blob: 52c45c7df07ff6623c7fb7656961f8bdcf804da3 [file] [log] [blame]
Grant Likely53a42092011-12-12 09:25:57 -07001/*
2 * Self tests for device tree subsystem
3 */
4
Grant Likelycabb7d52013-02-12 21:19:37 +00005#define pr_fmt(fmt) "### dt-test ### " fmt
Grant Likely53a42092011-12-12 09:25:57 -07006
7#include <linux/clk.h>
8#include <linux/err.h>
9#include <linux/errno.h>
Grant Likely841ec212014-10-02 13:09:15 +010010#include <linux/hashtable.h>
Grant Likely53a42092011-12-12 09:25:57 -070011#include <linux/module.h>
12#include <linux/of.h>
Gaurav Minochaae9304c2014-07-16 23:09:39 -070013#include <linux/of_fdt.h>
Grant Likelya9f10ca2013-10-11 22:04:23 +010014#include <linux/of_irq.h>
Rob Herring82c0f582014-04-23 17:57:40 -050015#include <linux/of_platform.h>
Grant Likely53a42092011-12-12 09:25:57 -070016#include <linux/list.h>
17#include <linux/mutex.h>
18#include <linux/slab.h>
19#include <linux/device.h>
Pantelis Antoniou177d2712014-10-28 22:35:59 +020020#include <linux/platform_device.h>
21#include <linux/of_platform.h>
Grant Likely53a42092011-12-12 09:25:57 -070022
Pantelis Antonioud5e75502015-01-12 19:02:49 +020023#include <linux/i2c.h>
24#include <linux/i2c-mux.h>
25
Pantelis Antoniou69843392014-07-04 19:58:47 +030026#include "of_private.h"
27
Grant Likelya9f10ca2013-10-11 22:04:23 +010028static struct selftest_results {
29 int passed;
30 int failed;
31} selftest_results;
32
Grant Likely851da972014-11-04 13:14:13 +000033#define selftest(result, fmt, ...) ({ \
34 bool failed = !(result); \
35 if (failed) { \
Grant Likelya9f10ca2013-10-11 22:04:23 +010036 selftest_results.failed++; \
37 pr_err("FAIL %s():%i " fmt, __func__, __LINE__, ##__VA_ARGS__); \
Grant Likelycabb7d52013-02-12 21:19:37 +000038 } else { \
Grant Likelya9f10ca2013-10-11 22:04:23 +010039 selftest_results.passed++; \
40 pr_debug("pass %s():%i\n", __func__, __LINE__); \
Grant Likelycabb7d52013-02-12 21:19:37 +000041 } \
Grant Likely851da972014-11-04 13:14:13 +000042 failed; \
43})
Grant Likely53a42092011-12-12 09:25:57 -070044
Grant Likelyae91ff72014-03-14 13:53:10 +000045static void __init of_selftest_find_node_by_name(void)
46{
47 struct device_node *np;
Leif Lindholm75c28c02014-11-28 11:34:28 +000048 const char *options;
Grant Likelyae91ff72014-03-14 13:53:10 +000049
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);
Leif Lindholm75c28c02014-11-28 11:34:28 +000089
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
Peter Hurley8cbba1a2015-03-06 13:59:59 -050095 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
Brian Norris5ca1b0d2015-03-17 12:30:32 -0700100 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
Leif Lindholm75c28c02014-11-28 11:34:28 +0000105 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
Peter Hurley8cbba1a2015-03-06 13:59:59 -0500115 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
Leif Lindholm75c28c02014-11-28 11:34:28 +0000121 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);
Grant Likelyae91ff72014-03-14 13:53:10 +0000134}
135
Grant Likely7e66c5c2013-11-15 17:19:09 +0000136static 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
Grant Likelyf2051d62014-10-01 17:40:22 +0100197static int __init of_selftest_check_node_linkage(struct device_node *np)
198{
Grant Likely5063e252014-10-03 16:28:27 +0100199 struct device_node *child;
Grant Likelyf2051d62014-10-01 17:40:22 +0100200 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
Grant Likelyf2051d62014-10-01 17:40:22 +0100209 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
218static void __init of_selftest_check_tree_linkage(void)
219{
220 struct device_node *np;
221 int allnode_count = 0, child_count;
222
Grant Likely5063e252014-10-03 16:28:27 +0100223 if (!of_root)
Grant Likelyf2051d62014-10-01 17:40:22 +0100224 return;
225
226 for_each_of_allnodes(np)
227 allnode_count++;
Grant Likely5063e252014-10-03 16:28:27 +0100228 child_count = of_selftest_check_node_linkage(of_root);
Grant Likelyf2051d62014-10-01 17:40:22 +0100229
230 selftest(child_count > 0, "Device node data structure is corrupted\n");
231 selftest(child_count == allnode_count, "allnodes list size (%i) doesn't match"
232 "sibling lists size (%i)\n", allnode_count, child_count);
233 pr_debug("allnodes list size (%i); sibling lists size (%i)\n", allnode_count, child_count);
234}
235
Grant Likely841ec212014-10-02 13:09:15 +0100236struct node_hash {
237 struct hlist_node node;
238 struct device_node *np;
239};
240
Grant Likely2118f4b2014-10-07 11:30:31 +0100241static DEFINE_HASHTABLE(phandle_ht, 8);
Grant Likely841ec212014-10-02 13:09:15 +0100242static void __init of_selftest_check_phandles(void)
243{
244 struct device_node *np;
245 struct node_hash *nh;
246 struct hlist_node *tmp;
247 int i, dup_count = 0, phandle_count = 0;
Grant Likely841ec212014-10-02 13:09:15 +0100248
Grant Likely841ec212014-10-02 13:09:15 +0100249 for_each_of_allnodes(np) {
250 if (!np->phandle)
251 continue;
252
Grant Likely2118f4b2014-10-07 11:30:31 +0100253 hash_for_each_possible(phandle_ht, nh, node, np->phandle) {
Grant Likely841ec212014-10-02 13:09:15 +0100254 if (nh->np->phandle == np->phandle) {
255 pr_info("Duplicate phandle! %i used by %s and %s\n",
256 np->phandle, nh->np->full_name, np->full_name);
257 dup_count++;
258 break;
259 }
260 }
261
262 nh = kzalloc(sizeof(*nh), GFP_KERNEL);
263 if (WARN_ON(!nh))
264 return;
265
266 nh->np = np;
Grant Likely2118f4b2014-10-07 11:30:31 +0100267 hash_add(phandle_ht, &nh->node, np->phandle);
Grant Likely841ec212014-10-02 13:09:15 +0100268 phandle_count++;
269 }
270 selftest(dup_count == 0, "Found %i duplicates in %i phandles\n",
271 dup_count, phandle_count);
272
273 /* Clean up */
Grant Likely2118f4b2014-10-07 11:30:31 +0100274 hash_for_each_safe(phandle_ht, i, tmp, nh, node) {
Grant Likely841ec212014-10-02 13:09:15 +0100275 hash_del(&nh->node);
276 kfree(nh);
277 }
278}
279
Grant Likely53a42092011-12-12 09:25:57 -0700280static void __init of_selftest_parse_phandle_with_args(void)
281{
282 struct device_node *np;
283 struct of_phandle_args args;
Grant Likelycabb7d52013-02-12 21:19:37 +0000284 int i, rc;
Grant Likely53a42092011-12-12 09:25:57 -0700285
Grant Likely53a42092011-12-12 09:25:57 -0700286 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
287 if (!np) {
288 pr_err("missing testcase data\n");
289 return;
290 }
291
Grant Likelybd69f732013-02-10 22:57:21 +0000292 rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
293 selftest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc);
294
Grant Likelyf7f951c2013-02-12 17:41:22 +0000295 for (i = 0; i < 8; i++) {
Grant Likely53a42092011-12-12 09:25:57 -0700296 bool passed = true;
297 rc = of_parse_phandle_with_args(np, "phandle-list",
298 "#phandle-cells", i, &args);
299
300 /* Test the values from tests-phandle.dtsi */
301 switch (i) {
302 case 0:
303 passed &= !rc;
304 passed &= (args.args_count == 1);
305 passed &= (args.args[0] == (i + 1));
306 break;
307 case 1:
308 passed &= !rc;
309 passed &= (args.args_count == 2);
310 passed &= (args.args[0] == (i + 1));
311 passed &= (args.args[1] == 0);
312 break;
313 case 2:
314 passed &= (rc == -ENOENT);
315 break;
316 case 3:
317 passed &= !rc;
318 passed &= (args.args_count == 3);
319 passed &= (args.args[0] == (i + 1));
320 passed &= (args.args[1] == 4);
321 passed &= (args.args[2] == 3);
322 break;
323 case 4:
324 passed &= !rc;
325 passed &= (args.args_count == 2);
326 passed &= (args.args[0] == (i + 1));
327 passed &= (args.args[1] == 100);
328 break;
329 case 5:
330 passed &= !rc;
331 passed &= (args.args_count == 0);
332 break;
333 case 6:
334 passed &= !rc;
335 passed &= (args.args_count == 1);
336 passed &= (args.args[0] == (i + 1));
337 break;
338 case 7:
Grant Likelycabb7d52013-02-12 21:19:37 +0000339 passed &= (rc == -ENOENT);
Grant Likely53a42092011-12-12 09:25:57 -0700340 break;
341 default:
342 passed = false;
343 }
344
Grant Likelycabb7d52013-02-12 21:19:37 +0000345 selftest(passed, "index %i - data error on node %s rc=%i\n",
346 i, args.np->full_name, rc);
Grant Likely53a42092011-12-12 09:25:57 -0700347 }
348
349 /* Check for missing list property */
350 rc = of_parse_phandle_with_args(np, "phandle-list-missing",
351 "#phandle-cells", 0, &args);
Grant Likelycabb7d52013-02-12 21:19:37 +0000352 selftest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
Grant Likelybd69f732013-02-10 22:57:21 +0000353 rc = of_count_phandle_with_args(np, "phandle-list-missing",
354 "#phandle-cells");
355 selftest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
Grant Likely53a42092011-12-12 09:25:57 -0700356
357 /* Check for missing cells property */
358 rc = of_parse_phandle_with_args(np, "phandle-list",
359 "#phandle-cells-missing", 0, &args);
Grant Likelycabb7d52013-02-12 21:19:37 +0000360 selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
Grant Likelybd69f732013-02-10 22:57:21 +0000361 rc = of_count_phandle_with_args(np, "phandle-list",
362 "#phandle-cells-missing");
363 selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
Grant Likely53a42092011-12-12 09:25:57 -0700364
365 /* Check for bad phandle in list */
366 rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle",
367 "#phandle-cells", 0, &args);
Grant Likelycabb7d52013-02-12 21:19:37 +0000368 selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
Grant Likelybd69f732013-02-10 22:57:21 +0000369 rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle",
370 "#phandle-cells");
371 selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
Grant Likely53a42092011-12-12 09:25:57 -0700372
373 /* Check for incorrectly formed argument list */
374 rc = of_parse_phandle_with_args(np, "phandle-list-bad-args",
375 "#phandle-cells", 1, &args);
Grant Likelycabb7d52013-02-12 21:19:37 +0000376 selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
Grant Likelybd69f732013-02-10 22:57:21 +0000377 rc = of_count_phandle_with_args(np, "phandle-list-bad-args",
378 "#phandle-cells");
379 selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
Grant Likely53a42092011-12-12 09:25:57 -0700380}
381
Grant Likelya87fa1d2014-11-03 15:15:35 +0000382static void __init of_selftest_property_string(void)
Grant Likely7aff0fe2011-12-12 09:25:58 -0700383{
Grant Likelya87fa1d2014-11-03 15:15:35 +0000384 const char *strings[4];
Grant Likely7aff0fe2011-12-12 09:25:58 -0700385 struct device_node *np;
386 int rc;
387
Grant Likely7aff0fe2011-12-12 09:25:58 -0700388 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
389 if (!np) {
390 pr_err("No testcase data in device tree\n");
391 return;
392 }
393
394 rc = of_property_match_string(np, "phandle-list-names", "first");
395 selftest(rc == 0, "first expected:0 got:%i\n", rc);
396 rc = of_property_match_string(np, "phandle-list-names", "second");
Wang Long649022e2015-03-03 03:50:38 +0000397 selftest(rc == 1, "second expected:1 got:%i\n", rc);
Grant Likely7aff0fe2011-12-12 09:25:58 -0700398 rc = of_property_match_string(np, "phandle-list-names", "third");
Wang Long649022e2015-03-03 03:50:38 +0000399 selftest(rc == 2, "third expected:2 got:%i\n", rc);
Grant Likely7aff0fe2011-12-12 09:25:58 -0700400 rc = of_property_match_string(np, "phandle-list-names", "fourth");
Grant Likelya87fa1d2014-11-03 15:15:35 +0000401 selftest(rc == -ENODATA, "unmatched string; rc=%i\n", rc);
Grant Likely7aff0fe2011-12-12 09:25:58 -0700402 rc = of_property_match_string(np, "missing-property", "blah");
Grant Likelya87fa1d2014-11-03 15:15:35 +0000403 selftest(rc == -EINVAL, "missing property; rc=%i\n", rc);
Grant Likely7aff0fe2011-12-12 09:25:58 -0700404 rc = of_property_match_string(np, "empty-property", "blah");
Grant Likelya87fa1d2014-11-03 15:15:35 +0000405 selftest(rc == -ENODATA, "empty property; rc=%i\n", rc);
Grant Likely7aff0fe2011-12-12 09:25:58 -0700406 rc = of_property_match_string(np, "unterminated-string", "blah");
Grant Likelya87fa1d2014-11-03 15:15:35 +0000407 selftest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
408
409 /* of_property_count_strings() tests */
410 rc = of_property_count_strings(np, "string-property");
411 selftest(rc == 1, "Incorrect string count; rc=%i\n", rc);
412 rc = of_property_count_strings(np, "phandle-list-names");
413 selftest(rc == 3, "Incorrect string count; rc=%i\n", rc);
414 rc = of_property_count_strings(np, "unterminated-string");
415 selftest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
416 rc = of_property_count_strings(np, "unterminated-string-list");
417 selftest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
418
419 /* of_property_read_string_index() tests */
420 rc = of_property_read_string_index(np, "string-property", 0, strings);
421 selftest(rc == 0 && !strcmp(strings[0], "foobar"), "of_property_read_string_index() failure; rc=%i\n", rc);
422 strings[0] = NULL;
423 rc = of_property_read_string_index(np, "string-property", 1, strings);
424 selftest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
425 rc = of_property_read_string_index(np, "phandle-list-names", 0, strings);
426 selftest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
427 rc = of_property_read_string_index(np, "phandle-list-names", 1, strings);
428 selftest(rc == 0 && !strcmp(strings[0], "second"), "of_property_read_string_index() failure; rc=%i\n", rc);
429 rc = of_property_read_string_index(np, "phandle-list-names", 2, strings);
430 selftest(rc == 0 && !strcmp(strings[0], "third"), "of_property_read_string_index() failure; rc=%i\n", rc);
431 strings[0] = NULL;
432 rc = of_property_read_string_index(np, "phandle-list-names", 3, strings);
433 selftest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
434 strings[0] = NULL;
435 rc = of_property_read_string_index(np, "unterminated-string", 0, strings);
436 selftest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
437 rc = of_property_read_string_index(np, "unterminated-string-list", 0, strings);
438 selftest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
439 strings[0] = NULL;
440 rc = of_property_read_string_index(np, "unterminated-string-list", 2, strings); /* should fail */
441 selftest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
442 strings[1] = NULL;
443
444 /* of_property_read_string_array() tests */
445 rc = of_property_read_string_array(np, "string-property", strings, 4);
446 selftest(rc == 1, "Incorrect string count; rc=%i\n", rc);
447 rc = of_property_read_string_array(np, "phandle-list-names", strings, 4);
448 selftest(rc == 3, "Incorrect string count; rc=%i\n", rc);
449 rc = of_property_read_string_array(np, "unterminated-string", strings, 4);
450 selftest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
451 /* -- An incorrectly formed string should cause a failure */
452 rc = of_property_read_string_array(np, "unterminated-string-list", strings, 4);
453 selftest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
454 /* -- parsing the correctly formed strings should still work: */
455 strings[2] = NULL;
456 rc = of_property_read_string_array(np, "unterminated-string-list", strings, 2);
457 selftest(rc == 2 && strings[2] == NULL, "of_property_read_string_array() failure; rc=%i\n", rc);
458 strings[1] = NULL;
459 rc = of_property_read_string_array(np, "phandle-list-names", strings, 1);
460 selftest(rc == 1 && strings[1] == NULL, "Overwrote end of string array; rc=%i, str='%s'\n", rc, strings[1]);
Grant Likely7aff0fe2011-12-12 09:25:58 -0700461}
462
Pantelis Antoniou69843392014-07-04 19:58:47 +0300463#define propcmp(p1, p2) (((p1)->length == (p2)->length) && \
464 (p1)->value && (p2)->value && \
465 !memcmp((p1)->value, (p2)->value, (p1)->length) && \
466 !strcmp((p1)->name, (p2)->name))
467static void __init of_selftest_property_copy(void)
468{
469#ifdef CONFIG_OF_DYNAMIC
470 struct property p1 = { .name = "p1", .length = 0, .value = "" };
471 struct property p2 = { .name = "p2", .length = 5, .value = "abcd" };
472 struct property *new;
473
474 new = __of_prop_dup(&p1, GFP_KERNEL);
475 selftest(new && propcmp(&p1, new), "empty property didn't copy correctly\n");
476 kfree(new->value);
477 kfree(new->name);
478 kfree(new);
479
480 new = __of_prop_dup(&p2, GFP_KERNEL);
481 selftest(new && propcmp(&p2, new), "non-empty property didn't copy correctly\n");
482 kfree(new->value);
483 kfree(new->name);
484 kfree(new);
485#endif
486}
487
Pantelis Antoniou201c9102014-07-04 19:58:49 +0300488static void __init of_selftest_changeset(void)
489{
490#ifdef CONFIG_OF_DYNAMIC
491 struct property *ppadd, padd = { .name = "prop-add", .length = 0, .value = "" };
492 struct property *ppupdate, pupdate = { .name = "prop-update", .length = 5, .value = "abcd" };
493 struct property *ppremove;
Grant Likelye5179582014-11-17 22:31:32 +0000494 struct device_node *n1, *n2, *n21, *nremove, *parent, *np;
Pantelis Antoniou201c9102014-07-04 19:58:49 +0300495 struct of_changeset chgset;
496
Grant Likelye5179582014-11-17 22:31:32 +0000497 n1 = __of_node_dup(NULL, "/testcase-data/changeset/n1");
Pantelis Antoniou201c9102014-07-04 19:58:49 +0300498 selftest(n1, "testcase setup failure\n");
Grant Likelye5179582014-11-17 22:31:32 +0000499 n2 = __of_node_dup(NULL, "/testcase-data/changeset/n2");
Pantelis Antoniou201c9102014-07-04 19:58:49 +0300500 selftest(n2, "testcase setup failure\n");
Grant Likelye5179582014-11-17 22:31:32 +0000501 n21 = __of_node_dup(NULL, "%s/%s", "/testcase-data/changeset/n2", "n21");
Pantelis Antoniou201c9102014-07-04 19:58:49 +0300502 selftest(n21, "testcase setup failure %p\n", n21);
503 nremove = of_find_node_by_path("/testcase-data/changeset/node-remove");
504 selftest(nremove, "testcase setup failure\n");
505 ppadd = __of_prop_dup(&padd, GFP_KERNEL);
506 selftest(ppadd, "testcase setup failure\n");
507 ppupdate = __of_prop_dup(&pupdate, GFP_KERNEL);
508 selftest(ppupdate, "testcase setup failure\n");
509 parent = nremove->parent;
510 n1->parent = parent;
511 n2->parent = parent;
512 n21->parent = n2;
513 n2->child = n21;
514 ppremove = of_find_property(parent, "prop-remove", NULL);
515 selftest(ppremove, "failed to find removal prop");
516
517 of_changeset_init(&chgset);
518 selftest(!of_changeset_attach_node(&chgset, n1), "fail attach n1\n");
519 selftest(!of_changeset_attach_node(&chgset, n2), "fail attach n2\n");
520 selftest(!of_changeset_detach_node(&chgset, nremove), "fail remove node\n");
521 selftest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n");
522 selftest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop\n");
523 selftest(!of_changeset_update_property(&chgset, parent, ppupdate), "fail update prop\n");
524 selftest(!of_changeset_remove_property(&chgset, parent, ppremove), "fail remove prop\n");
525 mutex_lock(&of_mutex);
526 selftest(!of_changeset_apply(&chgset), "apply failed\n");
527 mutex_unlock(&of_mutex);
528
Grant Likelye5179582014-11-17 22:31:32 +0000529 /* Make sure node names are constructed correctly */
530 selftest((np = of_find_node_by_path("/testcase-data/changeset/n2/n21")),
531 "'%s' not added\n", n21->full_name);
Markus Elfringc46ca3c2014-12-02 13:54:00 +0100532 of_node_put(np);
Grant Likelye5179582014-11-17 22:31:32 +0000533
Pantelis Antoniou201c9102014-07-04 19:58:49 +0300534 mutex_lock(&of_mutex);
535 selftest(!of_changeset_revert(&chgset), "revert failed\n");
536 mutex_unlock(&of_mutex);
537
538 of_changeset_destroy(&chgset);
539#endif
540}
541
Grant Likelya9f10ca2013-10-11 22:04:23 +0100542static void __init of_selftest_parse_interrupts(void)
543{
544 struct device_node *np;
545 struct of_phandle_args args;
546 int i, rc;
547
548 np = of_find_node_by_path("/testcase-data/interrupts/interrupts0");
549 if (!np) {
550 pr_err("missing testcase data\n");
551 return;
552 }
553
554 for (i = 0; i < 4; i++) {
555 bool passed = true;
556 args.args_count = 0;
557 rc = of_irq_parse_one(np, i, &args);
558
559 passed &= !rc;
560 passed &= (args.args_count == 1);
561 passed &= (args.args[0] == (i + 1));
562
563 selftest(passed, "index %i - data error on node %s rc=%i\n",
564 i, args.np->full_name, rc);
565 }
566 of_node_put(np);
567
568 np = of_find_node_by_path("/testcase-data/interrupts/interrupts1");
569 if (!np) {
570 pr_err("missing testcase data\n");
571 return;
572 }
573
574 for (i = 0; i < 4; i++) {
575 bool passed = true;
576 args.args_count = 0;
577 rc = of_irq_parse_one(np, i, &args);
578
579 /* Test the values from tests-phandle.dtsi */
580 switch (i) {
581 case 0:
582 passed &= !rc;
583 passed &= (args.args_count == 1);
584 passed &= (args.args[0] == 9);
585 break;
586 case 1:
587 passed &= !rc;
588 passed &= (args.args_count == 3);
589 passed &= (args.args[0] == 10);
590 passed &= (args.args[1] == 11);
591 passed &= (args.args[2] == 12);
592 break;
593 case 2:
594 passed &= !rc;
595 passed &= (args.args_count == 2);
596 passed &= (args.args[0] == 13);
597 passed &= (args.args[1] == 14);
598 break;
599 case 3:
600 passed &= !rc;
601 passed &= (args.args_count == 2);
602 passed &= (args.args[0] == 15);
603 passed &= (args.args[1] == 16);
604 break;
605 default:
606 passed = false;
607 }
608 selftest(passed, "index %i - data error on node %s rc=%i\n",
609 i, args.np->full_name, rc);
610 }
611 of_node_put(np);
612}
613
Grant Likely79d97012013-09-19 16:47:37 -0500614static void __init of_selftest_parse_interrupts_extended(void)
615{
616 struct device_node *np;
617 struct of_phandle_args args;
618 int i, rc;
619
620 np = of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0");
621 if (!np) {
622 pr_err("missing testcase data\n");
623 return;
624 }
625
626 for (i = 0; i < 7; i++) {
627 bool passed = true;
628 rc = of_irq_parse_one(np, i, &args);
629
630 /* Test the values from tests-phandle.dtsi */
631 switch (i) {
632 case 0:
633 passed &= !rc;
634 passed &= (args.args_count == 1);
635 passed &= (args.args[0] == 1);
636 break;
637 case 1:
638 passed &= !rc;
639 passed &= (args.args_count == 3);
640 passed &= (args.args[0] == 2);
641 passed &= (args.args[1] == 3);
642 passed &= (args.args[2] == 4);
643 break;
644 case 2:
645 passed &= !rc;
646 passed &= (args.args_count == 2);
647 passed &= (args.args[0] == 5);
648 passed &= (args.args[1] == 6);
649 break;
650 case 3:
651 passed &= !rc;
652 passed &= (args.args_count == 1);
653 passed &= (args.args[0] == 9);
654 break;
655 case 4:
656 passed &= !rc;
657 passed &= (args.args_count == 3);
658 passed &= (args.args[0] == 10);
659 passed &= (args.args[1] == 11);
660 passed &= (args.args[2] == 12);
661 break;
662 case 5:
663 passed &= !rc;
664 passed &= (args.args_count == 2);
665 passed &= (args.args[0] == 13);
666 passed &= (args.args[1] == 14);
667 break;
668 case 6:
669 passed &= !rc;
670 passed &= (args.args_count == 1);
671 passed &= (args.args[0] == 15);
672 break;
673 default:
674 passed = false;
675 }
676
677 selftest(passed, "index %i - data error on node %s rc=%i\n",
678 i, args.np->full_name, rc);
679 }
680 of_node_put(np);
681}
682
Grant Likely1f42e5d2014-02-18 21:38:55 +0000683static struct of_device_id match_node_table[] = {
684 { .data = "A", .name = "name0", }, /* Name alone is lowest priority */
685 { .data = "B", .type = "type1", }, /* followed by type alone */
686
687 { .data = "Ca", .name = "name2", .type = "type1", }, /* followed by both together */
688 { .data = "Cb", .name = "name2", }, /* Only match when type doesn't match */
689 { .data = "Cc", .name = "name2", .type = "type2", },
690
691 { .data = "E", .compatible = "compat3" },
692 { .data = "G", .compatible = "compat2", },
693 { .data = "H", .compatible = "compat2", .name = "name5", },
694 { .data = "I", .compatible = "compat2", .type = "type1", },
695 { .data = "J", .compatible = "compat2", .type = "type1", .name = "name8", },
696 { .data = "K", .compatible = "compat2", .name = "name9", },
697 {}
698};
699
700static struct {
701 const char *path;
702 const char *data;
703} match_node_tests[] = {
704 { .path = "/testcase-data/match-node/name0", .data = "A", },
705 { .path = "/testcase-data/match-node/name1", .data = "B", },
706 { .path = "/testcase-data/match-node/a/name2", .data = "Ca", },
707 { .path = "/testcase-data/match-node/b/name2", .data = "Cb", },
708 { .path = "/testcase-data/match-node/c/name2", .data = "Cc", },
709 { .path = "/testcase-data/match-node/name3", .data = "E", },
710 { .path = "/testcase-data/match-node/name4", .data = "G", },
711 { .path = "/testcase-data/match-node/name5", .data = "H", },
712 { .path = "/testcase-data/match-node/name6", .data = "G", },
713 { .path = "/testcase-data/match-node/name7", .data = "I", },
714 { .path = "/testcase-data/match-node/name8", .data = "J", },
715 { .path = "/testcase-data/match-node/name9", .data = "K", },
716};
717
718static void __init of_selftest_match_node(void)
719{
720 struct device_node *np;
721 const struct of_device_id *match;
722 int i;
723
724 for (i = 0; i < ARRAY_SIZE(match_node_tests); i++) {
725 np = of_find_node_by_path(match_node_tests[i].path);
726 if (!np) {
727 selftest(0, "missing testcase node %s\n",
728 match_node_tests[i].path);
729 continue;
730 }
731
732 match = of_match_node(match_node_table, np);
733 if (!match) {
734 selftest(0, "%s didn't match anything\n",
735 match_node_tests[i].path);
736 continue;
737 }
738
739 if (strcmp(match->data, match_node_tests[i].data) != 0) {
740 selftest(0, "%s got wrong match. expected %s, got %s\n",
741 match_node_tests[i].path, match_node_tests[i].data,
742 (const char *)match->data);
743 continue;
744 }
745 selftest(1, "passed");
746 }
747}
748
Grant Likely851da972014-11-04 13:14:13 +0000749struct device test_bus = {
750 .init_name = "unittest-bus",
751};
Rob Herring82c0f582014-04-23 17:57:40 -0500752static void __init of_selftest_platform_populate(void)
753{
Grant Likely851da972014-11-04 13:14:13 +0000754 int irq, rc;
755 struct device_node *np, *child, *grandchild;
Rob Herring82c0f582014-04-23 17:57:40 -0500756 struct platform_device *pdev;
Rob Herringfb2caa52014-05-13 10:07:54 -0500757 struct of_device_id match[] = {
758 { .compatible = "test-device", },
759 {}
760 };
Rob Herring82c0f582014-04-23 17:57:40 -0500761
762 np = of_find_node_by_path("/testcase-data");
763 of_platform_populate(np, of_default_bus_match_table, NULL, NULL);
764
765 /* Test that a missing irq domain returns -EPROBE_DEFER */
766 np = of_find_node_by_path("/testcase-data/testcase-device1");
767 pdev = of_find_device_by_node(np);
Rob Herring7d1cdc82014-05-13 10:07:29 -0500768 selftest(pdev, "device 1 creation failed\n");
769
Rob Herring82c0f582014-04-23 17:57:40 -0500770 irq = platform_get_irq(pdev, 0);
Rob Herring7d1cdc82014-05-13 10:07:29 -0500771 selftest(irq == -EPROBE_DEFER, "device deferred probe failed - %d\n", irq);
Rob Herring82c0f582014-04-23 17:57:40 -0500772
773 /* Test that a parsing failure does not return -EPROBE_DEFER */
774 np = of_find_node_by_path("/testcase-data/testcase-device2");
775 pdev = of_find_device_by_node(np);
Rob Herring7d1cdc82014-05-13 10:07:29 -0500776 selftest(pdev, "device 2 creation failed\n");
Rob Herring82c0f582014-04-23 17:57:40 -0500777 irq = platform_get_irq(pdev, 0);
Rob Herring7d1cdc82014-05-13 10:07:29 -0500778 selftest(irq < 0 && irq != -EPROBE_DEFER, "device parsing error failed - %d\n", irq);
Rob Herring82c0f582014-04-23 17:57:40 -0500779
Grant Likely851da972014-11-04 13:14:13 +0000780 if (selftest(np = of_find_node_by_path("/testcase-data/platform-tests"),
781 "No testcase data in device tree\n"));
Rob Herringfb2caa52014-05-13 10:07:54 -0500782 return;
Grant Likely851da972014-11-04 13:14:13 +0000783
784 if (selftest(!(rc = device_register(&test_bus)),
785 "testbus registration failed; rc=%i\n", rc));
786 return;
Rob Herringfb2caa52014-05-13 10:07:54 -0500787
788 for_each_child_of_node(np, child) {
Grant Likely851da972014-11-04 13:14:13 +0000789 of_platform_populate(child, match, NULL, &test_bus);
Rob Herringfb2caa52014-05-13 10:07:54 -0500790 for_each_child_of_node(child, grandchild)
791 selftest(of_find_device_by_node(grandchild),
792 "Could not create device for node '%s'\n",
793 grandchild->name);
794 }
Grant Likely851da972014-11-04 13:14:13 +0000795
796 of_platform_depopulate(&test_bus);
797 for_each_child_of_node(np, child) {
798 for_each_child_of_node(child, grandchild)
799 selftest(!of_find_device_by_node(grandchild),
800 "device didn't get destroyed '%s'\n",
801 grandchild->name);
802 }
803
804 device_unregister(&test_bus);
805 of_node_put(np);
Rob Herring82c0f582014-04-23 17:57:40 -0500806}
807
Gaurav Minochaae9304c2014-07-16 23:09:39 -0700808/**
809 * update_node_properties - adds the properties
810 * of np into dup node (present in live tree) and
811 * updates parent of children of np to dup.
812 *
813 * @np: node already present in live tree
814 * @dup: node present in live tree to be updated
815 */
816static void update_node_properties(struct device_node *np,
817 struct device_node *dup)
818{
819 struct property *prop;
820 struct device_node *child;
821
822 for_each_property_of_node(np, prop)
823 of_add_property(dup, prop);
824
825 for_each_child_of_node(np, child)
826 child->parent = dup;
827}
828
829/**
830 * attach_node_and_children - attaches nodes
831 * and its children to live tree
832 *
833 * @np: Node to attach to live tree
834 */
835static int attach_node_and_children(struct device_node *np)
836{
Grant Likely5063e252014-10-03 16:28:27 +0100837 struct device_node *next, *dup, *child;
Gaurav Minocha3ce04b42015-01-10 23:19:51 -0800838 unsigned long flags;
Gaurav Minochaae9304c2014-07-16 23:09:39 -0700839
Grant Likely5063e252014-10-03 16:28:27 +0100840 dup = of_find_node_by_path(np->full_name);
841 if (dup) {
842 update_node_properties(np, dup);
843 return 0;
844 }
Gaurav Minochaae9304c2014-07-16 23:09:39 -0700845
Grant Likely5063e252014-10-03 16:28:27 +0100846 child = np->child;
847 np->child = NULL;
Gaurav Minocha3ce04b42015-01-10 23:19:51 -0800848
849 mutex_lock(&of_mutex);
850 raw_spin_lock_irqsave(&devtree_lock, flags);
851 np->sibling = np->parent->child;
852 np->parent->child = np;
853 of_node_clear_flag(np, OF_DETACHED);
854 raw_spin_unlock_irqrestore(&devtree_lock, flags);
855
856 __of_attach_node_sysfs(np);
857 mutex_unlock(&of_mutex);
858
Grant Likely5063e252014-10-03 16:28:27 +0100859 while (child) {
860 next = child->sibling;
861 attach_node_and_children(child);
862 child = next;
Gaurav Minochaae9304c2014-07-16 23:09:39 -0700863 }
864
865 return 0;
866}
867
868/**
869 * selftest_data_add - Reads, copies data from
870 * linked tree and attaches it to the live tree
871 */
872static int __init selftest_data_add(void)
873{
874 void *selftest_data;
Gaurav Minochab951f9d2014-07-26 12:48:50 -0700875 struct device_node *selftest_data_node, *np;
Gaurav Minochaae9304c2014-07-16 23:09:39 -0700876 extern uint8_t __dtb_testcases_begin[];
877 extern uint8_t __dtb_testcases_end[];
878 const int size = __dtb_testcases_end - __dtb_testcases_begin;
Grant Likely2eb46da2014-10-02 14:36:46 +0100879 int rc;
Gaurav Minochaae9304c2014-07-16 23:09:39 -0700880
Gaurav Minochab951f9d2014-07-26 12:48:50 -0700881 if (!size) {
Gaurav Minochaae9304c2014-07-16 23:09:39 -0700882 pr_warn("%s: No testcase data to attach; not running tests\n",
883 __func__);
884 return -ENODATA;
885 }
886
887 /* creating copy */
888 selftest_data = kmemdup(__dtb_testcases_begin, size, GFP_KERNEL);
889
890 if (!selftest_data) {
891 pr_warn("%s: Failed to allocate memory for selftest_data; "
892 "not running tests\n", __func__);
893 return -ENOMEM;
894 }
895 of_fdt_unflatten_tree(selftest_data, &selftest_data_node);
Gaurav Minochab951f9d2014-07-26 12:48:50 -0700896 if (!selftest_data_node) {
897 pr_warn("%s: No tree to attach; not running tests\n", __func__);
898 return -ENODATA;
899 }
Grant Likely2eb46da2014-10-02 14:36:46 +0100900 of_node_set_flag(selftest_data_node, OF_DETACHED);
901 rc = of_resolve_phandles(selftest_data_node);
902 if (rc) {
903 pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__, rc);
904 return -EINVAL;
905 }
Gaurav Minochab951f9d2014-07-26 12:48:50 -0700906
Grant Likely5063e252014-10-03 16:28:27 +0100907 if (!of_root) {
Grant Likely5063e252014-10-03 16:28:27 +0100908 of_root = selftest_data_node;
Gaurav Minochab951f9d2014-07-26 12:48:50 -0700909 for_each_of_allnodes(np)
910 __of_attach_node_sysfs(np);
911 of_aliases = of_find_node_by_path("/aliases");
912 of_chosen = of_find_node_by_path("/chosen");
913 return 0;
914 }
Gaurav Minochaae9304c2014-07-16 23:09:39 -0700915
916 /* attach the sub-tree to live tree */
Grant Likely5063e252014-10-03 16:28:27 +0100917 np = selftest_data_node->child;
918 while (np) {
919 struct device_node *next = np->sibling;
920 np->parent = of_root;
921 attach_node_and_children(np);
922 np = next;
923 }
924 return 0;
Gaurav Minochaae9304c2014-07-16 23:09:39 -0700925}
926
Pantelis Antoniou177d2712014-10-28 22:35:59 +0200927#ifdef CONFIG_OF_OVERLAY
928
929static int selftest_probe(struct platform_device *pdev)
930{
931 struct device *dev = &pdev->dev;
932 struct device_node *np = dev->of_node;
933
934 if (np == NULL) {
935 dev_err(dev, "No OF data for device\n");
936 return -EINVAL;
937
938 }
939
940 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
Pantelis Antoniou6b1271d2014-12-19 14:34:34 +0200941
942 of_platform_populate(np, NULL, NULL, &pdev->dev);
943
Pantelis Antoniou177d2712014-10-28 22:35:59 +0200944 return 0;
945}
946
947static int selftest_remove(struct platform_device *pdev)
948{
949 struct device *dev = &pdev->dev;
950 struct device_node *np = dev->of_node;
951
952 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
953 return 0;
954}
955
956static struct of_device_id selftest_match[] = {
957 { .compatible = "selftest", },
958 {},
959};
Pantelis Antoniou177d2712014-10-28 22:35:59 +0200960
961static struct platform_driver selftest_driver = {
962 .probe = selftest_probe,
963 .remove = selftest_remove,
964 .driver = {
965 .name = "selftest",
966 .owner = THIS_MODULE,
967 .of_match_table = of_match_ptr(selftest_match),
968 },
969};
970
971/* get the platform device instantiated at the path */
972static struct platform_device *of_path_to_platform_device(const char *path)
973{
974 struct device_node *np;
975 struct platform_device *pdev;
976
977 np = of_find_node_by_path(path);
978 if (np == NULL)
979 return NULL;
980
981 pdev = of_find_device_by_node(np);
982 of_node_put(np);
983
984 return pdev;
985}
986
987/* find out if a platform device exists at that path */
988static int of_path_platform_device_exists(const char *path)
989{
990 struct platform_device *pdev;
991
992 pdev = of_path_to_platform_device(path);
993 platform_device_put(pdev);
994 return pdev != NULL;
995}
996
Arnd Bergmann4252de32015-03-04 20:49:47 +0100997#if IS_BUILTIN(CONFIG_I2C)
Pantelis Antonioud5e75502015-01-12 19:02:49 +0200998
999/* get the i2c client device instantiated at the path */
1000static struct i2c_client *of_path_to_i2c_client(const char *path)
Pantelis Antoniou177d2712014-10-28 22:35:59 +02001001{
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001002 struct device_node *np;
1003 struct i2c_client *client;
1004
1005 np = of_find_node_by_path(path);
1006 if (np == NULL)
1007 return NULL;
1008
1009 client = of_find_i2c_device_by_node(np);
1010 of_node_put(np);
1011
1012 return client;
1013}
1014
1015/* find out if a i2c client device exists at that path */
1016static int of_path_i2c_client_exists(const char *path)
1017{
1018 struct i2c_client *client;
1019
1020 client = of_path_to_i2c_client(path);
1021 if (client)
1022 put_device(&client->dev);
1023 return client != NULL;
1024}
1025#else
1026static int of_path_i2c_client_exists(const char *path)
1027{
1028 return 0;
1029}
1030#endif
1031
1032enum overlay_type {
1033 PDEV_OVERLAY,
1034 I2C_OVERLAY
1035};
1036
1037static int of_path_device_type_exists(const char *path,
1038 enum overlay_type ovtype)
1039{
1040 switch (ovtype) {
1041 case PDEV_OVERLAY:
1042 return of_path_platform_device_exists(path);
1043 case I2C_OVERLAY:
1044 return of_path_i2c_client_exists(path);
1045 }
1046 return 0;
1047}
1048
1049static const char *selftest_path(int nr, enum overlay_type ovtype)
1050{
1051 const char *base;
Pantelis Antoniou177d2712014-10-28 22:35:59 +02001052 static char buf[256];
1053
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001054 switch (ovtype) {
1055 case PDEV_OVERLAY:
1056 base = "/testcase-data/overlay-node/test-bus";
1057 break;
1058 case I2C_OVERLAY:
1059 base = "/testcase-data/overlay-node/test-bus/i2c-test-bus";
1060 break;
1061 default:
1062 buf[0] = '\0';
1063 return buf;
1064 }
1065 snprintf(buf, sizeof(buf) - 1, "%s/test-selftest%d", base, nr);
Pantelis Antoniou177d2712014-10-28 22:35:59 +02001066 buf[sizeof(buf) - 1] = '\0';
Pantelis Antoniou177d2712014-10-28 22:35:59 +02001067 return buf;
1068}
1069
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001070static int of_selftest_device_exists(int selftest_nr, enum overlay_type ovtype)
1071{
1072 const char *path;
1073
1074 path = selftest_path(selftest_nr, ovtype);
1075
1076 switch (ovtype) {
1077 case PDEV_OVERLAY:
1078 return of_path_platform_device_exists(path);
1079 case I2C_OVERLAY:
1080 return of_path_i2c_client_exists(path);
1081 }
1082 return 0;
1083}
1084
Pantelis Antoniou177d2712014-10-28 22:35:59 +02001085static const char *overlay_path(int nr)
1086{
1087 static char buf[256];
1088
1089 snprintf(buf, sizeof(buf) - 1,
1090 "/testcase-data/overlay%d", nr);
1091 buf[sizeof(buf) - 1] = '\0';
1092
1093 return buf;
1094}
1095
1096static const char *bus_path = "/testcase-data/overlay-node/test-bus";
1097
1098static int of_selftest_apply_overlay(int selftest_nr, int overlay_nr,
1099 int *overlay_id)
1100{
1101 struct device_node *np = NULL;
1102 int ret, id = -1;
1103
1104 np = of_find_node_by_path(overlay_path(overlay_nr));
1105 if (np == NULL) {
1106 selftest(0, "could not find overlay node @\"%s\"\n",
1107 overlay_path(overlay_nr));
1108 ret = -EINVAL;
1109 goto out;
1110 }
1111
1112 ret = of_overlay_create(np);
1113 if (ret < 0) {
1114 selftest(0, "could not create overlay from \"%s\"\n",
1115 overlay_path(overlay_nr));
1116 goto out;
1117 }
1118 id = ret;
1119
1120 ret = 0;
1121
1122out:
1123 of_node_put(np);
1124
1125 if (overlay_id)
1126 *overlay_id = id;
1127
1128 return ret;
1129}
1130
1131/* apply an overlay while checking before and after states */
1132static int of_selftest_apply_overlay_check(int overlay_nr, int selftest_nr,
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001133 int before, int after, enum overlay_type ovtype)
Pantelis Antoniou177d2712014-10-28 22:35:59 +02001134{
1135 int ret;
1136
1137 /* selftest device must not be in before state */
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001138 if (of_selftest_device_exists(selftest_nr, ovtype) != before) {
Pantelis Antoniou177d2712014-10-28 22:35:59 +02001139 selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1140 overlay_path(overlay_nr),
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001141 selftest_path(selftest_nr, ovtype),
Pantelis Antoniou177d2712014-10-28 22:35:59 +02001142 !before ? "enabled" : "disabled");
1143 return -EINVAL;
1144 }
1145
1146 ret = of_selftest_apply_overlay(overlay_nr, selftest_nr, NULL);
1147 if (ret != 0) {
1148 /* of_selftest_apply_overlay already called selftest() */
1149 return ret;
1150 }
1151
1152 /* selftest device must be to set to after state */
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001153 if (of_selftest_device_exists(selftest_nr, ovtype) != after) {
Pantelis Antoniou177d2712014-10-28 22:35:59 +02001154 selftest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n",
1155 overlay_path(overlay_nr),
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001156 selftest_path(selftest_nr, ovtype),
Pantelis Antoniou177d2712014-10-28 22:35:59 +02001157 !after ? "enabled" : "disabled");
1158 return -EINVAL;
1159 }
1160
1161 return 0;
1162}
1163
1164/* apply an overlay and then revert it while checking before, after states */
1165static int of_selftest_apply_revert_overlay_check(int overlay_nr,
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001166 int selftest_nr, int before, int after,
1167 enum overlay_type ovtype)
Pantelis Antoniou177d2712014-10-28 22:35:59 +02001168{
1169 int ret, ov_id;
1170
1171 /* selftest device must be in before state */
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001172 if (of_selftest_device_exists(selftest_nr, ovtype) != before) {
Pantelis Antoniou177d2712014-10-28 22:35:59 +02001173 selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1174 overlay_path(overlay_nr),
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001175 selftest_path(selftest_nr, ovtype),
Pantelis Antoniou177d2712014-10-28 22:35:59 +02001176 !before ? "enabled" : "disabled");
1177 return -EINVAL;
1178 }
1179
1180 /* apply the overlay */
1181 ret = of_selftest_apply_overlay(overlay_nr, selftest_nr, &ov_id);
1182 if (ret != 0) {
1183 /* of_selftest_apply_overlay already called selftest() */
1184 return ret;
1185 }
1186
1187 /* selftest device must be in after state */
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001188 if (of_selftest_device_exists(selftest_nr, ovtype) != after) {
Pantelis Antoniou177d2712014-10-28 22:35:59 +02001189 selftest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n",
1190 overlay_path(overlay_nr),
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001191 selftest_path(selftest_nr, ovtype),
Pantelis Antoniou177d2712014-10-28 22:35:59 +02001192 !after ? "enabled" : "disabled");
1193 return -EINVAL;
1194 }
1195
1196 ret = of_overlay_destroy(ov_id);
1197 if (ret != 0) {
1198 selftest(0, "overlay @\"%s\" failed to be destroyed @\"%s\"\n",
1199 overlay_path(overlay_nr),
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001200 selftest_path(selftest_nr, ovtype));
Pantelis Antoniou177d2712014-10-28 22:35:59 +02001201 return ret;
1202 }
1203
1204 /* selftest device must be again in before state */
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001205 if (of_selftest_device_exists(selftest_nr, PDEV_OVERLAY) != before) {
Pantelis Antoniou177d2712014-10-28 22:35:59 +02001206 selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1207 overlay_path(overlay_nr),
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001208 selftest_path(selftest_nr, ovtype),
Pantelis Antoniou177d2712014-10-28 22:35:59 +02001209 !before ? "enabled" : "disabled");
1210 return -EINVAL;
1211 }
1212
1213 return 0;
1214}
1215
1216/* test activation of device */
1217static void of_selftest_overlay_0(void)
1218{
1219 int ret;
1220
1221 /* device should enable */
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001222 ret = of_selftest_apply_overlay_check(0, 0, 0, 1, PDEV_OVERLAY);
Pantelis Antoniou177d2712014-10-28 22:35:59 +02001223 if (ret != 0)
1224 return;
1225
1226 selftest(1, "overlay test %d passed\n", 0);
1227}
1228
1229/* test deactivation of device */
1230static void of_selftest_overlay_1(void)
1231{
1232 int ret;
1233
1234 /* device should disable */
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001235 ret = of_selftest_apply_overlay_check(1, 1, 1, 0, PDEV_OVERLAY);
Pantelis Antoniou177d2712014-10-28 22:35:59 +02001236 if (ret != 0)
1237 return;
1238
1239 selftest(1, "overlay test %d passed\n", 1);
1240}
1241
1242/* test activation of device */
1243static void of_selftest_overlay_2(void)
1244{
1245 int ret;
1246
1247 /* device should enable */
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001248 ret = of_selftest_apply_overlay_check(2, 2, 0, 1, PDEV_OVERLAY);
Pantelis Antoniou177d2712014-10-28 22:35:59 +02001249 if (ret != 0)
1250 return;
1251
1252 selftest(1, "overlay test %d passed\n", 2);
1253}
1254
1255/* test deactivation of device */
1256static void of_selftest_overlay_3(void)
1257{
1258 int ret;
1259
1260 /* device should disable */
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001261 ret = of_selftest_apply_overlay_check(3, 3, 1, 0, PDEV_OVERLAY);
Pantelis Antoniou177d2712014-10-28 22:35:59 +02001262 if (ret != 0)
1263 return;
1264
1265 selftest(1, "overlay test %d passed\n", 3);
1266}
1267
1268/* test activation of a full device node */
1269static void of_selftest_overlay_4(void)
1270{
1271 int ret;
1272
1273 /* device should disable */
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001274 ret = of_selftest_apply_overlay_check(4, 4, 0, 1, PDEV_OVERLAY);
Pantelis Antoniou177d2712014-10-28 22:35:59 +02001275 if (ret != 0)
1276 return;
1277
1278 selftest(1, "overlay test %d passed\n", 4);
1279}
1280
1281/* test overlay apply/revert sequence */
1282static void of_selftest_overlay_5(void)
1283{
1284 int ret;
1285
1286 /* device should disable */
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001287 ret = of_selftest_apply_revert_overlay_check(5, 5, 0, 1, PDEV_OVERLAY);
Pantelis Antoniou177d2712014-10-28 22:35:59 +02001288 if (ret != 0)
1289 return;
1290
1291 selftest(1, "overlay test %d passed\n", 5);
1292}
1293
1294/* test overlay application in sequence */
1295static void of_selftest_overlay_6(void)
1296{
1297 struct device_node *np;
1298 int ret, i, ov_id[2];
1299 int overlay_nr = 6, selftest_nr = 6;
1300 int before = 0, after = 1;
1301
1302 /* selftest device must be in before state */
1303 for (i = 0; i < 2; i++) {
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001304 if (of_selftest_device_exists(selftest_nr + i, PDEV_OVERLAY)
Pantelis Antoniou177d2712014-10-28 22:35:59 +02001305 != before) {
1306 selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1307 overlay_path(overlay_nr + i),
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001308 selftest_path(selftest_nr + i,
1309 PDEV_OVERLAY),
Pantelis Antoniou177d2712014-10-28 22:35:59 +02001310 !before ? "enabled" : "disabled");
1311 return;
1312 }
1313 }
1314
1315 /* apply the overlays */
1316 for (i = 0; i < 2; i++) {
1317
1318 np = of_find_node_by_path(overlay_path(overlay_nr + i));
1319 if (np == NULL) {
1320 selftest(0, "could not find overlay node @\"%s\"\n",
1321 overlay_path(overlay_nr + i));
1322 return;
1323 }
1324
1325 ret = of_overlay_create(np);
1326 if (ret < 0) {
1327 selftest(0, "could not create overlay from \"%s\"\n",
1328 overlay_path(overlay_nr + i));
1329 return;
1330 }
1331 ov_id[i] = ret;
1332 }
1333
1334 for (i = 0; i < 2; i++) {
1335 /* selftest device must be in after state */
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001336 if (of_selftest_device_exists(selftest_nr + i, PDEV_OVERLAY)
Pantelis Antoniou177d2712014-10-28 22:35:59 +02001337 != after) {
1338 selftest(0, "overlay @\"%s\" failed @\"%s\" %s\n",
1339 overlay_path(overlay_nr + i),
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001340 selftest_path(selftest_nr + i,
1341 PDEV_OVERLAY),
Pantelis Antoniou177d2712014-10-28 22:35:59 +02001342 !after ? "enabled" : "disabled");
1343 return;
1344 }
1345 }
1346
1347 for (i = 1; i >= 0; i--) {
1348 ret = of_overlay_destroy(ov_id[i]);
1349 if (ret != 0) {
1350 selftest(0, "overlay @\"%s\" failed destroy @\"%s\"\n",
1351 overlay_path(overlay_nr + i),
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001352 selftest_path(selftest_nr + i,
1353 PDEV_OVERLAY));
Pantelis Antoniou177d2712014-10-28 22:35:59 +02001354 return;
1355 }
1356 }
1357
1358 for (i = 0; i < 2; i++) {
1359 /* selftest device must be again in before state */
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001360 if (of_selftest_device_exists(selftest_nr + i, PDEV_OVERLAY)
Pantelis Antoniou177d2712014-10-28 22:35:59 +02001361 != before) {
1362 selftest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
1363 overlay_path(overlay_nr + i),
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001364 selftest_path(selftest_nr + i,
1365 PDEV_OVERLAY),
Pantelis Antoniou177d2712014-10-28 22:35:59 +02001366 !before ? "enabled" : "disabled");
1367 return;
1368 }
1369 }
1370
1371 selftest(1, "overlay test %d passed\n", 6);
1372}
1373
1374/* test overlay application in sequence */
1375static void of_selftest_overlay_8(void)
1376{
1377 struct device_node *np;
1378 int ret, i, ov_id[2];
1379 int overlay_nr = 8, selftest_nr = 8;
1380
1381 /* we don't care about device state in this test */
1382
1383 /* apply the overlays */
1384 for (i = 0; i < 2; i++) {
1385
1386 np = of_find_node_by_path(overlay_path(overlay_nr + i));
1387 if (np == NULL) {
1388 selftest(0, "could not find overlay node @\"%s\"\n",
1389 overlay_path(overlay_nr + i));
1390 return;
1391 }
1392
1393 ret = of_overlay_create(np);
1394 if (ret < 0) {
1395 selftest(0, "could not create overlay from \"%s\"\n",
1396 overlay_path(overlay_nr + i));
1397 return;
1398 }
1399 ov_id[i] = ret;
1400 }
1401
1402 /* now try to remove first overlay (it should fail) */
1403 ret = of_overlay_destroy(ov_id[0]);
1404 if (ret == 0) {
1405 selftest(0, "overlay @\"%s\" was destroyed @\"%s\"\n",
1406 overlay_path(overlay_nr + 0),
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001407 selftest_path(selftest_nr,
1408 PDEV_OVERLAY));
Pantelis Antoniou177d2712014-10-28 22:35:59 +02001409 return;
1410 }
1411
1412 /* removing them in order should work */
1413 for (i = 1; i >= 0; i--) {
1414 ret = of_overlay_destroy(ov_id[i]);
1415 if (ret != 0) {
1416 selftest(0, "overlay @\"%s\" not destroyed @\"%s\"\n",
1417 overlay_path(overlay_nr + i),
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001418 selftest_path(selftest_nr,
1419 PDEV_OVERLAY));
Pantelis Antoniou177d2712014-10-28 22:35:59 +02001420 return;
1421 }
1422 }
1423
1424 selftest(1, "overlay test %d passed\n", 8);
1425}
1426
Pantelis Antoniou6b1271d2014-12-19 14:34:34 +02001427/* test insertion of a bus with parent devices */
1428static void of_selftest_overlay_10(void)
1429{
1430 int ret;
1431 char *child_path;
1432
1433 /* device should disable */
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001434 ret = of_selftest_apply_overlay_check(10, 10, 0, 1, PDEV_OVERLAY);
1435 if (selftest(ret == 0,
1436 "overlay test %d failed; overlay application\n", 10))
Pantelis Antoniou6b1271d2014-12-19 14:34:34 +02001437 return;
1438
1439 child_path = kasprintf(GFP_KERNEL, "%s/test-selftest101",
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001440 selftest_path(10, PDEV_OVERLAY));
Pantelis Antoniou6b1271d2014-12-19 14:34:34 +02001441 if (selftest(child_path, "overlay test %d failed; kasprintf\n", 10))
1442 return;
1443
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001444 ret = of_path_device_type_exists(child_path, PDEV_OVERLAY);
Pantelis Antoniou6b1271d2014-12-19 14:34:34 +02001445 kfree(child_path);
1446 if (selftest(ret, "overlay test %d failed; no child device\n", 10))
1447 return;
1448}
1449
1450/* test insertion of a bus with parent devices (and revert) */
1451static void of_selftest_overlay_11(void)
1452{
1453 int ret;
1454
1455 /* device should disable */
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001456 ret = of_selftest_apply_revert_overlay_check(11, 11, 0, 1,
1457 PDEV_OVERLAY);
1458 if (selftest(ret == 0,
1459 "overlay test %d failed; overlay application\n", 11))
Pantelis Antoniou6b1271d2014-12-19 14:34:34 +02001460 return;
1461}
1462
Arnd Bergmann4252de32015-03-04 20:49:47 +01001463#if IS_BUILTIN(CONFIG_I2C) && IS_ENABLED(CONFIG_OF_OVERLAY)
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001464
1465struct selftest_i2c_bus_data {
1466 struct platform_device *pdev;
1467 struct i2c_adapter adap;
1468};
1469
1470static int selftest_i2c_master_xfer(struct i2c_adapter *adap,
1471 struct i2c_msg *msgs, int num)
1472{
1473 struct selftest_i2c_bus_data *std = i2c_get_adapdata(adap);
1474
1475 (void)std;
1476
1477 return num;
1478}
1479
1480static u32 selftest_i2c_functionality(struct i2c_adapter *adap)
1481{
1482 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
1483}
1484
1485static const struct i2c_algorithm selftest_i2c_algo = {
1486 .master_xfer = selftest_i2c_master_xfer,
1487 .functionality = selftest_i2c_functionality,
1488};
1489
1490static int selftest_i2c_bus_probe(struct platform_device *pdev)
1491{
1492 struct device *dev = &pdev->dev;
1493 struct device_node *np = dev->of_node;
1494 struct selftest_i2c_bus_data *std;
1495 struct i2c_adapter *adap;
1496 int ret;
1497
1498 if (np == NULL) {
1499 dev_err(dev, "No OF data for device\n");
1500 return -EINVAL;
1501
1502 }
1503
1504 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1505
1506 std = devm_kzalloc(dev, sizeof(*std), GFP_KERNEL);
1507 if (!std) {
1508 dev_err(dev, "Failed to allocate selftest i2c data\n");
1509 return -ENOMEM;
1510 }
1511
1512 /* link them together */
1513 std->pdev = pdev;
1514 platform_set_drvdata(pdev, std);
1515
1516 adap = &std->adap;
1517 i2c_set_adapdata(adap, std);
1518 adap->nr = -1;
1519 strlcpy(adap->name, pdev->name, sizeof(adap->name));
1520 adap->class = I2C_CLASS_DEPRECATED;
1521 adap->algo = &selftest_i2c_algo;
1522 adap->dev.parent = dev;
1523 adap->dev.of_node = dev->of_node;
1524 adap->timeout = 5 * HZ;
1525 adap->retries = 3;
1526
1527 ret = i2c_add_numbered_adapter(adap);
1528 if (ret != 0) {
1529 dev_err(dev, "Failed to add I2C adapter\n");
1530 return ret;
1531 }
1532
1533 return 0;
1534}
1535
1536static int selftest_i2c_bus_remove(struct platform_device *pdev)
1537{
1538 struct device *dev = &pdev->dev;
1539 struct device_node *np = dev->of_node;
1540 struct selftest_i2c_bus_data *std = platform_get_drvdata(pdev);
1541
1542 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1543 i2c_del_adapter(&std->adap);
1544
1545 return 0;
1546}
1547
1548static struct of_device_id selftest_i2c_bus_match[] = {
1549 { .compatible = "selftest-i2c-bus", },
1550 {},
1551};
1552
1553static struct platform_driver selftest_i2c_bus_driver = {
1554 .probe = selftest_i2c_bus_probe,
1555 .remove = selftest_i2c_bus_remove,
1556 .driver = {
1557 .name = "selftest-i2c-bus",
1558 .of_match_table = of_match_ptr(selftest_i2c_bus_match),
1559 },
1560};
1561
1562static int selftest_i2c_dev_probe(struct i2c_client *client,
1563 const struct i2c_device_id *id)
1564{
1565 struct device *dev = &client->dev;
1566 struct device_node *np = client->dev.of_node;
1567
1568 if (!np) {
1569 dev_err(dev, "No OF node\n");
1570 return -EINVAL;
1571 }
1572
1573 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1574
1575 return 0;
1576};
1577
1578static int selftest_i2c_dev_remove(struct i2c_client *client)
1579{
1580 struct device *dev = &client->dev;
1581 struct device_node *np = client->dev.of_node;
1582
1583 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1584 return 0;
1585}
1586
1587static const struct i2c_device_id selftest_i2c_dev_id[] = {
1588 { .name = "selftest-i2c-dev" },
1589 { }
1590};
1591
1592static struct i2c_driver selftest_i2c_dev_driver = {
1593 .driver = {
1594 .name = "selftest-i2c-dev",
1595 .owner = THIS_MODULE,
1596 },
1597 .probe = selftest_i2c_dev_probe,
1598 .remove = selftest_i2c_dev_remove,
1599 .id_table = selftest_i2c_dev_id,
1600};
1601
Arnd Bergmann4252de32015-03-04 20:49:47 +01001602#if IS_BUILTIN(CONFIG_I2C_MUX)
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001603
1604struct selftest_i2c_mux_data {
1605 int nchans;
1606 struct i2c_adapter *adap[];
1607};
1608
1609static int selftest_i2c_mux_select_chan(struct i2c_adapter *adap,
1610 void *client, u32 chan)
1611{
1612 return 0;
1613}
1614
1615static int selftest_i2c_mux_probe(struct i2c_client *client,
1616 const struct i2c_device_id *id)
1617{
1618 int ret, i, nchans, size;
1619 struct device *dev = &client->dev;
1620 struct i2c_adapter *adap = to_i2c_adapter(dev->parent);
1621 struct device_node *np = client->dev.of_node, *child;
1622 struct selftest_i2c_mux_data *stm;
1623 u32 reg, max_reg;
1624
1625 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1626
1627 if (!np) {
1628 dev_err(dev, "No OF node\n");
1629 return -EINVAL;
1630 }
1631
1632 max_reg = (u32)-1;
1633 for_each_child_of_node(np, child) {
1634 ret = of_property_read_u32(child, "reg", &reg);
1635 if (ret)
1636 continue;
1637 if (max_reg == (u32)-1 || reg > max_reg)
1638 max_reg = reg;
1639 }
1640 nchans = max_reg == (u32)-1 ? 0 : max_reg + 1;
1641 if (nchans == 0) {
1642 dev_err(dev, "No channels\n");
1643 return -EINVAL;
1644 }
1645
1646 size = offsetof(struct selftest_i2c_mux_data, adap[nchans]);
1647 stm = devm_kzalloc(dev, size, GFP_KERNEL);
1648 if (!stm) {
1649 dev_err(dev, "Out of memory\n");
1650 return -ENOMEM;
1651 }
1652 stm->nchans = nchans;
1653 for (i = 0; i < nchans; i++) {
1654 stm->adap[i] = i2c_add_mux_adapter(adap, dev, client,
1655 0, i, 0, selftest_i2c_mux_select_chan, NULL);
1656 if (!stm->adap[i]) {
1657 dev_err(dev, "Failed to register mux #%d\n", i);
1658 for (i--; i >= 0; i--)
1659 i2c_del_mux_adapter(stm->adap[i]);
1660 return -ENODEV;
1661 }
1662 }
1663
1664 i2c_set_clientdata(client, stm);
1665
1666 return 0;
1667};
1668
1669static int selftest_i2c_mux_remove(struct i2c_client *client)
1670{
1671 struct device *dev = &client->dev;
1672 struct device_node *np = client->dev.of_node;
1673 struct selftest_i2c_mux_data *stm = i2c_get_clientdata(client);
1674 int i;
1675
1676 dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
1677 for (i = stm->nchans - 1; i >= 0; i--)
1678 i2c_del_mux_adapter(stm->adap[i]);
1679 return 0;
1680}
1681
1682static const struct i2c_device_id selftest_i2c_mux_id[] = {
1683 { .name = "selftest-i2c-mux" },
1684 { }
1685};
1686
1687static struct i2c_driver selftest_i2c_mux_driver = {
1688 .driver = {
1689 .name = "selftest-i2c-mux",
1690 .owner = THIS_MODULE,
1691 },
1692 .probe = selftest_i2c_mux_probe,
1693 .remove = selftest_i2c_mux_remove,
1694 .id_table = selftest_i2c_mux_id,
1695};
1696
1697#endif
1698
1699static int of_selftest_overlay_i2c_init(void)
1700{
1701 int ret;
1702
1703 ret = i2c_add_driver(&selftest_i2c_dev_driver);
1704 if (selftest(ret == 0,
1705 "could not register selftest i2c device driver\n"))
1706 return ret;
1707
1708 ret = platform_driver_register(&selftest_i2c_bus_driver);
1709 if (selftest(ret == 0,
1710 "could not register selftest i2c bus driver\n"))
1711 return ret;
1712
Arnd Bergmann4252de32015-03-04 20:49:47 +01001713#if IS_BUILTIN(CONFIG_I2C_MUX)
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001714 ret = i2c_add_driver(&selftest_i2c_mux_driver);
1715 if (selftest(ret == 0,
1716 "could not register selftest i2c mux driver\n"))
1717 return ret;
1718#endif
1719
1720 return 0;
1721}
1722
1723static void of_selftest_overlay_i2c_cleanup(void)
1724{
Arnd Bergmann4252de32015-03-04 20:49:47 +01001725#if IS_BUILTIN(CONFIG_I2C_MUX)
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001726 i2c_del_driver(&selftest_i2c_mux_driver);
1727#endif
1728 platform_driver_unregister(&selftest_i2c_bus_driver);
1729 i2c_del_driver(&selftest_i2c_dev_driver);
1730}
1731
1732static void of_selftest_overlay_i2c_12(void)
1733{
1734 int ret;
1735
1736 /* device should enable */
1737 ret = of_selftest_apply_overlay_check(12, 12, 0, 1, I2C_OVERLAY);
1738 if (ret != 0)
1739 return;
1740
1741 selftest(1, "overlay test %d passed\n", 12);
1742}
1743
1744/* test deactivation of device */
1745static void of_selftest_overlay_i2c_13(void)
1746{
1747 int ret;
1748
1749 /* device should disable */
1750 ret = of_selftest_apply_overlay_check(13, 13, 1, 0, I2C_OVERLAY);
1751 if (ret != 0)
1752 return;
1753
1754 selftest(1, "overlay test %d passed\n", 13);
1755}
1756
1757/* just check for i2c mux existence */
1758static void of_selftest_overlay_i2c_14(void)
1759{
1760}
1761
1762static void of_selftest_overlay_i2c_15(void)
1763{
1764 int ret;
1765
1766 /* device should enable */
1767 ret = of_selftest_apply_overlay_check(16, 15, 0, 1, I2C_OVERLAY);
1768 if (ret != 0)
1769 return;
1770
1771 selftest(1, "overlay test %d passed\n", 15);
1772}
1773
1774#else
1775
1776static inline void of_selftest_overlay_i2c_14(void) { }
1777static inline void of_selftest_overlay_i2c_15(void) { }
1778
1779#endif
1780
Pantelis Antoniou177d2712014-10-28 22:35:59 +02001781static void __init of_selftest_overlay(void)
1782{
1783 struct device_node *bus_np = NULL;
1784 int ret;
1785
1786 ret = platform_driver_register(&selftest_driver);
1787 if (ret != 0) {
1788 selftest(0, "could not register selftest driver\n");
1789 goto out;
1790 }
1791
1792 bus_np = of_find_node_by_path(bus_path);
1793 if (bus_np == NULL) {
1794 selftest(0, "could not find bus_path \"%s\"\n", bus_path);
1795 goto out;
1796 }
1797
1798 ret = of_platform_populate(bus_np, of_default_bus_match_table,
1799 NULL, NULL);
1800 if (ret != 0) {
1801 selftest(0, "could not populate bus @ \"%s\"\n", bus_path);
1802 goto out;
1803 }
1804
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001805 if (!of_selftest_device_exists(100, PDEV_OVERLAY)) {
Pantelis Antoniou177d2712014-10-28 22:35:59 +02001806 selftest(0, "could not find selftest0 @ \"%s\"\n",
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001807 selftest_path(100, PDEV_OVERLAY));
Pantelis Antoniou177d2712014-10-28 22:35:59 +02001808 goto out;
1809 }
1810
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001811 if (of_selftest_device_exists(101, PDEV_OVERLAY)) {
Pantelis Antoniou177d2712014-10-28 22:35:59 +02001812 selftest(0, "selftest1 @ \"%s\" should not exist\n",
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001813 selftest_path(101, PDEV_OVERLAY));
Pantelis Antoniou177d2712014-10-28 22:35:59 +02001814 goto out;
1815 }
1816
1817 selftest(1, "basic infrastructure of overlays passed");
1818
1819 /* tests in sequence */
1820 of_selftest_overlay_0();
1821 of_selftest_overlay_1();
1822 of_selftest_overlay_2();
1823 of_selftest_overlay_3();
1824 of_selftest_overlay_4();
1825 of_selftest_overlay_5();
1826 of_selftest_overlay_6();
1827 of_selftest_overlay_8();
1828
Pantelis Antoniou6b1271d2014-12-19 14:34:34 +02001829 of_selftest_overlay_10();
1830 of_selftest_overlay_11();
1831
Arnd Bergmann4252de32015-03-04 20:49:47 +01001832#if IS_BUILTIN(CONFIG_I2C)
Pantelis Antonioud5e75502015-01-12 19:02:49 +02001833 if (selftest(of_selftest_overlay_i2c_init() == 0, "i2c init failed\n"))
1834 goto out;
1835
1836 of_selftest_overlay_i2c_12();
1837 of_selftest_overlay_i2c_13();
1838 of_selftest_overlay_i2c_14();
1839 of_selftest_overlay_i2c_15();
1840
1841 of_selftest_overlay_i2c_cleanup();
1842#endif
1843
Pantelis Antoniou177d2712014-10-28 22:35:59 +02001844out:
1845 of_node_put(bus_np);
1846}
1847
1848#else
1849static inline void __init of_selftest_overlay(void) { }
1850#endif
1851
Grant Likely53a42092011-12-12 09:25:57 -07001852static int __init of_selftest(void)
1853{
1854 struct device_node *np;
Gaurav Minochaae9304c2014-07-16 23:09:39 -07001855 int res;
1856
1857 /* adding data for selftest */
1858 res = selftest_data_add();
1859 if (res)
1860 return res;
Grant Likely788ec2f2014-11-19 17:13:44 +00001861 if (!of_aliases)
1862 of_aliases = of_find_node_by_path("/aliases");
Grant Likely53a42092011-12-12 09:25:57 -07001863
1864 np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
1865 if (!np) {
1866 pr_info("No testcase data in device tree; not running tests\n");
1867 return 0;
1868 }
1869 of_node_put(np);
1870
1871 pr_info("start of selftest - you will see error messages\n");
Grant Likelyf2051d62014-10-01 17:40:22 +01001872 of_selftest_check_tree_linkage();
Grant Likely841ec212014-10-02 13:09:15 +01001873 of_selftest_check_phandles();
Grant Likelyae91ff72014-03-14 13:53:10 +00001874 of_selftest_find_node_by_name();
Grant Likely7e66c5c2013-11-15 17:19:09 +00001875 of_selftest_dynamic();
Grant Likely53a42092011-12-12 09:25:57 -07001876 of_selftest_parse_phandle_with_args();
Grant Likelya87fa1d2014-11-03 15:15:35 +00001877 of_selftest_property_string();
Pantelis Antoniou69843392014-07-04 19:58:47 +03001878 of_selftest_property_copy();
Pantelis Antoniou201c9102014-07-04 19:58:49 +03001879 of_selftest_changeset();
Grant Likelya9f10ca2013-10-11 22:04:23 +01001880 of_selftest_parse_interrupts();
Grant Likely79d97012013-09-19 16:47:37 -05001881 of_selftest_parse_interrupts_extended();
Grant Likely1f42e5d2014-02-18 21:38:55 +00001882 of_selftest_match_node();
Rob Herring82c0f582014-04-23 17:57:40 -05001883 of_selftest_platform_populate();
Pantelis Antoniou177d2712014-10-28 22:35:59 +02001884 of_selftest_overlay();
Gaurav Minochaae9304c2014-07-16 23:09:39 -07001885
Grant Likelyf2051d62014-10-01 17:40:22 +01001886 /* Double check linkage after removing testcase data */
1887 of_selftest_check_tree_linkage();
1888
1889 pr_info("end of selftest - %i passed, %i failed\n",
1890 selftest_results.passed, selftest_results.failed);
1891
Grant Likely53a42092011-12-12 09:25:57 -07001892 return 0;
1893}
1894late_initcall(of_selftest);