1
2
3
4
5
6#include "dtc.h"
7#include "srcpos.h"
8
9#ifdef TRACE_CHECKS
10#define TRACE(c, ...) \
11 do { \
12 fprintf(stderr, "=== %s: ", (c)->name); \
13 fprintf(stderr, __VA_ARGS__); \
14 fprintf(stderr, "\n"); \
15 } while (0)
16#else
17#define TRACE(c, fmt, ...) do { } while (0)
18#endif
19
20enum checkstatus {
21 UNCHECKED = 0,
22 PREREQ,
23 PASSED,
24 FAILED,
25};
26
27struct check;
28
29typedef void (*check_fn)(struct check *c, struct dt_info *dti, struct node *node);
30
31struct check {
32 const char *name;
33 check_fn fn;
34 void *data;
35 bool warn, error;
36 enum checkstatus status;
37 bool inprogress;
38 int num_prereqs;
39 struct check **prereq;
40};
41
42#define CHECK_ENTRY(nm_, fn_, d_, w_, e_, ...) \
43 static struct check *nm_##_prereqs[] = { __VA_ARGS__ }; \
44 static struct check nm_ = { \
45 .name = #nm_, \
46 .fn = (fn_), \
47 .data = (d_), \
48 .warn = (w_), \
49 .error = (e_), \
50 .status = UNCHECKED, \
51 .num_prereqs = ARRAY_SIZE(nm_##_prereqs), \
52 .prereq = nm_##_prereqs, \
53 };
54#define WARNING(nm_, fn_, d_, ...) \
55 CHECK_ENTRY(nm_, fn_, d_, true, false, __VA_ARGS__)
56#define ERROR(nm_, fn_, d_, ...) \
57 CHECK_ENTRY(nm_, fn_, d_, false, true, __VA_ARGS__)
58#define CHECK(nm_, fn_, d_, ...) \
59 CHECK_ENTRY(nm_, fn_, d_, false, false, __VA_ARGS__)
60
61static inline void PRINTF(5, 6) check_msg(struct check *c, struct dt_info *dti,
62 struct node *node,
63 struct property *prop,
64 const char *fmt, ...)
65{
66 va_list ap;
67 char *str = NULL;
68 struct srcpos *pos = NULL;
69 char *file_str;
70
71 if (!(c->warn && (quiet < 1)) && !(c->error && (quiet < 2)))
72 return;
73
74 if (prop && prop->srcpos)
75 pos = prop->srcpos;
76 else if (node && node->srcpos)
77 pos = node->srcpos;
78
79 if (pos) {
80 file_str = srcpos_string(pos);
81 xasprintf(&str, "%s", file_str);
82 free(file_str);
83 } else if (streq(dti->outname, "-")) {
84 xasprintf(&str, "<stdout>");
85 } else {
86 xasprintf(&str, "%s", dti->outname);
87 }
88
89 xasprintf_append(&str, ": %s (%s): ",
90 (c->error) ? "ERROR" : "Warning", c->name);
91
92 if (node) {
93 if (prop)
94 xasprintf_append(&str, "%s:%s: ", node->fullpath, prop->name);
95 else
96 xasprintf_append(&str, "%s: ", node->fullpath);
97 }
98
99 va_start(ap, fmt);
100 xavsprintf_append(&str, fmt, ap);
101 va_end(ap);
102
103 xasprintf_append(&str, "\n");
104
105 if (!prop && pos) {
106 pos = node->srcpos;
107 while (pos->next) {
108 pos = pos->next;
109
110 file_str = srcpos_string(pos);
111 xasprintf_append(&str, " also defined at %s\n", file_str);
112 free(file_str);
113 }
114 }
115
116 fputs(str, stderr);
117}
118
119#define FAIL(c, dti, node, ...) \
120 do { \
121 TRACE((c), "\t\tFAILED at %s:%d", __FILE__, __LINE__); \
122 (c)->status = FAILED; \
123 check_msg((c), dti, node, NULL, __VA_ARGS__); \
124 } while (0)
125
126#define FAIL_PROP(c, dti, node, prop, ...) \
127 do { \
128 TRACE((c), "\t\tFAILED at %s:%d", __FILE__, __LINE__); \
129 (c)->status = FAILED; \
130 check_msg((c), dti, node, prop, __VA_ARGS__); \
131 } while (0)
132
133
134static void check_nodes_props(struct check *c, struct dt_info *dti, struct node *node)
135{
136 struct node *child;
137
138 TRACE(c, "%s", node->fullpath);
139 if (c->fn)
140 c->fn(c, dti, node);
141
142 for_each_child(node, child)
143 check_nodes_props(c, dti, child);
144}
145
146static bool run_check(struct check *c, struct dt_info *dti)
147{
148 struct node *dt = dti->dt;
149 bool error = false;
150 int i;
151
152 assert(!c->inprogress);
153
154 if (c->status != UNCHECKED)
155 goto out;
156
157 c->inprogress = true;
158
159 for (i = 0; i < c->num_prereqs; i++) {
160 struct check *prq = c->prereq[i];
161 error = error || run_check(prq, dti);
162 if (prq->status != PASSED) {
163 c->status = PREREQ;
164 check_msg(c, dti, NULL, NULL, "Failed prerequisite '%s'",
165 c->prereq[i]->name);
166 }
167 }
168
169 if (c->status != UNCHECKED)
170 goto out;
171
172 check_nodes_props(c, dti, dt);
173
174 if (c->status == UNCHECKED)
175 c->status = PASSED;
176
177 TRACE(c, "\tCompleted, status %d", c->status);
178
179out:
180 c->inprogress = false;
181 if ((c->status != PASSED) && (c->error))
182 error = true;
183 return error;
184}
185
186
187
188
189
190
191static inline void check_always_fail(struct check *c, struct dt_info *dti,
192 struct node *node)
193{
194 FAIL(c, dti, node, "always_fail check");
195}
196CHECK(always_fail, check_always_fail, NULL);
197
198static void check_is_string(struct check *c, struct dt_info *dti,
199 struct node *node)
200{
201 struct property *prop;
202 char *propname = c->data;
203
204 prop = get_property(node, propname);
205 if (!prop)
206 return;
207
208 if (!data_is_one_string(prop->val))
209 FAIL_PROP(c, dti, node, prop, "property is not a string");
210}
211#define WARNING_IF_NOT_STRING(nm, propname) \
212 WARNING(nm, check_is_string, (propname))
213#define ERROR_IF_NOT_STRING(nm, propname) \
214 ERROR(nm, check_is_string, (propname))
215
216static void check_is_string_list(struct check *c, struct dt_info *dti,
217 struct node *node)
218{
219 int rem, l;
220 struct property *prop;
221 char *propname = c->data;
222 char *str;
223
224 prop = get_property(node, propname);
225 if (!prop)
226 return;
227
228 str = prop->val.val;
229 rem = prop->val.len;
230 while (rem > 0) {
231 l = strnlen(str, rem);
232 if (l == rem) {
233 FAIL_PROP(c, dti, node, prop, "property is not a string list");
234 break;
235 }
236 rem -= l + 1;
237 str += l + 1;
238 }
239}
240#define WARNING_IF_NOT_STRING_LIST(nm, propname) \
241 WARNING(nm, check_is_string_list, (propname))
242#define ERROR_IF_NOT_STRING_LIST(nm, propname) \
243 ERROR(nm, check_is_string_list, (propname))
244
245static void check_is_cell(struct check *c, struct dt_info *dti,
246 struct node *node)
247{
248 struct property *prop;
249 char *propname = c->data;
250
251 prop = get_property(node, propname);
252 if (!prop)
253 return;
254
255 if (prop->val.len != sizeof(cell_t))
256 FAIL_PROP(c, dti, node, prop, "property is not a single cell");
257}
258#define WARNING_IF_NOT_CELL(nm, propname) \
259 WARNING(nm, check_is_cell, (propname))
260#define ERROR_IF_NOT_CELL(nm, propname) \
261 ERROR(nm, check_is_cell, (propname))
262
263
264
265
266
267static void check_duplicate_node_names(struct check *c, struct dt_info *dti,
268 struct node *node)
269{
270 struct node *child, *child2;
271
272 for_each_child(node, child)
273 for (child2 = child->next_sibling;
274 child2;
275 child2 = child2->next_sibling)
276 if (streq(child->name, child2->name))
277 FAIL(c, dti, child2, "Duplicate node name");
278}
279ERROR(duplicate_node_names, check_duplicate_node_names, NULL);
280
281static void check_duplicate_property_names(struct check *c, struct dt_info *dti,
282 struct node *node)
283{
284 struct property *prop, *prop2;
285
286 for_each_property(node, prop) {
287 for (prop2 = prop->next; prop2; prop2 = prop2->next) {
288 if (prop2->deleted)
289 continue;
290 if (streq(prop->name, prop2->name))
291 FAIL_PROP(c, dti, node, prop, "Duplicate property name");
292 }
293 }
294}
295ERROR(duplicate_property_names, check_duplicate_property_names, NULL);
296
297#define LOWERCASE "abcdefghijklmnopqrstuvwxyz"
298#define UPPERCASE "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
299#define DIGITS "0123456789"
300#define PROPNODECHARS LOWERCASE UPPERCASE DIGITS ",._+*#?-"
301#define PROPNODECHARSSTRICT LOWERCASE UPPERCASE DIGITS ",-"
302
303static void check_node_name_chars(struct check *c, struct dt_info *dti,
304 struct node *node)
305{
306 int n = strspn(node->name, c->data);
307
308 if (n < strlen(node->name))
309 FAIL(c, dti, node, "Bad character '%c' in node name",
310 node->name[n]);
311}
312ERROR(node_name_chars, check_node_name_chars, PROPNODECHARS "@");
313
314static void check_node_name_chars_strict(struct check *c, struct dt_info *dti,
315 struct node *node)
316{
317 int n = strspn(node->name, c->data);
318
319 if (n < node->basenamelen)
320 FAIL(c, dti, node, "Character '%c' not recommended in node name",
321 node->name[n]);
322}
323CHECK(node_name_chars_strict, check_node_name_chars_strict, PROPNODECHARSSTRICT);
324
325static void check_node_name_format(struct check *c, struct dt_info *dti,
326 struct node *node)
327{
328 if (strchr(get_unitname(node), '@'))
329 FAIL(c, dti, node, "multiple '@' characters in node name");
330}
331ERROR(node_name_format, check_node_name_format, NULL, &node_name_chars);
332
333static void check_unit_address_vs_reg(struct check *c, struct dt_info *dti,
334 struct node *node)
335{
336 const char *unitname = get_unitname(node);
337 struct property *prop = get_property(node, "reg");
338
339 if (get_subnode(node, "__overlay__")) {
340
341 return;
342 }
343
344 if (!prop) {
345 prop = get_property(node, "ranges");
346 if (prop && !prop->val.len)
347 prop = NULL;
348 }
349
350 if (prop) {
351 if (!unitname[0])
352 FAIL(c, dti, node, "node has a reg or ranges property, but no unit name");
353 } else {
354 if (unitname[0])
355 FAIL(c, dti, node, "node has a unit name, but no reg or ranges property");
356 }
357}
358WARNING(unit_address_vs_reg, check_unit_address_vs_reg, NULL);
359
360static void check_property_name_chars(struct check *c, struct dt_info *dti,
361 struct node *node)
362{
363 struct property *prop;
364
365 for_each_property(node, prop) {
366 int n = strspn(prop->name, c->data);
367
368 if (n < strlen(prop->name))
369 FAIL_PROP(c, dti, node, prop, "Bad character '%c' in property name",
370 prop->name[n]);
371 }
372}
373ERROR(property_name_chars, check_property_name_chars, PROPNODECHARS);
374
375static void check_property_name_chars_strict(struct check *c,
376 struct dt_info *dti,
377 struct node *node)
378{
379 struct property *prop;
380
381 for_each_property(node, prop) {
382 const char *name = prop->name;
383 int n = strspn(name, c->data);
384
385 if (n == strlen(prop->name))
386 continue;
387
388
389 if (streq(name, "device_type"))
390 continue;
391
392
393
394
395
396 if (name[n] == '#' && ((n == 0) || (name[n-1] == ','))) {
397 name += n + 1;
398 n = strspn(name, c->data);
399 }
400 if (n < strlen(name))
401 FAIL_PROP(c, dti, node, prop, "Character '%c' not recommended in property name",
402 name[n]);
403 }
404}
405CHECK(property_name_chars_strict, check_property_name_chars_strict, PROPNODECHARSSTRICT);
406
407#define DESCLABEL_FMT "%s%s%s%s%s"
408#define DESCLABEL_ARGS(node,prop,mark) \
409 ((mark) ? "value of " : ""), \
410 ((prop) ? "'" : ""), \
411 ((prop) ? (prop)->name : ""), \
412 ((prop) ? "' in " : ""), (node)->fullpath
413
414static void check_duplicate_label(struct check *c, struct dt_info *dti,
415 const char *label, struct node *node,
416 struct property *prop, struct marker *mark)
417{
418 struct node *dt = dti->dt;
419 struct node *othernode = NULL;
420 struct property *otherprop = NULL;
421 struct marker *othermark = NULL;
422
423 othernode = get_node_by_label(dt, label);
424
425 if (!othernode)
426 otherprop = get_property_by_label(dt, label, &othernode);
427 if (!othernode)
428 othermark = get_marker_label(dt, label, &othernode,
429 &otherprop);
430
431 if (!othernode)
432 return;
433
434 if ((othernode != node) || (otherprop != prop) || (othermark != mark))
435 FAIL(c, dti, node, "Duplicate label '%s' on " DESCLABEL_FMT
436 " and " DESCLABEL_FMT,
437 label, DESCLABEL_ARGS(node, prop, mark),
438 DESCLABEL_ARGS(othernode, otherprop, othermark));
439}
440
441static void check_duplicate_label_node(struct check *c, struct dt_info *dti,
442 struct node *node)
443{
444 struct label *l;
445 struct property *prop;
446
447 for_each_label(node->labels, l)
448 check_duplicate_label(c, dti, l->label, node, NULL, NULL);
449
450 for_each_property(node, prop) {
451 struct marker *m = prop->val.markers;
452
453 for_each_label(prop->labels, l)
454 check_duplicate_label(c, dti, l->label, node, prop, NULL);
455
456 for_each_marker_of_type(m, LABEL)
457 check_duplicate_label(c, dti, m->ref, node, prop, m);
458 }
459}
460ERROR(duplicate_label, check_duplicate_label_node, NULL);
461
462static cell_t check_phandle_prop(struct check *c, struct dt_info *dti,
463 struct node *node, const char *propname)
464{
465 struct node *root = dti->dt;
466 struct property *prop;
467 struct marker *m;
468 cell_t phandle;
469
470 prop = get_property(node, propname);
471 if (!prop)
472 return 0;
473
474 if (prop->val.len != sizeof(cell_t)) {
475 FAIL_PROP(c, dti, node, prop, "bad length (%d) %s property",
476 prop->val.len, prop->name);
477 return 0;
478 }
479
480 m = prop->val.markers;
481 for_each_marker_of_type(m, REF_PHANDLE) {
482 assert(m->offset == 0);
483 if (node != get_node_by_ref(root, m->ref))
484
485
486 {
487 FAIL(c, dti, node, "%s is a reference to another node",
488 prop->name);
489 }
490
491
492
493
494
495 return 0;
496 }
497
498 phandle = propval_cell(prop);
499
500 if ((phandle == 0) || (phandle == -1)) {
501 FAIL_PROP(c, dti, node, prop, "bad value (0x%x) in %s property",
502 phandle, prop->name);
503 return 0;
504 }
505
506 return phandle;
507}
508
509static void check_explicit_phandles(struct check *c, struct dt_info *dti,
510 struct node *node)
511{
512 struct node *root = dti->dt;
513 struct node *other;
514 cell_t phandle, linux_phandle;
515
516
517 assert(!node->phandle);
518
519 phandle = check_phandle_prop(c, dti, node, "phandle");
520
521 linux_phandle = check_phandle_prop(c, dti, node, "linux,phandle");
522
523 if (!phandle && !linux_phandle)
524
525 return;
526
527 if (linux_phandle && phandle && (phandle != linux_phandle))
528 FAIL(c, dti, node, "mismatching 'phandle' and 'linux,phandle'"
529 " properties");
530
531 if (linux_phandle && !phandle)
532 phandle = linux_phandle;
533
534 other = get_node_by_phandle(root, phandle);
535 if (other && (other != node)) {
536 FAIL(c, dti, node, "duplicated phandle 0x%x (seen before at %s)",
537 phandle, other->fullpath);
538 return;
539 }
540
541 node->phandle = phandle;
542}
543ERROR(explicit_phandles, check_explicit_phandles, NULL);
544
545static void check_name_properties(struct check *c, struct dt_info *dti,
546 struct node *node)
547{
548 struct property **pp, *prop = NULL;
549
550 for (pp = &node->proplist; *pp; pp = &((*pp)->next))
551 if (streq((*pp)->name, "name")) {
552 prop = *pp;
553 break;
554 }
555
556 if (!prop)
557 return;
558
559 if ((prop->val.len != node->basenamelen+1)
560 || (memcmp(prop->val.val, node->name, node->basenamelen) != 0)) {
561 FAIL(c, dti, node, "\"name\" property is incorrect (\"%s\" instead"
562 " of base node name)", prop->val.val);
563 } else {
564
565
566 *pp = prop->next;
567 free(prop->name);
568 data_free(prop->val);
569 free(prop);
570 }
571}
572ERROR_IF_NOT_STRING(name_is_string, "name");
573ERROR(name_properties, check_name_properties, NULL, &name_is_string);
574
575
576
577
578
579static void fixup_phandle_references(struct check *c, struct dt_info *dti,
580 struct node *node)
581{
582 struct node *dt = dti->dt;
583 struct property *prop;
584
585 for_each_property(node, prop) {
586 struct marker *m = prop->val.markers;
587 struct node *refnode;
588 cell_t phandle;
589
590 for_each_marker_of_type(m, REF_PHANDLE) {
591 assert(m->offset + sizeof(cell_t) <= prop->val.len);
592
593 refnode = get_node_by_ref(dt, m->ref);
594 if (! refnode) {
595 if (!(dti->dtsflags & DTSF_PLUGIN))
596 FAIL(c, dti, node, "Reference to non-existent node or "
597 "label \"%s\"\n", m->ref);
598 else
599 *((fdt32_t *)(prop->val.val + m->offset)) =
600 cpu_to_fdt32(0xffffffff);
601 continue;
602 }
603
604 phandle = get_node_phandle(dt, refnode);
605 *((fdt32_t *)(prop->val.val + m->offset)) = cpu_to_fdt32(phandle);
606
607 reference_node(refnode);
608 }
609 }
610}
611ERROR(phandle_references, fixup_phandle_references, NULL,
612 &duplicate_node_names, &explicit_phandles);
613
614static void fixup_path_references(struct check *c, struct dt_info *dti,
615 struct node *node)
616{
617 struct node *dt = dti->dt;
618 struct property *prop;
619
620 for_each_property(node, prop) {
621 struct marker *m = prop->val.markers;
622 struct node *refnode;
623 char *path;
624
625 for_each_marker_of_type(m, REF_PATH) {
626 assert(m->offset <= prop->val.len);
627
628 refnode = get_node_by_ref(dt, m->ref);
629 if (!refnode) {
630 FAIL(c, dti, node, "Reference to non-existent node or label \"%s\"\n",
631 m->ref);
632 continue;
633 }
634
635 path = refnode->fullpath;
636 prop->val = data_insert_at_marker(prop->val, m, path,
637 strlen(path) + 1);
638
639 reference_node(refnode);
640 }
641 }
642}
643ERROR(path_references, fixup_path_references, NULL, &duplicate_node_names);
644
645static void fixup_omit_unused_nodes(struct check *c, struct dt_info *dti,
646 struct node *node)
647{
648 if (generate_symbols && node->labels)
649 return;
650 if (node->omit_if_unused && !node->is_referenced)
651 delete_node(node);
652}
653ERROR(omit_unused_nodes, fixup_omit_unused_nodes, NULL, &phandle_references, &path_references);
654
655
656
657
658WARNING_IF_NOT_CELL(address_cells_is_cell, "#address-cells");
659WARNING_IF_NOT_CELL(size_cells_is_cell, "#size-cells");
660WARNING_IF_NOT_CELL(interrupt_cells_is_cell, "#interrupt-cells");
661
662WARNING_IF_NOT_STRING(device_type_is_string, "device_type");
663WARNING_IF_NOT_STRING(model_is_string, "model");
664WARNING_IF_NOT_STRING(status_is_string, "status");
665WARNING_IF_NOT_STRING(label_is_string, "label");
666
667WARNING_IF_NOT_STRING_LIST(compatible_is_string_list, "compatible");
668
669static void check_names_is_string_list(struct check *c, struct dt_info *dti,
670 struct node *node)
671{
672 struct property *prop;
673
674 for_each_property(node, prop) {
675 const char *s = strrchr(prop->name, '-');
676 if (!s || !streq(s, "-names"))
677 continue;
678
679 c->data = prop->name;
680 check_is_string_list(c, dti, node);
681 }
682}
683WARNING(names_is_string_list, check_names_is_string_list, NULL);
684
685static void check_alias_paths(struct check *c, struct dt_info *dti,
686 struct node *node)
687{
688 struct property *prop;
689
690 if (!streq(node->name, "aliases"))
691 return;
692
693 for_each_property(node, prop) {
694 if (streq(prop->name, "phandle")
695 || streq(prop->name, "linux,phandle")) {
696 continue;
697 }
698
699 if (!prop->val.val || !get_node_by_path(dti->dt, prop->val.val)) {
700 FAIL_PROP(c, dti, node, prop, "aliases property is not a valid node (%s)",
701 prop->val.val);
702 continue;
703 }
704 if (strspn(prop->name, LOWERCASE DIGITS "-") != strlen(prop->name))
705 FAIL(c, dti, node, "aliases property name must include only lowercase and '-'");
706 }
707}
708WARNING(alias_paths, check_alias_paths, NULL);
709
710static void fixup_addr_size_cells(struct check *c, struct dt_info *dti,
711 struct node *node)
712{
713 struct property *prop;
714
715 node->addr_cells = -1;
716 node->size_cells = -1;
717
718 prop = get_property(node, "#address-cells");
719 if (prop)
720 node->addr_cells = propval_cell(prop);
721
722 prop = get_property(node, "#size-cells");
723 if (prop)
724 node->size_cells = propval_cell(prop);
725}
726WARNING(addr_size_cells, fixup_addr_size_cells, NULL,
727 &address_cells_is_cell, &size_cells_is_cell);
728
729#define node_addr_cells(n) \
730 (((n)->addr_cells == -1) ? 2 : (n)->addr_cells)
731#define node_size_cells(n) \
732 (((n)->size_cells == -1) ? 1 : (n)->size_cells)
733
734static void check_reg_format(struct check *c, struct dt_info *dti,
735 struct node *node)
736{
737 struct property *prop;
738 int addr_cells, size_cells, entrylen;
739
740 prop = get_property(node, "reg");
741 if (!prop)
742 return;
743
744 if (!node->parent) {
745 FAIL(c, dti, node, "Root node has a \"reg\" property");
746 return;
747 }
748
749 if (prop->val.len == 0)
750 FAIL_PROP(c, dti, node, prop, "property is empty");
751
752 addr_cells = node_addr_cells(node->parent);
753 size_cells = node_size_cells(node->parent);
754 entrylen = (addr_cells + size_cells) * sizeof(cell_t);
755
756 if (!entrylen || (prop->val.len % entrylen) != 0)
757 FAIL_PROP(c, dti, node, prop, "property has invalid length (%d bytes) "
758 "(#address-cells == %d, #size-cells == %d)",
759 prop->val.len, addr_cells, size_cells);
760}
761WARNING(reg_format, check_reg_format, NULL, &addr_size_cells);
762
763static void check_ranges_format(struct check *c, struct dt_info *dti,
764 struct node *node)
765{
766 struct property *prop;
767 int c_addr_cells, p_addr_cells, c_size_cells, p_size_cells, entrylen;
768 const char *ranges = c->data;
769
770 prop = get_property(node, ranges);
771 if (!prop)
772 return;
773
774 if (!node->parent) {
775 FAIL_PROP(c, dti, node, prop, "Root node has a \"%s\" property",
776 ranges);
777 return;
778 }
779
780 p_addr_cells = node_addr_cells(node->parent);
781 p_size_cells = node_size_cells(node->parent);
782 c_addr_cells = node_addr_cells(node);
783 c_size_cells = node_size_cells(node);
784 entrylen = (p_addr_cells + c_addr_cells + c_size_cells) * sizeof(cell_t);
785
786 if (prop->val.len == 0) {
787 if (p_addr_cells != c_addr_cells)
788 FAIL_PROP(c, dti, node, prop, "empty \"%s\" property but its "
789 "#address-cells (%d) differs from %s (%d)",
790 ranges, c_addr_cells, node->parent->fullpath,
791 p_addr_cells);
792 if (p_size_cells != c_size_cells)
793 FAIL_PROP(c, dti, node, prop, "empty \"%s\" property but its "
794 "#size-cells (%d) differs from %s (%d)",
795 ranges, c_size_cells, node->parent->fullpath,
796 p_size_cells);
797 } else if ((prop->val.len % entrylen) != 0) {
798 FAIL_PROP(c, dti, node, prop, "\"%s\" property has invalid length (%d bytes) "
799 "(parent #address-cells == %d, child #address-cells == %d, "
800 "#size-cells == %d)", ranges, prop->val.len,
801 p_addr_cells, c_addr_cells, c_size_cells);
802 }
803}
804WARNING(ranges_format, check_ranges_format, "ranges", &addr_size_cells);
805WARNING(dma_ranges_format, check_ranges_format, "dma-ranges", &addr_size_cells);
806
807static const struct bus_type pci_bus = {
808 .name = "PCI",
809};
810
811static void check_pci_bridge(struct check *c, struct dt_info *dti, struct node *node)
812{
813 struct property *prop;
814 cell_t *cells;
815
816 prop = get_property(node, "device_type");
817 if (!prop || !streq(prop->val.val, "pci"))
818 return;
819
820 node->bus = &pci_bus;
821
822 if (!strprefixeq(node->name, node->basenamelen, "pci") &&
823 !strprefixeq(node->name, node->basenamelen, "pcie"))
824 FAIL(c, dti, node, "node name is not \"pci\" or \"pcie\"");
825
826 prop = get_property(node, "ranges");
827 if (!prop)
828 FAIL(c, dti, node, "missing ranges for PCI bridge (or not a bridge)");
829
830 if (node_addr_cells(node) != 3)
831 FAIL(c, dti, node, "incorrect #address-cells for PCI bridge");
832 if (node_size_cells(node) != 2)
833 FAIL(c, dti, node, "incorrect #size-cells for PCI bridge");
834
835 prop = get_property(node, "bus-range");
836 if (!prop)
837 return;
838
839 if (prop->val.len != (sizeof(cell_t) * 2)) {
840 FAIL_PROP(c, dti, node, prop, "value must be 2 cells");
841 return;
842 }
843 cells = (cell_t *)prop->val.val;
844 if (fdt32_to_cpu(cells[0]) > fdt32_to_cpu(cells[1]))
845 FAIL_PROP(c, dti, node, prop, "1st cell must be less than or equal to 2nd cell");
846 if (fdt32_to_cpu(cells[1]) > 0xff)
847 FAIL_PROP(c, dti, node, prop, "maximum bus number must be less than 256");
848}
849WARNING(pci_bridge, check_pci_bridge, NULL,
850 &device_type_is_string, &addr_size_cells);
851
852static void check_pci_device_bus_num(struct check *c, struct dt_info *dti, struct node *node)
853{
854 struct property *prop;
855 unsigned int bus_num, min_bus, max_bus;
856 cell_t *cells;
857
858 if (!node->parent || (node->parent->bus != &pci_bus))
859 return;
860
861 prop = get_property(node, "reg");
862 if (!prop)
863 return;
864
865 cells = (cell_t *)prop->val.val;
866 bus_num = (fdt32_to_cpu(cells[0]) & 0x00ff0000) >> 16;
867
868 prop = get_property(node->parent, "bus-range");
869 if (!prop) {
870 min_bus = max_bus = 0;
871 } else {
872 cells = (cell_t *)prop->val.val;
873 min_bus = fdt32_to_cpu(cells[0]);
874 max_bus = fdt32_to_cpu(cells[0]);
875 }
876 if ((bus_num < min_bus) || (bus_num > max_bus))
877 FAIL_PROP(c, dti, node, prop, "PCI bus number %d out of range, expected (%d - %d)",
878 bus_num, min_bus, max_bus);
879}
880WARNING(pci_device_bus_num, check_pci_device_bus_num, NULL, ®_format, &pci_bridge);
881
882static void check_pci_device_reg(struct check *c, struct dt_info *dti, struct node *node)
883{
884 struct property *prop;
885 const char *unitname = get_unitname(node);
886 char unit_addr[5];
887 unsigned int dev, func, reg;
888 cell_t *cells;
889
890 if (!node->parent || (node->parent->bus != &pci_bus))
891 return;
892
893 prop = get_property(node, "reg");
894 if (!prop)
895 return;
896
897 cells = (cell_t *)prop->val.val;
898 if (cells[1] || cells[2])
899 FAIL_PROP(c, dti, node, prop, "PCI reg config space address cells 2 and 3 must be 0");
900
901 reg = fdt32_to_cpu(cells[0]);
902 dev = (reg & 0xf800) >> 11;
903 func = (reg & 0x700) >> 8;
904
905 if (reg & 0xff000000)
906 FAIL_PROP(c, dti, node, prop, "PCI reg address is not configuration space");
907 if (reg & 0x000000ff)
908 FAIL_PROP(c, dti, node, prop, "PCI reg config space address register number must be 0");
909
910 if (func == 0) {
911 snprintf(unit_addr, sizeof(unit_addr), "%x", dev);
912 if (streq(unitname, unit_addr))
913 return;
914 }
915
916 snprintf(unit_addr, sizeof(unit_addr), "%x,%x", dev, func);
917 if (streq(unitname, unit_addr))
918 return;
919
920 FAIL(c, dti, node, "PCI unit address format error, expected \"%s\"",
921 unit_addr);
922}
923WARNING(pci_device_reg, check_pci_device_reg, NULL, ®_format, &pci_bridge);
924
925static const struct bus_type simple_bus = {
926 .name = "simple-bus",
927};
928
929static bool node_is_compatible(struct node *node, const char *compat)
930{
931 struct property *prop;
932 const char *str, *end;
933
934 prop = get_property(node, "compatible");
935 if (!prop)
936 return false;
937
938 for (str = prop->val.val, end = str + prop->val.len; str < end;
939 str += strnlen(str, end - str) + 1) {
940 if (streq(str, compat))
941 return true;
942 }
943 return false;
944}
945
946static void check_simple_bus_bridge(struct check *c, struct dt_info *dti, struct node *node)
947{
948 if (node_is_compatible(node, "simple-bus"))
949 node->bus = &simple_bus;
950}
951WARNING(simple_bus_bridge, check_simple_bus_bridge, NULL,
952 &addr_size_cells, &compatible_is_string_list);
953
954static void check_simple_bus_reg(struct check *c, struct dt_info *dti, struct node *node)
955{
956 struct property *prop;
957 const char *unitname = get_unitname(node);
958 char unit_addr[17];
959 unsigned int size;
960 uint64_t reg = 0;
961 cell_t *cells = NULL;
962
963 if (!node->parent || (node->parent->bus != &simple_bus))
964 return;
965
966 prop = get_property(node, "reg");
967 if (prop)
968 cells = (cell_t *)prop->val.val;
969 else {
970 prop = get_property(node, "ranges");
971 if (prop && prop->val.len)
972
973 cells = ((cell_t *)prop->val.val) + node_addr_cells(node);
974 }
975
976 if (!cells) {
977 if (node->parent->parent && !(node->bus == &simple_bus))
978 FAIL(c, dti, node, "missing or empty reg/ranges property");
979 return;
980 }
981
982 size = node_addr_cells(node->parent);
983 while (size--)
984 reg = (reg << 32) | fdt32_to_cpu(*(cells++));
985
986 snprintf(unit_addr, sizeof(unit_addr), "%"PRIx64, reg);
987 if (!streq(unitname, unit_addr))
988 FAIL(c, dti, node, "simple-bus unit address format error, expected \"%s\"",
989 unit_addr);
990}
991WARNING(simple_bus_reg, check_simple_bus_reg, NULL, ®_format, &simple_bus_bridge);
992
993static const struct bus_type i2c_bus = {
994 .name = "i2c-bus",
995};
996
997static void check_i2c_bus_bridge(struct check *c, struct dt_info *dti, struct node *node)
998{
999 if (strprefixeq(node->name, node->basenamelen, "i2c-bus") ||
1000 strprefixeq(node->name, node->basenamelen, "i2c-arb")) {
1001 node->bus = &i2c_bus;
1002 } else if (strprefixeq(node->name, node->basenamelen, "i2c")) {
1003 struct node *child;
1004 for_each_child(node, child) {
1005 if (strprefixeq(child->name, node->basenamelen, "i2c-bus"))
1006 return;
1007 }
1008 node->bus = &i2c_bus;
1009 } else
1010 return;
1011
1012 if (!node->children)
1013 return;
1014
1015 if (node_addr_cells(node) != 1)
1016 FAIL(c, dti, node, "incorrect #address-cells for I2C bus");
1017 if (node_size_cells(node) != 0)
1018 FAIL(c, dti, node, "incorrect #size-cells for I2C bus");
1019
1020}
1021WARNING(i2c_bus_bridge, check_i2c_bus_bridge, NULL, &addr_size_cells);
1022
1023#define I2C_OWN_SLAVE_ADDRESS (1U << 30)
1024#define I2C_TEN_BIT_ADDRESS (1U << 31)
1025
1026static void check_i2c_bus_reg(struct check *c, struct dt_info *dti, struct node *node)
1027{
1028 struct property *prop;
1029 const char *unitname = get_unitname(node);
1030 char unit_addr[17];
1031 uint32_t reg = 0;
1032 int len;
1033 cell_t *cells = NULL;
1034
1035 if (!node->parent || (node->parent->bus != &i2c_bus))
1036 return;
1037
1038 prop = get_property(node, "reg");
1039 if (prop)
1040 cells = (cell_t *)prop->val.val;
1041
1042 if (!cells) {
1043 FAIL(c, dti, node, "missing or empty reg property");
1044 return;
1045 }
1046
1047 reg = fdt32_to_cpu(*cells);
1048
1049 reg &= ~I2C_OWN_SLAVE_ADDRESS;
1050 snprintf(unit_addr, sizeof(unit_addr), "%x", reg);
1051 if (!streq(unitname, unit_addr))
1052 FAIL(c, dti, node, "I2C bus unit address format error, expected \"%s\"",
1053 unit_addr);
1054
1055 for (len = prop->val.len; len > 0; len -= 4) {
1056 reg = fdt32_to_cpu(*(cells++));
1057
1058 reg &= ~I2C_OWN_SLAVE_ADDRESS;
1059
1060 if ((reg & I2C_TEN_BIT_ADDRESS) && ((reg & ~I2C_TEN_BIT_ADDRESS) > 0x3ff))
1061 FAIL_PROP(c, dti, node, prop, "I2C address must be less than 10-bits, got \"0x%x\"",
1062 reg);
1063 else if (reg > 0x7f)
1064 FAIL_PROP(c, dti, node, prop, "I2C address must be less than 7-bits, got \"0x%x\". Set I2C_TEN_BIT_ADDRESS for 10 bit addresses or fix the property",
1065 reg);
1066 }
1067}
1068WARNING(i2c_bus_reg, check_i2c_bus_reg, NULL, ®_format, &i2c_bus_bridge);
1069
1070static const struct bus_type spi_bus = {
1071 .name = "spi-bus",
1072};
1073
1074static void check_spi_bus_bridge(struct check *c, struct dt_info *dti, struct node *node)
1075{
1076 int spi_addr_cells = 1;
1077
1078 if (strprefixeq(node->name, node->basenamelen, "spi")) {
1079 node->bus = &spi_bus;
1080 } else {
1081
1082 struct node *child;
1083
1084 if (node_addr_cells(node) != 1 || node_size_cells(node) != 0)
1085 return;
1086
1087 for_each_child(node, child) {
1088 struct property *prop;
1089 for_each_property(child, prop) {
1090 if (strprefixeq(prop->name, 4, "spi-")) {
1091 node->bus = &spi_bus;
1092 break;
1093 }
1094 }
1095 if (node->bus == &spi_bus)
1096 break;
1097 }
1098
1099 if (node->bus == &spi_bus && get_property(node, "reg"))
1100 FAIL(c, dti, node, "node name for SPI buses should be 'spi'");
1101 }
1102 if (node->bus != &spi_bus || !node->children)
1103 return;
1104
1105 if (get_property(node, "spi-slave"))
1106 spi_addr_cells = 0;
1107 if (node_addr_cells(node) != spi_addr_cells)
1108 FAIL(c, dti, node, "incorrect #address-cells for SPI bus");
1109 if (node_size_cells(node) != 0)
1110 FAIL(c, dti, node, "incorrect #size-cells for SPI bus");
1111
1112}
1113WARNING(spi_bus_bridge, check_spi_bus_bridge, NULL, &addr_size_cells);
1114
1115static void check_spi_bus_reg(struct check *c, struct dt_info *dti, struct node *node)
1116{
1117 struct property *prop;
1118 const char *unitname = get_unitname(node);
1119 char unit_addr[9];
1120 uint32_t reg = 0;
1121 cell_t *cells = NULL;
1122
1123 if (!node->parent || (node->parent->bus != &spi_bus))
1124 return;
1125
1126 if (get_property(node->parent, "spi-slave"))
1127 return;
1128
1129 prop = get_property(node, "reg");
1130 if (prop)
1131 cells = (cell_t *)prop->val.val;
1132
1133 if (!cells) {
1134 FAIL(c, dti, node, "missing or empty reg property");
1135 return;
1136 }
1137
1138 reg = fdt32_to_cpu(*cells);
1139 snprintf(unit_addr, sizeof(unit_addr), "%x", reg);
1140 if (!streq(unitname, unit_addr))
1141 FAIL(c, dti, node, "SPI bus unit address format error, expected \"%s\"",
1142 unit_addr);
1143}
1144WARNING(spi_bus_reg, check_spi_bus_reg, NULL, ®_format, &spi_bus_bridge);
1145
1146static void check_unit_address_format(struct check *c, struct dt_info *dti,
1147 struct node *node)
1148{
1149 const char *unitname = get_unitname(node);
1150
1151 if (node->parent && node->parent->bus)
1152 return;
1153
1154 if (!unitname[0])
1155 return;
1156
1157 if (!strncmp(unitname, "0x", 2)) {
1158 FAIL(c, dti, node, "unit name should not have leading \"0x\"");
1159
1160 unitname += 2;
1161 }
1162 if (unitname[0] == '0' && isxdigit(unitname[1]))
1163 FAIL(c, dti, node, "unit name should not have leading 0s");
1164}
1165WARNING(unit_address_format, check_unit_address_format, NULL,
1166 &node_name_format, &pci_bridge, &simple_bus_bridge);
1167
1168
1169
1170
1171static void check_avoid_default_addr_size(struct check *c, struct dt_info *dti,
1172 struct node *node)
1173{
1174 struct property *reg, *ranges;
1175
1176 if (!node->parent)
1177 return;
1178
1179 reg = get_property(node, "reg");
1180 ranges = get_property(node, "ranges");
1181
1182 if (!reg && !ranges)
1183 return;
1184
1185 if (node->parent->addr_cells == -1)
1186 FAIL(c, dti, node, "Relying on default #address-cells value");
1187
1188 if (node->parent->size_cells == -1)
1189 FAIL(c, dti, node, "Relying on default #size-cells value");
1190}
1191WARNING(avoid_default_addr_size, check_avoid_default_addr_size, NULL,
1192 &addr_size_cells);
1193
1194static void check_avoid_unnecessary_addr_size(struct check *c, struct dt_info *dti,
1195 struct node *node)
1196{
1197 struct property *prop;
1198 struct node *child;
1199 bool has_reg = false;
1200
1201 if (!node->parent || node->addr_cells < 0 || node->size_cells < 0)
1202 return;
1203
1204 if (get_property(node, "ranges") || !node->children)
1205 return;
1206
1207 for_each_child(node, child) {
1208 prop = get_property(child, "reg");
1209 if (prop)
1210 has_reg = true;
1211 }
1212
1213 if (!has_reg)
1214 FAIL(c, dti, node, "unnecessary #address-cells/#size-cells without \"ranges\" or child \"reg\" property");
1215}
1216WARNING(avoid_unnecessary_addr_size, check_avoid_unnecessary_addr_size, NULL, &avoid_default_addr_size);
1217
1218static bool node_is_disabled(struct node *node)
1219{
1220 struct property *prop;
1221
1222 prop = get_property(node, "status");
1223 if (prop) {
1224 char *str = prop->val.val;
1225 if (streq("disabled", str))
1226 return true;
1227 }
1228
1229 return false;
1230}
1231
1232static void check_unique_unit_address_common(struct check *c,
1233 struct dt_info *dti,
1234 struct node *node,
1235 bool disable_check)
1236{
1237 struct node *childa;
1238
1239 if (node->addr_cells < 0 || node->size_cells < 0)
1240 return;
1241
1242 if (!node->children)
1243 return;
1244
1245 for_each_child(node, childa) {
1246 struct node *childb;
1247 const char *addr_a = get_unitname(childa);
1248
1249 if (!strlen(addr_a))
1250 continue;
1251
1252 if (disable_check && node_is_disabled(childa))
1253 continue;
1254
1255 for_each_child(node, childb) {
1256 const char *addr_b = get_unitname(childb);
1257 if (childa == childb)
1258 break;
1259
1260 if (disable_check && node_is_disabled(childb))
1261 continue;
1262
1263 if (streq(addr_a, addr_b))
1264 FAIL(c, dti, childb, "duplicate unit-address (also used in node %s)", childa->fullpath);
1265 }
1266 }
1267}
1268
1269static void check_unique_unit_address(struct check *c, struct dt_info *dti,
1270 struct node *node)
1271{
1272 check_unique_unit_address_common(c, dti, node, false);
1273}
1274WARNING(unique_unit_address, check_unique_unit_address, NULL, &avoid_default_addr_size);
1275
1276static void check_unique_unit_address_if_enabled(struct check *c, struct dt_info *dti,
1277 struct node *node)
1278{
1279 check_unique_unit_address_common(c, dti, node, true);
1280}
1281CHECK_ENTRY(unique_unit_address_if_enabled, check_unique_unit_address_if_enabled,
1282 NULL, false, false, &avoid_default_addr_size);
1283
1284static void check_obsolete_chosen_interrupt_controller(struct check *c,
1285 struct dt_info *dti,
1286 struct node *node)
1287{
1288 struct node *dt = dti->dt;
1289 struct node *chosen;
1290 struct property *prop;
1291
1292 if (node != dt)
1293 return;
1294
1295
1296 chosen = get_node_by_path(dt, "/chosen");
1297 if (!chosen)
1298 return;
1299
1300 prop = get_property(chosen, "interrupt-controller");
1301 if (prop)
1302 FAIL_PROP(c, dti, node, prop,
1303 "/chosen has obsolete \"interrupt-controller\" property");
1304}
1305WARNING(obsolete_chosen_interrupt_controller,
1306 check_obsolete_chosen_interrupt_controller, NULL);
1307
1308static void check_chosen_node_is_root(struct check *c, struct dt_info *dti,
1309 struct node *node)
1310{
1311 if (!streq(node->name, "chosen"))
1312 return;
1313
1314 if (node->parent != dti->dt)
1315 FAIL(c, dti, node, "chosen node must be at root node");
1316}
1317WARNING(chosen_node_is_root, check_chosen_node_is_root, NULL);
1318
1319static void check_chosen_node_bootargs(struct check *c, struct dt_info *dti,
1320 struct node *node)
1321{
1322 struct property *prop;
1323
1324 if (!streq(node->name, "chosen"))
1325 return;
1326
1327 prop = get_property(node, "bootargs");
1328 if (!prop)
1329 return;
1330
1331 c->data = prop->name;
1332 check_is_string(c, dti, node);
1333}
1334WARNING(chosen_node_bootargs, check_chosen_node_bootargs, NULL);
1335
1336static void check_chosen_node_stdout_path(struct check *c, struct dt_info *dti,
1337 struct node *node)
1338{
1339 struct property *prop;
1340
1341 if (!streq(node->name, "chosen"))
1342 return;
1343
1344 prop = get_property(node, "stdout-path");
1345 if (!prop) {
1346 prop = get_property(node, "linux,stdout-path");
1347 if (!prop)
1348 return;
1349 FAIL_PROP(c, dti, node, prop, "Use 'stdout-path' instead");
1350 }
1351
1352 c->data = prop->name;
1353 check_is_string(c, dti, node);
1354}
1355WARNING(chosen_node_stdout_path, check_chosen_node_stdout_path, NULL);
1356
1357struct provider {
1358 const char *prop_name;
1359 const char *cell_name;
1360 bool optional;
1361};
1362
1363static void check_property_phandle_args(struct check *c,
1364 struct dt_info *dti,
1365 struct node *node,
1366 struct property *prop,
1367 const struct provider *provider)
1368{
1369 struct node *root = dti->dt;
1370 int cell, cellsize = 0;
1371
1372 if (prop->val.len % sizeof(cell_t)) {
1373 FAIL_PROP(c, dti, node, prop,
1374 "property size (%d) is invalid, expected multiple of %zu",
1375 prop->val.len, sizeof(cell_t));
1376 return;
1377 }
1378
1379 for (cell = 0; cell < prop->val.len / sizeof(cell_t); cell += cellsize + 1) {
1380 struct node *provider_node;
1381 struct property *cellprop;
1382 int phandle;
1383
1384 phandle = propval_cell_n(prop, cell);
1385
1386
1387
1388
1389 if (phandle == 0 || phandle == -1) {
1390
1391 if (dti->dtsflags & DTSF_PLUGIN)
1392 break;
1393
1394 cellsize = 0;
1395 continue;
1396 }
1397
1398
1399 if (prop->val.markers) {
1400 struct marker *m = prop->val.markers;
1401 for_each_marker_of_type(m, REF_PHANDLE) {
1402 if (m->offset == (cell * sizeof(cell_t)))
1403 break;
1404 }
1405 if (!m)
1406 FAIL_PROP(c, dti, node, prop,
1407 "cell %d is not a phandle reference",
1408 cell);
1409 }
1410
1411 provider_node = get_node_by_phandle(root, phandle);
1412 if (!provider_node) {
1413 FAIL_PROP(c, dti, node, prop,
1414 "Could not get phandle node for (cell %d)",
1415 cell);
1416 break;
1417 }
1418
1419 cellprop = get_property(provider_node, provider->cell_name);
1420 if (cellprop) {
1421 cellsize = propval_cell(cellprop);
1422 } else if (provider->optional) {
1423 cellsize = 0;
1424 } else {
1425 FAIL(c, dti, node, "Missing property '%s' in node %s or bad phandle (referred from %s[%d])",
1426 provider->cell_name,
1427 provider_node->fullpath,
1428 prop->name, cell);
1429 break;
1430 }
1431
1432 if (prop->val.len < ((cell + cellsize + 1) * sizeof(cell_t))) {
1433 FAIL_PROP(c, dti, node, prop,
1434 "property size (%d) too small for cell size %d",
1435 prop->val.len, cellsize);
1436 }
1437 }
1438}
1439
1440static void check_provider_cells_property(struct check *c,
1441 struct dt_info *dti,
1442 struct node *node)
1443{
1444 struct provider *provider = c->data;
1445 struct property *prop;
1446
1447 prop = get_property(node, provider->prop_name);
1448 if (!prop)
1449 return;
1450
1451 check_property_phandle_args(c, dti, node, prop, provider);
1452}
1453#define WARNING_PROPERTY_PHANDLE_CELLS(nm, propname, cells_name, ...) \
1454 static struct provider nm##_provider = { (propname), (cells_name), __VA_ARGS__ }; \
1455 WARNING(nm##_property, check_provider_cells_property, &nm##_provider, &phandle_references);
1456
1457WARNING_PROPERTY_PHANDLE_CELLS(clocks, "clocks", "#clock-cells");
1458WARNING_PROPERTY_PHANDLE_CELLS(cooling_device, "cooling-device", "#cooling-cells");
1459WARNING_PROPERTY_PHANDLE_CELLS(dmas, "dmas", "#dma-cells");
1460WARNING_PROPERTY_PHANDLE_CELLS(hwlocks, "hwlocks", "#hwlock-cells");
1461WARNING_PROPERTY_PHANDLE_CELLS(interrupts_extended, "interrupts-extended", "#interrupt-cells");
1462WARNING_PROPERTY_PHANDLE_CELLS(io_channels, "io-channels", "#io-channel-cells");
1463WARNING_PROPERTY_PHANDLE_CELLS(iommus, "iommus", "#iommu-cells");
1464WARNING_PROPERTY_PHANDLE_CELLS(mboxes, "mboxes", "#mbox-cells");
1465WARNING_PROPERTY_PHANDLE_CELLS(msi_parent, "msi-parent", "#msi-cells", true);
1466WARNING_PROPERTY_PHANDLE_CELLS(mux_controls, "mux-controls", "#mux-control-cells");
1467WARNING_PROPERTY_PHANDLE_CELLS(phys, "phys", "#phy-cells");
1468WARNING_PROPERTY_PHANDLE_CELLS(power_domains, "power-domains", "#power-domain-cells");
1469WARNING_PROPERTY_PHANDLE_CELLS(pwms, "pwms", "#pwm-cells");
1470WARNING_PROPERTY_PHANDLE_CELLS(resets, "resets", "#reset-cells");
1471WARNING_PROPERTY_PHANDLE_CELLS(sound_dai, "sound-dai", "#sound-dai-cells");
1472WARNING_PROPERTY_PHANDLE_CELLS(thermal_sensors, "thermal-sensors", "#thermal-sensor-cells");
1473
1474static bool prop_is_gpio(struct property *prop)
1475{
1476 char *str;
1477
1478
1479
1480
1481
1482 if (strstr(prop->name, "nr-gpio"))
1483 return false;
1484
1485 str = strrchr(prop->name, '-');
1486 if (str)
1487 str++;
1488 else
1489 str = prop->name;
1490 if (!(streq(str, "gpios") || streq(str, "gpio")))
1491 return false;
1492
1493 return true;
1494}
1495
1496static void check_gpios_property(struct check *c,
1497 struct dt_info *dti,
1498 struct node *node)
1499{
1500 struct property *prop;
1501
1502
1503 if (get_property(node, "gpio-hog"))
1504 return;
1505
1506 for_each_property(node, prop) {
1507 struct provider provider;
1508
1509 if (!prop_is_gpio(prop))
1510 continue;
1511
1512 provider.prop_name = prop->name;
1513 provider.cell_name = "#gpio-cells";
1514 provider.optional = false;
1515 check_property_phandle_args(c, dti, node, prop, &provider);
1516 }
1517
1518}
1519WARNING(gpios_property, check_gpios_property, NULL, &phandle_references);
1520
1521static void check_deprecated_gpio_property(struct check *c,
1522 struct dt_info *dti,
1523 struct node *node)
1524{
1525 struct property *prop;
1526
1527 for_each_property(node, prop) {
1528 char *str;
1529
1530 if (!prop_is_gpio(prop))
1531 continue;
1532
1533 str = strstr(prop->name, "gpio");
1534 if (!streq(str, "gpio"))
1535 continue;
1536
1537 FAIL_PROP(c, dti, node, prop,
1538 "'[*-]gpio' is deprecated, use '[*-]gpios' instead");
1539 }
1540
1541}
1542CHECK(deprecated_gpio_property, check_deprecated_gpio_property, NULL);
1543
1544static bool node_is_interrupt_provider(struct node *node)
1545{
1546 struct property *prop;
1547
1548 prop = get_property(node, "interrupt-controller");
1549 if (prop)
1550 return true;
1551
1552 prop = get_property(node, "interrupt-map");
1553 if (prop)
1554 return true;
1555
1556 return false;
1557}
1558
1559static void check_interrupt_provider(struct check *c,
1560 struct dt_info *dti,
1561 struct node *node)
1562{
1563 struct property *prop;
1564
1565 if (!node_is_interrupt_provider(node))
1566 return;
1567
1568 prop = get_property(node, "#interrupt-cells");
1569 if (!prop)
1570 FAIL(c, dti, node,
1571 "Missing #interrupt-cells in interrupt provider");
1572
1573 prop = get_property(node, "#address-cells");
1574 if (!prop)
1575 FAIL(c, dti, node,
1576 "Missing #address-cells in interrupt provider");
1577}
1578WARNING(interrupt_provider, check_interrupt_provider, NULL);
1579
1580static void check_interrupts_property(struct check *c,
1581 struct dt_info *dti,
1582 struct node *node)
1583{
1584 struct node *root = dti->dt;
1585 struct node *irq_node = NULL, *parent = node;
1586 struct property *irq_prop, *prop = NULL;
1587 int irq_cells, phandle;
1588
1589 irq_prop = get_property(node, "interrupts");
1590 if (!irq_prop)
1591 return;
1592
1593 if (irq_prop->val.len % sizeof(cell_t))
1594 FAIL_PROP(c, dti, node, irq_prop, "size (%d) is invalid, expected multiple of %zu",
1595 irq_prop->val.len, sizeof(cell_t));
1596
1597 while (parent && !prop) {
1598 if (parent != node && node_is_interrupt_provider(parent)) {
1599 irq_node = parent;
1600 break;
1601 }
1602
1603 prop = get_property(parent, "interrupt-parent");
1604 if (prop) {
1605 phandle = propval_cell(prop);
1606 if ((phandle == 0) || (phandle == -1)) {
1607
1608
1609 if (dti->dtsflags & DTSF_PLUGIN)
1610 return;
1611 FAIL_PROP(c, dti, parent, prop, "Invalid phandle");
1612 continue;
1613 }
1614
1615 irq_node = get_node_by_phandle(root, phandle);
1616 if (!irq_node) {
1617 FAIL_PROP(c, dti, parent, prop, "Bad phandle");
1618 return;
1619 }
1620 if (!node_is_interrupt_provider(irq_node))
1621 FAIL(c, dti, irq_node,
1622 "Missing interrupt-controller or interrupt-map property");
1623
1624 break;
1625 }
1626
1627 parent = parent->parent;
1628 }
1629
1630 if (!irq_node) {
1631 FAIL(c, dti, node, "Missing interrupt-parent");
1632 return;
1633 }
1634
1635 prop = get_property(irq_node, "#interrupt-cells");
1636 if (!prop) {
1637
1638 return;
1639 }
1640
1641 irq_cells = propval_cell(prop);
1642 if (irq_prop->val.len % (irq_cells * sizeof(cell_t))) {
1643 FAIL_PROP(c, dti, node, prop,
1644 "size is (%d), expected multiple of %d",
1645 irq_prop->val.len, (int)(irq_cells * sizeof(cell_t)));
1646 }
1647}
1648WARNING(interrupts_property, check_interrupts_property, &phandle_references);
1649
1650static const struct bus_type graph_port_bus = {
1651 .name = "graph-port",
1652};
1653
1654static const struct bus_type graph_ports_bus = {
1655 .name = "graph-ports",
1656};
1657
1658static void check_graph_nodes(struct check *c, struct dt_info *dti,
1659 struct node *node)
1660{
1661 struct node *child;
1662
1663 for_each_child(node, child) {
1664 if (!(strprefixeq(child->name, child->basenamelen, "endpoint") ||
1665 get_property(child, "remote-endpoint")))
1666 continue;
1667
1668 node->bus = &graph_port_bus;
1669
1670
1671 if (!node->parent->bus &&
1672 (streq(node->parent->name, "ports") || get_property(node, "reg")))
1673 node->parent->bus = &graph_ports_bus;
1674
1675 break;
1676 }
1677
1678}
1679WARNING(graph_nodes, check_graph_nodes, NULL);
1680
1681static void check_graph_child_address(struct check *c, struct dt_info *dti,
1682 struct node *node)
1683{
1684 int cnt = 0;
1685 struct node *child;
1686
1687 if (node->bus != &graph_ports_bus && node->bus != &graph_port_bus)
1688 return;
1689
1690 for_each_child(node, child) {
1691 struct property *prop = get_property(child, "reg");
1692
1693
1694 if (prop && propval_cell(prop) != 0)
1695 return;
1696
1697 cnt++;
1698 }
1699
1700 if (cnt == 1 && node->addr_cells != -1)
1701 FAIL(c, dti, node, "graph node has single child node '%s', #address-cells/#size-cells are not necessary",
1702 node->children->name);
1703}
1704WARNING(graph_child_address, check_graph_child_address, NULL, &graph_nodes);
1705
1706static void check_graph_reg(struct check *c, struct dt_info *dti,
1707 struct node *node)
1708{
1709 char unit_addr[9];
1710 const char *unitname = get_unitname(node);
1711 struct property *prop;
1712
1713 prop = get_property(node, "reg");
1714 if (!prop || !unitname)
1715 return;
1716
1717 if (!(prop->val.val && prop->val.len == sizeof(cell_t))) {
1718 FAIL(c, dti, node, "graph node malformed 'reg' property");
1719 return;
1720 }
1721
1722 snprintf(unit_addr, sizeof(unit_addr), "%x", propval_cell(prop));
1723 if (!streq(unitname, unit_addr))
1724 FAIL(c, dti, node, "graph node unit address error, expected \"%s\"",
1725 unit_addr);
1726
1727 if (node->parent->addr_cells != 1)
1728 FAIL_PROP(c, dti, node, get_property(node, "#address-cells"),
1729 "graph node '#address-cells' is %d, must be 1",
1730 node->parent->addr_cells);
1731 if (node->parent->size_cells != 0)
1732 FAIL_PROP(c, dti, node, get_property(node, "#size-cells"),
1733 "graph node '#size-cells' is %d, must be 0",
1734 node->parent->size_cells);
1735}
1736
1737static void check_graph_port(struct check *c, struct dt_info *dti,
1738 struct node *node)
1739{
1740 if (node->bus != &graph_port_bus)
1741 return;
1742
1743 if (!strprefixeq(node->name, node->basenamelen, "port"))
1744 FAIL(c, dti, node, "graph port node name should be 'port'");
1745
1746 check_graph_reg(c, dti, node);
1747}
1748WARNING(graph_port, check_graph_port, NULL, &graph_nodes);
1749
1750static struct node *get_remote_endpoint(struct check *c, struct dt_info *dti,
1751 struct node *endpoint)
1752{
1753 int phandle;
1754 struct node *node;
1755 struct property *prop;
1756
1757 prop = get_property(endpoint, "remote-endpoint");
1758 if (!prop)
1759 return NULL;
1760
1761 phandle = propval_cell(prop);
1762
1763 if (phandle == 0 || phandle == -1)
1764 return NULL;
1765
1766 node = get_node_by_phandle(dti->dt, phandle);
1767 if (!node)
1768 FAIL_PROP(c, dti, endpoint, prop, "graph phandle is not valid");
1769
1770 return node;
1771}
1772
1773static void check_graph_endpoint(struct check *c, struct dt_info *dti,
1774 struct node *node)
1775{
1776 struct node *remote_node;
1777
1778 if (!node->parent || node->parent->bus != &graph_port_bus)
1779 return;
1780
1781 if (!strprefixeq(node->name, node->basenamelen, "endpoint"))
1782 FAIL(c, dti, node, "graph endpoint node name should be 'endpoint'");
1783
1784 check_graph_reg(c, dti, node);
1785
1786 remote_node = get_remote_endpoint(c, dti, node);
1787 if (!remote_node)
1788 return;
1789
1790 if (get_remote_endpoint(c, dti, remote_node) != node)
1791 FAIL(c, dti, node, "graph connection to node '%s' is not bidirectional",
1792 remote_node->fullpath);
1793}
1794WARNING(graph_endpoint, check_graph_endpoint, NULL, &graph_nodes);
1795
1796static struct check *check_table[] = {
1797 &duplicate_node_names, &duplicate_property_names,
1798 &node_name_chars, &node_name_format, &property_name_chars,
1799 &name_is_string, &name_properties,
1800
1801 &duplicate_label,
1802
1803 &explicit_phandles,
1804 &phandle_references, &path_references,
1805 &omit_unused_nodes,
1806
1807 &address_cells_is_cell, &size_cells_is_cell, &interrupt_cells_is_cell,
1808 &device_type_is_string, &model_is_string, &status_is_string,
1809 &label_is_string,
1810
1811 &compatible_is_string_list, &names_is_string_list,
1812
1813 &property_name_chars_strict,
1814 &node_name_chars_strict,
1815
1816 &addr_size_cells, ®_format, &ranges_format, &dma_ranges_format,
1817
1818 &unit_address_vs_reg,
1819 &unit_address_format,
1820
1821 &pci_bridge,
1822 &pci_device_reg,
1823 &pci_device_bus_num,
1824
1825 &simple_bus_bridge,
1826 &simple_bus_reg,
1827
1828 &i2c_bus_bridge,
1829 &i2c_bus_reg,
1830
1831 &spi_bus_bridge,
1832 &spi_bus_reg,
1833
1834 &avoid_default_addr_size,
1835 &avoid_unnecessary_addr_size,
1836 &unique_unit_address,
1837 &unique_unit_address_if_enabled,
1838 &obsolete_chosen_interrupt_controller,
1839 &chosen_node_is_root, &chosen_node_bootargs, &chosen_node_stdout_path,
1840
1841 &clocks_property,
1842 &cooling_device_property,
1843 &dmas_property,
1844 &hwlocks_property,
1845 &interrupts_extended_property,
1846 &io_channels_property,
1847 &iommus_property,
1848 &mboxes_property,
1849 &msi_parent_property,
1850 &mux_controls_property,
1851 &phys_property,
1852 &power_domains_property,
1853 &pwms_property,
1854 &resets_property,
1855 &sound_dai_property,
1856 &thermal_sensors_property,
1857
1858 &deprecated_gpio_property,
1859 &gpios_property,
1860 &interrupts_property,
1861 &interrupt_provider,
1862
1863 &alias_paths,
1864
1865 &graph_nodes, &graph_child_address, &graph_port, &graph_endpoint,
1866
1867 &always_fail,
1868};
1869
1870static void enable_warning_error(struct check *c, bool warn, bool error)
1871{
1872 int i;
1873
1874
1875 if ((warn && !c->warn) || (error && !c->error))
1876 for (i = 0; i < c->num_prereqs; i++)
1877 enable_warning_error(c->prereq[i], warn, error);
1878
1879 c->warn = c->warn || warn;
1880 c->error = c->error || error;
1881}
1882
1883static void disable_warning_error(struct check *c, bool warn, bool error)
1884{
1885 int i;
1886
1887
1888
1889 if ((warn && c->warn) || (error && c->error)) {
1890 for (i = 0; i < ARRAY_SIZE(check_table); i++) {
1891 struct check *cc = check_table[i];
1892 int j;
1893
1894 for (j = 0; j < cc->num_prereqs; j++)
1895 if (cc->prereq[j] == c)
1896 disable_warning_error(cc, warn, error);
1897 }
1898 }
1899
1900 c->warn = c->warn && !warn;
1901 c->error = c->error && !error;
1902}
1903
1904void parse_checks_option(bool warn, bool error, const char *arg)
1905{
1906 int i;
1907 const char *name = arg;
1908 bool enable = true;
1909
1910 if ((strncmp(arg, "no-", 3) == 0)
1911 || (strncmp(arg, "no_", 3) == 0)) {
1912 name = arg + 3;
1913 enable = false;
1914 }
1915
1916 for (i = 0; i < ARRAY_SIZE(check_table); i++) {
1917 struct check *c = check_table[i];
1918
1919 if (streq(c->name, name)) {
1920 if (enable)
1921 enable_warning_error(c, warn, error);
1922 else
1923 disable_warning_error(c, warn, error);
1924 return;
1925 }
1926 }
1927
1928 die("Unrecognized check name \"%s\"\n", name);
1929}
1930
1931void process_checks(bool force, struct dt_info *dti)
1932{
1933 int i;
1934 int error = 0;
1935
1936 for (i = 0; i < ARRAY_SIZE(check_table); i++) {
1937 struct check *c = check_table[i];
1938
1939 if (c->warn || c->error)
1940 error = error || run_check(c, dti);
1941 }
1942
1943 if (error) {
1944 if (!force) {
1945 fprintf(stderr, "ERROR: Input tree has errors, aborting "
1946 "(use -f to force output)\n");
1947 exit(2);
1948 } else if (quiet < 3) {
1949 fprintf(stderr, "Warning: Input tree has errors, "
1950 "output forced\n");
1951 }
1952 }
1953}
1954
