2 * Self tests for device tree subsystem
5 #define pr_fmt(fmt) "### dt-test ### " fmt
9 #include <linux/errno.h>
10 #include <linux/hashtable.h>
11 #include <linux/module.h>
13 #include <linux/of_fdt.h>
14 #include <linux/of_irq.h>
15 #include <linux/of_platform.h>
16 #include <linux/list.h>
17 #include <linux/mutex.h>
18 #include <linux/slab.h>
19 #include <linux/device.h>
21 #include "of_private.h"
23 static struct selftest_results
{
29 static struct device_node
*nodes
[NO_OF_NODES
];
30 static int last_node_index
;
31 static bool selftest_live_tree
;
33 #define selftest(result, fmt, ...) { \
35 selftest_results.failed++; \
36 pr_err("FAIL %s():%i " fmt, __func__, __LINE__, ##__VA_ARGS__); \
38 selftest_results.passed++; \
39 pr_debug("pass %s():%i\n", __func__, __LINE__); \
43 static void __init
of_selftest_find_node_by_name(void)
45 struct device_node
*np
;
47 np
= of_find_node_by_path("/testcase-data");
48 selftest(np
&& !strcmp("/testcase-data", np
->full_name
),
49 "find /testcase-data failed\n");
52 /* Test if trailing '/' works */
53 np
= of_find_node_by_path("/testcase-data/");
54 selftest(!np
, "trailing '/' on /testcase-data/ should fail\n");
56 np
= of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
57 selftest(np
&& !strcmp("/testcase-data/phandle-tests/consumer-a", np
->full_name
),
58 "find /testcase-data/phandle-tests/consumer-a failed\n");
61 np
= of_find_node_by_path("testcase-alias");
62 selftest(np
&& !strcmp("/testcase-data", np
->full_name
),
63 "find testcase-alias failed\n");
66 /* Test if trailing '/' works on aliases */
67 np
= of_find_node_by_path("testcase-alias/");
68 selftest(!np
, "trailing '/' on testcase-alias/ should fail\n");
70 np
= of_find_node_by_path("testcase-alias/phandle-tests/consumer-a");
71 selftest(np
&& !strcmp("/testcase-data/phandle-tests/consumer-a", np
->full_name
),
72 "find testcase-alias/phandle-tests/consumer-a failed\n");
75 np
= of_find_node_by_path("/testcase-data/missing-path");
76 selftest(!np
, "non-existent path returned node %s\n", np
->full_name
);
79 np
= of_find_node_by_path("missing-alias");
80 selftest(!np
, "non-existent alias returned node %s\n", np
->full_name
);
83 np
= of_find_node_by_path("testcase-alias/missing-path");
84 selftest(!np
, "non-existent alias with relative path returned node %s\n", np
->full_name
);
88 static void __init
of_selftest_dynamic(void)
90 struct device_node
*np
;
91 struct property
*prop
;
93 np
= of_find_node_by_path("/testcase-data");
95 pr_err("missing testcase data\n");
99 /* Array of 4 properties for the purpose of testing */
100 prop
= kzalloc(sizeof(*prop
) * 4, GFP_KERNEL
);
102 selftest(0, "kzalloc() failed\n");
106 /* Add a new property - should pass*/
107 prop
->name
= "new-property";
108 prop
->value
= "new-property-data";
109 prop
->length
= strlen(prop
->value
);
110 selftest(of_add_property(np
, prop
) == 0, "Adding a new property failed\n");
112 /* Try to add an existing property - should fail */
114 prop
->name
= "new-property";
115 prop
->value
= "new-property-data-should-fail";
116 prop
->length
= strlen(prop
->value
);
117 selftest(of_add_property(np
, prop
) != 0,
118 "Adding an existing property should have failed\n");
120 /* Try to modify an existing property - should pass */
121 prop
->value
= "modify-property-data-should-pass";
122 prop
->length
= strlen(prop
->value
);
123 selftest(of_update_property(np
, prop
) == 0,
124 "Updating an existing property should have passed\n");
126 /* Try to modify non-existent property - should pass*/
128 prop
->name
= "modify-property";
129 prop
->value
= "modify-missing-property-data-should-pass";
130 prop
->length
= strlen(prop
->value
);
131 selftest(of_update_property(np
, prop
) == 0,
132 "Updating a missing property should have passed\n");
134 /* Remove property - should pass */
135 selftest(of_remove_property(np
, prop
) == 0,
136 "Removing a property should have passed\n");
138 /* Adding very large property - should pass */
140 prop
->name
= "large-property-PAGE_SIZEx8";
141 prop
->length
= PAGE_SIZE
* 8;
142 prop
->value
= kzalloc(prop
->length
, GFP_KERNEL
);
143 selftest(prop
->value
!= NULL
, "Unable to allocate large buffer\n");
145 selftest(of_add_property(np
, prop
) == 0,
146 "Adding a large property should have passed\n");
149 static int __init
of_selftest_check_node_linkage(struct device_node
*np
)
151 struct device_node
*child
, *allnext_index
= np
;
154 for_each_child_of_node(np
, child
) {
155 if (child
->parent
!= np
) {
156 pr_err("Child node %s links to wrong parent %s\n",
157 child
->name
, np
->name
);
161 while (allnext_index
&& allnext_index
!= child
)
162 allnext_index
= allnext_index
->allnext
;
163 if (allnext_index
!= child
) {
164 pr_err("Node %s is ordered differently in sibling and allnode lists\n",
169 rc
= of_selftest_check_node_linkage(child
);
178 static void __init
of_selftest_check_tree_linkage(void)
180 struct device_node
*np
;
181 int allnode_count
= 0, child_count
;
186 for_each_of_allnodes(np
)
188 child_count
= of_selftest_check_node_linkage(of_allnodes
);
190 selftest(child_count
> 0, "Device node data structure is corrupted\n");
191 selftest(child_count
== allnode_count
, "allnodes list size (%i) doesn't match"
192 "sibling lists size (%i)\n", allnode_count
, child_count
);
193 pr_debug("allnodes list size (%i); sibling lists size (%i)\n", allnode_count
, child_count
);
197 struct hlist_node node
;
198 struct device_node
*np
;
201 static DEFINE_HASHTABLE(phandle_ht
, 8);
202 static void __init
of_selftest_check_phandles(void)
204 struct device_node
*np
;
205 struct node_hash
*nh
;
206 struct hlist_node
*tmp
;
207 int i
, dup_count
= 0, phandle_count
= 0;
209 for_each_of_allnodes(np
) {
213 hash_for_each_possible(phandle_ht
, nh
, node
, np
->phandle
) {
214 if (nh
->np
->phandle
== np
->phandle
) {
215 pr_info("Duplicate phandle! %i used by %s and %s\n",
216 np
->phandle
, nh
->np
->full_name
, np
->full_name
);
222 nh
= kzalloc(sizeof(*nh
), GFP_KERNEL
);
227 hash_add(phandle_ht
, &nh
->node
, np
->phandle
);
230 selftest(dup_count
== 0, "Found %i duplicates in %i phandles\n",
231 dup_count
, phandle_count
);
234 hash_for_each_safe(phandle_ht
, i
, tmp
, nh
, node
) {
240 static void __init
of_selftest_parse_phandle_with_args(void)
242 struct device_node
*np
;
243 struct of_phandle_args args
;
246 np
= of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
248 pr_err("missing testcase data\n");
252 rc
= of_count_phandle_with_args(np
, "phandle-list", "#phandle-cells");
253 selftest(rc
== 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc
);
255 for (i
= 0; i
< 8; i
++) {
257 rc
= of_parse_phandle_with_args(np
, "phandle-list",
258 "#phandle-cells", i
, &args
);
260 /* Test the values from tests-phandle.dtsi */
264 passed
&= (args
.args_count
== 1);
265 passed
&= (args
.args
[0] == (i
+ 1));
269 passed
&= (args
.args_count
== 2);
270 passed
&= (args
.args
[0] == (i
+ 1));
271 passed
&= (args
.args
[1] == 0);
274 passed
&= (rc
== -ENOENT
);
278 passed
&= (args
.args_count
== 3);
279 passed
&= (args
.args
[0] == (i
+ 1));
280 passed
&= (args
.args
[1] == 4);
281 passed
&= (args
.args
[2] == 3);
285 passed
&= (args
.args_count
== 2);
286 passed
&= (args
.args
[0] == (i
+ 1));
287 passed
&= (args
.args
[1] == 100);
291 passed
&= (args
.args_count
== 0);
295 passed
&= (args
.args_count
== 1);
296 passed
&= (args
.args
[0] == (i
+ 1));
299 passed
&= (rc
== -ENOENT
);
305 selftest(passed
, "index %i - data error on node %s rc=%i\n",
306 i
, args
.np
->full_name
, rc
);
309 /* Check for missing list property */
310 rc
= of_parse_phandle_with_args(np
, "phandle-list-missing",
311 "#phandle-cells", 0, &args
);
312 selftest(rc
== -ENOENT
, "expected:%i got:%i\n", -ENOENT
, rc
);
313 rc
= of_count_phandle_with_args(np
, "phandle-list-missing",
315 selftest(rc
== -ENOENT
, "expected:%i got:%i\n", -ENOENT
, rc
);
317 /* Check for missing cells property */
318 rc
= of_parse_phandle_with_args(np
, "phandle-list",
319 "#phandle-cells-missing", 0, &args
);
320 selftest(rc
== -EINVAL
, "expected:%i got:%i\n", -EINVAL
, rc
);
321 rc
= of_count_phandle_with_args(np
, "phandle-list",
322 "#phandle-cells-missing");
323 selftest(rc
== -EINVAL
, "expected:%i got:%i\n", -EINVAL
, rc
);
325 /* Check for bad phandle in list */
326 rc
= of_parse_phandle_with_args(np
, "phandle-list-bad-phandle",
327 "#phandle-cells", 0, &args
);
328 selftest(rc
== -EINVAL
, "expected:%i got:%i\n", -EINVAL
, rc
);
329 rc
= of_count_phandle_with_args(np
, "phandle-list-bad-phandle",
331 selftest(rc
== -EINVAL
, "expected:%i got:%i\n", -EINVAL
, rc
);
333 /* Check for incorrectly formed argument list */
334 rc
= of_parse_phandle_with_args(np
, "phandle-list-bad-args",
335 "#phandle-cells", 1, &args
);
336 selftest(rc
== -EINVAL
, "expected:%i got:%i\n", -EINVAL
, rc
);
337 rc
= of_count_phandle_with_args(np
, "phandle-list-bad-args",
339 selftest(rc
== -EINVAL
, "expected:%i got:%i\n", -EINVAL
, rc
);
342 static void __init
of_selftest_property_match_string(void)
344 struct device_node
*np
;
347 np
= of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
349 pr_err("No testcase data in device tree\n");
353 rc
= of_property_match_string(np
, "phandle-list-names", "first");
354 selftest(rc
== 0, "first expected:0 got:%i\n", rc
);
355 rc
= of_property_match_string(np
, "phandle-list-names", "second");
356 selftest(rc
== 1, "second expected:0 got:%i\n", rc
);
357 rc
= of_property_match_string(np
, "phandle-list-names", "third");
358 selftest(rc
== 2, "third expected:0 got:%i\n", rc
);
359 rc
= of_property_match_string(np
, "phandle-list-names", "fourth");
360 selftest(rc
== -ENODATA
, "unmatched string; rc=%i", rc
);
361 rc
= of_property_match_string(np
, "missing-property", "blah");
362 selftest(rc
== -EINVAL
, "missing property; rc=%i", rc
);
363 rc
= of_property_match_string(np
, "empty-property", "blah");
364 selftest(rc
== -ENODATA
, "empty property; rc=%i", rc
);
365 rc
= of_property_match_string(np
, "unterminated-string", "blah");
366 selftest(rc
== -EILSEQ
, "unterminated string; rc=%i", rc
);
369 #define propcmp(p1, p2) (((p1)->length == (p2)->length) && \
370 (p1)->value && (p2)->value && \
371 !memcmp((p1)->value, (p2)->value, (p1)->length) && \
372 !strcmp((p1)->name, (p2)->name))
373 static void __init
of_selftest_property_copy(void)
375 #ifdef CONFIG_OF_DYNAMIC
376 struct property p1
= { .name
= "p1", .length
= 0, .value
= "" };
377 struct property p2
= { .name
= "p2", .length
= 5, .value
= "abcd" };
378 struct property
*new;
380 new = __of_prop_dup(&p1
, GFP_KERNEL
);
381 selftest(new && propcmp(&p1
, new), "empty property didn't copy correctly\n");
386 new = __of_prop_dup(&p2
, GFP_KERNEL
);
387 selftest(new && propcmp(&p2
, new), "non-empty property didn't copy correctly\n");
394 static void __init
of_selftest_changeset(void)
396 #ifdef CONFIG_OF_DYNAMIC
397 struct property
*ppadd
, padd
= { .name
= "prop-add", .length
= 0, .value
= "" };
398 struct property
*ppupdate
, pupdate
= { .name
= "prop-update", .length
= 5, .value
= "abcd" };
399 struct property
*ppremove
;
400 struct device_node
*n1
, *n2
, *n21
, *nremove
, *parent
;
401 struct of_changeset chgset
;
403 of_changeset_init(&chgset
);
404 n1
= __of_node_alloc("/testcase-data/changeset/n1", GFP_KERNEL
);
405 selftest(n1
, "testcase setup failure\n");
406 n2
= __of_node_alloc("/testcase-data/changeset/n2", GFP_KERNEL
);
407 selftest(n2
, "testcase setup failure\n");
408 n21
= __of_node_alloc("/testcase-data/changeset/n2/n21", GFP_KERNEL
);
409 selftest(n21
, "testcase setup failure %p\n", n21
);
410 nremove
= of_find_node_by_path("/testcase-data/changeset/node-remove");
411 selftest(nremove
, "testcase setup failure\n");
412 ppadd
= __of_prop_dup(&padd
, GFP_KERNEL
);
413 selftest(ppadd
, "testcase setup failure\n");
414 ppupdate
= __of_prop_dup(&pupdate
, GFP_KERNEL
);
415 selftest(ppupdate
, "testcase setup failure\n");
416 parent
= nremove
->parent
;
421 ppremove
= of_find_property(parent
, "prop-remove", NULL
);
422 selftest(ppremove
, "failed to find removal prop");
424 of_changeset_init(&chgset
);
425 selftest(!of_changeset_attach_node(&chgset
, n1
), "fail attach n1\n");
426 selftest(!of_changeset_attach_node(&chgset
, n2
), "fail attach n2\n");
427 selftest(!of_changeset_detach_node(&chgset
, nremove
), "fail remove node\n");
428 selftest(!of_changeset_attach_node(&chgset
, n21
), "fail attach n21\n");
429 selftest(!of_changeset_add_property(&chgset
, parent
, ppadd
), "fail add prop\n");
430 selftest(!of_changeset_update_property(&chgset
, parent
, ppupdate
), "fail update prop\n");
431 selftest(!of_changeset_remove_property(&chgset
, parent
, ppremove
), "fail remove prop\n");
432 mutex_lock(&of_mutex
);
433 selftest(!of_changeset_apply(&chgset
), "apply failed\n");
434 mutex_unlock(&of_mutex
);
436 mutex_lock(&of_mutex
);
437 selftest(!of_changeset_revert(&chgset
), "revert failed\n");
438 mutex_unlock(&of_mutex
);
440 of_changeset_destroy(&chgset
);
444 static void __init
of_selftest_parse_interrupts(void)
446 struct device_node
*np
;
447 struct of_phandle_args args
;
450 np
= of_find_node_by_path("/testcase-data/interrupts/interrupts0");
452 pr_err("missing testcase data\n");
456 for (i
= 0; i
< 4; i
++) {
459 rc
= of_irq_parse_one(np
, i
, &args
);
462 passed
&= (args
.args_count
== 1);
463 passed
&= (args
.args
[0] == (i
+ 1));
465 selftest(passed
, "index %i - data error on node %s rc=%i\n",
466 i
, args
.np
->full_name
, rc
);
470 np
= of_find_node_by_path("/testcase-data/interrupts/interrupts1");
472 pr_err("missing testcase data\n");
476 for (i
= 0; i
< 4; i
++) {
479 rc
= of_irq_parse_one(np
, i
, &args
);
481 /* Test the values from tests-phandle.dtsi */
485 passed
&= (args
.args_count
== 1);
486 passed
&= (args
.args
[0] == 9);
490 passed
&= (args
.args_count
== 3);
491 passed
&= (args
.args
[0] == 10);
492 passed
&= (args
.args
[1] == 11);
493 passed
&= (args
.args
[2] == 12);
497 passed
&= (args
.args_count
== 2);
498 passed
&= (args
.args
[0] == 13);
499 passed
&= (args
.args
[1] == 14);
503 passed
&= (args
.args_count
== 2);
504 passed
&= (args
.args
[0] == 15);
505 passed
&= (args
.args
[1] == 16);
510 selftest(passed
, "index %i - data error on node %s rc=%i\n",
511 i
, args
.np
->full_name
, rc
);
516 static void __init
of_selftest_parse_interrupts_extended(void)
518 struct device_node
*np
;
519 struct of_phandle_args args
;
522 np
= of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0");
524 pr_err("missing testcase data\n");
528 for (i
= 0; i
< 7; i
++) {
530 rc
= of_irq_parse_one(np
, i
, &args
);
532 /* Test the values from tests-phandle.dtsi */
536 passed
&= (args
.args_count
== 1);
537 passed
&= (args
.args
[0] == 1);
541 passed
&= (args
.args_count
== 3);
542 passed
&= (args
.args
[0] == 2);
543 passed
&= (args
.args
[1] == 3);
544 passed
&= (args
.args
[2] == 4);
548 passed
&= (args
.args_count
== 2);
549 passed
&= (args
.args
[0] == 5);
550 passed
&= (args
.args
[1] == 6);
554 passed
&= (args
.args_count
== 1);
555 passed
&= (args
.args
[0] == 9);
559 passed
&= (args
.args_count
== 3);
560 passed
&= (args
.args
[0] == 10);
561 passed
&= (args
.args
[1] == 11);
562 passed
&= (args
.args
[2] == 12);
566 passed
&= (args
.args_count
== 2);
567 passed
&= (args
.args
[0] == 13);
568 passed
&= (args
.args
[1] == 14);
572 passed
&= (args
.args_count
== 1);
573 passed
&= (args
.args
[0] == 15);
579 selftest(passed
, "index %i - data error on node %s rc=%i\n",
580 i
, args
.np
->full_name
, rc
);
585 static struct of_device_id match_node_table
[] = {
586 { .data
= "A", .name
= "name0", }, /* Name alone is lowest priority */
587 { .data
= "B", .type
= "type1", }, /* followed by type alone */
589 { .data
= "Ca", .name
= "name2", .type
= "type1", }, /* followed by both together */
590 { .data
= "Cb", .name
= "name2", }, /* Only match when type doesn't match */
591 { .data
= "Cc", .name
= "name2", .type
= "type2", },
593 { .data
= "E", .compatible
= "compat3" },
594 { .data
= "G", .compatible
= "compat2", },
595 { .data
= "H", .compatible
= "compat2", .name
= "name5", },
596 { .data
= "I", .compatible
= "compat2", .type
= "type1", },
597 { .data
= "J", .compatible
= "compat2", .type
= "type1", .name
= "name8", },
598 { .data
= "K", .compatible
= "compat2", .name
= "name9", },
605 } match_node_tests
[] = {
606 { .path
= "/testcase-data/match-node/name0", .data
= "A", },
607 { .path
= "/testcase-data/match-node/name1", .data
= "B", },
608 { .path
= "/testcase-data/match-node/a/name2", .data
= "Ca", },
609 { .path
= "/testcase-data/match-node/b/name2", .data
= "Cb", },
610 { .path
= "/testcase-data/match-node/c/name2", .data
= "Cc", },
611 { .path
= "/testcase-data/match-node/name3", .data
= "E", },
612 { .path
= "/testcase-data/match-node/name4", .data
= "G", },
613 { .path
= "/testcase-data/match-node/name5", .data
= "H", },
614 { .path
= "/testcase-data/match-node/name6", .data
= "G", },
615 { .path
= "/testcase-data/match-node/name7", .data
= "I", },
616 { .path
= "/testcase-data/match-node/name8", .data
= "J", },
617 { .path
= "/testcase-data/match-node/name9", .data
= "K", },
620 static void __init
of_selftest_match_node(void)
622 struct device_node
*np
;
623 const struct of_device_id
*match
;
626 for (i
= 0; i
< ARRAY_SIZE(match_node_tests
); i
++) {
627 np
= of_find_node_by_path(match_node_tests
[i
].path
);
629 selftest(0, "missing testcase node %s\n",
630 match_node_tests
[i
].path
);
634 match
= of_match_node(match_node_table
, np
);
636 selftest(0, "%s didn't match anything\n",
637 match_node_tests
[i
].path
);
641 if (strcmp(match
->data
, match_node_tests
[i
].data
) != 0) {
642 selftest(0, "%s got wrong match. expected %s, got %s\n",
643 match_node_tests
[i
].path
, match_node_tests
[i
].data
,
644 (const char *)match
->data
);
647 selftest(1, "passed");
651 static void __init
of_selftest_platform_populate(void)
654 struct device_node
*np
, *child
;
655 struct platform_device
*pdev
;
656 struct of_device_id match
[] = {
657 { .compatible
= "test-device", },
661 np
= of_find_node_by_path("/testcase-data");
662 of_platform_populate(np
, of_default_bus_match_table
, NULL
, NULL
);
664 /* Test that a missing irq domain returns -EPROBE_DEFER */
665 np
= of_find_node_by_path("/testcase-data/testcase-device1");
666 pdev
= of_find_device_by_node(np
);
667 selftest(pdev
, "device 1 creation failed\n");
669 irq
= platform_get_irq(pdev
, 0);
670 selftest(irq
== -EPROBE_DEFER
, "device deferred probe failed - %d\n", irq
);
672 /* Test that a parsing failure does not return -EPROBE_DEFER */
673 np
= of_find_node_by_path("/testcase-data/testcase-device2");
674 pdev
= of_find_device_by_node(np
);
675 selftest(pdev
, "device 2 creation failed\n");
676 irq
= platform_get_irq(pdev
, 0);
677 selftest(irq
< 0 && irq
!= -EPROBE_DEFER
, "device parsing error failed - %d\n", irq
);
679 np
= of_find_node_by_path("/testcase-data/platform-tests");
681 pr_err("No testcase data in device tree\n");
685 for_each_child_of_node(np
, child
) {
686 struct device_node
*grandchild
;
687 of_platform_populate(child
, match
, NULL
, NULL
);
688 for_each_child_of_node(child
, grandchild
)
689 selftest(of_find_device_by_node(grandchild
),
690 "Could not create device for node '%s'\n",
696 * update_node_properties - adds the properties
697 * of np into dup node (present in live tree) and
698 * updates parent of children of np to dup.
700 * @np: node already present in live tree
701 * @dup: node present in live tree to be updated
703 static void update_node_properties(struct device_node
*np
,
704 struct device_node
*dup
)
706 struct property
*prop
;
707 struct device_node
*child
;
709 for_each_property_of_node(np
, prop
)
710 of_add_property(dup
, prop
);
712 for_each_child_of_node(np
, child
)
717 * attach_node_and_children - attaches nodes
718 * and its children to live tree
720 * @np: Node to attach to live tree
722 static int attach_node_and_children(struct device_node
*np
)
724 struct device_node
*next
, *root
= np
, *dup
;
728 /* storing a copy in temporary node */
732 if (WARN_ON(last_node_index
>= NO_OF_NODES
))
734 nodes
[last_node_index
++] = dup
;
741 dup
= of_find_node_by_path(np
->full_name
);
743 update_node_properties(np
, dup
);
746 if (np
->parent
== root
)
747 np
->parent
= of_allnodes
;
757 * selftest_data_add - Reads, copies data from
758 * linked tree and attaches it to the live tree
760 static int __init
selftest_data_add(void)
763 struct device_node
*selftest_data_node
, *np
;
764 extern uint8_t __dtb_testcases_begin
[];
765 extern uint8_t __dtb_testcases_end
[];
766 const int size
= __dtb_testcases_end
- __dtb_testcases_begin
;
770 pr_warn("%s: No testcase data to attach; not running tests\n",
776 selftest_data
= kmemdup(__dtb_testcases_begin
, size
, GFP_KERNEL
);
778 if (!selftest_data
) {
779 pr_warn("%s: Failed to allocate memory for selftest_data; "
780 "not running tests\n", __func__
);
783 of_fdt_unflatten_tree(selftest_data
, &selftest_data_node
);
784 if (!selftest_data_node
) {
785 pr_warn("%s: No tree to attach; not running tests\n", __func__
);
788 of_node_set_flag(selftest_data_node
, OF_DETACHED
);
789 rc
= of_resolve_phandles(selftest_data_node
);
791 pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__
, rc
);
796 /* enabling flag for removing nodes */
797 selftest_live_tree
= true;
798 of_allnodes
= selftest_data_node
;
800 for_each_of_allnodes(np
)
801 __of_attach_node_sysfs(np
);
802 of_aliases
= of_find_node_by_path("/aliases");
803 of_chosen
= of_find_node_by_path("/chosen");
807 /* attach the sub-tree to live tree */
808 return attach_node_and_children(selftest_data_node
);
812 * detach_node_and_children - detaches node
813 * and its children from live tree
815 * @np: Node to detach from live tree
817 static void detach_node_and_children(struct device_node
*np
)
820 detach_node_and_children(np
->child
);
825 * selftest_data_remove - removes the selftest data
826 * nodes from the live tree
828 static void selftest_data_remove(void)
830 struct device_node
*np
;
831 struct property
*prop
;
833 if (selftest_live_tree
) {
834 of_node_put(of_aliases
);
835 of_node_put(of_chosen
);
838 for_each_child_of_node(of_allnodes
, np
)
839 detach_node_and_children(np
);
840 __of_detach_node_sysfs(of_allnodes
);
845 while (last_node_index
>= 0) {
846 if (nodes
[last_node_index
]) {
847 np
= of_find_node_by_path(nodes
[last_node_index
]->full_name
);
848 if (strcmp(np
->full_name
, "/aliases") != 0) {
849 detach_node_and_children(np
);
851 for_each_property_of_node(np
, prop
) {
852 if (strcmp(prop
->name
, "testcase-alias") == 0)
853 of_remove_property(np
, prop
);
861 static int __init
of_selftest(void)
863 struct device_node
*np
;
866 /* adding data for selftest */
867 res
= selftest_data_add();
871 np
= of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
873 pr_info("No testcase data in device tree; not running tests\n");
878 pr_info("start of selftest - you will see error messages\n");
879 of_selftest_check_tree_linkage();
880 of_selftest_check_phandles();
881 of_selftest_find_node_by_name();
882 of_selftest_dynamic();
883 of_selftest_parse_phandle_with_args();
884 of_selftest_property_match_string();
885 of_selftest_property_copy();
886 of_selftest_changeset();
887 of_selftest_parse_interrupts();
888 of_selftest_parse_interrupts_extended();
889 of_selftest_match_node();
890 of_selftest_platform_populate();
892 /* removing selftest data from live tree */
893 selftest_data_remove();
895 /* Double check linkage after removing testcase data */
896 of_selftest_check_tree_linkage();
898 pr_info("end of selftest - %i passed, %i failed\n",
899 selftest_results
.passed
, selftest_results
.failed
);
903 late_initcall(of_selftest
);