aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/regulator/twl-regulator.c
blob: 0b4f8660fdb4b65c3521e10184109378d98f766d (plain) (blame)
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
/*
 * twl-regulator.c -- support regulators in twl4030/twl6030 family chips
 *
 * Copyright (C) 2008 David Brownell
 *
 * 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.
 */

#include <linux/module.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#include <linux/i2c/twl.h>


/*
 * The TWL4030/TW5030/TPS659x0/TWL6030 family chips include power management, a
 * USB OTG transceiver, an RTC, ADC, PWM, and lots more.  Some versions
 * include an audio codec, battery charger, and more voltage regulators.
 * These chips are often used in OMAP-based systems.
 *
 * This driver implements software-based resource control for various
 * voltage regulators.  This is usually augmented with state machine
 * based control.
 */

struct twlreg_info {
	/* start of regulator's PM_RECEIVER control register bank */
	u8			base;

	/* twl resource ID, for resource control state machine */
	u8			id;

	/* voltage in mV = table[VSEL]; table_len must be a power-of-two */
	u8			table_len;
	const u16		*table;

	/* State REMAP default configuration */
	u8			remap;

	/* chip constraints on regulator behavior */
	u16			min_mV;
	u16			max_mV;

	u8			flags;

	/* used by regulator core */
	struct regulator_desc	desc;

	/* chip specific features */
	unsigned long		features;

	/*
	 * optional override functions for voltage set/get
	 * these are currently only used for SMPS regulators
	 */
	int			(*get_voltage)(void *data);
	int			(*set_voltage)(void *data, int target_uV);

	/* data passed from board for external get/set voltage */
	void			*data;
};


/* LDO control registers ... offset is from the base of its register bank.
 * The first three registers of all power resource banks help hardware to
 * manage the various resource groups.
 */
/* Common offset in TWL4030/6030 */
#define VREG_GRP		0
/* TWL4030 register offsets */
#define VREG_TYPE		1
#define VREG_REMAP		2
#define VREG_DEDICATED		3	/* LDO control */
#define VREG_VOLTAGE_SMPS_4030	9
/* TWL6030 register offsets */
#define VREG_TRANS		1
#define VREG_STATE		2
#define VREG_VOLTAGE		3
#define VREG_VOLTAGE_SMPS	4
/* TWL6030 Misc register offsets */
#define VREG_BC_ALL		1
#define VREG_BC_REF		2
#define VREG_BC_PROC		3
#define VREG_BC_CLK_RST		4

/* TWL6030 LDO register values for CFG_STATE */
#define TWL6030_CFG_STATE_OFF	0x00
#define TWL6030_CFG_STATE_ON	0x01
#define TWL6030_CFG_STATE_OFF2	0x02
#define TWL6030_CFG_STATE_SLEEP	0x03
#define TWL6030_CFG_STATE_GRP_SHIFT	5
#define TWL6030_CFG_STATE_APP_SHIFT	2
#define TWL6030_CFG_STATE_APP_MASK	(0x03 << TWL6030_CFG_STATE_APP_SHIFT)
#define TWL6030_CFG_STATE_APP(v)	(((v) & TWL6030_CFG_STATE_APP_MASK) >>\
						TWL6030_CFG_STATE_APP_SHIFT)

/* Flags for SMPS Voltage reading */
#define SMPS_OFFSET_EN		BIT(0)
#define SMPS_EXTENDED_EN	BIT(1)

/* twl6032 SMPS EPROM values */
#define TWL6030_SMPS_OFFSET		0xB0
#define TWL6030_SMPS_MULT		0xB3
#define SMPS_MULTOFFSET_SMPS4	BIT(0)
#define SMPS_MULTOFFSET_VIO	BIT(1)
#define SMPS_MULTOFFSET_SMPS3	BIT(6)

static inline int
twlreg_read(struct twlreg_info *info, unsigned slave_subgp, unsigned offset)
{
	u8 value;
	int status;

	status = twl_i2c_read_u8(slave_subgp,
			&value, info->base + offset);
	return (status < 0) ? status : value;
}

static inline int
twlreg_write(struct twlreg_info *info, unsigned slave_subgp, unsigned offset,
						 u8 value)
{
	return twl_i2c_write_u8(slave_subgp,
			value, info->base + offset);
}

/*----------------------------------------------------------------------*/

/* generic power resource operations, which work on all regulators */

static int twlreg_grp(struct regulator_dev *rdev)
{
	return twlreg_read(rdev_get_drvdata(rdev), TWL_MODULE_PM_RECEIVER,
								 VREG_GRP);
}

/*
 * Enable/disable regulators by joining/leaving the P1 (processor) group.
 * We assume nobody else is updating the DEV_GRP registers.
 */
/* definition for 4030 family */
#define P3_GRP_4030	BIT(7)		/* "peripherals" */
#define P2_GRP_4030	BIT(6)		/* secondary processor, modem, etc */
#define P1_GRP_4030	BIT(5)		/* CPU/Linux */
/* definition for 6030 family */
#define P3_GRP_6030	BIT(2)		/* secondary processor, modem, etc */
#define P2_GRP_6030	BIT(1)		/* "peripherals" */
#define P1_GRP_6030	BIT(0)		/* CPU/Linux */

static int twl4030reg_is_enabled(struct regulator_dev *rdev)
{
	int	state = twlreg_grp(rdev);

	if (state < 0)
		return state;

	return state & P1_GRP_4030;
}

static int twl6030reg_is_enabled(struct regulator_dev *rdev)
{
	struct twlreg_info	*info = rdev_get_drvdata(rdev);
	int			grp = 0, val;

	if (!(twl_class_is_6030() && (info->features & TWL6032_SUBCLASS))) {
		grp = twlreg_grp(rdev);
		if (grp < 0)
			return grp;
		grp &= P1_GRP_6030;
	} else {
		grp = 1;
	}

	val = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_STATE);
	val = TWL6030_CFG_STATE_APP(val);

	return grp && (val == TWL6030_CFG_STATE_ON);
}

static int twl4030reg_enable(struct regulator_dev *rdev)
{
	struct twlreg_info	*info = rdev_get_drvdata(rdev);
	int			grp;
	int			ret;

	grp = twlreg_grp(rdev);
	if (grp < 0)
		return grp;

	grp |= P1_GRP_4030;

	ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_GRP, grp);

	return ret;
}

static int twl6030reg_enable(struct regulator_dev *rdev)
{
	struct twlreg_info	*info = rdev_get_drvdata(rdev);
	int			grp = 0;
	int			ret;

	if (!(twl_class_is_6030() && (info->features & TWL6032_SUBCLASS)))
		grp = twlreg_grp(rdev);
	if (grp < 0)
		return grp;

	ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_STATE,
			grp << TWL6030_CFG_STATE_GRP_SHIFT |
			TWL6030_CFG_STATE_ON);
	return ret;
}

static int twl4030reg_disable(struct regulator_dev *rdev)
{
	struct twlreg_info	*info = rdev_get_drvdata(rdev);
	int			grp;
	int			ret;

	grp = twlreg_grp(rdev);
	if (grp < 0)
		return grp;

	grp &= ~(P1_GRP_4030 | P2_GRP_4030 | P3_GRP_4030);

	ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_GRP, grp);

	return ret;
}

static int twl6030reg_disable(struct regulator_dev *rdev)
{
	struct twlreg_info	*info = rdev_get_drvdata(rdev);
	int			grp = 0;
	int			ret;

	if (!(twl_class_is_6030() && (info->features & TWL6032_SUBCLASS)))
		grp = P1_GRP_6030 | P2_GRP_6030 | P3_GRP_6030;

	/* For 6030, set the off state for all grps enabled */
	ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_STATE,
			(grp) << TWL6030_CFG_STATE_GRP_SHIFT |
			TWL6030_CFG_STATE_OFF);

	return ret;
}

static int twl4030reg_get_status(struct regulator_dev *rdev)
{
	int	state = twlreg_grp(rdev);

	if (state < 0)
		return state;
	state &= 0x0f;

	/* assume state != WARM_RESET; we'd not be running...  */
	if (!state)
		return REGULATOR_STATUS_OFF;
	return (state & BIT(3))
		? REGULATOR_STATUS_NORMAL
		: REGULATOR_STATUS_STANDBY;
}

static int twl6030reg_get_status(struct regulator_dev *rdev)
{
	struct twlreg_info	*info = rdev_get_drvdata(rdev);
	int			val;

	val = twlreg_grp(rdev);
	if (val < 0)
		return val;

	val = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_STATE);

	switch (TWL6030_CFG_STATE_APP(val)) {
	case TWL6030_CFG_STATE_ON:
		return REGULATOR_STATUS_NORMAL;

	case TWL6030_CFG_STATE_SLEEP:
		return REGULATOR_STATUS_STANDBY;

	case TWL6030_CFG_STATE_OFF:
	case TWL6030_CFG_STATE_OFF2:
	default:
		break;
	}

	return REGULATOR_STATUS_OFF;
}

static int twl4030reg_set_mode(struct regulator_dev *rdev, unsigned mode)
{
	struct twlreg_info	*info = rdev_get_drvdata(rdev);
	unsigned		message;
	int			status;

	/* We can only set the mode through state machine commands... */
	switch (mode) {
	case REGULATOR_MODE_NORMAL:
		message = MSG_SINGULAR(DEV_GRP_P1, info->id, RES_STATE_ACTIVE);
		break;
	case REGULATOR_MODE_STANDBY:
		message = MSG_SINGULAR(DEV_GRP_P1, info->id, RES_STATE_SLEEP);
		break;
	default:
		return -EINVAL;
	}

	/* Ensure the resource is associated with some group */
	status = twlreg_grp(rdev);
	if (status < 0)
		return status;
	if (!(status & (P3_GRP_4030 | P2_GRP_4030 | P1_GRP_4030)))
		return -EACCES;

	status = twl_i2c_write_u8(TWL_MODULE_PM_MASTER,
			message >> 8, TWL4030_PM_MASTER_PB_WORD_MSB);
	if (status < 0)
		return status;

	return twl_i2c_write_u8(TWL_MODULE_PM_MASTER,
			message & 0xff, TWL4030_PM_MASTER_PB_WORD_LSB);
}

static int twl6030reg_set_mode(struct regulator_dev *rdev, unsigned mode)
{
	struct twlreg_info	*info = rdev_get_drvdata(rdev);
	int grp = 0;
	int val;

	if (!(twl_class_is_6030() && (info->features & TWL6032_SUBCLASS)))
		grp = twlreg_grp(rdev);

	if (grp < 0)
		return grp;

	/* Compose the state register settings */
	val = grp << TWL6030_CFG_STATE_GRP_SHIFT;
	/* We can only set the mode through state machine commands... */
	switch (mode) {
	case REGULATOR_MODE_NORMAL:
		val |= TWL6030_CFG_STATE_ON;
		break;
	case REGULATOR_MODE_STANDBY:
		val |= TWL6030_CFG_STATE_SLEEP;
		break;

	default:
		return -EINVAL;
	}

	return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_STATE, val);
}

/*----------------------------------------------------------------------*/

/*
 * Support for adjustable-voltage LDOs uses a four bit (or less) voltage
 * select field in its control register.   We use tables indexed by VSEL
 * to record voltages in milliVolts.  (Accuracy is about three percent.)
 *
 * Note that VSEL values for VAUX2 changed in twl5030 and newer silicon;
 * currently handled by listing two slightly different VAUX2 regulators,
 * only one of which will be configured.
 *
 * VSEL values documented as "TI cannot support these values" are flagged
 * in these tables as UNSUP() values; we normally won't assign them.
 *
 * VAUX3 at 3V is incorrectly listed in some TI manuals as unsupported.
 * TI are revising the twl5030/tps659x0 specs to support that 3.0V setting.
 */
#define UNSUP_MASK	0x8000

#define UNSUP(x)	(UNSUP_MASK | (x))
#define IS_UNSUP(info, x)			\
	((UNSUP_MASK & (x)) &&			\
	 !((info)->features & TWL4030_ALLOW_UNSUPPORTED))
#define LDO_MV(x)	(~UNSUP_MASK & (x))


static const u16 VAUX1_VSEL_table[] = {
	UNSUP(1500), UNSUP(1800), 2500, 2800,
	3000, 3000, 3000, 3000,
};
static const u16 VAUX2_4030_VSEL_table[] = {
	UNSUP(1000), UNSUP(1000), UNSUP(1200), 1300,
	1500, 1800, UNSUP(1850), 2500,
	UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000),
	UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
};
static const u16 VAUX2_VSEL_table[] = {
	1700, 1700, 1900, 1300,
	1500, 1800, 2000, 2500,
	2100, 2800, 2200, 2300,
	2400, 2400, 2400, 2400,
};
static const u16 VAUX3_VSEL_table[] = {
	1500, 1800, 2500, 2800,
	3000, 3000, 3000, 3000,
};
static const u16 VAUX4_VSEL_table[] = {
	700, 1000, 1200, UNSUP(1300),
	1500, 1800, UNSUP(1850), 2500,
	UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000),
	UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
};
static const u16 VMMC1_VSEL_table[] = {
	1850, 2850, 3000, 3150,
};
static const u16 VMMC2_VSEL_table[] = {
	UNSUP(1000), UNSUP(1000), UNSUP(1200), UNSUP(1300),
	UNSUP(1500), UNSUP(1800), 1850, UNSUP(2500),
	2600, 2800, 2850, 3000,
	3150, 3150, 3150, 3150,
};
static const u16 VPLL1_VSEL_table[] = {
	1000, 1200, 1300, 1800,
	UNSUP(2800), UNSUP(3000), UNSUP(3000), UNSUP(3000),
};
static const u16 VPLL2_VSEL_table[] = {
	700, 1000, 1200, 1300,
	UNSUP(1500), 1800, UNSUP(1850), UNSUP(2500),
	UNSUP(2600), UNSUP(2800), UNSUP(2850), UNSUP(3000),
	UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
};
static const u16 VSIM_VSEL_table[] = {
	UNSUP(1000), UNSUP(1200), UNSUP(1300), 1800,
	2800, 3000, 3000, 3000,
};
static const u16 VDAC_VSEL_table[] = {
	1200, 1300, 1800, 1800,
};
static const u16 VIO_VSEL_table[] = {
	1800, 1850,
};
static const u16 VINTANA2_VSEL_table[] = {
	2500, 2750,
};

static int twl4030ldo_list_voltage(struct regulator_dev *rdev, unsigned index)
{
	struct twlreg_info	*info = rdev_get_drvdata(rdev);
	int			mV = info->table[index];

	return IS_UNSUP(info, mV) ? 0 : (LDO_MV(mV) * 1000);
}

static int
twl4030ldo_set_voltage_sel(struct regulator_dev *rdev, unsigned selector)
{
	struct twlreg_info	*info = rdev_get_drvdata(rdev);

	return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE,
			    selector);
}

static int twl4030ldo_get_voltage_sel(struct regulator_dev *rdev)
{
	struct twlreg_info	*info = rdev_get_drvdata(rdev);
	int vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE);

	if (vsel < 0)
		return vsel;

	vsel &= info->table_len - 1;
	return vsel;
}

static struct regulator_ops twl4030ldo_ops = {
	.list_voltage	= twl4030ldo_list_voltage,

	.set_voltage_sel = twl4030ldo_set_voltage_sel,
	.get_voltage_sel = twl4030ldo_get_voltage_sel,

	.enable		= twl4030reg_enable,
	.disable	= twl4030reg_disable,
	.is_enabled	= twl4030reg_is_enabled,

	.set_mode	= twl4030reg_set_mode,

	.get_status	= twl4030reg_get_status,
};

static int
twl4030smps_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV,
			unsigned *selector)
{
	struct twlreg_info *info = rdev_get_drvdata(rdev);
	int vsel = DIV_ROUND_UP(min_uV - 600000, 12500);

	if (info->set_voltage) {
		return info->set_voltage(info->data, min_uV);
	} else {
		twlreg_write(info, TWL_MODULE_PM_RECEIVER,
			VREG_VOLTAGE_SMPS_4030, vsel);
	}

	return 0;
}

static int twl4030smps_get_voltage(struct regulator_dev *rdev)
{
	struct twlreg_info *info = rdev_get_drvdata(rdev);
	int vsel;

	if (info->get_voltage)
		return info->get_voltage(info->data);

	vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER,
		VREG_VOLTAGE_SMPS_4030);

	return vsel * 12500 + 600000;
}

static struct regulator_ops twl4030smps_ops = {
	.set_voltage	= twl4030smps_set_voltage,
	.get_voltage	= twl4030smps_get_voltage,
};

static int twl6030coresmps_set_voltage(struct regulator_dev *rdev, int min_uV,
	int max_uV, unsigned *selector)
{
	struct twlreg_info *info = rdev_get_drvdata(rdev);

	if (info->set_voltage)
		return info->set_voltage(info->data, min_uV);

	return -ENODEV;
}

static int twl6030coresmps_get_voltage(struct regulator_dev *rdev)
{
	struct twlreg_info *info = rdev_get_drvdata(rdev);

	if (info->get_voltage)
		return info->get_voltage(info->data);

	return -ENODEV;
}

static struct regulator_ops twl6030coresmps_ops = {
	.set_voltage	= twl6030coresmps_set_voltage,
	.get_voltage	= twl6030coresmps_get_voltage,
};

static int twl6030ldo_list_voltage(struct regulator_dev *rdev, unsigned sel)
{
	struct twlreg_info *info = rdev_get_drvdata(rdev);

	switch (sel) {
	case 0:
		return 0;
	case 1 ... 24:
		/* Linear mapping from 00000001 to 00011000:
		 * Absolute voltage value = 1.0 V + 0.1 V × (sel – 00000001)
		 */
		return (info->min_mV + 100 * (sel - 1)) * 1000;
	case 25 ... 30:
		return -EINVAL;
	case 31:
		return 2750000;
	default:
		return -EINVAL;
	}
}

static int
twl6030ldo_set_voltage_sel(struct regulator_dev *rdev, unsigned selector)
{
	struct twlreg_info	*info = rdev_get_drvdata(rdev);

	return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE,
			    selector);
}

static int twl6030ldo_get_voltage_sel(struct regulator_dev *rdev)
{
	struct twlreg_info	*info = rdev_get_drvdata(rdev);
	int vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE);

	return vsel;
}

static struct regulator_ops twl6030ldo_ops = {
	.list_voltage	= twl6030ldo_list_voltage,

	.set_voltage_sel = twl6030ldo_set_voltage_sel,
	.get_voltage_sel = twl6030ldo_get_voltage_sel,

	.enable		= twl6030reg_enable,
	.disable	= twl6030reg_disable,
	.is_enabled	= twl6030reg_is_enabled,

	.set_mode	= twl6030reg_set_mode,

	.get_status	= twl6030reg_get_status,
};

/*----------------------------------------------------------------------*/

static struct regulator_ops twl4030fixed_ops = {
	.list_voltage	= regulator_list_voltage_linear,

	.enable		= twl4030reg_enable,
	.disable	= twl4030reg_disable,
	.is_enabled	= twl4030reg_is_enabled,

	.set_mode	= twl4030reg_set_mode,

	.get_status	= twl4030reg_get_status,
};

static struct regulator_ops twl6030fixed_ops = {
	.list_voltage	= regulator_list_voltage_linear,

	.enable		= twl6030reg_enable,
	.disable	= twl6030reg_disable,
	.is_enabled	= twl6030reg_is_enabled,

	.set_mode	= twl6030reg_set_mode,

	.get_status	= twl6030reg_get_status,
};

/*
 * SMPS status and control
 */

static int twl6030smps_list_voltage(struct regulator_dev *rdev, unsigned index)
{
	struct twlreg_info	*info = rdev_get_drvdata(rdev);

	int voltage = 0;

	switch (info->flags) {
	case SMPS_OFFSET_EN:
		voltage = 100000;
		/* fall through */
	case 0:
		switch (index) {
		case 0:
			voltage = 0;
			break;
		case 58:
			voltage = 1350 * 1000;
			break;
		case 59:
			voltage = 1500 * 1000;
			break;
		case 60:
			voltage = 1800 * 1000;
			break;
		case 61:
			voltage = 1900 * 1000;
			break;
		case 62:
			voltage = 2100 * 1000;
			break;
		default:
			voltage += (600000 + (12500 * (index - 1)));
		}
		break;
	case SMPS_EXTENDED_EN:
		switch (index) {
		case 0:
			voltage = 0;
			break;
		case 58:
			voltage = 2084 * 1000;
			break;
		case 59:
			voltage = 2315 * 1000;
			break;
		case 60:
			voltage = 2778 * 1000;
			break;
		case 61:
			voltage = 2932 * 1000;
			break;
		case 62:
			voltage = 3241 * 1000;
			break;
		default:
			voltage = (1852000 + (38600 * (index - 1)));
		}
		break;
	case SMPS_OFFSET_EN | SMPS_EXTENDED_EN:
		switch (index) {
		case 0:
			voltage = 0;
			break;
		case 58:
			voltage = 4167 * 1000;
			break;
		case 59:
			voltage = 2315 * 1000;
			break;
		case 60:
			voltage = 2778 * 1000;
			break;
		case 61:
			voltage = 2932 * 1000;
			break;
		case 62:
			voltage = 3241 * 1000;
			break;
		default:
			voltage = (2161000 + (38600 * (index - 1)));
		}
		break;
	}

	return voltage;
}

static int twl6030smps_map_voltage(struct regulator_dev *rdev, int min_uV,
				   int max_uV)
{
	struct twlreg_info *info = rdev_get_drvdata(rdev);
	int vsel = 0;

	switch (info->flags) {
	case 0:
		if (min_uV == 0)
			vsel = 0;
		else if ((min_uV >= 600000) && (min_uV <= 1300000)) {
			vsel = DIV_ROUND_UP(min_uV - 600000, 12500);
			vsel++;
		}
		/* Values 1..57 for vsel are linear and can be calculated
		 * values 58..62 are non linear.
		 */
		else if ((min_uV > 1900000) && (min_uV <= 2100000))
			vsel = 62;
		else if ((min_uV > 1800000) && (min_uV <= 1900000))
			vsel = 61;
		else if ((min_uV > 1500000) && (min_uV <= 1800000))
			vsel = 60;
		else if ((min_uV > 1350000) && (min_uV <= 1500000))
			vsel = 59;
		else if ((min_uV > 1300000) && (min_uV <= 1350000))
			vsel = 58;
		else
			return -EINVAL;
		break;
	case SMPS_OFFSET_EN:
		if (min_uV == 0)
			vsel = 0;
		else if ((min_uV >= 700000) && (min_uV <= 1420000)) {
			vsel = DIV_ROUND_UP(min_uV - 700000, 12500);
			vsel++;
		}
		/* Values 1..57 for vsel are linear and can be calculated
		 * values 58..62 are non linear.
		 */
		else if ((min_uV > 1900000) && (min_uV <= 2100000))
			vsel = 62;
		else if ((min_uV > 1800000) && (min_uV <= 1900000))
			vsel = 61;
		else if ((min_uV > 1350000) && (min_uV <= 1800000))
			vsel = 60;
		else if ((min_uV > 1350000) && (min_uV <= 1500000))
			vsel = 59;
		else if ((min_uV > 1300000) && (min_uV <= 1350000))
			vsel = 58;
		else
			return -EINVAL;
		break;
	case SMPS_EXTENDED_EN:
		if (min_uV == 0) {
			vsel = 0;
		} else if ((min_uV >= 1852000) && (max_uV <= 4013600)) {
			vsel = DIV_ROUND_UP(min_uV - 1852000, 38600);
			vsel++;
		}
		break;
	case SMPS_OFFSET_EN|SMPS_EXTENDED_EN:
		if (min_uV == 0) {
			vsel = 0;
		} else if ((min_uV >= 2161000) && (min_uV <= 4321000)) {
			vsel = DIV_ROUND_UP(min_uV - 2161000, 38600);
			vsel++;
		}
		break;
	}

	return vsel;
}

static int twl6030smps_set_voltage_sel(struct regulator_dev *rdev,
				       unsigned int selector)
{
	struct twlreg_info *info = rdev_get_drvdata(rdev);

	return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE_SMPS,
			    selector);
}

static int twl6030smps_get_voltage_sel(struct regulator_dev *rdev)
{
	struct twlreg_info	*info = rdev_get_drvdata(rdev);

	return twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE_SMPS);
}

static struct regulator_ops twlsmps_ops = {
	.list_voltage		= twl6030smps_list_voltage,
	.map_voltage		= twl6030smps_map_voltage,

	.set_voltage_sel	= twl6030smps_set_voltage_sel,
	.get_voltage_sel	= twl6030smps_get_voltage_sel,

	.enable			= twl6030reg_enable,
	.disable		= twl6030reg_disable,
	.is_enabled		= twl6030reg_is_enabled,

	.set_mode		= twl6030reg_set_mode,

	.get_status		= twl6030reg_get_status,
};

/*----------------------------------------------------------------------*/

#define TWL4030_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \
			remap_conf) \
		TWL_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \
			remap_conf, TWL4030, twl4030fixed_ops)
#define TWL6030_FIXED_LDO(label, offset, mVolts, turnon_delay) \
		TWL_FIXED_LDO(label, offset, mVolts, 0x0, turnon_delay, \
			0x0, TWL6030, twl6030fixed_ops)

#define TWL4030_ADJUSTABLE_LDO(label, offset, num, turnon_delay, remap_conf) \
static const struct twlreg_info TWL4030_INFO_##label = { \
	.base = offset, \
	.id = num, \
	.table_len = ARRAY_SIZE(label##_VSEL_table), \
	.table = label##_VSEL_table, \
	.remap = remap_conf, \
	.desc = { \
		.name = #label, \
		.id = TWL4030_REG_##label, \
		.n_voltages = ARRAY_SIZE(label##_VSEL_table), \
		.ops = &twl4030ldo_ops, \
		.type = REGULATOR_VOLTAGE, \
		.owner = THIS_MODULE, \
		.enable_time = turnon_delay, \
		}, \
	}

#define TWL4030_ADJUSTABLE_SMPS(label, offset, num, turnon_delay, remap_conf) \
static const struct twlreg_info TWL4030_INFO_##label = { \
	.base = offset, \
	.id = num, \
	.remap = remap_conf, \
	.desc = { \
		.name = #label, \
		.id = TWL4030_REG_##label, \
		.ops = &twl4030smps_ops, \
		.type = REGULATOR_VOLTAGE, \
		.owner = THIS_MODULE, \
		.enable_time = turnon_delay, \
		}, \
	}

#define TWL6030_ADJUSTABLE_SMPS(label) \
static const struct twlreg_info TWL6030_INFO_##label = { \
	.desc = { \
		.name = #label, \
		.id = TWL6030_REG_##label, \
		.ops = &twl6030coresmps_ops, \
		.type = REGULATOR_VOLTAGE, \
		.owner = THIS_MODULE, \
		}, \
	}

#define TWL6030_ADJUSTABLE_LDO(label, offset, min_mVolts, max_mVolts) \
static const struct twlreg_info TWL6030_INFO_##label = { \
	.base = offset, \
	.min_mV = min_mVolts, \
	.max_mV = max_mVolts, \
	.desc = { \
		.name = #label, \
		.id = TWL6030_REG_##label, \
		.n_voltages = 32, \
		.ops = &twl6030ldo_ops, \
		.type = REGULATOR_VOLTAGE, \
		.owner = THIS_MODULE, \
		}, \
	}

#define TWL6032_ADJUSTABLE_LDO(label, offset, min_mVolts, max_mVolts) \
static const struct twlreg_info TWL6032_INFO_##label = { \
	.base = offset, \
	.min_mV = min_mVolts, \
	.max_mV = max_mVolts, \
	.desc = { \
		.name = #label, \
		.id = TWL6032_REG_##label, \
		.n_voltages = 32, \
		.ops = &twl6030ldo_ops, \
		.type = REGULATOR_VOLTAGE, \
		.owner = THIS_MODULE, \
		}, \
	}

#define TWL_FIXED_LDO(label, offset, mVolts, num, turnon_delay, remap_conf, \
		family, operations) \
static const struct twlreg_info TWLFIXED_INFO_##label = { \
	.base = offset, \
	.id = num, \
	.min_mV = mVolts, \
	.remap = remap_conf, \
	.desc = { \
		.name = #label, \
		.id = family##_REG_##label, \
		.n_voltages = 1, \
		.ops = &operations, \
		.type = REGULATOR_VOLTAGE, \
		.owner = THIS_MODULE, \
		.min_uV = mVolts * 1000, \
		.enable_time = turnon_delay, \
		}, \
	}

#define TWL6032_ADJUSTABLE_SMPS(label, offset) \
static const struct twlreg_info TWLSMPS_INFO_##label = { \
	.base = offset, \
	.min_mV = 600, \
	.max_mV = 2100, \
	.desc = { \
		.name = #label, \
		.id = TWL6032_REG_##label, \
		.n_voltages = 63, \
		.ops = &twlsmps_ops, \
		.type = REGULATOR_VOLTAGE, \
		.owner = THIS_MODULE, \
		}, \
	}

/*
 * We list regulators here if systems need some level of
 * software control over them after boot.
 */
TWL4030_ADJUSTABLE_LDO(VAUX1, 0x17, 1, 100, 0x08);
TWL4030_ADJUSTABLE_LDO(VAUX2_4030, 0x1b, 2, 100, 0x08);
TWL4030_ADJUSTABLE_LDO(VAUX2, 0x1b, 2, 100, 0x08);
TWL4030_ADJUSTABLE_LDO(VAUX3, 0x1f, 3, 100, 0x08);
TWL4030_ADJUSTABLE_LDO(VAUX4, 0x23, 4, 100, 0x08);
TWL4030_ADJUSTABLE_LDO(VMMC1, 0x27, 5, 100, 0x08);
TWL4030_ADJUSTABLE_LDO(VMMC2, 0x2b, 6, 100, 0x08);
TWL4030_ADJUSTABLE_LDO(VPLL1, 0x2f, 7, 100, 0x00);
TWL4030_ADJUSTABLE_LDO(VPLL2, 0x33, 8, 100, 0x08);
TWL4030_ADJUSTABLE_LDO(VSIM, 0x37, 9, 100, 0x00);
TWL4030_ADJUSTABLE_LDO(VDAC, 0x3b, 10, 100, 0x08);
TWL4030_ADJUSTABLE_LDO(VINTANA2, 0x43, 12, 100, 0x08);
TWL4030_ADJUSTABLE_LDO(VIO, 0x4b, 14, 1000, 0x08);
TWL4030_ADJUSTABLE_SMPS(VDD1, 0x55, 15, 1000, 0x08);
TWL4030_ADJUSTABLE_SMPS(VDD2, 0x63, 16, 1000, 0x08);
/* VUSBCP is managed *only* by the USB subchip */
/* 6030 REG with base as PMC Slave Misc : 0x0030 */
/* Turnon-delay and remap configuration values for 6030 are not
   verified since the specification is not public */
TWL6030_ADJUSTABLE_SMPS(VDD1);
TWL6030_ADJUSTABLE_SMPS(VDD2);
TWL6030_ADJUSTABLE_SMPS(VDD3);
TWL6030_ADJUSTABLE_LDO(VAUX1_6030, 0x54, 1000, 3300);
TWL6030_ADJUSTABLE_LDO(VAUX2_6030, 0x58, 1000, 3300);
TWL6030_ADJUSTABLE_LDO(VAUX3_6030, 0x5c, 1000, 3300);
TWL6030_ADJUSTABLE_LDO(VMMC, 0x68, 1000, 3300);
TWL6030_ADJUSTABLE_LDO(VPP, 0x6c, 1000, 3300);
TWL6030_ADJUSTABLE_LDO(VUSIM, 0x74, 1000, 3300);
/* 6025 are renamed compared to 6030 versions */
TWL6032_ADJUSTABLE_LDO(LDO2, 0x54, 1000, 3300);
TWL6032_ADJUSTABLE_LDO(LDO4, 0x58, 1000, 3300);
TWL6032_ADJUSTABLE_LDO(LDO3, 0x5c, 1000, 3300);
TWL6032_ADJUSTABLE_LDO(LDO5, 0x68, 1000, 3300);
TWL6032_ADJUSTABLE_LDO(LDO1, 0x6c, 1000, 3300);
TWL6032_ADJUSTABLE_LDO(LDO7, 0x74, 1000, 3300);
TWL6032_ADJUSTABLE_LDO(LDO6, 0x60, 1000, 3300);
TWL6032_ADJUSTABLE_LDO(LDOLN, 0x64, 1000, 3300);
TWL6032_ADJUSTABLE_LDO(LDOUSB, 0x70, 1000, 3300);
TWL4030_FIXED_LDO(VINTANA1, 0x3f, 1500, 11, 100, 0x08);
TWL4030_FIXED_LDO(VINTDIG, 0x47, 1500, 13, 100, 0x08);
TWL4030_FIXED_LDO(VUSB1V5, 0x71, 1500, 17, 100, 0x08);
TWL4030_FIXED_LDO(VUSB1V8, 0x74, 1800, 18, 100, 0x08);
TWL4030_FIXED_LDO(VUSB3V1, 0x77, 3100, 19, 150, 0x08);
TWL6030_FIXED_LDO(VANA, 0x50, 2100, 0);
TWL6030_FIXED_LDO(VCXIO, 0x60, 1800, 0);
TWL6030_FIXED_LDO(VDAC, 0x64, 1800, 0);
TWL6030_FIXED_LDO(VUSB, 0x70, 3300, 0);
TWL6030_FIXED_LDO(V1V8, 0x16, 1800, 0);
TWL6030_FIXED_LDO(V2V1, 0x1c, 2100, 0);
TWL6032_ADJUSTABLE_SMPS(SMPS3, 0x34);
TWL6032_ADJUSTABLE_SMPS(SMPS4, 0x10);
TWL6032_ADJUSTABLE_SMPS(VIO, 0x16);

static u8 twl_get_smps_offset(void)
{
	u8 value;

	twl_i2c_read_u8(TWL_MODULE_PM_RECEIVER, &value,
			TWL6030_SMPS_OFFSET);
	return value;
}

static u8 twl_get_smps_mult(void)
{
	u8 value;

	twl_i2c_read_u8(TWL_MODULE_PM_RECEIVER, &value,
			TWL6030_SMPS_MULT);
	return value;
}

#define TWL_OF_MATCH(comp, family, label) \
	{ \
		.compatible = comp, \
		.data = &family##_INFO_##label, \
	}

#define TWL4030_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWL4030, label)
#define TWL6030_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWL6030, label)
#define TWL6032_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWL6032, label)
#define TWLFIXED_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWLFIXED, label)
#define TWLSMPS_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWLSMPS, label)

static const struct of_device_id twl_of_match[] = {
	TWL4030_OF_MATCH("ti,twl4030-vaux1", VAUX1),
	TWL4030_OF_MATCH("ti,twl4030-vaux2", VAUX2_4030),
	TWL4030_OF_MATCH("ti,twl5030-vaux2", VAUX2),
	TWL4030_OF_MATCH("ti,twl4030-vaux3", VAUX3),
	TWL4030_OF_MATCH("ti,twl4030-vaux4", VAUX4),
	TWL4030_OF_MATCH("ti,twl4030-vmmc1", VMMC1),
	TWL4030_OF_MATCH("ti,twl4030-vmmc2", VMMC2),
	TWL4030_OF_MATCH("ti,twl4030-vpll1", VPLL1),
	TWL4030_OF_MATCH("ti,twl4030-vpll2", VPLL2),
	TWL4030_OF_MATCH("ti,twl4030-vsim", VSIM),
	TWL4030_OF_MATCH("ti,twl4030-vdac", VDAC),
	TWL4030_OF_MATCH("ti,twl4030-vintana2", VINTANA2),
	TWL4030_OF_MATCH("ti,twl4030-vio", VIO),
	TWL4030_OF_MATCH("ti,twl4030-vdd1", VDD1),
	TWL4030_OF_MATCH("ti,twl4030-vdd2", VDD2),
	TWL6030_OF_MATCH("ti,twl6030-vdd1", VDD1),
	TWL6030_OF_MATCH("ti,twl6030-vdd2", VDD2),
	TWL6030_OF_MATCH("ti,twl6030-vdd3", VDD3),
	TWL6030_OF_MATCH("ti,twl6030-vaux1", VAUX1_6030),
	TWL6030_OF_MATCH("ti,twl6030-vaux2", VAUX2_6030),
	TWL6030_OF_MATCH("ti,twl6030-vaux3", VAUX3_6030),
	TWL6030_OF_MATCH("ti,twl6030-vmmc", VMMC),
	TWL6030_OF_MATCH("ti,twl6030-vpp", VPP),
	TWL6030_OF_MATCH("ti,twl6030-vusim", VUSIM),
	TWL6032_OF_MATCH("ti,twl6032-ldo2", LDO2),
	TWL6032_OF_MATCH("ti,twl6032-ldo4", LDO4),
	TWL6032_OF_MATCH("ti,twl6032-ldo3", LDO3),
	TWL6032_OF_MATCH("ti,twl6032-ldo5", LDO5),
	TWL6032_OF_MATCH("ti,twl6032-ldo1", LDO1),
	TWL6032_OF_MATCH("ti,twl6032-ldo7", LDO7),
	TWL6032_OF_MATCH("ti,twl6032-ldo6", LDO6),
	TWL6032_OF_MATCH("ti,twl6032-ldoln", LDOLN),
	TWL6032_OF_MATCH("ti,twl6032-ldousb", LDOUSB),
	TWLFIXED_OF_MATCH("ti,twl4030-vintana1", VINTANA1),
	TWLFIXED_OF_MATCH("ti,twl4030-vintdig", VINTDIG),
	TWLFIXED_OF_MATCH("ti,twl4030-vusb1v5", VUSB1V5),
	TWLFIXED_OF_MATCH("ti,twl4030-vusb1v8", VUSB1V8),
	TWLFIXED_OF_MATCH("ti,twl4030-vusb3v1", VUSB3V1),
	TWLFIXED_OF_MATCH("ti,twl6030-vana", VANA),
	TWLFIXED_OF_MATCH("ti,twl6030-vcxio", VCXIO),
	TWLFIXED_OF_MATCH("ti,twl6030-vdac", VDAC),
	TWLFIXED_OF_MATCH("ti,twl6030-vusb", VUSB),
	TWLFIXED_OF_MATCH("ti,twl6030-v1v8", V1V8),
	TWLFIXED_OF_MATCH("ti,twl6030-v2v1", V2V1),
	TWLSMPS_OF_MATCH("ti,twl6032-smps3", SMPS3),
	TWLSMPS_OF_MATCH("ti,twl6032-smps4", SMPS4),
	TWLSMPS_OF_MATCH("ti,twl6032-vio", VIO),
	{},
};
MODULE_DEVICE_TABLE(of, twl_of_match);

static int twlreg_probe(struct platform_device *pdev)
{
	int				i, id;
	struct twlreg_info		*info;
	const struct twlreg_info	*template;
	struct regulator_init_data	*initdata;
	struct regulation_constraints	*c;
	struct regulator_dev		*rdev;
	struct twl_regulator_driver_data	*drvdata;
	const struct of_device_id	*match;
	struct regulator_config		config = { };

	match = of_match_device(twl_of_match, &pdev->dev);
	if (match) {
		template = match->data;
		id = template->desc.id;
		initdata = of_get_regulator_init_data(&pdev->dev,
						      pdev->dev.of_node);
		drvdata = NULL;
	} else {
		id = pdev->id;
		initdata = dev_get_platdata(&pdev->dev);
		for (i = 0, template = NULL; i < ARRAY_SIZE(twl_of_match); i++) {
			template = twl_of_match[i].data;
			if (template && template->desc.id == id)
				break;
		}
		if (i == ARRAY_SIZE(twl_of_match))
			return -ENODEV;

		drvdata = initdata->driver_data;
		if (!drvdata)
			return -EINVAL;
	}

	if (!template)
		return -ENODEV;

	if (!initdata)
		return -EINVAL;

	info = devm_kmemdup(&pdev->dev, template, sizeof(*info), GFP_KERNEL);
	if (!info)
		return -ENOMEM;

	if (drvdata) {
		/* copy the driver data into regulator data */
		info->features = drvdata->features;
		info->data = drvdata->data;
		info->set_voltage = drvdata->set_voltage;
		info->get_voltage = drvdata->get_voltage;
	}

	/* Constrain board-specific capabilities according to what
	 * this driver and the chip itself can actually do.
	 */
	c = &initdata->constraints;
	c->valid_modes_mask &= REGULATOR_MODE_NORMAL | REGULATOR_MODE_STANDBY;
	c->valid_ops_mask &= REGULATOR_CHANGE_VOLTAGE
				| REGULATOR_CHANGE_MODE
				| REGULATOR_CHANGE_STATUS;
	switch (id) {
	case TWL4030_REG_VIO:
	case TWL4030_REG_VDD1:
	case TWL4030_REG_VDD2:
	case TWL4030_REG_VPLL1:
	case TWL4030_REG_VINTANA1:
	case TWL4030_REG_VINTANA2:
	case TWL4030_REG_VINTDIG:
		c->always_on = true;
		break;
	default:
		break;
	}

	switch (id) {
	case TWL6032_REG_SMPS3:
		if (twl_get_smps_mult() & SMPS_MULTOFFSET_SMPS3)
			info->flags |= SMPS_EXTENDED_EN;
		if (twl_get_smps_offset() & SMPS_MULTOFFSET_SMPS3)
			info->flags |= SMPS_OFFSET_EN;
		break;
	case TWL6032_REG_SMPS4:
		if (twl_get_smps_mult() & SMPS_MULTOFFSET_SMPS4)
			info->flags |= SMPS_EXTENDED_EN;
		if (twl_get_smps_offset() & SMPS_MULTOFFSET_SMPS4)
			info->flags |= SMPS_OFFSET_EN;
		break;
	case TWL6032_REG_VIO:
		if (twl_get_smps_mult() & SMPS_MULTOFFSET_VIO)
			info->flags |= SMPS_EXTENDED_EN;
		if (twl_get_smps_offset() & SMPS_MULTOFFSET_VIO)
			info->flags |= SMPS_OFFSET_EN;
		break;
	}

	config.dev = &pdev->dev;
	config.init_data = initdata;
	config.driver_data = info;
	config.of_node = pdev->dev.of_node;

	rdev = devm_regulator_register(&pdev->dev, &info->desc, &config);
	if (IS_ERR(rdev)) {
		dev_err(&pdev->dev, "can't register %s, %ld\n",
				info->desc.name, PTR_ERR(rdev));
		return PTR_ERR(rdev);
	}
	platform_set_drvdata(pdev, rdev);

	if (twl_class_is_4030())
		twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_REMAP,
						info->remap);

	/* NOTE:  many regulators support short-circuit IRQs (presentable
	 * as REGULATOR_OVER_CURRENT notifications?) configured via:
	 *  - SC_CONFIG
	 *  - SC_DETECT1 (vintana2, vmmc1/2, vaux1/2/3/4)
	 *  - SC_DETECT2 (vusb, vdac, vio, vdd1/2, vpll2)
	 *  - IT_CONFIG
	 */

	return 0;
}

MODULE_ALIAS("platform:twl_reg");

static struct platform_driver twlreg_driver = {
	.probe		= twlreg_probe,
	/* NOTE: short name, to work around driver model truncation of
	 * "twl_regulator.12" (and friends) to "twl_regulator.1".
	 */
	.driver  = {
		.name  = "twl_reg",
		.owner = THIS_MODULE,
		.of_match_table = of_match_ptr(twl_of_match),
	},
};

static int __init twlreg_init(void)
{
	return platform_driver_register(&twlreg_driver);
}
subsys_initcall(twlreg_init);

static void __exit twlreg_exit(void)
{
	platform_driver_unregister(&twlreg_driver);
}
module_exit(twlreg_exit)

MODULE_DESCRIPTION("TWL regulator driver");
MODULE_LICENSE("GPL");