aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/regulator/tps6507x-regulator.c
blob: 0647552905992348652bc6316e7bec23e3257892 (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
/*
 * tps6507x-regulator.c
 *
 * Regulator driver for TPS65073 PMIC
 *
 * Copyright (C) 2009 Texas Instrument Incorporated - http://www.ti.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.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/tps6507x.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/mfd/tps6507x.h>

/* DCDC's */
#define TPS6507X_DCDC_1				0
#define TPS6507X_DCDC_2				1
#define TPS6507X_DCDC_3				2
/* LDOs */
#define TPS6507X_LDO_1				3
#define TPS6507X_LDO_2				4

#define TPS6507X_MAX_REG_ID			TPS6507X_LDO_2

/* Number of step-down converters available */
#define TPS6507X_NUM_DCDC			3
/* Number of LDO voltage regulators  available */
#define TPS6507X_NUM_LDO			2
/* Number of total regulators available */
#define TPS6507X_NUM_REGULATOR		(TPS6507X_NUM_DCDC + TPS6507X_NUM_LDO)

/* Supported voltage values for regulators (in milliVolts) */
static const u16 VDCDCx_VSEL_table[] = {
	725, 750, 775, 800,
	825, 850, 875, 900,
	925, 950, 975, 1000,
	1025, 1050, 1075, 1100,
	1125, 1150, 1175, 1200,
	1225, 1250, 1275, 1300,
	1325, 1350, 1375, 1400,
	1425, 1450, 1475, 1500,
	1550, 1600, 1650, 1700,
	1750, 1800, 1850, 1900,
	1950, 2000, 2050, 2100,
	2150, 2200, 2250, 2300,
	2350, 2400, 2450, 2500,
	2550, 2600, 2650, 2700,
	2750, 2800, 2850, 2900,
	3000, 3100, 3200, 3300,
};

static const u16 LDO1_VSEL_table[] = {
	1000, 1100, 1200, 1250,
	1300, 1350, 1400, 1500,
	1600, 1800, 2500, 2750,
	2800, 3000, 3100, 3300,
};

static const u16 LDO2_VSEL_table[] = {
	725, 750, 775, 800,
	825, 850, 875, 900,
	925, 950, 975, 1000,
	1025, 1050, 1075, 1100,
	1125, 1150, 1175, 1200,
	1225, 1250, 1275, 1300,
	1325, 1350, 1375, 1400,
	1425, 1450, 1475, 1500,
	1550, 1600, 1650, 1700,
	1750, 1800, 1850, 1900,
	1950, 2000, 2050, 2100,
	2150, 2200, 2250, 2300,
	2350, 2400, 2450, 2500,
	2550, 2600, 2650, 2700,
	2750, 2800, 2850, 2900,
	3000, 3100, 3200, 3300,
};

static unsigned int num_voltages[] = {ARRAY_SIZE(VDCDCx_VSEL_table),
				ARRAY_SIZE(VDCDCx_VSEL_table),
				ARRAY_SIZE(VDCDCx_VSEL_table),
				ARRAY_SIZE(LDO1_VSEL_table),
				ARRAY_SIZE(LDO2_VSEL_table)};

struct tps_info {
	const char *name;
	unsigned min_uV;
	unsigned max_uV;
	u8 table_len;
	const u16 *table;

	/* Does DCDC high or the low register defines output voltage? */
	bool defdcdc_default;
};

static struct tps_info tps6507x_pmic_regs[] = {
	{
		.name = "VDCDC1",
		.min_uV = 725000,
		.max_uV = 3300000,
		.table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
		.table = VDCDCx_VSEL_table,
	},
	{
		.name = "VDCDC2",
		.min_uV = 725000,
		.max_uV = 3300000,
		.table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
		.table = VDCDCx_VSEL_table,
	},
	{
		.name = "VDCDC3",
		.min_uV = 725000,
		.max_uV = 3300000,
		.table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
		.table = VDCDCx_VSEL_table,
	},
	{
		.name = "LDO1",
		.min_uV = 1000000,
		.max_uV = 3300000,
		.table_len = ARRAY_SIZE(LDO1_VSEL_table),
		.table = LDO1_VSEL_table,
	},
	{
		.name = "LDO2",
		.min_uV = 725000,
		.max_uV = 3300000,
		.table_len = ARRAY_SIZE(LDO2_VSEL_table),
		.table = LDO2_VSEL_table,
	},
};

struct tps6507x_pmic {
	struct regulator_desc desc[TPS6507X_NUM_REGULATOR];
	struct tps6507x_dev *mfd;
	struct regulator_dev *rdev[TPS6507X_NUM_REGULATOR];
	struct tps_info *info[TPS6507X_NUM_REGULATOR];
	struct mutex io_lock;
};
static inline int tps6507x_pmic_read(struct tps6507x_pmic *tps, u8 reg)
{
	u8 val;
	int err;

	err = tps->mfd->read_dev(tps->mfd, reg, 1, &val);

	if (err)
		return err;

	return val;
}

static inline int tps6507x_pmic_write(struct tps6507x_pmic *tps, u8 reg, u8 val)
{
	return tps->mfd->write_dev(tps->mfd, reg, 1, &val);
}

static int tps6507x_pmic_set_bits(struct tps6507x_pmic *tps, u8 reg, u8 mask)
{
	int err, data;

	mutex_lock(&tps->io_lock);

	data = tps6507x_pmic_read(tps, reg);
	if (data < 0) {
		dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);
		err = data;
		goto out;
	}

	data |= mask;
	err = tps6507x_pmic_write(tps, reg, data);
	if (err)
		dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);

out:
	mutex_unlock(&tps->io_lock);
	return err;
}

static int tps6507x_pmic_clear_bits(struct tps6507x_pmic *tps, u8 reg, u8 mask)
{
	int err, data;

	mutex_lock(&tps->io_lock);

	data = tps6507x_pmic_read(tps, reg);
	if (data < 0) {
		dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);
		err = data;
		goto out;
	}

	data &= ~mask;
	err = tps6507x_pmic_write(tps, reg, data);
	if (err)
		dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);

out:
	mutex_unlock(&tps->io_lock);
	return err;
}

static int tps6507x_pmic_reg_read(struct tps6507x_pmic *tps, u8 reg)
{
	int data;

	mutex_lock(&tps->io_lock);

	data = tps6507x_pmic_read(tps, reg);
	if (data < 0)
		dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);

	mutex_unlock(&tps->io_lock);
	return data;
}

static int tps6507x_pmic_reg_write(struct tps6507x_pmic *tps, u8 reg, u8 val)
{
	int err;

	mutex_lock(&tps->io_lock);

	err = tps6507x_pmic_write(tps, reg, val);
	if (err < 0)
		dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);

	mutex_unlock(&tps->io_lock);
	return err;
}

static int tps6507x_pmic_dcdc_is_enabled(struct regulator_dev *dev)
{
	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
	int data, dcdc = rdev_get_id(dev);
	u8 shift;

	if (dcdc < TPS6507X_DCDC_1 || dcdc > TPS6507X_DCDC_3)
		return -EINVAL;

	shift = TPS6507X_MAX_REG_ID - dcdc;
	data = tps6507x_pmic_reg_read(tps, TPS6507X_REG_CON_CTRL1);

	if (data < 0)
		return data;
	else
		return (data & 1<<shift) ? 1 : 0;
}

static int tps6507x_pmic_ldo_is_enabled(struct regulator_dev *dev)
{
	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
	int data, ldo = rdev_get_id(dev);
	u8 shift;

	if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
		return -EINVAL;

	shift = TPS6507X_MAX_REG_ID - ldo;
	data = tps6507x_pmic_reg_read(tps, TPS6507X_REG_CON_CTRL1);

	if (data < 0)
		return data;
	else
		return (data & 1<<shift) ? 1 : 0;
}

static int tps6507x_pmic_dcdc_enable(struct regulator_dev *dev)
{
	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
	int dcdc = rdev_get_id(dev);
	u8 shift;

	if (dcdc < TPS6507X_DCDC_1 || dcdc > TPS6507X_DCDC_3)
		return -EINVAL;

	shift = TPS6507X_MAX_REG_ID - dcdc;
	return tps6507x_pmic_set_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift);
}

static int tps6507x_pmic_dcdc_disable(struct regulator_dev *dev)
{
	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
	int dcdc = rdev_get_id(dev);
	u8 shift;

	if (dcdc < TPS6507X_DCDC_1 || dcdc > TPS6507X_DCDC_3)
		return -EINVAL;

	shift = TPS6507X_MAX_REG_ID - dcdc;
	return tps6507x_pmic_clear_bits(tps, TPS6507X_REG_CON_CTRL1,
					1 << shift);
}

static int tps6507x_pmic_ldo_enable(struct regulator_dev *dev)
{
	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
	int ldo = rdev_get_id(dev);
	u8 shift;

	if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
		return -EINVAL;

	shift = TPS6507X_MAX_REG_ID - ldo;
	return tps6507x_pmic_set_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift);
}

static int tps6507x_pmic_ldo_disable(struct regulator_dev *dev)
{
	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
	int ldo = rdev_get_id(dev);
	u8 shift;

	if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
		return -EINVAL;

	shift = TPS6507X_MAX_REG_ID - ldo;
	return tps6507x_pmic_clear_bits(tps, TPS6507X_REG_CON_CTRL1,
					1 << shift);
}

static int tps6507x_pmic_dcdc_get_voltage(struct regulator_dev *dev)
{
	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
	int data, dcdc = rdev_get_id(dev);
	u8 reg;

	switch (dcdc) {
	case TPS6507X_DCDC_1:
		reg = TPS6507X_REG_DEFDCDC1;
		break;
	case TPS6507X_DCDC_2:
		if (tps->info[dcdc]->defdcdc_default)
			reg = TPS6507X_REG_DEFDCDC2_HIGH;
		else
			reg = TPS6507X_REG_DEFDCDC2_LOW;
		break;
	case TPS6507X_DCDC_3:
		if (tps->info[dcdc]->defdcdc_default)
			reg = TPS6507X_REG_DEFDCDC3_HIGH;
		else
			reg = TPS6507X_REG_DEFDCDC3_LOW;
		break;
	default:
		return -EINVAL;
	}

	data = tps6507x_pmic_reg_read(tps, reg);
	if (data < 0)
		return data;

	data &= TPS6507X_DEFDCDCX_DCDC_MASK;
	return tps->info[dcdc]->table[data] * 1000;
}

static int tps6507x_pmic_dcdc_set_voltage(struct regulator_dev *dev,
					  int min_uV, int max_uV,
					  unsigned *selector)
{
	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
	int data, vsel, dcdc = rdev_get_id(dev);
	u8 reg;

	switch (dcdc) {
	case TPS6507X_DCDC_1:
		reg = TPS6507X_REG_DEFDCDC1;
		break;
	case TPS6507X_DCDC_2:
		if (tps->info[dcdc]->defdcdc_default)
			reg = TPS6507X_REG_DEFDCDC2_HIGH;
		else
			reg = TPS6507X_REG_DEFDCDC2_LOW;
		break;
	case TPS6507X_DCDC_3:
		if (tps->info[dcdc]->defdcdc_default)
			reg = TPS6507X_REG_DEFDCDC3_HIGH;
		else
			reg = TPS6507X_REG_DEFDCDC3_LOW;
		break;
	default:
		return -EINVAL;
	}

	if (min_uV < tps->info[dcdc]->min_uV
		|| min_uV > tps->info[dcdc]->max_uV)
		return -EINVAL;
	if (max_uV < tps->info[dcdc]->min_uV
		|| max_uV > tps->info[dcdc]->max_uV)
		return -EINVAL;

	for (vsel = 0; vsel < tps->info[dcdc]->table_len; vsel++) {
		int mV = tps->info[dcdc]->table[vsel];
		int uV = mV * 1000;

		/* Break at the first in-range value */
		if (min_uV <= uV && uV <= max_uV)
			break;
	}

	/* write to the register in case we found a match */
	if (vsel == tps->info[dcdc]->table_len)
		return -EINVAL;

	*selector = vsel;

	data = tps6507x_pmic_reg_read(tps, reg);
	if (data < 0)
		return data;

	data &= ~TPS6507X_DEFDCDCX_DCDC_MASK;
	data |= vsel;

	return tps6507x_pmic_reg_write(tps, reg, data);
}

static int tps6507x_pmic_ldo_get_voltage(struct regulator_dev *dev)
{
	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
	int data, ldo = rdev_get_id(dev);
	u8 reg, mask;

	if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
		return -EINVAL;
	else {
		reg = (ldo == TPS6507X_LDO_1 ?
			TPS6507X_REG_LDO_CTRL1 : TPS6507X_REG_DEFLDO2);
		mask = (ldo == TPS6507X_LDO_1 ?
			TPS6507X_REG_LDO_CTRL1_LDO1_MASK :
				TPS6507X_REG_DEFLDO2_LDO2_MASK);
	}

	data = tps6507x_pmic_reg_read(tps, reg);
	if (data < 0)
		return data;

	data &= mask;
	return tps->info[ldo]->table[data] * 1000;
}

static int tps6507x_pmic_ldo_set_voltage(struct regulator_dev *dev,
					 int min_uV, int max_uV,
					 unsigned *selector)
{
	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
	int data, vsel, ldo = rdev_get_id(dev);
	u8 reg, mask;

	if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
		return -EINVAL;
	else {
		reg = (ldo == TPS6507X_LDO_1 ?
			TPS6507X_REG_LDO_CTRL1 : TPS6507X_REG_DEFLDO2);
		mask = (ldo == TPS6507X_LDO_1 ?
			TPS6507X_REG_LDO_CTRL1_LDO1_MASK :
				TPS6507X_REG_DEFLDO2_LDO2_MASK);
	}

	if (min_uV < tps->info[ldo]->min_uV || min_uV > tps->info[ldo]->max_uV)
		return -EINVAL;
	if (max_uV < tps->info[ldo]->min_uV || max_uV > tps->info[ldo]->max_uV)
		return -EINVAL;

	for (vsel = 0; vsel < tps->info[ldo]->table_len; vsel++) {
		int mV = tps->info[ldo]->table[vsel];
		int uV = mV * 1000;

		/* Break at the first in-range value */
		if (min_uV <= uV && uV <= max_uV)
			break;
	}

	if (vsel == tps->info[ldo]->table_len)
		return -EINVAL;

	*selector = vsel;

	data = tps6507x_pmic_reg_read(tps, reg);
	if (data < 0)
		return data;

	data &= ~mask;
	data |= vsel;

	return tps6507x_pmic_reg_write(tps, reg, data);
}

static int tps6507x_pmic_dcdc_list_voltage(struct regulator_dev *dev,
					unsigned selector)
{
	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
	int dcdc = rdev_get_id(dev);

	if (dcdc < TPS6507X_DCDC_1 || dcdc > TPS6507X_DCDC_3)
		return -EINVAL;

	if (selector >= tps->info[dcdc]->table_len)
		return -EINVAL;
	else
		return tps->info[dcdc]->table[selector] * 1000;
}

static int tps6507x_pmic_ldo_list_voltage(struct regulator_dev *dev,
					unsigned selector)
{
	struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
	int ldo = rdev_get_id(dev);

	if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
		return -EINVAL;

	if (selector >= tps->info[ldo]->table_len)
		return -EINVAL;
	else
		return tps->info[ldo]->table[selector] * 1000;
}

/* Operations permitted on VDCDCx */
static struct regulator_ops tps6507x_pmic_dcdc_ops = {
	.is_enabled = tps6507x_pmic_dcdc_is_enabled,
	.enable = tps6507x_pmic_dcdc_enable,
	.disable = tps6507x_pmic_dcdc_disable,
	.get_voltage = tps6507x_pmic_dcdc_get_voltage,
	.set_voltage = tps6507x_pmic_dcdc_set_voltage,
	.list_voltage = tps6507x_pmic_dcdc_list_voltage,
};

/* Operations permitted on LDOx */
static struct regulator_ops tps6507x_pmic_ldo_ops = {
	.is_enabled = tps6507x_pmic_ldo_is_enabled,
	.enable = tps6507x_pmic_ldo_enable,
	.disable = tps6507x_pmic_ldo_disable,
	.get_voltage = tps6507x_pmic_ldo_get_voltage,
	.set_voltage = tps6507x_pmic_ldo_set_voltage,
	.list_voltage = tps6507x_pmic_ldo_list_voltage,
};

static __devinit
int tps6507x_pmic_probe(struct platform_device *pdev)
{
	struct tps6507x_dev *tps6507x_dev = dev_get_drvdata(pdev->dev.parent);
	static int desc_id;
	struct tps_info *info = &tps6507x_pmic_regs[0];
	struct regulator_init_data *init_data;
	struct regulator_dev *rdev;
	struct tps6507x_pmic *tps;
	struct tps6507x_board *tps_board;
	int i;
	int error;

	/**
	 * tps_board points to pmic related constants
	 * coming from the board-evm file.
	 */

	tps_board = dev_get_platdata(tps6507x_dev->dev);
	if (!tps_board)
		return -EINVAL;

	/**
	 * init_data points to array of regulator_init structures
	 * coming from the board-evm file.
	 */
	init_data = tps_board->tps6507x_pmic_init_data;
	if (!init_data)
		return -EINVAL;

	tps = kzalloc(sizeof(*tps), GFP_KERNEL);
	if (!tps)
		return -ENOMEM;

	mutex_init(&tps->io_lock);

	/* common for all regulators */
	tps->mfd = tps6507x_dev;

	for (i = 0; i < TPS6507X_NUM_REGULATOR; i++, info++, init_data++) {
		/* Register the regulators */
		tps->info[i] = info;
		if (init_data->driver_data) {
			struct tps6507x_reg_platform_data *data =
							init_data->driver_data;
			tps->info[i]->defdcdc_default = data->defdcdc_default;
		}

		tps->desc[i].name = info->name;
		tps->desc[i].id = desc_id++;
		tps->desc[i].n_voltages = num_voltages[i];
		tps->desc[i].ops = (i > TPS6507X_DCDC_3 ?
		&tps6507x_pmic_ldo_ops : &tps6507x_pmic_dcdc_ops);
		tps->desc[i].type = REGULATOR_VOLTAGE;
		tps->desc[i].owner = THIS_MODULE;

		rdev = regulator_register(&tps->desc[i],
					tps6507x_dev->dev, init_data, tps);
		if (IS_ERR(rdev)) {
			dev_err(tps6507x_dev->dev,
				"failed to register %s regulator\n",
				pdev->name);
			error = PTR_ERR(rdev);
			goto fail;
		}

		/* Save regulator for cleanup */
		tps->rdev[i] = rdev;
	}

	tps6507x_dev->pmic = tps;
	platform_set_drvdata(pdev, tps6507x_dev);

	return 0;

fail:
	while (--i >= 0)
		regulator_unregister(tps->rdev[i]);

	kfree(tps);
	return error;
}

static int __devexit tps6507x_pmic_remove(struct platform_device *pdev)
{
	struct tps6507x_dev *tps6507x_dev = platform_get_drvdata(pdev);
	struct tps6507x_pmic *tps = tps6507x_dev->pmic;
	int i;

	for (i = 0; i < TPS6507X_NUM_REGULATOR; i++)
		regulator_unregister(tps->rdev[i]);

	kfree(tps);

	return 0;
}

static struct platform_driver tps6507x_pmic_driver = {
	.driver = {
		.name = "tps6507x-pmic",
		.owner = THIS_MODULE,
	},
	.probe = tps6507x_pmic_probe,
	.remove = __devexit_p(tps6507x_pmic_remove),
};

/**
 * tps6507x_pmic_init
 *
 * Module init function
 */
static int __init tps6507x_pmic_init(void)
{
	return platform_driver_register(&tps6507x_pmic_driver);
}
subsys_initcall(tps6507x_pmic_init);

/**
 * tps6507x_pmic_cleanup
 *
 * Module exit function
 */
static void __exit tps6507x_pmic_cleanup(void)
{
	platform_driver_unregister(&tps6507x_pmic_driver);
}
module_exit(tps6507x_pmic_cleanup);

MODULE_AUTHOR("Texas Instruments");
MODULE_DESCRIPTION("TPS6507x voltage regulator driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:tps6507x-pmic");