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
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
/*
 * Copyright (c) 2012-2015, The Linux Foundation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 and
 * only version 2 as published by the Free Software Foundation.
 *
 * 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.
 */

#include <linux/module.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/bitops.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/ktime.h>
#include <linux/regulator/driver.h>
#include <linux/regmap.h>
#include <linux/list.h>

/* Pin control enable input pins. */
#define SPMI_REGULATOR_PIN_CTRL_ENABLE_NONE		0x00
#define SPMI_REGULATOR_PIN_CTRL_ENABLE_EN0		0x01
#define SPMI_REGULATOR_PIN_CTRL_ENABLE_EN1		0x02
#define SPMI_REGULATOR_PIN_CTRL_ENABLE_EN2		0x04
#define SPMI_REGULATOR_PIN_CTRL_ENABLE_EN3		0x08
#define SPMI_REGULATOR_PIN_CTRL_ENABLE_HW_DEFAULT	0x10

/* Pin control high power mode input pins. */
#define SPMI_REGULATOR_PIN_CTRL_HPM_NONE		0x00
#define SPMI_REGULATOR_PIN_CTRL_HPM_EN0			0x01
#define SPMI_REGULATOR_PIN_CTRL_HPM_EN1			0x02
#define SPMI_REGULATOR_PIN_CTRL_HPM_EN2			0x04
#define SPMI_REGULATOR_PIN_CTRL_HPM_EN3			0x08
#define SPMI_REGULATOR_PIN_CTRL_HPM_SLEEP_B		0x10
#define SPMI_REGULATOR_PIN_CTRL_HPM_HW_DEFAULT		0x20

/*
 * Used with enable parameters to specify that hardware default register values
 * should be left unaltered.
 */
#define SPMI_REGULATOR_USE_HW_DEFAULT			2

/* Soft start strength of a voltage switch type regulator */
enum spmi_vs_soft_start_str {
	SPMI_VS_SOFT_START_STR_0P05_UA = 0,
	SPMI_VS_SOFT_START_STR_0P25_UA,
	SPMI_VS_SOFT_START_STR_0P55_UA,
	SPMI_VS_SOFT_START_STR_0P75_UA,
	SPMI_VS_SOFT_START_STR_HW_DEFAULT,
};

/**
 * struct spmi_regulator_init_data - spmi-regulator initialization data
 * @pin_ctrl_enable:        Bit mask specifying which hardware pins should be
 *				used to enable the regulator, if any
 *			    Value should be an ORing of
 *				SPMI_REGULATOR_PIN_CTRL_ENABLE_* constants.  If
 *				the bit specified by
 *				SPMI_REGULATOR_PIN_CTRL_ENABLE_HW_DEFAULT is
 *				set, then pin control enable hardware registers
 *				will not be modified.
 * @pin_ctrl_hpm:           Bit mask specifying which hardware pins should be
 *				used to force the regulator into high power
 *				mode, if any
 *			    Value should be an ORing of
 *				SPMI_REGULATOR_PIN_CTRL_HPM_* constants.  If
 *				the bit specified by
 *				SPMI_REGULATOR_PIN_CTRL_HPM_HW_DEFAULT is
 *				set, then pin control mode hardware registers
 *				will not be modified.
 * @vs_soft_start_strength: This parameter sets the soft start strength for
 *				voltage switch type regulators.  Its value
 *				should be one of SPMI_VS_SOFT_START_STR_*.  If
 *				its value is SPMI_VS_SOFT_START_STR_HW_DEFAULT,
 *				then the soft start strength will be left at its
 *				default hardware value.
 */
struct spmi_regulator_init_data {
	unsigned				pin_ctrl_enable;
	unsigned				pin_ctrl_hpm;
	enum spmi_vs_soft_start_str		vs_soft_start_strength;
};

/* These types correspond to unique register layouts. */
enum spmi_regulator_logical_type {
	SPMI_REGULATOR_LOGICAL_TYPE_SMPS,
	SPMI_REGULATOR_LOGICAL_TYPE_LDO,
	SPMI_REGULATOR_LOGICAL_TYPE_VS,
	SPMI_REGULATOR_LOGICAL_TYPE_BOOST,
	SPMI_REGULATOR_LOGICAL_TYPE_FTSMPS,
	SPMI_REGULATOR_LOGICAL_TYPE_BOOST_BYP,
	SPMI_REGULATOR_LOGICAL_TYPE_LN_LDO,
	SPMI_REGULATOR_LOGICAL_TYPE_ULT_LO_SMPS,
	SPMI_REGULATOR_LOGICAL_TYPE_ULT_HO_SMPS,
	SPMI_REGULATOR_LOGICAL_TYPE_ULT_LDO,
};

enum spmi_regulator_type {
	SPMI_REGULATOR_TYPE_BUCK		= 0x03,
	SPMI_REGULATOR_TYPE_LDO			= 0x04,
	SPMI_REGULATOR_TYPE_VS			= 0x05,
	SPMI_REGULATOR_TYPE_BOOST		= 0x1b,
	SPMI_REGULATOR_TYPE_FTS			= 0x1c,
	SPMI_REGULATOR_TYPE_BOOST_BYP		= 0x1f,
	SPMI_REGULATOR_TYPE_ULT_LDO		= 0x21,
	SPMI_REGULATOR_TYPE_ULT_BUCK		= 0x22,
};

enum spmi_regulator_subtype {
	SPMI_REGULATOR_SUBTYPE_GP_CTL		= 0x08,
	SPMI_REGULATOR_SUBTYPE_RF_CTL		= 0x09,
	SPMI_REGULATOR_SUBTYPE_N50		= 0x01,
	SPMI_REGULATOR_SUBTYPE_N150		= 0x02,
	SPMI_REGULATOR_SUBTYPE_N300		= 0x03,
	SPMI_REGULATOR_SUBTYPE_N600		= 0x04,
	SPMI_REGULATOR_SUBTYPE_N1200		= 0x05,
	SPMI_REGULATOR_SUBTYPE_N600_ST		= 0x06,
	SPMI_REGULATOR_SUBTYPE_N1200_ST		= 0x07,
	SPMI_REGULATOR_SUBTYPE_N900_ST		= 0x14,
	SPMI_REGULATOR_SUBTYPE_N300_ST		= 0x15,
	SPMI_REGULATOR_SUBTYPE_P50		= 0x08,
	SPMI_REGULATOR_SUBTYPE_P150		= 0x09,
	SPMI_REGULATOR_SUBTYPE_P300		= 0x0a,
	SPMI_REGULATOR_SUBTYPE_P600		= 0x0b,
	SPMI_REGULATOR_SUBTYPE_P1200		= 0x0c,
	SPMI_REGULATOR_SUBTYPE_LN		= 0x10,
	SPMI_REGULATOR_SUBTYPE_LV_P50		= 0x28,
	SPMI_REGULATOR_SUBTYPE_LV_P150		= 0x29,
	SPMI_REGULATOR_SUBTYPE_LV_P300		= 0x2a,
	SPMI_REGULATOR_SUBTYPE_LV_P600		= 0x2b,
	SPMI_REGULATOR_SUBTYPE_LV_P1200		= 0x2c,
	SPMI_REGULATOR_SUBTYPE_LV_P450		= 0x2d,
	SPMI_REGULATOR_SUBTYPE_LV100		= 0x01,
	SPMI_REGULATOR_SUBTYPE_LV300		= 0x02,
	SPMI_REGULATOR_SUBTYPE_MV300		= 0x08,
	SPMI_REGULATOR_SUBTYPE_MV500		= 0x09,
	SPMI_REGULATOR_SUBTYPE_HDMI		= 0x10,
	SPMI_REGULATOR_SUBTYPE_OTG		= 0x11,
	SPMI_REGULATOR_SUBTYPE_5V_BOOST		= 0x01,
	SPMI_REGULATOR_SUBTYPE_FTS_CTL		= 0x08,
	SPMI_REGULATOR_SUBTYPE_FTS2p5_CTL	= 0x09,
	SPMI_REGULATOR_SUBTYPE_BB_2A		= 0x01,
	SPMI_REGULATOR_SUBTYPE_ULT_HF_CTL1	= 0x0d,
	SPMI_REGULATOR_SUBTYPE_ULT_HF_CTL2	= 0x0e,
	SPMI_REGULATOR_SUBTYPE_ULT_HF_CTL3	= 0x0f,
	SPMI_REGULATOR_SUBTYPE_ULT_HF_CTL4	= 0x10,
};

enum spmi_common_regulator_registers {
	SPMI_COMMON_REG_DIG_MAJOR_REV		= 0x01,
	SPMI_COMMON_REG_TYPE			= 0x04,
	SPMI_COMMON_REG_SUBTYPE			= 0x05,
	SPMI_COMMON_REG_VOLTAGE_RANGE		= 0x40,
	SPMI_COMMON_REG_VOLTAGE_SET		= 0x41,
	SPMI_COMMON_REG_MODE			= 0x45,
	SPMI_COMMON_REG_ENABLE			= 0x46,
	SPMI_COMMON_REG_PULL_DOWN		= 0x48,
	SPMI_COMMON_REG_SOFT_START		= 0x4c,
	SPMI_COMMON_REG_STEP_CTRL		= 0x61,
};

enum spmi_vs_registers {
	SPMI_VS_REG_OCP				= 0x4a,
	SPMI_VS_REG_SOFT_START			= 0x4c,
};

enum spmi_boost_registers {
	SPMI_BOOST_REG_CURRENT_LIMIT		= 0x4a,
};

enum spmi_boost_byp_registers {
	SPMI_BOOST_BYP_REG_CURRENT_LIMIT	= 0x4b,
};

/* Used for indexing into ctrl_reg.  These are offets from 0x40 */
enum spmi_common_control_register_index {
	SPMI_COMMON_IDX_VOLTAGE_RANGE		= 0,
	SPMI_COMMON_IDX_VOLTAGE_SET		= 1,
	SPMI_COMMON_IDX_MODE			= 5,
	SPMI_COMMON_IDX_ENABLE			= 6,
};

/* Common regulator control register layout */
#define SPMI_COMMON_ENABLE_MASK			0x80
#define SPMI_COMMON_ENABLE			0x80
#define SPMI_COMMON_DISABLE			0x00
#define SPMI_COMMON_ENABLE_FOLLOW_HW_EN3_MASK	0x08
#define SPMI_COMMON_ENABLE_FOLLOW_HW_EN2_MASK	0x04
#define SPMI_COMMON_ENABLE_FOLLOW_HW_EN1_MASK	0x02
#define SPMI_COMMON_ENABLE_FOLLOW_HW_EN0_MASK	0x01
#define SPMI_COMMON_ENABLE_FOLLOW_ALL_MASK	0x0f

/* Common regulator mode register layout */
#define SPMI_COMMON_MODE_HPM_MASK		0x80
#define SPMI_COMMON_MODE_AUTO_MASK		0x40
#define SPMI_COMMON_MODE_BYPASS_MASK		0x20
#define SPMI_COMMON_MODE_FOLLOW_AWAKE_MASK	0x10
#define SPMI_COMMON_MODE_FOLLOW_HW_EN3_MASK	0x08
#define SPMI_COMMON_MODE_FOLLOW_HW_EN2_MASK	0x04
#define SPMI_COMMON_MODE_FOLLOW_HW_EN1_MASK	0x02
#define SPMI_COMMON_MODE_FOLLOW_HW_EN0_MASK	0x01
#define SPMI_COMMON_MODE_FOLLOW_ALL_MASK	0x1f

/* Common regulator pull down control register layout */
#define SPMI_COMMON_PULL_DOWN_ENABLE_MASK	0x80

/* LDO regulator current limit control register layout */
#define SPMI_LDO_CURRENT_LIMIT_ENABLE_MASK	0x80

/* LDO regulator soft start control register layout */
#define SPMI_LDO_SOFT_START_ENABLE_MASK		0x80

/* VS regulator over current protection control register layout */
#define SPMI_VS_OCP_OVERRIDE			0x01
#define SPMI_VS_OCP_NO_OVERRIDE			0x00

/* VS regulator soft start control register layout */
#define SPMI_VS_SOFT_START_ENABLE_MASK		0x80
#define SPMI_VS_SOFT_START_SEL_MASK		0x03

/* Boost regulator current limit control register layout */
#define SPMI_BOOST_CURRENT_LIMIT_ENABLE_MASK	0x80
#define SPMI_BOOST_CURRENT_LIMIT_MASK		0x07

#define SPMI_VS_OCP_DEFAULT_MAX_RETRIES		10
#define SPMI_VS_OCP_DEFAULT_RETRY_DELAY_MS	30
#define SPMI_VS_OCP_FALL_DELAY_US		90
#define SPMI_VS_OCP_FAULT_DELAY_US		20000

#define SPMI_FTSMPS_STEP_CTRL_STEP_MASK		0x18
#define SPMI_FTSMPS_STEP_CTRL_STEP_SHIFT	3
#define SPMI_FTSMPS_STEP_CTRL_DELAY_MASK	0x07
#define SPMI_FTSMPS_STEP_CTRL_DELAY_SHIFT	0

/* Clock rate in kHz of the FTSMPS regulator reference clock. */
#define SPMI_FTSMPS_CLOCK_RATE		19200

/* Minimum voltage stepper delay for each step. */
#define SPMI_FTSMPS_STEP_DELAY		8
#define SPMI_DEFAULT_STEP_DELAY		20

/*
 * The ratio SPMI_FTSMPS_STEP_MARGIN_NUM/SPMI_FTSMPS_STEP_MARGIN_DEN is used to
 * adjust the step rate in order to account for oscillator variance.
 */
#define SPMI_FTSMPS_STEP_MARGIN_NUM	4
#define SPMI_FTSMPS_STEP_MARGIN_DEN	5

/* VSET value to decide the range of ULT SMPS */
#define ULT_SMPS_RANGE_SPLIT 0x60

/**
 * struct spmi_voltage_range - regulator set point voltage mapping description
 * @min_uV:		Minimum programmable output voltage resulting from
 *			set point register value 0x00
 * @max_uV:		Maximum programmable output voltage
 * @step_uV:		Output voltage increase resulting from the set point
 *			register value increasing by 1
 * @set_point_min_uV:	Minimum allowed voltage
 * @set_point_max_uV:	Maximum allowed voltage.  This may be tweaked in order
 *			to pick which range should be used in the case of
 *			overlapping set points.
 * @n_voltages:		Number of preferred voltage set points present in this
 *			range
 * @range_sel:		Voltage range register value corresponding to this range
 *
 * The following relationships must be true for the values used in this struct:
 * (max_uV - min_uV) % step_uV == 0
 * (set_point_min_uV - min_uV) % step_uV == 0*
 * (set_point_max_uV - min_uV) % step_uV == 0*
 * n_voltages = (set_point_max_uV - set_point_min_uV) / step_uV + 1
 *
 * *Note, set_point_min_uV == set_point_max_uV == 0 is allowed in order to
 * specify that the voltage range has meaning, but is not preferred.
 */
struct spmi_voltage_range {
	int					min_uV;
	int					max_uV;
	int					step_uV;
	int					set_point_min_uV;
	int					set_point_max_uV;
	unsigned				n_voltages;
	u8					range_sel;
};

/*
 * The ranges specified in the spmi_voltage_set_points struct must be listed
 * so that range[i].set_point_max_uV < range[i+1].set_point_min_uV.
 */
struct spmi_voltage_set_points {
	struct spmi_voltage_range		*range;
	int					count;
	unsigned				n_voltages;
};

struct spmi_regulator {
	struct regulator_desc			desc;
	struct device				*dev;
	struct delayed_work			ocp_work;
	struct regmap				*regmap;
	struct spmi_voltage_set_points		*set_points;
	enum spmi_regulator_logical_type	logical_type;
	int					ocp_irq;
	int					ocp_count;
	int					ocp_max_retries;
	int					ocp_retry_delay_ms;
	int					hpm_min_load;
	int					slew_rate;
	ktime_t					vs_enable_time;
	u16					base;
	struct list_head			node;
};

struct spmi_regulator_mapping {
	enum spmi_regulator_type		type;
	enum spmi_regulator_subtype		subtype;
	enum spmi_regulator_logical_type	logical_type;
	u32					revision_min;
	u32					revision_max;
	struct regulator_ops			*ops;
	struct spmi_voltage_set_points		*set_points;
	int					hpm_min_load;
};

struct spmi_regulator_data {
	const char			*name;
	u16				base;
	const char			*supply;
	const char			*ocp;
	u16				force_type;
};

#define SPMI_VREG(_type, _subtype, _dig_major_min, _dig_major_max, \
		      _logical_type, _ops_val, _set_points_val, _hpm_min_load) \
	{ \
		.type		= SPMI_REGULATOR_TYPE_##_type, \
		.subtype	= SPMI_REGULATOR_SUBTYPE_##_subtype, \
		.revision_min	= _dig_major_min, \
		.revision_max	= _dig_major_max, \
		.logical_type	= SPMI_REGULATOR_LOGICAL_TYPE_##_logical_type, \
		.ops		= &spmi_##_ops_val##_ops, \
		.set_points	= &_set_points_val##_set_points, \
		.hpm_min_load	= _hpm_min_load, \
	}

#define SPMI_VREG_VS(_subtype, _dig_major_min, _dig_major_max) \
	{ \
		.type		= SPMI_REGULATOR_TYPE_VS, \
		.subtype	= SPMI_REGULATOR_SUBTYPE_##_subtype, \
		.revision_min	= _dig_major_min, \
		.revision_max	= _dig_major_max, \
		.logical_type	= SPMI_REGULATOR_LOGICAL_TYPE_VS, \
		.ops		= &spmi_vs_ops, \
	}

#define SPMI_VOLTAGE_RANGE(_range_sel, _min_uV, _set_point_min_uV, \
			_set_point_max_uV, _max_uV, _step_uV) \
	{ \
		.min_uV			= _min_uV, \
		.max_uV			= _max_uV, \
		.set_point_min_uV	= _set_point_min_uV, \
		.set_point_max_uV	= _set_point_max_uV, \
		.step_uV		= _step_uV, \
		.range_sel		= _range_sel, \
	}

#define DEFINE_SPMI_SET_POINTS(name) \
struct spmi_voltage_set_points name##_set_points = { \
	.range	= name##_ranges, \
	.count	= ARRAY_SIZE(name##_ranges), \
}

/*
 * These tables contain the physically available PMIC regulator voltage setpoint
 * ranges.  Where two ranges overlap in hardware, one of the ranges is trimmed
 * to ensure that the setpoints available to software are monotonically
 * increasing and unique.  The set_voltage callback functions expect these
 * properties to hold.
 */
static struct spmi_voltage_range pldo_ranges[] = {
	SPMI_VOLTAGE_RANGE(2,  750000,  750000, 1537500, 1537500, 12500),
	SPMI_VOLTAGE_RANGE(3, 1500000, 1550000, 3075000, 3075000, 25000),
	SPMI_VOLTAGE_RANGE(4, 1750000, 3100000, 4900000, 4900000, 50000),
};

static struct spmi_voltage_range nldo1_ranges[] = {
	SPMI_VOLTAGE_RANGE(2,  750000,  750000, 1537500, 1537500, 12500),
};

static struct spmi_voltage_range nldo2_ranges[] = {
	SPMI_VOLTAGE_RANGE(0,  375000,       0,       0, 1537500, 12500),
	SPMI_VOLTAGE_RANGE(1,  375000,  375000,  768750,  768750,  6250),
	SPMI_VOLTAGE_RANGE(2,  750000,  775000, 1537500, 1537500, 12500),
};

static struct spmi_voltage_range nldo3_ranges[] = {
	SPMI_VOLTAGE_RANGE(0,  375000,  375000, 1537500, 1537500, 12500),
	SPMI_VOLTAGE_RANGE(1,  375000,       0,       0, 1537500, 12500),
	SPMI_VOLTAGE_RANGE(2,  750000,       0,       0, 1537500, 12500),
};

static struct spmi_voltage_range ln_ldo_ranges[] = {
	SPMI_VOLTAGE_RANGE(1,  690000,  690000, 1110000, 1110000, 60000),
	SPMI_VOLTAGE_RANGE(0, 1380000, 1380000, 2220000, 2220000, 120000),
};

static struct spmi_voltage_range smps_ranges[] = {
	SPMI_VOLTAGE_RANGE(0,  375000,  375000, 1562500, 1562500, 12500),
	SPMI_VOLTAGE_RANGE(1, 1550000, 1575000, 3125000, 3125000, 25000),
};

static struct spmi_voltage_range ftsmps_ranges[] = {
	SPMI_VOLTAGE_RANGE(0,       0,  350000, 1275000, 1275000,  5000),
	SPMI_VOLTAGE_RANGE(1,       0, 1280000, 2040000, 2040000, 10000),
};

static struct spmi_voltage_range ftsmps2p5_ranges[] = {
	SPMI_VOLTAGE_RANGE(0,   80000,  350000, 1355000, 1355000,  5000),
	SPMI_VOLTAGE_RANGE(1,  160000, 1360000, 2200000, 2200000, 10000),
};

static struct spmi_voltage_range boost_ranges[] = {
	SPMI_VOLTAGE_RANGE(0, 4000000, 4000000, 5550000, 5550000, 50000),
};

static struct spmi_voltage_range boost_byp_ranges[] = {
	SPMI_VOLTAGE_RANGE(0, 2500000, 2500000, 5200000, 5650000, 50000),
};

static struct spmi_voltage_range ult_lo_smps_ranges[] = {
	SPMI_VOLTAGE_RANGE(0,  375000,  375000, 1562500, 1562500, 12500),
	SPMI_VOLTAGE_RANGE(1,  750000,       0,       0, 1525000, 25000),
};

static struct spmi_voltage_range ult_ho_smps_ranges[] = {
	SPMI_VOLTAGE_RANGE(0, 1550000, 1550000, 2325000, 2325000, 25000),
};

static struct spmi_voltage_range ult_nldo_ranges[] = {
	SPMI_VOLTAGE_RANGE(0,  375000,  375000, 1537500, 1537500, 12500),
};

static struct spmi_voltage_range ult_pldo_ranges[] = {
	SPMI_VOLTAGE_RANGE(0, 1750000, 1750000, 3337500, 3337500, 12500),
};

static DEFINE_SPMI_SET_POINTS(pldo);
static DEFINE_SPMI_SET_POINTS(nldo1);
static DEFINE_SPMI_SET_POINTS(nldo2);
static DEFINE_SPMI_SET_POINTS(nldo3);
static DEFINE_SPMI_SET_POINTS(ln_ldo);
static DEFINE_SPMI_SET_POINTS(smps);
static DEFINE_SPMI_SET_POINTS(ftsmps);
static DEFINE_SPMI_SET_POINTS(ftsmps2p5);
static DEFINE_SPMI_SET_POINTS(boost);
static DEFINE_SPMI_SET_POINTS(boost_byp);
static DEFINE_SPMI_SET_POINTS(ult_lo_smps);
static DEFINE_SPMI_SET_POINTS(ult_ho_smps);
static DEFINE_SPMI_SET_POINTS(ult_nldo);
static DEFINE_SPMI_SET_POINTS(ult_pldo);

static inline int spmi_vreg_read(struct spmi_regulator *vreg, u16 addr, u8 *buf,
				 int len)
{
	return regmap_bulk_read(vreg->regmap, vreg->base + addr, buf, len);
}

static inline int spmi_vreg_write(struct spmi_regulator *vreg, u16 addr,
				u8 *buf, int len)
{
	return regmap_bulk_write(vreg->regmap, vreg->base + addr, buf, len);
}

static int spmi_vreg_update_bits(struct spmi_regulator *vreg, u16 addr, u8 val,
		u8 mask)
{
	return regmap_update_bits(vreg->regmap, vreg->base + addr, mask, val);
}

static int spmi_regulator_common_is_enabled(struct regulator_dev *rdev)
{
	struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
	u8 reg;

	spmi_vreg_read(vreg, SPMI_COMMON_REG_ENABLE, &reg, 1);

	return (reg & SPMI_COMMON_ENABLE_MASK) == SPMI_COMMON_ENABLE;
}

static int spmi_regulator_common_enable(struct regulator_dev *rdev)
{
	struct spmi_regulator *vreg = rdev_get_drvdata(rdev);

	return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_ENABLE,
		SPMI_COMMON_ENABLE, SPMI_COMMON_ENABLE_MASK);
}

static int spmi_regulator_vs_enable(struct regulator_dev *rdev)
{
	struct spmi_regulator *vreg = rdev_get_drvdata(rdev);

	if (vreg->ocp_irq) {
		vreg->ocp_count = 0;
		vreg->vs_enable_time = ktime_get();
	}

	return spmi_regulator_common_enable(rdev);
}

static int spmi_regulator_vs_ocp(struct regulator_dev *rdev)
{
	struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
	u8 reg = SPMI_VS_OCP_OVERRIDE;

	return spmi_vreg_write(vreg, SPMI_VS_REG_OCP, &reg, 1);
}

static int spmi_regulator_common_disable(struct regulator_dev *rdev)
{
	struct spmi_regulator *vreg = rdev_get_drvdata(rdev);

	return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_ENABLE,
		SPMI_COMMON_DISABLE, SPMI_COMMON_ENABLE_MASK);
}

static int spmi_regulator_select_voltage(struct spmi_regulator *vreg,
					 int min_uV, int max_uV)
{
	const struct spmi_voltage_range *range;
	int uV = min_uV;
	int lim_min_uV, lim_max_uV, i, range_id, range_max_uV;
	int selector, voltage_sel;

	/* Check if request voltage is outside of physically settable range. */
	lim_min_uV = vreg->set_points->range[0].set_point_min_uV;
	lim_max_uV =
	  vreg->set_points->range[vreg->set_points->count - 1].set_point_max_uV;

	if (uV < lim_min_uV && max_uV >= lim_min_uV)
		uV = lim_min_uV;

	if (uV < lim_min_uV || uV > lim_max_uV) {
		dev_err(vreg->dev,
			"request v=[%d, %d] is outside possible v=[%d, %d]\n",
			 min_uV, max_uV, lim_min_uV, lim_max_uV);
		return -EINVAL;
	}

	/* Find the range which uV is inside of. */
	for (i = vreg->set_points->count - 1; i > 0; i--) {
		range_max_uV = vreg->set_points->range[i - 1].set_point_max_uV;
		if (uV > range_max_uV && range_max_uV > 0)
			break;
	}

	range_id = i;
	range = &vreg->set_points->range[range_id];

	/*
	 * Force uV to be an allowed set point by applying a ceiling function to
	 * the uV value.
	 */
	voltage_sel = DIV_ROUND_UP(uV - range->min_uV, range->step_uV);
	uV = voltage_sel * range->step_uV + range->min_uV;

	if (uV > max_uV) {
		dev_err(vreg->dev,
			"request v=[%d, %d] cannot be met by any set point; "
			"next set point: %d\n",
			min_uV, max_uV, uV);
		return -EINVAL;
	}

	selector = 0;
	for (i = 0; i < range_id; i++)
		selector += vreg->set_points->range[i].n_voltages;
	selector += (uV - range->set_point_min_uV) / range->step_uV;

	return selector;
}

static int spmi_sw_selector_to_hw(struct spmi_regulator *vreg,
				  unsigned selector, u8 *range_sel,
				  u8 *voltage_sel)
{
	const struct spmi_voltage_range *range, *end;

	range = vreg->set_points->range;
	end = range + vreg->set_points->count;

	for (; range < end; range++) {
		if (selector < range->n_voltages) {
			*voltage_sel = selector;
			*range_sel = range->range_sel;
			return 0;
		}

		selector -= range->n_voltages;
	}

	return -EINVAL;
}

static int spmi_hw_selector_to_sw(struct spmi_regulator *vreg, u8 hw_sel,
				  const struct spmi_voltage_range *range)
{
	int sw_sel = hw_sel;
	const struct spmi_voltage_range *r = vreg->set_points->range;

	while (r != range) {
		sw_sel += r->n_voltages;
		r++;
	}

	return sw_sel;
}

static const struct spmi_voltage_range *
spmi_regulator_find_range(struct spmi_regulator *vreg)
{
	u8 range_sel;
	const struct spmi_voltage_range *range, *end;

	range = vreg->set_points->range;
	end = range + vreg->set_points->count;

	spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_RANGE, &range_sel, 1);

	for (; range < end; range++)
		if (range->range_sel == range_sel)
			return range;

	return NULL;
}

static int spmi_regulator_select_voltage_same_range(struct spmi_regulator *vreg,
		int min_uV, int max_uV)
{
	const struct spmi_voltage_range *range;
	int uV = min_uV;
	int i, selector;

	range = spmi_regulator_find_range(vreg);
	if (!range)
		goto different_range;

	if (uV < range->min_uV && max_uV >= range->min_uV)
		uV = range->min_uV;

	if (uV < range->min_uV || uV > range->max_uV) {
		/* Current range doesn't support the requested voltage. */
		goto different_range;
	}

	/*
	 * Force uV to be an allowed set point by applying a ceiling function to
	 * the uV value.
	 */
	uV = DIV_ROUND_UP(uV - range->min_uV, range->step_uV);
	uV = uV * range->step_uV + range->min_uV;

	if (uV > max_uV) {
		/*
		 * No set point in the current voltage range is within the
		 * requested min_uV to max_uV range.
		 */
		goto different_range;
	}

	selector = 0;
	for (i = 0; i < vreg->set_points->count; i++) {
		if (uV >= vreg->set_points->range[i].set_point_min_uV
		    && uV <= vreg->set_points->range[i].set_point_max_uV) {
			selector +=
			    (uV - vreg->set_points->range[i].set_point_min_uV)
				/ vreg->set_points->range[i].step_uV;
			break;
		}

		selector += vreg->set_points->range[i].n_voltages;
	}

	if (selector >= vreg->set_points->n_voltages)
		goto different_range;

	return selector;

different_range:
	return spmi_regulator_select_voltage(vreg, min_uV, max_uV);
}

static int spmi_regulator_common_map_voltage(struct regulator_dev *rdev,
					     int min_uV, int max_uV)
{
	struct spmi_regulator *vreg = rdev_get_drvdata(rdev);

	/*
	 * Favor staying in the current voltage range if possible.  This avoids
	 * voltage spikes that occur when changing the voltage range.
	 */
	return spmi_regulator_select_voltage_same_range(vreg, min_uV, max_uV);
}

static int
spmi_regulator_common_set_voltage(struct regulator_dev *rdev, unsigned selector)
{
	struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
	int ret;
	u8 buf[2];
	u8 range_sel, voltage_sel;

	ret = spmi_sw_selector_to_hw(vreg, selector, &range_sel, &voltage_sel);
	if (ret)
		return ret;

	buf[0] = range_sel;
	buf[1] = voltage_sel;
	return spmi_vreg_write(vreg, SPMI_COMMON_REG_VOLTAGE_RANGE, buf, 2);
}

static int spmi_regulator_set_voltage_time_sel(struct regulator_dev *rdev,
		unsigned int old_selector, unsigned int new_selector)
{
	struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
	const struct spmi_voltage_range *range;
	int diff_uV;

	range = spmi_regulator_find_range(vreg);
	if (!range)
		return -EINVAL;

	diff_uV = abs(new_selector - old_selector) * range->step_uV;

	return DIV_ROUND_UP(diff_uV, vreg->slew_rate);
}

static int spmi_regulator_common_get_voltage(struct regulator_dev *rdev)
{
	struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
	const struct spmi_voltage_range *range;
	u8 voltage_sel;

	spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_SET, &voltage_sel, 1);

	range = spmi_regulator_find_range(vreg);
	if (!range)
		return -EINVAL;

	return spmi_hw_selector_to_sw(vreg, voltage_sel, range);
}

static int spmi_regulator_single_map_voltage(struct regulator_dev *rdev,
		int min_uV, int max_uV)
{
	struct spmi_regulator *vreg = rdev_get_drvdata(rdev);

	return spmi_regulator_select_voltage(vreg, min_uV, max_uV);
}

static int spmi_regulator_single_range_set_voltage(struct regulator_dev *rdev,
						   unsigned selector)
{
	struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
	u8 sel = selector;

	/*
	 * Certain types of regulators do not have a range select register so
	 * only voltage set register needs to be written.
	 */
	return spmi_vreg_write(vreg, SPMI_COMMON_REG_VOLTAGE_SET, &sel, 1);
}

static int spmi_regulator_single_range_get_voltage(struct regulator_dev *rdev)
{
	struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
	u8 selector;
	int ret;

	ret = spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_SET, &selector, 1);
	if (ret)
		return ret;

	return selector;
}

static int spmi_regulator_ult_lo_smps_set_voltage(struct regulator_dev *rdev,
						  unsigned selector)
{
	struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
	int ret;
	u8 range_sel, voltage_sel;

	ret = spmi_sw_selector_to_hw(vreg, selector, &range_sel, &voltage_sel);
	if (ret)
		return ret;

	/*
	 * Calculate VSET based on range
	 * In case of range 0: voltage_sel is a 7 bit value, can be written
	 *			witout any modification.
	 * In case of range 1: voltage_sel is a 5 bit value, bits[7-5] set to
	 *			[011].
	 */
	if (range_sel == 1)
		voltage_sel |= ULT_SMPS_RANGE_SPLIT;

	return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_VOLTAGE_SET,
				     voltage_sel, 0xff);
}

static int spmi_regulator_ult_lo_smps_get_voltage(struct regulator_dev *rdev)
{
	struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
	const struct spmi_voltage_range *range;
	u8 voltage_sel;

	spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_SET, &voltage_sel, 1);

	range = spmi_regulator_find_range(vreg);
	if (!range)
		return -EINVAL;

	if (range->range_sel == 1)
		voltage_sel &= ~ULT_SMPS_RANGE_SPLIT;

	return spmi_hw_selector_to_sw(vreg, voltage_sel, range);
}

static int spmi_regulator_common_list_voltage(struct regulator_dev *rdev,
			unsigned selector)
{
	struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
	int uV = 0;
	int i;

	if (selector >= vreg->set_points->n_voltages)
		return 0;

	for (i = 0; i < vreg->set_points->count; i++) {
		if (selector < vreg->set_points->range[i].n_voltages) {
			uV = selector * vreg->set_points->range[i].step_uV
				+ vreg->set_points->range[i].set_point_min_uV;
			break;
		}

		selector -= vreg->set_points->range[i].n_voltages;
	}

	return uV;
}

static int
spmi_regulator_common_set_bypass(struct regulator_dev *rdev, bool enable)
{
	struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
	u8 mask = SPMI_COMMON_MODE_BYPASS_MASK;
	u8 val = 0;

	if (enable)
		val = mask;

	return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_MODE, val, mask);
}

static int
spmi_regulator_common_get_bypass(struct regulator_dev *rdev, bool *enable)
{
	struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
	u8 val;
	int ret;

	ret = spmi_vreg_read(vreg, SPMI_COMMON_REG_MODE, &val, 1);
	*enable = val & SPMI_COMMON_MODE_BYPASS_MASK;

	return ret;
}

static unsigned int spmi_regulator_common_get_mode(struct regulator_dev *rdev)
{
	struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
	u8 reg;

	spmi_vreg_read(vreg, SPMI_COMMON_REG_MODE, &reg, 1);

	if (reg & SPMI_COMMON_MODE_HPM_MASK)
		return REGULATOR_MODE_NORMAL;

	if (reg & SPMI_COMMON_MODE_AUTO_MASK)
		return REGULATOR_MODE_FAST;

	return REGULATOR_MODE_IDLE;
}

static int
spmi_regulator_common_set_mode(struct regulator_dev *rdev, unsigned int mode)
{
	struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
	u8 mask = SPMI_COMMON_MODE_HPM_MASK | SPMI_COMMON_MODE_AUTO_MASK;
	u8 val = 0;

	if (mode == REGULATOR_MODE_NORMAL)
		val = SPMI_COMMON_MODE_HPM_MASK;
	else if (mode == REGULATOR_MODE_FAST)
		val = SPMI_COMMON_MODE_AUTO_MASK;

	return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_MODE, val, mask);
}

static int
spmi_regulator_common_set_load(struct regulator_dev *rdev, int load_uA)
{
	struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
	unsigned int mode;

	if (load_uA >= vreg->hpm_min_load)
		mode = REGULATOR_MODE_NORMAL;
	else
		mode = REGULATOR_MODE_IDLE;

	return spmi_regulator_common_set_mode(rdev, mode);
}

static int spmi_regulator_common_set_pull_down(struct regulator_dev *rdev)
{
	struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
	unsigned int mask = SPMI_COMMON_PULL_DOWN_ENABLE_MASK;

	return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_PULL_DOWN,
				     mask, mask);
}

static int spmi_regulator_common_set_soft_start(struct regulator_dev *rdev)
{
	struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
	unsigned int mask = SPMI_LDO_SOFT_START_ENABLE_MASK;

	return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_SOFT_START,
				     mask, mask);
}

static int spmi_regulator_set_ilim(struct regulator_dev *rdev, int ilim_uA)
{
	struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
	enum spmi_regulator_logical_type type = vreg->logical_type;
	unsigned int current_reg;
	u8 reg;
	u8 mask = SPMI_BOOST_CURRENT_LIMIT_MASK |
		  SPMI_BOOST_CURRENT_LIMIT_ENABLE_MASK;
	int max = (SPMI_BOOST_CURRENT_LIMIT_MASK + 1) * 500;

	if (type == SPMI_REGULATOR_LOGICAL_TYPE_BOOST)
		current_reg = SPMI_BOOST_REG_CURRENT_LIMIT;
	else
		current_reg = SPMI_BOOST_BYP_REG_CURRENT_LIMIT;

	if (ilim_uA > max || ilim_uA <= 0)
		return -EINVAL;

	reg = (ilim_uA - 1) / 500;
	reg |= SPMI_BOOST_CURRENT_LIMIT_ENABLE_MASK;

	return spmi_vreg_update_bits(vreg, current_reg, reg, mask);
}

static int spmi_regulator_vs_clear_ocp(struct spmi_regulator *vreg)
{
	int ret;

	ret = spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_ENABLE,
		SPMI_COMMON_DISABLE, SPMI_COMMON_ENABLE_MASK);

	vreg->vs_enable_time = ktime_get();

	ret = spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_ENABLE,
		SPMI_COMMON_ENABLE, SPMI_COMMON_ENABLE_MASK);

	return ret;
}

static void spmi_regulator_vs_ocp_work(struct work_struct *work)
{
	struct delayed_work *dwork = to_delayed_work(work);
	struct spmi_regulator *vreg
		= container_of(dwork, struct spmi_regulator, ocp_work);

	spmi_regulator_vs_clear_ocp(vreg);
}

static irqreturn_t spmi_regulator_vs_ocp_isr(int irq, void *data)
{
	struct spmi_regulator *vreg = data;
	ktime_t ocp_irq_time;
	s64 ocp_trigger_delay_us;

	ocp_irq_time = ktime_get();
	ocp_trigger_delay_us = ktime_us_delta(ocp_irq_time,
						vreg->vs_enable_time);

	/*
	 * Reset the OCP count if there is a large delay between switch enable
	 * and when OCP triggers.  This is indicative of a hotplug event as
	 * opposed to a fault.
	 */
	if (ocp_trigger_delay_us > SPMI_VS_OCP_FAULT_DELAY_US)
		vreg->ocp_count = 0;

	/* Wait for switch output to settle back to 0 V after OCP triggered. */
	udelay(SPMI_VS_OCP_FALL_DELAY_US);

	vreg->ocp_count++;

	if (vreg->ocp_count == 1) {
		/* Immediately clear the over current condition. */
		spmi_regulator_vs_clear_ocp(vreg);
	} else if (vreg->ocp_count <= vreg->ocp_max_retries) {
		/* Schedule the over current clear task to run later. */
		schedule_delayed_work(&vreg->ocp_work,
			msecs_to_jiffies(vreg->ocp_retry_delay_ms) + 1);
	} else {
		dev_err(vreg->dev,
			"OCP triggered %d times; no further retries\n",
			vreg->ocp_count);
	}

	return IRQ_HANDLED;
}

static struct regulator_ops spmi_smps_ops = {
	.enable			= spmi_regulator_common_enable,
	.disable		= spmi_regulator_common_disable,
	.is_enabled		= spmi_regulator_common_is_enabled,
	.set_voltage_sel	= spmi_regulator_common_set_voltage,
	.set_voltage_time_sel	= spmi_regulator_set_voltage_time_sel,
	.get_voltage_sel	= spmi_regulator_common_get_voltage,
	.map_voltage		= spmi_regulator_common_map_voltage,
	.list_voltage		= spmi_regulator_common_list_voltage,
	.set_mode		= spmi_regulator_common_set_mode,
	.get_mode		= spmi_regulator_common_get_mode,
	.set_load		= spmi_regulator_common_set_load,
	.set_pull_down		= spmi_regulator_common_set_pull_down,
};

static struct regulator_ops spmi_ldo_ops = {
	.enable			= spmi_regulator_common_enable,
	.disable		= spmi_regulator_common_disable,
	.is_enabled		= spmi_regulator_common_is_enabled,
	.set_voltage_sel	= spmi_regulator_common_set_voltage,
	.get_voltage_sel	= spmi_regulator_common_get_voltage,
	.map_voltage		= spmi_regulator_common_map_voltage,
	.list_voltage		= spmi_regulator_common_list_voltage,
	.set_mode		= spmi_regulator_common_set_mode,
	.get_mode		= spmi_regulator_common_get_mode,
	.set_load		= spmi_regulator_common_set_load,
	.set_bypass		= spmi_regulator_common_set_bypass,
	.get_bypass		= spmi_regulator_common_get_bypass,
	.set_pull_down		= spmi_regulator_common_set_pull_down,
	.set_soft_start		= spmi_regulator_common_set_soft_start,
};

static struct regulator_ops spmi_ln_ldo_ops = {
	.enable			= spmi_regulator_common_enable,
	.disable		= spmi_regulator_common_disable,
	.is_enabled		= spmi_regulator_common_is_enabled,
	.set_voltage_sel	= spmi_regulator_common_set_voltage,
	.get_voltage_sel	= spmi_regulator_common_get_voltage,
	.map_voltage		= spmi_regulator_common_map_voltage,
	.list_voltage		= spmi_regulator_common_list_voltage,
	.set_bypass		= spmi_regulator_common_set_bypass,
	.get_bypass		= spmi_regulator_common_get_bypass,
};

static struct regulator_ops spmi_vs_ops = {
	.enable			= spmi_regulator_vs_enable,
	.disable		= spmi_regulator_common_disable,
	.is_enabled		= spmi_regulator_common_is_enabled,
	.set_pull_down		= spmi_regulator_common_set_pull_down,
	.set_soft_start		= spmi_regulator_common_set_soft_start,
	.set_over_current_protection = spmi_regulator_vs_ocp,
	.set_mode		= spmi_regulator_common_set_mode,
	.get_mode		= spmi_regulator_common_get_mode,
};

static struct regulator_ops spmi_boost_ops = {
	.enable			= spmi_regulator_common_enable,
	.disable		= spmi_regulator_common_disable,
	.is_enabled		= spmi_regulator_common_is_enabled,
	.set_voltage_sel	= spmi_regulator_single_range_set_voltage,
	.get_voltage_sel	= spmi_regulator_single_range_get_voltage,
	.map_voltage		= spmi_regulator_single_map_voltage,
	.list_voltage		= spmi_regulator_common_list_voltage,
	.set_input_current_limit = spmi_regulator_set_ilim,
};

static struct regulator_ops spmi_ftsmps_ops = {
	.enable			= spmi_regulator_common_enable,
	.disable		= spmi_regulator_common_disable,
	.is_enabled		= spmi_regulator_common_is_enabled,
	.set_voltage_sel	= spmi_regulator_common_set_voltage,
	.set_voltage_time_sel	= spmi_regulator_set_voltage_time_sel,
	.get_voltage_sel	= spmi_regulator_common_get_voltage,
	.map_voltage		= spmi_regulator_common_map_voltage,
	.list_voltage		= spmi_regulator_common_list_voltage,
	.set_mode		= spmi_regulator_common_set_mode,
	.get_mode		= spmi_regulator_common_get_mode,
	.set_load		= spmi_regulator_common_set_load,
	.set_pull_down		= spmi_regulator_common_set_pull_down,
};

static struct regulator_ops spmi_ult_lo_smps_ops = {
	.enable			= spmi_regulator_common_enable,
	.disable		= spmi_regulator_common_disable,
	.is_enabled		= spmi_regulator_common_is_enabled,
	.set_voltage_sel	= spmi_regulator_ult_lo_smps_set_voltage,
	.set_voltage_time_sel	= spmi_regulator_set_voltage_time_sel,
	.get_voltage_sel	= spmi_regulator_ult_lo_smps_get_voltage,
	.list_voltage		= spmi_regulator_common_list_voltage,
	.set_mode		= spmi_regulator_common_set_mode,
	.get_mode		= spmi_regulator_common_get_mode,
	.set_load		= spmi_regulator_common_set_load,
	.set_pull_down		= spmi_regulator_common_set_pull_down,
};

static struct regulator_ops spmi_ult_ho_smps_ops = {
	.enable			= spmi_regulator_common_enable,
	.disable		= spmi_regulator_common_disable,
	.is_enabled		= spmi_regulator_common_is_enabled,
	.set_voltage_sel	= spmi_regulator_single_range_set_voltage,
	.set_voltage_time_sel	= spmi_regulator_set_voltage_time_sel,
	.get_voltage_sel	= spmi_regulator_single_range_get_voltage,
	.map_voltage		= spmi_regulator_single_map_voltage,
	.list_voltage		= spmi_regulator_common_list_voltage,
	.set_mode		= spmi_regulator_common_set_mode,
	.get_mode		= spmi_regulator_common_get_mode,
	.set_load		= spmi_regulator_common_set_load,
	.set_pull_down		= spmi_regulator_common_set_pull_down,
};

static struct regulator_ops spmi_ult_ldo_ops = {
	.enable			= spmi_regulator_common_enable,
	.disable		= spmi_regulator_common_disable,
	.is_enabled		= spmi_regulator_common_is_enabled,
	.set_voltage_sel	= spmi_regulator_single_range_set_voltage,
	.get_voltage_sel	= spmi_regulator_single_range_get_voltage,
	.map_voltage		= spmi_regulator_single_map_voltage,
	.list_voltage		= spmi_regulator_common_list_voltage,
	.set_mode		= spmi_regulator_common_set_mode,
	.get_mode		= spmi_regulator_common_get_mode,
	.set_load		= spmi_regulator_common_set_load,
	.set_bypass		= spmi_regulator_common_set_bypass,
	.get_bypass		= spmi_regulator_common_get_bypass,
	.set_pull_down		= spmi_regulator_common_set_pull_down,
	.set_soft_start		= spmi_regulator_common_set_soft_start,
};

/* Maximum possible digital major revision value */
#define INF 0xFF

static const struct spmi_regulator_mapping supported_regulators[] = {
	/*           type subtype dig_min dig_max ltype ops setpoints hpm_min */
	SPMI_VREG(BUCK,  GP_CTL,   0, INF, SMPS,   smps,   smps,   100000),
	SPMI_VREG(LDO,   N300,     0, INF, LDO,    ldo,    nldo1,   10000),
	SPMI_VREG(LDO,   N600,     0,   0, LDO,    ldo,    nldo2,   10000),
	SPMI_VREG(LDO,   N1200,    0,   0, LDO,    ldo,    nldo2,   10000),
	SPMI_VREG(LDO,   N600,     1, INF, LDO,    ldo,    nldo3,   10000),
	SPMI_VREG(LDO,   N1200,    1, INF, LDO,    ldo,    nldo3,   10000),
	SPMI_VREG(LDO,   N600_ST,  0,   0, LDO,    ldo,    nldo2,   10000),
	SPMI_VREG(LDO,   N1200_ST, 0,   0, LDO,    ldo,    nldo2,   10000),
	SPMI_VREG(LDO,   N600_ST,  1, INF, LDO,    ldo,    nldo3,   10000),
	SPMI_VREG(LDO,   N1200_ST, 1, INF, LDO,    ldo,    nldo3,   10000),
	SPMI_VREG(LDO,   P50,      0, INF, LDO,    ldo,    pldo,     5000),
	SPMI_VREG(LDO,   P150,     0, INF, LDO,    ldo,    pldo,    10000),
	SPMI_VREG(LDO,   P300,     0, INF, LDO,    ldo,    pldo,    10000),
	SPMI_VREG(LDO,   P600,     0, INF, LDO,    ldo,    pldo,    10000),
	SPMI_VREG(LDO,   P1200,    0, INF, LDO,    ldo,    pldo,    10000),
	SPMI_VREG(LDO,   LN,       0, INF, LN_LDO, ln_ldo, ln_ldo,      0),
	SPMI_VREG(LDO,   LV_P50,   0, INF, LDO,    ldo,    pldo,     5000),
	SPMI_VREG(LDO,   LV_P150,  0, INF, LDO,    ldo,    pldo,    10000),
	SPMI_VREG(LDO,   LV_P300,  0, INF, LDO,    ldo,    pldo,    10000),
	SPMI_VREG(LDO,   LV_P600,  0, INF, LDO,    ldo,    pldo,    10000),
	SPMI_VREG(LDO,   LV_P1200, 0, INF, LDO,    ldo,    pldo,    10000),
	SPMI_VREG_VS(LV100,        0, INF),
	SPMI_VREG_VS(LV300,        0, INF),
	SPMI_VREG_VS(MV300,        0, INF),
	SPMI_VREG_VS(MV500,        0, INF),
	SPMI_VREG_VS(HDMI,         0, INF),
	SPMI_VREG_VS(OTG,          0, INF),
	SPMI_VREG(BOOST, 5V_BOOST, 0, INF, BOOST,  boost,  boost,       0),
	SPMI_VREG(FTS,   FTS_CTL,  0, INF, FTSMPS, ftsmps, ftsmps, 100000),
	SPMI_VREG(FTS, FTS2p5_CTL, 0, INF, FTSMPS, ftsmps, ftsmps2p5, 100000),
	SPMI_VREG(BOOST_BYP, BB_2A, 0, INF, BOOST_BYP, boost, boost_byp, 0),
	SPMI_VREG(ULT_BUCK, ULT_HF_CTL1, 0, INF, ULT_LO_SMPS, ult_lo_smps,
						ult_lo_smps,   100000),
	SPMI_VREG(ULT_BUCK, ULT_HF_CTL2, 0, INF, ULT_LO_SMPS, ult_lo_smps,
						ult_lo_smps,   100000),
	SPMI_VREG(ULT_BUCK, ULT_HF_CTL3, 0, INF, ULT_LO_SMPS, ult_lo_smps,
						ult_lo_smps,   100000),
	SPMI_VREG(ULT_BUCK, ULT_HF_CTL4, 0, INF, ULT_HO_SMPS, ult_ho_smps,
						ult_ho_smps,   100000),
	SPMI_VREG(ULT_LDO, N300_ST, 0, INF, ULT_LDO, ult_ldo, ult_nldo, 10000),
	SPMI_VREG(ULT_LDO, N600_ST, 0, INF, ULT_LDO, ult_ldo, ult_nldo, 10000),
	SPMI_VREG(ULT_LDO, N900_ST, 0, INF, ULT_LDO, ult_ldo, ult_nldo, 10000),
	SPMI_VREG(ULT_LDO, N1200_ST, 0, INF, ULT_LDO, ult_ldo, ult_nldo, 10000),
	SPMI_VREG(ULT_LDO, LV_P150,  0, INF, ULT_LDO, ult_ldo, ult_pldo, 10000),
	SPMI_VREG(ULT_LDO, LV_P300,  0, INF, ULT_LDO, ult_ldo, ult_pldo, 10000),
	SPMI_VREG(ULT_LDO, LV_P450,  0, INF, ULT_LDO, ult_ldo, ult_pldo, 10000),
	SPMI_VREG(ULT_LDO, P600,     0, INF, ULT_LDO, ult_ldo, ult_pldo, 10000),
	SPMI_VREG(ULT_LDO, P150,     0, INF, ULT_LDO, ult_ldo, ult_pldo, 10000),
	SPMI_VREG(ULT_LDO, P50,     0, INF, ULT_LDO, ult_ldo, ult_pldo, 5000),
};

static void spmi_calculate_num_voltages(struct spmi_voltage_set_points *points)
{
	unsigned int n;
	struct spmi_voltage_range *range = points->range;

	for (; range < points->range + points->count; range++) {
		n = 0;
		if (range->set_point_max_uV) {
			n = range->set_point_max_uV - range->set_point_min_uV;
			n = (n / range->step_uV) + 1;
		}
		range->n_voltages = n;
		points->n_voltages += n;
	}
}

static int spmi_regulator_match(struct spmi_regulator *vreg, u16 force_type)
{
	const struct spmi_regulator_mapping *mapping;
	int ret, i;
	u32 dig_major_rev;
	u8 version[SPMI_COMMON_REG_SUBTYPE - SPMI_COMMON_REG_DIG_MAJOR_REV + 1];
	u8 type, subtype;

	ret = spmi_vreg_read(vreg, SPMI_COMMON_REG_DIG_MAJOR_REV, version,
		ARRAY_SIZE(version));
	if (ret) {
		dev_dbg(vreg->dev, "could not read version registers\n");
		return ret;
	}
	dig_major_rev	= version[SPMI_COMMON_REG_DIG_MAJOR_REV
					- SPMI_COMMON_REG_DIG_MAJOR_REV];
	if (!force_type) {
		type		= version[SPMI_COMMON_REG_TYPE -
					  SPMI_COMMON_REG_DIG_MAJOR_REV];
		subtype		= version[SPMI_COMMON_REG_SUBTYPE -
					  SPMI_COMMON_REG_DIG_MAJOR_REV];
	} else {
		type = force_type >> 8;
		subtype = force_type;
	}

	for (i = 0; i < ARRAY_SIZE(supported_regulators); i++) {
		mapping = &supported_regulators[i];
		if (mapping->type == type && mapping->subtype == subtype
		    && mapping->revision_min <= dig_major_rev
		    && mapping->revision_max >= dig_major_rev)
			goto found;
	}

	dev_err(vreg->dev,
		"unsupported regulator: name=%s type=0x%02X, subtype=0x%02X, dig major rev=0x%02X\n",
		vreg->desc.name, type, subtype, dig_major_rev);

	return -ENODEV;

found:
	vreg->logical_type	= mapping->logical_type;
	vreg->set_points	= mapping->set_points;
	vreg->hpm_min_load	= mapping->hpm_min_load;
	vreg->desc.ops		= mapping->ops;

	if (mapping->set_points) {
		if (!mapping->set_points->n_voltages)
			spmi_calculate_num_voltages(mapping->set_points);
		vreg->desc.n_voltages = mapping->set_points->n_voltages;
	}

	return 0;
}

static int spmi_regulator_init_slew_rate(struct spmi_regulator *vreg)
{
	int ret;
	u8 reg = 0;
	int step, delay, slew_rate, step_delay;
	const struct spmi_voltage_range *range;

	ret = spmi_vreg_read(vreg, SPMI_COMMON_REG_STEP_CTRL, &reg, 1);
	if (ret) {
		dev_err(vreg->dev, "spmi read failed, ret=%d\n", ret);
		return ret;
	}

	range = spmi_regulator_find_range(vreg);
	if (!range)
		return -EINVAL;

	switch (vreg->logical_type) {
	case SPMI_REGULATOR_LOGICAL_TYPE_FTSMPS:
		step_delay = SPMI_FTSMPS_STEP_DELAY;
		break;
	default:
		step_delay = SPMI_DEFAULT_STEP_DELAY;
		break;
	}

	step = reg & SPMI_FTSMPS_STEP_CTRL_STEP_MASK;
	step >>= SPMI_FTSMPS_STEP_CTRL_STEP_SHIFT;

	delay = reg & SPMI_FTSMPS_STEP_CTRL_DELAY_MASK;
	delay >>= SPMI_FTSMPS_STEP_CTRL_DELAY_SHIFT;

	/* slew_rate has units of uV/us */
	slew_rate = SPMI_FTSMPS_CLOCK_RATE * range->step_uV * (1 << step);
	slew_rate /= 1000 * (step_delay << delay);
	slew_rate *= SPMI_FTSMPS_STEP_MARGIN_NUM;
	slew_rate /= SPMI_FTSMPS_STEP_MARGIN_DEN;

	/* Ensure that the slew rate is greater than 0 */
	vreg->slew_rate = max(slew_rate, 1);

	return ret;
}

static int spmi_regulator_init_registers(struct spmi_regulator *vreg,
				const struct spmi_regulator_init_data *data)
{
	int ret;
	enum spmi_regulator_logical_type type;
	u8 ctrl_reg[8], reg, mask;

	type = vreg->logical_type;

	ret = spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_RANGE, ctrl_reg, 8);
	if (ret)
		return ret;

	/* Set up enable pin control. */
	if ((type == SPMI_REGULATOR_LOGICAL_TYPE_SMPS
	     || type == SPMI_REGULATOR_LOGICAL_TYPE_LDO
	     || type == SPMI_REGULATOR_LOGICAL_TYPE_VS)
	    && !(data->pin_ctrl_enable
			& SPMI_REGULATOR_PIN_CTRL_ENABLE_HW_DEFAULT)) {
		ctrl_reg[SPMI_COMMON_IDX_ENABLE] &=
			~SPMI_COMMON_ENABLE_FOLLOW_ALL_MASK;
		ctrl_reg[SPMI_COMMON_IDX_ENABLE] |=
		    data->pin_ctrl_enable & SPMI_COMMON_ENABLE_FOLLOW_ALL_MASK;
	}

	/* Set up mode pin control. */
	if ((type == SPMI_REGULATOR_LOGICAL_TYPE_SMPS
	    || type == SPMI_REGULATOR_LOGICAL_TYPE_LDO)
		&& !(data->pin_ctrl_hpm
			& SPMI_REGULATOR_PIN_CTRL_HPM_HW_DEFAULT)) {
		ctrl_reg[SPMI_COMMON_IDX_MODE] &=
			~SPMI_COMMON_MODE_FOLLOW_ALL_MASK;
		ctrl_reg[SPMI_COMMON_IDX_MODE] |=
			data->pin_ctrl_hpm & SPMI_COMMON_MODE_FOLLOW_ALL_MASK;
	}

	if (type == SPMI_REGULATOR_LOGICAL_TYPE_VS
	   && !(data->pin_ctrl_hpm & SPMI_REGULATOR_PIN_CTRL_HPM_HW_DEFAULT)) {
		ctrl_reg[SPMI_COMMON_IDX_MODE] &=
			~SPMI_COMMON_MODE_FOLLOW_AWAKE_MASK;
		ctrl_reg[SPMI_COMMON_IDX_MODE] |=
		       data->pin_ctrl_hpm & SPMI_COMMON_MODE_FOLLOW_AWAKE_MASK;
	}

	if ((type == SPMI_REGULATOR_LOGICAL_TYPE_ULT_LO_SMPS
		|| type == SPMI_REGULATOR_LOGICAL_TYPE_ULT_HO_SMPS
		|| type == SPMI_REGULATOR_LOGICAL_TYPE_ULT_LDO)
		&& !(data->pin_ctrl_hpm
			& SPMI_REGULATOR_PIN_CTRL_HPM_HW_DEFAULT)) {
		ctrl_reg[SPMI_COMMON_IDX_MODE] &=
			~SPMI_COMMON_MODE_FOLLOW_AWAKE_MASK;
		ctrl_reg[SPMI_COMMON_IDX_MODE] |=
		       data->pin_ctrl_hpm & SPMI_COMMON_MODE_FOLLOW_AWAKE_MASK;
	}

	/* Write back any control register values that were modified. */
	ret = spmi_vreg_write(vreg, SPMI_COMMON_REG_VOLTAGE_RANGE, ctrl_reg, 8);
	if (ret)
		return ret;

	/* Set soft start strength and over current protection for VS. */
	if (type == SPMI_REGULATOR_LOGICAL_TYPE_VS) {
		if (data->vs_soft_start_strength
				!= SPMI_VS_SOFT_START_STR_HW_DEFAULT) {
			reg = data->vs_soft_start_strength
				& SPMI_VS_SOFT_START_SEL_MASK;
			mask = SPMI_VS_SOFT_START_SEL_MASK;
			return spmi_vreg_update_bits(vreg,
						     SPMI_VS_REG_SOFT_START,
						     reg, mask);
		}
	}

	return 0;
}

static void spmi_regulator_get_dt_config(struct spmi_regulator *vreg,
		struct device_node *node, struct spmi_regulator_init_data *data)
{
	/*
	 * Initialize configuration parameters to use hardware default in case
	 * no value is specified via device tree.
	 */
	data->pin_ctrl_enable	    = SPMI_REGULATOR_PIN_CTRL_ENABLE_HW_DEFAULT;
	data->pin_ctrl_hpm	    = SPMI_REGULATOR_PIN_CTRL_HPM_HW_DEFAULT;
	data->vs_soft_start_strength	= SPMI_VS_SOFT_START_STR_HW_DEFAULT;

	/* These bindings are optional, so it is okay if they aren't found. */
	of_property_read_u32(node, "qcom,ocp-max-retries",
		&vreg->ocp_max_retries);
	of_property_read_u32(node, "qcom,ocp-retry-delay",
		&vreg->ocp_retry_delay_ms);
	of_property_read_u32(node, "qcom,pin-ctrl-enable",
		&data->pin_ctrl_enable);
	of_property_read_u32(node, "qcom,pin-ctrl-hpm", &data->pin_ctrl_hpm);
	of_property_read_u32(node, "qcom,vs-soft-start-strength",
		&data->vs_soft_start_strength);
}

static unsigned int spmi_regulator_of_map_mode(unsigned int mode)
{
	if (mode == 1)
		return REGULATOR_MODE_NORMAL;
	if (mode == 2)
		return REGULATOR_MODE_FAST;

	return REGULATOR_MODE_IDLE;
}

static int spmi_regulator_of_parse(struct device_node *node,
			    const struct regulator_desc *desc,
			    struct regulator_config *config)
{
	struct spmi_regulator_init_data data = { };
	struct spmi_regulator *vreg = config->driver_data;
	struct device *dev = config->dev;
	int ret;

	spmi_regulator_get_dt_config(vreg, node, &data);

	if (!vreg->ocp_max_retries)
		vreg->ocp_max_retries = SPMI_VS_OCP_DEFAULT_MAX_RETRIES;
	if (!vreg->ocp_retry_delay_ms)
		vreg->ocp_retry_delay_ms = SPMI_VS_OCP_DEFAULT_RETRY_DELAY_MS;

	ret = spmi_regulator_init_registers(vreg, &data);
	if (ret) {
		dev_err(dev, "common initialization failed, ret=%d\n", ret);
		return ret;
	}

	switch (vreg->logical_type) {
	case SPMI_REGULATOR_LOGICAL_TYPE_FTSMPS:
	case SPMI_REGULATOR_LOGICAL_TYPE_ULT_LO_SMPS:
	case SPMI_REGULATOR_LOGICAL_TYPE_ULT_HO_SMPS:
	case SPMI_REGULATOR_LOGICAL_TYPE_SMPS:
		ret = spmi_regulator_init_slew_rate(vreg);
		if (ret)
			return ret;
	default:
		break;
	}

	if (vreg->logical_type != SPMI_REGULATOR_LOGICAL_TYPE_VS)
		vreg->ocp_irq = 0;

	if (vreg->ocp_irq) {
		ret = devm_request_irq(dev, vreg->ocp_irq,
			spmi_regulator_vs_ocp_isr, IRQF_TRIGGER_RISING, "ocp",
			vreg);
		if (ret < 0) {
			dev_err(dev, "failed to request irq %d, ret=%d\n",
				vreg->ocp_irq, ret);
			return ret;
		}

		INIT_DELAYED_WORK(&vreg->ocp_work, spmi_regulator_vs_ocp_work);
	}

	return 0;
}

static const struct spmi_regulator_data pm8941_regulators[] = {
	{ "s1", 0x1400, "vdd_s1", },
	{ "s2", 0x1700, "vdd_s2", },
	{ "s3", 0x1a00, "vdd_s3", },
	{ "s4", 0xa000, },
	{ "l1", 0x4000, "vdd_l1_l3", },
	{ "l2", 0x4100, "vdd_l2_lvs_1_2_3", },
	{ "l3", 0x4200, "vdd_l1_l3", },
	{ "l4", 0x4300, "vdd_l4_l11", },
	{ "l5", 0x4400, "vdd_l5_l7", NULL, 0x0410 },
	{ "l6", 0x4500, "vdd_l6_l12_l14_l15", },
	{ "l7", 0x4600, "vdd_l5_l7", NULL, 0x0410 },
	{ "l8", 0x4700, "vdd_l8_l16_l18_19", },
	{ "l9", 0x4800, "vdd_l9_l10_l17_l22", },
	{ "l10", 0x4900, "vdd_l9_l10_l17_l22", },
	{ "l11", 0x4a00, "vdd_l4_l11", },
	{ "l12", 0x4b00, "vdd_l6_l12_l14_l15", },
	{ "l13", 0x4c00, "vdd_l13_l20_l23_l24", },
	{ "l14", 0x4d00, "vdd_l6_l12_l14_l15", },
	{ "l15", 0x4e00, "vdd_l6_l12_l14_l15", },
	{ "l16", 0x4f00, "vdd_l8_l16_l18_19", },
	{ "l17", 0x5000, "vdd_l9_l10_l17_l22", },
	{ "l18", 0x5100, "vdd_l8_l16_l18_19", },
	{ "l19", 0x5200, "vdd_l8_l16_l18_19", },
	{ "l20", 0x5300, "vdd_l13_l20_l23_l24", },
	{ "l21", 0x5400, "vdd_l21", },
	{ "l22", 0x5500, "vdd_l9_l10_l17_l22", },
	{ "l23", 0x5600, "vdd_l13_l20_l23_l24", },
	{ "l24", 0x5700, "vdd_l13_l20_l23_l24", },
	{ "lvs1", 0x8000, "vdd_l2_lvs_1_2_3", },
	{ "lvs2", 0x8100, "vdd_l2_lvs_1_2_3", },
	{ "lvs3", 0x8200, "vdd_l2_lvs_1_2_3", },
	{ "5vs1", 0x8300, "vin_5vs", "ocp-5vs1", },
	{ "5vs2", 0x8400, "vin_5vs", "ocp-5vs2", },
	{ }
};

static const struct spmi_regulator_data pm8841_regulators[] = {
	{ "s1", 0x1400, "vdd_s1", },
	{ "s2", 0x1700, "vdd_s2", NULL, 0x1c08 },
	{ "s3", 0x1a00, "vdd_s3", },
	{ "s4", 0x1d00, "vdd_s4", NULL, 0x1c08 },
	{ "s5", 0x2000, "vdd_s5", NULL, 0x1c08 },
	{ "s6", 0x2300, "vdd_s6", NULL, 0x1c08 },
	{ "s7", 0x2600, "vdd_s7", NULL, 0x1c08 },
	{ "s8", 0x2900, "vdd_s8", NULL, 0x1c08 },
	{ }
};

static const struct spmi_regulator_data pm8916_regulators[] = {
	{ "s1", 0x1400, "vdd_s1", },
	{ "s2", 0x1700, "vdd_s2", },
	{ "s3", 0x1a00, "vdd_s3", },
	{ "s4", 0x1d00, "vdd_s4", },
	{ "l1", 0x4000, "vdd_l1_l3", },
	{ "l2", 0x4100, "vdd_l2", },
	{ "l3", 0x4200, "vdd_l1_l3", },
	{ "l4", 0x4300, "vdd_l4_l5_l6", },
	{ "l5", 0x4400, "vdd_l4_l5_l6", },
	{ "l6", 0x4500, "vdd_l4_l5_l6", },
	{ "l7", 0x4600, "vdd_l7", },
	{ "l8", 0x4700, "vdd_l8_l11_l14_l15_l16", },
	{ "l9", 0x4800, "vdd_l9_l10_l12_l13_l17_l18", },
	{ "l10", 0x4900, "vdd_l9_l10_l12_l13_l17_l18", },
	{ "l11", 0x4a00, "vdd_l8_l11_l14_l15_l16", },
	{ "l12", 0x4b00, "vdd_l9_l10_l12_l13_l17_l18", },
	{ "l13", 0x4c00, "vdd_l9_l10_l12_l13_l17_l18", },
	{ "l14", 0x4d00, "vdd_l8_l11_l14_l15_l16", },
	{ "l15", 0x4e00, "vdd_l8_l11_l14_l15_l16", },
	{ "l16", 0x4f00, "vdd_l8_l11_l14_l15_l16", },
	{ "l17", 0x5000, "vdd_l9_l10_l12_l13_l17_l18", },
	{ "l18", 0x5100, "vdd_l9_l10_l12_l13_l17_l18", },
	{ }
};

static const struct spmi_regulator_data pm8994_regulators[] = {
	{ "s1", 0x1400, "vdd_s1", },
	{ "s2", 0x1700, "vdd_s2", },
	{ "s3", 0x1a00, "vdd_s3", },
	{ "s4", 0x1d00, "vdd_s4", },
	{ "s5", 0x2000, "vdd_s5", },
	{ "s6", 0x2300, "vdd_s6", },
	{ "s7", 0x2600, "vdd_s7", },
	{ "s8", 0x2900, "vdd_s8", },
	{ "s9", 0x2c00, "vdd_s9", },
	{ "s10", 0x2f00, "vdd_s10", },
	{ "s11", 0x3200, "vdd_s11", },
	{ "s12", 0x3500, "vdd_s12", },
	{ "l1", 0x4000, "vdd_l1", },
	{ "l2", 0x4100, "vdd_l2_l26_l28", },
	{ "l3", 0x4200, "vdd_l3_l11", },
	{ "l4", 0x4300, "vdd_l4_l27_l31", },
	{ "l5", 0x4400, "vdd_l5_l7", },
	{ "l6", 0x4500, "vdd_l6_l12_l32", },
	{ "l7", 0x4600, "vdd_l5_l7", },
	{ "l8", 0x4700, "vdd_l8_l16_l30", },
	{ "l9", 0x4800, "vdd_l9_l10_l18_l22", },
	{ "l10", 0x4900, "vdd_l9_l10_l18_l22", },
	{ "l11", 0x4a00, "vdd_l3_l11", },
	{ "l12", 0x4b00, "vdd_l6_l12_l32", },
	{ "l13", 0x4c00, "vdd_l13_l19_l23_l24", },
	{ "l14", 0x4d00, "vdd_l14_l15", },
	{ "l15", 0x4e00, "vdd_l14_l15", },
	{ "l16", 0x4f00, "vdd_l8_l16_l30", },
	{ "l17", 0x5000, "vdd_l17_l29", },
	{ "l18", 0x5100, "vdd_l9_l10_l18_l22", },
	{ "l19", 0x5200, "vdd_l13_l19_l23_l24", },
	{ "l20", 0x5300, "vdd_l20_l21", },
	{ "l21", 0x5400, "vdd_l20_l21", },
	{ "l22", 0x5500, "vdd_l9_l10_l18_l22", },
	{ "l23", 0x5600, "vdd_l13_l19_l23_l24", },
	{ "l24", 0x5700, "vdd_l13_l19_l23_l24", },
	{ "l25", 0x5800, "vdd_l25", },
	{ "l26", 0x5900, "vdd_l2_l26_l28", },
	{ "l27", 0x5a00, "vdd_l4_l27_l31", },
	{ "l28", 0x5b00, "vdd_l2_l26_l28", },
	{ "l29", 0x5c00, "vdd_l17_l29", },
	{ "l30", 0x5d00, "vdd_l8_l16_l30", },
	{ "l31", 0x5e00, "vdd_l4_l27_l31", },
	{ "l32", 0x5f00, "vdd_l6_l12_l32", },
	{ "lvs1", 0x8000, "vdd_lvs_1_2", },
	{ "lvs2", 0x8100, "vdd_lvs_1_2", },
	{ }
};

static const struct of_device_id qcom_spmi_regulator_match[] = {
	{ .compatible = "qcom,pm8841-regulators", .data = &pm8841_regulators },
	{ .compatible = "qcom,pm8916-regulators", .data = &pm8916_regulators },
	{ .compatible = "qcom,pm8941-regulators", .data = &pm8941_regulators },
	{ .compatible = "qcom,pm8994-regulators", .data = &pm8994_regulators },
	{ }
};
MODULE_DEVICE_TABLE(of, qcom_spmi_regulator_match);

static int qcom_spmi_regulator_probe(struct platform_device *pdev)
{
	const struct spmi_regulator_data *reg;
	const struct of_device_id *match;
	struct regulator_config config = { };
	struct regulator_dev *rdev;
	struct spmi_regulator *vreg;
	struct regmap *regmap;
	const char *name;
	struct device *dev = &pdev->dev;
	int ret;
	struct list_head *vreg_list;

	vreg_list = devm_kzalloc(dev, sizeof(*vreg_list), GFP_KERNEL);
	if (!vreg_list)
		return -ENOMEM;
	INIT_LIST_HEAD(vreg_list);
	platform_set_drvdata(pdev, vreg_list);

	regmap = dev_get_regmap(dev->parent, NULL);
	if (!regmap)
		return -ENODEV;

	match = of_match_device(qcom_spmi_regulator_match, &pdev->dev);
	if (!match)
		return -ENODEV;

	for (reg = match->data; reg->name; reg++) {
		vreg = devm_kzalloc(dev, sizeof(*vreg), GFP_KERNEL);
		if (!vreg)
			return -ENOMEM;

		vreg->dev = dev;
		vreg->base = reg->base;
		vreg->regmap = regmap;

		if (reg->ocp) {
			vreg->ocp_irq = platform_get_irq_byname(pdev, reg->ocp);
			if (vreg->ocp_irq < 0) {
				ret = vreg->ocp_irq;
				goto err;
			}
		}

		vreg->desc.id = -1;
		vreg->desc.owner = THIS_MODULE;
		vreg->desc.type = REGULATOR_VOLTAGE;
		vreg->desc.name = name = reg->name;
		vreg->desc.supply_name = reg->supply;
		vreg->desc.of_match = reg->name;
		vreg->desc.of_parse_cb = spmi_regulator_of_parse;
		vreg->desc.of_map_mode = spmi_regulator_of_map_mode;

		ret = spmi_regulator_match(vreg, reg->force_type);
		if (ret)
			continue;

		config.dev = dev;
		config.driver_data = vreg;
		rdev = devm_regulator_register(dev, &vreg->desc, &config);
		if (IS_ERR(rdev)) {
			dev_err(dev, "failed to register %s\n", name);
			ret = PTR_ERR(rdev);
			goto err;
		}

		INIT_LIST_HEAD(&vreg->node);
		list_add(&vreg->node, vreg_list);
	}

	return 0;

err:
	list_for_each_entry(vreg, vreg_list, node)
		if (vreg->ocp_irq)
			cancel_delayed_work_sync(&vreg->ocp_work);
	return ret;
}

static int qcom_spmi_regulator_remove(struct platform_device *pdev)
{
	struct spmi_regulator *vreg;
	struct list_head *vreg_list = platform_get_drvdata(pdev);

	list_for_each_entry(vreg, vreg_list, node)
		if (vreg->ocp_irq)
			cancel_delayed_work_sync(&vreg->ocp_work);

	return 0;
}

static struct platform_driver qcom_spmi_regulator_driver = {
	.driver		= {
		.name	= "qcom-spmi-regulator",
		.of_match_table = qcom_spmi_regulator_match,
	},
	.probe		= qcom_spmi_regulator_probe,
	.remove		= qcom_spmi_regulator_remove,
};
module_platform_driver(qcom_spmi_regulator_driver);

MODULE_DESCRIPTION("Qualcomm SPMI PMIC regulator driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:qcom-spmi-regulator");