2 * Self tests for device tree subsystem
5 #define pr_fmt(fmt) "### dt-test ### " fmt
9 #include <linux/errno.h>
10 #include <linux/module.h>
12 #include <linux/of_irq.h>
13 #include <linux/list.h>
14 #include <linux/mutex.h>
15 #include <linux/slab.h>
16 #include <linux/device.h>
18 static struct selftest_results
{
23 #define selftest(result, fmt, ...) { \
25 selftest_results.failed++; \
26 pr_err("FAIL %s():%i " fmt, __func__, __LINE__, ##__VA_ARGS__); \
28 selftest_results.passed++; \
29 pr_debug("pass %s():%i\n", __func__, __LINE__); \
33 static void __init
of_selftest_parse_phandle_with_args(void)
35 struct device_node
*np
;
36 struct of_phandle_args args
;
39 np
= of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
41 pr_err("missing testcase data\n");
45 rc
= of_count_phandle_with_args(np
, "phandle-list", "#phandle-cells");
46 selftest(rc
== 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc
);
48 for (i
= 0; i
< 8; i
++) {
50 rc
= of_parse_phandle_with_args(np
, "phandle-list",
51 "#phandle-cells", i
, &args
);
53 /* Test the values from tests-phandle.dtsi */
57 passed
&= (args
.args_count
== 1);
58 passed
&= (args
.args
[0] == (i
+ 1));
62 passed
&= (args
.args_count
== 2);
63 passed
&= (args
.args
[0] == (i
+ 1));
64 passed
&= (args
.args
[1] == 0);
67 passed
&= (rc
== -ENOENT
);
71 passed
&= (args
.args_count
== 3);
72 passed
&= (args
.args
[0] == (i
+ 1));
73 passed
&= (args
.args
[1] == 4);
74 passed
&= (args
.args
[2] == 3);
78 passed
&= (args
.args_count
== 2);
79 passed
&= (args
.args
[0] == (i
+ 1));
80 passed
&= (args
.args
[1] == 100);
84 passed
&= (args
.args_count
== 0);
88 passed
&= (args
.args_count
== 1);
89 passed
&= (args
.args
[0] == (i
+ 1));
92 passed
&= (rc
== -ENOENT
);
98 selftest(passed
, "index %i - data error on node %s rc=%i\n",
99 i
, args
.np
->full_name
, rc
);
102 /* Check for missing list property */
103 rc
= of_parse_phandle_with_args(np
, "phandle-list-missing",
104 "#phandle-cells", 0, &args
);
105 selftest(rc
== -ENOENT
, "expected:%i got:%i\n", -ENOENT
, rc
);
106 rc
= of_count_phandle_with_args(np
, "phandle-list-missing",
108 selftest(rc
== -ENOENT
, "expected:%i got:%i\n", -ENOENT
, rc
);
110 /* Check for missing cells property */
111 rc
= of_parse_phandle_with_args(np
, "phandle-list",
112 "#phandle-cells-missing", 0, &args
);
113 selftest(rc
== -EINVAL
, "expected:%i got:%i\n", -EINVAL
, rc
);
114 rc
= of_count_phandle_with_args(np
, "phandle-list",
115 "#phandle-cells-missing");
116 selftest(rc
== -EINVAL
, "expected:%i got:%i\n", -EINVAL
, rc
);
118 /* Check for bad phandle in list */
119 rc
= of_parse_phandle_with_args(np
, "phandle-list-bad-phandle",
120 "#phandle-cells", 0, &args
);
121 selftest(rc
== -EINVAL
, "expected:%i got:%i\n", -EINVAL
, rc
);
122 rc
= of_count_phandle_with_args(np
, "phandle-list-bad-phandle",
124 selftest(rc
== -EINVAL
, "expected:%i got:%i\n", -EINVAL
, rc
);
126 /* Check for incorrectly formed argument list */
127 rc
= of_parse_phandle_with_args(np
, "phandle-list-bad-args",
128 "#phandle-cells", 1, &args
);
129 selftest(rc
== -EINVAL
, "expected:%i got:%i\n", -EINVAL
, rc
);
130 rc
= of_count_phandle_with_args(np
, "phandle-list-bad-args",
132 selftest(rc
== -EINVAL
, "expected:%i got:%i\n", -EINVAL
, rc
);
135 static void __init
of_selftest_property_match_string(void)
137 struct device_node
*np
;
140 np
= of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
142 pr_err("No testcase data in device tree\n");
146 rc
= of_property_match_string(np
, "phandle-list-names", "first");
147 selftest(rc
== 0, "first expected:0 got:%i\n", rc
);
148 rc
= of_property_match_string(np
, "phandle-list-names", "second");
149 selftest(rc
== 1, "second expected:0 got:%i\n", rc
);
150 rc
= of_property_match_string(np
, "phandle-list-names", "third");
151 selftest(rc
== 2, "third expected:0 got:%i\n", rc
);
152 rc
= of_property_match_string(np
, "phandle-list-names", "fourth");
153 selftest(rc
== -ENODATA
, "unmatched string; rc=%i", rc
);
154 rc
= of_property_match_string(np
, "missing-property", "blah");
155 selftest(rc
== -EINVAL
, "missing property; rc=%i", rc
);
156 rc
= of_property_match_string(np
, "empty-property", "blah");
157 selftest(rc
== -ENODATA
, "empty property; rc=%i", rc
);
158 rc
= of_property_match_string(np
, "unterminated-string", "blah");
159 selftest(rc
== -EILSEQ
, "unterminated string; rc=%i", rc
);
162 static void __init
of_selftest_parse_interrupts(void)
164 struct device_node
*np
;
165 struct of_phandle_args args
;
168 np
= of_find_node_by_path("/testcase-data/interrupts/interrupts0");
170 pr_err("missing testcase data\n");
174 for (i
= 0; i
< 4; i
++) {
177 rc
= of_irq_parse_one(np
, i
, &args
);
180 passed
&= (args
.args_count
== 1);
181 passed
&= (args
.args
[0] == (i
+ 1));
183 selftest(passed
, "index %i - data error on node %s rc=%i\n",
184 i
, args
.np
->full_name
, rc
);
188 np
= of_find_node_by_path("/testcase-data/interrupts/interrupts1");
190 pr_err("missing testcase data\n");
194 for (i
= 0; i
< 4; i
++) {
197 rc
= of_irq_parse_one(np
, i
, &args
);
199 /* Test the values from tests-phandle.dtsi */
203 passed
&= (args
.args_count
== 1);
204 passed
&= (args
.args
[0] == 9);
208 passed
&= (args
.args_count
== 3);
209 passed
&= (args
.args
[0] == 10);
210 passed
&= (args
.args
[1] == 11);
211 passed
&= (args
.args
[2] == 12);
215 passed
&= (args
.args_count
== 2);
216 passed
&= (args
.args
[0] == 13);
217 passed
&= (args
.args
[1] == 14);
221 passed
&= (args
.args_count
== 2);
222 passed
&= (args
.args
[0] == 15);
223 passed
&= (args
.args
[1] == 16);
228 selftest(passed
, "index %i - data error on node %s rc=%i\n",
229 i
, args
.np
->full_name
, rc
);
234 static void __init
of_selftest_parse_interrupts_extended(void)
236 struct device_node
*np
;
237 struct of_phandle_args args
;
240 np
= of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0");
242 pr_err("missing testcase data\n");
246 for (i
= 0; i
< 7; i
++) {
248 rc
= of_irq_parse_one(np
, i
, &args
);
250 /* Test the values from tests-phandle.dtsi */
254 passed
&= (args
.args_count
== 1);
255 passed
&= (args
.args
[0] == 1);
259 passed
&= (args
.args_count
== 3);
260 passed
&= (args
.args
[0] == 2);
261 passed
&= (args
.args
[1] == 3);
262 passed
&= (args
.args
[2] == 4);
266 passed
&= (args
.args_count
== 2);
267 passed
&= (args
.args
[0] == 5);
268 passed
&= (args
.args
[1] == 6);
272 passed
&= (args
.args_count
== 1);
273 passed
&= (args
.args
[0] == 9);
277 passed
&= (args
.args_count
== 3);
278 passed
&= (args
.args
[0] == 10);
279 passed
&= (args
.args
[1] == 11);
280 passed
&= (args
.args
[2] == 12);
284 passed
&= (args
.args_count
== 2);
285 passed
&= (args
.args
[0] == 13);
286 passed
&= (args
.args
[1] == 14);
290 passed
&= (args
.args_count
== 1);
291 passed
&= (args
.args
[0] == 15);
297 selftest(passed
, "index %i - data error on node %s rc=%i\n",
298 i
, args
.np
->full_name
, rc
);
303 static struct of_device_id match_node_table
[] = {
304 { .data
= "A", .name
= "name0", }, /* Name alone is lowest priority */
305 { .data
= "B", .type
= "type1", }, /* followed by type alone */
307 { .data
= "Ca", .name
= "name2", .type
= "type1", }, /* followed by both together */
308 { .data
= "Cb", .name
= "name2", }, /* Only match when type doesn't match */
309 { .data
= "Cc", .name
= "name2", .type
= "type2", },
311 { .data
= "E", .compatible
= "compat3" },
312 { .data
= "G", .compatible
= "compat2", },
313 { .data
= "H", .compatible
= "compat2", .name
= "name5", },
314 { .data
= "I", .compatible
= "compat2", .type
= "type1", },
315 { .data
= "J", .compatible
= "compat2", .type
= "type1", .name
= "name8", },
316 { .data
= "K", .compatible
= "compat2", .name
= "name9", },
323 } match_node_tests
[] = {
324 { .path
= "/testcase-data/match-node/name0", .data
= "A", },
325 { .path
= "/testcase-data/match-node/name1", .data
= "B", },
326 { .path
= "/testcase-data/match-node/a/name2", .data
= "Ca", },
327 { .path
= "/testcase-data/match-node/b/name2", .data
= "Cb", },
328 { .path
= "/testcase-data/match-node/c/name2", .data
= "Cc", },
329 { .path
= "/testcase-data/match-node/name3", .data
= "E", },
330 { .path
= "/testcase-data/match-node/name4", .data
= "G", },
331 { .path
= "/testcase-data/match-node/name5", .data
= "H", },
332 { .path
= "/testcase-data/match-node/name6", .data
= "G", },
333 { .path
= "/testcase-data/match-node/name7", .data
= "I", },
334 { .path
= "/testcase-data/match-node/name8", .data
= "J", },
335 { .path
= "/testcase-data/match-node/name9", .data
= "K", },
338 static void __init
of_selftest_match_node(void)
340 struct device_node
*np
;
341 const struct of_device_id
*match
;
344 for (i
= 0; i
< ARRAY_SIZE(match_node_tests
); i
++) {
345 np
= of_find_node_by_path(match_node_tests
[i
].path
);
347 selftest(0, "missing testcase node %s\n",
348 match_node_tests
[i
].path
);
352 match
= of_match_node(match_node_table
, np
);
354 selftest(0, "%s didn't match anything\n",
355 match_node_tests
[i
].path
);
359 if (strcmp(match
->data
, match_node_tests
[i
].data
) != 0) {
360 selftest(0, "%s got wrong match. expected %s, got %s\n",
361 match_node_tests
[i
].path
, match_node_tests
[i
].data
,
362 (const char *)match
->data
);
365 selftest(1, "passed");
369 static int __init
of_selftest(void)
371 struct device_node
*np
;
373 np
= of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
375 pr_info("No testcase data in device tree; not running tests\n");
380 pr_info("start of selftest - you will see error messages\n");
381 of_selftest_parse_phandle_with_args();
382 of_selftest_property_match_string();
383 of_selftest_parse_interrupts();
384 of_selftest_parse_interrupts_extended();
385 of_selftest_match_node();
386 pr_info("end of selftest - %i passed, %i failed\n",
387 selftest_results
.passed
, selftest_results
.failed
);
390 late_initcall(of_selftest
);