summaryrefslogtreecommitdiff
path: root/scripts/dtc/checks.c
blob: 4b3c486f1399f809c0ccc250cf1419120628e822 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation.  2007.
 */

#include "dtc.h"
#include "srcpos.h"

#ifdef TRACE_CHECKS
#define TRACE(c, ...) \
	do { \
		fprintf(stderr, "=== %s: ", (c)->name); \
		fprintf(stderr, __VA_ARGS__); \
		fprintf(stderr, "\n"); \
	} while (0)
#else
#define TRACE(c, fmt, ...)	do { } while (0)
#endif

enum checkstatus {
	UNCHECKED = 0,
	PREREQ,
	PASSED,
	FAILED,
};

struct check;

typedef void (*check_fn)(struct check *c, struct dt_info *dti, struct node *node);

struct check {
	const char *name;
	check_fn fn;
	void *data;
	bool warn, error;
	enum checkstatus status;
	bool inprogress;
	int num_prereqs;
	struct check **prereq;
};

#define CHECK_ENTRY(nm_, fn_, d_, w_, e_, ...)	       \
	static struct check *nm_##_prereqs[] = { __VA_ARGS__ }; \
	static struct check nm_ = { \
		.name = #nm_, \
		.fn = (fn_), \
		.data = (d_), \
		.warn = (w_), \
		.error = (e_), \
		.status = UNCHECKED, \
		.num_prereqs = ARRAY_SIZE(nm_##_prereqs), \
		.prereq = nm_##_prereqs, \
	};
#define WARNING(nm_, fn_, d_, ...) \
	CHECK_ENTRY(nm_, fn_, d_, true, false, __VA_ARGS__)
#define ERROR(nm_, fn_, d_, ...) \
	CHECK_ENTRY(nm_, fn_, d_, false, true, __VA_ARGS__)
#define CHECK(nm_, fn_, d_, ...) \
	CHECK_ENTRY(nm_, fn_, d_, false, false, __VA_ARGS__)

static inline void  PRINTF(5, 6) check_msg(struct check *c, struct dt_info *dti,
					   struct node *node,
					   struct property *prop,
					   const char *fmt, ...)
{
	va_list ap;
	char *str = NULL;
	struct srcpos *pos = NULL;
	char *file_str;

	if (!(c->warn && (quiet < 1)) && !(c->error && (quiet < 2)))
		return;

	if (prop && prop->srcpos)
		pos = prop->srcpos;
	else if (node && node->srcpos)
		pos = node->srcpos;

	if (pos) {
		file_str = srcpos_string(pos);
		xasprintf(&str, "%s", file_str);
		free(file_str);
	} else if (streq(dti->outname, "-")) {
		xasprintf(&str, "<stdout>");
	} else {
		xasprintf(&str, "%s", dti->outname);
	}

	xasprintf_append(&str, ": %s (%s): ",
			(c->error) ? "ERROR" : "Warning", c->name);

	if (node) {
		if (prop)
			xasprintf_append(&str, "%s:%s: ", node->fullpath, prop->name);
		else
			xasprintf_append(&str, "%s: ", node->fullpath);
	}

	va_start(ap, fmt);
	xavsprintf_append(&str, fmt, ap);
	va_end(ap);

	xasprintf_append(&str, "\n");

	if (!prop && pos) {
		pos = node->srcpos;
		while (pos->next) {
			pos = pos->next;

			file_str = srcpos_string(pos);
			xasprintf_append(&str, "  also defined at %s\n", file_str);
			free(file_str);
		}
	}

	fputs(str, stderr);
}

#define FAIL(c, dti, node, ...)						\
	do {								\
		TRACE((c), "\t\tFAILED at %s:%d", __FILE__, __LINE__);	\
		(c)->status = FAILED;					\
		check_msg((c), dti, node, NULL, __VA_ARGS__);		\
	} while (0)

#define FAIL_PROP(c, dti, node, prop, ...)				\
	do {								\
		TRACE((c), "\t\tFAILED at %s:%d", __FILE__, __LINE__);	\
		(c)->status = FAILED;					\
		check_msg((c), dti, node, prop, __VA_ARGS__);		\
	} while (0)


static void check_nodes_props(struct check *c, struct dt_info *dti, struct node *node)
{
	struct node *child;

	TRACE(c, "%s", node->fullpath);
	if (c->fn)
		c->fn(c, dti, node);

	for_each_child(node, child)
		check_nodes_props(c, dti, child);
}

static bool run_check(struct check *c, struct dt_info *dti)
{
	struct node *dt = dti->dt;
	bool error = false;
	int i;

	assert(!c->inprogress);

	if (c->status != UNCHECKED)
		goto out;

	c->inprogress = true;

	for (i = 0; i < c->num_prereqs; i++) {
		struct check *prq = c->prereq[i];
		error = error || run_check(prq, dti);
		if (prq->status != PASSED) {
			c->status = PREREQ;
			check_msg(c, dti, NULL, NULL, "Failed prerequisite '%s'",
				  c->prereq[i]->name);
		}
	}

	if (c->status != UNCHECKED)
		goto out;

	check_nodes_props(c, dti, dt);

	if (c->status == UNCHECKED)
		c->status = PASSED;

	TRACE(c, "\tCompleted, status %d", c->status);

out:
	c->inprogress = false;
	if ((c->status != PASSED) && (c->error))
		error = true;
	return error;
}

/*
 * Utility check functions
 */

/* A check which always fails, for testing purposes only */
static inline void check_always_fail(struct check *c, struct dt_info *dti,
				     struct node *node)
{
	FAIL(c, dti, node, "always_fail check");
}
CHECK(always_fail, check_always_fail, NULL);

static void check_is_string(struct check *c, struct dt_info *dti,
			    struct node *node)
{
	struct property *prop;
	char *propname = c->data;

	prop = get_property(node, propname);
	if (!prop)
		return; /* Not present, assumed ok */

	if (!data_is_one_string(prop->val))
		FAIL_PROP(c, dti, node, prop, "property is not a string");
}
#define WARNING_IF_NOT_STRING(nm, propname) \
	WARNING(nm, check_is_string, (propname))
#define ERROR_IF_NOT_STRING(nm, propname) \
	ERROR(nm, check_is_string, (propname))

static void check_is_string_list(struct check *c, struct dt_info *dti,
				 struct node *node)
{
	int rem, l;
	struct property *prop;
	char *propname = c->data;
	char *str;

	prop = get_property(node, propname);
	if (!prop)
		return; /* Not present, assumed ok */

	str = prop->val.val;
	rem = prop->val.len;
	while (rem > 0) {
		l = strnlen(str, rem);
		if (l == rem) {
			FAIL_PROP(c, dti, node, prop, "property is not a string list");
			break;
		}
		rem -= l + 1;
		str += l + 1;
	}
}
#define WARNING_IF_NOT_STRING_LIST(nm, propname) \
	WARNING(nm, check_is_string_list, (propname))
#define ERROR_IF_NOT_STRING_LIST(nm, propname) \
	ERROR(nm, check_is_string_list, (propname))

static void check_is_cell(struct check *c, struct dt_info *dti,
			  struct node *node)
{
	struct property *prop;
	char *propname = c->data;

	prop = get_property(node, propname);
	if (!prop)
		return; /* Not present, assumed ok */

	if (prop->val.len != sizeof(cell_t))
		FAIL_PROP(c, dti, node, prop, "property is not a single cell");
}
#define WARNING_IF_NOT_CELL(nm, propname) \
	WARNING(nm, check_is_cell, (propname))
#define ERROR_IF_NOT_CELL(nm, propname) \
	ERROR(nm, check_is_cell, (propname))

/*
 * Structural check functions
 */

static void check_duplicate_node_names(struct check *c, struct dt_info *dti,
				       struct node *node)
{
	struct node *child, *child2;

	for_each_child(node, child)
		for (child2 = child->next_sibling;
		     child2;
		     child2 = child2->next_sibling)
			if (streq(child->name, child2->name))
				FAIL(c, dti, child2, "Duplicate node name");
}
ERROR(duplicate_node_names, check_duplicate_node_names, NULL);

static void check_duplicate_property_names(struct check *c, struct dt_info *dti,
					   struct node *node)
{
	struct property *prop, *prop2;

	for_each_property(node, prop) {
		for (prop2 = prop->next; prop2; prop2 = prop2->next) {
			if (prop2->deleted)
				continue;
			if (streq(prop->name, prop2->name))
				FAIL_PROP(c, dti, node, prop, "Duplicate property name");
		}
	}
}
ERROR(duplicate_property_names, check_duplicate_property_names, NULL);

#define LOWERCASE	"abcdefghijklmnopqrstuvwxyz"
#define UPPERCASE	"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
#define DIGITS		"0123456789"
#define PROPNODECHARS	LOWERCASE UPPERCASE DIGITS ",._+*#?-"
#define PROPNODECHARSSTRICT	LOWERCASE UPPERCASE DIGITS ",-"

static void check_node_name_chars(struct check *c, struct dt_info *dti,
				  struct node *node)
{
	int n = strspn(node->name, c->data);

	if (n < strlen(node->name))
		FAIL(c, dti, node, "Bad character '%c' in node name",
		     node->name[n]);
}
ERROR(node_name_chars, check_node_name_chars, PROPNODECHARS "@");

static void check_node_name_chars_strict(struct check *c, struct dt_info *dti,
					 struct node *node)
{
	int n = strspn(node->name, c->data);

	if (n < node->basenamelen)
		FAIL(c, dti, node, "Character '%c' not recommended in node name",
		     node->name[n]);
}
CHECK(node_name_chars_strict, check_node_name_chars_strict, PROPNODECHARSSTRICT);

static void check_node_name_format(struct check *c, struct dt_info *dti,
				   struct node *node)
{
	if (strchr(get_unitname(node), '@'))
		FAIL(c, dti, node, "multiple '@' characters in node name");
}
ERROR(node_name_format, check_node_name_format, NULL, &node_name_chars);

static void check_unit_address_vs_reg(struct check *c, struct dt_info *dti,
				      struct node *node)
{
	const char *unitname = get_unitname(node);
	struct property *prop = get_property(node, "reg");

	if (get_subnode(node, "__overlay__")) {
		/* HACK: Overlay fragments are a special case */
		return;
	}

	if (!prop) {
		prop = get_property(node, "ranges");
		if (prop && !prop->val.len)
			prop = NULL;
	}

	if (prop) {
		if (!unitname[0])
			FAIL(c, dti, node, "node has a reg or ranges property, but no unit name");
	} else {
		if (unitname[0])
			FAIL(c, dti, node, "node has a unit name, but no reg or ranges property");
	}
}
WARNING(unit_address_vs_reg, check_unit_address_vs_reg, NULL);

static void check_property_name_chars(struct check *c, struct dt_info *dti,
				      struct node *node)
{
	struct property *prop;

	for_each_property(node, prop) {
		int n = strspn(prop->name, c->data);

		if (n < strlen(prop->name))
			FAIL_PROP(c, dti, node, prop, "Bad character '%c' in property name",
				  prop->name[n]);
	}
}
ERROR(property_name_chars, check_property_name_chars, PROPNODECHARS);

static void check_property_name_chars_strict(struct check *c,
					     struct dt_info *dti,
					     struct node *node)
{
	struct property *prop;

	for_each_property(node, prop) {
		const char *name = prop->name;
		int n = strspn(name, c->data);

		if (n == strlen(prop->name))
			continue;

		/* Certain names are whitelisted */
		if (streq(name, "device_type"))
			continue;

		/*
		 * # is only allowed at the beginning of property names not counting
		 * the vendor prefix.
		 */
		if (name[n] == '#' && ((n == 0) || (name[n-1] == ','))) {
			name += n + 1;
			n = strspn(name, c->data);
		}
		if (n < strlen(name))
			FAIL_PROP(c, dti, node, prop, "Character '%c' not recommended in property name",
				  name[n]);
	}
}
CHECK(property_name_chars_strict, check_property_name_chars_strict, PROPNODECHARSSTRICT);

#define DESCLABEL_FMT	"%s%s%s%s%s"
#define DESCLABEL_ARGS(node,prop,mark)		\
	((mark) ? "value of " : ""),		\
	((prop) ? "'" : ""), \
	((prop) ? (prop)->name : ""), \
	((prop) ? "' in " : ""), (node)->fullpath

static void check_duplicate_label(struct check *c, struct dt_info *dti,
				  const char *label, struct node *node,
				  struct property *prop, struct marker *mark)
{
	struct node *dt = dti->dt;
	struct node *othernode = NULL;
	struct property *otherprop = NULL;
	struct marker *othermark = NULL;

	othernode = get_node_by_label(dt, label);

	if (!othernode)
		otherprop = get_property_by_label(dt, label, &othernode);
	if (!othernode)
		othermark = get_marker_label(dt, label, &othernode,
					       &otherprop);

	if (!othernode)
		return;

	if ((othernode != node) || (otherprop != prop) || (othermark != mark))
		FAIL(c, dti, node, "Duplicate label '%s' on " DESCLABEL_FMT
		     " and " DESCLABEL_FMT,
		     label, DESCLABEL_ARGS(node, prop, mark),
		     DESCLABEL_ARGS(othernode, otherprop, othermark));
}

static void check_duplicate_label_node(struct check *c, struct dt_info *dti,
				       struct node *node)
{
	struct label *l;
	struct property *prop;

	for_each_label(node->labels, l)
		check_duplicate_label(c, dti, l->label, node, NULL, NULL);

	for_each_property(node, prop) {
		struct marker *m = prop->val.markers;

		for_each_label(prop->labels, l)
			check_duplicate_label(c, dti, l->label, node, prop, NULL);

		for_each_marker_of_type(m, LABEL)
			check_duplicate_label(c, dti, m->ref, node, prop, m);
	}
}
ERROR(duplicate_label, check_duplicate_label_node, NULL);

static cell_t check_phandle_prop(struct check *c, struct dt_info *dti,
				 struct node *node, const char *propname)
{
	struct node *root = dti->dt;
	struct property *prop;
	struct marker *m;
	cell_t phandle;

	prop = get_property(node, propname);
	if (!prop)
		return 0;

	if (prop->val.len != sizeof(cell_t)) {
		FAIL_PROP(c, dti, node, prop, "bad length (%d) %s property",
			  prop->val.len, prop->name);
		return 0;
	}

	m = prop->val.markers;
	for_each_marker_of_type(m, REF_PHANDLE) {
		assert(m->offset == 0);
		if (node != get_node_by_ref(root, m->ref))
			/* "Set this node's phandle equal to some
			 * other node's phandle".  That's nonsensical
			 * by construction. */ {
			FAIL(c, dti, node, "%s is a reference to another node",
			     prop->name);
		}
		/* But setting this node's phandle equal to its own
		 * phandle is allowed - that means allocate a unique
		 * phandle for this node, even if it's not otherwise
		 * referenced.  The value will be filled in later, so
		 * we treat it as having no phandle data for now. */
		return 0;
	}

	phandle = propval_cell(prop);

	if ((phandle == 0) || (phandle == -1)) {
		FAIL_PROP(c, dti, node, prop, "bad value (0x%x) in %s property",
		     phandle, prop->name);
		return 0;
	}

	return phandle;
}

static void check_explicit_phandles(struct check *c, struct dt_info *dti,
				    struct node *node)
{
	struct node *root = dti->dt;
	struct node *other;
	cell_t phandle, linux_phandle;

	/* Nothing should have assigned phandles yet */
	assert(!node->phandle);

	phandle = check_phandle_prop(c, dti, node, "phandle");

	linux_phandle = check_phandle_prop(c, dti, node, "linux,phandle");

	if (!phandle && !linux_phandle)
		/* No valid phandles; nothing further to check */
		return;

	if (linux_phandle && phandle && (phandle != linux_phandle))
		FAIL(c, dti, node, "mismatching 'phandle' and 'linux,phandle'"
		     " properties");

	if (linux_phandle && !phandle)
		phandle = linux_phandle;

	other = get_node_by_phandle(root, phandle);
	if (other && (other != node)) {
		FAIL(c, dti, node, "duplicated phandle 0x%x (seen before at %s)",
		     phandle, other->fullpath);
		return;
	}

	node->phandle = phandle;
}
ERROR(explicit_phandles, check_explicit_phandles, NULL);

static void check_name_properties(struct check *c, struct dt_info *dti,
				  struct node *node)
{
	struct property **pp, *prop = NULL;

	for (pp = &node->proplist; *pp; pp = &((*pp)->next))
		if (streq((*pp)->name, "name")) {
			prop = *pp;
			break;
		}

	if (!prop)
		return; /* No name property, that's fine */

	if ((prop->val.len != node->basenamelen+1)
	    || (memcmp(prop->val.val, node->name, node->basenamelen) != 0)) {
		FAIL(c, dti, node, "\"name\" property is incorrect (\"%s\" instead"
		     " of base node name)", prop->val.val);
	} else {
		/* The name property is correct, and therefore redundant.
		 * Delete it */
		*pp = prop->next;
		free(prop->name);
		data_free(prop->val);
		free(prop);
	}
}
ERROR_IF_NOT_STRING(name_is_string, "name");
ERROR(name_properties, check_name_properties, NULL, &name_is_string);

/*
 * Reference fixup functions
 */

static void fixup_phandle_references(struct check *c, struct dt_info *dti,
				     struct node *node)
{
	struct node *dt = dti->dt;
	struct property *prop;

	for_each_property(node, prop) {
		struct marker *m = prop->val.markers;
		struct node *refnode;
		cell_t phandle;

		for_each_marker_of_type(m, REF_PHANDLE) {
			assert(m->offset + sizeof(cell_t) <= prop->val.len);

			refnode = get_node_by_ref(dt, m->ref);
			if (! refnode) {
				if (!(dti->dtsflags & DTSF_PLUGIN))
					FAIL(c, dti, node, "Reference to non-existent node or "
							"label \"%s\"\n", m->ref);
				else /* mark the entry as unresolved */
					*((fdt32_t *)(prop->val.val + m->offset)) =
						cpu_to_fdt32(0xffffffff);
				continue;
			}

			phandle = get_node_phandle(dt, refnode);
			*((fdt32_t *)(prop->val.val + m->offset)) = cpu_to_fdt32(phandle);

			reference_node(refnode);
		}
	}
}
ERROR(phandle_references, fixup_phandle_references, NULL,
      &duplicate_node_names, &explicit_phandles);

static void fixup_path_references(struct check *c, struct dt_info *dti,
				  struct node *node)
{
	struct node *dt = dti->dt;
	struct property *prop;

	for_each_property(node, prop) {
		struct marker *m = prop->val.markers;
		struct node *refnode;
		char *path;

		for_each_marker_of_type(m, REF_PATH) {
			assert(m->offset <= prop->val.len);

			refnode = get_node_by_ref(dt, m->ref);
			if (!refnode) {
				FAIL(c, dti, node, "Reference to non-existent node or label \"%s\"\n",
				     m->ref);
				continue;
			}

			path = refnode->fullpath;
			prop->val = data_insert_at_marker(prop->val, m, path,
							  strlen(path) + 1);

			reference_node(refnode);
		}
	}
}
ERROR(path_references, fixup_path_references, NULL, &duplicate_node_names);

static void fixup_omit_unused_nodes(struct check *c, struct dt_info *dti,
				    struct node *node)
{
	if (generate_symbols && node->labels)
		return;
	if (node->omit_if_unused && !node->is_referenced)
		delete_node(node);
}
ERROR(omit_unused_nodes, fixup_omit_unused_nodes, NULL, &phandle_references, &path_references);

/*
 * Semantic checks
 */
WARNING_IF_NOT_CELL(address_cells_is_cell, "#address-cells");
WARNING_IF_NOT_CELL(size_cells_is_cell, "#size-cells");
WARNING_IF_NOT_CELL(interrupt_cells_is_cell, "#interrupt-cells");

WARNING_IF_NOT_STRING(device_type_is_string, "device_type");
WARNING_IF_NOT_STRING(model_is_string, "model");
WARNING_IF_NOT_STRING(status_is_string, "status");
WARNING_IF_NOT_STRING(label_is_string, "label");

WARNING_IF_NOT_STRING_LIST(compatible_is_string_list, "compatible");

static void check_names_is_string_list(struct check *c, struct dt_info *dti,
				       struct node *node)
{
	struct property *prop;

	for_each_property(node, prop) {
		const char *s = strrchr(prop->name, '-');
		if (!s || !streq(s, "-names"))
			continue;

		c->data = prop->name;
		check_is_string_list(c, dti, node);
	}
}
WARNING(names_is_string_list, check_names_is_string_list, NULL);

static void check_alias_paths(struct check *c, struct dt_info *dti,
				    struct node *node)
{
	struct property *prop;

	if (!streq(node->name, "aliases"))
		return;

	for_each_property(node, prop) {
		if (streq(prop->name, "phandle")
		    || streq(prop->name, "linux,phandle")) {
			continue;
		}

		if (!prop->val.val || !get_node_by_path(dti->dt, prop->val.val)) {
			FAIL_PROP(c, dti, node, prop, "aliases property is not a valid node (%s)",
				  prop->val.val);
			continue;
		}
		if (strspn(prop->name, LOWERCASE DIGITS "-") != strlen(prop->name))
			FAIL(c, dti, node, "aliases property name must include only lowercase and '-'");
	}
}
WARNING(alias_paths, check_alias_paths, NULL);

static void fixup_addr_size_cells(struct check *c, struct dt_info *dti,
				  struct node *node)
{
	struct property *prop;

	node->addr_cells = -1;
	node->size_cells = -1;

	prop = get_property(node, "#address-cells");
	if (prop)
		node->addr_cells = propval_cell(prop);

	prop = get_property(node, "#size-cells");
	if (prop)
		node->size_cells = propval_cell(prop);
}
WARNING(addr_size_cells, fixup_addr_size_cells, NULL,
	&address_cells_is_cell, &size_cells_is_cell);

#define node_addr_cells(n) \
	(((n)->addr_cells == -1) ? 2 : (n)->addr_cells)
#define node_size_cells(n) \
	(((n)->size_cells == -1) ? 1 : (n)->size_cells)

static void check_reg_format(struct check *c, struct dt_info *dti,
			     struct node *node)
{
	struct property *prop;
	int addr_cells, size_cells, entrylen;

	prop = get_property(node, "reg");
	if (!prop)
		return; /* No "reg", that's fine */

	if (!node->parent) {
		FAIL(c, dti, node, "Root node has a \"reg\" property");
		return;
	}

	if (prop->val.len == 0)
		FAIL_PROP(c, dti, node, prop, "property is empty");

	addr_cells = node_addr_cells(node->parent);
	size_cells = node_size_cells(node->parent);
	entrylen = (addr_cells + size_cells) * sizeof(cell_t);

	if (!entrylen || (prop->val.len % entrylen) != 0)
		FAIL_PROP(c, dti, node, prop, "property has invalid length (%d bytes) "
			  "(#address-cells == %d, #size-cells == %d)",
			  prop->val.len, addr_cells, size_cells);
}
WARNING(reg_format, check_reg_format, NULL, &addr_size_cells);

static void check_ranges_format(struct check *c, struct dt_info *dti,
				struct node *node)
{
	struct property *prop;
	int c_addr_cells, p_addr_cells, c_size_cells, p_size_cells, entrylen;
	const char *ranges = c->data;

	prop = get_property(node, ranges);
	if (!prop)
		return;

	if (!node->parent) {
		FAIL_PROP(c, dti, node, prop, "Root node has a \"%s\" property",
			  ranges);
		return;
	}

	p_addr_cells = node_addr_cells(node->parent);
	p_size_cells = node_size_cells(node->parent);
	c_addr_cells = node_addr_cells(node);
	c_size_cells = node_size_cells(node);
	entrylen = (p_addr_cells + c_addr_cells + c_size_cells) * sizeof(cell_t);

	if (prop->val.len == 0) {
		if (p_addr_cells != c_addr_cells)
			FAIL_PROP(c, dti, node, prop, "empty \"%s\" property but its "
				  "#address-cells (%d) differs from %s (%d)",
				  ranges, c_addr_cells, node->parent->fullpath,
				  p_addr_cells);
		if (p_size_cells != c_size_cells)
			FAIL_PROP(c, dti, node, prop, "empty \"%s\" property but its "
				  "#size-cells (%d) differs from %s (%d)",
				  ranges, c_size_cells, node->parent->fullpath,
				  p_size_cells);
	} else if ((prop->val.len % entrylen) != 0) {
		FAIL_PROP(c, dti, node, prop, "\"%s\" property has invalid length (%d bytes) "
			  "(parent #address-cells == %d, child #address-cells == %d, "
			  "#size-cells == %d)", ranges, prop->val.len,
			  p_addr_cells, c_addr_cells, c_size_cells);
	}
}
WARNING(ranges_format, check_ranges_format, "ranges", &addr_size_cells);
WARNING(dma_ranges_format, check_ranges_format, "dma-ranges", &addr_size_cells);

static const struct bus_type pci_bus = {
	.name = "PCI",
};

static void check_pci_bridge(struct check *c, struct dt_info *dti, struct node *node)
{
	struct property *prop;
	cell_t *cells;

	prop = get_property(node, "device_type");
	if (!prop || !streq(prop->val.val, "pci"))
		return;

	node->bus = &pci_bus;

	if (!strprefixeq(node->name, node->basenamelen, "pci") &&
	    !strprefixeq(node->name, node->basenamelen, "pcie"))
		FAIL(c, dti, node, "node name is not \"pci\" or \"pcie\"");

	prop = get_property(node, "ranges");
	if (!prop)
		FAIL(c, dti, node, "missing ranges for PCI bridge (or not a bridge)");

	if (node_addr_cells(node) != 3)
		FAIL(c, dti, node, "incorrect #address-cells for PCI bridge");
	if (node_size_cells(node) != 2)
		FAIL(c, dti, node, "incorrect #size-cells for PCI bridge");

	prop = get_property(node, "bus-range");
	if (!prop)
		return;

	if (prop->val.len != (sizeof(cell_t) * 2)) {
		FAIL_PROP(c, dti, node, prop, "value must be 2 cells");
		return;
	}
	cells = (cell_t *)prop->val.val;
	if (fdt32_to_cpu(cells[0]) > fdt32_to_cpu(cells[1]))
		FAIL_PROP(c, dti, node, prop, "1st cell must be less than or equal to 2nd cell");
	if (fdt32_to_cpu(cells[1]) > 0xff)
		FAIL_PROP(c, dti, node, prop, "maximum bus number must be less than 256");
}
WARNING(pci_bridge, check_pci_bridge, NULL,
	&device_type_is_string, &addr_size_cells);

static void check_pci_device_bus_num(struct check *c, struct dt_info *dti, struct node *node)
{
	struct property *prop;
	unsigned int bus_num, min_bus, max_bus;
	cell_t *cells;

	if (!node->parent || (node->parent->bus != &pci_bus))
		return;

	prop = get_property(node, "reg");
	if (!prop)
		return;

	cells = (cell_t *)prop->val.val;
	bus_num = (fdt32_to_cpu(cells[0]) & 0x00ff0000) >> 16;

	prop = get_property(node->parent, "bus-range");
	if (!prop) {
		min_bus = max_bus = 0;
	} else {
		cells = (cell_t *)prop->val.val;
		min_bus = fdt32_to_cpu(cells[0]);
		max_bus = fdt32_to_cpu(cells[0]);
	}
	if ((bus_num < min_bus) || (bus_num > max_bus))
		FAIL_PROP(c, dti, node, prop, "PCI bus number %d out of range, expected (%d - %d)",
			  bus_num, min_bus, max_bus);
}
WARNING(pci_device_bus_num, check_pci_device_bus_num, NULL, &reg_format, &pci_bridge);

static void check_pci_device_reg(struct check *c, struct dt_info *dti, struct node *node)
{
	struct property *prop;
	const char *unitname = get_unitname(node);
	char unit_addr[5];
	unsigned int dev, func, reg;
	cell_t *cells;

	if (!node->parent || (node->parent->bus != &pci_bus))
		return;

	prop = get_property(node, "reg");
	if (!prop) {
		FAIL(c, dti, node, "missing PCI reg property");
		return;
	}

	cells = (cell_t *)prop->val.val;
	if (cells[1] || cells[2])
		FAIL_PROP(c, dti, node, prop, "PCI reg config space address cells 2 and 3 must be 0");

	reg = fdt32_to_cpu(cells[0]);
	dev = (reg & 0xf800) >> 11;
	func = (reg & 0x700) >> 8;

	if (reg & 0xff000000)
		FAIL_PROP(c, dti, node, prop, "PCI reg address is not configuration space");
	if (reg & 0x000000ff)
		FAIL_PROP(c, dti, node, prop, "PCI reg config space address register number must be 0");

	if (func == 0) {
		snprintf(unit_addr, sizeof(unit_addr), "%x", dev);
		if (streq(unitname, unit_addr))
			return;
	}

	snprintf(unit_addr, sizeof(unit_addr), "%x,%x", dev, func);
	if (streq(unitname, unit_addr))
		return;

	FAIL(c, dti, node, "PCI unit address format error, expected \"%s\"",
	     unit_addr);
}
WARNING(pci_device_reg, check_pci_device_reg, NULL, &reg_format, &pci_bridge);

static const struct bus_type simple_bus = {
	.name = "simple-bus",
};

static bool node_is_compatible(struct node *node, const char *compat)
{
	struct property *prop;
	const char *str, *end;

	prop = get_property(node, "compatible");
	if (!prop)
		return false;

	for (str = prop->val.val, end = str + prop->val.len; str < end;
	     str += strnlen(str, end - str) + 1) {
		if (streq(str, compat))
			return true;
	}
	return false;
}

static void check_simple_bus_bridge(struct check *c, struct dt_info *dti, struct node *node)
{
	if (node_is_compatible(node, "simple-bus"))
		node->bus = &simple_bus;
}
WARNING(simple_bus_bridge, check_simple_bus_bridge, NULL,
	&addr_size_cells, &compatible_is_string_list);

static void check_simple_bus_reg(struct check *c, struct dt_info *dti, struct node *node)
{
	struct property *prop;
	const char *unitname = get_unitname(node);
	char unit_addr[17];
	unsigned int size;
	uint64_t reg = 0;
	cell_t *cells = NULL;

	if (!node->parent || (node->parent->bus != &simple_bus))
		return;

	prop = get_property(node, "reg");
	if (prop)
		cells = (cell_t *)prop->val.val;
	else {
		prop = get_property(node, "ranges");
		if (prop && prop->val.len)
			/* skip of child address */
			cells = ((cell_t *)prop->val.val) + node_addr_cells(node);
	}

	if (!cells) {
		if (node->parent->parent && !(node->bus == &simple_bus))
			FAIL(c, dti, node, "missing or empty reg/ranges property");
		return;
	}

	size = node_addr_cells(node->parent);
	while (size--)
		reg = (reg << 32) | fdt32_to_cpu(*(cells++));

	snprintf(unit_addr, sizeof(unit_addr), "%"PRIx64, reg);
	if (!streq(unitname, unit_addr))
		FAIL(c, dti, node, "simple-bus unit address format error, expected \"%s\"",
		     unit_addr);
}
WARNING(simple_bus_reg, check_simple_bus_reg, NULL, &reg_format, &simple_bus_bridge);

static const struct bus_type i2c_bus = {
	.name = "i2c-bus",
};

static void check_i2c_bus_bridge(struct check *c, struct dt_info *dti, struct node *node)
{
	if (strprefixeq(node->name, node->basenamelen, "i2c-bus") ||
	    strprefixeq(node->name, node->basenamelen, "i2c-arb")) {
		node->bus = &i2c_bus;
	} else if (strprefixeq(node->name, node->basenamelen, "i2c")) {
		struct node *child;
		for_each_child(node, child) {
			if (strprefixeq(child->name, node->basenamelen, "i2c-bus"))
				return;
		}
		node->bus = &i2c_bus;
	} else
		return;

	if (!node->children)
		return;

	if (node_addr_cells(node) != 1)
		FAIL(c, dti, node, "incorrect #address-cells for I2C bus");
	if (node_size_cells(node) != 0)
		FAIL(c, dti, node, "incorrect #size-cells for I2C bus");

}
WARNING(i2c_bus_bridge, check_i2c_bus_bridge, NULL, &addr_size_cells);

static void check_i2c_bus_reg(struct check *c, struct dt_info *dti, struct node *node)
{
	struct property *prop;
	const char *unitname = get_unitname(node);
	char unit_addr[17];
	uint32_t reg = 0;
	int len;
	cell_t *cells = NULL;

	if (!node->parent || (node->parent->bus != &i2c_bus))
		return;

	prop = get_property(node, "reg");
	if (prop)
		cells = (cell_t *)prop->val.val;

	if (!cells) {
		FAIL(c, dti, node, "missing or empty reg property");
		return;
	}

	reg = fdt32_to_cpu(*cells);
	snprintf(unit_addr, sizeof(unit_addr), "%x", reg);
	if (!streq(unitname, unit_addr))
		FAIL(c, dti, node, "I2C bus unit address format error, expected \"%s\"",
		     unit_addr);

	for (len = prop->val.len; len > 0; len -= 4) {
		reg = fdt32_to_cpu(*(cells++));
		if (reg > 0x3ff)
			FAIL_PROP(c, dti, node, prop, "I2C address must be less than 10-bits, got \"0x%x\"",
				  reg);

	}
}
WARNING(i2c_bus_reg, check_i2c_bus_reg, NULL, &reg_format, &i2c_bus_bridge);

static const struct bus_type spi_bus = {
	.name = "spi-bus",
};

static void check_spi_bus_bridge(struct check *c, struct dt_info *dti, struct node *node)
{
	int spi_addr_cells = 1;

	if (strprefixeq(node->name, node->basenamelen, "spi")) {
		node->bus = &spi_bus;
	} else {
		/* Try to detect SPI buses which don't have proper node name */
		struct node *child;

		if (node_addr_cells(node) != 1 || node_size_cells(node) != 0)
			return;

		for_each_child(node, child) {
			struct property *prop;
			for_each_property(child, prop) {
				if (strprefixeq(prop->name, 4, "spi-")) {
					node->bus = &spi_bus;
					break;
				}
			}
			if (node->bus == &spi_bus)
				break;
		}

		if (node->bus == &spi_bus && get_property(node, "reg"))
			FAIL(c, dti, node, "node name for SPI buses should be 'spi'");
	}
	if (node->bus != &spi_bus || !node->children)
		return;

	if (get_property(node, "spi-slave"))
		spi_addr_cells = 0;
	if (node_addr_cells(node) != spi_addr_cells)
		FAIL(c, dti, node, "incorrect #address-cells for SPI bus");
	if (node_size_cells(node) != 0)
		FAIL(c, dti, node, "incorrect #size-cells for SPI bus");

}
WARNING(spi_bus_bridge, check_spi_bus_bridge, NULL, &addr_size_cells);

static void check_spi_bus_reg(struct check *c, struct dt_info *dti, struct node *node)
{
	struct property *prop;
	const char *unitname = get_unitname(node);
	char unit_addr[9];
	uint32_t reg = 0;
	cell_t *cells = NULL;

	if (!node->parent || (node->parent->bus != &spi_bus))
		return;

	if (get_property(node->parent, "spi-slave"))
		return;

	prop = get_property(node, "reg");
	if (prop)
		cells = (cell_t *)prop->val.val;

	if (!cells) {
		FAIL(c, dti, node, "missing or empty reg property");
		return;
	}

	reg = fdt32_to_cpu(*cells);
	snprintf(unit_addr, sizeof(unit_addr), "%x", reg);
	if (!streq(unitname, unit_addr))
		FAIL(c, dti, node, "SPI bus unit address format error, expected \"%s\"",
		     unit_addr);
}
WARNING(spi_bus_reg, check_spi_bus_reg, NULL, &reg_format, &spi_bus_bridge);

static void check_unit_address_format(struct check *c, struct dt_info *dti,
				      struct node *node)
{
	const char *unitname = get_unitname(node);

	if (node->parent && node->parent->bus)
		return;

	if (!unitname[0])
		return;

	if (!strncmp(unitname, "0x", 2)) {
		FAIL(c, dti, node, "unit name should not have leading \"0x\"");
		/* skip over 0x for next test */
		unitname += 2;
	}
	if (unitname[0] == '0' && isxdigit(unitname[1]))
		FAIL(c, dti, node, "unit name should not have leading 0s");
}
WARNING(unit_address_format, check_unit_address_format, NULL,
	&node_name_format, &pci_bridge, &simple_bus_bridge);

/*
 * Style checks
 */
static void check_avoid_default_addr_size(struct check *c, struct dt_info *dti,
					  struct node *node)
{
	struct property *reg, *ranges;

	if (!node->parent)
		return; /* Ignore root node */

	reg = get_property(node, "reg");
	ranges = get_property(node, "ranges");

	if (!reg && !ranges)
		return;

	if (node->parent->addr_cells == -1)
		FAIL(c, dti, node, "Relying on default #address-cells value");

	if (node->parent->size_cells == -1)
		FAIL(c, dti, node, "Relying on default #size-cells value");
}
WARNING(avoid_default_addr_size, check_avoid_default_addr_size, NULL,
	&addr_size_cells);

static void check_avoid_unnecessary_addr_size(struct check *c, struct dt_info *dti,
					      struct node *node)
{
	struct property *prop;
	struct node *child;
	bool has_reg = false;

	if (!node->parent || node->addr_cells < 0 || node->size_cells < 0)
		return;

	if (get_property(node, "ranges") || !node->children)
		return;

	for_each_child(node, child) {
		prop = get_property(child, "reg");
		if (prop)
			has_reg = true;
	}

	if (!has_reg)
		FAIL(c, dti, node, "unnecessary #address-cells/#size-cells without \"ranges\" or child \"reg\" property");
}
WARNING(avoid_unnecessary_addr_size, check_avoid_unnecessary_addr_size, NULL, &avoid_default_addr_size);

static bool node_is_disabled(struct node *node)
{
	struct property *prop;

	prop = get_property(node, "status");
	if (prop) {
		char *str = prop->val.val;
		if (streq("disabled", str))
			return true;
	}

	return false;
}

static void check_unique_unit_address_common(struct check *c,
						struct dt_info *dti,
						struct node *node,
						bool disable_check)
{
	struct node *childa;

	if (node->addr_cells < 0 || node->size_cells < 0)
		return;

	if (!node->children)
		return;

	for_each_child(node, childa) {
		struct node *childb;
		const char *addr_a = get_unitname(childa);

		if (!strlen(addr_a))
			continue;

		if (disable_check && node_is_disabled(childa))
			continue;

		for_each_child(node, childb) {
			const char *addr_b = get_unitname(childb);
			if (childa == childb)
				break;

			if (disable_check && node_is_disabled(childb))
				continue;

			if (streq(addr_a, addr_b))
				FAIL(c, dti, childb, "duplicate unit-address (also used in node %s)", childa->fullpath);
		}
	}
}

static void check_unique_unit_address(struct check *c, struct dt_info *dti,
					      struct node *node)
{
	check_unique_unit_address_common(c, dti, node, false);
}
WARNING(unique_unit_address, check_unique_unit_address, NULL, &avoid_default_addr_size);

static void check_unique_unit_address_if_enabled(struct check *c, struct dt_info *dti,
					      struct node *node)
{
	check_unique_unit_address_common(c, dti, node, true);
}
CHECK_ENTRY(unique_unit_address_if_enabled, check_unique_unit_address_if_enabled,
	    NULL, false, false, &avoid_default_addr_size);

static void check_obsolete_chosen_interrupt_controller(struct check *c,
						       struct dt_info *dti,
						       struct node *node)
{
	struct node *dt = dti->dt;
	struct node *chosen;
	struct property *prop;

	if (node != dt)
		return;


	chosen = get_node_by_path(dt, "/chosen");
	if (!chosen)
		return;

	prop = get_property(chosen, "interrupt-controller");
	if (prop)
		FAIL_PROP(c, dti, node, prop,
			  "/chosen has obsolete \"interrupt-controller\" property");
}
WARNING(obsolete_chosen_interrupt_controller,
	check_obsolete_chosen_interrupt_controller, NULL);

static void check_chosen_node_is_root(struct check *c, struct dt_info *dti,
				      struct node *node)
{
	if (!streq(node->name, "chosen"))
		return;

	if (node->parent != dti->dt)
		FAIL(c, dti, node, "chosen node must be at root node");
}
WARNING(chosen_node_is_root, check_chosen_node_is_root, NULL);

static void check_chosen_node_bootargs(struct check *c, struct dt_info *dti,
				       struct node *node)
{
	struct property *prop;

	if (!streq(node->name, "chosen"))
		return;

	prop = get_property(node, "bootargs");
	if (!prop)
		return;

	c->data = prop->name;
	check_is_string(c, dti, node);
}
WARNING(chosen_node_bootargs, check_chosen_node_bootargs, NULL);

static void check_chosen_node_stdout_path(struct check *c, struct dt_info *dti,
					  struct node *node)
{
	struct property *prop;

	if (!streq(node->name, "chosen"))
		return;

	prop = get_property(node, "stdout-path");
	if (!prop) {
		prop = get_property(node, "linux,stdout-path");
		if (!prop)
			return;
		FAIL_PROP(c, dti, node, prop, "Use 'stdout-path' instead");
	}

	c->data = prop->name;
	check_is_string(c, dti, node);
}
WARNING(chosen_node_stdout_path, check_chosen_node_stdout_path, NULL);

struct provider {
	const char *prop_name;
	const char *cell_name;
	bool optional;
};

static void check_property_phandle_args(struct check *c,
					  struct dt_info *dti,
				          struct node *node,
				          struct property *prop,
				          const struct provider *provider)
{
	struct node *root = dti->dt;
	int cell, cellsize = 0;

	if (prop->val.len % sizeof(cell_t)) {
		FAIL_PROP(c, dti, node, prop,
			  "property size (%d) is invalid, expected multiple of %zu",
			  prop->val.len, sizeof(cell_t));
		return;
	}

	for (cell = 0; cell < prop->val.len / sizeof(cell_t); cell += cellsize + 1) {
		struct node *provider_node;
		struct property *cellprop;
		int phandle;

		phandle = propval_cell_n(prop, cell);
		/*
		 * Some bindings use a cell value 0 or -1 to skip over optional
		 * entries when each index position has a specific definition.
		 */
		if (phandle == 0 || phandle == -1) {
			/* Give up if this is an overlay with external references */
			if (dti->dtsflags & DTSF_PLUGIN)
				break;

			cellsize = 0;
			continue;
		}

		/* If we have markers, verify the current cell is a phandle */
		if (prop->val.markers) {
			struct marker *m = prop->val.markers;
			for_each_marker_of_type(m, REF_PHANDLE) {
				if (m->offset == (cell * sizeof(cell_t)))
					break;
			}
			if (!m)
				FAIL_PROP(c, dti, node, prop,
					  "cell %d is not a phandle reference",
					  cell);
		}

		provider_node = get_node_by_phandle(root, phandle);
		if (!provider_node) {
			FAIL_PROP(c, dti, node, prop,
				  "Could not get phandle node for (cell %d)",
				  cell);
			break;
		}

		cellprop = get_property(provider_node, provider->cell_name);
		if (cellprop) {
			cellsize = propval_cell(cellprop);
		} else if (provider->optional) {
			cellsize = 0;
		} else {
			FAIL(c, dti, node, "Missing property '%s' in node %s or bad phandle (referred from %s[%d])",
			     provider->cell_name,
			     provider_node->fullpath,
			     prop->name, cell);
			break;
		}

		if (prop->val.len < ((cell + cellsize + 1) * sizeof(cell_t))) {
			FAIL_PROP(c, dti, node, prop,
				  "property size (%d) too small for cell size %d",
				  prop->val.len, cellsize);
		}
	}
}

static void check_provider_cells_property(struct check *c,
					  struct dt_info *dti,
				          struct node *node)
{
	struct provider *provider = c->data;
	struct property *prop;

	prop = get_property(node, provider->prop_name);
	if (!prop)
		return;

	check_property_phandle_args(c, dti, node, prop, provider);
}
#define WARNING_PROPERTY_PHANDLE_CELLS(nm, propname, cells_name, ...) \
	static struct provider nm##_provider = { (propname), (cells_name), __VA_ARGS__ }; \
	WARNING(nm##_property, check_provider_cells_property, &nm##_provider, &phandle_references);

WARNING_PROPERTY_PHANDLE_CELLS(clocks, "clocks", "#clock-cells");
WARNING_PROPERTY_PHANDLE_CELLS(cooling_device, "cooling-device", "#cooling-cells");
WARNING_PROPERTY_PHANDLE_CELLS(dmas, "dmas", "#dma-cells");
WARNING_PROPERTY_PHANDLE_CELLS(hwlocks, "hwlocks", "#hwlock-cells");
WARNING_PROPERTY_PHANDLE_CELLS(interrupts_extended, "interrupts-extended", "#interrupt-cells");
WARNING_PROPERTY_PHANDLE_CELLS(io_channels, "io-channels", "#io-channel-cells");
WARNING_PROPERTY_PHANDLE_CELLS(iommus, "iommus", "#iommu-cells");
WARNING_PROPERTY_PHANDLE_CELLS(mboxes, "mboxes", "#mbox-cells");
WARNING_PROPERTY_PHANDLE_CELLS(msi_parent, "msi-parent", "#msi-cells", true);
WARNING_PROPERTY_PHANDLE_CELLS(mux_controls, "mux-controls", "#mux-control-cells");
WARNING_PROPERTY_PHANDLE_CELLS(phys, "phys", "#phy-cells");
WARNING_PROPERTY_PHANDLE_CELLS(power_domains, "power-domains", "#power-domain-cells");
WARNING_PROPERTY_PHANDLE_CELLS(pwms, "pwms", "#pwm-cells");
WARNING_PROPERTY_PHANDLE_CELLS(resets, "resets", "#reset-cells");
WARNING_PROPERTY_PHANDLE_CELLS(sound_dai, "sound-dai", "#sound-dai-cells");
WARNING_PROPERTY_PHANDLE_CELLS(thermal_sensors, "thermal-sensors", "#thermal-sensor-cells");

static bool prop_is_gpio(struct property *prop)
{
	char *str;

	/*
	 * *-gpios and *-gpio can appear in property names,
	 * so skip over any false matches (only one known ATM)
	 */
	if (strstr(prop->name, "nr-gpio"))
		return false;

	str = strrchr(prop->name, '-');
	if (str)
		str++;
	else
		str = prop->name;
	if (!(streq(str, "gpios") || streq(str, "gpio")))
		return false;

	return true;
}

static void check_gpios_property(struct check *c,
					  struct dt_info *dti,
				          struct node *node)
{
	struct property *prop;

	/* Skip GPIO hog nodes which have 'gpios' property */
	if (get_property(node, "gpio-hog"))
		return;

	for_each_property(node, prop) {
		struct provider provider;

		if (!prop_is_gpio(prop))
			continue;

		provider.prop_name = prop->name;
		provider.cell_name = "#gpio-cells";
		provider.optional = false;
		check_property_phandle_args(c, dti, node, prop, &provider);
	}

}
WARNING(gpios_property, check_gpios_property, NULL, &phandle_references);

static void check_deprecated_gpio_property(struct check *c,
					   struct dt_info *dti,
				           struct node *node)
{
	struct property *prop;

	for_each_property(node, prop) {
		char *str;

		if (!prop_is_gpio(prop))
			continue;

		str = strstr(prop->name, "gpio");
		if (!streq(str, "gpio"))
			continue;

		FAIL_PROP(c, dti, node, prop,
			  "'[*-]gpio' is deprecated, use '[*-]gpios' instead");
	}

}
CHECK(deprecated_gpio_property, check_deprecated_gpio_property, NULL);

static bool node_is_interrupt_provider(struct node *node)
{
	struct property *prop;

	prop = get_property(node, "interrupt-controller");
	if (prop)
		return true;

	prop = get_property(node, "interrupt-map");
	if (prop)
		return true;

	return false;
}
static void check_interrupts_property(struct check *c,
				      struct dt_info *dti,
				      struct node *node)
{
	struct node *root = dti->dt;
	struct node *irq_node = NULL, *parent = node;
	struct property *irq_prop, *prop = NULL;
	int irq_cells, phandle;

	irq_prop = get_property(node, "interrupts");
	if (!irq_prop)
		return;

	if (irq_prop->val.len % sizeof(cell_t))
		FAIL_PROP(c, dti, node, irq_prop, "size (%d) is invalid, expected multiple of %zu",
		     irq_prop->val.len, sizeof(cell_t));

	while (parent && !prop) {
		if (parent != node && node_is_interrupt_provider(parent)) {
			irq_node = parent;
			break;
		}

		prop = get_property(parent, "interrupt-parent");
		if (prop) {
			phandle = propval_cell(prop);
			if ((phandle == 0) || (phandle == -1)) {
				/* Give up if this is an overlay with
				 * external references */
				if (dti->dtsflags & DTSF_PLUGIN)
					return;
				FAIL_PROP(c, dti, parent, prop, "Invalid phandle");
				continue;
			}

			irq_node = get_node_by_phandle(root, phandle);
			if (!irq_node) {
				FAIL_PROP(c, dti, parent, prop, "Bad phandle");
				return;
			}
			if (!node_is_interrupt_provider(irq_node))
				FAIL(c, dti, irq_node,
				     "Missing interrupt-controller or interrupt-map property");

			break;
		}

		parent = parent->parent;
	}

	if (!irq_node) {
		FAIL(c, dti, node, "Missing interrupt-parent");
		return;
	}

	prop = get_property(irq_node, "#interrupt-cells");
	if (!prop) {
		FAIL(c, dti, irq_node, "Missing #interrupt-cells in interrupt-parent");
		return;
	}

	irq_cells = propval_cell(prop);
	if (irq_prop->val.len % (irq_cells * sizeof(cell_t))) {
		FAIL_PROP(c, dti, node, prop,
			  "size is (%d), expected multiple of %d",
			  irq_prop->val.len, (int)(irq_cells * sizeof(cell_t)));
	}
}
WARNING(interrupts_property, check_interrupts_property, &phandle_references);

static const struct bus_type graph_port_bus = {
	.name = "graph-port",
};

static const struct bus_type graph_ports_bus = {
	.name = "graph-ports",
};

static void check_graph_nodes(struct check *c, struct dt_info *dti,
			      struct node *node)
{
	struct node *child;

	for_each_child(node, child) {
		if (!(strprefixeq(child->name, child->basenamelen, "endpoint") ||
		      get_property(child, "remote-endpoint")))
			continue;

		node->bus = &graph_port_bus;

		/* The parent of 'port' nodes can be either 'ports' or a device */
		if (!node->parent->bus &&
		    (streq(node->parent->name, "ports") || get_property(node, "reg")))
			node->parent->bus = &graph_ports_bus;

		break;
	}

}
WARNING(graph_nodes, check_graph_nodes, NULL);

static void check_graph_child_address(struct check *c, struct dt_info *dti,
				      struct node *node)
{
	int cnt = 0;
	struct node *child;

	if (node->bus != &graph_ports_bus && node->bus != &graph_port_bus)
		return;

	for_each_child(node, child) {
		struct property *prop = get_property(child, "reg");

		/* No error if we have any non-zero unit address */
		if (prop && propval_cell(prop) != 0)
			return;

		cnt++;
	}

	if (cnt == 1 && node->addr_cells != -1)
		FAIL(c, dti, node, "graph node has single child node '%s', #address-cells/#size-cells are not necessary",
		     node->children->name);
}
WARNING(graph_child_address, check_graph_child_address, NULL, &graph_nodes);

static void check_graph_reg(struct check *c, struct dt_info *dti,
			    struct node *node)
{
	char unit_addr[9];
	const char *unitname = get_unitname(node);
	struct property *prop;

	prop = get_property(node, "reg");
	if (!prop || !unitname)
		return;

	if (!(prop->val.val && prop->val.len == sizeof(cell_t))) {
		FAIL(c, dti, node, "graph node malformed 'reg' property");
		return;
	}

	snprintf(unit_addr, sizeof(unit_addr), "%x", propval_cell(prop));
	if (!streq(unitname, unit_addr))
		FAIL(c, dti, node, "graph node unit address error, expected \"%s\"",
		     unit_addr);

	if (node->parent->addr_cells != 1)
		FAIL_PROP(c, dti, node, get_property(node, "#address-cells"),
			  "graph node '#address-cells' is %d, must be 1",
			  node->parent->addr_cells);
	if (node->parent->size_cells != 0)
		FAIL_PROP(c, dti, node, get_property(node, "#size-cells"),
			  "graph node '#size-cells' is %d, must be 0",
			  node->parent->size_cells);
}

static void check_graph_port(struct check *c, struct dt_info *dti,
			     struct node *node)
{
	if (node->bus != &graph_port_bus)
		return;

	if (!strprefixeq(node->name, node->basenamelen, "port"))
		FAIL(c, dti, node, "graph port node name should be 'port'");

	check_graph_reg(c, dti, node);
}
WARNING(graph_port, check_graph_port, NULL, &graph_nodes);

static struct node *get_remote_endpoint(struct check *c, struct dt_info *dti,
					struct node *endpoint)
{
	int phandle;
	struct node *node;
	struct property *prop;

	prop = get_property(endpoint, "remote-endpoint");
	if (!prop)
		return NULL;

	phandle = propval_cell(prop);
	/* Give up if this is an overlay with external references */
	if (phandle == 0 || phandle == -1)
		return NULL;

	node = get_node_by_phandle(dti->dt, phandle);
	if (!node)
		FAIL_PROP(c, dti, endpoint, prop, "graph phandle is not valid");

	return node;
}

static void check_graph_endpoint(struct check *c, struct dt_info *dti,
				 struct node *node)
{
	struct node *remote_node;

	if (!node->parent || node->parent->bus != &graph_port_bus)
		return;

	if (!strprefixeq(node->name, node->basenamelen, "endpoint"))
		FAIL(c, dti, node, "graph endpoint node name should be 'endpoint'");

	check_graph_reg(c, dti, node);

	remote_node = get_remote_endpoint(c, dti, node);
	if (!remote_node)
		return;

	if (get_remote_endpoint(c, dti, remote_node) != node)
		FAIL(c, dti, node, "graph connection to node '%s' is not bidirectional",
		     remote_node->fullpath);
}
WARNING(graph_endpoint, check_graph_endpoint, NULL, &graph_nodes);

static struct check *check_table[] = {
	&duplicate_node_names, &duplicate_property_names,
	&node_name_chars, &node_name_format, &property_name_chars,
	&name_is_string, &name_properties,

	&duplicate_label,

	&explicit_phandles,
	&phandle_references, &path_references,
	&omit_unused_nodes,

	&address_cells_is_cell, &size_cells_is_cell, &interrupt_cells_is_cell,
	&device_type_is_string, &model_is_string, &status_is_string,
	&label_is_string,

	&compatible_is_string_list, &names_is_string_list,

	&property_name_chars_strict,
	&node_name_chars_strict,

	&addr_size_cells, &reg_format, &ranges_format, &dma_ranges_format,

	&unit_address_vs_reg,
	&unit_address_format,

	&pci_bridge,
	&pci_device_reg,
	&pci_device_bus_num,

	&simple_bus_bridge,
	&simple_bus_reg,

	&i2c_bus_bridge,
	&i2c_bus_reg,

	&spi_bus_bridge,
	&spi_bus_reg,

	&avoid_default_addr_size,
	&avoid_unnecessary_addr_size,
	&unique_unit_address,
	&unique_unit_address_if_enabled,
	&obsolete_chosen_interrupt_controller,
	&chosen_node_is_root, &chosen_node_bootargs, &chosen_node_stdout_path,

	&clocks_property,
	&cooling_device_property,
	&dmas_property,
	&hwlocks_property,
	&interrupts_extended_property,
	&io_channels_property,
	&iommus_property,
	&mboxes_property,
	&msi_parent_property,
	&mux_controls_property,
	&phys_property,
	&power_domains_property,
	&pwms_property,
	&resets_property,
	&sound_dai_property,
	&thermal_sensors_property,

	&deprecated_gpio_property,
	&gpios_property,
	&interrupts_property,

	&alias_paths,

	&graph_nodes, &graph_child_address, &graph_port, &graph_endpoint,

	&always_fail,
};

static void enable_warning_error(struct check *c, bool warn, bool error)
{
	int i;

	/* Raising level, also raise it for prereqs */
	if ((warn && !c->warn) || (error && !c->error))
		for (i = 0; i < c->num_prereqs; i++)
			enable_warning_error(c->prereq[i], warn, error);

	c->warn = c->warn || warn;
	c->error = c->error || error;
}

static void disable_warning_error(struct check *c, bool warn, bool error)
{
	int i;

	/* Lowering level, also lower it for things this is the prereq
	 * for */
	if ((warn && c->warn) || (error && c->error)) {
		for (i = 0; i < ARRAY_SIZE(check_table); i++) {
			struct check *cc = check_table[i];
			int j;

			for (j = 0; j < cc->num_prereqs; j++)
				if (cc->prereq[j] == c)
					disable_warning_error(cc, warn, error);
		}
	}

	c->warn = c->warn && !warn;
	c->error = c->error && !error;
}

void parse_checks_option(bool warn, bool error, const char *arg)
{
	int i;
	const char *name = arg;
	bool enable = true;

	if ((strncmp(arg, "no-", 3) == 0)
	    || (strncmp(arg, "no_", 3) == 0)) {
		name = arg + 3;
		enable = false;
	}

	for (i = 0; i < ARRAY_SIZE(check_table); i++) {
		struct check *c = check_table[i];

		if (streq(c->name, name)) {
			if (enable)
				enable_warning_error(c, warn, error);
			else
				disable_warning_error(c, warn, error);
			return;
		}
	}

	die("Unrecognized check name \"%s\"\n", name);
}

void process_checks(bool force, struct dt_info *dti)
{
	int i;
	int error = 0;

	for (i = 0; i < ARRAY_SIZE(check_table); i++) {
		struct check *c = check_table[i];

		if (c->warn || c->error)
			error = error || run_check(c, dti);
	}

	if (error) {
		if (!force) {
			fprintf(stderr, "ERROR: Input tree has errors, aborting "
				"(use -f to force output)\n");
			exit(2);
		} else if (quiet < 3) {
			fprintf(stderr, "Warning: Input tree has errors, "
				"output forced\n");
		}
	}
}