property_read_string_index(np, "phandle-list-names", 2, strings);
432 selftest(rc == 0 && !strcmp(strings[0], "third"), "of_property_read_string_index() failure; rc=%i\n", rc);
433 strings[0] = NULL;
434 rc = of_property_read_string_index(np, "phandle-list-names", 3, strings);
435 selftest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
436 strings[0] = NULL;
437 rc = of_property_read_string_index(np, "unterminated-string", 0, strings);
438 selftest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
439 rc = of_property_read_string_index(np, "unterminated-string-list", 0, strings);
440 selftest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
441 strings[0] = NULL;
442 rc = of_property_read_string_index(np, "unterminated-string-list", 2, strings); /* should fail */
443 selftest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
444 strings[1] = NULL;
445
446 /* of_property_read_string_array() tests */
447 rc = of_property_read_string_array(np, "string-property", strings, 4);
448 selftest(rc == 1, "Incorrect string count; rc=%i\n", rc);
449 rc = of_property_read_string_array(np, "phandle-list-names", strings, 4);
450 selftest(rc == 3, "Incorrect string count; rc=%i\n", rc);
451 rc = of_property_read_string_array(np, "unterminated-string", strings, 4);
452 selftest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
453 /* -- An incorrectly formed string should cause a failure */
454 rc = of_property_read_string_array(np, "unterminated-string-list", strings, 4);
455 selftest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
456 /* -- parsing the correctly formed strings should still work: */
457 strings[2] = NULL;
458 rc = of_property_read_string_array(np, "unterminated-string-list", strings, 2);
459 selftest(rc == 2 && strings[2] == NULL, "of_property_read_string_array() failure; rc=%i\n", rc);
460 strings[1] = NULL;
461 rc = of_property_read_string_array(np, "phandle-list-names", strings, 1);
462 selftest(rc == 1 && strings[1] == NULL, "Overwrote end of string array; rc=%i, str='%s'\n", rc, strings[1]);
463 }
464
465 #define propcmp(p1, p2) (((p1)->length == (p2)->length) && \
466 (p1)->value && (p2)->value && \
467 !memcmp((p1)->value, (p2)->value, (p1)->length) && \
468 !strcmp((p1)->name, (p2)->name))
469 static void __init of_selftest_property_copy(void)
470 {
471 #ifdef CONFIG_OF_DYNAMIC
472 struct property p1 = { .name = "p1", .length = 0, .value = "" };
473 struct property p2 = { .name = "p2", .length = 5, .value = "abcd" };
474 struct property *new;
475
476 new = __of_prop_dup(&p1, GFP_KERNEL);
477 selftest(new && propcmp(&p1, new), "empty property didn't copy correctly\n");
478 kfree(new->value);
479 kfree(new->name);
480 kfree(new);
481
482 new = __of_prop_dup(&p2, GFP_KERNEL);
483 selftest(new && propcmp(&p2, new), "non-empty property didn't copy correctly\n");
484 kfree(new->value);
485 kfree(new->name);
486 kfree(new);
487 #endif
488 }
489
490 static void __init of_selftest_changeset(void)
491 {
492 #ifdef CONFIG_OF_DYNAMIC
493 struct property *ppadd, padd = { .name = "prop-add", .length = 0, .value = "" };
494 struct property *ppupdate, pupdate = { .name = "prop-update", .length = 5, .value = "abcd" };
495 struct property *ppremove;
496 struct device_node *n1, *n2, *n21, *nremove, *parent, *np;
497 struct of_changeset chgset;
498
499 n1 = __of_node_dup(NULL, "/testcase-data/changeset/n1");
500 selftest(n1, "testcase setup failure\n");
501 n2 = __of_node_dup(NULL, "/testcase-data/changeset/n2");
502 selftest(n2, "testcase setup failure\n");
503 n21 = __of_node_dup(NULL, "%s/%s", "/testcase-data/changeset/n2", "n21");
504 selftest(n21, "testcase setup failure %p\n", n21);
505 nremove = of_find_node_by_path("/testcase-data/changeset/node-remove");
506 selftest(nremove, "testcase setup failure\n");
507 ppadd = __of_prop_dup(&padd, GFP_KERNEL);
508 selftest(ppadd, "testcase setup failure\n");
509 ppupdate = __of_prop_dup(&pupdate, GFP_KERNEL);
510 selftest(ppupdate, "testcase setup failure\n");
511 parent = nremove->parent;
512 n1->parent = parent;
513 n2->parent = parent;
514 n21->parent = n2;
515 n2->child = n21;
516 ppremove = of_find_property(parent, "prop-remove", NULL);
517 selftest(ppremove, "failed to find removal prop");
518
519 of_changeset_init(&chgset);
520 selftest(!of_changeset_attach_node(&chgset, n1), "fail attach n1\n");
521 selftest(!of_changeset_attach_node(&chgset, n2), "fail attach n2\n");
522 selftest(!of_changeset_detach_node(&chgset, nremove), "fail remove node\n");
523 selftest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n");
524 selftest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop\n");
525 selftest(!of_changeset_update_property(&chgset, parent, ppupdate), "fail update prop\n");
526 selftest(!of_changeset_remove_property(&chgset, parent, ppremove), "fail remove prop\n");
527 mutex_lock(&of_mutex);
528 selftest(!of_changeset_apply(&chgset), "apply failed\n");
529 mutex_unlock(&of_mutex);
530
531 /* Make sure node names are constructed correctly */
532 selftest((np = of_find_node_by_path("/testcase-data/changeset/n2/n21")),
533 "'%s' not added\n", n21->full_name);
534 of_node_put(np);
535
536 mutex_lock(&of_mutex);
537 selftest(!of_changeset_revert(&chgset), "revert failed\n");
538 mutex_unlock(&of_mutex);
539
540 of_changeset_destroy(&chgset);
541 #endif
542 }
543
544 static void __init of_selftest_parse_interrupts(void)
545 {
546 struct device_node *np;
547 struct of_phandle_args args;
548 int i, rc;
549
550 np = of_find_node_by_path("/testcase-data/interrupts/interrupts0");
551 if (!np) {
552 pr_err("missing testcase data\n");
553 return;
554 }
555
556 for (i = 0; i < 4; i++) {
557 bool passed = true;
558
559 args.args_count = 0;
560 rc = of_irq_parse_one(np, i, &args);
561
562 passed &= !rc;
563 passed &= (args.args_count == 1);
564 passed &= (args.args[0] == (i + 1));
565
566 selftest(passed, "index %i - data error on node %s rc=%i\n",
567 i, args.np->full_name, rc);
568 }
569 of_node_put(np);
570
571 np = of_find_node_by_path("/testcase-data/interrupts/interrupts1");
572 if (!np) {
573 pr_err("missing testcase data\n");
574 return;
575 }
576
577 for (i = 0; i < 4; i++) {
578 bool passed = true;
579
580 args.args_count = 0;
581 rc = of_irq_parse_one(np, i, &args);
582
583 /* Test the values from tests-phandle.dtsi */
584 switch (i) {
585 case 0:
586 passed &= !rc;
587 passed &= (args.args_count == 1);
588 passed &= (args.args[0] == 9);
589 break;
590 case 1:
591 passed &= !rc;
592 passed &= (args.args_count == 3);
593 passed &= (args.args[0] == 10);
594 passed &= (args.args[1] == 11);
595 passed &= (args.args[2] == 12);
596 break;
597 case 2:
598 passed &= !rc;
599 passed &= (args.args_count == 2);
600 passed &= (args.args[0] == 13);
601 passed &= (args.args[1] == 14);
602 break;
603 case 3:
604 passed &= !rc;
605 passed &= (args.args_count == 2);
606 passed &= (args.args[0] == 15);
607 passed &= (args.args[1] == 16);
608 break;
609 default:
610 passed = false;
611 }
612 selftest(passed, "index %i - data error on node %s rc=%i\n",
613 i, args.np->full_name, rc);
614 }
615 of_node_put(np);
616 }
617
618 static void __init of_selftest_parse_interrupts_extended(void)
619 {
620 struct device_node *np;
621 struct of_phandle_args args;
622 int i, rc;
623
624 np = of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0");
625 if (!np) {
626 pr_err("missing testcase data\n");
627 return;
628 }
629
630 for (i = 0; i < 7; i++) {
631 bool passed = true;
632
633 rc = of_irq_parse_one(np, i, &args);
634
635 /* Test the values from tests-phandle.dtsi */
636 switch (i) {
637 case 0:
638 passed &= !rc;
639 passed &= (args.args_count == 1);
640 passed &= (args.args[0] == 1);
641 break;
642 case 1:
643 passed &= !rc;
644 passed &= (args.args_count == 3);
645 passed &= (args.args[0] == 2);
646 passed &= (args.args[1] == 3);
647 passed &= (args.args[2] == 4);
648 break;
649 case 2:
650 passed &= !rc;
651 passed &= (args.args_count == 2);
652 passed &= (args.args[0] == 5);
653 passed &= (args.args[1] == 6);
654 break;
655 case 3:
656 passed &= !rc;
657 passed &= (args.args_count == 1);
658 passed &= (args.args[0] == 9);
659 break;
660 case 4:
661 passed &= !rc;
662 passed &= (args.args_count == 3);
663 passed &= (args.args[0] == 10);
664 passed &= (args.args[1] == 11);
665 passed &= (args.args[2] == 12);
666 break;
667 case 5:
668 passed &= !rc;
669 passed &= (args.args_count == 2);
670 passed &= (args.args[0] == 13);
671 passed &= (args.args[1] == 14);
672 break;
673 case 6:
674 passed &= !rc;
675 passed &= (args.args_count == 1);
676 passed &= (args.args[0] == 15);
677 break;
678 default:
679 passed = false;
680 }
681
682 selftest(passed, "index %i - data error on node %s rc=%i\n",
683 i, args.np->full_name, rc);
684 }
685 of_node_put(np);
686 }
687
688 static const struct of_device_id match_node_table[] = {
689 { .data = "A", .name = "name0", }, /* Name alone is lowest priority */
690 { .data = "B", .type = "type1", }, /* followed by type alone */
691
692 { .data = "Ca", .name = "name2", .type = "type1", }, /* followed by both together */
693 { .data = "Cb", .name = "name2", }, /* Only match when type doesn't match */
694 { .data = "Cc", .name = "name2", .type = "type2", },
695
696 { .data = "E", .compatible = "compat3" },
697 { .data = "G", .compatible = "compat2", },
698 { .data = "H", .compatible = "compat2", .name = "name5", },
699 { .data = "I", .compatible = "compat2", .type = "type1", },
700 { .data = "J", .compatible = "compat2", .type = "type1", .name = "name8", },
701 { .data = "K", .compatible = "compat2", .name = "name9", },
702 {}
703 };
704
705 static struct {
706 const char *path;
707 const char *data;
708 } match_node_tests[] = {
709 { .path = "/testcase-data/match-node/name0", .data = "A", },
710 { .path = "/testcase-data/match-node/name1", .data = "B", },
711 { .path = "/testcase-data/match-node/a/name2", .data = "Ca", },
712 { .path = "/testcase-data/match-node/b/name2", .data = "Cb", },
713 { .path = "/testcase-data/match-node/c/name2", .data = "Cc", },
714 { .path = "/testcase-data/match-node/name3", .data = "E", },
715 { .path = "/testcase-data/match-node/name4", .data = "G", },
716 { .path = "/testcase-data/match-node/name5", .data = "H", },
717 { .path = "/testcase-data/match-node/name6", .data = "G", },
718 { .path = "/testcase-data/match-node/name7", .data = "I", },
719 { .path = "/testcase-data/match-node/name8", .data = "J", },
720 { .path = "/testcase-data/match-node/name9", .data = "K", },
721 };
722
723 static void __init of_selftest_match_node(void)
724 {
725 struct device_node *np;
726 const struct of_device_id *match;
727 int i;
728
729 for (i = 0; i < ARRAY_SIZE(match_node_tests); i++) {
730 np = of_find_node_by_path(match_node_tests[i].path);
731 if (!np) {
732 selftest(0, "missing testcase node %s\n",
733 match_node_tests[i].path);
734 continue;
735 }
736
737 match = of_match_node(match_node_table, np);
738 if (!match) {
739 selftest(0, "%s didn't match anything\n",
740 match_node_tests[i].path);
741 continue;
742 }
743
744 if (strcmp(match->data, match_node_tests[i].data) != 0) {
745 selftest(0, "%s got wrong match. expected %s, got %s\n",
746 match_node_tests[i].path, match_node_tests[i].data,
747 (const char *)match->data);
748 continue;
749 }
750 selftest(1, "passed");
751 }
752 }
753
754 struct device test_bus = {
755 .init_name = "unittest-bus",
756 };
757 static void __init of_selftest_platform_populate(void)
758 {
759 int irq, rc;
760 struct device_node *np, *child, *grandchild;
761 struct platform_device *pdev;
762 const struct of_device_id match[] = {
763 { .compatible = "test-device", },
764 {}
765 };
766
767 np = of_find_node_by_path("/testcase-data");
768 of_platform_populate(np, of_default_bus_match_table, NULL, NULL);
769
770 /* Test that a missing irq domain returns -EPROBE_DEFER */
771 np = of_find_node_by_path("/testcase-data/testcase-device1");
772 pdev = of_find_device_by_node(np);
773 selftest(pdev, "device 1 creation failed\n");
774
775 irq = platform_get_irq(pdev, 0);
776 selftest(irq == -EPROBE_DEFER, "device deferred probe failed - %d\n", irq);
777
778 /* Test that a parsing failure does not return -EPROBE_DEFER */
779 np = of_find_node_by_path("/testcase-data/testcase-device2");
780 pdev = of_find_device_by_node(np);
781 selftest(pdev, "device 2 creation failed\n");
782 irq = platform_get_irq(pdev, 0);
783 selftest(irq < 0 && irq != -EPROBE_DEFER, "device parsing error failed - %d\n", irq);
784
785 np = of_find_node_by_path("/testcase-data/platform-tests");
786 selftest(np, "No testcase data in device tree\n");
787 if (!np)
788 return;
789
790 rc = device_register(&test_bus);
791 selftest(!rc, "testbus registration failed; rc=%i\n", rc);
792 if (rc)
793 return;
794
795 for_each_child_of_node(np, child) {
796 of_platform_populate(child, match, NULL, &test_bus);
797 for_each_child_of_node(child, grandchild)
798 selftest(of_find_device_by_node(grandchild),
799 "Could not create device for node '%s'\n",
800 grandchild->name);
801 }
802
803 of_platform_depopulate(&test_bus);
804 for_each_child_of_node(np, child) {
805 for_each_child_of_node(child, grandchild)
806 selftest(!of_find_device_by_node(grandchild),
807 "device didn't get destroyed '%s'\n",
808 grandchild->name);
809 }
810
811 device_unregister(&test_bus);
812 of_node_put(np);
813 }
814
815 /**
816 * update_node_properties - adds the properties
817 * of np into dup node (present in live tree) and
818 * updates parent of children of np to dup.
819 *
820 * @np: node already present in live tree
821 * @dup: node present in live tree to be updated
822 */
823 static void update_node_properties(struct device_node *np,
824 struct device_node *dup)
825 {
826 struct property *prop;
827 struct device_node *child;
828
829 for_each_property_of_node(np, prop)
830 of_add_property(dup, prop);
831
832 for_each_child_of_node(np, child)
833 child->parent = dup;
834 }
835
836 /**
837 * attach_node_and_children - attaches nodes
838 * and its children to live tree
839 *
840 * @np: Node to attach to live tree
841 */
842 static int attach_node_and_children(struct device_node *np)
843 {
844 struct device_node *next, *dup, *child;
845 unsigned long flags;
846
847 dup = of_find_node_by_path(np->full_name);
848 if (dup) {
849 update_node_properties(np, dup);
850 return 0;
851 }
852
853 child = np->child;
854 np->child = NULL;
855
856 mutex_lock(&of_mutex);
857 raw_spin_lock_irqsave(&devtree_lock, flags);
858 np->sibling = np->parent->child;
859 np->parent->child = np;
860 of_node_clear_flag(np, OF_DETACHED);
861 raw_spin_unlock_irqrestore(&devtree_lock, flags);
862
863 __of_attach_node_sysfs(np);
864 mutex_unlock(&of_mutex);
865
866 while (child) {
867 next = child->sibling;
868 attach_node_and_children(child);
869 child = next;
870 }
871
872 return 0;
873 }
874
875 /**
876 * selftest_data_add - Reads, copies data from
877 * linked tree and attaches it to the live tree
878 */
879 static int __init selftest_data_add(void)
880 {
881 void *selftest_data;
882 struct device_node *selftest_data_node, *np;
883 /*
884 * __dtb_testcases_begin[] and __dtb_testcases_end[] are magically
885 * created by cmd_dt_S_dtb in scripts/Makefile.lib
886 */
887 extern uint8_t __dtb_testcases_begin[];
888 extern uint8_t __dtb_testcases_end[];
889 const int size = __dtb_testcases_end - __dtb_testcases_begin;
890 int rc;
891
892 if (!size) {
893 pr_warn("%s: No testcase data to attach; not running tests\n",
894 __func__);
895 return -ENODATA;
896 }
897
898 /* creating copy */
899 selftest_data = kmemdup(__dtb_testcases_begin, size, GFP_KERNEL);
900
901 if (!selftest_data) {
902 pr_warn("%s: Failed to allocate memory for selftest_data; "
903 "not running tests\n", __func__);
904 return -ENOMEM;
905 }
906 of_fdt_unflatten_tree(selftest_data, &selftest_data_node);
907 if (!selftest_data_node) {
908 pr_warn("%s: No tree to attach; not running tests\n", __func__);
909 return -ENODATA;
910 }
911 of_node_set_flag(selftest_data_node, OF_DETACHED);
912 rc = of_resolve_phandles(selftest_data_node);
913 if (rc) {
914 pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__, rc);
915 return -EINVAL;
916 }
917
918 if (!of_root) {
919 of_root = selftest_data_node;
920 for_each_of_allnodes(np)
921 __of_attach_node_sysfs(np);
922 of_aliases = of_find_node_by_path("/aliases");
923 of_chosen = of_find_node_by_path("/chosen");
924 return 0;
925 }
926
927 /* attach the sub-tree to live tree */
928 np = selftest_data_node->child;
929 while (np) {
930 struct device_node *next = np->sibling;
931
932 np->parent = of_root;
933 attach_node_and_children(np);
934 np = next;
935 }
936 return 0;
937 }
938
939 #ifdef CONFIG_OF_OVERLAY
940
941 static int selftest_probe(struct platform_device *pdev)
942 {
943 struct device *dev = &pdev->dev;
944 struct device_node *np = dev->of_node;
945
946 if (np == NULL) {
947 dev_err(dev, "No OF data for device\n");
948 return -EINVAL;
949
950 }
951
952 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
953
954 of_platform_populate(np, NULL, NULL, &pdev->dev);
955
956 return 0;
957 }
958
959 static int selftest_remove(struct platform_device *pdev)
960 {
961 struct device *dev = &pdev->dev;
962 struct device_node *np = dev->of_node;
963
964 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
965 return 0;
966 }
967
968 static const struct of_device_id selftest_match[] = {
969 { .compatible = "selftest", },
970 {},
971 };
972
973 static struct platform_driver selftest_driver = {
974 .probe = selftest_probe,
975 .remove = selftest_remove,
976 .driver = {
977 .name = "selftest",
978 .owner = THIS_MODULE,
979 .of_match_table = of_match_ptr(selftest_match),
980 },
981 };
982
983 /* get the platform device instantiated at the path */
984 static struct platform_device *of_path_to_platform_device(const char *path)
985 {
986 struct device_node *np;
987 struct platform_device *pdev;
988
989 np = of_find_node_by_path(path);
990 if (np == NULL)
991 return NULL;
992
993 pdev = of_find_device_by_node(np);
994 of_node_put(np);
995
996 return pdev;
997 }
998
999 /* find out if a platform device exists at that path */
1000 static int of_path_platform_device_exists(const char *path)
1001 {
1002 struct platform_device *pdev;
1003
1004 pdev = of_path_to_platform_device(path);
1005 platform_device_put(pdev);
1006 return pdev != NULL;
1007 }
1008
1009 #if IS_BUILTIN(CONFIG_I2C)
1010
1011 /* get the i2c client device instantiated at the path */
1012 static struct i2c_client *of_path_to_i2c_client(const char *path)
1013 {
1014 struct device_node *np;
1015 struct i2c_client *client;
1016
1017 np = of_find_node_by_path(path);
1018 if (np == NULL)
1019 return NULL;
1020
1021 client = of_find_i2c_device_by_node(np);
1022 of_node_put(np);
1023
1024 return client;
1025 }
1026
1027 /* find out if a i2c client device exists at that path */
1028 static int of_path_i2c_client_exists(const char *path)
1029 {
1030 struct i2c_client *client;
1031
1032 client = of_path_to_i2c_client(path);
1033 if (client)
1034 put_device(&client->dev);
1035 return client != NULL;
1036 }
1037 #else
1038 static int of_path_i2c_client_exists(const char *path)
1039 {
1040 return 0;
1041 }
1042 #endif
1043
1044 enum overlay_type {
1045 PDEV_OVERLAY,
1046 I2C_OVERLAY
1047 };
1048
1049 static int of_path_device_type_exists(const char *path,
1050 enum overlay_type ovtype)
1051 {
1052 switch (ovtype) {
1053 case PDEV_OVERLAY:
1054 return of_path_platform_device_exists(path);
1055 case I2C_OVERLAY:
1056 return of_path_i2c_client_exists(path);
1057 }
1058 return 0;
1059 }
1060
1061 static const char *selftest_path(int nr, enum overlay_type ovtype)
1062 {
1063 const char *base;
1064 static char buf[256];
1065
1066 switch (ovtype) {
1067 case PDEV_OVERLAY:
1068 base = "/testcase-data/overlay-node/test-bus";
1069 break;
1070 case I2C_OVERLAY:
1071 base = "/testcase-data/overlay-node/test-bus/i2c-test-bus";
1072 break;
1073 default:
1074 buf[0] = '\0';
1075 return buf;
1076 }
1077 snprintf(buf, sizeof(buf) - 1, "%s/test-selftest%d", base, nr);
1078 buf[sizeof(buf) - 1] = '\0';
1079 return buf;
1080 }
1081
1082 static int of_selftest_device_exists(int selftest_nr, enum overlay_type ovtype)
1083 {
1084 const char *path;
1085
1086 path = selftest_path(selftest_nr, ovtype);
1087
1088 switch (ovtype) {
1089 case PDEV_OVERLAY:
1090 return of_path_platform_device_exists(path);
1091 case I2C_OVERLAY:
1092 return of_path_i2c_client_exists(path);
1093 }
1094 return 0;
1095 }
1096
1097 static const char *overlay_path(int nr)
1098 {
1099 static char buf[256];
1100
1101 snprintf(buf, sizeof(buf) - 1,
1102 "/testcase-data/overlay%d", nr);
1103 buf[sizeof(buf) - 1] = '\0';
1104
1105 return buf;
1106 }
1107
1108 static const char *bus_path = "/testcase-data/overlay-node/test-bus";
1109
1110 static int of_selftest_apply_overlay(int selftest_nr, int overlay_nr,
1111 int *overlay_id)
1112 {
1113 struct device_node *np = NULL;
1114 int ret, id = -1;
1115
1116 np = of_find_node_by_path(overlay_path(overlay_nr));
1117 if (np == NULL) {
1118 selftest(0, "could not find overlay node @\"%s\"\n",
1119 overlay_path(overlay_nr));
1120 ret = -EINVAL;
1121 goto out;
1122 }
1123
1124 ret = of_overlay_create(np);
1125 if (ret < 0) {
1126 selftest(0, "could not create overlay from \"%s\"\n",
1127 overlay_path(overlay_nr));
1128 goto out;
1129 }
1130 id = ret;
1131
1132 ret = 0;
1133
1134 out:
1135 of_node_put(np);
1136
1137 if (overlay_id)
1138 *overlay_id = id;
1139
1140 return ret;
1141 }
1142
1143 /* apply an overlay while checking before and after states */
1144 static int of_selftest_apply_overlay_check(int overlay_nr, int selftest_nr,
1145 int before, int after, enum overlay_type ovtype)
1146 {
1147 int ret;
1148
1149 /* selftest device must not be in before state */
1150 if (of_selftest_device_exists(selftest_nr, ovtype) != before) {
1151 selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1152 overlay_path(overlay_nr),
1153 selftest_path(selftest_nr, ovtype),
1154 !before ? "enabled" : "disabled");
1155 return -EINVAL;
1156 }
1157
1158 ret = of_selftest_apply_overlay(overlay_nr, selftest_nr, NULL);
1159 if (ret != 0) {
1160 /* of_selftest_apply_overlay already called selftest() */
1161 return ret;
1162 }
1163
1164 /* selftest device must be to set to after state */
1165 if (of_selftest_device_exists(selftest_nr, ovtype) != after) {
1166 selftest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n",
1167 overlay_path(overlay_nr),
1168 selftest_path(selftest_nr, ovtype),
1169 !after ? "enabled" : "disabled");
1170 return -EINVAL;
1171 }
1172
1173 return 0;
1174 }
1175
1176 /* apply an overlay and then revert it while checking before, after states */
1177 static int of_selftest_apply_revert_overlay_check(int overlay_nr,
1178 int selftest_nr, int before, int after,
1179 enum overlay_type ovtype)
1180 {
1181 int ret, ov_id;
1182
1183 /* selftest device must be in before state */
1184 if (of_selftest_device_exists(selftest_nr, ovtype) != before) {
1185 selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1186 overlay_path(overlay_nr),
1187 selftest_path(selftest_nr, ovtype),
1188 !before ? "enabled" : "disabled");
1189 return -EINVAL;
1190 }
1191
1192 /* apply the overlay */
1193 ret = of_selftest_apply_overlay(overlay_nr, selftest_nr, &ov_id);
1194 if (ret != 0) {
1195 /* of_selftest_apply_overlay already called selftest() */
1196 return ret;
1197 }
1198
1199 /* selftest device must be in after state */
1200 if (of_selftest_device_exists(selftest_nr, ovtype) != after) {
1201 selftest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n",
1202 overlay_path(overlay_nr),
1203 selftest_path(selftest_nr, ovtype),
1204 !after ? "enabled" : "disabled");
1205 return -EINVAL;
1206 }
1207
1208 ret = of_overlay_destroy(ov_id);
1209 if (ret != 0) {
1210 selftest(0, "overlay @\"%s\" failed to be destroyed @\"%s\"\n",
1211 overlay_path(overlay_nr),
1212 selftest_path(selftest_nr, ovtype));
1213 return ret;
1214 }
1215
1216 /* selftest device must be again in before state */
1217 if (of_selftest_device_exists(selftest_nr, PDEV_OVERLAY) != before) {
1218 selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1219 overlay_path(overlay_nr),
1220 selftest_path(selftest_nr, ovtype),
1221 !before ? "enabled" : "disabled");
1222 return -EINVAL;
1223 }
1224
1225 return 0;
1226 }
1227
1228 /* test activation of device */
1229 static void of_selftest_overlay_0(void)
1230 {
1231 int ret;
1232
1233 /* device should enable */
1234 ret = of_selftest_apply_overlay_check(0, 0, 0, 1, PDEV_OVERLAY);
1235 if (ret != 0)
1236 return;
1237
1238 selftest(1, "overlay test %d passed\n", 0);
1239 }
1240
1241 /* test deactivation of device */
1242 static void of_selftest_overlay_1(void)
1243 {
1244 int ret;
1245
1246 /* device should disable */
1247 ret = of_selftest_apply_overlay_check(1, 1, 1, 0, PDEV_OVERLAY);
1248 if (ret != 0)
1249 return;
1250
1251 selftest(1, "overlay test %d passed\n", 1);
1252 }
1253
1254 /* test activation of device */
1255 static void of_selftest_overlay_2(void)
1256 {
1257 int ret;
1258
1259 /* device should enable */
1260 ret = of_selftest_apply_overlay_check(2, 2, 0, 1, PDEV_OVERLAY);
1261 if (ret != 0)
1262 return;
1263
1264 selftest(1, "overlay test %d passed\n", 2);
1265 }
1266
1267 /* test deactivation of device */
1268 static void of_selftest_overlay_3(void)
1269 {
1270 int ret;
1271
1272 /* device should disable */
1273 ret = of_selftest_apply_overlay_check(3, 3, 1, 0, PDEV_OVERLAY);
1274 if (ret != 0)
1275 return;
1276
1277 selftest(1, "overlay test %d passed\n", 3);
1278 }
1279
1280 /* test activation of a full device node */
1281 static void of_selftest_overlay_4(void)
1282 {
1283 int ret;
1284
1285 /* device should disable */
1286 ret = of_selftest_apply_overlay_check(4, 4, 0, 1, PDEV_OVERLAY);
1287 if (ret != 0)
1288 return;
1289
1290 selftest(1, "overlay test %d passed\n", 4);
1291 }
1292
1293 /* test overlay apply/revert sequence */
1294 static void of_selftest_overlay_5(void)
1295 {
1296 int ret;
1297
1298 /* device should disable */
1299 ret = of_selftest_apply_revert_overlay_check(5, 5, 0, 1, PDEV_OVERLAY);
1300 if (ret != 0)
1301 return;
1302
1303 selftest(1, "overlay test %d passed\n", 5);
1304 }
1305
1306 /* test overlay application in sequence */
1307 static void of_selftest_overlay_6(void)
1308 {
1309 struct device_node *np;
1310 int ret, i, ov_id[2];
1311 int overlay_nr = 6, selftest_nr = 6;
1312 int before = 0, after = 1;
1313
1314 /* selftest device must be in before state */
1315 for (i = 0; i < 2; i++) {
1316 if (of_selftest_device_exists(selftest_nr + i, PDEV_OVERLAY)
1317 != before) {
1318 selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1319 overlay_path(overlay_nr + i),
1320 selftest_path(selftest_nr + i,
1321 PDEV_OVERLAY),
1322 !before ? "enabled" : "disabled");
1323 return;
1324 }
1325 }
1326
1327 /* apply the overlays */
1328 for (i = 0; i < 2; i++) {
1329
1330 np = of_find_node_by_path(overlay_path(overlay_nr + i));
1331 if (np == NULL) {
1332 selftest(0, "could not find overlay node @\"%s\"\n",
1333 overlay_path(overlay_nr + i));
1334 return;
1335 }
1336
1337 ret = of_overlay_create(np);
1338 if (ret < 0) {
1339 selftest(0, "could not create overlay from \"%s\"\n",
1340 overlay_path(overlay_nr + i));
1341 return;
1342 }
1343 ov_id[i] = ret;
1344 }
1345
1346 for (i = 0; i < 2; i++) {
1347 /* selftest device must be in after state */
1348 if (of_selftest_device_exists(selftest_nr + i, PDEV_OVERLAY)
1349 != after) {
1350 selftest(0, "overlay @\"%s\" failed @\"%s\" %s\n",
1351 overlay_path(overlay_nr + i),
1352 selftest_path(selftest_nr + i,
1353 PDEV_OVERLAY),
1354 !after ? "enabled" : "disabled");
1355 return;
1356 }
1357 }
1358
1359 for (i = 1; i >= 0; i--) {
1360 ret = of_overlay_destroy(ov_id[i]);
1361 if (ret != 0) {
1362 selftest(0, "overlay @\"%s\" failed destroy @\"%s\"\n",
1363 overlay_path(overlay_nr + i),
1364 selftest_path(selftest_nr + i,
1365 PDEV_OVERLAY));
1366 return;
1367 }
1368 }
1369
1370 for (i = 0; i < 2; i++) {
1371 /* selftest device must be again in before state */
1372 if (of_selftest_device_exists(selftest_nr + i, PDEV_OVERLAY)
1373 != before) {
1374 selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1375 overlay_path(overlay_nr + i),
1376 selftest_path(selftest_nr + i,
1377 PDEV_OVERLAY),
1378 !before ? "enabled" : "disabled");
1379 return;
1380 }
1381 }
1382
1383 selftest(1, "overlay test %d passed\n", 6);
1384 }
1385
1386 /* test overlay application in sequence */
1387 static void of_selftest_overlay_8(void)
1388 {
1389 struct device_node *np;
1390 int ret, i, ov_id[2];
1391 int overlay_nr = 8, selftest_nr = 8;
1392
1393 /* we don't care about device state in this test */
1394
1395 /* apply the overlays */
1396 for (i = 0; i < 2; i++) {
1397
1398 np = of_find_node_by_path(overlay_path(overlay_nr + i));
1399 if (np == NULL) {
1400 selftest(0, "could not find overlay node @\"%s\"\n",
1401 overlay_path(overlay_nr + i));
1402 return;
1403 }
1404
1405 ret = of_overlay_create(np);
1406 if (ret < 0) {
1407 selftest(0, "could not create overlay from \"%s\"\n",
1408 overlay_path(overlay_nr + i));
1409 return;
1410 }
1411 ov_id[i] = ret;
1412 }
1413
1414 /* now try to remove first overlay (it should fail) */
1415 ret = of_overlay_destroy(ov_id[0]);
1416 if (ret == 0) {
1417 selftest(0, "overlay @\"%s\" was destroyed @\"%s\"\n",
1418 overlay_path(overlay_nr + 0),
1419 selftest_path(selftest_nr,
1420 PDEV_OVERLAY));
1421 return;
1422 }
1423
1424 /* removing them in order should work */
1425 for (i = 1; i >= 0; i--) {
1426 ret = of_overlay_destroy(ov_id[i]);
1427 if (ret != 0) {
1428 selftest(0, "overlay @\"%s\" not destroyed @\"%s\"\n",
1429 overlay_path(overlay_nr + i),
1430 selftest_path(selftest_nr,
1431 PDEV_OVERLAY));
1432 return;
1433 }
1434 }
1435
1436 selftest(1, "overlay test %d passed\n", 8);
1437 }
1438
1439 /* test insertion of a bus with parent devices */
1440 static void of_selftest_overlay_10(void)
1441 {
1442 int ret;
1443 char *child_path;
1444
1445 /* device should disable */
1446 ret = of_selftest_apply_overlay_check(10, 10, 0, 1, PDEV_OVERLAY);
1447 if (selftest(ret == 0,
1448 "overlay test %d failed; overlay application\n", 10))
1449 return;
1450
1451 child_path = kasprintf(GFP_KERNEL, "%s/test-selftest101",
1452 selftest_path(10, PDEV_OVERLAY));
1453 if (selftest(child_path, "overlay test %d failed; kasprintf\n", 10))
1454 return;
1455
1456 ret = of_path_device_type_exists(child_path, PDEV_OVERLAY);
1457 kfree(child_path);
1458 if (selftest(ret, "overlay test %d failed; no child device\n", 10))
1459 return;
1460 }
1461
1462 /* test insertion of a bus with parent devices (and revert) */
1463 static void of_selftest_overlay_11(void)
1464 {
1465 int ret;
1466
1467 /* device should disable */
1468 ret = of_selftest_apply_revert_overlay_check(11, 11, 0, 1,
1469 PDEV_OVERLAY);
1470 if (selftest(ret == 0,
1471 "overlay test %d failed; overlay application\n", 11))
1472 return;
1473 }
1474
1475 #if IS_BUILTIN(CONFIG_I2C) && IS_ENABLED(CONFIG_OF_OVERLAY)
1476
1477 struct selftest_i2c_bus_data {
1478 struct platform_device *pdev;
1479 struct i2c_adapter adap;
1480 };
1481
1482 static int selftest_i2c_master_xfer(struct i2c_adapter *adap,
1483 struct i2c_msg *msgs, int num)
1484 {
1485 struct selftest_i2c_bus_data *std = i2c_get_adapdata(adap);
1486
1487 (void)std;
1488
1489 return num;
1490 }
1491
1492 static u32 selftest_i2c_functionality(struct i2c_adapter *adap)
1493 {
1494 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
1495 }
1496
1497 static const struct i2c_algorithm selftest_i2c_algo = {
1498 .master_xfer = selftest_i2c_master_xfer,
1499 .functionality = selftest_i2c_functionality,
1500 };
1501
1502 static int selftest_i2c_bus_probe(struct platform_device *pdev)
1503 {
1504 struct device *dev = &pdev->dev;
1505 struct device_node *np = dev->of_node;
1506 struct selftest_i2c_bus_data *std;
1507 struct i2c_adapter *adap;
1508 int ret;
1509
1510 if (np == NULL) {
1511 dev_err(dev, "No OF data for device\n");
1512 return -EINVAL;
1513
1514 }
1515
1516 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1517
1518 std = devm_kzalloc(dev, sizeof(*std), GFP_KERNEL);
1519 if (!std) {
1520 dev_err(dev, "Failed to allocate selftest i2c data\n");
1521 return -ENOMEM;
1522 }
1523
1524 /* link them together */
1525 std->pdev = pdev;
1526 platform_set_drvdata(pdev, std);
1527
1528 adap = &std->adap;
1529 i2c_set_adapdata(adap, std);
1530 adap->nr = -1;
1531 strlcpy(adap->name, pdev->name, sizeof(adap->name));
1532 adap->class = I2C_CLASS_DEPRECATED;
1533 adap->algo = &selftest_i2c_algo;
1534 adap->dev.parent = dev;
1535 adap->dev.of_node = dev->of_node;
1536 adap->timeout = 5 * HZ;
1537 adap->retries = 3;
1538
1539 ret = i2c_add_numbered_adapter(adap);
1540 if (ret != 0) {
1541 dev_err(dev, "Failed to add I2C adapter\n");
1542 return ret;
1543 }
1544
1545 return 0;
1546 }
1547
1548 static int selftest_i2c_bus_remove(struct platform_device *pdev)
1549 {
1550 struct device *dev = &pdev->dev;
1551 struct device_node *np = dev->of_node;
1552 struct selftest_i2c_bus_data *std = platform_get_drvdata(pdev);
1553
1554 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1555 i2c_del_adapter(&std->adap);
1556
1557 return 0;
1558 }
1559
1560 static const struct of_device_id selftest_i2c_bus_match[] = {
1561 { .compatible = "selftest-i2c-bus", },
1562 {},
1563 };
1564
1565 static struct platform_driver selftest_i2c_bus_driver = {
1566 .probe = selftest_i2c_bus_probe,
1567 .remove = selftest_i2c_bus_remove,
1568 .driver = {
1569 .name = "selftest-i2c-bus",
1570 .of_match_table = of_match_ptr(selftest_i2c_bus_match),
1571 },
1572 };
1573
1574 static int selftest_i2c_dev_probe(struct i2c_client *client,
1575 const struct i2c_device_id *id)
1576 {
1577 struct device *dev = &client->dev;
1578 struct device_node *np = client->dev.of_node;
1579
1580 if (!np) {
1581 dev_err(dev, "No OF node\n");
1582 return -EINVAL;
1583 }
1584
1585 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1586
1587 return 0;
1588 };
1589
1590 static int selftest_i2c_dev_remove(struct i2c_client *client)
1591 {
1592 struct device *dev = &client->dev;
1593 struct device_node *np = client->dev.of_node;
1594
1595 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1596 return 0;
1597 }
1598
1599 static const struct i2c_device_id selftest_i2c_dev_id[] = {
1600 { .name = "selftest-i2c-dev" },
1601 { }
1602 };
1603
1604 static struct i2c_driver selftest_i2c_dev_driver = {
1605 .driver = {
1606 .name = "selftest-i2c-dev",
1607 .owner = THIS_MODULE,
1608 },
1609 .probe = selftest_i2c_dev_probe,
1610 .remove = selftest_i2c_dev_remove,
1611 .id_table = selftest_i2c_dev_id,
1612 };
1613
1614 #if IS_BUILTIN(CONFIG_I2C_MUX)
1615
1616 struct selftest_i2c_mux_data {
1617 int nchans;
1618 struct i2c_adapter *adap[];
1619 };
1620
1621 static int selftest_i2c_mux_select_chan(struct i2c_adapter *adap,
1622 void *client, u32 chan)
1623 {
1624 return 0;
1625 }
1626
1627 static int selftest_i2c_mux_probe(struct i2c_client *client,
1628 const struct i2c_device_id *id)
1629 {
1630 int ret, i, nchans, size;
1631 struct device *dev = &client->dev;
1632 struct i2c_adapter *adap = to_i2c_adapter(dev->parent);
1633 struct device_node *np = client->dev.of_node, *child;
1634 struct selftest_i2c_mux_data *stm;
1635 u32 reg, max_reg;
1636
1637 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1638
1639 if (!np) {
1640 dev_err(dev, "No OF node\n");
1641 return -EINVAL;
1642 }
1643
1644 max_reg = (u32)-1;
1645 for_each_child_of_node(np, child) {
1646 ret = of_property_read_u32(child, "reg", &reg);
1647 if (ret)
1648 continue;
1649 if (max_reg == (u32)-1 || reg > max_reg)
1650 max_reg = reg;
1651 }
1652 nchans = max_reg == (u32)-1 ? 0 : max_reg + 1;
1653 if (nchans == 0) {
1654 dev_err(dev, "No channels\n");
1655 return -EINVAL;
1656 }
1657
1658 size = offsetof(struct selftest_i2c_mux_data, adap[nchans]);
1659 stm = devm_kzalloc(dev, size, GFP_KERNEL);
1660 if (!stm) {
1661 dev_err(dev, "Out of memory\n");
1662 return -ENOMEM;
1663 }
1664 stm->nchans = nchans;
1665 for (i = 0; i < nchans; i++) {
1666 stm->adap[i] = i2c_add_mux_adapter(adap, dev, client,
1667 0, i, 0, selftest_i2c_mux_select_chan, NULL);
1668 if (!stm->adap[i]) {
1669 dev_err(dev, "Failed to register mux #%d\n", i);
1670 for (i--; i >= 0; i--)
1671 i2c_del_mux_adapter(stm->adap[i]);
1672 return -ENODEV;
1673 }
1674 }
1675
1676 i2c_set_clientdata(client, stm);
1677
1678 return 0;
1679 };
1680
1681 static int selftest_i2c_mux_remove(struct i2c_client *client)
1682 {
1683 struct device *dev = &client->dev;
1684 struct device_node *np = client->dev.of_node;
1685 struct selftest_i2c_mux_data *stm = i2c_get_clientdata(client);
1686 int i;
1687
1688 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1689 for (i = stm->nchans - 1; i >= 0; i--)
1690 i2c_del_mux_adapter(stm->adap[i]);
1691 return 0;
1692 }
1693
1694 static const struct i2c_device_id selftest_i2c_mux_id[] = {
1695 { .name = "selftest-i2c-mux" },
1696 { }
1697 };
1698
1699 static struct i2c_driver selftest_i2c_mux_driver = {
1700 .driver = {
1701 .name = "selftest-i2c-mux",
1702 .owner = THIS_MODULE,
1703 },
1704 .probe = selftest_i2c_mux_probe,
1705 .remove = selftest_i2c_mux_remove,
1706 .id_table = selftest_i2c_mux_id,
1707 };
1708
1709 #endif
1710
1711 static int of_selftest_overlay_i2c_init(void)
1712 {
1713 int ret;
1714
1715 ret = i2c_add_driver(&selftest_i2c_dev_driver);
1716 if (selftest(ret == 0,
1717 "could not register selftest i2c device driver\n"))
1718 return ret;
1719
1720 ret = platform_driver_register(&selftest_i2c_bus_driver);
1721 if (selftest(ret == 0,
1722 "could not register selftest i2c bus driver\n"))
1723 return ret;
1724
1725 #if IS_BUILTIN(CONFIG_I2C_MUX)
1726 ret = i2c_add_driver(&selftest_i2c_mux_driver);
1727 if (selftest(ret == 0,
1728 "could not register selftest i2c mux driver\n"))
1729 return ret;
1730 #endif
1731
1732 return 0;
1733 }
1734
1735 static void of_selftest_overlay_i2c_cleanup(void)
1736 {
1737 #if IS_BUILTIN(CONFIG_I2C_MUX)
1738 i2c_del_driver(&selftest_i2c_mux_driver);
1739 #endif
1740 platform_driver_unregister(&selftest_i2c_bus_driver);
1741 i2c_del_driver(&selftest_i2c_dev_driver);
1742 }
1743
1744 static void of_selftest_overlay_i2c_12(void)
1745 {
1746 int ret;
1747
1748 /* device should enable */
1749 ret = of_selftest_apply_overlay_check(12, 12, 0, 1, I2C_OVERLAY);
1750 if (ret != 0)
1751 return;
1752
1753 selftest(1, "overlay test %d passed\n", 12);
1754 }
1755
1756 /* test deactivation of device */
1757 static void of_selftest_overlay_i2c_13(void)
1758 {
1759 int ret;
1760
1761 /* device should disable */
1762 ret = of_selftest_apply_overlay_check(13, 13, 1, 0, I2C_OVERLAY);
1763 if (ret != 0)
1764 return;
1765
1766 selftest(1, "overlay test %d passed\n", 13);
1767 }
1768
1769 /* just check for i2c mux existence */
1770 static void of_selftest_overlay_i2c_14(void)
1771 {
1772 }
1773
1774 static void of_selftest_overlay_i2c_15(void)
1775 {
1776 int ret;
1777
1778 /* device should enable */
1779 ret = of_selftest_apply_overlay_check(16, 15, 0, 1, I2C_OVERLAY);
1780 if (ret != 0)
1781 return;
1782
1783 selftest(1, "overlay test %d passed\n", 15);
1784 }
1785
1786 #else
1787
1788 static inline void of_selftest_overlay_i2c_14(void) { }
1789 static inline void of_selftest_overlay_i2c_15(void) { }
1790
1791 #endif
1792
1793 static void __init of_selftest_overlay(void)
1794 {
1795 struct device_node *bus_np = NULL;
1796 int ret;
1797
1798 ret = platform_driver_register(&selftest_driver);
1799 if (ret != 0) {
1800 selftest(0, "could not register selftest driver\n");
1801 goto out;
1802 }
1803
1804 bus_np = of_find_node_by_path(bus_path);
1805 if (bus_np == NULL) {
1806 selftest(0, "could not find bus_path \"%s\"\n", bus_path);
1807 goto out;
1808 }
1809
1810 ret = of_platform_populate(bus_np, of_default_bus_match_table,
1811 NULL, NULL);
1812 if (ret != 0) {
1813 selftest(0, "could not populate bus @ \"%s\"\n", bus_path);
1814 goto out;
1815 }
1816
1817 if (!of_selftest_device_exists(100, PDEV_OVERLAY)) {
1818 selftest(0, "could not find selftest0 @ \"%s\"\n",
1819 selftest_path(100, PDEV_OVERLAY));
1820 goto out;
1821 }
1822
1823 if (of_selftest_device_exists(101, PDEV_OVERLAY)) {
1824 selftest(0, "selftest1 @ \"%s\" should not exist\n",
1825 selftest_path(101, PDEV_OVERLAY));
1826 goto out;
1827 }
1828
1829 selftest(1, "basic infrastructure of overlays passed");
1830
1831 /* tests in sequence */
1832 of_selftest_overlay_0();
1833 of_selftest_overlay_1();
1834 of_selftest_overlay_2();
1835 of_selftest_overlay_3();
1836 of_selftest_overlay_4();
1837 of_selftest_overlay_5();
1838 of_selftest_overlay_6();
1839 of_selftest_overlay_8();
1840
1841 of_selftest_overlay_10();
1842 of_selftest_overlay_11();
1843
1844 #if IS_BUILTIN(CONFIG_I2C)
1845 if (selftest(of_selftest_overlay_i2c_init() == 0, "i2c init failed\n"))
1846 goto out;
1847
1848 of_selftest_overlay_i2c_12();
1849 of_selftest_overlay_i2c_13();
1850 of_selftest_overlay_i2c_14();
1851 of_selftest_overlay_i2c_15();
1852
1853 of_selftest_overlay_i2c_cleanup();
1854 #endif
1855
1856 out:
1857 of_node_put(bus_np);
1858 }
1859
1860 #else
1861 static inline void __init of_selftest_overlay(void) { }
1862 #endif
1863
1864 static int __init of_selftest(void)
1865 {
1866 struct device_node *np;
1867 int res;
1868
1869 /* adding data for selftest */
1870 res = selftest_data_add();
1871 if (res)
1872 return res;
1873 if (!of_aliases)
1874 of_aliases = of_find_node_by_path("/aliases");
1875
1876 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
1877 if (!np) {
1878 pr_info("No testcase data in device tree; not running tests\n");
1879 return 0;
1880 }
1881 of_node_put(np);
1882
1883 pr_info("start of selftest - you will see error messages\n");
1884 of_selftest_check_tree_linkage();
1885 of_selftest_check_phandles();
1886 of_selftest_find_node_by_name();
1887 of_selftest_dynamic();
1888 of_selftest_parse_phandle_with_args();
1889 of_selftest_property_string();
1890 of_selftest_property_copy();
1891 of_selftest_changeset();
1892 of_selftest_parse_interrupts();
1893 of_selftest_parse_interrupts_extended();
1894 of_selftest_match_node();
1895 of_selftest_platform_populate();
1896 of_selftest_overlay();
1897
1898 /* Double check linkage after removing testcase data */
1899 of_selftest_check_tree_linkage();
1900
1901 pr_info("end of selftest - %i passed, %i failed\n",
1902 selftest_results.passed, selftest_results.failed);
1903
1904 return 0;
1905 }
1906 late_initcall(of_selftest);
Linux with added FPC-III support