summaryrefslogtreecommitdiff
path: root/drivers/of/unittest.c
blob: e5b0eea8011c89a0806533506671e2612c27f2a3 (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
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
// SPDX-License-Identifier: GPL-2.0
/*
 * Self tests for device tree subsystem
 */

#define pr_fmt(fmt) "### dt-test ### " fmt

#include <linux/memblock.h>
#include <linux/clk.h>
#include <linux/dma-direct.h> /* to test phys_to_dma/dma_to_phys */
#include <linux/err.h>
#include <linux/errno.h>
#include <linux/hashtable.h>
#include <linux/libfdt.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_fdt.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/kernel.h>

#include <linux/i2c.h>
#include <linux/i2c-mux.h>
#include <linux/gpio/driver.h>

#include <linux/bitops.h>

#include "of_private.h"

static struct unittest_results {
	int passed;
	int failed;
} unittest_results;

#define unittest(result, fmt, ...) ({ \
	bool failed = !(result); \
	if (failed) { \
		unittest_results.failed++; \
		pr_err("FAIL %s():%i " fmt, __func__, __LINE__, ##__VA_ARGS__); \
	} else { \
		unittest_results.passed++; \
		pr_info("pass %s():%i\n", __func__, __LINE__); \
	} \
	failed; \
})

/*
 * Expected message may have a message level other than KERN_INFO.
 * Print the expected message only if the current loglevel will allow
 * the actual message to print.
 *
 * Do not use EXPECT_BEGIN(), EXPECT_END(), EXPECT_NOT_BEGIN(), or
 * EXPECT_NOT_END() to report messages expected to be reported or not
 * reported by pr_debug().
 */
#define EXPECT_BEGIN(level, fmt, ...) \
	printk(level pr_fmt("EXPECT \\ : ") fmt, ##__VA_ARGS__)

#define EXPECT_END(level, fmt, ...) \
	printk(level pr_fmt("EXPECT / : ") fmt, ##__VA_ARGS__)

#define EXPECT_NOT_BEGIN(level, fmt, ...) \
	printk(level pr_fmt("EXPECT_NOT \\ : ") fmt, ##__VA_ARGS__)

#define EXPECT_NOT_END(level, fmt, ...) \
	printk(level pr_fmt("EXPECT_NOT / : ") fmt, ##__VA_ARGS__)

static void __init of_unittest_find_node_by_name(void)
{
	struct device_node *np;
	const char *options, *name;

	np = of_find_node_by_path("/testcase-data");
	name = kasprintf(GFP_KERNEL, "%pOF", np);
	unittest(np && name && !strcmp("/testcase-data", name),
		"find /testcase-data failed\n");
	of_node_put(np);
	kfree(name);

	/* Test if trailing '/' works */
	np = of_find_node_by_path("/testcase-data/");
	unittest(!np, "trailing '/' on /testcase-data/ should fail\n");

	np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
	name = kasprintf(GFP_KERNEL, "%pOF", np);
	unittest(np && name && !strcmp("/testcase-data/phandle-tests/consumer-a", name),
		"find /testcase-data/phandle-tests/consumer-a failed\n");
	of_node_put(np);
	kfree(name);

	np = of_find_node_by_path("testcase-alias");
	name = kasprintf(GFP_KERNEL, "%pOF", np);
	unittest(np && name && !strcmp("/testcase-data", name),
		"find testcase-alias failed\n");
	of_node_put(np);
	kfree(name);

	/* Test if trailing '/' works on aliases */
	np = of_find_node_by_path("testcase-alias/");
	unittest(!np, "trailing '/' on testcase-alias/ should fail\n");

	np = of_find_node_by_path("testcase-alias/phandle-tests/consumer-a");
	name = kasprintf(GFP_KERNEL, "%pOF", np);
	unittest(np && name && !strcmp("/testcase-data/phandle-tests/consumer-a", name),
		"find testcase-alias/phandle-tests/consumer-a failed\n");
	of_node_put(np);
	kfree(name);

	np = of_find_node_by_path("/testcase-data/missing-path");
	unittest(!np, "non-existent path returned node %pOF\n", np);
	of_node_put(np);

	np = of_find_node_by_path("missing-alias");
	unittest(!np, "non-existent alias returned node %pOF\n", np);
	of_node_put(np);

	np = of_find_node_by_path("testcase-alias/missing-path");
	unittest(!np, "non-existent alias with relative path returned node %pOF\n", np);
	of_node_put(np);

	np = of_find_node_opts_by_path("/testcase-data:testoption", &options);
	unittest(np && !strcmp("testoption", options),
		 "option path test failed\n");
	of_node_put(np);

	np = of_find_node_opts_by_path("/testcase-data:test/option", &options);
	unittest(np && !strcmp("test/option", options),
		 "option path test, subcase #1 failed\n");
	of_node_put(np);

	np = of_find_node_opts_by_path("/testcase-data/testcase-device1:test/option", &options);
	unittest(np && !strcmp("test/option", options),
		 "option path test, subcase #2 failed\n");
	of_node_put(np);

	np = of_find_node_opts_by_path("/testcase-data:testoption", NULL);
	unittest(np, "NULL option path test failed\n");
	of_node_put(np);

	np = of_find_node_opts_by_path("testcase-alias:testaliasoption",
				       &options);
	unittest(np && !strcmp("testaliasoption", options),
		 "option alias path test failed\n");
	of_node_put(np);

	np = of_find_node_opts_by_path("testcase-alias:test/alias/option",
				       &options);
	unittest(np && !strcmp("test/alias/option", options),
		 "option alias path test, subcase #1 failed\n");
	of_node_put(np);

	np = of_find_node_opts_by_path("testcase-alias:testaliasoption", NULL);
	unittest(np, "NULL option alias path test failed\n");
	of_node_put(np);

	options = "testoption";
	np = of_find_node_opts_by_path("testcase-alias", &options);
	unittest(np && !options, "option clearing test failed\n");
	of_node_put(np);

	options = "testoption";
	np = of_find_node_opts_by_path("/", &options);
	unittest(np && !options, "option clearing root node test failed\n");
	of_node_put(np);
}

static void __init of_unittest_dynamic(void)
{
	struct device_node *np;
	struct property *prop;

	np = of_find_node_by_path("/testcase-data");
	if (!np) {
		pr_err("missing testcase data\n");
		return;
	}

	/* Array of 4 properties for the purpose of testing */
	prop = kcalloc(4, sizeof(*prop), GFP_KERNEL);
	if (!prop) {
		unittest(0, "kzalloc() failed\n");
		return;
	}

	/* Add a new property - should pass*/
	prop->name = "new-property";
	prop->value = "new-property-data";
	prop->length = strlen(prop->value) + 1;
	unittest(of_add_property(np, prop) == 0, "Adding a new property failed\n");

	/* Try to add an existing property - should fail */
	prop++;
	prop->name = "new-property";
	prop->value = "new-property-data-should-fail";
	prop->length = strlen(prop->value) + 1;
	unittest(of_add_property(np, prop) != 0,
		 "Adding an existing property should have failed\n");

	/* Try to modify an existing property - should pass */
	prop->value = "modify-property-data-should-pass";
	prop->length = strlen(prop->value) + 1;
	unittest(of_update_property(np, prop) == 0,
		 "Updating an existing property should have passed\n");

	/* Try to modify non-existent property - should pass*/
	prop++;
	prop->name = "modify-property";
	prop->value = "modify-missing-property-data-should-pass";
	prop->length = strlen(prop->value) + 1;
	unittest(of_update_property(np, prop) == 0,
		 "Updating a missing property should have passed\n");

	/* Remove property - should pass */
	unittest(of_remove_property(np, prop) == 0,
		 "Removing a property should have passed\n");

	/* Adding very large property - should pass */
	prop++;
	prop->name = "large-property-PAGE_SIZEx8";
	prop->length = PAGE_SIZE * 8;
	prop->value = kzalloc(prop->length, GFP_KERNEL);
	unittest(prop->value != NULL, "Unable to allocate large buffer\n");
	if (prop->value)
		unittest(of_add_property(np, prop) == 0,
			 "Adding a large property should have passed\n");
}

static int __init of_unittest_check_node_linkage(struct device_node *np)
{
	struct device_node *child;
	int count = 0, rc;

	for_each_child_of_node(np, child) {
		if (child->parent != np) {
			pr_err("Child node %pOFn links to wrong parent %pOFn\n",
				 child, np);
			rc = -EINVAL;
			goto put_child;
		}

		rc = of_unittest_check_node_linkage(child);
		if (rc < 0)
			goto put_child;
		count += rc;
	}

	return count + 1;
put_child:
	of_node_put(child);
	return rc;
}

static void __init of_unittest_check_tree_linkage(void)
{
	struct device_node *np;
	int allnode_count = 0, child_count;

	if (!of_root)
		return;

	for_each_of_allnodes(np)
		allnode_count++;
	child_count = of_unittest_check_node_linkage(of_root);

	unittest(child_count > 0, "Device node data structure is corrupted\n");
	unittest(child_count == allnode_count,
		 "allnodes list size (%i) doesn't match sibling lists size (%i)\n",
		 allnode_count, child_count);
	pr_debug("allnodes list size (%i); sibling lists size (%i)\n", allnode_count, child_count);
}

static void __init of_unittest_printf_one(struct device_node *np, const char *fmt,
					  const char *expected)
{
	unsigned char *buf;
	int buf_size;
	int size, i;

	buf_size = strlen(expected) + 10;
	buf = kmalloc(buf_size, GFP_KERNEL);
	if (!buf)
		return;

	/* Baseline; check conversion with a large size limit */
	memset(buf, 0xff, buf_size);
	size = snprintf(buf, buf_size - 2, fmt, np);

	/* use strcmp() instead of strncmp() here to be absolutely sure strings match */
	unittest((strcmp(buf, expected) == 0) && (buf[size+1] == 0xff),
		"sprintf failed; fmt='%s' expected='%s' rslt='%s'\n",
		fmt, expected, buf);

	/* Make sure length limits work */
	size++;
	for (i = 0; i < 2; i++, size--) {
		/* Clear the buffer, and make sure it works correctly still */
		memset(buf, 0xff, buf_size);
		snprintf(buf, size+1, fmt, np);
		unittest(strncmp(buf, expected, size) == 0 && (buf[size+1] == 0xff),
			"snprintf failed; size=%i fmt='%s' expected='%s' rslt='%s'\n",
			size, fmt, expected, buf);
	}
	kfree(buf);
}

static void __init of_unittest_printf(void)
{
	struct device_node *np;
	const char *full_name = "/testcase-data/platform-tests/test-device@1/dev@100";
	char phandle_str[16] = "";

	np = of_find_node_by_path(full_name);
	if (!np) {
		unittest(np, "testcase data missing\n");
		return;
	}

	num_to_str(phandle_str, sizeof(phandle_str), np->phandle, 0);

	of_unittest_printf_one(np, "%pOF",  full_name);
	of_unittest_printf_one(np, "%pOFf", full_name);
	of_unittest_printf_one(np, "%pOFn", "dev");
	of_unittest_printf_one(np, "%2pOFn", "dev");
	of_unittest_printf_one(np, "%5pOFn", "  dev");
	of_unittest_printf_one(np, "%pOFnc", "dev:test-sub-device");
	of_unittest_printf_one(np, "%pOFp", phandle_str);
	of_unittest_printf_one(np, "%pOFP", "dev@100");
	of_unittest_printf_one(np, "ABC %pOFP ABC", "ABC dev@100 ABC");
	of_unittest_printf_one(np, "%10pOFP", "   dev@100");
	of_unittest_printf_one(np, "%-10pOFP", "dev@100   ");
	of_unittest_printf_one(of_root, "%pOFP", "/");
	of_unittest_printf_one(np, "%pOFF", "----");
	of_unittest_printf_one(np, "%pOFPF", "dev@100:----");
	of_unittest_printf_one(np, "%pOFPFPc", "dev@100:----:dev@100:test-sub-device");
	of_unittest_printf_one(np, "%pOFc", "test-sub-device");
	of_unittest_printf_one(np, "%pOFC",
			"\"test-sub-device\",\"test-compat2\",\"test-compat3\"");
}

struct node_hash {
	struct hlist_node node;
	struct device_node *np;
};

static DEFINE_HASHTABLE(phandle_ht, 8);
static void __init of_unittest_check_phandles(void)
{
	struct device_node *np;
	struct node_hash *nh;
	struct hlist_node *tmp;
	int i, dup_count = 0, phandle_count = 0;

	for_each_of_allnodes(np) {
		if (!np->phandle)
			continue;

		hash_for_each_possible(phandle_ht, nh, node, np->phandle) {
			if (nh->np->phandle == np->phandle) {
				pr_info("Duplicate phandle! %i used by %pOF and %pOF\n",
					np->phandle, nh->np, np);
				dup_count++;
				break;
			}
		}

		nh = kzalloc(sizeof(*nh), GFP_KERNEL);
		if (!nh)
			return;

		nh->np = np;
		hash_add(phandle_ht, &nh->node, np->phandle);
		phandle_count++;
	}
	unittest(dup_count == 0, "Found %i duplicates in %i phandles\n",
		 dup_count, phandle_count);

	/* Clean up */
	hash_for_each_safe(phandle_ht, i, tmp, nh, node) {
		hash_del(&nh->node);
		kfree(nh);
	}
}

static void __init of_unittest_parse_phandle_with_args(void)
{
	struct device_node *np;
	struct of_phandle_args args;
	int i, rc;

	np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
	if (!np) {
		pr_err("missing testcase data\n");
		return;
	}

	rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
	unittest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc);

	for (i = 0; i < 8; i++) {
		bool passed = true;

		memset(&args, 0, sizeof(args));
		rc = of_parse_phandle_with_args(np, "phandle-list",
						"#phandle-cells", i, &args);

		/* Test the values from tests-phandle.dtsi */
		switch (i) {
		case 0:
			passed &= !rc;
			passed &= (args.args_count == 1);
			passed &= (args.args[0] == (i + 1));
			break;
		case 1:
			passed &= !rc;
			passed &= (args.args_count == 2);
			passed &= (args.args[0] == (i + 1));
			passed &= (args.args[1] == 0);
			break;
		case 2:
			passed &= (rc == -ENOENT);
			break;
		case 3:
			passed &= !rc;
			passed &= (args.args_count == 3);
			passed &= (args.args[0] == (i + 1));
			passed &= (args.args[1] == 4);
			passed &= (args.args[2] == 3);
			break;
		case 4:
			passed &= !rc;
			passed &= (args.args_count == 2);
			passed &= (args.args[0] == (i + 1));
			passed &= (args.args[1] == 100);
			break;
		case 5:
			passed &= !rc;
			passed &= (args.args_count == 0);
			break;
		case 6:
			passed &= !rc;
			passed &= (args.args_count == 1);
			passed &= (args.args[0] == (i + 1));
			break;
		case 7:
			passed &= (rc == -ENOENT);
			break;
		default:
			passed = false;
		}

		unittest(passed, "index %i - data error on node %pOF rc=%i\n",
			 i, args.np, rc);
	}

	/* Check for missing list property */
	memset(&args, 0, sizeof(args));
	rc = of_parse_phandle_with_args(np, "phandle-list-missing",
					"#phandle-cells", 0, &args);
	unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
	rc = of_count_phandle_with_args(np, "phandle-list-missing",
					"#phandle-cells");
	unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);

	/* Check for missing cells property */
	memset(&args, 0, sizeof(args));

	EXPECT_BEGIN(KERN_INFO,
		     "OF: /testcase-data/phandle-tests/consumer-a: could not get #phandle-cells-missing for /testcase-data/phandle-tests/provider1");

	rc = of_parse_phandle_with_args(np, "phandle-list",
					"#phandle-cells-missing", 0, &args);

	EXPECT_END(KERN_INFO,
		   "OF: /testcase-data/phandle-tests/consumer-a: could not get #phandle-cells-missing for /testcase-data/phandle-tests/provider1");

	unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);

	EXPECT_BEGIN(KERN_INFO,
		     "OF: /testcase-data/phandle-tests/consumer-a: could not get #phandle-cells-missing for /testcase-data/phandle-tests/provider1");

	rc = of_count_phandle_with_args(np, "phandle-list",
					"#phandle-cells-missing");

	EXPECT_END(KERN_INFO,
		   "OF: /testcase-data/phandle-tests/consumer-a: could not get #phandle-cells-missing for /testcase-data/phandle-tests/provider1");

	unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);

	/* Check for bad phandle in list */
	memset(&args, 0, sizeof(args));

	EXPECT_BEGIN(KERN_INFO,
		     "OF: /testcase-data/phandle-tests/consumer-a: could not find phandle");

	rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle",
					"#phandle-cells", 0, &args);

	EXPECT_END(KERN_INFO,
		   "OF: /testcase-data/phandle-tests/consumer-a: could not find phandle");

	unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);

	EXPECT_BEGIN(KERN_INFO,
		     "OF: /testcase-data/phandle-tests/consumer-a: could not find phandle");

	rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle",
					"#phandle-cells");

	EXPECT_END(KERN_INFO,
		   "OF: /testcase-data/phandle-tests/consumer-a: could not find phandle");

	unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);

	/* Check for incorrectly formed argument list */
	memset(&args, 0, sizeof(args));

	EXPECT_BEGIN(KERN_INFO,
		     "OF: /testcase-data/phandle-tests/consumer-a: #phandle-cells = 3 found 1");

	rc = of_parse_phandle_with_args(np, "phandle-list-bad-args",
					"#phandle-cells", 1, &args);

	EXPECT_END(KERN_INFO,
		   "OF: /testcase-data/phandle-tests/consumer-a: #phandle-cells = 3 found 1");

	unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);

	EXPECT_BEGIN(KERN_INFO,
		     "OF: /testcase-data/phandle-tests/consumer-a: #phandle-cells = 3 found 1");

	rc = of_count_phandle_with_args(np, "phandle-list-bad-args",
					"#phandle-cells");

	EXPECT_END(KERN_INFO,
		   "OF: /testcase-data/phandle-tests/consumer-a: #phandle-cells = 3 found 1");

	unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
}

static void __init of_unittest_parse_phandle_with_args_map(void)
{
	struct device_node *np, *p0, *p1, *p2, *p3;
	struct of_phandle_args args;
	int i, rc;

	np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-b");
	if (!np) {
		pr_err("missing testcase data\n");
		return;
	}

	p0 = of_find_node_by_path("/testcase-data/phandle-tests/provider0");
	if (!p0) {
		pr_err("missing testcase data\n");
		return;
	}

	p1 = of_find_node_by_path("/testcase-data/phandle-tests/provider1");
	if (!p1) {
		pr_err("missing testcase data\n");
		return;
	}

	p2 = of_find_node_by_path("/testcase-data/phandle-tests/provider2");
	if (!p2) {
		pr_err("missing testcase data\n");
		return;
	}

	p3 = of_find_node_by_path("/testcase-data/phandle-tests/provider3");
	if (!p3) {
		pr_err("missing testcase data\n");
		return;
	}

	rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
	unittest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc);

	for (i = 0; i < 8; i++) {
		bool passed = true;

		memset(&args, 0, sizeof(args));
		rc = of_parse_phandle_with_args_map(np, "phandle-list",
						    "phandle", i, &args);

		/* Test the values from tests-phandle.dtsi */
		switch (i) {
		case 0:
			passed &= !rc;
			passed &= (args.np == p1);
			passed &= (args.args_count == 1);
			passed &= (args.args[0] == 1);
			break;
		case 1:
			passed &= !rc;
			passed &= (args.np == p3);
			passed &= (args.args_count == 3);
			passed &= (args.args[0] == 2);
			passed &= (args.args[1] == 5);
			passed &= (args.args[2] == 3);
			break;
		case 2:
			passed &= (rc == -ENOENT);
			break;
		case 3:
			passed &= !rc;
			passed &= (args.np == p0);
			passed &= (args.args_count == 0);
			break;
		case 4:
			passed &= !rc;
			passed &= (args.np == p1);
			passed &= (args.args_count == 1);
			passed &= (args.args[0] == 3);
			break;
		case 5:
			passed &= !rc;
			passed &= (args.np == p0);
			passed &= (args.args_count == 0);
			break;
		case 6:
			passed &= !rc;
			passed &= (args.np == p2);
			passed &= (args.args_count == 2);
			passed &= (args.args[0] == 15);
			passed &= (args.args[1] == 0x20);
			break;
		case 7:
			passed &= (rc == -ENOENT);
			break;
		default:
			passed = false;
		}

		unittest(passed, "index %i - data error on node %s rc=%i\n",
			 i, args.np->full_name, rc);
	}

	/* Check for missing list property */
	memset(&args, 0, sizeof(args));
	rc = of_parse_phandle_with_args_map(np, "phandle-list-missing",
					    "phandle", 0, &args);
	unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);

	/* Check for missing cells,map,mask property */
	memset(&args, 0, sizeof(args));

	EXPECT_BEGIN(KERN_INFO,
		     "OF: /testcase-data/phandle-tests/consumer-b: could not get #phandle-missing-cells for /testcase-data/phandle-tests/provider1");

	rc = of_parse_phandle_with_args_map(np, "phandle-list",
					    "phandle-missing", 0, &args);
	EXPECT_END(KERN_INFO,
		   "OF: /testcase-data/phandle-tests/consumer-b: could not get #phandle-missing-cells for /testcase-data/phandle-tests/provider1");

	unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);

	/* Check for bad phandle in list */
	memset(&args, 0, sizeof(args));

	EXPECT_BEGIN(KERN_INFO,
		     "OF: /testcase-data/phandle-tests/consumer-b: could not find phandle");

	rc = of_parse_phandle_with_args_map(np, "phandle-list-bad-phandle",
					    "phandle", 0, &args);
	EXPECT_END(KERN_INFO,
		   "OF: /testcase-data/phandle-tests/consumer-b: could not find phandle");

	unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);

	/* Check for incorrectly formed argument list */
	memset(&args, 0, sizeof(args));

	EXPECT_BEGIN(KERN_INFO,
		     "OF: /testcase-data/phandle-tests/consumer-b: #phandle-cells = 2 found 1");

	rc = of_parse_phandle_with_args_map(np, "phandle-list-bad-args",
					    "phandle", 1, &args);
	EXPECT_END(KERN_INFO,
		   "OF: /testcase-data/phandle-tests/consumer-b: #phandle-cells = 2 found 1");

	unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
}

static void __init of_unittest_property_string(void)
{
	const char *strings[4];
	struct device_node *np;
	int rc;

	np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
	if (!np) {
		pr_err("No testcase data in device tree\n");
		return;
	}

	rc = of_property_match_string(np, "phandle-list-names", "first");
	unittest(rc == 0, "first expected:0 got:%i\n", rc);
	rc = of_property_match_string(np, "phandle-list-names", "second");
	unittest(rc == 1, "second expected:1 got:%i\n", rc);
	rc = of_property_match_string(np, "phandle-list-names", "third");
	unittest(rc == 2, "third expected:2 got:%i\n", rc);
	rc = of_property_match_string(np, "phandle-list-names", "fourth");
	unittest(rc == -ENODATA, "unmatched string; rc=%i\n", rc);
	rc = of_property_match_string(np, "missing-property", "blah");
	unittest(rc == -EINVAL, "missing property; rc=%i\n", rc);
	rc = of_property_match_string(np, "empty-property", "blah");
	unittest(rc == -ENODATA, "empty property; rc=%i\n", rc);
	rc = of_property_match_string(np, "unterminated-string", "blah");
	unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);

	/* of_property_count_strings() tests */
	rc = of_property_count_strings(np, "string-property");
	unittest(rc == 1, "Incorrect string count; rc=%i\n", rc);
	rc = of_property_count_strings(np, "phandle-list-names");
	unittest(rc == 3, "Incorrect string count; rc=%i\n", rc);
	rc = of_property_count_strings(np, "unterminated-string");
	unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
	rc = of_property_count_strings(np, "unterminated-string-list");
	unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);

	/* of_property_read_string_index() tests */
	rc = of_property_read_string_index(np, "string-property", 0, strings);
	unittest(rc == 0 && !strcmp(strings[0], "foobar"), "of_property_read_string_index() failure; rc=%i\n", rc);
	strings[0] = NULL;
	rc = of_property_read_string_index(np, "string-property", 1, strings);
	unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
	rc = of_property_read_string_index(np, "phandle-list-names", 0, strings);
	unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
	rc = of_property_read_string_index(np, "phandle-list-names", 1, strings);
	unittest(rc == 0 && !strcmp(strings[0], "second"), "of_property_read_string_index() failure; rc=%i\n", rc);
	rc = of_property_read_string_index(np, "phandle-list-names", 2, strings);
	unittest(rc == 0 && !strcmp(strings[0], "third"), "of_property_read_string_index() failure; rc=%i\n", rc);
	strings[0] = NULL;
	rc = of_property_read_string_index(np, "phandle-list-names", 3, strings);
	unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
	strings[0] = NULL;
	rc = of_property_read_string_index(np, "unterminated-string", 0, strings);
	unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
	rc = of_property_read_string_index(np, "unterminated-string-list", 0, strings);
	unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
	strings[0] = NULL;
	rc = of_property_read_string_index(np, "unterminated-string-list", 2, strings); /* should fail */
	unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
	strings[1] = NULL;

	/* of_property_read_string_array() tests */
	rc = of_property_read_string_array(np, "string-property", strings, 4);
	unittest(rc == 1, "Incorrect string count; rc=%i\n", rc);
	rc = of_property_read_string_array(np, "phandle-list-names", strings, 4);
	unittest(rc == 3, "Incorrect string count; rc=%i\n", rc);
	rc = of_property_read_string_array(np, "unterminated-string", strings, 4);
	unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
	/* -- An incorrectly formed string should cause a failure */
	rc = of_property_read_string_array(np, "unterminated-string-list", strings, 4);
	unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
	/* -- parsing the correctly formed strings should still work: */
	strings[2] = NULL;
	rc = of_property_read_string_array(np, "unterminated-string-list", strings, 2);
	unittest(rc == 2 && strings[2] == NULL, "of_property_read_string_array() failure; rc=%i\n", rc);
	strings[1] = NULL;
	rc = of_property_read_string_array(np, "phandle-list-names", strings, 1);
	unittest(rc == 1 && strings[1] == NULL, "Overwrote end of string array; rc=%i, str='%s'\n", rc, strings[1]);
}

#define propcmp(p1, p2) (((p1)->length == (p2)->length) && \
			(p1)->value && (p2)->value && \
			!memcmp((p1)->value, (p2)->value, (p1)->length) && \
			!strcmp((p1)->name, (p2)->name))
static void __init of_unittest_property_copy(void)
{
#ifdef CONFIG_OF_DYNAMIC
	struct property p1 = { .name = "p1", .length = 0, .value = "" };
	struct property p2 = { .name = "p2", .length = 5, .value = "abcd" };
	struct property *new;

	new = __of_prop_dup(&p1, GFP_KERNEL);
	unittest(new && propcmp(&p1, new), "empty property didn't copy correctly\n");
	kfree(new->value);
	kfree(new->name);
	kfree(new);

	new = __of_prop_dup(&p2, GFP_KERNEL);
	unittest(new && propcmp(&p2, new), "non-empty property didn't copy correctly\n");
	kfree(new->value);
	kfree(new->name);
	kfree(new);
#endif
}

static void __init of_unittest_changeset(void)
{
#ifdef CONFIG_OF_DYNAMIC
	struct property *ppadd, padd = { .name = "prop-add", .length = 1, .value = "" };
	struct property *ppname_n1,  pname_n1  = { .name = "name", .length = 3, .value = "n1"  };
	struct property *ppname_n2,  pname_n2  = { .name = "name", .length = 3, .value = "n2"  };
	struct property *ppname_n21, pname_n21 = { .name = "name", .length = 3, .value = "n21" };
	struct property *ppupdate, pupdate = { .name = "prop-update", .length = 5, .value = "abcd" };
	struct property *ppremove;
	struct device_node *n1, *n2, *n21, *nchangeset, *nremove, *parent, *np;
	struct of_changeset chgset;

	n1 = __of_node_dup(NULL, "n1");
	unittest(n1, "testcase setup failure\n");

	n2 = __of_node_dup(NULL, "n2");
	unittest(n2, "testcase setup failure\n");

	n21 = __of_node_dup(NULL, "n21");
	unittest(n21, "testcase setup failure %p\n", n21);

	nchangeset = of_find_node_by_path("/testcase-data/changeset");
	nremove = of_get_child_by_name(nchangeset, "node-remove");
	unittest(nremove, "testcase setup failure\n");

	ppadd = __of_prop_dup(&padd, GFP_KERNEL);
	unittest(ppadd, "testcase setup failure\n");

	ppname_n1  = __of_prop_dup(&pname_n1, GFP_KERNEL);
	unittest(ppname_n1, "testcase setup failure\n");

	ppname_n2  = __of_prop_dup(&pname_n2, GFP_KERNEL);
	unittest(ppname_n2, "testcase setup failure\n");

	ppname_n21 = __of_prop_dup(&pname_n21, GFP_KERNEL);
	unittest(ppname_n21, "testcase setup failure\n");

	ppupdate = __of_prop_dup(&pupdate, GFP_KERNEL);
	unittest(ppupdate, "testcase setup failure\n");

	parent = nchangeset;
	n1->parent = parent;
	n2->parent = parent;
	n21->parent = n2;

	ppremove = of_find_property(parent, "prop-remove", NULL);
	unittest(ppremove, "failed to find removal prop");

	of_changeset_init(&chgset);

	unittest(!of_changeset_attach_node(&chgset, n1), "fail attach n1\n");
	unittest(!of_changeset_add_property(&chgset, n1, ppname_n1), "fail add prop name\n");

	unittest(!of_changeset_attach_node(&chgset, n2), "fail attach n2\n");
	unittest(!of_changeset_add_property(&chgset, n2, ppname_n2), "fail add prop name\n");

	unittest(!of_changeset_detach_node(&chgset, nremove), "fail remove node\n");
	unittest(!of_changeset_add_property(&chgset, n21, ppname_n21), "fail add prop name\n");

	unittest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n");

	unittest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop prop-add\n");
	unittest(!of_changeset_update_property(&chgset, parent, ppupdate), "fail update prop\n");
	unittest(!of_changeset_remove_property(&chgset, parent, ppremove), "fail remove prop\n");

	unittest(!of_changeset_apply(&chgset), "apply failed\n");

	of_node_put(nchangeset);

	/* Make sure node names are constructed correctly */
	unittest((np = of_find_node_by_path("/testcase-data/changeset/n2/n21")),
		 "'%pOF' not added\n", n21);
	of_node_put(np);

	unittest(!of_changeset_revert(&chgset), "revert failed\n");

	of_changeset_destroy(&chgset);

	of_node_put(n1);
	of_node_put(n2);
	of_node_put(n21);
#endif
}

static void __init of_unittest_dma_get_max_cpu_address(void)
{
	struct device_node *np;
	phys_addr_t cpu_addr;

	if (!IS_ENABLED(CONFIG_OF_ADDRESS))
		return;

	np = of_find_node_by_path("/testcase-data/address-tests");
	if (!np) {
		pr_err("missing testcase data\n");
		return;
	}

	cpu_addr = of_dma_get_max_cpu_address(np);
	unittest(cpu_addr == 0x4fffffff,
		 "of_dma_get_max_cpu_address: wrong CPU addr %pad (expecting %x)\n",
		 &cpu_addr, 0x4fffffff);
}

static void __init of_unittest_dma_ranges_one(const char *path,
		u64 expect_dma_addr, u64 expect_paddr)
{
#ifdef CONFIG_HAS_DMA
	struct device_node *np;
	const struct bus_dma_region *map = NULL;
	int rc;

	np = of_find_node_by_path(path);
	if (!np) {
		pr_err("missing testcase data\n");
		return;
	}

	rc = of_dma_get_range(np, &map);

	unittest(!rc, "of_dma_get_range failed on node %pOF rc=%i\n", np, rc);

	if (!rc) {
		phys_addr_t	paddr;
		dma_addr_t	dma_addr;
		struct device	*dev_bogus;

		dev_bogus = kzalloc(sizeof(struct device), GFP_KERNEL);
		if (!dev_bogus) {
			unittest(0, "kzalloc() failed\n");
			kfree(map);
			return;
		}

		dev_bogus->dma_range_map = map;
		paddr = dma_to_phys(dev_bogus, expect_dma_addr);
		dma_addr = phys_to_dma(dev_bogus, expect_paddr);

		unittest(paddr == expect_paddr,
			 "of_dma_get_range: wrong phys addr %pap (expecting %llx) on node %pOF\n",
			 &paddr, expect_paddr, np);
		unittest(dma_addr == expect_dma_addr,
			 "of_dma_get_range: wrong DMA addr %pad (expecting %llx) on node %pOF\n",
			 &dma_addr, expect_dma_addr, np);

		kfree(map);
		kfree(dev_bogus);
	}
	of_node_put(np);
#endif
}

static void __init of_unittest_parse_dma_ranges(void)
{
	of_unittest_dma_ranges_one("/testcase-data/address-tests/device@70000000",
		0x0, 0x20000000);
	if (IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT))
		of_unittest_dma_ranges_one("/testcase-data/address-tests/bus@80000000/device@1000",
			0x100000000, 0x20000000);
	of_unittest_dma_ranges_one("/testcase-data/address-tests/pci@90000000",
		0x80000000, 0x20000000);
}

static void __init of_unittest_pci_dma_ranges(void)
{
	struct device_node *np;
	struct of_pci_range range;
	struct of_pci_range_parser parser;
	int i = 0;

	if (!IS_ENABLED(CONFIG_PCI))
		return;

	np = of_find_node_by_path("/testcase-data/address-tests/pci@90000000");
	if (!np) {
		pr_err("missing testcase data\n");
		return;
	}

	if (of_pci_dma_range_parser_init(&parser, np)) {
		pr_err("missing dma-ranges property\n");
		return;
	}

	/*
	 * Get the dma-ranges from the device tree
	 */
	for_each_of_pci_range(&parser, &range) {
		if (!i) {
			unittest(range.size == 0x10000000,
				 "for_each_of_pci_range wrong size on node %pOF size=%llx\n",
				 np, range.size);
			unittest(range.cpu_addr == 0x20000000,
				 "for_each_of_pci_range wrong CPU addr (%llx) on node %pOF",
				 range.cpu_addr, np);
			unittest(range.pci_addr == 0x80000000,
				 "for_each_of_pci_range wrong DMA addr (%llx) on node %pOF",
				 range.pci_addr, np);
		} else {
			unittest(range.size == 0x10000000,
				 "for_each_of_pci_range wrong size on node %pOF size=%llx\n",
				 np, range.size);
			unittest(range.cpu_addr == 0x40000000,
				 "for_each_of_pci_range wrong CPU addr (%llx) on node %pOF",
				 range.cpu_addr, np);
			unittest(range.pci_addr == 0xc0000000,
				 "for_each_of_pci_range wrong DMA addr (%llx) on node %pOF",
				 range.pci_addr, np);
		}
		i++;
	}

	of_node_put(np);
}

static void __init of_unittest_bus_ranges(void)
{
	struct device_node *np;
	struct of_range range;
	struct of_range_parser parser;
	struct resource res;
	int ret, count, i = 0;

	np = of_find_node_by_path("/testcase-data/address-tests");
	if (!np) {
		pr_err("missing testcase data\n");
		return;
	}

	if (of_range_parser_init(&parser, np)) {
		pr_err("missing ranges property\n");
		return;
	}

	ret = of_range_to_resource(np, 1, &res);
	unittest(!ret, "of_range_to_resource returned error (%d) node %pOF\n",
		ret, np);
	unittest(resource_type(&res) == IORESOURCE_MEM,
		"of_range_to_resource wrong resource type on node %pOF res=%pR\n",
		np, &res);
	unittest(res.start == 0xd0000000,
		"of_range_to_resource wrong resource start address on node %pOF res=%pR\n",
		np, &res);
	unittest(resource_size(&res) == 0x20000000,
		"of_range_to_resource wrong resource start address on node %pOF res=%pR\n",
		np, &res);

	count = of_range_count(&parser);
	unittest(count == 2,
		"of_range_count wrong size on node %pOF count=%d\n",
		np, count);

	/*
	 * Get the "ranges" from the device tree
	 */
	for_each_of_range(&parser, &range) {
		unittest(range.flags == IORESOURCE_MEM,
			"for_each_of_range wrong flags on node %pOF flags=%x (expected %x)\n",
			np, range.flags, IORESOURCE_MEM);
		if (!i) {
			unittest(range.size == 0x50000000,
				 "for_each_of_range wrong size on node %pOF size=%llx\n",
				 np, range.size);
			unittest(range.cpu_addr == 0x70000000,
				 "for_each_of_range wrong CPU addr (%llx) on node %pOF",
				 range.cpu_addr, np);
			unittest(range.bus_addr == 0x70000000,
				 "for_each_of_range wrong bus addr (%llx) on node %pOF",
				 range.pci_addr, np);
		} else {
			unittest(range.size == 0x20000000,
				 "for_each_of_range wrong size on node %pOF size=%llx\n",
				 np, range.size);
			unittest(range.cpu_addr == 0xd0000000,
				 "for_each_of_range wrong CPU addr (%llx) on node %pOF",
				 range.cpu_addr, np);
			unittest(range.bus_addr == 0x00000000,
				 "for_each_of_range wrong bus addr (%llx) on node %pOF",
				 range.pci_addr, np);
		}
		i++;
	}

	of_node_put(np);
}

static void __init of_unittest_bus_3cell_ranges(void)
{
	struct device_node *np;
	struct of_range range;
	struct of_range_parser parser;
	int i = 0;

	np = of_find_node_by_path("/testcase-data/address-tests/bus@a0000000");
	if (!np) {
		pr_err("missing testcase data\n");
		return;
	}

	if (of_range_parser_init(&parser, np)) {
		pr_err("missing ranges property\n");
		return;
	}

	/*
	 * Get the "ranges" from the device tree
	 */
	for_each_of_range(&parser, &range) {
		if (!i) {
			unittest(range.flags == 0xf00baa,
				 "for_each_of_range wrong flags on node %pOF flags=%x\n",
				 np, range.flags);
			unittest(range.size == 0x100000,
				 "for_each_of_range wrong size on node %pOF size=%llx\n",
				 np, range.size);
			unittest(range.cpu_addr == 0xa0000000,
				 "for_each_of_range wrong CPU addr (%llx) on node %pOF",
				 range.cpu_addr, np);
			unittest(range.bus_addr == 0x0,
				 "for_each_of_range wrong bus addr (%llx) on node %pOF",
				 range.pci_addr, np);
		} else {
			unittest(range.flags == 0xf00bee,
				 "for_each_of_range wrong flags on node %pOF flags=%x\n",
				 np, range.flags);
			unittest(range.size == 0x200000,
				 "for_each_of_range wrong size on node %pOF size=%llx\n",
				 np, range.size);
			unittest(range.cpu_addr == 0xb0000000,
				 "for_each_of_range wrong CPU addr (%llx) on node %pOF",
				 range.cpu_addr, np);
			unittest(range.bus_addr == 0x100000000,
				 "for_each_of_range wrong bus addr (%llx) on node %pOF",
				 range.pci_addr, np);
		}
		i++;
	}

	of_node_put(np);
}

static void __init of_unittest_reg(void)
{
	struct device_node *np;
	int ret;
	u64 addr, size;

	np = of_find_node_by_path("/testcase-data/address-tests/bus@80000000/device@1000");
	if (!np) {
		pr_err("missing testcase data\n");
		return;
	}

	ret = of_property_read_reg(np, 0, &addr, &size);
	unittest(!ret, "of_property_read_reg(%pOF) returned error %d\n",
		np, ret);
	unittest(addr == 0x1000, "of_property_read_reg(%pOF) untranslated address (%llx) incorrect\n",
		np, addr);

	of_node_put(np);
}

static void __init of_unittest_parse_interrupts(void)
{
	struct device_node *np;
	struct of_phandle_args args;
	int i, rc;

	if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)
		return;

	np = of_find_node_by_path("/testcase-data/interrupts/interrupts0");
	if (!np) {
		pr_err("missing testcase data\n");
		return;
	}

	for (i = 0; i < 4; i++) {
		bool passed = true;

		memset(&args, 0, sizeof(args));
		rc = of_irq_parse_one(np, i, &args);

		passed &= !rc;
		passed &= (args.args_count == 1);
		passed &= (args.args[0] == (i + 1));

		unittest(passed, "index %i - data error on node %pOF rc=%i\n",
			 i, args.np, rc);
	}
	of_node_put(np);

	np = of_find_node_by_path("/testcase-data/interrupts/interrupts1");
	if (!np) {
		pr_err("missing testcase data\n");
		return;
	}

	for (i = 0; i < 4; i++) {
		bool passed = true;

		memset(&args, 0, sizeof(args));
		rc = of_irq_parse_one(np, i, &args);

		/* Test the values from tests-phandle.dtsi */
		switch (i) {
		case 0:
			passed &= !rc;
			passed &= (args.args_count == 1);
			passed &= (args.args[0] == 9);
			break;
		case 1:
			passed &= !rc;
			passed &= (args.args_count == 3);
			passed &= (args.args[0] == 10);
			passed &= (args.args[1] == 11);
			passed &= (args.args[2] == 12);
			break;
		case 2:
			passed &= !rc;
			passed &= (args.args_count == 2);
			passed &= (args.args[0] == 13);
			passed &= (args.args[1] == 14);
			break;
		case 3:
			passed &= !rc;
			passed &= (args.args_count == 2);
			passed &= (args.args[0] == 15);
			passed &= (args.args[1] == 16);
			break;
		default:
			passed = false;
		}
		unittest(passed, "index %i - data error on node %pOF rc=%i\n",
			 i, args.np, rc);
	}
	of_node_put(np);
}

static void __init of_unittest_parse_interrupts_extended(void)
{
	struct device_node *np;
	struct of_phandle_args args;
	int i, rc;

	if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)
		return;

	np = of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0");
	if (!np) {
		pr_err("missing testcase data\n");
		return;
	}

	for (i = 0; i < 7; i++) {
		bool passed = true;

		memset(&args, 0, sizeof(args));
		rc = of_irq_parse_one(np, i, &args);

		/* Test the values from tests-phandle.dtsi */
		switch (i) {
		case 0:
			passed &= !rc;
			passed &= (args.args_count == 1);
			passed &= (args.args[0] == 1);
			break;
		case 1:
			passed &= !rc;
			passed &= (args.args_count == 3);
			passed &= (args.args[0] == 2);
			passed &= (args.args[1] == 3);
			passed &= (args.args[2] == 4);
			break;
		case 2:
			passed &= !rc;
			passed &= (args.args_count == 2);
			passed &= (args.args[0] == 5);
			passed &= (args.args[1] == 6);
			break;
		case 3:
			passed &= !rc;
			passed &= (args.args_count == 1);
			passed &= (args.args[0] == 9);
			break;
		case 4:
			passed &= !rc;
			passed &= (args.args_count == 3);
			passed &= (args.args[0] == 10);
			passed &= (args.args[1] == 11);
			passed &= (args.args[2] == 12);
			break;
		case 5:
			passed &= !rc;
			passed &= (args.args_count == 2);
			passed &= (args.args[0] == 13);
			passed &= (args.args[1] == 14);
			break;
		case 6:
			/*
			 * Tests child node that is missing property
			 * #address-cells.  See the comments in
			 * drivers/of/unittest-data/tests-interrupts.dtsi
			 * nodes intmap1 and interrupts-extended0
			 */
			passed &= !rc;
			passed &= (args.args_count == 1);
			passed &= (args.args[0] == 15);
			break;
		default:
			passed = false;
		}

		unittest(passed, "index %i - data error on node %pOF rc=%i\n",
			 i, args.np, rc);
	}
	of_node_put(np);
}

static const struct of_device_id match_node_table[] = {
	{ .data = "A", .name = "name0", }, /* Name alone is lowest priority */
	{ .data = "B", .type = "type1", }, /* followed by type alone */

	{ .data = "Ca", .name = "name2", .type = "type1", }, /* followed by both together */
	{ .data = "Cb", .name = "name2", }, /* Only match when type doesn't match */
	{ .data = "Cc", .name = "name2", .type = "type2", },

	{ .data = "E", .compatible = "compat3" },
	{ .data = "G", .compatible = "compat2", },
	{ .data = "H", .compatible = "compat2", .name = "name5", },
	{ .data = "I", .compatible = "compat2", .type = "type1", },
	{ .data = "J", .compatible = "compat2", .type = "type1", .name = "name8", },
	{ .data = "K", .compatible = "compat2", .name = "name9", },
	{}
};

static struct {
	const char *path;
	const char *data;
} match_node_tests[] = {
	{ .path = "/testcase-data/match-node/name0", .data = "A", },
	{ .path = "/testcase-data/match-node/name1", .data = "B", },
	{ .path = "/testcase-data/match-node/a/name2", .data = "Ca", },
	{ .path = "/testcase-data/match-node/b/name2", .data = "Cb", },
	{ .path = "/testcase-data/match-node/c/name2", .data = "Cc", },
	{ .path = "/testcase-data/match-node/name3", .data = "E", },
	{ .path = "/testcase-data/match-node/name4", .data = "G", },
	{ .path = "/testcase-data/match-node/name5", .data = "H", },
	{ .path = "/testcase-data/match-node/name6", .data = "G", },
	{ .path = "/testcase-data/match-node/name7", .data = "I", },
	{ .path = "/testcase-data/match-node/name8", .data = "J", },
	{ .path = "/testcase-data/match-node/name9", .data = "K", },
};

static void __init of_unittest_match_node(void)
{
	struct device_node *np;
	const struct of_device_id *match;
	int i;

	for (i = 0; i < ARRAY_SIZE(match_node_tests); i++) {
		np = of_find_node_by_path(match_node_tests[i].path);
		if (!np) {
			unittest(0, "missing testcase node %s\n",
				match_node_tests[i].path);
			continue;
		}

		match = of_match_node(match_node_table, np);
		if (!match) {
			unittest(0, "%s didn't match anything\n",
				match_node_tests[i].path);
			continue;
		}

		if (strcmp(match->data, match_node_tests[i].data) != 0) {
			unittest(0, "%s got wrong match. expected %s, got %s\n",
				match_node_tests[i].path, match_node_tests[i].data,
				(const char *)match->data);
			continue;
		}
		unittest(1, "passed");
	}
}

static struct resource test_bus_res = DEFINE_RES_MEM(0xfffffff8, 2);
static const struct platform_device_info test_bus_info = {
	.name = "unittest-bus",
};
static void __init of_unittest_platform_populate(void)
{
	int irq, rc;
	struct device_node *np, *child, *grandchild;
	struct platform_device *pdev, *test_bus;
	const struct of_device_id match[] = {
		{ .compatible = "test-device", },
		{}
	};

	np = of_find_node_by_path("/testcase-data");
	of_platform_default_populate(np, NULL, NULL);

	/* Test that a missing irq domain returns -EPROBE_DEFER */
	np = of_find_node_by_path("/testcase-data/testcase-device1");
	pdev = of_find_device_by_node(np);
	unittest(pdev, "device 1 creation failed\n");

	if (!(of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)) {
		irq = platform_get_irq(pdev, 0);
		unittest(irq == -EPROBE_DEFER,
			 "device deferred probe failed - %d\n", irq);

		/* Test that a parsing failure does not return -EPROBE_DEFER */
		np = of_find_node_by_path("/testcase-data/testcase-device2");
		pdev = of_find_device_by_node(np);
		unittest(pdev, "device 2 creation failed\n");

		EXPECT_BEGIN(KERN_INFO,
			     "platform testcase-data:testcase-device2: error -ENXIO: IRQ index 0 not found");

		irq = platform_get_irq(pdev, 0);

		EXPECT_END(KERN_INFO,
			   "platform testcase-data:testcase-device2: error -ENXIO: IRQ index 0 not found");

		unittest(irq < 0 && irq != -EPROBE_DEFER,
			 "device parsing error failed - %d\n", irq);
	}

	np = of_find_node_by_path("/testcase-data/platform-tests");
	unittest(np, "No testcase data in device tree\n");
	if (!np)
		return;

	test_bus = platform_device_register_full(&test_bus_info);
	rc = PTR_ERR_OR_ZERO(test_bus);
	unittest(!rc, "testbus registration failed; rc=%i\n", rc);
	if (rc) {
		of_node_put(np);
		return;
	}
	test_bus->dev.of_node = np;

	/*
	 * Add a dummy resource to the test bus node after it is
	 * registered to catch problems with un-inserted resources. The
	 * DT code doesn't insert the resources, and it has caused the
	 * kernel to oops in the past. This makes sure the same bug
	 * doesn't crop up again.
	 */
	platform_device_add_resources(test_bus, &test_bus_res, 1);

	of_platform_populate(np, match, NULL, &test_bus->dev);
	for_each_child_of_node(np, child) {
		for_each_child_of_node(child, grandchild) {
			pdev = of_find_device_by_node(grandchild);
			unittest(pdev,
				 "Could not create device for node '%pOFn'\n",
				 grandchild);
			platform_device_put(pdev);
		}
	}

	of_platform_depopulate(&test_bus->dev);
	for_each_child_of_node(np, child) {
		for_each_child_of_node(child, grandchild)
			unittest(!of_find_device_by_node(grandchild),
				 "device didn't get destroyed '%pOFn'\n",
				 grandchild);
	}

	platform_device_unregister(test_bus);
	of_node_put(np);
}

/**
 *	update_node_properties - adds the properties
 *	of np into dup node (present in live tree) and
 *	updates parent of children of np to dup.
 *
 *	@np:	node whose properties are being added to the live tree
 *	@dup:	node present in live tree to be updated
 */
static void update_node_properties(struct device_node *np,
					struct device_node *dup)
{
	struct property *prop;
	struct property *save_next;
	struct device_node *child;
	int ret;

	for_each_child_of_node(np, child)
		child->parent = dup;

	/*
	 * "unittest internal error: unable to add testdata property"
	 *
	 *    If this message reports a property in node '/__symbols__' then
	 *    the respective unittest overlay contains a label that has the
	 *    same name as a label in the live devicetree.  The label will
	 *    be in the live devicetree only if the devicetree source was
	 *    compiled with the '-@' option.  If you encounter this error,
	 *    please consider renaming __all__ of the labels in the unittest
	 *    overlay dts files with an odd prefix that is unlikely to be
	 *    used in a real devicetree.
	 */

	/*
	 * open code for_each_property_of_node() because of_add_property()
	 * sets prop->next to NULL
	 */
	for (prop = np->properties; prop != NULL; prop = save_next) {
		save_next = prop->next;
		ret = of_add_property(dup, prop);
		if (ret) {
			if (ret == -EEXIST && !strcmp(prop->name, "name"))
				continue;
			pr_err("unittest internal error: unable to add testdata property %pOF/%s",
			       np, prop->name);
		}
	}
}

/**
 *	attach_node_and_children - attaches nodes
 *	and its children to live tree.
 *	CAUTION: misleading function name - if node @np already exists in
 *	the live tree then children of @np are *not* attached to the live
 *	tree.  This works for the current test devicetree nodes because such
 *	nodes do not have child nodes.
 *
 *	@np:	Node to attach to live tree
 */
static void attach_node_and_children(struct device_node *np)
{
	struct device_node *next, *dup, *child;
	unsigned long flags;
	const char *full_name;

	full_name = kasprintf(GFP_KERNEL, "%pOF", np);
	if (!full_name)
		return;

	if (!strcmp(full_name, "/__local_fixups__") ||
	    !strcmp(full_name, "/__fixups__")) {
		kfree(full_name);
		return;
	}

	dup = of_find_node_by_path(full_name);
	kfree(full_name);
	if (dup) {
		update_node_properties(np, dup);
		return;
	}

	child = np->child;
	np->child = NULL;

	mutex_lock(&of_mutex);
	raw_spin_lock_irqsave(&devtree_lock, flags);
	np->sibling = np->parent->child;
	np->parent->child = np;
	of_node_clear_flag(np, OF_DETACHED);
	raw_spin_unlock_irqrestore(&devtree_lock, flags);

	__of_attach_node_sysfs(np);
	mutex_unlock(&of_mutex);

	while (child) {
		next = child->sibling;
		attach_node_and_children(child);
		child = next;
	}
}

/**
 *	unittest_data_add - Reads, copies data from
 *	linked tree and attaches it to the live tree
 */
static int __init unittest_data_add(void)
{
	void *unittest_data;
	void *unittest_data_align;
	struct device_node *unittest_data_node = NULL, *np;
	/*
	 * __dtbo_testcases_begin[] and __dtbo_testcases_end[] are magically
	 * created by cmd_dt_S_dtbo in scripts/Makefile.lib
	 */
	extern uint8_t __dtbo_testcases_begin[];
	extern uint8_t __dtbo_testcases_end[];
	const int size = __dtbo_testcases_end - __dtbo_testcases_begin;
	int rc;
	void *ret;

	if (!size) {
		pr_warn("%s: testcases is empty\n", __func__);
		return -ENODATA;
	}

	/* creating copy */
	unittest_data = kmalloc(size + FDT_ALIGN_SIZE, GFP_KERNEL);
	if (!unittest_data)
		return -ENOMEM;

	unittest_data_align = PTR_ALIGN(unittest_data, FDT_ALIGN_SIZE);
	memcpy(unittest_data_align, __dtbo_testcases_begin, size);

	ret = of_fdt_unflatten_tree(unittest_data_align, NULL, &unittest_data_node);
	if (!ret) {
		pr_warn("%s: unflatten testcases tree failed\n", __func__);
		kfree(unittest_data);
		return -ENODATA;
	}
	if (!unittest_data_node) {
		pr_warn("%s: testcases tree is empty\n", __func__);
		kfree(unittest_data);
		return -ENODATA;
	}

	/*
	 * This lock normally encloses of_resolve_phandles()
	 */
	of_overlay_mutex_lock();

	rc = of_resolve_phandles(unittest_data_node);
	if (rc) {
		pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__, rc);
		of_overlay_mutex_unlock();
		return -EINVAL;
	}

	if (!of_root) {
		of_root = unittest_data_node;
		for_each_of_allnodes(np)
			__of_attach_node_sysfs(np);
		of_aliases = of_find_node_by_path("/aliases");
		of_chosen = of_find_node_by_path("/chosen");
		of_overlay_mutex_unlock();
		return 0;
	}

	EXPECT_BEGIN(KERN_INFO,
		     "Duplicate name in testcase-data, renamed to \"duplicate-name#1\"");

	/* attach the sub-tree to live tree */
	np = unittest_data_node->child;
	while (np) {
		struct device_node *next = np->sibling;

		np->parent = of_root;
		/* this will clear OF_DETACHED in np and children */
		attach_node_and_children(np);
		np = next;
	}

	EXPECT_END(KERN_INFO,
		   "Duplicate name in testcase-data, renamed to \"duplicate-name#1\"");

	of_overlay_mutex_unlock();

	return 0;
}

#ifdef CONFIG_OF_OVERLAY
static int __init overlay_data_apply(const char *overlay_name, int *ovcs_id);

static int unittest_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct device_node *np = dev->of_node;

	if (np == NULL) {
		dev_err(dev, "No OF data for device\n");
		return -EINVAL;

	}

	dev_dbg(dev, "%s for node @%pOF\n", __func__, np);

	of_platform_populate(np, NULL, NULL, &pdev->dev);

	return 0;
}

static void unittest_remove(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct device_node *np = dev->of_node;

	dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
}

static const struct of_device_id unittest_match[] = {
	{ .compatible = "unittest", },
	{},
};

static struct platform_driver unittest_driver = {
	.probe			= unittest_probe,
	.remove_new		= unittest_remove,
	.driver = {
		.name		= "unittest",
		.of_match_table	= of_match_ptr(unittest_match),
	},
};

/* get the platform device instantiated at the path */
static struct platform_device *of_path_to_platform_device(const char *path)
{
	struct device_node *np;
	struct platform_device *pdev;

	np = of_find_node_by_path(path);
	if (np == NULL)
		return NULL;

	pdev = of_find_device_by_node(np);
	of_node_put(np);

	return pdev;
}

/* find out if a platform device exists at that path */
static int of_path_platform_device_exists(const char *path)
{
	struct platform_device *pdev;

	pdev = of_path_to_platform_device(path);
	platform_device_put(pdev);
	return pdev != NULL;
}

#ifdef CONFIG_OF_GPIO

struct unittest_gpio_dev {
	struct gpio_chip chip;
};

static int unittest_gpio_chip_request_count;
static int unittest_gpio_probe_count;
static int unittest_gpio_probe_pass_count;

static int unittest_gpio_chip_request(struct gpio_chip *chip, unsigned int offset)
{
	unittest_gpio_chip_request_count++;

	pr_debug("%s(): %s %d %d\n", __func__, chip->label, offset,
		 unittest_gpio_chip_request_count);
	return 0;
}

static int unittest_gpio_probe(struct platform_device *pdev)
{
	struct unittest_gpio_dev *devptr;
	int ret;

	unittest_gpio_probe_count++;

	devptr = kzalloc(sizeof(*devptr), GFP_KERNEL);
	if (!devptr)
		return -ENOMEM;

	platform_set_drvdata(pdev, devptr);

	devptr->chip.fwnode = dev_fwnode(&pdev->dev);
	devptr->chip.label = "of-unittest-gpio";
	devptr->chip.base = -1; /* dynamic allocation */
	devptr->chip.ngpio = 5;
	devptr->chip.request = unittest_gpio_chip_request;

	ret = gpiochip_add_data(&devptr->chip, NULL);

	unittest(!ret,
		 "gpiochip_add_data() for node @%pfw failed, ret = %d\n", devptr->chip.fwnode, ret);

	if (!ret)
		unittest_gpio_probe_pass_count++;
	return ret;
}

static void unittest_gpio_remove(struct platform_device *pdev)
{
	struct unittest_gpio_dev *devptr = platform_get_drvdata(pdev);
	struct device *dev = &pdev->dev;

	dev_dbg(dev, "%s for node @%pfw\n", __func__, devptr->chip.fwnode);

	if (devptr->chip.base != -1)
		gpiochip_remove(&devptr->chip);

	kfree(devptr);
}

static const struct of_device_id unittest_gpio_id[] = {
	{ .compatible = "unittest-gpio", },
	{}
};

static struct platform_driver unittest_gpio_driver = {
	.probe	= unittest_gpio_probe,
	.remove_new = unittest_gpio_remove,
	.driver	= {
		.name		= "unittest-gpio",
		.of_match_table	= of_match_ptr(unittest_gpio_id),
	},
};

static void __init of_unittest_overlay_gpio(void)
{
	int chip_request_count;
	int probe_pass_count;
	int ret;

	/*
	 * tests: apply overlays before registering driver
	 * Similar to installing a driver as a module, the
	 * driver is registered after applying the overlays.
	 *
	 * The overlays are applied by overlay_data_apply()
	 * instead of of_unittest_apply_overlay() so that they
	 * will not be tracked.  Thus they will not be removed
	 * by of_unittest_remove_tracked_overlays().
	 *
	 * - apply overlay_gpio_01
	 * - apply overlay_gpio_02a
	 * - apply overlay_gpio_02b
	 * - register driver
	 *
	 * register driver will result in
	 *   - probe and processing gpio hog for overlay_gpio_01
	 *   - probe for overlay_gpio_02a
	 *   - processing gpio for overlay_gpio_02b
	 */

	probe_pass_count = unittest_gpio_probe_pass_count;
	chip_request_count = unittest_gpio_chip_request_count;

	/*
	 * overlay_gpio_01 contains gpio node and child gpio hog node
	 * overlay_gpio_02a contains gpio node
	 * overlay_gpio_02b contains child gpio hog node
	 */

	unittest(overlay_data_apply("overlay_gpio_01", NULL),
		 "Adding overlay 'overlay_gpio_01' failed\n");

	unittest(overlay_data_apply("overlay_gpio_02a", NULL),
		 "Adding overlay 'overlay_gpio_02a' failed\n");

	unittest(overlay_data_apply("overlay_gpio_02b", NULL),
		 "Adding overlay 'overlay_gpio_02b' failed\n");

	ret = platform_driver_register(&unittest_gpio_driver);
	if (unittest(ret == 0, "could not register unittest gpio driver\n"))
		return;

	unittest(probe_pass_count + 2 == unittest_gpio_probe_pass_count,
		 "unittest_gpio_probe() failed or not called\n");

	unittest(chip_request_count + 2 == unittest_gpio_chip_request_count,
		 "unittest_gpio_chip_request() called %d times (expected 1 time)\n",
		 unittest_gpio_chip_request_count - chip_request_count);

	/*
	 * tests: apply overlays after registering driver
	 *
	 * Similar to a driver built-in to the kernel, the
	 * driver is registered before applying the overlays.
	 *
	 * overlay_gpio_03 contains gpio node and child gpio hog node
	 *
	 * - apply overlay_gpio_03
	 *
	 * apply overlay will result in
	 *   - probe and processing gpio hog.
	 */

	probe_pass_count = unittest_gpio_probe_pass_count;
	chip_request_count = unittest_gpio_chip_request_count;

	/* overlay_gpio_03 contains gpio node and child gpio hog node */

	unittest(overlay_data_apply("overlay_gpio_03", NULL),
		 "Adding overlay 'overlay_gpio_03' failed\n");

	unittest(probe_pass_count + 1 == unittest_gpio_probe_pass_count,
		 "unittest_gpio_probe() failed or not called\n");

	unittest(chip_request_count + 1 == unittest_gpio_chip_request_count,
		 "unittest_gpio_chip_request() called %d times (expected 1 time)\n",
		 unittest_gpio_chip_request_count - chip_request_count);

	/*
	 * overlay_gpio_04a contains gpio node
	 *
	 * - apply overlay_gpio_04a
	 *
	 * apply the overlay will result in
	 *   - probe for overlay_gpio_04a
	 */

	probe_pass_count = unittest_gpio_probe_pass_count;
	chip_request_count = unittest_gpio_chip_request_count;

	/* overlay_gpio_04a contains gpio node */

	unittest(overlay_data_apply("overlay_gpio_04a", NULL),
		 "Adding overlay 'overlay_gpio_04a' failed\n");

	unittest(probe_pass_count + 1 == unittest_gpio_probe_pass_count,
		 "unittest_gpio_probe() failed or not called\n");

	/*
	 * overlay_gpio_04b contains child gpio hog node
	 *
	 * - apply overlay_gpio_04b
	 *
	 * apply the overlay will result in
	 *   - processing gpio for overlay_gpio_04b
	 */

	/* overlay_gpio_04b contains child gpio hog node */

	unittest(overlay_data_apply("overlay_gpio_04b", NULL),
		 "Adding overlay 'overlay_gpio_04b' failed\n");

	unittest(chip_request_count + 1 == unittest_gpio_chip_request_count,
		 "unittest_gpio_chip_request() called %d times (expected 1 time)\n",
		 unittest_gpio_chip_request_count - chip_request_count);
}

#else

static void __init of_unittest_overlay_gpio(void)
{
	/* skip tests */
}

#endif

#if IS_BUILTIN(CONFIG_I2C)

/* get the i2c client device instantiated at the path */
static struct i2c_client *of_path_to_i2c_client(const char *path)
{
	struct device_node *np;
	struct i2c_client *client;

	np = of_find_node_by_path(path);
	if (np == NULL)
		return NULL;

	client = of_find_i2c_device_by_node(np);
	of_node_put(np);

	return client;
}

/* find out if a i2c client device exists at that path */
static int of_path_i2c_client_exists(const char *path)
{
	struct i2c_client *client;

	client = of_path_to_i2c_client(path);
	if (client)
		put_device(&client->dev);
	return client != NULL;
}
#else
static int of_path_i2c_client_exists(const char *path)
{
	return 0;
}
#endif

enum overlay_type {
	PDEV_OVERLAY,
	I2C_OVERLAY
};

static int of_path_device_type_exists(const char *path,
		enum overlay_type ovtype)
{
	switch (ovtype) {
	case PDEV_OVERLAY:
		return of_path_platform_device_exists(path);
	case I2C_OVERLAY:
		return of_path_i2c_client_exists(path);
	}
	return 0;
}

static const char *unittest_path(int nr, enum overlay_type ovtype)
{
	const char *base;
	static char buf[256];

	switch (ovtype) {
	case PDEV_OVERLAY:
		base = "/testcase-data/overlay-node/test-bus";
		break;
	case I2C_OVERLAY:
		base = "/testcase-data/overlay-node/test-bus/i2c-test-bus";
		break;
	default:
		buf[0] = '\0';
		return buf;
	}
	snprintf(buf, sizeof(buf) - 1, "%s/test-unittest%d", base, nr);
	buf[sizeof(buf) - 1] = '\0';
	return buf;
}

static int of_unittest_device_exists(int unittest_nr, enum overlay_type ovtype)
{
	const char *path;

	path = unittest_path(unittest_nr, ovtype);

	switch (ovtype) {
	case PDEV_OVERLAY:
		return of_path_platform_device_exists(path);
	case I2C_OVERLAY:
		return of_path_i2c_client_exists(path);
	}
	return 0;
}

static const char *overlay_name_from_nr(int nr)
{
	static char buf[256];

	snprintf(buf, sizeof(buf) - 1,
		"overlay_%d", nr);
	buf[sizeof(buf) - 1] = '\0';

	return buf;
}

static const char *bus_path = "/testcase-data/overlay-node/test-bus";

#define MAX_TRACK_OVCS_IDS 256

static int track_ovcs_id[MAX_TRACK_OVCS_IDS];
static int track_ovcs_id_overlay_nr[MAX_TRACK_OVCS_IDS];
static int track_ovcs_id_cnt;

static void of_unittest_track_overlay(int ovcs_id, int overlay_nr)
{
	if (WARN_ON(track_ovcs_id_cnt >= MAX_TRACK_OVCS_IDS))
		return;

	track_ovcs_id[track_ovcs_id_cnt] = ovcs_id;
	track_ovcs_id_overlay_nr[track_ovcs_id_cnt] = overlay_nr;
	track_ovcs_id_cnt++;
}

static void of_unittest_untrack_overlay(int ovcs_id)
{
	if (WARN_ON(track_ovcs_id_cnt < 1))
		return;

	track_ovcs_id_cnt--;

	/* If out of synch then test is broken.  Do not try to recover. */
	WARN_ON(track_ovcs_id[track_ovcs_id_cnt] != ovcs_id);
}

static void of_unittest_remove_tracked_overlays(void)
{
	int ret, ovcs_id, overlay_nr, save_ovcs_id;
	const char *overlay_name;

	while (track_ovcs_id_cnt > 0) {

		ovcs_id = track_ovcs_id[track_ovcs_id_cnt - 1];
		overlay_nr = track_ovcs_id_overlay_nr[track_ovcs_id_cnt - 1];
		save_ovcs_id = ovcs_id;
		ret = of_overlay_remove(&ovcs_id);
		if (ret == -ENODEV) {
			overlay_name = overlay_name_from_nr(overlay_nr);
			pr_warn("%s: of_overlay_remove() for overlay \"%s\" failed, ret = %d\n",
				__func__, overlay_name, ret);
		}
		of_unittest_untrack_overlay(save_ovcs_id);
	}

}

static int __init of_unittest_apply_overlay(int overlay_nr, int *ovcs_id)
{
	/*
	 * The overlay will be tracked, thus it will be removed
	 * by of_unittest_remove_tracked_overlays().
	 */

	const char *overlay_name;

	overlay_name = overlay_name_from_nr(overlay_nr);

	if (!overlay_data_apply(overlay_name, ovcs_id)) {
		unittest(0, "could not apply overlay \"%s\"\n", overlay_name);
		return -EFAULT;
	}
	of_unittest_track_overlay(*ovcs_id, overlay_nr);

	return 0;
}

/* apply an overlay while checking before and after states */
static int __init of_unittest_apply_overlay_check(int overlay_nr,
		int unittest_nr, int before, int after,
		enum overlay_type ovtype)
{
	int ret, ovcs_id;

	/* unittest device must not be in before state */
	if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
		unittest(0, "%s with device @\"%s\" %s\n",
				overlay_name_from_nr(overlay_nr),
				unittest_path(unittest_nr, ovtype),
				!before ? "enabled" : "disabled");
		return -EINVAL;
	}

	ovcs_id = 0;
	ret = of_unittest_apply_overlay(overlay_nr, &ovcs_id);
	if (ret != 0) {
		/* of_unittest_apply_overlay already called unittest() */
		return ret;
	}

	/* unittest device must be to set to after state */
	if (of_unittest_device_exists(unittest_nr, ovtype) != after) {
		unittest(0, "%s failed to create @\"%s\" %s\n",
				overlay_name_from_nr(overlay_nr),
				unittest_path(unittest_nr, ovtype),
				!after ? "enabled" : "disabled");
		return -EINVAL;
	}

	return 0;
}

/* apply an overlay and then revert it while checking before, after states */
static int __init of_unittest_apply_revert_overlay_check(int overlay_nr,
		int unittest_nr, int before, int after,
		enum overlay_type ovtype)
{
	int ret, ovcs_id, save_ovcs_id;

	/* unittest device must be in before state */
	if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
		unittest(0, "%s with device @\"%s\" %s\n",
				overlay_name_from_nr(overlay_nr),
				unittest_path(unittest_nr, ovtype),
				!before ? "enabled" : "disabled");
		return -EINVAL;
	}

	/* apply the overlay */
	ovcs_id = 0;
	ret = of_unittest_apply_overlay(overlay_nr, &ovcs_id);
	if (ret != 0) {
		/* of_unittest_apply_overlay already called unittest() */
		return ret;
	}

	/* unittest device must be in after state */
	if (of_unittest_device_exists(unittest_nr, ovtype) != after) {
		unittest(0, "%s failed to create @\"%s\" %s\n",
				overlay_name_from_nr(overlay_nr),
				unittest_path(unittest_nr, ovtype),
				!after ? "enabled" : "disabled");
		return -EINVAL;
	}

	save_ovcs_id = ovcs_id;
	ret = of_overlay_remove(&ovcs_id);
	if (ret != 0) {
		unittest(0, "%s failed to be destroyed @\"%s\"\n",
				overlay_name_from_nr(overlay_nr),
				unittest_path(unittest_nr, ovtype));
		return ret;
	}
	of_unittest_untrack_overlay(save_ovcs_id);

	/* unittest device must be again in before state */
	if (of_unittest_device_exists(unittest_nr, PDEV_OVERLAY) != before) {
		unittest(0, "%s with device @\"%s\" %s\n",
				overlay_name_from_nr(overlay_nr),
				unittest_path(unittest_nr, ovtype),
				!before ? "enabled" : "disabled");
		return -EINVAL;
	}

	return 0;
}

/* test activation of device */
static void __init of_unittest_overlay_0(void)
{
	int ret;

	EXPECT_BEGIN(KERN_INFO,
		     "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest0/status");

	/* device should enable */
	ret = of_unittest_apply_overlay_check(0, 0, 0, 1, PDEV_OVERLAY);

	EXPECT_END(KERN_INFO,
		   "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest0/status");

	if (ret)
		return;

	unittest(1, "overlay test %d passed\n", 0);
}

/* test deactivation of device */
static void __init of_unittest_overlay_1(void)
{
	int ret;

	EXPECT_BEGIN(KERN_INFO,
		     "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest1/status");

	/* device should disable */
	ret = of_unittest_apply_overlay_check(1, 1, 1, 0, PDEV_OVERLAY);

	EXPECT_END(KERN_INFO,
		   "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest1/status");

	if (ret)
		return;

	unittest(1, "overlay test %d passed\n", 1);

}

/* test activation of device */
static void __init of_unittest_overlay_2(void)
{
	int ret;

	EXPECT_BEGIN(KERN_INFO,
		     "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest2/status");

	/* device should enable */
	ret = of_unittest_apply_overlay_check(2, 2, 0, 1, PDEV_OVERLAY);

	EXPECT_END(KERN_INFO,
		   "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest2/status");

	if (ret)
		return;
	unittest(1, "overlay test %d passed\n", 2);
}

/* test deactivation of device */
static void __init of_unittest_overlay_3(void)
{
	int ret;

	EXPECT_BEGIN(KERN_INFO,
		     "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest3/status");

	/* device should disable */
	ret = of_unittest_apply_overlay_check(3, 3, 1, 0, PDEV_OVERLAY);

	EXPECT_END(KERN_INFO,
		   "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest3/status");

	if (ret)
		return;

	unittest(1, "overlay test %d passed\n", 3);
}

/* test activation of a full device node */
static void __init of_unittest_overlay_4(void)
{
	/* device should disable */
	if (of_unittest_apply_overlay_check(4, 4, 0, 1, PDEV_OVERLAY))
		return;

	unittest(1, "overlay test %d passed\n", 4);
}

/* test overlay apply/revert sequence */
static void __init of_unittest_overlay_5(void)
{
	int ret;

	EXPECT_BEGIN(KERN_INFO,
		     "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest5/status");

	/* device should disable */
	ret = of_unittest_apply_revert_overlay_check(5, 5, 0, 1, PDEV_OVERLAY);

	EXPECT_END(KERN_INFO,
		   "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest5/status");

	if (ret)
		return;

	unittest(1, "overlay test %d passed\n", 5);
}

/* test overlay application in sequence */
static void __init of_unittest_overlay_6(void)
{
	int i, save_ovcs_id[2], ovcs_id;
	int overlay_nr = 6, unittest_nr = 6;
	int before = 0, after = 1;
	const char *overlay_name;

	int ret;

	/* unittest device must be in before state */
	for (i = 0; i < 2; i++) {
		if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
				!= before) {
			unittest(0, "%s with device @\"%s\" %s\n",
					overlay_name_from_nr(overlay_nr + i),
					unittest_path(unittest_nr + i,
						PDEV_OVERLAY),
					!before ? "enabled" : "disabled");
			return;
		}
	}

	/* apply the overlays */

	EXPECT_BEGIN(KERN_INFO,
		     "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest6/status");

	overlay_name = overlay_name_from_nr(overlay_nr + 0);

	ret = overlay_data_apply(overlay_name, &ovcs_id);

	if (!ret) {
		unittest(0, "could not apply overlay \"%s\"\n", overlay_name);
			return;
	}
	save_ovcs_id[0] = ovcs_id;
	of_unittest_track_overlay(ovcs_id, overlay_nr + 0);

	EXPECT_END(KERN_INFO,
		   "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest6/status");

	EXPECT_BEGIN(KERN_INFO,
		     "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest7/status");

	overlay_name = overlay_name_from_nr(overlay_nr + 1);

	ret = overlay_data_apply(overlay_name, &ovcs_id);

	if (!ret) {
		unittest(0, "could not apply overlay \"%s\"\n", overlay_name);
			return;
	}
	save_ovcs_id[1] = ovcs_id;
	of_unittest_track_overlay(ovcs_id, overlay_nr + 1);

	EXPECT_END(KERN_INFO,
		   "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest7/status");


	for (i = 0; i < 2; i++) {
		/* unittest device must be in after state */
		if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
				!= after) {
			unittest(0, "overlay @\"%s\" failed @\"%s\" %s\n",
					overlay_name_from_nr(overlay_nr + i),
					unittest_path(unittest_nr + i,
						PDEV_OVERLAY),
					!after ? "enabled" : "disabled");
			return;
		}
	}

	for (i = 1; i >= 0; i--) {
		ovcs_id = save_ovcs_id[i];
		if (of_overlay_remove(&ovcs_id)) {
			unittest(0, "%s failed destroy @\"%s\"\n",
					overlay_name_from_nr(overlay_nr + i),
					unittest_path(unittest_nr + i,
						PDEV_OVERLAY));
			return;
		}
		of_unittest_untrack_overlay(save_ovcs_id[i]);
	}

	for (i = 0; i < 2; i++) {
		/* unittest device must be again in before state */
		if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
				!= before) {
			unittest(0, "%s with device @\"%s\" %s\n",
					overlay_name_from_nr(overlay_nr + i),
					unittest_path(unittest_nr + i,
						PDEV_OVERLAY),
					!before ? "enabled" : "disabled");
			return;
		}
	}

	unittest(1, "overlay test %d passed\n", 6);

}

/* test overlay application in sequence */
static void __init of_unittest_overlay_8(void)
{
	int i, save_ovcs_id[2], ovcs_id;
	int overlay_nr = 8, unittest_nr = 8;
	const char *overlay_name;
	int ret;

	/* we don't care about device state in this test */

	EXPECT_BEGIN(KERN_INFO,
		     "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/status");

	overlay_name = overlay_name_from_nr(overlay_nr + 0);

	ret = overlay_data_apply(overlay_name, &ovcs_id);
	if (!ret)
		unittest(0, "could not apply overlay \"%s\"\n", overlay_name);

	EXPECT_END(KERN_INFO,
		   "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/status");

	if (!ret)
		return;

	save_ovcs_id[0] = ovcs_id;
	of_unittest_track_overlay(ovcs_id, overlay_nr + 0);

	overlay_name = overlay_name_from_nr(overlay_nr + 1);

	EXPECT_BEGIN(KERN_INFO,
		     "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/property-foo");

	/* apply the overlays */
	ret = overlay_data_apply(overlay_name, &ovcs_id);

	EXPECT_END(KERN_INFO,
		   "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/property-foo");

	if (!ret) {
		unittest(0, "could not apply overlay \"%s\"\n", overlay_name);
		return;
	}

	save_ovcs_id[1] = ovcs_id;
	of_unittest_track_overlay(ovcs_id, overlay_nr + 1);

	/* now try to remove first overlay (it should fail) */
	ovcs_id = save_ovcs_id[0];

	EXPECT_BEGIN(KERN_INFO,
		     "OF: overlay: node_overlaps_later_cs: #6 overlaps with #7 @/testcase-data/overlay-node/test-bus/test-unittest8");

	EXPECT_BEGIN(KERN_INFO,
		     "OF: overlay: overlay #6 is not topmost");

	ret = of_overlay_remove(&ovcs_id);

	EXPECT_END(KERN_INFO,
		   "OF: overlay: overlay #6 is not topmost");

	EXPECT_END(KERN_INFO,
		   "OF: overlay: node_overlaps_later_cs: #6 overlaps with #7 @/testcase-data/overlay-node/test-bus/test-unittest8");

	if (!ret) {
		/*
		 * Should never get here.  If we do, expect a lot of
		 * subsequent tracking and overlay removal related errors.
		 */
		unittest(0, "%s was destroyed @\"%s\"\n",
				overlay_name_from_nr(overlay_nr + 0),
				unittest_path(unittest_nr,
					PDEV_OVERLAY));
		return;
	}

	/* removing them in order should work */
	for (i = 1; i >= 0; i--) {
		ovcs_id = save_ovcs_id[i];
		if (of_overlay_remove(&ovcs_id)) {
			unittest(0, "%s not destroyed @\"%s\"\n",
					overlay_name_from_nr(overlay_nr + i),
					unittest_path(unittest_nr,
						PDEV_OVERLAY));
			return;
		}
		of_unittest_untrack_overlay(save_ovcs_id[i]);
	}

	unittest(1, "overlay test %d passed\n", 8);
}

/* test insertion of a bus with parent devices */
static void __init of_unittest_overlay_10(void)
{
	int ret;
	char *child_path;

	/* device should disable */
	ret = of_unittest_apply_overlay_check(10, 10, 0, 1, PDEV_OVERLAY);

	if (unittest(ret == 0,
			"overlay test %d failed; overlay application\n", 10))
		return;

	child_path = kasprintf(GFP_KERNEL, "%s/test-unittest101",
			unittest_path(10, PDEV_OVERLAY));
	if (unittest(child_path, "overlay test %d failed; kasprintf\n", 10))
		return;

	ret = of_path_device_type_exists(child_path, PDEV_OVERLAY);
	kfree(child_path);

	unittest(ret, "overlay test %d failed; no child device\n", 10);
}

/* test insertion of a bus with parent devices (and revert) */
static void __init of_unittest_overlay_11(void)
{
	int ret;

	/* device should disable */
	ret = of_unittest_apply_revert_overlay_check(11, 11, 0, 1,
			PDEV_OVERLAY);

	unittest(ret == 0, "overlay test %d failed; overlay apply\n", 11);
}

#if IS_BUILTIN(CONFIG_I2C) && IS_ENABLED(CONFIG_OF_OVERLAY)

struct unittest_i2c_bus_data {
	struct platform_device	*pdev;
	struct i2c_adapter	adap;
};

static int unittest_i2c_master_xfer(struct i2c_adapter *adap,
		struct i2c_msg *msgs, int num)
{
	struct unittest_i2c_bus_data *std = i2c_get_adapdata(adap);

	(void)std;

	return num;
}

static u32 unittest_i2c_functionality(struct i2c_adapter *adap)
{
	return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
}

static const struct i2c_algorithm unittest_i2c_algo = {
	.master_xfer	= unittest_i2c_master_xfer,
	.functionality	= unittest_i2c_functionality,
};

static int unittest_i2c_bus_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct device_node *np = dev->of_node;
	struct unittest_i2c_bus_data *std;
	struct i2c_adapter *adap;
	int ret;

	if (np == NULL) {
		dev_err(dev, "No OF data for device\n");
		return -EINVAL;

	}

	dev_dbg(dev, "%s for node @%pOF\n", __func__, np);

	std = devm_kzalloc(dev, sizeof(*std), GFP_KERNEL);
	if (!std)
		return -ENOMEM;

	/* link them together */
	std->pdev = pdev;
	platform_set_drvdata(pdev, std);

	adap = &std->adap;
	i2c_set_adapdata(adap, std);
	adap->nr = -1;
	strscpy(adap->name, pdev->name, sizeof(adap->name));
	adap->class = I2C_CLASS_DEPRECATED;
	adap->algo = &unittest_i2c_algo;
	adap->dev.parent = dev;
	adap->dev.of_node = dev->of_node;
	adap->timeout = 5 * HZ;
	adap->retries = 3;

	ret = i2c_add_numbered_adapter(adap);
	if (ret != 0) {
		dev_err(dev, "Failed to add I2C adapter\n");
		return ret;
	}

	return 0;
}

static void unittest_i2c_bus_remove(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct device_node *np = dev->of_node;
	struct unittest_i2c_bus_data *std = platform_get_drvdata(pdev);

	dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
	i2c_del_adapter(&std->adap);
}

static const struct of_device_id unittest_i2c_bus_match[] = {
	{ .compatible = "unittest-i2c-bus", },
	{},
};

static struct platform_driver unittest_i2c_bus_driver = {
	.probe			= unittest_i2c_bus_probe,
	.remove_new		= unittest_i2c_bus_remove,
	.driver = {
		.name		= "unittest-i2c-bus",
		.of_match_table	= of_match_ptr(unittest_i2c_bus_match),
	},
};

static int unittest_i2c_dev_probe(struct i2c_client *client)
{
	struct device *dev = &client->dev;
	struct device_node *np = client->dev.of_node;

	if (!np) {
		dev_err(dev, "No OF node\n");
		return -EINVAL;
	}

	dev_dbg(dev, "%s for node @%pOF\n", __func__, np);

	return 0;
};

static void unittest_i2c_dev_remove(struct i2c_client *client)
{
	struct device *dev = &client->dev;
	struct device_node *np = client->dev.of_node;

	dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
}

static const struct i2c_device_id unittest_i2c_dev_id[] = {
	{ .name = "unittest-i2c-dev" },
	{ }
};

static struct i2c_driver unittest_i2c_dev_driver = {
	.driver = {
		.name = "unittest-i2c-dev",
	},
	.probe = unittest_i2c_dev_probe,
	.remove = unittest_i2c_dev_remove,
	.id_table = unittest_i2c_dev_id,
};

#if IS_BUILTIN(CONFIG_I2C_MUX)

static int unittest_i2c_mux_select_chan(struct i2c_mux_core *muxc, u32 chan)
{
	return 0;
}

static int unittest_i2c_mux_probe(struct i2c_client *client)
{
	int i, nchans;
	struct device *dev = &client->dev;
	struct i2c_adapter *adap = client->adapter;
	struct device_node *np = client->dev.of_node, *child;
	struct i2c_mux_core *muxc;
	u32 reg, max_reg;

	dev_dbg(dev, "%s for node @%pOF\n", __func__, np);

	if (!np) {
		dev_err(dev, "No OF node\n");
		return -EINVAL;
	}

	max_reg = (u32)-1;
	for_each_child_of_node(np, child) {
		if (of_property_read_u32(child, "reg", &reg))
			continue;
		if (max_reg == (u32)-1 || reg > max_reg)
			max_reg = reg;
	}
	nchans = max_reg == (u32)-1 ? 0 : max_reg + 1;
	if (nchans == 0) {
		dev_err(dev, "No channels\n");
		return -EINVAL;
	}

	muxc = i2c_mux_alloc(adap, dev, nchans, 0, 0,
			     unittest_i2c_mux_select_chan, NULL);
	if (!muxc)
		return -ENOMEM;
	for (i = 0; i < nchans; i++) {
		if (i2c_mux_add_adapter(muxc, 0, i, 0)) {
			dev_err(dev, "Failed to register mux #%d\n", i);
			i2c_mux_del_adapters(muxc);
			return -ENODEV;
		}
	}

	i2c_set_clientdata(client, muxc);

	return 0;
};

static void unittest_i2c_mux_remove(struct i2c_client *client)
{
	struct device *dev = &client->dev;
	struct device_node *np = client->dev.of_node;
	struct i2c_mux_core *muxc = i2c_get_clientdata(client);

	dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
	i2c_mux_del_adapters(muxc);
}

static const struct i2c_device_id unittest_i2c_mux_id[] = {
	{ .name = "unittest-i2c-mux" },
	{ }
};

static struct i2c_driver unittest_i2c_mux_driver = {
	.driver = {
		.name = "unittest-i2c-mux",
	},
	.probe = unittest_i2c_mux_probe,
	.remove = unittest_i2c_mux_remove,
	.id_table = unittest_i2c_mux_id,
};

#endif

static int of_unittest_overlay_i2c_init(void)
{
	int ret;

	ret = i2c_add_driver(&unittest_i2c_dev_driver);
	if (unittest(ret == 0,
			"could not register unittest i2c device driver\n"))
		return ret;

	ret = platform_driver_register(&unittest_i2c_bus_driver);

	if (unittest(ret == 0,
			"could not register unittest i2c bus driver\n"))
		return ret;

#if IS_BUILTIN(CONFIG_I2C_MUX)

	EXPECT_BEGIN(KERN_INFO,
		     "i2c i2c-1: Added multiplexed i2c bus 2");

	ret = i2c_add_driver(&unittest_i2c_mux_driver);

	EXPECT_END(KERN_INFO,
		   "i2c i2c-1: Added multiplexed i2c bus 2");

	if (unittest(ret == 0,
			"could not register unittest i2c mux driver\n"))
		return ret;
#endif

	return 0;
}

static void of_unittest_overlay_i2c_cleanup(void)
{
#if IS_BUILTIN(CONFIG_I2C_MUX)
	i2c_del_driver(&unittest_i2c_mux_driver);
#endif
	platform_driver_unregister(&unittest_i2c_bus_driver);
	i2c_del_driver(&unittest_i2c_dev_driver);
}

static void __init of_unittest_overlay_i2c_12(void)
{
	int ret;

	/* device should enable */
	EXPECT_BEGIN(KERN_INFO,
		     "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest12/status");

	ret = of_unittest_apply_overlay_check(12, 12, 0, 1, I2C_OVERLAY);

	EXPECT_END(KERN_INFO,
		   "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest12/status");

	if (ret)
		return;

	unittest(1, "overlay test %d passed\n", 12);
}

/* test deactivation of device */
static void __init of_unittest_overlay_i2c_13(void)
{
	int ret;

	EXPECT_BEGIN(KERN_INFO,
		     "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest13/status");

	/* device should disable */
	ret = of_unittest_apply_overlay_check(13, 13, 1, 0, I2C_OVERLAY);

	EXPECT_END(KERN_INFO,
		   "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest13/status");

	if (ret)
		return;

	unittest(1, "overlay test %d passed\n", 13);
}

/* just check for i2c mux existence */
static void of_unittest_overlay_i2c_14(void)
{
}

static void __init of_unittest_overlay_i2c_15(void)
{
	int ret;

	/* device should enable */
	EXPECT_BEGIN(KERN_INFO,
		     "i2c i2c-1: Added multiplexed i2c bus 3");

	ret = of_unittest_apply_overlay_check(15, 15, 0, 1, I2C_OVERLAY);

	EXPECT_END(KERN_INFO,
		   "i2c i2c-1: Added multiplexed i2c bus 3");

	if (ret)
		return;

	unittest(1, "overlay test %d passed\n", 15);
}

#else

static inline void of_unittest_overlay_i2c_14(void) { }
static inline void of_unittest_overlay_i2c_15(void) { }

#endif

static int of_notify(struct notifier_block *nb, unsigned long action,
		     void *arg)
{
	struct of_overlay_notify_data *nd = arg;
	struct device_node *found;
	int ret;

	/*
	 * For overlay_16 .. overlay_19, check that returning an error
	 * works for each of the actions by setting an arbitrary return
	 * error number that matches the test number.  e.g. for unittest16,
	 * ret = -EBUSY which is -16.
	 *
	 * OVERLAY_INFO() for the overlays is declared to expect the same
	 * error number, so overlay_data_apply() will return no error.
	 *
	 * overlay_20 will return NOTIFY_DONE
	 */

	ret = 0;
	of_node_get(nd->overlay);

	switch (action) {

	case OF_OVERLAY_PRE_APPLY:
		found = of_find_node_by_name(nd->overlay, "test-unittest16");
		if (found) {
			of_node_put(found);
			ret = -EBUSY;
		}
		break;

	case OF_OVERLAY_POST_APPLY:
		found = of_find_node_by_name(nd->overlay, "test-unittest17");
		if (found) {
			of_node_put(found);
			ret = -EEXIST;
		}
		break;

	case OF_OVERLAY_PRE_REMOVE:
		found = of_find_node_by_name(nd->overlay, "test-unittest18");
		if (found) {
			of_node_put(found);
			ret = -EXDEV;
		}
		break;

	case OF_OVERLAY_POST_REMOVE:
		found = of_find_node_by_name(nd->overlay, "test-unittest19");
		if (found) {
			of_node_put(found);
			ret = -ENODEV;
		}
		break;

	default:			/* should not happen */
		of_node_put(nd->overlay);
		ret = -EINVAL;
		break;
	}

	if (ret)
		return notifier_from_errno(ret);

	return NOTIFY_DONE;
}

static struct notifier_block of_nb = {
	.notifier_call = of_notify,
};

static void __init of_unittest_overlay_notify(void)
{
	int ovcs_id;
	int ret;

	ret = of_overlay_notifier_register(&of_nb);
	unittest(!ret,
		 "of_overlay_notifier_register() failed, ret = %d\n", ret);
	if (ret)
		return;

	/*
	 * The overlays are applied by overlay_data_apply()
	 * instead of of_unittest_apply_overlay() so that they
	 * will not be tracked.  Thus they will not be removed
	 * by of_unittest_remove_tracked_overlays().
	 *
	 * Applying overlays 16 - 19 will each trigger an error for a
	 * different action in of_notify().
	 *
	 * Applying overlay 20 will not trigger any error in of_notify().
	 */

	/* ---  overlay 16  --- */

	EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset pre-apply notifier error -16, target: /testcase-data/overlay-node/test-bus");

	unittest(overlay_data_apply("overlay_16", &ovcs_id),
		 "test OF_OVERLAY_PRE_APPLY notify injected error\n");

	EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset pre-apply notifier error -16, target: /testcase-data/overlay-node/test-bus");

	unittest(ovcs_id, "ovcs_id not created for overlay_16\n");

	/* ---  overlay 17  --- */

	EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset post-apply notifier error -17, target: /testcase-data/overlay-node/test-bus");

	unittest(overlay_data_apply("overlay_17", &ovcs_id),
		 "test OF_OVERLAY_POST_APPLY notify injected error\n");

	EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset post-apply notifier error -17, target: /testcase-data/overlay-node/test-bus");

	unittest(ovcs_id, "ovcs_id not created for overlay_17\n");

	if (ovcs_id) {
		ret = of_overlay_remove(&ovcs_id);
		unittest(!ret,
			"overlay_17 of_overlay_remove(), ret = %d\n", ret);
	}

	/* ---  overlay 18  --- */

	unittest(overlay_data_apply("overlay_18", &ovcs_id),
		 "OF_OVERLAY_PRE_REMOVE notify injected error\n");

	unittest(ovcs_id, "ovcs_id not created for overlay_18\n");

	if (ovcs_id) {
		EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset pre-remove notifier error -18, target: /testcase-data/overlay-node/test-bus");

		ret = of_overlay_remove(&ovcs_id);
		EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset pre-remove notifier error -18, target: /testcase-data/overlay-node/test-bus");
		if (ret == -EXDEV) {
			/*
			 * change set ovcs_id should still exist
			 */
			unittest(1, "overlay_18 of_overlay_remove() injected error for OF_OVERLAY_PRE_REMOVE\n");
		} else {
			unittest(0, "overlay_18 of_overlay_remove() injected error for OF_OVERLAY_PRE_REMOVE not returned\n");
		}
	} else {
		unittest(1, "ovcs_id not created for overlay_18\n");
	}

	unittest(ovcs_id, "ovcs_id removed for overlay_18\n");

	/* ---  overlay 19  --- */

	unittest(overlay_data_apply("overlay_19", &ovcs_id),
		 "OF_OVERLAY_POST_REMOVE notify injected error\n");

	unittest(ovcs_id, "ovcs_id not created for overlay_19\n");

	if (ovcs_id) {
		EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset post-remove notifier error -19, target: /testcase-data/overlay-node/test-bus");
		ret = of_overlay_remove(&ovcs_id);
		EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset post-remove notifier error -19, target: /testcase-data/overlay-node/test-bus");
		if (ret == -ENODEV)
			unittest(1, "overlay_19 of_overlay_remove() injected error for OF_OVERLAY_POST_REMOVE\n");
		else
			unittest(0, "overlay_19 of_overlay_remove() injected error for OF_OVERLAY_POST_REMOVE not returned\n");
	} else {
		unittest(1, "ovcs_id removed for overlay_19\n");
	}

	unittest(!ovcs_id, "changeset ovcs_id = %d not removed for overlay_19\n",
		 ovcs_id);

	/* ---  overlay 20  --- */

	unittest(overlay_data_apply("overlay_20", &ovcs_id),
		 "overlay notify no injected error\n");

	if (ovcs_id) {
		ret = of_overlay_remove(&ovcs_id);
		if (ret)
			unittest(1, "overlay_20 failed to be destroyed, ret = %d\n",
				 ret);
	} else {
		unittest(1, "ovcs_id not created for overlay_20\n");
	}

	unittest(!of_overlay_notifier_unregister(&of_nb),
		 "of_overlay_notifier_unregister() failed, ret = %d\n", ret);
}

static void __init of_unittest_overlay(void)
{
	struct device_node *bus_np = NULL;

	if (platform_driver_register(&unittest_driver)) {
		unittest(0, "could not register unittest driver\n");
		goto out;
	}

	bus_np = of_find_node_by_path(bus_path);
	if (bus_np == NULL) {
		unittest(0, "could not find bus_path \"%s\"\n", bus_path);
		goto out;
	}

	if (of_platform_default_populate(bus_np, NULL, NULL)) {
		unittest(0, "could not populate bus @ \"%s\"\n", bus_path);
		goto out;
	}

	if (!of_unittest_device_exists(100, PDEV_OVERLAY)) {
		unittest(0, "could not find unittest0 @ \"%s\"\n",
				unittest_path(100, PDEV_OVERLAY));
		goto out;
	}

	if (of_unittest_device_exists(101, PDEV_OVERLAY)) {
		unittest(0, "unittest1 @ \"%s\" should not exist\n",
				unittest_path(101, PDEV_OVERLAY));
		goto out;
	}

	unittest(1, "basic infrastructure of overlays passed");

	/* tests in sequence */
	of_unittest_overlay_0();
	of_unittest_overlay_1();
	of_unittest_overlay_2();
	of_unittest_overlay_3();
	of_unittest_overlay_4();
	of_unittest_overlay_5();
	of_unittest_overlay_6();
	of_unittest_overlay_8();

	of_unittest_overlay_10();
	of_unittest_overlay_11();

#if IS_BUILTIN(CONFIG_I2C)
	if (unittest(of_unittest_overlay_i2c_init() == 0, "i2c init failed\n"))
		goto out;

	of_unittest_overlay_i2c_12();
	of_unittest_overlay_i2c_13();
	of_unittest_overlay_i2c_14();
	of_unittest_overlay_i2c_15();

	of_unittest_overlay_i2c_cleanup();
#endif

	of_unittest_overlay_gpio();

	of_unittest_remove_tracked_overlays();

	of_unittest_overlay_notify();

out:
	of_node_put(bus_np);
}

#else
static inline void __init of_unittest_overlay(void) { }
#endif

static void __init of_unittest_lifecycle(void)
{
#ifdef CONFIG_OF_DYNAMIC
	unsigned int refcount;
	int found_refcount_one = 0;
	int put_count = 0;
	struct device_node *np;
	struct device_node *prev_sibling, *next_sibling;
	const char *refcount_path = "/testcase-data/refcount-node";
	const char *refcount_parent_path = "/testcase-data";

	/*
	 * Node lifecycle tests, non-dynamic node:
	 *
	 * - Decrementing refcount to zero via of_node_put() should cause the
	 *   attempt to free the node memory by of_node_release() to fail
	 *   because the node is not a dynamic node.
	 *
	 * - Decrementing refcount past zero should result in additional
	 *   errors reported.
	 */

	np = of_find_node_by_path(refcount_path);
	unittest(np, "find refcount_path \"%s\"\n", refcount_path);
	if (np == NULL)
		goto out_skip_tests;

	while (!found_refcount_one) {

		if (put_count++ > 10) {
			unittest(0, "guardrail to avoid infinite loop\n");
			goto out_skip_tests;
		}

		refcount = kref_read(&np->kobj.kref);
		if (refcount == 1)
			found_refcount_one = 1;
		else
			of_node_put(np);
	}

	EXPECT_BEGIN(KERN_INFO, "OF: ERROR: of_node_release() detected bad of_node_put() on /testcase-data/refcount-node");

	/*
	 * refcount is now one, decrementing to zero will result in a call to
	 * of_node_release() to free the node's memory, which should result
	 * in an error
	 */
	unittest(1, "/testcase-data/refcount-node is one");
	of_node_put(np);

	EXPECT_END(KERN_INFO, "OF: ERROR: of_node_release() detected bad of_node_put() on /testcase-data/refcount-node");


	/*
	 * expect stack trace for subsequent of_node_put():
	 *   __refcount_sub_and_test() calls:
	 *   refcount_warn_saturate(r, REFCOUNT_SUB_UAF)
	 *
	 * Not capturing entire WARN_ONCE() trace with EXPECT_*(), just
	 * the first three lines, and the last line.
	 */
	EXPECT_BEGIN(KERN_INFO, "------------[ cut here ]------------");
	EXPECT_BEGIN(KERN_INFO, "WARNING: <<all>>");
	EXPECT_BEGIN(KERN_INFO, "refcount_t: underflow; use-after-free.");
	EXPECT_BEGIN(KERN_INFO, "---[ end trace <<int>> ]---");

	/* refcount is now zero, this should fail */
	unittest(1, "/testcase-data/refcount-node is zero");
	of_node_put(np);

	EXPECT_END(KERN_INFO, "---[ end trace <<int>> ]---");
	EXPECT_END(KERN_INFO, "refcount_t: underflow; use-after-free.");
	EXPECT_END(KERN_INFO, "WARNING: <<all>>");
	EXPECT_END(KERN_INFO, "------------[ cut here ]------------");

	/*
	 * Q. do we expect to get yet another warning?
	 * A. no, the WARNING is from WARN_ONCE()
	 */
	EXPECT_NOT_BEGIN(KERN_INFO, "------------[ cut here ]------------");
	EXPECT_NOT_BEGIN(KERN_INFO, "WARNING: <<all>>");
	EXPECT_NOT_BEGIN(KERN_INFO, "refcount_t: underflow; use-after-free.");
	EXPECT_NOT_BEGIN(KERN_INFO, "---[ end trace <<int>> ]---");

	unittest(1, "/testcase-data/refcount-node is zero, second time");
	of_node_put(np);

	EXPECT_NOT_END(KERN_INFO, "---[ end trace <<int>> ]---");
	EXPECT_NOT_END(KERN_INFO, "refcount_t: underflow; use-after-free.");
	EXPECT_NOT_END(KERN_INFO, "WARNING: <<all>>");
	EXPECT_NOT_END(KERN_INFO, "------------[ cut here ]------------");

	/*
	 * refcount of zero will trigger stack traces from any further
	 * attempt to of_node_get() node "refcount-node". One example of
	 * this is where of_unittest_check_node_linkage() will recursively
	 * scan the tree, with 'for_each_child_of_node()' doing an
	 * of_node_get() of the children of a node.
	 *
	 * Prevent the stack trace by removing node "refcount-node" from
	 * its parent's child list.
	 *
	 * WARNING:  EVIL, EVIL, EVIL:
	 *
	 *   Directly manipulate the child list of node /testcase-data to
	 *   remove child refcount-node.  This is ignoring all proper methods
	 *   of removing a child and will leak a small amount of memory.
	 */

	np = of_find_node_by_path(refcount_parent_path);
	unittest(np, "find refcount_parent_path \"%s\"\n", refcount_parent_path);
	unittest(np, "ERROR: devicetree live tree left in a 'bad state' if test fail\n");
	if (np == NULL)
		return;

	prev_sibling = np->child;
	next_sibling = prev_sibling->sibling;
	if (!strcmp(prev_sibling->full_name, "refcount-node")) {
		np->child = next_sibling;
		next_sibling = next_sibling->sibling;
	}
	while (next_sibling) {
		if (!strcmp(next_sibling->full_name, "refcount-node"))
			prev_sibling->sibling = next_sibling->sibling;
		prev_sibling = next_sibling;
		next_sibling = next_sibling->sibling;
	}
	of_node_put(np);

	return;

out_skip_tests:
#endif
	unittest(0, "One or more lifecycle tests skipped\n");
}

#ifdef CONFIG_OF_OVERLAY

/*
 * __dtbo_##overlay_name##_begin[] and __dtbo_##overlay_name##_end[] are
 * created by cmd_dt_S_dtbo in scripts/Makefile.lib
 */

#define OVERLAY_INFO_EXTERN(overlay_name) \
	extern uint8_t __dtbo_##overlay_name##_begin[]; \
	extern uint8_t __dtbo_##overlay_name##_end[]

#define OVERLAY_INFO(overlay_name, expected) \
{	.dtbo_begin       = __dtbo_##overlay_name##_begin, \
	.dtbo_end         = __dtbo_##overlay_name##_end, \
	.expected_result = expected, \
	.name            = #overlay_name, \
}

struct overlay_info {
	uint8_t		*dtbo_begin;
	uint8_t		*dtbo_end;
	int		expected_result;
	int		ovcs_id;
	char		*name;
};

OVERLAY_INFO_EXTERN(overlay_base);
OVERLAY_INFO_EXTERN(overlay);
OVERLAY_INFO_EXTERN(overlay_0);
OVERLAY_INFO_EXTERN(overlay_1);
OVERLAY_INFO_EXTERN(overlay_2);
OVERLAY_INFO_EXTERN(overlay_3);
OVERLAY_INFO_EXTERN(overlay_4);
OVERLAY_INFO_EXTERN(overlay_5);
OVERLAY_INFO_EXTERN(overlay_6);
OVERLAY_INFO_EXTERN(overlay_7);
OVERLAY_INFO_EXTERN(overlay_8);
OVERLAY_INFO_EXTERN(overlay_9);
OVERLAY_INFO_EXTERN(overlay_10);
OVERLAY_INFO_EXTERN(overlay_11);
OVERLAY_INFO_EXTERN(overlay_12);
OVERLAY_INFO_EXTERN(overlay_13);
OVERLAY_INFO_EXTERN(overlay_15);
OVERLAY_INFO_EXTERN(overlay_16);
OVERLAY_INFO_EXTERN(overlay_17);
OVERLAY_INFO_EXTERN(overlay_18);
OVERLAY_INFO_EXTERN(overlay_19);
OVERLAY_INFO_EXTERN(overlay_20);
OVERLAY_INFO_EXTERN(overlay_gpio_01);
OVERLAY_INFO_EXTERN(overlay_gpio_02a);
OVERLAY_INFO_EXTERN(overlay_gpio_02b);
OVERLAY_INFO_EXTERN(overlay_gpio_03);
OVERLAY_INFO_EXTERN(overlay_gpio_04a);
OVERLAY_INFO_EXTERN(overlay_gpio_04b);
OVERLAY_INFO_EXTERN(overlay_bad_add_dup_node);
OVERLAY_INFO_EXTERN(overlay_bad_add_dup_prop);
OVERLAY_INFO_EXTERN(overlay_bad_phandle);
OVERLAY_INFO_EXTERN(overlay_bad_symbol);

/* entries found by name */
static struct overlay_info overlays[] = {
	OVERLAY_INFO(overlay_base, -9999),
	OVERLAY_INFO(overlay, 0),
	OVERLAY_INFO(overlay_0, 0),
	OVERLAY_INFO(overlay_1, 0),
	OVERLAY_INFO(overlay_2, 0),
	OVERLAY_INFO(overlay_3, 0),
	OVERLAY_INFO(overlay_4, 0),
	OVERLAY_INFO(overlay_5, 0),
	OVERLAY_INFO(overlay_6, 0),
	OVERLAY_INFO(overlay_7, 0),
	OVERLAY_INFO(overlay_8, 0),
	OVERLAY_INFO(overlay_9, 0),
	OVERLAY_INFO(overlay_10, 0),
	OVERLAY_INFO(overlay_11, 0),
	OVERLAY_INFO(overlay_12, 0),
	OVERLAY_INFO(overlay_13, 0),
	OVERLAY_INFO(overlay_15, 0),
	OVERLAY_INFO(overlay_16, -EBUSY),
	OVERLAY_INFO(overlay_17, -EEXIST),
	OVERLAY_INFO(overlay_18, 0),
	OVERLAY_INFO(overlay_19, 0),
	OVERLAY_INFO(overlay_20, 0),
	OVERLAY_INFO(overlay_gpio_01, 0),
	OVERLAY_INFO(overlay_gpio_02a, 0),
	OVERLAY_INFO(overlay_gpio_02b, 0),
	OVERLAY_INFO(overlay_gpio_03, 0),
	OVERLAY_INFO(overlay_gpio_04a, 0),
	OVERLAY_INFO(overlay_gpio_04b, 0),
	OVERLAY_INFO(overlay_bad_add_dup_node, -EINVAL),
	OVERLAY_INFO(overlay_bad_add_dup_prop, -EINVAL),
	OVERLAY_INFO(overlay_bad_phandle, -EINVAL),
	OVERLAY_INFO(overlay_bad_symbol, -EINVAL),
	/* end marker */
	{.dtbo_begin = NULL, .dtbo_end = NULL, .expected_result = 0, .name = NULL}
};

static struct device_node *overlay_base_root;

static void * __init dt_alloc_memory(u64 size, u64 align)
{
	void *ptr = memblock_alloc(size, align);

	if (!ptr)
		panic("%s: Failed to allocate %llu bytes align=0x%llx\n",
		      __func__, size, align);

	return ptr;
}

/*
 * Create base device tree for the overlay unittest.
 *
 * This is called from very early boot code.
 *
 * Do as much as possible the same way as done in __unflatten_device_tree
 * and other early boot steps for the normal FDT so that the overlay base
 * unflattened tree will have the same characteristics as the real tree
 * (such as having memory allocated by the early allocator).  The goal
 * is to test "the real thing" as much as possible, and test "test setup
 * code" as little as possible.
 *
 * Have to stop before resolving phandles, because that uses kmalloc.
 */
void __init unittest_unflatten_overlay_base(void)
{
	struct overlay_info *info;
	u32 data_size;
	void *new_fdt;
	u32 size;
	int found = 0;
	const char *overlay_name = "overlay_base";

	for (info = overlays; info && info->name; info++) {
		if (!strcmp(overlay_name, info->name)) {
			found = 1;
			break;
		}
	}
	if (!found) {
		pr_err("no overlay data for %s\n", overlay_name);
		return;
	}

	info = &overlays[0];

	if (info->expected_result != -9999) {
		pr_err("No dtb 'overlay_base' to attach\n");
		return;
	}

	data_size = info->dtbo_end - info->dtbo_begin;
	if (!data_size) {
		pr_err("No dtb 'overlay_base' to attach\n");
		return;
	}

	size = fdt_totalsize(info->dtbo_begin);
	if (size != data_size) {
		pr_err("dtb 'overlay_base' header totalsize != actual size");
		return;
	}

	new_fdt = dt_alloc_memory(size, roundup_pow_of_two(FDT_V17_SIZE));
	if (!new_fdt) {
		pr_err("alloc for dtb 'overlay_base' failed");
		return;
	}

	memcpy(new_fdt, info->dtbo_begin, size);

	__unflatten_device_tree(new_fdt, NULL, &overlay_base_root,
				dt_alloc_memory, true);
}

/*
 * The purpose of of_unittest_overlay_data_add is to add an
 * overlay in the normal fashion.  This is a test of the whole
 * picture, instead of testing individual elements.
 *
 * A secondary purpose is to be able to verify that the contents of
 * /proc/device-tree/ contains the updated structure and values from
 * the overlay.  That must be verified separately in user space.
 *
 * Return 0 on unexpected error.
 */
static int __init overlay_data_apply(const char *overlay_name, int *ovcs_id)
{
	struct overlay_info *info;
	int found = 0;
	int ret;
	u32 size;

	for (info = overlays; info && info->name; info++) {
		if (!strcmp(overlay_name, info->name)) {
			found = 1;
			break;
		}
	}
	if (!found) {
		pr_err("no overlay data for %s\n", overlay_name);
		return 0;
	}

	size = info->dtbo_end - info->dtbo_begin;
	if (!size)
		pr_err("no overlay data for %s\n", overlay_name);

	ret = of_overlay_fdt_apply(info->dtbo_begin, size, &info->ovcs_id);
	if (ovcs_id)
		*ovcs_id = info->ovcs_id;
	if (ret < 0)
		goto out;

	pr_debug("%s applied\n", overlay_name);

out:
	if (ret != info->expected_result)
		pr_err("of_overlay_fdt_apply() expected %d, ret=%d, %s\n",
		       info->expected_result, ret, overlay_name);

	return (ret == info->expected_result);
}

/*
 * The purpose of of_unittest_overlay_high_level is to add an overlay
 * in the normal fashion.  This is a test of the whole picture,
 * instead of individual elements.
 *
 * The first part of the function is _not_ normal overlay usage; it is
 * finishing splicing the base overlay device tree into the live tree.
 */
static __init void of_unittest_overlay_high_level(void)
{
	struct device_node *last_sibling;
	struct device_node *np;
	struct device_node *of_symbols;
	struct device_node *overlay_base_symbols;
	struct device_node **pprev;
	struct property *prop;
	int ret;

	if (!overlay_base_root) {
		unittest(0, "overlay_base_root not initialized\n");
		return;
	}

	/*
	 * Could not fixup phandles in unittest_unflatten_overlay_base()
	 * because kmalloc() was not yet available.
	 */
	of_overlay_mutex_lock();
	of_resolve_phandles(overlay_base_root);
	of_overlay_mutex_unlock();


	/*
	 * do not allow overlay_base to duplicate any node already in
	 * tree, this greatly simplifies the code
	 */

	/*
	 * remove overlay_base_root node "__local_fixups", after
	 * being used by of_resolve_phandles()
	 */
	pprev = &overlay_base_root->child;
	for (np = overlay_base_root->child; np; np = np->sibling) {
		if (of_node_name_eq(np, "__local_fixups__")) {
			*pprev = np->sibling;
			break;
		}
		pprev = &np->sibling;
	}

	/* remove overlay_base_root node "__symbols__" if in live tree */
	of_symbols = of_get_child_by_name(of_root, "__symbols__");
	if (of_symbols) {
		/* will have to graft properties from node into live tree */
		pprev = &overlay_base_root->child;
		for (np = overlay_base_root->child; np; np = np->sibling) {
			if (of_node_name_eq(np, "__symbols__")) {
				overlay_base_symbols = np;
				*pprev = np->sibling;
				break;
			}
			pprev = &np->sibling;
		}
	}

	for_each_child_of_node(overlay_base_root, np) {
		struct device_node *base_child;
		for_each_child_of_node(of_root, base_child) {
			if (!strcmp(np->full_name, base_child->full_name)) {
				unittest(0, "illegal node name in overlay_base %pOFn",
					 np);
				of_node_put(np);
				of_node_put(base_child);
				return;
			}
		}
	}

	/*
	 * overlay 'overlay_base' is not allowed to have root
	 * properties, so only need to splice nodes into main device tree.
	 *
	 * root node of *overlay_base_root will not be freed, it is lost
	 * memory.
	 */

	for (np = overlay_base_root->child; np; np = np->sibling)
		np->parent = of_root;

	mutex_lock(&of_mutex);

	for (last_sibling = np = of_root->child; np; np = np->sibling)
		last_sibling = np;

	if (last_sibling)
		last_sibling->sibling = overlay_base_root->child;
	else
		of_root->child = overlay_base_root->child;

	for_each_of_allnodes_from(overlay_base_root, np)
		__of_attach_node_sysfs(np);

	if (of_symbols) {
		struct property *new_prop;
		for_each_property_of_node(overlay_base_symbols, prop) {

			new_prop = __of_prop_dup(prop, GFP_KERNEL);
			if (!new_prop) {
				unittest(0, "__of_prop_dup() of '%s' from overlay_base node __symbols__",
					 prop->name);
				goto err_unlock;
			}
			if (__of_add_property(of_symbols, new_prop)) {
				kfree(new_prop->name);
				kfree(new_prop->value);
				kfree(new_prop);
				/* "name" auto-generated by unflatten */
				if (!strcmp(prop->name, "name"))
					continue;
				unittest(0, "duplicate property '%s' in overlay_base node __symbols__",
					 prop->name);
				goto err_unlock;
			}
			if (__of_add_property_sysfs(of_symbols, new_prop)) {
				unittest(0, "unable to add property '%s' in overlay_base node __symbols__ to sysfs",
					 prop->name);
				goto err_unlock;
			}
		}
	}

	mutex_unlock(&of_mutex);


	/* now do the normal overlay usage test */

	EXPECT_BEGIN(KERN_ERR,
		     "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/substation@100/status");
	EXPECT_BEGIN(KERN_ERR,
		     "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/status");
	EXPECT_BEGIN(KERN_ERR,
		     "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@30/incline-up");
	EXPECT_BEGIN(KERN_ERR,
		     "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@40/incline-up");
	EXPECT_BEGIN(KERN_ERR,
		     "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/status");
	EXPECT_BEGIN(KERN_ERR,
		     "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/color");
	EXPECT_BEGIN(KERN_ERR,
		     "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/rate");
	EXPECT_BEGIN(KERN_ERR,
		     "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/hvac_2");
	EXPECT_BEGIN(KERN_ERR,
		     "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200");
	EXPECT_BEGIN(KERN_ERR,
		     "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_left");
	EXPECT_BEGIN(KERN_ERR,
		     "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_right");

	ret = overlay_data_apply("overlay", NULL);

	EXPECT_END(KERN_ERR,
		   "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_right");
	EXPECT_END(KERN_ERR,
		   "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_left");
	EXPECT_END(KERN_ERR,
		   "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200");
	EXPECT_END(KERN_ERR,
		   "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/hvac_2");
	EXPECT_END(KERN_ERR,
		   "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/rate");
	EXPECT_END(KERN_ERR,
		   "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/color");
	EXPECT_END(KERN_ERR,
		   "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/status");
	EXPECT_END(KERN_ERR,
		   "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@40/incline-up");
	EXPECT_END(KERN_ERR,
		   "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@30/incline-up");
	EXPECT_END(KERN_ERR,
		   "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/status");
	EXPECT_END(KERN_ERR,
		   "OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/substation@100/status");

	unittest(ret, "Adding overlay 'overlay' failed\n");

	EXPECT_BEGIN(KERN_ERR,
		     "OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/controller");
	EXPECT_BEGIN(KERN_ERR,
		     "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/controller/name");

	unittest(overlay_data_apply("overlay_bad_add_dup_node", NULL),
		 "Adding overlay 'overlay_bad_add_dup_node' failed\n");

	EXPECT_END(KERN_ERR,
		   "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/controller/name");
	EXPECT_END(KERN_ERR,
		   "OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/controller");

	EXPECT_BEGIN(KERN_ERR,
		     "OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/electric");
	EXPECT_BEGIN(KERN_ERR,
		     "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/rpm_avail");
	EXPECT_BEGIN(KERN_ERR,
		     "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/name");

	unittest(overlay_data_apply("overlay_bad_add_dup_prop", NULL),
		 "Adding overlay 'overlay_bad_add_dup_prop' failed\n");

	EXPECT_END(KERN_ERR,
		     "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/name");
	EXPECT_END(KERN_ERR,
		     "OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/rpm_avail");
	EXPECT_END(KERN_ERR,
		     "OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/electric");

	unittest(overlay_data_apply("overlay_bad_phandle", NULL),
		 "Adding overlay 'overlay_bad_phandle' failed\n");

	unittest(overlay_data_apply("overlay_bad_symbol", NULL),
		 "Adding overlay 'overlay_bad_symbol' failed\n");

	return;

err_unlock:
	mutex_unlock(&of_mutex);
}

#else

static inline __init void of_unittest_overlay_high_level(void) {}

#endif

static int __init of_unittest(void)
{
	struct device_node *np;
	int res;

	pr_info("start of unittest - you will see error messages\n");

	/* Taint the kernel so we know we've run tests. */
	add_taint(TAINT_TEST, LOCKDEP_STILL_OK);

	/* adding data for unittest */

	if (IS_ENABLED(CONFIG_UML))
		unittest_unflatten_overlay_base();

	res = unittest_data_add();
	if (res)
		return res;
	if (!of_aliases)
		of_aliases = of_find_node_by_path("/aliases");

	np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
	if (!np) {
		pr_info("No testcase data in device tree; not running tests\n");
		return 0;
	}
	of_node_put(np);

	of_unittest_check_tree_linkage();
	of_unittest_check_phandles();
	of_unittest_find_node_by_name();
	of_unittest_dynamic();
	of_unittest_parse_phandle_with_args();
	of_unittest_parse_phandle_with_args_map();
	of_unittest_printf();
	of_unittest_property_string();
	of_unittest_property_copy();
	of_unittest_changeset();
	of_unittest_parse_interrupts();
	of_unittest_parse_interrupts_extended();
	of_unittest_dma_get_max_cpu_address();
	of_unittest_parse_dma_ranges();
	of_unittest_pci_dma_ranges();
	of_unittest_bus_ranges();
	of_unittest_bus_3cell_ranges();
	of_unittest_reg();
	of_unittest_match_node();
	of_unittest_platform_populate();
	of_unittest_overlay();
	of_unittest_lifecycle();

	/* Double check linkage after removing testcase data */
	of_unittest_check_tree_linkage();

	of_unittest_overlay_high_level();

	pr_info("end of unittest - %i passed, %i failed\n",
		unittest_results.passed, unittest_results.failed);

	return 0;
}
late_initcall(of_unittest);