summaryrefslogtreecommitdiff
path: root/drivers/regulator/pf8x00-regulator.c
blob: 9fd8e0949b327f59bd0628521a6461bd477ad17b (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
// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (C) 2017 NXP
 * Copyright (C) 2019 Boundary Devices
 * Copyright (C) 2020 Amarula Solutions(India)
 */

#include <linux/delay.h>
#include <linux/err.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>

/* registers */
#define PF8X00_DEVICEID			0x00
#define PF8X00_REVID			0x01
#define PF8X00_EMREV			0x02
#define PF8X00_PROGID			0x03
#define PF8X00_IMS_INT			0x04
#define PF8X00_IMS_THERM		0x07
#define PF8X00_SW_MODE_INT		0x0a
#define PF8X00_SW_MODE_MASK		0x0b
#define PF8X00_IMS_SW_ILIM		0x12
#define PF8X00_IMS_LDO_ILIM		0x15
#define PF8X00_IMS_SW_UV		0x18
#define PF8X00_IMS_SW_OV		0x1b
#define PF8X00_IMS_LDO_UV		0x1e
#define PF8X00_IMS_LDO_OV		0x21
#define PF8X00_IMS_PWRON		0x24
#define PF8X00_SYS_INT			0x27
#define PF8X00_HARD_FAULT		0x29
#define PF8X00_FSOB_FLAGS		0x2a
#define PF8X00_FSOB_SELECT		0x2b
#define PF8X00_ABIST_OV1		0x2c
#define PF8X00_ABIST_OV2		0x2d
#define PF8X00_ABIST_UV1		0x2e
#define PF8X00_ABIST_UV2		0x2f
#define PF8X00_TEST_FLAGS		0x30
#define PF8X00_ABIST_RUN		0x31
#define PF8X00_RANDOM_GEN		0x33
#define PF8X00_RANDOM_CHK		0x34
#define PF8X00_VMONEN1			0x35
#define PF8X00_VMONEN2			0x36
#define PF8X00_CTRL1			0x37
#define PF8X00_CTRL2			0x38
#define PF8X00_CTRL3			0x39
#define PF8X00_PWRUP_CTRL		0x3a
#define PF8X00_RESETBMCU		0x3c
#define PF8X00_PGOOD			0x3d
#define PF8X00_PWRDN_DLY1		0x3e
#define PF8X00_PWRDN_DLY2		0x3f
#define PF8X00_FREQ_CTRL		0x40
#define PF8X00_COINCELL_CTRL		0x41
#define PF8X00_PWRON			0x42
#define PF8X00_WD_CONFIG		0x43
#define PF8X00_WD_CLEAR			0x44
#define PF8X00_WD_EXPIRE		0x45
#define PF8X00_WD_COUNTER		0x46
#define PF8X00_FAULT_COUNTER		0x47
#define PF8X00_FSAFE_COUNTER		0x48
#define PF8X00_FAULT_TIMER		0x49
#define PF8X00_AMUX			0x4a
#define PF8X00_SW1_CONFIG1		0x4d
#define PF8X00_LDO1_CONFIG1		0x85
#define PF8X00_VSNVS_CONFIG1		0x9d
#define PF8X00_PAGE_SELECT		0x9f

/* regulators */
enum pf8x00_regulators {
	PF8X00_LDO1,
	PF8X00_LDO2,
	PF8X00_LDO3,
	PF8X00_LDO4,
	PF8X00_BUCK1,
	PF8X00_BUCK2,
	PF8X00_BUCK3,
	PF8X00_BUCK4,
	PF8X00_BUCK5,
	PF8X00_BUCK6,
	PF8X00_BUCK7,
	PF8X00_VSNVS,

	PF8X00_MAX_REGULATORS,
};

enum pf8x00_buck_states {
	SW_CONFIG1,
	SW_CONFIG2,
	SW_PWRUP,
	SW_MODE1,
	SW_RUN_VOLT,
	SW_STBY_VOLT,
};
#define PF8X00_SW_BASE(i)		(8 * (i - PF8X00_BUCK1) + PF8X00_SW1_CONFIG1)

enum pf8x00_ldo_states {
	LDO_CONFIG1,
	LDO_CONFIG2,
	LDO_PWRUP,
	LDO_RUN_VOLT,
	LDO_STBY_VOLT,
};
#define PF8X00_LDO_BASE(i)		(6 * (i - PF8X00_LDO1) + PF8X00_LDO1_CONFIG1)

enum swxilim_bits {
	SWXILIM_2100_MA,
	SWXILIM_2600_MA,
	SWXILIM_3000_MA,
	SWXILIM_4500_MA,
};
#define PF8X00_SWXILIM_SHIFT		3
#define PF8X00_SWXILIM_MASK		GENMASK(4, 3)
#define PF8X00_SWXPHASE_MASK		GENMASK(2, 0)
#define PF8X00_SWXPHASE_SHIFT		7

enum pf8x00_devid {
	PF8100			= 0x0,
	PF8121A			= BIT(1),
	PF8200			= BIT(3),
};
#define PF8X00_FAM			BIT(6)
#define PF8X00_DEVICE_FAM_MASK		GENMASK(7, 4)
#define PF8X00_DEVICE_ID_MASK		GENMASK(3, 0)

struct pf8x00_regulator_data {
	struct regulator_desc desc;
	unsigned int suspend_enable_reg;
	unsigned int suspend_enable_mask;
	unsigned int suspend_voltage_reg;
	unsigned int suspend_voltage_cache;
};

struct pf8x00_chip {
	struct regmap *regmap;
	struct device *dev;
};

static const struct regmap_config pf8x00_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
	.max_register = PF8X00_PAGE_SELECT,
	.cache_type = REGCACHE_MAPLE,
};

/* VLDOx output: 1.5V to 5.0V */
static const int pf8x00_ldo_voltages[] = {
	1500000, 1600000, 1800000, 1850000, 2150000, 2500000, 2800000, 3000000,
	3100000, 3150000, 3200000, 3300000, 3350000, 1650000, 1700000, 5000000,
};

/* Output: 2.1A to 4.5A */
static const unsigned int pf8x00_sw_current_table[] = {
	2100000, 2600000, 3000000, 4500000,
};

/* Output: 0.4V to 1.8V */
#define PF8XOO_SW1_6_VOLTAGE_NUM 0xB2
static const struct linear_range pf8x00_sw1_to_6_voltages[] = {
	REGULATOR_LINEAR_RANGE(400000, 0x00, 0xB0, 6250),
	REGULATOR_LINEAR_RANGE(1800000, 0xB1, 0xB1, 0),
};

/* Output: 1.0V to 4.1V */
static const int pf8x00_sw7_voltages[] = {
	1000000, 1100000, 1200000, 1250000, 1300000, 1350000, 1500000, 1600000,
	1800000, 1850000, 2000000, 2100000, 2150000, 2250000, 2300000, 2400000,
	2500000, 2800000, 3150000, 3200000, 3250000, 3300000, 3350000, 3400000,
	3500000, 3800000, 4000000, 4100000, 4100000, 4100000, 4100000, 4100000,
};

/* Output: 1.8V, 3.0V, or 3.3V */
static const int pf8x00_vsnvs_voltages[] = {
	0, 1800000, 3000000, 3300000,
};

static void swxilim_select(struct pf8x00_chip *chip, int id, int ilim)
{
	u8 ilim_sel;
	u8 reg = PF8X00_SW_BASE(id) + SW_CONFIG2;

	switch (ilim) {
	case 2100:
		ilim_sel = SWXILIM_2100_MA;
		break;
	case 2600:
		ilim_sel = SWXILIM_2600_MA;
		break;
	case 3000:
		ilim_sel = SWXILIM_3000_MA;
		break;
	case 4500:
		ilim_sel = SWXILIM_4500_MA;
		break;
	default:
		ilim_sel = SWXILIM_2100_MA;
		break;
	}

	regmap_update_bits(chip->regmap, reg,
					PF8X00_SWXILIM_MASK,
					ilim_sel << PF8X00_SWXILIM_SHIFT);
}

static void handle_ilim_property(struct device_node *np,
			      const struct regulator_desc *desc,
			      struct regulator_config *config)
{
	struct pf8x00_chip *chip = config->driver_data;
	int ret;
	int val;

	if ((desc->id >= PF8X00_BUCK1) && (desc->id <= PF8X00_BUCK7)) {
		ret = of_property_read_u32(np, "nxp,ilim-ma", &val);
		if (ret) {
			dev_dbg(chip->dev, "unspecified ilim for BUCK%d, use value stored in OTP\n",
				desc->id - PF8X00_LDO4);
			return;
		}

		dev_warn(chip->dev, "nxp,ilim-ma is deprecated, please use regulator-max-microamp\n");
		swxilim_select(chip, desc->id, val);

	} else
		dev_warn(chip->dev, "nxp,ilim-ma used with incorrect regulator (%d)\n", desc->id);
}

static void handle_shift_property(struct device_node *np,
			      const struct regulator_desc *desc,
			      struct regulator_config *config)
{
	unsigned char id = desc->id - PF8X00_LDO4;
	unsigned char reg = PF8X00_SW_BASE(id) + SW_CONFIG2;
	struct pf8x00_chip *chip = config->driver_data;

	int phase;
	int val;
	int ret;
	if ((desc->id >= PF8X00_BUCK1) && (desc->id <= PF8X00_BUCK7)) {
		ret = of_property_read_u32(np, "nxp,phase-shift", &val);
		if (ret) {
			dev_dbg(chip->dev,
				"unspecified phase-shift for BUCK%d, using OTP configuration\n",
				id);
			return;
		}

		if (val < 0 || val > 315 || val % 45 != 0) {
			dev_warn(config->dev,
				"invalid phase_shift %d for BUCK%d, using OTP configuration\n",
				val, id);
			return;
		}

		phase = val / 45;

		if (phase >= 1)
			phase -= 1;
		else
			phase = PF8X00_SWXPHASE_SHIFT;

		regmap_update_bits(chip->regmap, reg,
				PF8X00_SWXPHASE_MASK,
				phase);
	} else
		dev_warn(chip->dev, "nxp,phase-shift used with incorrect regulator (%d)\n", id);

}

static int pf8x00_of_parse_cb(struct device_node *np,
			      const struct regulator_desc *desc,
			      struct regulator_config *config)
{

	handle_ilim_property(np, desc, config);
	handle_shift_property(np, desc, config);

	return 0;
}

static int pf8x00_suspend_enable(struct regulator_dev *rdev)
{
	struct pf8x00_regulator_data *regl = rdev_get_drvdata(rdev);
	struct regmap *rmap = rdev_get_regmap(rdev);

	return regmap_update_bits(rmap, regl->suspend_enable_reg,
				  regl->suspend_enable_mask,
				  regl->suspend_enable_mask);
}

static int pf8x00_suspend_disable(struct regulator_dev *rdev)
{
	struct pf8x00_regulator_data *regl = rdev_get_drvdata(rdev);
	struct regmap *rmap = rdev_get_regmap(rdev);

	return regmap_update_bits(rmap, regl->suspend_enable_reg,
				  regl->suspend_enable_mask, 0);
}

static int pf8x00_set_suspend_voltage(struct regulator_dev *rdev, int uV)
{
	struct pf8x00_regulator_data *regl = rdev_get_drvdata(rdev);
	int ret;

	if (regl->suspend_voltage_cache == uV)
		return 0;

	ret = regulator_map_voltage_iterate(rdev, uV, uV);
	if (ret < 0) {
		dev_err(rdev_get_dev(rdev), "failed to map %i uV\n", uV);
		return ret;
	}

	dev_dbg(rdev_get_dev(rdev), "uV: %i, reg: 0x%x, msk: 0x%x, val: 0x%x\n",
		uV, regl->suspend_voltage_reg, regl->desc.vsel_mask, ret);
	ret = regmap_update_bits(rdev->regmap, regl->suspend_voltage_reg,
				 regl->desc.vsel_mask, ret);
	if (ret < 0) {
		dev_err(rdev_get_dev(rdev), "failed to set %i uV\n", uV);
		return ret;
	}

	regl->suspend_voltage_cache = uV;

	return 0;
}

static const struct regulator_ops pf8x00_ldo_ops = {
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,
	.list_voltage = regulator_list_voltage_table,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.set_suspend_enable = pf8x00_suspend_enable,
	.set_suspend_disable = pf8x00_suspend_disable,
	.set_suspend_voltage = pf8x00_set_suspend_voltage,
};


static const struct regulator_ops pf8x00_buck1_6_ops = {
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,
	.list_voltage = regulator_list_voltage_linear_range,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.get_current_limit = regulator_get_current_limit_regmap,
	.set_current_limit = regulator_set_current_limit_regmap,
	.set_suspend_enable = pf8x00_suspend_enable,
	.set_suspend_disable = pf8x00_suspend_disable,
	.set_suspend_voltage = pf8x00_set_suspend_voltage,
};

static const struct regulator_ops pf8x00_buck7_ops = {
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,
	.list_voltage = regulator_list_voltage_table,
	.map_voltage = regulator_map_voltage_ascend,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.get_current_limit = regulator_get_current_limit_regmap,
	.set_current_limit = regulator_set_current_limit_regmap,
	.set_suspend_enable = pf8x00_suspend_enable,
	.set_suspend_disable = pf8x00_suspend_disable,
};

static const struct regulator_ops pf8x00_vsnvs_ops = {
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,
	.list_voltage = regulator_list_voltage_table,
	.map_voltage = regulator_map_voltage_ascend,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
};

#define PF8X00LDO(_id, _name, base, voltages)			\
	[PF8X00_LDO ## _id] = {					\
		.desc = {					\
			.name = _name,				\
			.of_match = _name,			\
			.regulators_node = "regulators",	\
			.n_voltages = ARRAY_SIZE(voltages),	\
			.ops = &pf8x00_ldo_ops,			\
			.type = REGULATOR_VOLTAGE,		\
			.id = PF8X00_LDO ## _id,		\
			.owner = THIS_MODULE,			\
			.volt_table = voltages,			\
			.vsel_reg = (base) + LDO_RUN_VOLT,	\
			.vsel_mask = 0xff,			\
			.enable_reg = (base) + LDO_CONFIG2,	\
			.enable_val = 0x2,			\
			.disable_val = 0x0,			\
			.enable_mask = 2,			\
		},						\
		.suspend_enable_reg = (base) + LDO_CONFIG2,	\
		.suspend_enable_mask = 1,			\
		.suspend_voltage_reg = (base) + LDO_STBY_VOLT,	\
	}

#define PF8X00BUCK(_id, _name, base, voltages)			\
	[PF8X00_BUCK ## _id] = {				\
		.desc = {					\
			.name = _name,				\
			.of_match = _name,			\
			.regulators_node = "regulators",	\
			.of_parse_cb = pf8x00_of_parse_cb,	\
			.n_voltages = PF8XOO_SW1_6_VOLTAGE_NUM,	\
			.ops = &pf8x00_buck1_6_ops,		\
			.type = REGULATOR_VOLTAGE,		\
			.id = PF8X00_BUCK ## _id,		\
			.owner = THIS_MODULE,			\
			.ramp_delay = 19000,			\
			.linear_ranges = pf8x00_sw1_to_6_voltages, \
			.n_linear_ranges = \
				ARRAY_SIZE(pf8x00_sw1_to_6_voltages), \
			.vsel_reg = (base) + SW_RUN_VOLT,	\
			.vsel_mask = 0xff,			\
			.curr_table = pf8x00_sw_current_table, \
			.n_current_limits = \
				ARRAY_SIZE(pf8x00_sw_current_table), \
			.csel_reg = (base) + SW_CONFIG2,	\
			.csel_mask = PF8X00_SWXILIM_MASK,	\
			.enable_reg = (base) + SW_MODE1,	\
			.enable_val = 0x3,			\
			.disable_val = 0x0,			\
			.enable_mask = 0x3,			\
			.enable_time = 500,			\
		},						\
		.suspend_enable_reg = (base) + SW_MODE1,	\
		.suspend_enable_mask = 0xc,			\
		.suspend_voltage_reg = (base) + SW_STBY_VOLT,	\
	}

#define PF8X00BUCK7(_name, base, voltages)			\
	[PF8X00_BUCK7] = {				\
		.desc = {					\
			.name = _name,				\
			.of_match = _name,			\
			.regulators_node = "regulators",	\
			.of_parse_cb = pf8x00_of_parse_cb,	\
			.n_voltages = ARRAY_SIZE(voltages),	\
			.ops = &pf8x00_buck7_ops,		\
			.type = REGULATOR_VOLTAGE,		\
			.id = PF8X00_BUCK7,		\
			.owner = THIS_MODULE,			\
			.ramp_delay = 19000,			\
			.volt_table = voltages,			\
			.vsel_reg = (base) + SW_RUN_VOLT,	\
			.vsel_mask = 0xff,			\
			.curr_table = pf8x00_sw_current_table, \
			.n_current_limits = \
				ARRAY_SIZE(pf8x00_sw_current_table), \
			.csel_reg = (base) + SW_CONFIG2,	\
			.csel_mask = PF8X00_SWXILIM_MASK,	\
			.enable_reg = (base) + SW_MODE1,	\
			.enable_val = 0x3,			\
			.disable_val = 0x0,			\
			.enable_mask = 0x3,			\
			.enable_time = 500,			\
		},						\
	}


#define PF8X00VSNVS(_name, base, voltages)			\
	[PF8X00_VSNVS] = {					\
		.desc = {					\
			.name = _name,				\
			.of_match = _name,			\
			.regulators_node = "regulators",	\
			.n_voltages = ARRAY_SIZE(voltages),	\
			.ops = &pf8x00_vsnvs_ops,		\
			.type = REGULATOR_VOLTAGE,		\
			.id = PF8X00_VSNVS,			\
			.owner = THIS_MODULE,			\
			.volt_table = voltages,			\
			.vsel_reg = (base),			\
			.vsel_mask = 0x3,			\
		},						\
	}

static struct pf8x00_regulator_data pf8x00_regs_data[PF8X00_MAX_REGULATORS] = {
	PF8X00LDO(1, "ldo1", PF8X00_LDO_BASE(PF8X00_LDO1), pf8x00_ldo_voltages),
	PF8X00LDO(2, "ldo2", PF8X00_LDO_BASE(PF8X00_LDO2), pf8x00_ldo_voltages),
	PF8X00LDO(3, "ldo3", PF8X00_LDO_BASE(PF8X00_LDO3), pf8x00_ldo_voltages),
	PF8X00LDO(4, "ldo4", PF8X00_LDO_BASE(PF8X00_LDO4), pf8x00_ldo_voltages),
	PF8X00BUCK(1, "buck1", PF8X00_SW_BASE(PF8X00_BUCK1), pf8x00_sw1_to_6_voltages),
	PF8X00BUCK(2, "buck2", PF8X00_SW_BASE(PF8X00_BUCK2), pf8x00_sw1_to_6_voltages),
	PF8X00BUCK(3, "buck3", PF8X00_SW_BASE(PF8X00_BUCK3), pf8x00_sw1_to_6_voltages),
	PF8X00BUCK(4, "buck4", PF8X00_SW_BASE(PF8X00_BUCK4), pf8x00_sw1_to_6_voltages),
	PF8X00BUCK(5, "buck5", PF8X00_SW_BASE(PF8X00_BUCK5), pf8x00_sw1_to_6_voltages),
	PF8X00BUCK(6, "buck6", PF8X00_SW_BASE(PF8X00_BUCK6), pf8x00_sw1_to_6_voltages),
	PF8X00BUCK7("buck7", PF8X00_SW_BASE(PF8X00_BUCK7), pf8x00_sw7_voltages),
	PF8X00VSNVS("vsnvs", PF8X00_VSNVS_CONFIG1, pf8x00_vsnvs_voltages),
};

static int pf8x00_identify(struct pf8x00_chip *chip)
{
	unsigned int value;
	u8 dev_fam, dev_id;
	const char *name = NULL;
	int ret;

	ret = regmap_read(chip->regmap, PF8X00_DEVICEID, &value);
	if (ret) {
		dev_err(chip->dev, "failed to read chip family\n");
		return ret;
	}

	dev_fam = value & PF8X00_DEVICE_FAM_MASK;
	switch (dev_fam) {
	case PF8X00_FAM:
		break;
	default:
		dev_err(chip->dev,
			"Chip 0x%x is not from PF8X00 family\n", dev_fam);
		return ret;
	}

	dev_id = value & PF8X00_DEVICE_ID_MASK;
	switch (dev_id) {
	case PF8100:
		name = "PF8100";
		break;
	case PF8121A:
		name = "PF8121A";
		break;
	case PF8200:
		name = "PF8200";
		break;
	default:
		dev_err(chip->dev, "Unknown pf8x00 device id 0x%x\n", dev_id);
		return -ENODEV;
	}

	dev_info(chip->dev, "%s PMIC found.\n", name);

	return 0;
}

static int pf8x00_i2c_probe(struct i2c_client *client)
{
	struct regulator_config config = { NULL, };
	struct pf8x00_chip *chip;
	int id;
	int ret;

	chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
	if (!chip)
		return -ENOMEM;

	i2c_set_clientdata(client, chip);
	chip->dev = &client->dev;

	chip->regmap = devm_regmap_init_i2c(client, &pf8x00_regmap_config);
	if (IS_ERR(chip->regmap)) {
		ret = PTR_ERR(chip->regmap);
		dev_err(&client->dev,
			"regmap allocation failed with err %d\n", ret);
		return ret;
	}

	ret = pf8x00_identify(chip);
	if (ret)
		return ret;

	for (id = 0; id < ARRAY_SIZE(pf8x00_regs_data); id++) {
		struct pf8x00_regulator_data *data = &pf8x00_regs_data[id];
		struct regulator_dev *rdev;

		config.dev = chip->dev;
		config.driver_data = data;
		config.regmap = chip->regmap;

		rdev = devm_regulator_register(&client->dev, &data->desc, &config);
		if (IS_ERR(rdev)) {
			dev_err(&client->dev,
				"failed to register %s regulator\n", data->desc.name);
			return PTR_ERR(rdev);
		}
	}

	return 0;
}

static const struct of_device_id pf8x00_dt_ids[] = {
	{ .compatible = "nxp,pf8100",},
	{ .compatible = "nxp,pf8121a",},
	{ .compatible = "nxp,pf8200",},
	{ }
};
MODULE_DEVICE_TABLE(of, pf8x00_dt_ids);

static const struct i2c_device_id pf8x00_i2c_id[] = {
	{ "pf8100", 0 },
	{ "pf8121a", 0 },
	{ "pf8200", 0 },
	{},
};
MODULE_DEVICE_TABLE(i2c, pf8x00_i2c_id);

static struct i2c_driver pf8x00_regulator_driver = {
	.id_table = pf8x00_i2c_id,
	.driver = {
		.name = "pf8x00",
		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
		.of_match_table = pf8x00_dt_ids,
	},
	.probe = pf8x00_i2c_probe,
};
module_i2c_driver(pf8x00_regulator_driver);

MODULE_AUTHOR("Jagan Teki <jagan@amarulasolutions.com>");
MODULE_AUTHOR("Troy Kisky <troy.kisky@boundarydevices.com>");
MODULE_DESCRIPTION("Regulator Driver for NXP's PF8100/PF8121A/PF8200 PMIC");
MODULE_LICENSE("GPL v2");