Stuck at home?

Check our new online training!

Stuck at home?

All Bootlin training courses
are now available
through on-line seminars

Bootlin logo

Elixir Cross Referencer

   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
/*
 * lm90.c - Part of lm_sensors, Linux kernel modules for hardware
 *          monitoring
 * Copyright (C) 2003-2010  Jean Delvare <jdelvare@suse.de>
 *
 * Based on the lm83 driver. The LM90 is a sensor chip made by National
 * Semiconductor. It reports up to two temperatures (its own plus up to
 * one external one) with a 0.125 deg resolution (1 deg for local
 * temperature) and a 3-4 deg accuracy.
 *
 * This driver also supports the LM89 and LM99, two other sensor chips
 * made by National Semiconductor. Both have an increased remote
 * temperature measurement accuracy (1 degree), and the LM99
 * additionally shifts remote temperatures (measured and limits) by 16
 * degrees, which allows for higher temperatures measurement.
 * Note that there is no way to differentiate between both chips.
 * When device is auto-detected, the driver will assume an LM99.
 *
 * This driver also supports the LM86, another sensor chip made by
 * National Semiconductor. It is exactly similar to the LM90 except it
 * has a higher accuracy.
 *
 * This driver also supports the ADM1032, a sensor chip made by Analog
 * Devices. That chip is similar to the LM90, with a few differences
 * that are not handled by this driver. Among others, it has a higher
 * accuracy than the LM90, much like the LM86 does.
 *
 * This driver also supports the MAX6657, MAX6658 and MAX6659 sensor
 * chips made by Maxim. These chips are similar to the LM86.
 * Note that there is no easy way to differentiate between the three
 * variants. We use the device address to detect MAX6659, which will result
 * in a detection as max6657 if it is on address 0x4c. The extra address
 * and features of the MAX6659 are only supported if the chip is configured
 * explicitly as max6659, or if its address is not 0x4c.
 * These chips lack the remote temperature offset feature.
 *
 * This driver also supports the MAX6646, MAX6647, MAX6648, MAX6649 and
 * MAX6692 chips made by Maxim.  These are again similar to the LM86,
 * but they use unsigned temperature values and can report temperatures
 * from 0 to 145 degrees.
 *
 * This driver also supports the MAX6680 and MAX6681, two other sensor
 * chips made by Maxim. These are quite similar to the other Maxim
 * chips. The MAX6680 and MAX6681 only differ in the pinout so they can
 * be treated identically.
 *
 * This driver also supports the MAX6695 and MAX6696, two other sensor
 * chips made by Maxim. These are also quite similar to other Maxim
 * chips, but support three temperature sensors instead of two. MAX6695
 * and MAX6696 only differ in the pinout so they can be treated identically.
 *
 * This driver also supports ADT7461 and ADT7461A from Analog Devices as well as
 * NCT1008 from ON Semiconductor. The chips are supported in both compatibility
 * and extended mode. They are mostly compatible with LM90 except for a data
 * format difference for the temperature value registers.
 *
 * This driver also supports the SA56004 from Philips. This device is
 * pin-compatible with the LM86, the ED/EDP parts are also address-compatible.
 *
 * This driver also supports the G781 from GMT. This device is compatible
 * with the ADM1032.
 *
 * This driver also supports TMP451 from Texas Instruments. This device is
 * supported in both compatibility and extended mode. It's mostly compatible
 * with ADT7461 except for local temperature low byte register and max
 * conversion rate.
 *
 * Since the LM90 was the first chipset supported by this driver, most
 * comments will refer to this chipset, but are actually general and
 * concern all supported chipsets, unless mentioned otherwise.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/i2c.h>
#include <linux/hwmon-sysfs.h>
#include <linux/hwmon.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/sysfs.h>
#include <linux/interrupt.h>
#include <linux/regulator/consumer.h>

/*
 * Addresses to scan
 * Address is fully defined internally and cannot be changed except for
 * MAX6659, MAX6680 and MAX6681.
 * LM86, LM89, LM90, LM99, ADM1032, ADM1032-1, ADT7461, ADT7461A, MAX6649,
 * MAX6657, MAX6658, NCT1008 and W83L771 have address 0x4c.
 * ADM1032-2, ADT7461-2, ADT7461A-2, LM89-1, LM99-1, MAX6646, and NCT1008D
 * have address 0x4d.
 * MAX6647 has address 0x4e.
 * MAX6659 can have address 0x4c, 0x4d or 0x4e.
 * MAX6680 and MAX6681 can have address 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b,
 * 0x4c, 0x4d or 0x4e.
 * SA56004 can have address 0x48 through 0x4F.
 */

static const unsigned short normal_i2c[] = {
	0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x48, 0x49, 0x4a, 0x4b, 0x4c,
	0x4d, 0x4e, 0x4f, I2C_CLIENT_END };

enum chips { lm90, adm1032, lm99, lm86, max6657, max6659, adt7461, max6680,
	max6646, w83l771, max6696, sa56004, g781, tmp451 };

/*
 * The LM90 registers
 */

#define LM90_REG_R_MAN_ID		0xFE
#define LM90_REG_R_CHIP_ID		0xFF
#define LM90_REG_R_CONFIG1		0x03
#define LM90_REG_W_CONFIG1		0x09
#define LM90_REG_R_CONFIG2		0xBF
#define LM90_REG_W_CONFIG2		0xBF
#define LM90_REG_R_CONVRATE		0x04
#define LM90_REG_W_CONVRATE		0x0A
#define LM90_REG_R_STATUS		0x02
#define LM90_REG_R_LOCAL_TEMP		0x00
#define LM90_REG_R_LOCAL_HIGH		0x05
#define LM90_REG_W_LOCAL_HIGH		0x0B
#define LM90_REG_R_LOCAL_LOW		0x06
#define LM90_REG_W_LOCAL_LOW		0x0C
#define LM90_REG_R_LOCAL_CRIT		0x20
#define LM90_REG_W_LOCAL_CRIT		0x20
#define LM90_REG_R_REMOTE_TEMPH		0x01
#define LM90_REG_R_REMOTE_TEMPL		0x10
#define LM90_REG_R_REMOTE_OFFSH		0x11
#define LM90_REG_W_REMOTE_OFFSH		0x11
#define LM90_REG_R_REMOTE_OFFSL		0x12
#define LM90_REG_W_REMOTE_OFFSL		0x12
#define LM90_REG_R_REMOTE_HIGHH		0x07
#define LM90_REG_W_REMOTE_HIGHH		0x0D
#define LM90_REG_R_REMOTE_HIGHL		0x13
#define LM90_REG_W_REMOTE_HIGHL		0x13
#define LM90_REG_R_REMOTE_LOWH		0x08
#define LM90_REG_W_REMOTE_LOWH		0x0E
#define LM90_REG_R_REMOTE_LOWL		0x14
#define LM90_REG_W_REMOTE_LOWL		0x14
#define LM90_REG_R_REMOTE_CRIT		0x19
#define LM90_REG_W_REMOTE_CRIT		0x19
#define LM90_REG_R_TCRIT_HYST		0x21
#define LM90_REG_W_TCRIT_HYST		0x21

/* MAX6646/6647/6649/6657/6658/6659/6695/6696 registers */

#define MAX6657_REG_R_LOCAL_TEMPL	0x11
#define MAX6696_REG_R_STATUS2		0x12
#define MAX6659_REG_R_REMOTE_EMERG	0x16
#define MAX6659_REG_W_REMOTE_EMERG	0x16
#define MAX6659_REG_R_LOCAL_EMERG	0x17
#define MAX6659_REG_W_LOCAL_EMERG	0x17

/*  SA56004 registers */

#define SA56004_REG_R_LOCAL_TEMPL 0x22

#define LM90_DEF_CONVRATE_RVAL	6	/* Def conversion rate register value */
#define LM90_MAX_CONVRATE_MS	16000	/* Maximum conversion rate in ms */

/* TMP451 registers */
#define TMP451_REG_R_LOCAL_TEMPL	0x15

/*
 * Device flags
 */
#define LM90_FLAG_ADT7461_EXT	(1 << 0) /* ADT7461 extended mode	*/
/* Device features */
#define LM90_HAVE_OFFSET	(1 << 1) /* temperature offset register	*/
#define LM90_HAVE_REM_LIMIT_EXT	(1 << 3) /* extended remote limit	*/
#define LM90_HAVE_EMERGENCY	(1 << 4) /* 3rd upper (emergency) limit	*/
#define LM90_HAVE_EMERGENCY_ALARM (1 << 5)/* emergency alarm		*/
#define LM90_HAVE_TEMP3		(1 << 6) /* 3rd temperature sensor	*/
#define LM90_HAVE_BROKEN_ALERT	(1 << 7) /* Broken alert		*/

/* LM90 status */
#define LM90_STATUS_LTHRM	(1 << 0) /* local THERM limit tripped */
#define LM90_STATUS_RTHRM	(1 << 1) /* remote THERM limit tripped */
#define LM90_STATUS_ROPEN	(1 << 2) /* remote is an open circuit */
#define LM90_STATUS_RLOW	(1 << 3) /* remote low temp limit tripped */
#define LM90_STATUS_RHIGH	(1 << 4) /* remote high temp limit tripped */
#define LM90_STATUS_LLOW	(1 << 5) /* local low temp limit tripped */
#define LM90_STATUS_LHIGH	(1 << 6) /* local high temp limit tripped */

#define MAX6696_STATUS2_R2THRM	(1 << 1) /* remote2 THERM limit tripped */
#define MAX6696_STATUS2_R2OPEN	(1 << 2) /* remote2 is an open circuit */
#define MAX6696_STATUS2_R2LOW	(1 << 3) /* remote2 low temp limit tripped */
#define MAX6696_STATUS2_R2HIGH	(1 << 4) /* remote2 high temp limit tripped */
#define MAX6696_STATUS2_ROT2	(1 << 5) /* remote emergency limit tripped */
#define MAX6696_STATUS2_R2OT2	(1 << 6) /* remote2 emergency limit tripped */
#define MAX6696_STATUS2_LOT2	(1 << 7) /* local emergency limit tripped */

/*
 * Driver data (common to all clients)
 */

static const struct i2c_device_id lm90_id[] = {
	{ "adm1032", adm1032 },
	{ "adt7461", adt7461 },
	{ "adt7461a", adt7461 },
	{ "g781", g781 },
	{ "lm90", lm90 },
	{ "lm86", lm86 },
	{ "lm89", lm86 },
	{ "lm99", lm99 },
	{ "max6646", max6646 },
	{ "max6647", max6646 },
	{ "max6649", max6646 },
	{ "max6657", max6657 },
	{ "max6658", max6657 },
	{ "max6659", max6659 },
	{ "max6680", max6680 },
	{ "max6681", max6680 },
	{ "max6695", max6696 },
	{ "max6696", max6696 },
	{ "nct1008", adt7461 },
	{ "w83l771", w83l771 },
	{ "sa56004", sa56004 },
	{ "tmp451", tmp451 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, lm90_id);

/*
 * chip type specific parameters
 */
struct lm90_params {
	u32 flags;		/* Capabilities */
	u16 alert_alarms;	/* Which alarm bits trigger ALERT# */
				/* Upper 8 bits for max6695/96 */
	u8 max_convrate;	/* Maximum conversion rate register value */
	u8 reg_local_ext;	/* Extended local temp register (optional) */
};

static const struct lm90_params lm90_params[] = {
	[adm1032] = {
		.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
		  | LM90_HAVE_BROKEN_ALERT,
		.alert_alarms = 0x7c,
		.max_convrate = 10,
	},
	[adt7461] = {
		.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
		  | LM90_HAVE_BROKEN_ALERT,
		.alert_alarms = 0x7c,
		.max_convrate = 10,
	},
	[g781] = {
		.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
		  | LM90_HAVE_BROKEN_ALERT,
		.alert_alarms = 0x7c,
		.max_convrate = 8,
	},
	[lm86] = {
		.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
		.alert_alarms = 0x7b,
		.max_convrate = 9,
	},
	[lm90] = {
		.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
		.alert_alarms = 0x7b,
		.max_convrate = 9,
	},
	[lm99] = {
		.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
		.alert_alarms = 0x7b,
		.max_convrate = 9,
	},
	[max6646] = {
		.alert_alarms = 0x7c,
		.max_convrate = 6,
		.reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL,
	},
	[max6657] = {
		.alert_alarms = 0x7c,
		.max_convrate = 8,
		.reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL,
	},
	[max6659] = {
		.flags = LM90_HAVE_EMERGENCY,
		.alert_alarms = 0x7c,
		.max_convrate = 8,
		.reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL,
	},
	[max6680] = {
		.flags = LM90_HAVE_OFFSET,
		.alert_alarms = 0x7c,
		.max_convrate = 7,
	},
	[max6696] = {
		.flags = LM90_HAVE_EMERGENCY
		  | LM90_HAVE_EMERGENCY_ALARM | LM90_HAVE_TEMP3,
		.alert_alarms = 0x1c7c,
		.max_convrate = 6,
		.reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL,
	},
	[w83l771] = {
		.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
		.alert_alarms = 0x7c,
		.max_convrate = 8,
	},
	[sa56004] = {
		.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
		.alert_alarms = 0x7b,
		.max_convrate = 9,
		.reg_local_ext = SA56004_REG_R_LOCAL_TEMPL,
	},
	[tmp451] = {
		.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
		  | LM90_HAVE_BROKEN_ALERT,
		.alert_alarms = 0x7c,
		.max_convrate = 9,
		.reg_local_ext = TMP451_REG_R_LOCAL_TEMPL,
	}
};

/*
 * TEMP8 register index
 */
enum lm90_temp8_reg_index {
	LOCAL_LOW = 0,
	LOCAL_HIGH,
	LOCAL_CRIT,
	REMOTE_CRIT,
	LOCAL_EMERG,	/* max6659 and max6695/96 */
	REMOTE_EMERG,	/* max6659 and max6695/96 */
	REMOTE2_CRIT,	/* max6695/96 only */
	REMOTE2_EMERG,	/* max6695/96 only */
	TEMP8_REG_NUM
};

/*
 * TEMP11 register index
 */
enum lm90_temp11_reg_index {
	REMOTE_TEMP = 0,
	REMOTE_LOW,
	REMOTE_HIGH,
	REMOTE_OFFSET,	/* except max6646, max6657/58/59, and max6695/96 */
	LOCAL_TEMP,
	REMOTE2_TEMP,	/* max6695/96 only */
	REMOTE2_LOW,	/* max6695/96 only */
	REMOTE2_HIGH,	/* max6695/96 only */
	TEMP11_REG_NUM
};

/*
 * Client data (each client gets its own)
 */

struct lm90_data {
	struct i2c_client *client;
	struct device *hwmon_dev;
	const struct attribute_group *groups[6];
	struct mutex update_lock;
	struct regulator *regulator;
	char valid; /* zero until following fields are valid */
	unsigned long last_updated; /* in jiffies */
	int kind;
	u32 flags;

	int update_interval;	/* in milliseconds */

	u8 config_orig;		/* Original configuration register value */
	u8 convrate_orig;	/* Original conversion rate register value */
	u16 alert_alarms;	/* Which alarm bits trigger ALERT# */
				/* Upper 8 bits for max6695/96 */
	u8 max_convrate;	/* Maximum conversion rate */
	u8 reg_local_ext;	/* local extension register offset */

	/* registers values */
	s8 temp8[TEMP8_REG_NUM];
	s16 temp11[TEMP11_REG_NUM];
	u8 temp_hyst;
	u16 alarms; /* bitvector (upper 8 bits for max6695/96) */
};

/*
 * Support functions
 */

/*
 * The ADM1032 supports PEC but not on write byte transactions, so we need
 * to explicitly ask for a transaction without PEC.
 */
static inline s32 adm1032_write_byte(struct i2c_client *client, u8 value)
{
	return i2c_smbus_xfer(client->adapter, client->addr,
			      client->flags & ~I2C_CLIENT_PEC,
			      I2C_SMBUS_WRITE, value, I2C_SMBUS_BYTE, NULL);
}

/*
 * It is assumed that client->update_lock is held (unless we are in
 * detection or initialization steps). This matters when PEC is enabled,
 * because we don't want the address pointer to change between the write
 * byte and the read byte transactions.
 */
static int lm90_read_reg(struct i2c_client *client, u8 reg, u8 *value)
{
	int err;

	if (client->flags & I2C_CLIENT_PEC) {
		err = adm1032_write_byte(client, reg);
		if (err >= 0)
			err = i2c_smbus_read_byte(client);
	} else
		err = i2c_smbus_read_byte_data(client, reg);

	if (err < 0) {
		dev_warn(&client->dev, "Register %#02x read failed (%d)\n",
			 reg, err);
		return err;
	}
	*value = err;

	return 0;
}

static int lm90_read16(struct i2c_client *client, u8 regh, u8 regl, u16 *value)
{
	int err;
	u8 oldh, newh, l;

	/*
	 * There is a trick here. We have to read two registers to have the
	 * sensor temperature, but we have to beware a conversion could occur
	 * between the readings. The datasheet says we should either use
	 * the one-shot conversion register, which we don't want to do
	 * (disables hardware monitoring) or monitor the busy bit, which is
	 * impossible (we can't read the values and monitor that bit at the
	 * exact same time). So the solution used here is to read the high
	 * byte once, then the low byte, then the high byte again. If the new
	 * high byte matches the old one, then we have a valid reading. Else
	 * we have to read the low byte again, and now we believe we have a
	 * correct reading.
	 */
	if ((err = lm90_read_reg(client, regh, &oldh))
	 || (err = lm90_read_reg(client, regl, &l))
	 || (err = lm90_read_reg(client, regh, &newh)))
		return err;
	if (oldh != newh) {
		err = lm90_read_reg(client, regl, &l);
		if (err)
			return err;
	}
	*value = (newh << 8) | l;

	return 0;
}

/*
 * client->update_lock must be held when calling this function (unless we are
 * in detection or initialization steps), and while a remote channel other
 * than channel 0 is selected. Also, calling code must make sure to re-select
 * external channel 0 before releasing the lock. This is necessary because
 * various registers have different meanings as a result of selecting a
 * non-default remote channel.
 */
static inline void lm90_select_remote_channel(struct i2c_client *client,
					      struct lm90_data *data,
					      int channel)
{
	u8 config;

	if (data->kind == max6696) {
		lm90_read_reg(client, LM90_REG_R_CONFIG1, &config);
		config &= ~0x08;
		if (channel)
			config |= 0x08;
		i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1,
					  config);
	}
}

/*
 * Set conversion rate.
 * client->update_lock must be held when calling this function (unless we are
 * in detection or initialization steps).
 */
static void lm90_set_convrate(struct i2c_client *client, struct lm90_data *data,
			      unsigned int interval)
{
	int i;
	unsigned int update_interval;

	/* Shift calculations to avoid rounding errors */
	interval <<= 6;

	/* find the nearest update rate */
	for (i = 0, update_interval = LM90_MAX_CONVRATE_MS << 6;
	     i < data->max_convrate; i++, update_interval >>= 1)
		if (interval >= update_interval * 3 / 4)
			break;

	i2c_smbus_write_byte_data(client, LM90_REG_W_CONVRATE, i);
	data->update_interval = DIV_ROUND_CLOSEST(update_interval, 64);
}

static struct lm90_data *lm90_update_device(struct device *dev)
{
	struct lm90_data *data = dev_get_drvdata(dev);
	struct i2c_client *client = data->client;
	unsigned long next_update;

	mutex_lock(&data->update_lock);

	next_update = data->last_updated +
		      msecs_to_jiffies(data->update_interval);
	if (time_after(jiffies, next_update) || !data->valid) {
		u8 h, l;
		u8 alarms;

		dev_dbg(&client->dev, "Updating lm90 data.\n");
		lm90_read_reg(client, LM90_REG_R_LOCAL_LOW,
			      &data->temp8[LOCAL_LOW]);
		lm90_read_reg(client, LM90_REG_R_LOCAL_HIGH,
			      &data->temp8[LOCAL_HIGH]);
		lm90_read_reg(client, LM90_REG_R_LOCAL_CRIT,
			      &data->temp8[LOCAL_CRIT]);
		lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT,
			      &data->temp8[REMOTE_CRIT]);
		lm90_read_reg(client, LM90_REG_R_TCRIT_HYST, &data->temp_hyst);

		if (data->reg_local_ext) {
			lm90_read16(client, LM90_REG_R_LOCAL_TEMP,
				    data->reg_local_ext,
				    &data->temp11[LOCAL_TEMP]);
		} else {
			if (lm90_read_reg(client, LM90_REG_R_LOCAL_TEMP,
					  &h) == 0)
				data->temp11[LOCAL_TEMP] = h << 8;
		}
		lm90_read16(client, LM90_REG_R_REMOTE_TEMPH,
			    LM90_REG_R_REMOTE_TEMPL,
			    &data->temp11[REMOTE_TEMP]);

		if (lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH, &h) == 0) {
			data->temp11[REMOTE_LOW] = h << 8;
			if ((data->flags & LM90_HAVE_REM_LIMIT_EXT)
			 && lm90_read_reg(client, LM90_REG_R_REMOTE_LOWL,
					  &l) == 0)
				data->temp11[REMOTE_LOW] |= l;
		}
		if (lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH, &h) == 0) {
			data->temp11[REMOTE_HIGH] = h << 8;
			if ((data->flags & LM90_HAVE_REM_LIMIT_EXT)
			 && lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHL,
					  &l) == 0)
				data->temp11[REMOTE_HIGH] |= l;
		}

		if (data->flags & LM90_HAVE_OFFSET) {
			if (lm90_read_reg(client, LM90_REG_R_REMOTE_OFFSH,
					  &h) == 0
			 && lm90_read_reg(client, LM90_REG_R_REMOTE_OFFSL,
					  &l) == 0)
				data->temp11[REMOTE_OFFSET] = (h << 8) | l;
		}
		if (data->flags & LM90_HAVE_EMERGENCY) {
			lm90_read_reg(client, MAX6659_REG_R_LOCAL_EMERG,
				      &data->temp8[LOCAL_EMERG]);
			lm90_read_reg(client, MAX6659_REG_R_REMOTE_EMERG,
				      &data->temp8[REMOTE_EMERG]);
		}
		lm90_read_reg(client, LM90_REG_R_STATUS, &alarms);
		data->alarms = alarms;	/* save as 16 bit value */

		if (data->kind == max6696) {
			lm90_select_remote_channel(client, data, 1);
			lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT,
				      &data->temp8[REMOTE2_CRIT]);
			lm90_read_reg(client, MAX6659_REG_R_REMOTE_EMERG,
				      &data->temp8[REMOTE2_EMERG]);
			lm90_read16(client, LM90_REG_R_REMOTE_TEMPH,
				    LM90_REG_R_REMOTE_TEMPL,
				    &data->temp11[REMOTE2_TEMP]);
			if (!lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH, &h))
				data->temp11[REMOTE2_LOW] = h << 8;
			if (!lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH, &h))
				data->temp11[REMOTE2_HIGH] = h << 8;
			lm90_select_remote_channel(client, data, 0);

			if (!lm90_read_reg(client, MAX6696_REG_R_STATUS2,
					   &alarms))
				data->alarms |= alarms << 8;
		}

		/*
		 * Re-enable ALERT# output if it was originally enabled and
		 * relevant alarms are all clear
		 */
		if ((data->config_orig & 0x80) == 0
		 && (data->alarms & data->alert_alarms) == 0) {
			u8 config;

			lm90_read_reg(client, LM90_REG_R_CONFIG1, &config);
			if (config & 0x80) {
				dev_dbg(&client->dev, "Re-enabling ALERT#\n");
				i2c_smbus_write_byte_data(client,
							  LM90_REG_W_CONFIG1,
							  config & ~0x80);
			}
		}

		data->last_updated = jiffies;
		data->valid = 1;
	}

	mutex_unlock(&data->update_lock);

	return data;
}

/*
 * Conversions
 * For local temperatures and limits, critical limits and the hysteresis
 * value, the LM90 uses signed 8-bit values with LSB = 1 degree Celsius.
 * For remote temperatures and limits, it uses signed 11-bit values with
 * LSB = 0.125 degree Celsius, left-justified in 16-bit registers.  Some
 * Maxim chips use unsigned values.
 */

static inline int temp_from_s8(s8 val)
{
	return val * 1000;
}

static inline int temp_from_u8(u8 val)
{
	return val * 1000;
}

static inline int temp_from_s16(s16 val)
{
	return val / 32 * 125;
}

static inline int temp_from_u16(u16 val)
{
	return val / 32 * 125;
}

static s8 temp_to_s8(long val)
{
	if (val <= -128000)
		return -128;
	if (val >= 127000)
		return 127;
	if (val < 0)
		return (val - 500) / 1000;
	return (val + 500) / 1000;
}

static u8 temp_to_u8(long val)
{
	if (val <= 0)
		return 0;
	if (val >= 255000)
		return 255;
	return (val + 500) / 1000;
}

static s16 temp_to_s16(long val)
{
	if (val <= -128000)
		return 0x8000;
	if (val >= 127875)
		return 0x7FE0;
	if (val < 0)
		return (val - 62) / 125 * 32;
	return (val + 62) / 125 * 32;
}

static u8 hyst_to_reg(long val)
{
	if (val <= 0)
		return 0;
	if (val >= 30500)
		return 31;
	return (val + 500) / 1000;
}

/*
 * ADT7461 in compatibility mode is almost identical to LM90 except that
 * attempts to write values that are outside the range 0 < temp < 127 are
 * treated as the boundary value.
 *
 * ADT7461 in "extended mode" operation uses unsigned integers offset by
 * 64 (e.g., 0 -> -64 degC).  The range is restricted to -64..191 degC.
 */
static inline int temp_from_u8_adt7461(struct lm90_data *data, u8 val)
{
	if (data->flags & LM90_FLAG_ADT7461_EXT)
		return (val - 64) * 1000;
	else
		return temp_from_s8(val);
}

static inline int temp_from_u16_adt7461(struct lm90_data *data, u16 val)
{
	if (data->flags & LM90_FLAG_ADT7461_EXT)
		return (val - 0x4000) / 64 * 250;
	else
		return temp_from_s16(val);
}

static u8 temp_to_u8_adt7461(struct lm90_data *data, long val)
{
	if (data->flags & LM90_FLAG_ADT7461_EXT) {
		if (val <= -64000)
			return 0;
		if (val >= 191000)
			return 0xFF;
		return (val + 500 + 64000) / 1000;
	} else {
		if (val <= 0)
			return 0;
		if (val >= 127000)
			return 127;
		return (val + 500) / 1000;
	}
}

static u16 temp_to_u16_adt7461(struct lm90_data *data, long val)
{
	if (data->flags & LM90_FLAG_ADT7461_EXT) {
		if (val <= -64000)
			return 0;
		if (val >= 191750)
			return 0xFFC0;
		return (val + 64000 + 125) / 250 * 64;
	} else {
		if (val <= 0)
			return 0;
		if (val >= 127750)
			return 0x7FC0;
		return (val + 125) / 250 * 64;
	}
}

/*
 * Sysfs stuff
 */

static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr,
			  char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	struct lm90_data *data = lm90_update_device(dev);
	int temp;

	if (data->kind == adt7461 || data->kind == tmp451)
		temp = temp_from_u8_adt7461(data, data->temp8[attr->index]);
	else if (data->kind == max6646)
		temp = temp_from_u8(data->temp8[attr->index]);
	else
		temp = temp_from_s8(data->temp8[attr->index]);

	/* +16 degrees offset for temp2 for the LM99 */
	if (data->kind == lm99 && attr->index == 3)
		temp += 16000;

	return sprintf(buf, "%d\n", temp);
}

static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr,
			 const char *buf, size_t count)
{
	static const u8 reg[TEMP8_REG_NUM] = {
		LM90_REG_W_LOCAL_LOW,
		LM90_REG_W_LOCAL_HIGH,
		LM90_REG_W_LOCAL_CRIT,
		LM90_REG_W_REMOTE_CRIT,
		MAX6659_REG_W_LOCAL_EMERG,
		MAX6659_REG_W_REMOTE_EMERG,
		LM90_REG_W_REMOTE_CRIT,
		MAX6659_REG_W_REMOTE_EMERG,
	};

	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	struct lm90_data *data = dev_get_drvdata(dev);
	struct i2c_client *client = data->client;
	int nr = attr->index;
	long val;
	int err;

	err = kstrtol(buf, 10, &val);
	if (err < 0)
		return err;

	/* +16 degrees offset for temp2 for the LM99 */
	if (data->kind == lm99 && attr->index == 3)
		val -= 16000;

	mutex_lock(&data->update_lock);
	if (data->kind == adt7461 || data->kind == tmp451)
		data->temp8[nr] = temp_to_u8_adt7461(data, val);
	else if (data->kind == max6646)
		data->temp8[nr] = temp_to_u8(val);
	else
		data->temp8[nr] = temp_to_s8(val);

	lm90_select_remote_channel(client, data, nr >= 6);
	i2c_smbus_write_byte_data(client, reg[nr], data->temp8[nr]);
	lm90_select_remote_channel(client, data, 0);

	mutex_unlock(&data->update_lock);
	return count;
}

static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,
			   char *buf)
{
	struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
	struct lm90_data *data = lm90_update_device(dev);
	int temp;

	if (data->kind == adt7461 || data->kind == tmp451)
		temp = temp_from_u16_adt7461(data, data->temp11[attr->index]);
	else if (data->kind == max6646)
		temp = temp_from_u16(data->temp11[attr->index]);
	else
		temp = temp_from_s16(data->temp11[attr->index]);

	/* +16 degrees offset for temp2 for the LM99 */
	if (data->kind == lm99 &&  attr->index <= 2)
		temp += 16000;

	return sprintf(buf, "%d\n", temp);
}

static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
			  const char *buf, size_t count)
{
	struct {
		u8 high;
		u8 low;
		int channel;
	} reg[5] = {
		{ LM90_REG_W_REMOTE_LOWH, LM90_REG_W_REMOTE_LOWL, 0 },
		{ LM90_REG_W_REMOTE_HIGHH, LM90_REG_W_REMOTE_HIGHL, 0 },
		{ LM90_REG_W_REMOTE_OFFSH, LM90_REG_W_REMOTE_OFFSL, 0 },
		{ LM90_REG_W_REMOTE_LOWH, LM90_REG_W_REMOTE_LOWL, 1 },
		{ LM90_REG_W_REMOTE_HIGHH, LM90_REG_W_REMOTE_HIGHL, 1 }
	};

	struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
	struct lm90_data *data = dev_get_drvdata(dev);
	struct i2c_client *client = data->client;
	int nr = attr->nr;
	int index = attr->index;
	long val;
	int err;

	err = kstrtol(buf, 10, &val);
	if (err < 0)
		return err;

	/* +16 degrees offset for temp2 for the LM99 */
	if (data->kind == lm99 && index <= 2)
		val -= 16000;

	mutex_lock(&data->update_lock);
	if (data->kind == adt7461 || data->kind == tmp451)
		data->temp11[index] = temp_to_u16_adt7461(data, val);
	else if (data->kind == max6646)
		data->temp11[index] = temp_to_u8(val) << 8;
	else if (data->flags & LM90_HAVE_REM_LIMIT_EXT)
		data->temp11[index] = temp_to_s16(val);
	else
		data->temp11[index] = temp_to_s8(val) << 8;

	lm90_select_remote_channel(client, data, reg[nr].channel);
	i2c_smbus_write_byte_data(client, reg[nr].high,
				  data->temp11[index] >> 8);
	if (data->flags & LM90_HAVE_REM_LIMIT_EXT)
		i2c_smbus_write_byte_data(client, reg[nr].low,
					  data->temp11[index] & 0xff);
	lm90_select_remote_channel(client, data, 0);

	mutex_unlock(&data->update_lock);
	return count;
}

static ssize_t show_temphyst(struct device *dev,
			     struct device_attribute *devattr,
			     char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	struct lm90_data *data = lm90_update_device(dev);
	int temp;

	if (data->kind == adt7461 || data->kind == tmp451)
		temp = temp_from_u8_adt7461(data, data->temp8[attr->index]);
	else if (data->kind == max6646)
		temp = temp_from_u8(data->temp8[attr->index]);
	else
		temp = temp_from_s8(data->temp8[attr->index]);

	/* +16 degrees offset for temp2 for the LM99 */
	if (data->kind == lm99 && attr->index == 3)
		temp += 16000;

	return sprintf(buf, "%d\n", temp - temp_from_s8(data->temp_hyst));
}

static ssize_t set_temphyst(struct device *dev, struct device_attribute *dummy,
			    const char *buf, size_t count)
{
	struct lm90_data *data = dev_get_drvdata(dev);
	struct i2c_client *client = data->client;
	long val;
	int err;
	int temp;

	err = kstrtol(buf, 10, &val);
	if (err < 0)
		return err;

	mutex_lock(&data->update_lock);
	if (data->kind == adt7461 || data->kind == tmp451)
		temp = temp_from_u8_adt7461(data, data->temp8[LOCAL_CRIT]);
	else if (data->kind == max6646)
		temp = temp_from_u8(data->temp8[LOCAL_CRIT]);
	else
		temp = temp_from_s8(data->temp8[LOCAL_CRIT]);

	data->temp_hyst = hyst_to_reg(temp - val);
	i2c_smbus_write_byte_data(client, LM90_REG_W_TCRIT_HYST,
				  data->temp_hyst);
	mutex_unlock(&data->update_lock);
	return count;
}

static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy,
			   char *buf)
{
	struct lm90_data *data = lm90_update_device(dev);
	return sprintf(buf, "%d\n", data->alarms);
}

static ssize_t show_alarm(struct device *dev, struct device_attribute
			  *devattr, char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	struct lm90_data *data = lm90_update_device(dev);
	int bitnr = attr->index;

	return sprintf(buf, "%d\n", (data->alarms >> bitnr) & 1);
}

static ssize_t show_update_interval(struct device *dev,
				    struct device_attribute *attr, char *buf)
{
	struct lm90_data *data = dev_get_drvdata(dev);

	return sprintf(buf, "%u\n", data->update_interval);
}

static ssize_t set_update_interval(struct device *dev,
				   struct device_attribute *attr,
				   const char *buf, size_t count)
{
	struct lm90_data *data = dev_get_drvdata(dev);
	struct i2c_client *client = data->client;
	unsigned long val;
	int err;

	err = kstrtoul(buf, 10, &val);
	if (err)
		return err;

	mutex_lock(&data->update_lock);
	lm90_set_convrate(client, data, clamp_val(val, 0, 100000));
	mutex_unlock(&data->update_lock);

	return count;
}

static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp11, NULL,
	0, LOCAL_TEMP);
static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp11, NULL,
	0, REMOTE_TEMP);
static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp8,
	set_temp8, LOCAL_LOW);
static SENSOR_DEVICE_ATTR_2(temp2_min, S_IWUSR | S_IRUGO, show_temp11,
	set_temp11, 0, REMOTE_LOW);
static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp8,
	set_temp8, LOCAL_HIGH);
static SENSOR_DEVICE_ATTR_2(temp2_max, S_IWUSR | S_IRUGO, show_temp11,
	set_temp11, 1, REMOTE_HIGH);
static SENSOR_DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp8,
	set_temp8, LOCAL_CRIT);
static SENSOR_DEVICE_ATTR(temp2_crit, S_IWUSR | S_IRUGO, show_temp8,
	set_temp8, REMOTE_CRIT);
static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temphyst,
	set_temphyst, LOCAL_CRIT);
static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO, show_temphyst, NULL,
	REMOTE_CRIT);
static SENSOR_DEVICE_ATTR_2(temp2_offset, S_IWUSR | S_IRUGO, show_temp11,
	set_temp11, 2, REMOTE_OFFSET);

/* Individual alarm files */
static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1);
static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2);
static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);
static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4);
static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL, 5);
static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6);
/* Raw alarm file for compatibility */
static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);

static DEVICE_ATTR(update_interval, S_IRUGO | S_IWUSR, show_update_interval,
		   set_update_interval);

static struct attribute *lm90_attributes[] = {
	&sensor_dev_attr_temp1_input.dev_attr.attr,
	&sensor_dev_attr_temp2_input.dev_attr.attr,
	&sensor_dev_attr_temp1_min.dev_attr.attr,
	&sensor_dev_attr_temp2_min.dev_attr.attr,
	&sensor_dev_attr_temp1_max.dev_attr.attr,
	&sensor_dev_attr_temp2_max.dev_attr.attr,
	&sensor_dev_attr_temp1_crit.dev_attr.attr,
	&sensor_dev_attr_temp2_crit.dev_attr.attr,
	&sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
	&sensor_dev_attr_temp2_crit_hyst.dev_attr.attr,

	&sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
	&sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
	&sensor_dev_attr_temp2_fault.dev_attr.attr,
	&sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
	&sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
	&sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
	&sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
	&dev_attr_alarms.attr,
	&dev_attr_update_interval.attr,
	NULL
};

static const struct attribute_group lm90_group = {
	.attrs = lm90_attributes,
};

static struct attribute *lm90_temp2_offset_attributes[] = {
	&sensor_dev_attr_temp2_offset.dev_attr.attr,
	NULL
};

static const struct attribute_group lm90_temp2_offset_group = {
	.attrs = lm90_temp2_offset_attributes,
};

/*
 * Additional attributes for devices with emergency sensors
 */
static SENSOR_DEVICE_ATTR(temp1_emergency, S_IWUSR | S_IRUGO, show_temp8,
	set_temp8, LOCAL_EMERG);
static SENSOR_DEVICE_ATTR(temp2_emergency, S_IWUSR | S_IRUGO, show_temp8,
	set_temp8, REMOTE_EMERG);
static SENSOR_DEVICE_ATTR(temp1_emergency_hyst, S_IRUGO, show_temphyst,
			  NULL, LOCAL_EMERG);
static SENSOR_DEVICE_ATTR(temp2_emergency_hyst, S_IRUGO, show_temphyst,
			  NULL, REMOTE_EMERG);

static struct attribute *lm90_emergency_attributes[] = {
	&sensor_dev_attr_temp1_emergency.dev_attr.attr,
	&sensor_dev_attr_temp2_emergency.dev_attr.attr,
	&sensor_dev_attr_temp1_emergency_hyst.dev_attr.attr,
	&sensor_dev_attr_temp2_emergency_hyst.dev_attr.attr,
	NULL
};

static const struct attribute_group lm90_emergency_group = {
	.attrs = lm90_emergency_attributes,
};

static SENSOR_DEVICE_ATTR(temp1_emergency_alarm, S_IRUGO, show_alarm, NULL, 15);
static SENSOR_DEVICE_ATTR(temp2_emergency_alarm, S_IRUGO, show_alarm, NULL, 13);

static struct attribute *lm90_emergency_alarm_attributes[] = {
	&sensor_dev_attr_temp1_emergency_alarm.dev_attr.attr,
	&sensor_dev_attr_temp2_emergency_alarm.dev_attr.attr,
	NULL
};

static const struct attribute_group lm90_emergency_alarm_group = {
	.attrs = lm90_emergency_alarm_attributes,
};

/*
 * Additional attributes for devices with 3 temperature sensors
 */
static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp11, NULL,
	0, REMOTE2_TEMP);
static SENSOR_DEVICE_ATTR_2(temp3_min, S_IWUSR | S_IRUGO, show_temp11,
	set_temp11, 3, REMOTE2_LOW);
static SENSOR_DEVICE_ATTR_2(temp3_max, S_IWUSR | S_IRUGO, show_temp11,
	set_temp11, 4, REMOTE2_HIGH);
static SENSOR_DEVICE_ATTR(temp3_crit, S_IWUSR | S_IRUGO, show_temp8,
	set_temp8, REMOTE2_CRIT);
static SENSOR_DEVICE_ATTR(temp3_crit_hyst, S_IRUGO, show_temphyst, NULL,
	REMOTE2_CRIT);
static SENSOR_DEVICE_ATTR(temp3_emergency, S_IWUSR | S_IRUGO, show_temp8,
	set_temp8, REMOTE2_EMERG);
static SENSOR_DEVICE_ATTR(temp3_emergency_hyst, S_IRUGO, show_temphyst,
			  NULL, REMOTE2_EMERG);

static SENSOR_DEVICE_ATTR(temp3_crit_alarm, S_IRUGO, show_alarm, NULL, 9);
static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 10);
static SENSOR_DEVICE_ATTR(temp3_min_alarm, S_IRUGO, show_alarm, NULL, 11);
static SENSOR_DEVICE_ATTR(temp3_max_alarm, S_IRUGO, show_alarm, NULL, 12);
static SENSOR_DEVICE_ATTR(temp3_emergency_alarm, S_IRUGO, show_alarm, NULL, 14);

static struct attribute *lm90_temp3_attributes[] = {
	&sensor_dev_attr_temp3_input.dev_attr.attr,
	&sensor_dev_attr_temp3_min.dev_attr.attr,
	&sensor_dev_attr_temp3_max.dev_attr.attr,
	&sensor_dev_attr_temp3_crit.dev_attr.attr,
	&sensor_dev_attr_temp3_crit_hyst.dev_attr.attr,
	&sensor_dev_attr_temp3_emergency.dev_attr.attr,
	&sensor_dev_attr_temp3_emergency_hyst.dev_attr.attr,

	&sensor_dev_attr_temp3_fault.dev_attr.attr,
	&sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
	&sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
	&sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
	&sensor_dev_attr_temp3_emergency_alarm.dev_attr.attr,
	NULL
};

static const struct attribute_group lm90_temp3_group = {
	.attrs = lm90_temp3_attributes,
};

/* pec used for ADM1032 only */
static ssize_t show_pec(struct device *dev, struct device_attribute *dummy,
			char *buf)
{
	struct i2c_client *client = to_i2c_client(dev);
	return sprintf(buf, "%d\n", !!(client->flags & I2C_CLIENT_PEC));
}

static ssize_t set_pec(struct device *dev, struct device_attribute *dummy,
		       const char *buf, size_t count)
{
	struct i2c_client *client = to_i2c_client(dev);
	long val;
	int err;

	err = kstrtol(buf, 10, &val);
	if (err < 0)
		return err;

	switch (val) {
	case 0:
		client->flags &= ~I2C_CLIENT_PEC;
		break;
	case 1:
		client->flags |= I2C_CLIENT_PEC;
		break;
	default:
		return -EINVAL;
	}

	return count;
}

static DEVICE_ATTR(pec, S_IWUSR | S_IRUGO, show_pec, set_pec);

/*
 * Real code
 */

/* Return 0 if detection is successful, -ENODEV otherwise */
static int lm90_detect(struct i2c_client *client,
		       struct i2c_board_info *info)
{
	struct i2c_adapter *adapter = client->adapter;
	int address = client->addr;
	const char *name = NULL;
	int man_id, chip_id, config1, config2, convrate;

	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
		return -ENODEV;

	/* detection and identification */
	man_id = i2c_smbus_read_byte_data(client, LM90_REG_R_MAN_ID);
	chip_id = i2c_smbus_read_byte_data(client, LM90_REG_R_CHIP_ID);
	config1 = i2c_smbus_read_byte_data(client, LM90_REG_R_CONFIG1);
	convrate = i2c_smbus_read_byte_data(client, LM90_REG_R_CONVRATE);
	if (man_id < 0 || chip_id < 0 || config1 < 0 || convrate < 0)
		return -ENODEV;

	if (man_id == 0x01 || man_id == 0x5C || man_id == 0x41) {
		config2 = i2c_smbus_read_byte_data(client, LM90_REG_R_CONFIG2);
		if (config2 < 0)
			return -ENODEV;
	} else
		config2 = 0;		/* Make compiler happy */

	if ((address == 0x4C || address == 0x4D)
	 && man_id == 0x01) { /* National Semiconductor */
		if ((config1 & 0x2A) == 0x00
		 && (config2 & 0xF8) == 0x00
		 && convrate <= 0x09) {
			if (address == 0x4C
			 && (chip_id & 0xF0) == 0x20) { /* LM90 */
				name = "lm90";
			} else
			if ((chip_id & 0xF0) == 0x30) { /* LM89/LM99 */
				name = "lm99";
				dev_info(&adapter->dev,
					 "Assuming LM99 chip at 0x%02x\n",
					 address);
				dev_info(&adapter->dev,
					 "If it is an LM89, instantiate it "
					 "with the new_device sysfs "
					 "interface\n");
			} else
			if (address == 0x4C
			 && (chip_id & 0xF0) == 0x10) { /* LM86 */
				name = "lm86";
			}
		}
	} else
	if ((address == 0x4C || address == 0x4D)
	 && man_id == 0x41) { /* Analog Devices */
		if ((chip_id & 0xF0) == 0x40 /* ADM1032 */
		 && (config1 & 0x3F) == 0x00
		 && convrate <= 0x0A) {
			name = "adm1032";
			/*
			 * The ADM1032 supports PEC, but only if combined
			 * transactions are not used.
			 */
			if (i2c_check_functionality(adapter,
						    I2C_FUNC_SMBUS_BYTE))
				info->flags |= I2C_CLIENT_PEC;
		} else
		if (chip_id == 0x51 /* ADT7461 */
		 && (config1 & 0x1B) == 0x00
		 && convrate <= 0x0A) {
			name = "adt7461";
		} else
		if (chip_id == 0x57 /* ADT7461A, NCT1008 */
		 && (config1 & 0x1B) == 0x00
		 && convrate <= 0x0A) {
			name = "adt7461a";
		}
	} else
	if (man_id == 0x4D) { /* Maxim */
		int emerg, emerg2, status2;

		/*
		 * We read MAX6659_REG_R_REMOTE_EMERG twice, and re-read
		 * LM90_REG_R_MAN_ID in between. If MAX6659_REG_R_REMOTE_EMERG
		 * exists, both readings will reflect the same value. Otherwise,
		 * the readings will be different.
		 */
		emerg = i2c_smbus_read_byte_data(client,
						 MAX6659_REG_R_REMOTE_EMERG);
		man_id = i2c_smbus_read_byte_data(client,
						  LM90_REG_R_MAN_ID);
		emerg2 = i2c_smbus_read_byte_data(client,
						  MAX6659_REG_R_REMOTE_EMERG);
		status2 = i2c_smbus_read_byte_data(client,
						   MAX6696_REG_R_STATUS2);
		if (emerg < 0 || man_id < 0 || emerg2 < 0 || status2 < 0)
			return -ENODEV;

		/*
		 * The MAX6657, MAX6658 and MAX6659 do NOT have a chip_id
		 * register. Reading from that address will return the last
		 * read value, which in our case is those of the man_id
		 * register. Likewise, the config1 register seems to lack a
		 * low nibble, so the value will be those of the previous
		 * read, so in our case those of the man_id register.
		 * MAX6659 has a third set of upper temperature limit registers.
		 * Those registers also return values on MAX6657 and MAX6658,
		 * thus the only way to detect MAX6659 is by its address.
		 * For this reason it will be mis-detected as MAX6657 if its
		 * address is 0x4C.
		 */
		if (chip_id == man_id
		 && (address == 0x4C || address == 0x4D || address == 0x4E)
		 && (config1 & 0x1F) == (man_id & 0x0F)
		 && convrate <= 0x09) {
			if (address == 0x4C)
				name = "max6657";
			else
				name = "max6659";
		} else
		/*
		 * Even though MAX6695 and MAX6696 do not have a chip ID
		 * register, reading it returns 0x01. Bit 4 of the config1
		 * register is unused and should return zero when read. Bit 0 of
		 * the status2 register is unused and should return zero when
		 * read.
		 *
		 * MAX6695 and MAX6696 have an additional set of temperature
		 * limit registers. We can detect those chips by checking if
		 * one of those registers exists.
		 */
		if (chip_id == 0x01
		 && (config1 & 0x10) == 0x00
		 && (status2 & 0x01) == 0x00
		 && emerg == emerg2
		 && convrate <= 0x07) {
			name = "max6696";
		} else
		/*
		 * The chip_id register of the MAX6680 and MAX6681 holds the
		 * revision of the chip. The lowest bit of the config1 register
		 * is unused and should return zero when read, so should the
		 * second to last bit of config1 (software reset).
		 */
		if (chip_id == 0x01
		 && (config1 & 0x03) == 0x00
		 && convrate <= 0x07) {
			name = "max6680";
		} else
		/*
		 * The chip_id register of the MAX6646/6647/6649 holds the
		 * revision of the chip. The lowest 6 bits of the config1
		 * register are unused and should return zero when read.
		 */
		if (chip_id == 0x59
		 && (config1 & 0x3f) == 0x00
		 && convrate <= 0x07) {
			name = "max6646";
		}
	} else
	if (address == 0x4C
	 && man_id == 0x5C) { /* Winbond/Nuvoton */
		if ((config1 & 0x2A) == 0x00
		 && (config2 & 0xF8) == 0x00) {
			if (chip_id == 0x01 /* W83L771W/G */
			 && convrate <= 0x09) {
				name = "w83l771";
			} else
			if ((chip_id & 0xFE) == 0x10 /* W83L771AWG/ASG */
			 && convrate <= 0x08) {
				name = "w83l771";
			}
		}
	} else
	if (address >= 0x48 && address <= 0x4F
	 && man_id == 0xA1) { /*  NXP Semiconductor/Philips */
		if (chip_id == 0x00
		 && (config1 & 0x2A) == 0x00
		 && (config2 & 0xFE) == 0x00
		 && convrate <= 0x09) {
			name = "sa56004";
		}
	} else
	if ((address == 0x4C || address == 0x4D)
	 && man_id == 0x47) { /* GMT */
		if (chip_id == 0x01 /* G781 */
		 && (config1 & 0x3F) == 0x00
		 && convrate <= 0x08)
			name = "g781";
	} else
	if (address == 0x4C
	 && man_id == 0x55) { /* Texas Instruments */
		int local_ext;

		local_ext = i2c_smbus_read_byte_data(client,
						     TMP451_REG_R_LOCAL_TEMPL);

		if (chip_id == 0x00 /* TMP451 */
		 && (config1 & 0x1B) == 0x00
		 && convrate <= 0x09
		 && (local_ext & 0x0F) == 0x00)
			name = "tmp451";
	}

	if (!name) { /* identification failed */
		dev_dbg(&adapter->dev,
			"Unsupported chip at 0x%02x (man_id=0x%02X, "
			"chip_id=0x%02X)\n", address, man_id, chip_id);
		return -ENODEV;
	}

	strlcpy(info->type, name, I2C_NAME_SIZE);

	return 0;
}

static void lm90_restore_conf(struct i2c_client *client, struct lm90_data *data)
{
	/* Restore initial configuration */
	i2c_smbus_write_byte_data(client, LM90_REG_W_CONVRATE,
				  data->convrate_orig);
	i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1,
				  data->config_orig);
}

static void lm90_init_client(struct i2c_client *client, struct lm90_data *data)
{
	u8 config, convrate;

	if (lm90_read_reg(client, LM90_REG_R_CONVRATE, &convrate) < 0) {
		dev_warn(&client->dev, "Failed to read convrate register!\n");
		convrate = LM90_DEF_CONVRATE_RVAL;
	}
	data->convrate_orig = convrate;

	/*
	 * Start the conversions.
	 */
	lm90_set_convrate(client, data, 500);	/* 500ms; 2Hz conversion rate */
	if (lm90_read_reg(client, LM90_REG_R_CONFIG1, &config) < 0) {
		dev_warn(&client->dev, "Initialization failed!\n");
		return;
	}
	data->config_orig = config;

	/* Check Temperature Range Select */
	if (data->kind == adt7461 || data->kind == tmp451) {
		if (config & 0x04)
			data->flags |= LM90_FLAG_ADT7461_EXT;
	}

	/*
	 * Put MAX6680/MAX8881 into extended resolution (bit 0x10,
	 * 0.125 degree resolution) and range (0x08, extend range
	 * to -64 degree) mode for the remote temperature sensor.
	 */
	if (data->kind == max6680)
		config |= 0x18;

	/*
	 * Select external channel 0 for max6695/96
	 */
	if (data->kind == max6696)
		config &= ~0x08;

	config &= 0xBF;	/* run */
	if (config != data->config_orig) /* Only write if changed */
		i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, config);
}

static bool lm90_is_tripped(struct i2c_client *client, u16 *status)
{
	struct lm90_data *data = i2c_get_clientdata(client);
	u8 st, st2 = 0;

	lm90_read_reg(client, LM90_REG_R_STATUS, &st);

	if (data->kind == max6696)
		lm90_read_reg(client, MAX6696_REG_R_STATUS2, &st2);

	*status = st | (st2 << 8);

	if ((st & 0x7f) == 0 && (st2 & 0xfe) == 0)
		return false;

	if ((st & (LM90_STATUS_LLOW | LM90_STATUS_LHIGH | LM90_STATUS_LTHRM)) ||
	    (st2 & MAX6696_STATUS2_LOT2))
		dev_warn(&client->dev,
			 "temp%d out of range, please check!\n", 1);
	if ((st & (LM90_STATUS_RLOW | LM90_STATUS_RHIGH | LM90_STATUS_RTHRM)) ||
	    (st2 & MAX6696_STATUS2_ROT2))
		dev_warn(&client->dev,
			 "temp%d out of range, please check!\n", 2);
	if (st & LM90_STATUS_ROPEN)
		dev_warn(&client->dev,
			 "temp%d diode open, please check!\n", 2);
	if (st2 & (MAX6696_STATUS2_R2LOW | MAX6696_STATUS2_R2HIGH |
		   MAX6696_STATUS2_R2THRM | MAX6696_STATUS2_R2OT2))
		dev_warn(&client->dev,
			 "temp%d out of range, please check!\n", 3);
	if (st2 & MAX6696_STATUS2_R2OPEN)
		dev_warn(&client->dev,
			 "temp%d diode open, please check!\n", 3);

	return true;
}

static irqreturn_t lm90_irq_thread(int irq, void *dev_id)
{
	struct i2c_client *client = dev_id;
	u16 status;

	if (lm90_is_tripped(client, &status))
		return IRQ_HANDLED;
	else
		return IRQ_NONE;
}

static int lm90_probe(struct i2c_client *client,
		      const struct i2c_device_id *id)
{
	struct device *dev = &client->dev;
	struct i2c_adapter *adapter = to_i2c_adapter(dev->parent);
	struct lm90_data *data;
	struct regulator *regulator;
	int groups = 0;
	int err;

	regulator = devm_regulator_get(dev, "vcc");
	if (IS_ERR(regulator))
		return PTR_ERR(regulator);

	err = regulator_enable(regulator);
	if (err < 0) {
		dev_err(dev, "Failed to enable regulator: %d\n", err);
		return err;
	}

	data = devm_kzalloc(dev, sizeof(struct lm90_data), GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	data->client = client;
	i2c_set_clientdata(client, data);
	mutex_init(&data->update_lock);

	data->regulator = regulator;

	/* Set the device type */
	data->kind = id->driver_data;
	if (data->kind == adm1032) {
		if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE))
			client->flags &= ~I2C_CLIENT_PEC;
	}

	/*
	 * Different devices have different alarm bits triggering the
	 * ALERT# output
	 */
	data->alert_alarms = lm90_params[data->kind].alert_alarms;

	/* Set chip capabilities */
	data->flags = lm90_params[data->kind].flags;
	data->reg_local_ext = lm90_params[data->kind].reg_local_ext;

	/* Set maximum conversion rate */
	data->max_convrate = lm90_params[data->kind].max_convrate;

	/* Initialize the LM90 chip */
	lm90_init_client(client, data);

	/* Register sysfs hooks */
	data->groups[groups++] = &lm90_group;

	if (data->flags & LM90_HAVE_OFFSET)
		data->groups[groups++] = &lm90_temp2_offset_group;

	if (data->flags & LM90_HAVE_EMERGENCY)
		data->groups[groups++] = &lm90_emergency_group;

	if (data->flags & LM90_HAVE_EMERGENCY_ALARM)
		data->groups[groups++] = &lm90_emergency_alarm_group;

	if (data->flags & LM90_HAVE_TEMP3)
		data->groups[groups++] = &lm90_temp3_group;

	if (client->flags & I2C_CLIENT_PEC) {
		err = device_create_file(dev, &dev_attr_pec);
		if (err)
			goto exit_restore;
	}

	data->hwmon_dev = hwmon_device_register_with_groups(dev, client->name,
							    data, data->groups);
	if (IS_ERR(data->hwmon_dev)) {
		err = PTR_ERR(data->hwmon_dev);
		goto exit_remove_pec;
	}

	if (client->irq) {
		dev_dbg(dev, "IRQ: %d\n", client->irq);
		err = devm_request_threaded_irq(dev, client->irq,
						NULL, lm90_irq_thread,
						IRQF_TRIGGER_LOW | IRQF_ONESHOT,
						"lm90", client);
		if (err < 0) {
			dev_err(dev, "cannot request IRQ %d\n", client->irq);
			goto exit_unregister;
		}
	}

	return 0;

exit_unregister:
	hwmon_device_unregister(data->hwmon_dev);
exit_remove_pec:
	device_remove_file(dev, &dev_attr_pec);
exit_restore:
	lm90_restore_conf(client, data);
	regulator_disable(data->regulator);

	return err;
}

static int lm90_remove(struct i2c_client *client)
{
	struct lm90_data *data = i2c_get_clientdata(client);

	hwmon_device_unregister(data->hwmon_dev);
	device_remove_file(&client->dev, &dev_attr_pec);
	lm90_restore_conf(client, data);
	regulator_disable(data->regulator);

	return 0;
}

static void lm90_alert(struct i2c_client *client, unsigned int flag)
{
	u16 alarms;

	if (lm90_is_tripped(client, &alarms)) {
		/*
		 * Disable ALERT# output, because these chips don't implement
		 * SMBus alert correctly; they should only hold the alert line
		 * low briefly.
		 */
		struct lm90_data *data = i2c_get_clientdata(client);

		if ((data->flags & LM90_HAVE_BROKEN_ALERT)
		 && (alarms & data->alert_alarms)) {
			u8 config;
			dev_dbg(&client->dev, "Disabling ALERT#\n");
			lm90_read_reg(client, LM90_REG_R_CONFIG1, &config);
			i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1,
						  config | 0x80);
		}
	} else {
		dev_info(&client->dev, "Everything OK\n");
	}
}

static struct i2c_driver lm90_driver = {
	.class		= I2C_CLASS_HWMON,
	.driver = {
		.name	= "lm90",
	},
	.probe		= lm90_probe,
	.remove		= lm90_remove,
	.alert		= lm90_alert,
	.id_table	= lm90_id,
	.detect		= lm90_detect,
	.address_list	= normal_i2c,
};

module_i2c_driver(lm90_driver);

MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>");
MODULE_DESCRIPTION("LM90/ADM1032 driver");
MODULE_LICENSE("GPL");