aboutsummaryrefslogtreecommitdiff
path: root/drivers/regulator/da9063-regulator.c
blob: b9f2653e4ef90f315de25752fe24821a98497848 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
/*
 * Regulator driver for DA9063 PMIC series
 *
 * Copyright 2012 Dialog Semiconductors Ltd.
 * Copyright 2013 Philipp Zabel, Pengutronix
 *
 * Author: Krystian Garbaciak <krystian.garbaciak@diasemi.com>
 *
 *  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/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#include <linux/mfd/da9063/core.h>
#include <linux/mfd/da9063/pdata.h>
#include <linux/mfd/da9063/registers.h>


/* Definition for registering regmap bit fields using a mask */
#define BFIELD(_reg, _mask) \
	REG_FIELD(_reg, __builtin_ffs((int)_mask) - 1, \
		sizeof(unsigned int) * 8 - __builtin_clz((_mask)) - 1)

/* Regulator capabilities and registers description */
struct da9063_regulator_info {
	struct regulator_desc desc;

	/* Current limiting */
	unsigned	n_current_limits;
	const int	*current_limits;

	/* DA9063 main register fields */
	struct reg_field mode;		/* buck mode of operation */
	struct reg_field suspend;
	struct reg_field sleep;
	struct reg_field suspend_sleep;
	unsigned int suspend_vsel_reg;
	struct reg_field ilimit;

	/* DA9063 event detection bit */
	struct reg_field oc_event;
};

/* Macros for LDO */
#define DA9063_LDO(chip, regl_name, min_mV, step_mV, max_mV) \
	.desc.id = chip##_ID_##regl_name, \
	.desc.name = __stringify(chip##_##regl_name), \
	.desc.ops = &da9063_ldo_ops, \
	.desc.min_uV = (min_mV) * 1000, \
	.desc.uV_step = (step_mV) * 1000, \
	.desc.n_voltages = (((max_mV) - (min_mV))/(step_mV) + 1), \
	.desc.enable_reg = DA9063_REG_##regl_name##_CONT, \
	.desc.enable_mask = DA9063_LDO_EN, \
	.desc.vsel_reg = DA9063_REG_V##regl_name##_A, \
	.desc.vsel_mask = DA9063_V##regl_name##_MASK, \
	.desc.linear_min_sel = DA9063_V##regl_name##_BIAS, \
	.sleep = BFIELD(DA9063_REG_V##regl_name##_A, DA9063_LDO_SL), \
	.suspend_sleep = BFIELD(DA9063_REG_V##regl_name##_B, DA9063_LDO_SL), \
	.suspend_vsel_reg = DA9063_REG_V##regl_name##_B

/* Macros for voltage DC/DC converters (BUCKs) */
#define DA9063_BUCK(chip, regl_name, min_mV, step_mV, max_mV, limits_array) \
	.desc.id = chip##_ID_##regl_name, \
	.desc.name = __stringify(chip##_##regl_name), \
	.desc.ops = &da9063_buck_ops, \
	.desc.min_uV = (min_mV) * 1000, \
	.desc.uV_step = (step_mV) * 1000, \
	.desc.n_voltages = ((max_mV) - (min_mV))/(step_mV) + 1, \
	.current_limits = limits_array, \
	.n_current_limits = ARRAY_SIZE(limits_array)

#define DA9063_BUCK_COMMON_FIELDS(regl_name) \
	.desc.enable_reg = DA9063_REG_##regl_name##_CONT, \
	.desc.enable_mask = DA9063_BUCK_EN, \
	.desc.vsel_reg = DA9063_REG_V##regl_name##_A, \
	.desc.vsel_mask = DA9063_VBUCK_MASK, \
	.desc.linear_min_sel = DA9063_VBUCK_BIAS, \
	.sleep = BFIELD(DA9063_REG_V##regl_name##_A, DA9063_BUCK_SL), \
	.suspend_sleep = BFIELD(DA9063_REG_V##regl_name##_B, DA9063_BUCK_SL), \
	.suspend_vsel_reg = DA9063_REG_V##regl_name##_B, \
	.mode = BFIELD(DA9063_REG_##regl_name##_CFG, DA9063_BUCK_MODE_MASK)

/* Defines asignment of regulators info table to chip model */
struct da9063_dev_model {
	const struct da9063_regulator_info	*regulator_info;
	unsigned				n_regulators;
	unsigned				dev_model;
};

/* Single regulator settings */
struct da9063_regulator {
	struct regulator_desc			desc;
	struct regulator_dev			*rdev;
	struct da9063				*hw;
	const struct da9063_regulator_info	*info;

	struct regmap_field			*mode;
	struct regmap_field			*suspend;
	struct regmap_field			*sleep;
	struct regmap_field			*suspend_sleep;
	struct regmap_field			*ilimit;
};

/* Encapsulates all information for the regulators driver */
struct da9063_regulators {
	int					irq_ldo_lim;
	int					irq_uvov;

	unsigned				n_regulators;
	/* Array size to be defined during init. Keep at end. */
	struct da9063_regulator			regulator[0];
};

/* BUCK modes for DA9063 */
enum {
	BUCK_MODE_MANUAL,	/* 0 */
	BUCK_MODE_SLEEP,	/* 1 */
	BUCK_MODE_SYNC,		/* 2 */
	BUCK_MODE_AUTO		/* 3 */
};

/* Regulator operations */

/* Current limits array (in uA) for BCORE1, BCORE2, BPRO.
   Entry indexes corresponds to register values. */
static const int da9063_buck_a_limits[] = {
	 500000,  600000,  700000,  800000,  900000, 1000000, 1100000, 1200000,
	1300000, 1400000, 1500000, 1600000, 1700000, 1800000, 1900000, 2000000
};

/* Current limits array (in uA) for BMEM, BIO, BPERI.
   Entry indexes corresponds to register values. */
static const int da9063_buck_b_limits[] = {
	1500000, 1600000, 1700000, 1800000, 1900000, 2000000, 2100000, 2200000,
	2300000, 2400000, 2500000, 2600000, 2700000, 2800000, 2900000, 3000000
};

/* Current limits array (in uA) for merged BCORE1 and BCORE2.
   Entry indexes corresponds to register values. */
static const int da9063_bcores_merged_limits[] = {
	1000000, 1200000, 1400000, 1600000, 1800000, 2000000, 2200000, 2400000,
	2600000, 2800000, 3000000, 3200000, 3400000, 3600000, 3800000, 4000000
};

/* Current limits array (in uA) for merged BMEM and BIO.
   Entry indexes corresponds to register values. */
static const int da9063_bmem_bio_merged_limits[] = {
	3000000, 3200000, 3400000, 3600000, 3800000, 4000000, 4200000, 4400000,
	4600000, 4800000, 5000000, 5200000, 5400000, 5600000, 5800000, 6000000
};

static int da9063_set_current_limit(struct regulator_dev *rdev,
							int min_uA, int max_uA)
{
	struct da9063_regulator *regl = rdev_get_drvdata(rdev);
	const struct da9063_regulator_info *rinfo = regl->info;
	int n, tval;

	for (n = 0; n < rinfo->n_current_limits; n++) {
		tval = rinfo->current_limits[n];
		if (tval >= min_uA && tval <= max_uA)
			return regmap_field_write(regl->ilimit, n);
	}

	return -EINVAL;
}

static int da9063_get_current_limit(struct regulator_dev *rdev)
{
	struct da9063_regulator *regl = rdev_get_drvdata(rdev);
	const struct da9063_regulator_info *rinfo = regl->info;
	unsigned int sel;
	int ret;

	ret = regmap_field_read(regl->ilimit, &sel);
	if (ret < 0)
		return ret;

	if (sel >= rinfo->n_current_limits)
		sel = rinfo->n_current_limits - 1;

	return rinfo->current_limits[sel];
}

static int da9063_buck_set_mode(struct regulator_dev *rdev, unsigned mode)
{
	struct da9063_regulator *regl = rdev_get_drvdata(rdev);
	unsigned val;

	switch (mode) {
	case REGULATOR_MODE_FAST:
		val = BUCK_MODE_SYNC;
		break;
	case REGULATOR_MODE_NORMAL:
		val = BUCK_MODE_AUTO;
		break;
	case REGULATOR_MODE_STANDBY:
		val = BUCK_MODE_SLEEP;
		break;
	default:
		return -EINVAL;
	}

	return regmap_field_write(regl->mode, val);
}

/*
 * Bucks use single mode register field for normal operation
 * and suspend state.
 * There are 3 modes to map to: FAST, NORMAL, and STANDBY.
 */

static unsigned da9063_buck_get_mode(struct regulator_dev *rdev)
{
	struct da9063_regulator *regl = rdev_get_drvdata(rdev);
	struct regmap_field *field;
	unsigned int val, mode = 0;
	int ret;

	ret = regmap_field_read(regl->mode, &val);
	if (ret < 0)
		return ret;

	switch (val) {
	default:
	case BUCK_MODE_MANUAL:
		mode = REGULATOR_MODE_FAST | REGULATOR_MODE_STANDBY;
		/* Sleep flag bit decides the mode */
		break;
	case BUCK_MODE_SLEEP:
		return REGULATOR_MODE_STANDBY;
	case BUCK_MODE_SYNC:
		return REGULATOR_MODE_FAST;
	case BUCK_MODE_AUTO:
		return REGULATOR_MODE_NORMAL;
	}

	/* Detect current regulator state */
	ret = regmap_field_read(regl->suspend, &val);
	if (ret < 0)
		return 0;

	/* Read regulator mode from proper register, depending on state */
	if (val)
		field = regl->suspend_sleep;
	else
		field = regl->sleep;

	ret = regmap_field_read(field, &val);
	if (ret < 0)
		return 0;

	if (val)
		mode &= REGULATOR_MODE_STANDBY;
	else
		mode &= REGULATOR_MODE_NORMAL | REGULATOR_MODE_FAST;

	return mode;
}

/*
 * LDOs use sleep flags - one for normal and one for suspend state.
 * There are 2 modes to map to: NORMAL and STANDBY (sleep) for each state.
 */

static int da9063_ldo_set_mode(struct regulator_dev *rdev, unsigned mode)
{
	struct da9063_regulator *regl = rdev_get_drvdata(rdev);
	unsigned val;

	switch (mode) {
	case REGULATOR_MODE_NORMAL:
		val = 0;
		break;
	case REGULATOR_MODE_STANDBY:
		val = 1;
		break;
	default:
		return -EINVAL;
	}

	return regmap_field_write(regl->sleep, val);
}

static unsigned da9063_ldo_get_mode(struct regulator_dev *rdev)
{
	struct da9063_regulator *regl = rdev_get_drvdata(rdev);
	struct regmap_field *field;
	int ret, val;

	/* Detect current regulator state */
	ret = regmap_field_read(regl->suspend, &val);
	if (ret < 0)
		return 0;

	/* Read regulator mode from proper register, depending on state */
	if (val)
		field = regl->suspend_sleep;
	else
		field = regl->sleep;

	ret = regmap_field_read(field, &val);
	if (ret < 0)
		return 0;

	if (val)
		return REGULATOR_MODE_STANDBY;
	else
		return REGULATOR_MODE_NORMAL;
}

static int da9063_buck_get_status(struct regulator_dev *rdev)
{
	int ret = regulator_is_enabled_regmap(rdev);

	if (ret == 0) {
		ret = REGULATOR_STATUS_OFF;
	} else if (ret > 0) {
		ret = da9063_buck_get_mode(rdev);
		if (ret > 0)
			ret = regulator_mode_to_status(ret);
		else if (ret == 0)
			ret = -EIO;
	}

	return ret;
}

static int da9063_ldo_get_status(struct regulator_dev *rdev)
{
	int ret = regulator_is_enabled_regmap(rdev);

	if (ret == 0) {
		ret = REGULATOR_STATUS_OFF;
	} else if (ret > 0) {
		ret = da9063_ldo_get_mode(rdev);
		if (ret > 0)
			ret = regulator_mode_to_status(ret);
		else if (ret == 0)
			ret = -EIO;
	}

	return ret;
}

static int da9063_set_suspend_voltage(struct regulator_dev *rdev, int uV)
{
	struct da9063_regulator *regl = rdev_get_drvdata(rdev);
	const struct da9063_regulator_info *rinfo = regl->info;
	int ret, sel;

	sel = regulator_map_voltage_linear(rdev, uV, uV);
	if (sel < 0)
		return -EINVAL;

	sel <<= ffs(rdev->desc->vsel_mask) - 1;

	ret = regmap_update_bits(regl->hw->regmap, rinfo->suspend_vsel_reg,
				 rdev->desc->vsel_mask, sel);

	return ret;
}

static int da9063_suspend_enable(struct regulator_dev *rdev)
{
	struct da9063_regulator *regl = rdev_get_drvdata(rdev);

	return regmap_field_write(regl->suspend, 1);
}

static int da9063_suspend_disable(struct regulator_dev *rdev)
{
	struct da9063_regulator *regl = rdev_get_drvdata(rdev);

	return regmap_field_write(regl->suspend, 0);
}

static int da9063_buck_set_suspend_mode(struct regulator_dev *rdev, unsigned mode)
{
	struct da9063_regulator *regl = rdev_get_drvdata(rdev);
	int val;

	switch (mode) {
	case REGULATOR_MODE_FAST:
		val = BUCK_MODE_SYNC;
		break;
	case REGULATOR_MODE_NORMAL:
		val = BUCK_MODE_AUTO;
		break;
	case REGULATOR_MODE_STANDBY:
		val = BUCK_MODE_SLEEP;
		break;
	default:
		return -EINVAL;
	}

	return regmap_field_write(regl->mode, val);
}

static int da9063_ldo_set_suspend_mode(struct regulator_dev *rdev, unsigned mode)
{
	struct da9063_regulator *regl = rdev_get_drvdata(rdev);
	unsigned val;

	switch (mode) {
	case REGULATOR_MODE_NORMAL:
		val = 0;
		break;
	case REGULATOR_MODE_STANDBY:
		val = 1;
		break;
	default:
		return -EINVAL;
	}

	return regmap_field_write(regl->suspend_sleep, val);
}

static struct regulator_ops da9063_buck_ops = {
	.enable			= regulator_enable_regmap,
	.disable		= regulator_disable_regmap,
	.is_enabled		= regulator_is_enabled_regmap,
	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
	.list_voltage		= regulator_list_voltage_linear,
	.set_current_limit	= da9063_set_current_limit,
	.get_current_limit	= da9063_get_current_limit,
	.set_mode		= da9063_buck_set_mode,
	.get_mode		= da9063_buck_get_mode,
	.get_status		= da9063_buck_get_status,
	.set_suspend_voltage	= da9063_set_suspend_voltage,
	.set_suspend_enable	= da9063_suspend_enable,
	.set_suspend_disable	= da9063_suspend_disable,
	.set_suspend_mode	= da9063_buck_set_suspend_mode,
};

static struct regulator_ops da9063_ldo_ops = {
	.enable			= regulator_enable_regmap,
	.disable		= regulator_disable_regmap,
	.is_enabled		= regulator_is_enabled_regmap,
	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
	.list_voltage		= regulator_list_voltage_linear,
	.set_mode		= da9063_ldo_set_mode,
	.get_mode		= da9063_ldo_get_mode,
	.get_status		= da9063_ldo_get_status,
	.set_suspend_voltage	= da9063_set_suspend_voltage,
	.set_suspend_enable	= da9063_suspend_enable,
	.set_suspend_disable	= da9063_suspend_disable,
	.set_suspend_mode	= da9063_ldo_set_suspend_mode,
};

/* Info of regulators for DA9063 */
static const struct da9063_regulator_info da9063_regulator_info[] = {
	{
		DA9063_BUCK(DA9063, BCORE1, 300, 10, 1570,
			    da9063_buck_a_limits),
		DA9063_BUCK_COMMON_FIELDS(BCORE1),
		.suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE1_SEL),
		.ilimit = BFIELD(DA9063_REG_BUCK_ILIM_C,
				 DA9063_BCORE1_ILIM_MASK),
	},
	{
		DA9063_BUCK(DA9063, BCORE2, 300, 10, 1570,
			    da9063_buck_a_limits),
		DA9063_BUCK_COMMON_FIELDS(BCORE2),
		.suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE2_SEL),
		.ilimit = BFIELD(DA9063_REG_BUCK_ILIM_C,
				 DA9063_BCORE2_ILIM_MASK),
	},
	{
		DA9063_BUCK(DA9063, BPRO, 530, 10, 1800,
			    da9063_buck_a_limits),
		DA9063_BUCK_COMMON_FIELDS(BPRO),
		.suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBPRO_SEL),
		.ilimit = BFIELD(DA9063_REG_BUCK_ILIM_B,
				 DA9063_BPRO_ILIM_MASK),
	},
	{
		DA9063_BUCK(DA9063, BMEM, 800, 20, 3340,
			    da9063_buck_b_limits),
		DA9063_BUCK_COMMON_FIELDS(BMEM),
		.suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBMEM_SEL),
		.ilimit = BFIELD(DA9063_REG_BUCK_ILIM_A,
				 DA9063_BMEM_ILIM_MASK),
	},
	{
		DA9063_BUCK(DA9063, BIO, 800, 20, 3340,
			    da9063_buck_b_limits),
		DA9063_BUCK_COMMON_FIELDS(BIO),
		.suspend = BFIELD(DA9063_REG_DVC_2, DA9063_VBIO_SEL),
		.ilimit = BFIELD(DA9063_REG_BUCK_ILIM_A,
				 DA9063_BIO_ILIM_MASK),
	},
	{
		DA9063_BUCK(DA9063, BPERI, 800, 20, 3340,
			    da9063_buck_b_limits),
		DA9063_BUCK_COMMON_FIELDS(BPERI),
		.suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBPERI_SEL),
		.ilimit = BFIELD(DA9063_REG_BUCK_ILIM_B,
				 DA9063_BPERI_ILIM_MASK),
	},
	{
		DA9063_BUCK(DA9063, BCORES_MERGED, 300, 10, 1570,
			    da9063_bcores_merged_limits),
		/* BCORES_MERGED uses the same register fields as BCORE1 */
		DA9063_BUCK_COMMON_FIELDS(BCORE1),
		.suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE1_SEL),
		.ilimit = BFIELD(DA9063_REG_BUCK_ILIM_C,
				 DA9063_BCORE1_ILIM_MASK),
	},
	{
		DA9063_BUCK(DA9063, BMEM_BIO_MERGED, 800, 20, 3340,
			    da9063_bmem_bio_merged_limits),
		/* BMEM_BIO_MERGED uses the same register fields as BMEM */
		DA9063_BUCK_COMMON_FIELDS(BMEM),
		.suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBMEM_SEL),
		.ilimit = BFIELD(DA9063_REG_BUCK_ILIM_A,
				 DA9063_BMEM_ILIM_MASK),
	},
	{
		DA9063_LDO(DA9063, LDO1, 600, 20, 1860),
		.suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO1_SEL),
	},
	{
		DA9063_LDO(DA9063, LDO2, 600, 20, 1860),
		.suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO2_SEL),
	},
	{
		DA9063_LDO(DA9063, LDO3, 900, 20, 3440),
		.suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO3_SEL),
		.oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO3_LIM),
	},
	{
		DA9063_LDO(DA9063, LDO4, 900, 20, 3440),
		.suspend = BFIELD(DA9063_REG_DVC_2, DA9063_VLDO4_SEL),
		.oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO4_LIM),
	},
	{
		DA9063_LDO(DA9063, LDO5, 900, 50, 3600),
		.suspend = BFIELD(DA9063_REG_LDO5_CONT, DA9063_VLDO5_SEL),
	},
	{
		DA9063_LDO(DA9063, LDO6, 900, 50, 3600),
		.suspend = BFIELD(DA9063_REG_LDO6_CONT, DA9063_VLDO6_SEL),
	},
	{
		DA9063_LDO(DA9063, LDO7, 900, 50, 3600),
		.suspend = BFIELD(DA9063_REG_LDO7_CONT, DA9063_VLDO7_SEL),
		.oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO7_LIM),
	},
	{
		DA9063_LDO(DA9063, LDO8, 900, 50, 3600),
		.suspend = BFIELD(DA9063_REG_LDO8_CONT, DA9063_VLDO8_SEL),
		.oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO8_LIM),
	},
	{
		DA9063_LDO(DA9063, LDO9, 950, 50, 3600),
		.suspend = BFIELD(DA9063_REG_LDO9_CONT, DA9063_VLDO9_SEL),
	},
	{
		DA9063_LDO(DA9063, LDO10, 900, 50, 3600),
		.suspend = BFIELD(DA9063_REG_LDO10_CONT, DA9063_VLDO10_SEL),
	},
	{
		DA9063_LDO(DA9063, LDO11, 900, 50, 3600),
		.suspend = BFIELD(DA9063_REG_LDO11_CONT, DA9063_VLDO11_SEL),
		.oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO11_LIM),
	},
};

/* Link chip model with regulators info table */
static struct da9063_dev_model regulators_models[] = {
	{
		.regulator_info = da9063_regulator_info,
		.n_regulators = ARRAY_SIZE(da9063_regulator_info),
		.dev_model = PMIC_DA9063,
	},
	{ }
};

/* Regulator interrupt handlers */
static irqreturn_t da9063_ldo_lim_event(int irq, void *data)
{
	struct da9063_regulators *regulators = data;
	struct da9063 *hw = regulators->regulator[0].hw;
	struct da9063_regulator *regl;
	int bits, i , ret;

	ret = regmap_read(hw->regmap, DA9063_REG_STATUS_D, &bits);
	if (ret < 0)
		return IRQ_NONE;

	for (i = regulators->n_regulators - 1; i >= 0; i--) {
		regl = &regulators->regulator[i];
		if (regl->info->oc_event.reg != DA9063_REG_STATUS_D)
			continue;

		if (BIT(regl->info->oc_event.lsb) & bits)
			regulator_notifier_call_chain(regl->rdev,
					REGULATOR_EVENT_OVER_CURRENT, NULL);
	}

	return IRQ_HANDLED;
}

/*
 * Probing and Initialisation functions
 */
static const struct regulator_init_data *da9063_get_regulator_initdata(
		const struct da9063_regulators_pdata *regl_pdata, int id)
{
	int i;

	for (i = 0; i < regl_pdata->n_regulators; i++) {
		if (id == regl_pdata->regulator_data[i].id)
			return regl_pdata->regulator_data[i].initdata;
	}

	return NULL;
}

#ifdef CONFIG_OF
static struct of_regulator_match da9063_matches[] = {
	[DA9063_ID_BCORE1]           = { .name = "bcore1"           },
	[DA9063_ID_BCORE2]           = { .name = "bcore2"           },
	[DA9063_ID_BPRO]             = { .name = "bpro",            },
	[DA9063_ID_BMEM]             = { .name = "bmem",            },
	[DA9063_ID_BIO]              = { .name = "bio",             },
	[DA9063_ID_BPERI]            = { .name = "bperi",           },
	[DA9063_ID_BCORES_MERGED]    = { .name = "bcores-merged"    },
	[DA9063_ID_BMEM_BIO_MERGED]  = { .name = "bmem-bio-merged", },
	[DA9063_ID_LDO1]             = { .name = "ldo1",            },
	[DA9063_ID_LDO2]             = { .name = "ldo2",            },
	[DA9063_ID_LDO3]             = { .name = "ldo3",            },
	[DA9063_ID_LDO4]             = { .name = "ldo4",            },
	[DA9063_ID_LDO5]             = { .name = "ldo5",            },
	[DA9063_ID_LDO6]             = { .name = "ldo6",            },
	[DA9063_ID_LDO7]             = { .name = "ldo7",            },
	[DA9063_ID_LDO8]             = { .name = "ldo8",            },
	[DA9063_ID_LDO9]             = { .name = "ldo9",            },
	[DA9063_ID_LDO10]            = { .name = "ldo10",           },
	[DA9063_ID_LDO11]            = { .name = "ldo11",           },
};

static struct da9063_regulators_pdata *da9063_parse_regulators_dt(
		struct platform_device *pdev,
		struct of_regulator_match **da9063_reg_matches)
{
	struct da9063_regulators_pdata *pdata;
	struct da9063_regulator_data *rdata;
	struct device_node *node;
	int i, n, num;

	node = of_find_node_by_name(pdev->dev.parent->of_node, "regulators");
	if (!node) {
		dev_err(&pdev->dev, "Regulators device node not found\n");
		return ERR_PTR(-ENODEV);
	}

	num = of_regulator_match(&pdev->dev, node, da9063_matches,
				 ARRAY_SIZE(da9063_matches));
	if (num < 0) {
		dev_err(&pdev->dev, "Failed to match regulators\n");
		return ERR_PTR(-EINVAL);
	}

	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
	if (!pdata)
		return ERR_PTR(-ENOMEM);

	pdata->regulator_data = devm_kzalloc(&pdev->dev,
					num * sizeof(*pdata->regulator_data),
					GFP_KERNEL);
	if (!pdata->regulator_data)
		return ERR_PTR(-ENOMEM);
	pdata->n_regulators = num;

	n = 0;
	for (i = 0; i < ARRAY_SIZE(da9063_matches); i++) {
		if (!da9063_matches[i].init_data)
			continue;

		rdata = &pdata->regulator_data[n];
		rdata->id = i;
		rdata->initdata = da9063_matches[i].init_data;

		n++;
	};

	*da9063_reg_matches = da9063_matches;
	return pdata;
}
#else
static struct da9063_regulators_pdata *da9063_parse_regulators_dt(
		struct platform_device *pdev,
		struct of_regulator_match **da9063_reg_matches)
{
	da9063_reg_matches = NULL;
	return ERR_PTR(-ENODEV);
}
#endif

static int da9063_regulator_probe(struct platform_device *pdev)
{
	struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent);
	struct da9063_pdata *da9063_pdata = dev_get_platdata(da9063->dev);
	struct of_regulator_match *da9063_reg_matches;
	struct da9063_regulators_pdata *regl_pdata;
	const struct da9063_dev_model *model;
	struct da9063_regulators *regulators;
	struct da9063_regulator *regl;
	struct regulator_config config;
	bool bcores_merged, bmem_bio_merged;
	int id, irq, n, n_regulators, ret, val;
	size_t size;

	regl_pdata = da9063_pdata ? da9063_pdata->regulators_pdata : NULL;

	if (!regl_pdata)
		regl_pdata = da9063_parse_regulators_dt(pdev,
							&da9063_reg_matches);

	if (IS_ERR(regl_pdata) || regl_pdata->n_regulators == 0) {
		dev_err(&pdev->dev,
			"No regulators defined for the platform\n");
		return PTR_ERR(regl_pdata);
	}

	/* Find regulators set for particular device model */
	for (model = regulators_models; model->regulator_info; model++) {
		if (model->dev_model == da9063->model)
			break;
	}
	if (!model->regulator_info) {
		dev_err(&pdev->dev, "Chip model not recognised (%u)\n",
			da9063->model);
		return -ENODEV;
	}

	ret = regmap_read(da9063->regmap, DA9063_REG_CONFIG_H, &val);
	if (ret < 0) {
		dev_err(&pdev->dev,
			"Error while reading BUCKs configuration\n");
		return -EIO;
	}
	bcores_merged = val & DA9063_BCORE_MERGE;
	bmem_bio_merged = val & DA9063_BUCK_MERGE;

	n_regulators = model->n_regulators;
	if (bcores_merged)
		n_regulators -= 2; /* remove BCORE1, BCORE2 */
	else
		n_regulators--;    /* remove BCORES_MERGED */
	if (bmem_bio_merged)
		n_regulators -= 2; /* remove BMEM, BIO */
	else
		n_regulators--;    /* remove BMEM_BIO_MERGED */

	/* Allocate memory required by usable regulators */
	size = sizeof(struct da9063_regulators) +
		n_regulators * sizeof(struct da9063_regulator);
	regulators = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
	if (!regulators) {
		dev_err(&pdev->dev, "No memory for regulators\n");
		return -ENOMEM;
	}

	regulators->n_regulators = n_regulators;
	platform_set_drvdata(pdev, regulators);

	/* Register all regulators declared in platform information */
	n = 0;
	id = 0;
	while (n < regulators->n_regulators) {
		/* Skip regulator IDs depending on merge mode configuration */
		switch (id) {
		case DA9063_ID_BCORE1:
		case DA9063_ID_BCORE2:
			if (bcores_merged) {
				id++;
				continue;
			}
			break;
		case DA9063_ID_BMEM:
		case DA9063_ID_BIO:
			if (bmem_bio_merged) {
				id++;
				continue;
			}
			break;
		case DA9063_ID_BCORES_MERGED:
			if (!bcores_merged) {
				id++;
				continue;
			}
			break;
		case DA9063_ID_BMEM_BIO_MERGED:
			if (!bmem_bio_merged) {
				id++;
				continue;
			}
			break;
		}

		/* Initialise regulator structure */
		regl = &regulators->regulator[n];
		regl->hw = da9063;
		regl->info = &model->regulator_info[id];
		regl->desc = regl->info->desc;
		regl->desc.type = REGULATOR_VOLTAGE;
		regl->desc.owner = THIS_MODULE;

		if (regl->info->mode.reg)
			regl->mode = devm_regmap_field_alloc(&pdev->dev,
					da9063->regmap, regl->info->mode);
		if (regl->info->suspend.reg)
			regl->suspend = devm_regmap_field_alloc(&pdev->dev,
					da9063->regmap, regl->info->suspend);
		if (regl->info->sleep.reg)
			regl->sleep = devm_regmap_field_alloc(&pdev->dev,
					da9063->regmap, regl->info->sleep);
		if (regl->info->suspend_sleep.reg)
			regl->suspend_sleep = devm_regmap_field_alloc(&pdev->dev,
					da9063->regmap, regl->info->suspend_sleep);
		if (regl->info->ilimit.reg)
			regl->ilimit = devm_regmap_field_alloc(&pdev->dev,
					da9063->regmap, regl->info->ilimit);

		/* Register regulator */
		memset(&config, 0, sizeof(config));
		config.dev = &pdev->dev;
		config.init_data = da9063_get_regulator_initdata(regl_pdata, id);
		config.driver_data = regl;
		if (da9063_reg_matches)
			config.of_node = da9063_reg_matches[id].of_node;
		config.regmap = da9063->regmap;
		regl->rdev = regulator_register(&regl->desc, &config);
		if (IS_ERR(regl->rdev)) {
			dev_err(&pdev->dev,
				"Failed to register %s regulator\n",
				regl->desc.name);
			ret = PTR_ERR(regl->rdev);
			goto err;
		}
		id++;
		n++;
	}

	/* LDOs overcurrent event support */
	irq = platform_get_irq_byname(pdev, "LDO_LIM");
	if (irq < 0) {
		ret = irq;
		dev_err(&pdev->dev, "Failed to get IRQ.\n");
		goto err;
	}

	regulators->irq_ldo_lim = regmap_irq_get_virq(da9063->regmap_irq, irq);
	if (regulators->irq_ldo_lim >= 0) {
		ret = request_threaded_irq(regulators->irq_ldo_lim,
					   NULL, da9063_ldo_lim_event,
					   IRQF_TRIGGER_LOW | IRQF_ONESHOT,
					   "LDO_LIM", regulators);
		if (ret) {
			dev_err(&pdev->dev,
					"Failed to request LDO_LIM IRQ.\n");
			regulators->irq_ldo_lim = -ENXIO;
		}
	}

	return 0;

err:
	/* Wind back regulators registeration */
	while (--n >= 0)
		regulator_unregister(regulators->regulator[n].rdev);

	return ret;
}

static int da9063_regulator_remove(struct platform_device *pdev)
{
	struct da9063_regulators *regulators = platform_get_drvdata(pdev);
	struct da9063_regulator *regl;

	free_irq(regulators->irq_ldo_lim, regulators);
	free_irq(regulators->irq_uvov, regulators);

	for (regl = &regulators->regulator[regulators->n_regulators - 1];
	     regl >= &regulators->regulator[0]; regl--)
		regulator_unregister(regl->rdev);

	return 0;
}

static struct platform_driver da9063_regulator_driver = {
	.driver = {
		.name = DA9063_DRVNAME_REGULATORS,
		.owner = THIS_MODULE,
	},
	.probe = da9063_regulator_probe,
	.remove = da9063_regulator_remove,
};

static int __init da9063_regulator_init(void)
{
	return platform_driver_register(&da9063_regulator_driver);
}
subsys_initcall(da9063_regulator_init);

static void __exit da9063_regulator_cleanup(void)
{
	platform_driver_unregister(&da9063_regulator_driver);
}
module_exit(da9063_regulator_cleanup);


/* Module information */
MODULE_AUTHOR("Krystian Garbaciak <krystian.garbaciak@diasemi.com>");
MODULE_DESCRIPTION("DA9063 regulators driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("paltform:" DA9063_DRVNAME_REGULATORS);