summaryrefslogtreecommitdiffstats
path: root/drivers/regulator/tps80031-regulator.c
blob: 04844780b56c166f0a0ffcf73ba3cd2fc78a4595 (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
/*
 * tps80031-regulator.c -- TI TPS80031 regulator driver.
 *
 * Regulator driver for TITPS80031/TPS80032 Fully Integrated Power
 * Management with Power Path and Battery Charger.
 *
 * Copyright (c) 2012, NVIDIA Corporation.
 *
 * Author: Laxman Dewangan <ldewangan@nvidia.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 version 2.
 *
 * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
 * whether express or implied; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
 * 02111-1307, USA
 */

#include <linux/delay.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/mfd/tps80031.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/slab.h>

/* Flags for DCDC Voltage reading */
#define DCDC_OFFSET_EN		BIT(0)
#define DCDC_EXTENDED_EN	BIT(1)
#define TRACK_MODE_ENABLE	BIT(2)

#define SMPS_MULTOFFSET_VIO	BIT(1)
#define SMPS_MULTOFFSET_SMPS1	BIT(3)
#define SMPS_MULTOFFSET_SMPS2	BIT(4)
#define SMPS_MULTOFFSET_SMPS3	BIT(6)
#define SMPS_MULTOFFSET_SMPS4	BIT(0)

#define SMPS_CMD_MASK		0xC0
#define SMPS_VSEL_MASK		0x3F
#define LDO_VSEL_MASK		0x1F
#define LDO_TRACK_VSEL_MASK	0x3F

#define MISC2_LDOUSB_IN_VSYS	BIT(4)
#define MISC2_LDOUSB_IN_PMID	BIT(3)
#define MISC2_LDOUSB_IN_MASK	0x18

#define MISC2_LDO3_SEL_VIB_VAL	BIT(0)
#define MISC2_LDO3_SEL_VIB_MASK	0x1

#define BOOST_HW_PWR_EN		BIT(5)
#define BOOST_HW_PWR_EN_MASK	BIT(5)

#define OPA_MODE_EN		BIT(6)
#define OPA_MODE_EN_MASK	BIT(6)

#define USB_VBUS_CTRL_SET	0x04
#define USB_VBUS_CTRL_CLR	0x05
#define VBUS_DISCHRG		0x20

struct tps80031_regulator_info {
	/* Regulator register address.*/
	u8		trans_reg;
	u8		state_reg;
	u8		force_reg;
	u8		volt_reg;
	u8		volt_id;

	/*Power request bits */
	int		preq_bit;

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

};

struct tps80031_regulator {
	struct device			*dev;
	struct regulator_dev		*rdev;
	struct tps80031_regulator_info	*rinfo;

	u8				device_flags;
	unsigned int			config_flags;
	unsigned int			ext_ctrl_flag;
};

static inline struct device *to_tps80031_dev(struct regulator_dev *rdev)
{
	return rdev_get_dev(rdev)->parent->parent;
}

static int tps80031_reg_is_enabled(struct regulator_dev *rdev)
{
	struct tps80031_regulator *ri = rdev_get_drvdata(rdev);
	struct device *parent = to_tps80031_dev(rdev);
	u8 reg_val;
	int ret;

	if (ri->ext_ctrl_flag & EXT_PWR_REQ)
		return true;

	ret = tps80031_read(parent, SLAVE_ID1, ri->rinfo->state_reg, &reg_val);
	if (ret < 0) {
		dev_err(&rdev->dev, "Reg 0x%02x read failed, err = %d\n",
			ri->rinfo->state_reg, ret);
		return ret;
	}
	return ((reg_val & STATE_MASK) == STATE_ON);
}

static int tps80031_reg_enable(struct regulator_dev *rdev)
{
	struct tps80031_regulator *ri = rdev_get_drvdata(rdev);
	struct device *parent = to_tps80031_dev(rdev);
	int ret;

	if (ri->ext_ctrl_flag & EXT_PWR_REQ)
		return 0;

	ret = tps80031_update(parent, SLAVE_ID1, ri->rinfo->state_reg,
			STATE_ON, STATE_MASK);
	if (ret < 0) {
		dev_err(&rdev->dev, "Reg 0x%02x update failed, err = %d\n",
			ri->rinfo->state_reg, ret);
		return ret;
	}
	return ret;
}

static int tps80031_reg_disable(struct regulator_dev *rdev)
{
	struct tps80031_regulator *ri = rdev_get_drvdata(rdev);
	struct device *parent = to_tps80031_dev(rdev);
	int ret;

	if (ri->ext_ctrl_flag & EXT_PWR_REQ)
		return 0;

	ret = tps80031_update(parent, SLAVE_ID1, ri->rinfo->state_reg,
			STATE_OFF, STATE_MASK);
	if (ret < 0)
		dev_err(&rdev->dev, "Reg 0x%02x update failed, err = %d\n",
			ri->rinfo->state_reg, ret);
	return ret;
}

/* DCDC voltages for the selector of 58 to 63 */
static int tps80031_dcdc_voltages[4][5] = {
	{ 1350, 1500, 1800, 1900, 2100},
	{ 1350, 1500, 1800, 1900, 2100},
	{ 2084, 2315, 2778, 2932, 3241},
	{ 4167, 2315, 2778, 2932, 3241},
};

static int tps80031_dcdc_list_voltage(struct regulator_dev *rdev, unsigned sel)
{
	struct tps80031_regulator *ri = rdev_get_drvdata(rdev);
	int volt_index = ri->device_flags & 0x3;

	if (sel == 0)
		return 0;
	else if (sel < 58)
		return regulator_list_voltage_linear(rdev, sel - 1);
	else
		return tps80031_dcdc_voltages[volt_index][sel - 58] * 1000;
}

static int tps80031_dcdc_set_voltage_sel(struct regulator_dev *rdev,
		unsigned vsel)
{
	struct tps80031_regulator *ri = rdev_get_drvdata(rdev);
	struct device *parent = to_tps80031_dev(rdev);
	int ret;
	u8 reg_val;

	if (ri->rinfo->force_reg) {
		ret = tps80031_read(parent, ri->rinfo->volt_id,
						ri->rinfo->force_reg, &reg_val);
		if (ret < 0) {
			dev_err(ri->dev, "reg 0x%02x read failed, e = %d\n",
				ri->rinfo->force_reg, ret);
			return ret;
		}
		if (!(reg_val & SMPS_CMD_MASK)) {
			ret = tps80031_update(parent, ri->rinfo->volt_id,
				ri->rinfo->force_reg, vsel, SMPS_VSEL_MASK);
			if (ret < 0)
				dev_err(ri->dev,
					"reg 0x%02x update failed, e = %d\n",
					ri->rinfo->force_reg, ret);
			return ret;
		}
	}
	ret = tps80031_update(parent, ri->rinfo->volt_id,
			ri->rinfo->volt_reg, vsel, SMPS_VSEL_MASK);
	if (ret < 0)
		dev_err(ri->dev, "reg 0x%02x update failed, e = %d\n",
			ri->rinfo->volt_reg, ret);
	return ret;
}

static int tps80031_dcdc_get_voltage_sel(struct regulator_dev *rdev)
{
	struct tps80031_regulator *ri = rdev_get_drvdata(rdev);
	struct device *parent = to_tps80031_dev(rdev);
	uint8_t vsel = 0;
	int ret;

	if (ri->rinfo->force_reg) {
		ret = tps80031_read(parent, ri->rinfo->volt_id,
						ri->rinfo->force_reg, &vsel);
		if (ret < 0) {
			dev_err(ri->dev, "reg 0x%02x read failed, e = %d\n",
					ri->rinfo->force_reg, ret);
			return ret;
		}

		if (!(vsel & SMPS_CMD_MASK))
			return vsel & SMPS_VSEL_MASK;
	}
	ret = tps80031_read(parent, ri->rinfo->volt_id,
				ri->rinfo->volt_reg, &vsel);
	if (ret < 0) {
		dev_err(ri->dev, "reg 0x%02x read failed, e = %d\n",
			ri->rinfo->volt_reg, ret);
		return ret;
	}
	return vsel & SMPS_VSEL_MASK;
}

static int tps80031_ldo_set_voltage_sel(struct regulator_dev *rdev,
		unsigned sel)
{
	struct tps80031_regulator *ri = rdev_get_drvdata(rdev);
	struct device *parent = to_tps80031_dev(rdev);
	int ret;

	/* Check for valid setting for TPS80031 or TPS80032-ES1.0 */
	if ((ri->rinfo->desc.id == TPS80031_REGULATOR_LDO2) &&
			(ri->device_flags & TRACK_MODE_ENABLE)) {
		unsigned nvsel = (sel) & 0x1F;
		if (((tps80031_get_chip_info(parent) == TPS80031) ||
			((tps80031_get_chip_info(parent) == TPS80032) &&
			(tps80031_get_pmu_version(parent) == 0x0))) &&
			((nvsel == 0x0) || (nvsel >= 0x19 && nvsel <= 0x1F))) {
				dev_err(ri->dev,
					"Invalid sel %d in track mode LDO2\n",
					nvsel);
				return -EINVAL;
		}
	}

	ret = tps80031_write(parent, ri->rinfo->volt_id,
			ri->rinfo->volt_reg, sel);
	if (ret < 0)
		dev_err(ri->dev, "Error in writing reg 0x%02x, e = %d\n",
			ri->rinfo->volt_reg, ret);
	return ret;
}

static int tps80031_ldo_get_voltage_sel(struct regulator_dev *rdev)
{
	struct tps80031_regulator *ri = rdev_get_drvdata(rdev);
	struct device *parent = to_tps80031_dev(rdev);
	uint8_t vsel;
	int ret;

	ret = tps80031_read(parent, ri->rinfo->volt_id,
				ri->rinfo->volt_reg, &vsel);
	if (ret < 0) {
		dev_err(ri->dev, "Error in writing the Voltage register\n");
		return ret;
	}
	return vsel & rdev->desc->vsel_mask;
}

static int tps80031_ldo_list_voltage(struct regulator_dev *rdev, unsigned sel)
{
	if (sel == 0)
		return 0;
	else
		return regulator_list_voltage_linear(rdev, sel - 1);
}

static int tps80031_vbus_is_enabled(struct regulator_dev *rdev)
{
	struct tps80031_regulator *ri = rdev_get_drvdata(rdev);
	struct device *parent = to_tps80031_dev(rdev);
	int ret = -EIO;
	uint8_t ctrl1 = 0;
	uint8_t ctrl3 = 0;

	ret = tps80031_read(parent, SLAVE_ID2,
			TPS80031_CHARGERUSB_CTRL1, &ctrl1);
	if (ret < 0) {
		dev_err(ri->dev, "reg 0x%02x read failed, e = %d\n",
			TPS80031_CHARGERUSB_CTRL1, ret);
		return ret;
	}
	ret = tps80031_read(parent, SLAVE_ID2,
				TPS80031_CHARGERUSB_CTRL3, &ctrl3);
	if (ret < 0) {
		dev_err(ri->dev, "reg 0x%02x read failed, e = %d\n",
			TPS80031_CHARGERUSB_CTRL1, ret);
		return ret;
	}
	if ((ctrl1 & OPA_MODE_EN) && (ctrl3 & BOOST_HW_PWR_EN))
		return 1;
	return ret;
}

static int tps80031_vbus_enable(struct regulator_dev *rdev)
{
	struct tps80031_regulator *ri = rdev_get_drvdata(rdev);
	struct device *parent = to_tps80031_dev(rdev);
	int ret;

	ret = tps80031_set_bits(parent, SLAVE_ID2,
				TPS80031_CHARGERUSB_CTRL1, OPA_MODE_EN);
	if (ret < 0) {
		dev_err(ri->dev, "reg 0x%02x read failed, e = %d\n",
					TPS80031_CHARGERUSB_CTRL1, ret);
		return ret;
	}

	ret = tps80031_set_bits(parent, SLAVE_ID2,
				TPS80031_CHARGERUSB_CTRL3, BOOST_HW_PWR_EN);
	if (ret < 0) {
		dev_err(ri->dev, "reg 0x%02x read failed, e = %d\n",
			TPS80031_CHARGERUSB_CTRL3, ret);
		return ret;
	}
	return ret;
}

static int tps80031_vbus_disable(struct regulator_dev *rdev)
{
	struct tps80031_regulator *ri = rdev_get_drvdata(rdev);
	struct device *parent = to_tps80031_dev(rdev);
	int ret = 0;

	if (ri->config_flags & VBUS_DISCHRG_EN_PDN) {
		ret = tps80031_write(parent, SLAVE_ID2,
			USB_VBUS_CTRL_SET, VBUS_DISCHRG);
		if (ret < 0) {
			dev_err(ri->dev, "reg 0x%02x write failed, e = %d\n",
				USB_VBUS_CTRL_SET, ret);
			return ret;
		}
	}

	ret = tps80031_clr_bits(parent, SLAVE_ID2,
			TPS80031_CHARGERUSB_CTRL1,  OPA_MODE_EN);
	if (ret < 0) {
		dev_err(ri->dev, "reg 0x%02x clearbit failed, e = %d\n",
				TPS80031_CHARGERUSB_CTRL1, ret);
		return ret;
	}

	ret = tps80031_clr_bits(parent, SLAVE_ID2,
				TPS80031_CHARGERUSB_CTRL3, BOOST_HW_PWR_EN);
	if (ret < 0) {
		dev_err(ri->dev, "reg 0x%02x clearbit failed, e = %d\n",
				TPS80031_CHARGERUSB_CTRL3, ret);
		return ret;
	}

	mdelay(DIV_ROUND_UP(ri->rinfo->desc.enable_time, 1000));
	if (ri->config_flags & VBUS_DISCHRG_EN_PDN) {
		ret = tps80031_write(parent, SLAVE_ID2,
			USB_VBUS_CTRL_CLR, VBUS_DISCHRG);
		if (ret < 0) {
			dev_err(ri->dev, "reg 0x%02x write failed, e = %d\n",
					USB_VBUS_CTRL_CLR, ret);
			return ret;
		}
	}
	return ret;
}

static struct regulator_ops tps80031_dcdc_ops = {
	.list_voltage		= tps80031_dcdc_list_voltage,
	.set_voltage_sel	= tps80031_dcdc_set_voltage_sel,
	.get_voltage_sel	= tps80031_dcdc_get_voltage_sel,
	.enable		= tps80031_reg_enable,
	.disable	= tps80031_reg_disable,
	.is_enabled	= tps80031_reg_is_enabled,
};

static struct regulator_ops tps80031_ldo_ops = {
	.list_voltage		= tps80031_ldo_list_voltage,
	.set_voltage_sel	= tps80031_ldo_set_voltage_sel,
	.get_voltage_sel	= tps80031_ldo_get_voltage_sel,
	.enable			= tps80031_reg_enable,
	.disable		= tps80031_reg_disable,
	.is_enabled		= tps80031_reg_is_enabled,
};

static struct regulator_ops tps80031_vbus_sw_ops = {
	.enable		= tps80031_vbus_enable,
	.disable	= tps80031_vbus_disable,
	.is_enabled	= tps80031_vbus_is_enabled,
};

static struct regulator_ops tps80031_vbus_hw_ops = {
};

static struct regulator_ops tps80031_ext_reg_ops = {
	.enable		= tps80031_reg_enable,
	.disable	= tps80031_reg_disable,
	.is_enabled	= tps80031_reg_is_enabled,
};

/* Non-exiting default definition for some register */
#define TPS80031_SMPS3_CFG_FORCE	0
#define TPS80031_SMPS4_CFG_FORCE	0

#define TPS80031_VBUS_CFG_TRANS		0
#define TPS80031_VBUS_CFG_STATE		0

#define TPS80031_REG_SMPS(_id, _volt_id, _pbit)	\
{								\
	.trans_reg = TPS80031_##_id##_CFG_TRANS,		\
	.state_reg = TPS80031_##_id##_CFG_STATE,		\
	.force_reg = TPS80031_##_id##_CFG_FORCE,		\
	.volt_reg = TPS80031_##_id##_CFG_VOLTAGE,		\
	.volt_id = SLAVE_##_volt_id,				\
	.preq_bit = _pbit,					\
	.desc = {						\
		.name = "tps80031_"#_id,			\
		.id = TPS80031_REGULATOR_##_id,			\
		.n_voltages = 63,				\
		.ops = &tps80031_dcdc_ops,			\
		.type = REGULATOR_VOLTAGE,			\
		.owner = THIS_MODULE,				\
		.enable_time = 500,				\
	},							\
}

#define TPS80031_REG_LDO(_id, _preq_bit)			\
{								\
	.trans_reg = TPS80031_##_id##_CFG_TRANS,		\
	.state_reg = TPS80031_##_id##_CFG_STATE,		\
	.volt_reg = TPS80031_##_id##_CFG_VOLTAGE,		\
	.volt_id = SLAVE_ID1,					\
	.preq_bit = _preq_bit,					\
	.desc = {						\
		.owner = THIS_MODULE,				\
		.name = "tps80031_"#_id,			\
		.id = TPS80031_REGULATOR_##_id,			\
		.ops = &tps80031_ldo_ops,			\
		.type = REGULATOR_VOLTAGE,			\
		.min_uV = 1000000,				\
		.uV_step = 100000,				\
		.n_voltages = 25,				\
		.vsel_mask = LDO_VSEL_MASK,			\
		.enable_time = 500,				\
	},							\
}

#define TPS80031_REG_FIXED(_id, max_mV, _ops, _delay, _pbit)	\
{								\
	.trans_reg = TPS80031_##_id##_CFG_TRANS,		\
	.state_reg = TPS80031_##_id##_CFG_STATE,		\
	.volt_id = SLAVE_ID1,					\
	.preq_bit = _pbit,					\
	.desc = {						\
		.name = "tps80031_"#_id,			\
		.id = TPS80031_REGULATOR_##_id,			\
		.n_voltages = 2,				\
		.ops = &_ops,					\
		.type = REGULATOR_VOLTAGE,			\
		.owner = THIS_MODULE,				\
		.enable_time = _delay,				\
	},							\
}

static struct tps80031_regulator_info tps80031_rinfo[TPS80031_REGULATOR_MAX] = {
	TPS80031_REG_SMPS(VIO,   ID0, 4),
	TPS80031_REG_SMPS(SMPS1, ID0, 0),
	TPS80031_REG_SMPS(SMPS2, ID0, 1),
	TPS80031_REG_SMPS(SMPS3, ID1, 2),
	TPS80031_REG_SMPS(SMPS4, ID1, 3),
	TPS80031_REG_LDO(VANA,   -1),
	TPS80031_REG_LDO(LDO1,   8),
	TPS80031_REG_LDO(LDO2,   9),
	TPS80031_REG_LDO(LDO3,   10),
	TPS80031_REG_LDO(LDO4,   11),
	TPS80031_REG_LDO(LDO5,   12),
	TPS80031_REG_LDO(LDO6,   13),
	TPS80031_REG_LDO(LDO7,   14),
	TPS80031_REG_LDO(LDOLN,  15),
	TPS80031_REG_LDO(LDOUSB, 5),
	TPS80031_REG_FIXED(VBUS,   5000, tps80031_vbus_hw_ops, 100000, -1),
	TPS80031_REG_FIXED(REGEN1, 3300, tps80031_ext_reg_ops, 0, 16),
	TPS80031_REG_FIXED(REGEN2, 3300, tps80031_ext_reg_ops, 0, 17),
	TPS80031_REG_FIXED(SYSEN,  3300, tps80031_ext_reg_ops, 0, 18),
};

static int tps80031_power_req_config(struct device *parent,
		struct tps80031_regulator *ri,
		struct tps80031_regulator_platform_data *tps80031_pdata)
{
	int ret = 0;

	if (ri->rinfo->preq_bit < 0)
		goto skip_pwr_req_config;

	ret = tps80031_ext_power_req_config(parent, ri->ext_ctrl_flag,
			ri->rinfo->preq_bit, ri->rinfo->state_reg,
			ri->rinfo->trans_reg);
	if (ret < 0) {
		dev_err(ri->dev, "ext powerreq config failed, err = %d\n", ret);
		return ret;
	}

skip_pwr_req_config:
	if (tps80031_pdata->ext_ctrl_flag & PWR_ON_ON_SLEEP) {
		ret = tps80031_update(parent, SLAVE_ID1, ri->rinfo->trans_reg,
				TRANS_SLEEP_ON, TRANS_SLEEP_MASK);
		if (ret < 0) {
			dev_err(ri->dev, "Reg 0x%02x update failed, e %d\n",
					ri->rinfo->trans_reg, ret);
			return ret;
		}
	}
	return ret;
}

static int tps80031_regulator_config(struct device *parent,
		struct tps80031_regulator *ri,
		struct tps80031_regulator_platform_data *tps80031_pdata)
{
	int ret = 0;

	switch (ri->rinfo->desc.id) {
	case TPS80031_REGULATOR_LDOUSB:
		if (ri->config_flags &
			(USBLDO_INPUT_VSYS | USBLDO_INPUT_PMID)) {
			unsigned val = 0;
			if (ri->config_flags & USBLDO_INPUT_VSYS)
				val = MISC2_LDOUSB_IN_VSYS;
			else
				val = MISC2_LDOUSB_IN_PMID;

			ret = tps80031_update(parent, SLAVE_ID1,
				TPS80031_MISC2, val, MISC2_LDOUSB_IN_MASK);
			if (ret < 0) {
				dev_err(ri->dev,
					"LDOUSB config failed, e= %d\n", ret);
				return ret;
			}
		}
		break;

	case TPS80031_REGULATOR_LDO3:
		if (ri->config_flags & LDO3_OUTPUT_VIB) {
			ret = tps80031_update(parent, SLAVE_ID1,
				TPS80031_MISC2, MISC2_LDO3_SEL_VIB_VAL,
				MISC2_LDO3_SEL_VIB_MASK);
			if (ret < 0) {
				dev_err(ri->dev,
					"LDO3 config failed, e = %d\n", ret);
				return ret;
			}
		}
		break;

	case TPS80031_REGULATOR_VBUS:
		/* Provide SW control Ops if VBUS is SW control */
		if (!(ri->config_flags & VBUS_SW_ONLY))
			ri->rinfo->desc.ops = &tps80031_vbus_sw_ops;
		break;
	default:
		break;
	}

	/* Configure Active state to ON, SLEEP to OFF and OFF_state to OFF */
	ret = tps80031_update(parent, SLAVE_ID1, ri->rinfo->trans_reg,
		TRANS_ACTIVE_ON | TRANS_SLEEP_OFF | TRANS_OFF_OFF,
		TRANS_ACTIVE_MASK | TRANS_SLEEP_MASK | TRANS_OFF_MASK);
	if (ret < 0) {
		dev_err(ri->dev, "trans reg update failed, e %d\n", ret);
		return ret;
	}

	return ret;
}

static int check_smps_mode_mult(struct device *parent,
	struct tps80031_regulator *ri)
{
	int mult_offset;
	int ret;
	u8 smps_offset;
	u8 smps_mult;

	ret = tps80031_read(parent, SLAVE_ID1,
			TPS80031_SMPS_OFFSET, &smps_offset);
	if (ret < 0) {
		dev_err(parent, "Error in reading smps offset register\n");
		return ret;
	}

	ret = tps80031_read(parent, SLAVE_ID1,
			TPS80031_SMPS_MULT, &smps_mult);
	if (ret < 0) {
		dev_err(parent, "Error in reading smps mult register\n");
		return ret;
	}

	switch (ri->rinfo->desc.id) {
	case TPS80031_REGULATOR_VIO:
		mult_offset = SMPS_MULTOFFSET_VIO;
		break;
	case TPS80031_REGULATOR_SMPS1:
		mult_offset = SMPS_MULTOFFSET_SMPS1;
		break;
	case TPS80031_REGULATOR_SMPS2:
		mult_offset = SMPS_MULTOFFSET_SMPS2;
		break;
	case TPS80031_REGULATOR_SMPS3:
		mult_offset = SMPS_MULTOFFSET_SMPS3;
		break;
	case TPS80031_REGULATOR_SMPS4:
		mult_offset = SMPS_MULTOFFSET_SMPS4;
		break;
	case TPS80031_REGULATOR_LDO2:
		ri->device_flags = smps_mult & BIT(5) ? TRACK_MODE_ENABLE : 0;
		/* TRACK mode the ldo2 varies from 600mV to 1300mV */
		if (ri->device_flags & TRACK_MODE_ENABLE) {
			ri->rinfo->desc.min_uV = 600000;
			ri->rinfo->desc.uV_step = 12500;
			ri->rinfo->desc.n_voltages = 57;
			ri->rinfo->desc.vsel_mask = LDO_TRACK_VSEL_MASK;
		}
		return 0;
	default:
		return 0;
	}

	ri->device_flags = (smps_offset & mult_offset) ? DCDC_OFFSET_EN : 0;
	ri->device_flags |= (smps_mult & mult_offset) ? DCDC_EXTENDED_EN : 0;
	switch (ri->device_flags) {
	case 0:
		ri->rinfo->desc.min_uV = 607700;
		ri->rinfo->desc.uV_step = 12660;
		break;
	case DCDC_OFFSET_EN:
		ri->rinfo->desc.min_uV = 700000;
		ri->rinfo->desc.uV_step = 12500;
		break;
	case DCDC_EXTENDED_EN:
		ri->rinfo->desc.min_uV = 1852000;
		ri->rinfo->desc.uV_step = 38600;
		break;
	case DCDC_OFFSET_EN | DCDC_EXTENDED_EN:
		ri->rinfo->desc.min_uV = 2161000;
		ri->rinfo->desc.uV_step = 38600;
		break;
	}
	return 0;
}

static int __devinit tps80031_regulator_probe(struct platform_device *pdev)
{
	struct tps80031_platform_data *pdata;
	struct tps80031_regulator_platform_data *tps_pdata;
	struct tps80031_regulator_info *rinfo;
	struct tps80031_regulator *ri;
	struct tps80031_regulator *pmic;
	struct regulator_dev *rdev;
	struct regulator_config config = { };
	int ret;
	int num;

	pdata = dev_get_platdata(pdev->dev.parent);

	if (!pdata) {
		dev_err(&pdev->dev, "No platform data\n");
		return -EINVAL;
	}

	pmic = devm_kzalloc(&pdev->dev,
			TPS80031_REGULATOR_MAX * sizeof(*pmic), GFP_KERNEL);
	if (!pmic) {
		dev_err(&pdev->dev, "mem alloc for pmic failed\n");
		return -ENOMEM;
	}

	for (num = 0; num < TPS80031_REGULATOR_MAX; ++num) {
		tps_pdata = pdata->regulator_pdata[num];
		rinfo = &tps80031_rinfo[num];
		ri = &pmic[num];
		ri->rinfo = rinfo;
		ri->dev = &pdev->dev;

		check_smps_mode_mult(pdev->dev.parent, ri);
		config.dev = &pdev->dev;
		config.init_data = NULL;
		config.driver_data = ri;
		if (tps_pdata) {
			config.init_data = tps_pdata->reg_init_data;
			ri->config_flags = tps_pdata->config_flags;
			ri->ext_ctrl_flag = tps_pdata->ext_ctrl_flag;
			ret = tps80031_regulator_config(pdev->dev.parent,
					ri, tps_pdata);
			if (ret < 0) {
				dev_err(&pdev->dev,
					"regulator config failed, e %d\n", ret);
				goto fail;
			}

			ret = tps80031_power_req_config(pdev->dev.parent,
					ri, tps_pdata);
			if (ret < 0) {
				dev_err(&pdev->dev,
					"pwr_req config failed, err %d\n", ret);
				goto fail;
			}
		}
		rdev = regulator_register(&ri->rinfo->desc, &config);
		if (IS_ERR_OR_NULL(rdev)) {
			dev_err(&pdev->dev,
				"register regulator failed %s\n",
					ri->rinfo->desc.name);
			ret = PTR_ERR(rdev);
			goto fail;
		}
		ri->rdev = rdev;
	}

	platform_set_drvdata(pdev, pmic);
	return 0;
fail:
	while (--num >= 0) {
		ri = &pmic[num];
		regulator_unregister(ri->rdev);
	}
	return ret;
}

static int __devexit tps80031_regulator_remove(struct platform_device *pdev)
{
	struct tps80031_regulator *pmic = platform_get_drvdata(pdev);
	struct tps80031_regulator *ri = NULL;
	int num;

	for (num = 0; num < TPS80031_REGULATOR_MAX; ++num) {
		ri = &pmic[num];
		regulator_unregister(ri->rdev);
	}
	return 0;
}

static struct platform_driver tps80031_regulator_driver = {
	.driver	= {
		.name	= "tps80031-pmic",
		.owner	= THIS_MODULE,
	},
	.probe		= tps80031_regulator_probe,
	.remove		= __devexit_p(tps80031_regulator_remove),
};

static int __init tps80031_regulator_init(void)
{
	return platform_driver_register(&tps80031_regulator_driver);
}
subsys_initcall(tps80031_regulator_init);

static void __exit tps80031_regulator_exit(void)
{
	platform_driver_unregister(&tps80031_regulator_driver);
}
module_exit(tps80031_regulator_exit);

MODULE_ALIAS("platform:tps80031-regulator");
MODULE_DESCRIPTION("Regulator Driver for TI TPS80031 PMIC");
MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
MODULE_LICENSE("GPL v2");