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Commit | Line | Data |
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53a42093 GL |
1 | /* |
2 | * Self tests for device tree subsystem | |
3 | */ | |
4 | ||
cabb7d5b | 5 | #define pr_fmt(fmt) "### dt-test ### " fmt |
53a42093 GL |
6 | |
7 | #include <linux/clk.h> | |
8 | #include <linux/err.h> | |
9 | #include <linux/errno.h> | |
10 | #include <linux/module.h> | |
11 | #include <linux/of.h> | |
a9f10ca7 | 12 | #include <linux/of_irq.h> |
82c0f589 | 13 | #include <linux/of_platform.h> |
53a42093 GL |
14 | #include <linux/list.h> |
15 | #include <linux/mutex.h> | |
16 | #include <linux/slab.h> | |
17 | #include <linux/device.h> | |
18 | ||
a9f10ca7 GL |
19 | static struct selftest_results { |
20 | int passed; | |
21 | int failed; | |
22 | } selftest_results; | |
23 | ||
53a42093 | 24 | #define selftest(result, fmt, ...) { \ |
cabb7d5b | 25 | if (!(result)) { \ |
a9f10ca7 GL |
26 | selftest_results.failed++; \ |
27 | pr_err("FAIL %s():%i " fmt, __func__, __LINE__, ##__VA_ARGS__); \ | |
cabb7d5b | 28 | } else { \ |
a9f10ca7 GL |
29 | selftest_results.passed++; \ |
30 | pr_debug("pass %s():%i\n", __func__, __LINE__); \ | |
cabb7d5b | 31 | } \ |
53a42093 GL |
32 | } |
33 | ||
7e66c5c7 GL |
34 | static void __init of_selftest_dynamic(void) |
35 | { | |
36 | struct device_node *np; | |
37 | struct property *prop; | |
38 | ||
39 | np = of_find_node_by_path("/testcase-data"); | |
40 | if (!np) { | |
41 | pr_err("missing testcase data\n"); | |
42 | return; | |
43 | } | |
44 | ||
45 | /* Array of 4 properties for the purpose of testing */ | |
46 | prop = kzalloc(sizeof(*prop) * 4, GFP_KERNEL); | |
47 | if (!prop) { | |
48 | selftest(0, "kzalloc() failed\n"); | |
49 | return; | |
50 | } | |
51 | ||
52 | /* Add a new property - should pass*/ | |
53 | prop->name = "new-property"; | |
54 | prop->value = "new-property-data"; | |
55 | prop->length = strlen(prop->value); | |
56 | selftest(of_add_property(np, prop) == 0, "Adding a new property failed\n"); | |
57 | ||
58 | /* Try to add an existing property - should fail */ | |
59 | prop++; | |
60 | prop->name = "new-property"; | |
61 | prop->value = "new-property-data-should-fail"; | |
62 | prop->length = strlen(prop->value); | |
63 | selftest(of_add_property(np, prop) != 0, | |
64 | "Adding an existing property should have failed\n"); | |
65 | ||
66 | /* Try to modify an existing property - should pass */ | |
67 | prop->value = "modify-property-data-should-pass"; | |
68 | prop->length = strlen(prop->value); | |
69 | selftest(of_update_property(np, prop) == 0, | |
70 | "Updating an existing property should have passed\n"); | |
71 | ||
72 | /* Try to modify non-existent property - should pass*/ | |
73 | prop++; | |
74 | prop->name = "modify-property"; | |
75 | prop->value = "modify-missing-property-data-should-pass"; | |
76 | prop->length = strlen(prop->value); | |
77 | selftest(of_update_property(np, prop) == 0, | |
78 | "Updating a missing property should have passed\n"); | |
79 | ||
80 | /* Remove property - should pass */ | |
81 | selftest(of_remove_property(np, prop) == 0, | |
82 | "Removing a property should have passed\n"); | |
83 | ||
84 | /* Adding very large property - should pass */ | |
85 | prop++; | |
86 | prop->name = "large-property-PAGE_SIZEx8"; | |
87 | prop->length = PAGE_SIZE * 8; | |
88 | prop->value = kzalloc(prop->length, GFP_KERNEL); | |
89 | selftest(prop->value != NULL, "Unable to allocate large buffer\n"); | |
90 | if (prop->value) | |
91 | selftest(of_add_property(np, prop) == 0, | |
92 | "Adding a large property should have passed\n"); | |
93 | } | |
94 | ||
53a42093 GL |
95 | static void __init of_selftest_parse_phandle_with_args(void) |
96 | { | |
97 | struct device_node *np; | |
98 | struct of_phandle_args args; | |
cabb7d5b | 99 | int i, rc; |
53a42093 | 100 | |
53a42093 GL |
101 | np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); |
102 | if (!np) { | |
103 | pr_err("missing testcase data\n"); | |
104 | return; | |
105 | } | |
106 | ||
bd69f73f GL |
107 | rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells"); |
108 | selftest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc); | |
109 | ||
f7f951c2 | 110 | for (i = 0; i < 8; i++) { |
53a42093 GL |
111 | bool passed = true; |
112 | rc = of_parse_phandle_with_args(np, "phandle-list", | |
113 | "#phandle-cells", i, &args); | |
114 | ||
115 | /* Test the values from tests-phandle.dtsi */ | |
116 | switch (i) { | |
117 | case 0: | |
118 | passed &= !rc; | |
119 | passed &= (args.args_count == 1); | |
120 | passed &= (args.args[0] == (i + 1)); | |
121 | break; | |
122 | case 1: | |
123 | passed &= !rc; | |
124 | passed &= (args.args_count == 2); | |
125 | passed &= (args.args[0] == (i + 1)); | |
126 | passed &= (args.args[1] == 0); | |
127 | break; | |
128 | case 2: | |
129 | passed &= (rc == -ENOENT); | |
130 | break; | |
131 | case 3: | |
132 | passed &= !rc; | |
133 | passed &= (args.args_count == 3); | |
134 | passed &= (args.args[0] == (i + 1)); | |
135 | passed &= (args.args[1] == 4); | |
136 | passed &= (args.args[2] == 3); | |
137 | break; | |
138 | case 4: | |
139 | passed &= !rc; | |
140 | passed &= (args.args_count == 2); | |
141 | passed &= (args.args[0] == (i + 1)); | |
142 | passed &= (args.args[1] == 100); | |
143 | break; | |
144 | case 5: | |
145 | passed &= !rc; | |
146 | passed &= (args.args_count == 0); | |
147 | break; | |
148 | case 6: | |
149 | passed &= !rc; | |
150 | passed &= (args.args_count == 1); | |
151 | passed &= (args.args[0] == (i + 1)); | |
152 | break; | |
153 | case 7: | |
cabb7d5b | 154 | passed &= (rc == -ENOENT); |
53a42093 GL |
155 | break; |
156 | default: | |
157 | passed = false; | |
158 | } | |
159 | ||
cabb7d5b GL |
160 | selftest(passed, "index %i - data error on node %s rc=%i\n", |
161 | i, args.np->full_name, rc); | |
53a42093 GL |
162 | } |
163 | ||
164 | /* Check for missing list property */ | |
165 | rc = of_parse_phandle_with_args(np, "phandle-list-missing", | |
166 | "#phandle-cells", 0, &args); | |
cabb7d5b | 167 | selftest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc); |
bd69f73f GL |
168 | rc = of_count_phandle_with_args(np, "phandle-list-missing", |
169 | "#phandle-cells"); | |
170 | selftest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc); | |
53a42093 GL |
171 | |
172 | /* Check for missing cells property */ | |
173 | rc = of_parse_phandle_with_args(np, "phandle-list", | |
174 | "#phandle-cells-missing", 0, &args); | |
cabb7d5b | 175 | selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); |
bd69f73f GL |
176 | rc = of_count_phandle_with_args(np, "phandle-list", |
177 | "#phandle-cells-missing"); | |
178 | selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); | |
53a42093 GL |
179 | |
180 | /* Check for bad phandle in list */ | |
181 | rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle", | |
182 | "#phandle-cells", 0, &args); | |
cabb7d5b | 183 | selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); |
bd69f73f GL |
184 | rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle", |
185 | "#phandle-cells"); | |
186 | selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); | |
53a42093 GL |
187 | |
188 | /* Check for incorrectly formed argument list */ | |
189 | rc = of_parse_phandle_with_args(np, "phandle-list-bad-args", | |
190 | "#phandle-cells", 1, &args); | |
cabb7d5b | 191 | selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); |
bd69f73f GL |
192 | rc = of_count_phandle_with_args(np, "phandle-list-bad-args", |
193 | "#phandle-cells"); | |
194 | selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc); | |
53a42093 GL |
195 | } |
196 | ||
7aff0fe3 GL |
197 | static void __init of_selftest_property_match_string(void) |
198 | { | |
199 | struct device_node *np; | |
200 | int rc; | |
201 | ||
7aff0fe3 GL |
202 | np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); |
203 | if (!np) { | |
204 | pr_err("No testcase data in device tree\n"); | |
205 | return; | |
206 | } | |
207 | ||
208 | rc = of_property_match_string(np, "phandle-list-names", "first"); | |
209 | selftest(rc == 0, "first expected:0 got:%i\n", rc); | |
210 | rc = of_property_match_string(np, "phandle-list-names", "second"); | |
211 | selftest(rc == 1, "second expected:0 got:%i\n", rc); | |
212 | rc = of_property_match_string(np, "phandle-list-names", "third"); | |
213 | selftest(rc == 2, "third expected:0 got:%i\n", rc); | |
214 | rc = of_property_match_string(np, "phandle-list-names", "fourth"); | |
215 | selftest(rc == -ENODATA, "unmatched string; rc=%i", rc); | |
216 | rc = of_property_match_string(np, "missing-property", "blah"); | |
217 | selftest(rc == -EINVAL, "missing property; rc=%i", rc); | |
218 | rc = of_property_match_string(np, "empty-property", "blah"); | |
219 | selftest(rc == -ENODATA, "empty property; rc=%i", rc); | |
220 | rc = of_property_match_string(np, "unterminated-string", "blah"); | |
221 | selftest(rc == -EILSEQ, "unterminated string; rc=%i", rc); | |
222 | } | |
223 | ||
a9f10ca7 GL |
224 | static void __init of_selftest_parse_interrupts(void) |
225 | { | |
226 | struct device_node *np; | |
227 | struct of_phandle_args args; | |
228 | int i, rc; | |
229 | ||
230 | np = of_find_node_by_path("/testcase-data/interrupts/interrupts0"); | |
231 | if (!np) { | |
232 | pr_err("missing testcase data\n"); | |
233 | return; | |
234 | } | |
235 | ||
236 | for (i = 0; i < 4; i++) { | |
237 | bool passed = true; | |
238 | args.args_count = 0; | |
239 | rc = of_irq_parse_one(np, i, &args); | |
240 | ||
241 | passed &= !rc; | |
242 | passed &= (args.args_count == 1); | |
243 | passed &= (args.args[0] == (i + 1)); | |
244 | ||
245 | selftest(passed, "index %i - data error on node %s rc=%i\n", | |
246 | i, args.np->full_name, rc); | |
247 | } | |
248 | of_node_put(np); | |
249 | ||
250 | np = of_find_node_by_path("/testcase-data/interrupts/interrupts1"); | |
251 | if (!np) { | |
252 | pr_err("missing testcase data\n"); | |
253 | return; | |
254 | } | |
255 | ||
256 | for (i = 0; i < 4; i++) { | |
257 | bool passed = true; | |
258 | args.args_count = 0; | |
259 | rc = of_irq_parse_one(np, i, &args); | |
260 | ||
261 | /* Test the values from tests-phandle.dtsi */ | |
262 | switch (i) { | |
263 | case 0: | |
264 | passed &= !rc; | |
265 | passed &= (args.args_count == 1); | |
266 | passed &= (args.args[0] == 9); | |
267 | break; | |
268 | case 1: | |
269 | passed &= !rc; | |
270 | passed &= (args.args_count == 3); | |
271 | passed &= (args.args[0] == 10); | |
272 | passed &= (args.args[1] == 11); | |
273 | passed &= (args.args[2] == 12); | |
274 | break; | |
275 | case 2: | |
276 | passed &= !rc; | |
277 | passed &= (args.args_count == 2); | |
278 | passed &= (args.args[0] == 13); | |
279 | passed &= (args.args[1] == 14); | |
280 | break; | |
281 | case 3: | |
282 | passed &= !rc; | |
283 | passed &= (args.args_count == 2); | |
284 | passed &= (args.args[0] == 15); | |
285 | passed &= (args.args[1] == 16); | |
286 | break; | |
287 | default: | |
288 | passed = false; | |
289 | } | |
290 | selftest(passed, "index %i - data error on node %s rc=%i\n", | |
291 | i, args.np->full_name, rc); | |
292 | } | |
293 | of_node_put(np); | |
294 | } | |
295 | ||
79d97015 GL |
296 | static void __init of_selftest_parse_interrupts_extended(void) |
297 | { | |
298 | struct device_node *np; | |
299 | struct of_phandle_args args; | |
300 | int i, rc; | |
301 | ||
302 | np = of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0"); | |
303 | if (!np) { | |
304 | pr_err("missing testcase data\n"); | |
305 | return; | |
306 | } | |
307 | ||
308 | for (i = 0; i < 7; i++) { | |
309 | bool passed = true; | |
310 | rc = of_irq_parse_one(np, i, &args); | |
311 | ||
312 | /* Test the values from tests-phandle.dtsi */ | |
313 | switch (i) { | |
314 | case 0: | |
315 | passed &= !rc; | |
316 | passed &= (args.args_count == 1); | |
317 | passed &= (args.args[0] == 1); | |
318 | break; | |
319 | case 1: | |
320 | passed &= !rc; | |
321 | passed &= (args.args_count == 3); | |
322 | passed &= (args.args[0] == 2); | |
323 | passed &= (args.args[1] == 3); | |
324 | passed &= (args.args[2] == 4); | |
325 | break; | |
326 | case 2: | |
327 | passed &= !rc; | |
328 | passed &= (args.args_count == 2); | |
329 | passed &= (args.args[0] == 5); | |
330 | passed &= (args.args[1] == 6); | |
331 | break; | |
332 | case 3: | |
333 | passed &= !rc; | |
334 | passed &= (args.args_count == 1); | |
335 | passed &= (args.args[0] == 9); | |
336 | break; | |
337 | case 4: | |
338 | passed &= !rc; | |
339 | passed &= (args.args_count == 3); | |
340 | passed &= (args.args[0] == 10); | |
341 | passed &= (args.args[1] == 11); | |
342 | passed &= (args.args[2] == 12); | |
343 | break; | |
344 | case 5: | |
345 | passed &= !rc; | |
346 | passed &= (args.args_count == 2); | |
347 | passed &= (args.args[0] == 13); | |
348 | passed &= (args.args[1] == 14); | |
349 | break; | |
350 | case 6: | |
351 | passed &= !rc; | |
352 | passed &= (args.args_count == 1); | |
353 | passed &= (args.args[0] == 15); | |
354 | break; | |
355 | default: | |
356 | passed = false; | |
357 | } | |
358 | ||
359 | selftest(passed, "index %i - data error on node %s rc=%i\n", | |
360 | i, args.np->full_name, rc); | |
361 | } | |
362 | of_node_put(np); | |
363 | } | |
364 | ||
1f42e5dd GL |
365 | static struct of_device_id match_node_table[] = { |
366 | { .data = "A", .name = "name0", }, /* Name alone is lowest priority */ | |
367 | { .data = "B", .type = "type1", }, /* followed by type alone */ | |
368 | ||
369 | { .data = "Ca", .name = "name2", .type = "type1", }, /* followed by both together */ | |
370 | { .data = "Cb", .name = "name2", }, /* Only match when type doesn't match */ | |
371 | { .data = "Cc", .name = "name2", .type = "type2", }, | |
372 | ||
373 | { .data = "E", .compatible = "compat3" }, | |
374 | { .data = "G", .compatible = "compat2", }, | |
375 | { .data = "H", .compatible = "compat2", .name = "name5", }, | |
376 | { .data = "I", .compatible = "compat2", .type = "type1", }, | |
377 | { .data = "J", .compatible = "compat2", .type = "type1", .name = "name8", }, | |
378 | { .data = "K", .compatible = "compat2", .name = "name9", }, | |
379 | {} | |
380 | }; | |
381 | ||
382 | static struct { | |
383 | const char *path; | |
384 | const char *data; | |
385 | } match_node_tests[] = { | |
386 | { .path = "/testcase-data/match-node/name0", .data = "A", }, | |
387 | { .path = "/testcase-data/match-node/name1", .data = "B", }, | |
388 | { .path = "/testcase-data/match-node/a/name2", .data = "Ca", }, | |
389 | { .path = "/testcase-data/match-node/b/name2", .data = "Cb", }, | |
390 | { .path = "/testcase-data/match-node/c/name2", .data = "Cc", }, | |
391 | { .path = "/testcase-data/match-node/name3", .data = "E", }, | |
392 | { .path = "/testcase-data/match-node/name4", .data = "G", }, | |
393 | { .path = "/testcase-data/match-node/name5", .data = "H", }, | |
394 | { .path = "/testcase-data/match-node/name6", .data = "G", }, | |
395 | { .path = "/testcase-data/match-node/name7", .data = "I", }, | |
396 | { .path = "/testcase-data/match-node/name8", .data = "J", }, | |
397 | { .path = "/testcase-data/match-node/name9", .data = "K", }, | |
398 | }; | |
399 | ||
400 | static void __init of_selftest_match_node(void) | |
401 | { | |
402 | struct device_node *np; | |
403 | const struct of_device_id *match; | |
404 | int i; | |
405 | ||
406 | for (i = 0; i < ARRAY_SIZE(match_node_tests); i++) { | |
407 | np = of_find_node_by_path(match_node_tests[i].path); | |
408 | if (!np) { | |
409 | selftest(0, "missing testcase node %s\n", | |
410 | match_node_tests[i].path); | |
411 | continue; | |
412 | } | |
413 | ||
414 | match = of_match_node(match_node_table, np); | |
415 | if (!match) { | |
416 | selftest(0, "%s didn't match anything\n", | |
417 | match_node_tests[i].path); | |
418 | continue; | |
419 | } | |
420 | ||
421 | if (strcmp(match->data, match_node_tests[i].data) != 0) { | |
422 | selftest(0, "%s got wrong match. expected %s, got %s\n", | |
423 | match_node_tests[i].path, match_node_tests[i].data, | |
424 | (const char *)match->data); | |
425 | continue; | |
426 | } | |
427 | selftest(1, "passed"); | |
428 | } | |
429 | } | |
430 | ||
82c0f589 RH |
431 | static void __init of_selftest_platform_populate(void) |
432 | { | |
433 | int irq; | |
434 | struct device_node *np; | |
435 | struct platform_device *pdev; | |
436 | ||
437 | np = of_find_node_by_path("/testcase-data"); | |
438 | of_platform_populate(np, of_default_bus_match_table, NULL, NULL); | |
439 | ||
440 | /* Test that a missing irq domain returns -EPROBE_DEFER */ | |
441 | np = of_find_node_by_path("/testcase-data/testcase-device1"); | |
442 | pdev = of_find_device_by_node(np); | |
7d1cdc89 RH |
443 | selftest(pdev, "device 1 creation failed\n"); |
444 | ||
82c0f589 | 445 | irq = platform_get_irq(pdev, 0); |
7d1cdc89 | 446 | selftest(irq == -EPROBE_DEFER, "device deferred probe failed - %d\n", irq); |
82c0f589 RH |
447 | |
448 | /* Test that a parsing failure does not return -EPROBE_DEFER */ | |
449 | np = of_find_node_by_path("/testcase-data/testcase-device2"); | |
450 | pdev = of_find_device_by_node(np); | |
7d1cdc89 | 451 | selftest(pdev, "device 2 creation failed\n"); |
82c0f589 | 452 | irq = platform_get_irq(pdev, 0); |
7d1cdc89 | 453 | selftest(irq < 0 && irq != -EPROBE_DEFER, "device parsing error failed - %d\n", irq); |
82c0f589 | 454 | |
82c0f589 RH |
455 | } |
456 | ||
53a42093 GL |
457 | static int __init of_selftest(void) |
458 | { | |
459 | struct device_node *np; | |
460 | ||
461 | np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); | |
462 | if (!np) { | |
463 | pr_info("No testcase data in device tree; not running tests\n"); | |
464 | return 0; | |
465 | } | |
466 | of_node_put(np); | |
467 | ||
468 | pr_info("start of selftest - you will see error messages\n"); | |
7e66c5c7 | 469 | of_selftest_dynamic(); |
53a42093 | 470 | of_selftest_parse_phandle_with_args(); |
7aff0fe3 | 471 | of_selftest_property_match_string(); |
a9f10ca7 | 472 | of_selftest_parse_interrupts(); |
79d97015 | 473 | of_selftest_parse_interrupts_extended(); |
1f42e5dd | 474 | of_selftest_match_node(); |
82c0f589 | 475 | of_selftest_platform_populate(); |
a9f10ca7 GL |
476 | pr_info("end of selftest - %i passed, %i failed\n", |
477 | selftest_results.passed, selftest_results.failed); | |
53a42093 GL |
478 | return 0; |
479 | } | |
480 | late_initcall(of_selftest); |