summaryrefslogtreecommitdiffstats
path: root/drivers/regulator/bd71815-regulator.c
blob: acaa6607898ea2e70fcec89d97d3d3ef56209098 (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
// SPDX-License-Identifier: GPL-2.0-only
//
// Copyright 2014 Embest Technology Co. Ltd. Inc.
// bd71815-regulator.c ROHM BD71815 regulator driver
//
// Author: Tony Luo <luofc@embedinfo.com>
//
// Partially rewritten at 2021 by
// Matti Vaittinen <matti.vaitinen@fi.rohmeurope.com>

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/of.h>
#include <linux/gpio/consumer.h>
#include <linux/regulator/driver.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/gpio.h>
#include <linux/mfd/rohm-generic.h>
#include <linux/mfd/rohm-bd71815.h>
#include <linux/regulator/of_regulator.h>

struct bd71815_regulator {
	struct regulator_desc desc;
	const struct rohm_dvs_config *dvs;
};

static const int bd7181x_wled_currents[] = {
	10, 20, 30, 50, 70, 100, 200, 300, 500, 700, 1000, 2000, 3000, 4000,
	5000, 6000, 7000, 8000, 9000, 10000, 11000, 12000, 13000, 14000, 15000,
	16000, 17000, 18000, 19000, 20000, 21000, 22000, 23000, 24000, 25000,
};

static const struct rohm_dvs_config buck1_dvs = {
	.level_map		= ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
				  ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
	.run_reg		= BD71815_REG_BUCK1_VOLT_H,
	.run_mask		= BD71815_VOLT_MASK,
	.run_on_mask		= BD71815_BUCK_RUN_ON,
	.snvs_on_mask		= BD71815_BUCK_SNVS_ON,
	.suspend_reg		= BD71815_REG_BUCK1_VOLT_L,
	.suspend_mask		= BD71815_VOLT_MASK,
	.suspend_on_mask	= BD71815_BUCK_SUSP_ON,
	.lpsr_reg		= BD71815_REG_BUCK1_VOLT_L,
	.lpsr_mask		= BD71815_VOLT_MASK,
	.lpsr_on_mask		= BD71815_BUCK_LPSR_ON,
};

static const struct rohm_dvs_config buck2_dvs = {
	.level_map		= ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
				  ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
	.run_reg		= BD71815_REG_BUCK2_VOLT_H,
	.run_mask		= BD71815_VOLT_MASK,
	.run_on_mask		= BD71815_BUCK_RUN_ON,
	.snvs_on_mask		= BD71815_BUCK_SNVS_ON,
	.suspend_reg		= BD71815_REG_BUCK2_VOLT_L,
	.suspend_mask		= BD71815_VOLT_MASK,
	.suspend_on_mask	= BD71815_BUCK_SUSP_ON,
	.lpsr_reg		= BD71815_REG_BUCK2_VOLT_L,
	.lpsr_mask		= BD71815_VOLT_MASK,
	.lpsr_on_mask		= BD71815_BUCK_LPSR_ON,
};

static const struct rohm_dvs_config buck3_dvs = {
	.level_map		= ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
				  ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
	.run_reg		= BD71815_REG_BUCK3_VOLT,
	.run_mask		= BD71815_VOLT_MASK,
	.run_on_mask		= BD71815_BUCK_RUN_ON,
	.snvs_on_mask		= BD71815_BUCK_SNVS_ON,
	.suspend_on_mask	= BD71815_BUCK_SUSP_ON,
	.lpsr_on_mask		= BD71815_BUCK_LPSR_ON,
};

static const struct rohm_dvs_config buck4_dvs = {
	.level_map		= ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
				  ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
	.run_reg		= BD71815_REG_BUCK4_VOLT,
	.run_mask		= BD71815_VOLT_MASK,
	.run_on_mask		= BD71815_BUCK_RUN_ON,
	.snvs_on_mask		= BD71815_BUCK_SNVS_ON,
	.suspend_on_mask	= BD71815_BUCK_SUSP_ON,
	.lpsr_on_mask		= BD71815_BUCK_LPSR_ON,
};

static const struct rohm_dvs_config ldo1_dvs = {
	.level_map		= ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
				  ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
	.run_reg		= BD71815_REG_LDO_MODE1,
	.run_mask		= BD71815_VOLT_MASK,
	.run_on_mask		= LDO1_RUN_ON,
	.snvs_on_mask		= LDO1_SNVS_ON,
	.suspend_on_mask	= LDO1_SUSP_ON,
	.lpsr_on_mask		= LDO1_LPSR_ON,
};

static const struct rohm_dvs_config ldo2_dvs = {
	.level_map		= ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
				  ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
	.run_reg		= BD71815_REG_LDO_MODE2,
	.run_mask		= BD71815_VOLT_MASK,
	.run_on_mask		= LDO2_RUN_ON,
	.snvs_on_mask		= LDO2_SNVS_ON,
	.suspend_on_mask	= LDO2_SUSP_ON,
	.lpsr_on_mask		= LDO2_LPSR_ON,
};

static const struct rohm_dvs_config ldo3_dvs = {
	.level_map		= ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
				  ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
	.run_reg		= BD71815_REG_LDO_MODE2,
	.run_mask		= BD71815_VOLT_MASK,
	.run_on_mask		= LDO3_RUN_ON,
	.snvs_on_mask		= LDO3_SNVS_ON,
	.suspend_on_mask	= LDO3_SUSP_ON,
	.lpsr_on_mask		= LDO3_LPSR_ON,
};

static const struct rohm_dvs_config ldo4_dvs = {
	.level_map		= ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
				  ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
	.run_reg		= BD71815_REG_LDO_MODE3,
	.run_mask		= BD71815_VOLT_MASK,
	.run_on_mask		= LDO4_RUN_ON,
	.snvs_on_mask		= LDO4_SNVS_ON,
	.suspend_on_mask	= LDO4_SUSP_ON,
	.lpsr_on_mask		= LDO4_LPSR_ON,
};

static const struct rohm_dvs_config ldo5_dvs = {
	.level_map		= ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
				  ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
	.run_reg		= BD71815_REG_LDO_MODE3,
	.run_mask		= BD71815_VOLT_MASK,
	.run_on_mask		= LDO5_RUN_ON,
	.snvs_on_mask		= LDO5_SNVS_ON,
	.suspend_on_mask	= LDO5_SUSP_ON,
	.lpsr_on_mask		= LDO5_LPSR_ON,
};

static const struct rohm_dvs_config dvref_dvs = {
	.level_map		= ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
				  ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
	.run_on_mask		= DVREF_RUN_ON,
	.snvs_on_mask		= DVREF_SNVS_ON,
	.suspend_on_mask	= DVREF_SUSP_ON,
	.lpsr_on_mask		= DVREF_LPSR_ON,
};

static const struct rohm_dvs_config ldolpsr_dvs = {
	.level_map		= ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
				  ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
	.run_on_mask		= DVREF_RUN_ON,
	.snvs_on_mask		= DVREF_SNVS_ON,
	.suspend_on_mask	= DVREF_SUSP_ON,
	.lpsr_on_mask		= DVREF_LPSR_ON,
};

static const struct rohm_dvs_config buck5_dvs = {
	.level_map		= ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
				  ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
	.run_reg		= BD71815_REG_BUCK5_VOLT,
	.run_mask		= BD71815_VOLT_MASK,
	.run_on_mask		= BD71815_BUCK_RUN_ON,
	.snvs_on_mask		= BD71815_BUCK_SNVS_ON,
	.suspend_on_mask	= BD71815_BUCK_SUSP_ON,
	.lpsr_on_mask		= BD71815_BUCK_LPSR_ON,
};

static int set_hw_dvs_levels(struct device_node *np,
			     const struct regulator_desc *desc,
			     struct regulator_config *cfg)
{
	struct bd71815_regulator *data;

	data = container_of(desc, struct bd71815_regulator, desc);
	return rohm_regulator_set_dvs_levels(data->dvs, np, desc, cfg->regmap);
}

/*
 * Bucks 1 and 2 have two voltage selection registers where selected
 * voltage can be set. Which of the registers is used can be either controlled
 * by a control bit in register - or by HW state. If HW state specific voltages
 * are given - then we assume HW state based control should be used.
 *
 * If volatge value is updated to currently selected register - then output
 * voltage is immediately changed no matter what is set as ramp rate. Thus we
 * default changing voltage by writing new value to inactive register and
 * then updating the 'register selection' bit. This naturally only works when
 * HW state machine is not used to select the voltage.
 */
static int buck12_set_hw_dvs_levels(struct device_node *np,
				    const struct regulator_desc *desc,
				    struct regulator_config *cfg)
{
	struct bd71815_regulator *data;
	int ret = 0, val;

	data = container_of(desc, struct bd71815_regulator, desc);

	if (of_find_property(np, "rohm,dvs-run-voltage", NULL) ||
	    of_find_property(np, "rohm,dvs-suspend-voltage", NULL) ||
	    of_find_property(np, "rohm,dvs-lpsr-voltage", NULL) ||
	    of_find_property(np, "rohm,dvs-snvs-voltage", NULL)) {
		ret = regmap_read(cfg->regmap, desc->vsel_reg, &val);
		if (ret)
			return ret;

		if (!(BD71815_BUCK_STBY_DVS & val) &&
		    !(BD71815_BUCK_DVSSEL & val)) {
			int val2;

			/*
			 * We are currently using voltage from _L.
			 * We'd better copy it to _H and switch to it to
			 * avoid shutting us down if LPSR or SUSPEND is set to
			 * disabled. _L value is at reg _H + 1
			 */
			ret = regmap_read(cfg->regmap, desc->vsel_reg + 1,
					  &val2);
			if (ret)
				return ret;

			ret = regmap_update_bits(cfg->regmap, desc->vsel_reg,
						 BD71815_VOLT_MASK |
						 BD71815_BUCK_DVSSEL,
						 val2 | BD71815_BUCK_DVSSEL);
			if (ret)
				return ret;
		}
		ret = rohm_regulator_set_dvs_levels(data->dvs, np, desc,
						    cfg->regmap);
		if (ret)
			return ret;
		/*
		 * DVS levels were given => use HW-state machine for voltage
		 * controls. NOTE: AFAIK, This means that if voltage is changed
		 * by SW the ramp-rate is not respected. Should we disable
		 * SW voltage control when the HW state machine is used?
		 */
		ret = regmap_update_bits(cfg->regmap, desc->vsel_reg,
					 BD71815_BUCK_STBY_DVS,
					 BD71815_BUCK_STBY_DVS);
	}

	return ret;
}

/*
 * BUCK1/2
 * BUCK1RAMPRATE[1:0] BUCK1 DVS ramp rate setting
 * 00: 10.00mV/usec	10mV 1uS
 * 01: 5.00mV/usec	10mV 2uS
 * 10: 2.50mV/usec	10mV 4uS
 * 11: 1.25mV/usec	10mV 8uS
 */
static const unsigned int bd7181x_ramp_table[] = { 1250, 2500, 5000, 10000 };

static int bd7181x_led_set_current_limit(struct regulator_dev *rdev,
					int min_uA, int max_uA)
{
	int ret;
	int onstatus;

	onstatus = regulator_is_enabled_regmap(rdev);

	ret = regulator_set_current_limit_regmap(rdev, min_uA, max_uA);
	if (!ret) {
		int newstatus;

		newstatus = regulator_is_enabled_regmap(rdev);
		if (onstatus != newstatus) {
			/*
			 * HW FIX: spurious led status change detected. Toggle
			 * state as a workaround
			 */
			if (onstatus)
				ret = regulator_enable_regmap(rdev);
			else
				ret = regulator_disable_regmap(rdev);

			if (ret)
				dev_err(rdev_get_dev(rdev),
					"failed to revert the LED state (%d)\n",
					ret);
		}
	}

	return ret;
}

static int bd7181x_buck12_get_voltage_sel(struct regulator_dev *rdev)
{
	int rid = rdev_get_id(rdev);
	int ret, regh, regl, val;

	regh = BD71815_REG_BUCK1_VOLT_H + rid * 0x2;
	regl = BD71815_REG_BUCK1_VOLT_L + rid * 0x2;

	ret = regmap_read(rdev->regmap, regh, &val);
	if (ret)
		return ret;

	/*
	 * If we use HW state machine based voltage reg selection - then we
	 * return BD71815_REG_BUCK1_VOLT_H which is used at RUN.
	 * Else we do return the BD71815_REG_BUCK1_VOLT_H or
	 * BD71815_REG_BUCK1_VOLT_L depending on which is selected to be used
	 * by BD71815_BUCK_DVSSEL bit
	 */
	if ((!(val & BD71815_BUCK_STBY_DVS)) && (!(val & BD71815_BUCK_DVSSEL)))
		ret = regmap_read(rdev->regmap, regl, &val);

	if (ret)
		return ret;

	return val & BD71815_VOLT_MASK;
}

/*
 * For Buck 1/2.
 */
static int bd7181x_buck12_set_voltage_sel(struct regulator_dev *rdev,
					  unsigned int sel)
{
	int rid = rdev_get_id(rdev);
	int ret, val, reg, regh, regl;

	regh = BD71815_REG_BUCK1_VOLT_H + rid*0x2;
	regl = BD71815_REG_BUCK1_VOLT_L + rid*0x2;

	ret = regmap_read(rdev->regmap, regh, &val);
	if (ret)
		return ret;

	/*
	 * If bucks 1 & 2 are controlled by state machine - then the RUN state
	 * voltage is set to BD71815_REG_BUCK1_VOLT_H. Changing SUSPEND/LPSR
	 * voltages at runtime is not supported by this driver.
	 */
	if (((val & BD71815_BUCK_STBY_DVS))) {
		return regmap_update_bits(rdev->regmap, regh, BD71815_VOLT_MASK,
					  sel);
	}
	/* Update new voltage to the register which is not selected now */
	if (val & BD71815_BUCK_DVSSEL)
		reg = regl;
	else
		reg = regh;

	ret = regmap_update_bits(rdev->regmap, reg, BD71815_VOLT_MASK, sel);
	if (ret)
		return ret;

	/* Select the other DVS register to be used */
	return regmap_update_bits(rdev->regmap, regh, BD71815_BUCK_DVSSEL,
				  ~val);
}

static const struct regulator_ops bd7181x_ldo_regulator_ops = {
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,
	.list_voltage = regulator_list_voltage_linear,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
};

static const struct regulator_ops bd7181x_fixed_regulator_ops = {
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,
	.list_voltage = regulator_list_voltage_linear,
};

static const struct regulator_ops bd7181x_buck_regulator_ops = {
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,
	.list_voltage = regulator_list_voltage_linear,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.set_voltage_time_sel = regulator_set_voltage_time_sel,
};

static const struct regulator_ops bd7181x_buck12_regulator_ops = {
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,
	.list_voltage = regulator_list_voltage_linear,
	.set_voltage_sel = bd7181x_buck12_set_voltage_sel,
	.get_voltage_sel = bd7181x_buck12_get_voltage_sel,
	.set_voltage_time_sel = regulator_set_voltage_time_sel,
	.set_ramp_delay = regulator_set_ramp_delay_regmap,
};

static const struct regulator_ops bd7181x_led_regulator_ops = {
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,
	.set_current_limit = bd7181x_led_set_current_limit,
	.get_current_limit = regulator_get_current_limit_regmap,
};

#define BD71815_FIXED_REG(_name, _id, ereg, emsk, voltage, _dvs)	\
	[(_id)] = {							\
		.desc = {						\
			.name = #_name,					\
			.of_match = of_match_ptr(#_name),		\
			.regulators_node = of_match_ptr("regulators"),	\
			.n_voltages = 1,				\
			.ops = &bd7181x_fixed_regulator_ops,		\
			.type = REGULATOR_VOLTAGE,			\
			.id = (_id),					\
			.owner = THIS_MODULE,				\
			.min_uV = (voltage),				\
			.enable_reg = (ereg),				\
			.enable_mask = (emsk),				\
			.of_parse_cb = set_hw_dvs_levels,		\
		},							\
		.dvs = (_dvs),						\
	}

#define BD71815_BUCK_REG(_name, _id, vsel, ereg, min, max, step, _dvs)	\
	[(_id)] = {							\
		.desc = {						\
			.name = #_name,					\
			.of_match = of_match_ptr(#_name),		\
			.regulators_node = of_match_ptr("regulators"),	\
			.n_voltages = ((max) - (min)) / (step) + 1,	\
			.ops = &bd7181x_buck_regulator_ops,		\
			.type = REGULATOR_VOLTAGE,			\
			.id = (_id),					\
			.owner = THIS_MODULE,				\
			.min_uV = (min),				\
			.uV_step = (step),				\
			.vsel_reg = (vsel),				\
			.vsel_mask = BD71815_VOLT_MASK,			\
			.enable_reg = (ereg),				\
			.enable_mask = BD71815_BUCK_RUN_ON,		\
			.of_parse_cb = set_hw_dvs_levels,		\
		},							\
		.dvs = (_dvs),						\
	}

#define BD71815_BUCK12_REG(_name, _id, vsel, ereg, min, max, step,	\
			   _dvs)					\
	[(_id)] = {							\
		.desc = {						\
			.name = #_name,					\
			.of_match = of_match_ptr(#_name),		\
			.regulators_node = of_match_ptr("regulators"),	\
			.n_voltages = ((max) - (min)) / (step) + 1,	\
			.ops = &bd7181x_buck12_regulator_ops,		\
			.type = REGULATOR_VOLTAGE,			\
			.id = (_id),					\
			.owner = THIS_MODULE,				\
			.min_uV = (min),				\
			.uV_step = (step),				\
			.vsel_reg = (vsel),				\
			.vsel_mask = BD71815_VOLT_MASK,			\
			.enable_reg = (ereg),				\
			.enable_mask = BD71815_BUCK_RUN_ON,		\
			.ramp_reg = (ereg),				\
			.ramp_mask = BD71815_BUCK_RAMPRATE_MASK,	\
			.ramp_delay_table = bd7181x_ramp_table,		\
			.n_ramp_values = ARRAY_SIZE(bd7181x_ramp_table),\
			.of_parse_cb = buck12_set_hw_dvs_levels,	\
		},							\
		.dvs = (_dvs),						\
	}

#define BD71815_LED_REG(_name, _id, csel, mask, ereg, emsk, currents)	\
	[(_id)] = {							\
		.desc = {						\
			.name = #_name,					\
			.of_match = of_match_ptr(#_name),		\
			.regulators_node = of_match_ptr("regulators"),	\
			.n_current_limits = ARRAY_SIZE(currents),	\
			.ops = &bd7181x_led_regulator_ops,		\
			.type = REGULATOR_CURRENT,			\
			.id = (_id),					\
			.owner = THIS_MODULE,				\
			.curr_table = currents,				\
			.csel_reg = (csel),				\
			.csel_mask = (mask),				\
			.enable_reg = (ereg),				\
			.enable_mask = (emsk),				\
		},							\
	}

#define BD71815_LDO_REG(_name, _id, vsel, ereg, emsk, min, max, step,	\
			_dvs)						\
	[(_id)] = {							\
		.desc = {						\
			.name = #_name,					\
			.of_match = of_match_ptr(#_name),		\
			.regulators_node = of_match_ptr("regulators"),	\
			.n_voltages = ((max) - (min)) / (step) + 1,	\
			.ops = &bd7181x_ldo_regulator_ops,		\
			.type = REGULATOR_VOLTAGE,			\
			.id = (_id),					\
			.owner = THIS_MODULE,				\
			.min_uV = (min),				\
			.uV_step = (step),				\
			.vsel_reg = (vsel),				\
			.vsel_mask = BD71815_VOLT_MASK,			\
			.enable_reg = (ereg),				\
			.enable_mask = (emsk),				\
			.of_parse_cb = set_hw_dvs_levels,		\
		},							\
		.dvs = (_dvs),						\
	}

static const struct bd71815_regulator bd71815_regulators[] = {
	BD71815_BUCK12_REG(buck1, BD71815_BUCK1, BD71815_REG_BUCK1_VOLT_H,
			   BD71815_REG_BUCK1_MODE, 800000, 2000000, 25000,
			   &buck1_dvs),
	BD71815_BUCK12_REG(buck2, BD71815_BUCK2, BD71815_REG_BUCK2_VOLT_H,
			   BD71815_REG_BUCK2_MODE, 800000, 2000000, 25000,
			   &buck2_dvs),
	BD71815_BUCK_REG(buck3, BD71815_BUCK3, BD71815_REG_BUCK3_VOLT,
			 BD71815_REG_BUCK3_MODE,  1200000, 2700000, 50000,
			 &buck3_dvs),
	BD71815_BUCK_REG(buck4, BD71815_BUCK4, BD71815_REG_BUCK4_VOLT,
			 BD71815_REG_BUCK4_MODE,  1100000, 1850000, 25000,
			 &buck4_dvs),
	BD71815_BUCK_REG(buck5, BD71815_BUCK5, BD71815_REG_BUCK5_VOLT,
			 BD71815_REG_BUCK5_MODE,  1800000, 3300000, 50000,
			 &buck5_dvs),
	BD71815_LDO_REG(ldo1, BD71815_LDO1, BD71815_REG_LDO1_VOLT,
			BD71815_REG_LDO_MODE1, LDO1_RUN_ON, 800000, 3300000,
			50000, &ldo1_dvs),
	BD71815_LDO_REG(ldo2, BD71815_LDO2, BD71815_REG_LDO2_VOLT,
			BD71815_REG_LDO_MODE2, LDO2_RUN_ON, 800000, 3300000,
			50000, &ldo2_dvs),
	/*
	 * Let's default LDO3 to be enabled by SW. We can override ops if DT
	 * says LDO3 should be enabled by HW when DCIN is connected.
	 */
	BD71815_LDO_REG(ldo3, BD71815_LDO3, BD71815_REG_LDO3_VOLT,
			BD71815_REG_LDO_MODE2, LDO3_RUN_ON, 800000, 3300000,
			50000, &ldo3_dvs),
	BD71815_LDO_REG(ldo4, BD71815_LDO4, BD71815_REG_LDO4_VOLT,
			BD71815_REG_LDO_MODE3, LDO4_RUN_ON, 800000, 3300000,
			50000, &ldo4_dvs),
	BD71815_LDO_REG(ldo5, BD71815_LDO5, BD71815_REG_LDO5_VOLT_H,
			BD71815_REG_LDO_MODE3, LDO5_RUN_ON, 800000, 3300000,
			50000, &ldo5_dvs),
	BD71815_FIXED_REG(ldodvref, BD71815_LDODVREF, BD71815_REG_LDO_MODE4,
			  DVREF_RUN_ON, 3000000, &dvref_dvs),
	BD71815_FIXED_REG(ldolpsr, BD71815_LDOLPSR, BD71815_REG_LDO_MODE4,
			  LDO_LPSR_RUN_ON, 1800000, &ldolpsr_dvs),
	BD71815_LED_REG(wled, BD71815_WLED, BD71815_REG_LED_DIMM, LED_DIMM_MASK,
			BD71815_REG_LED_CTRL, LED_RUN_ON,
			bd7181x_wled_currents),
};

static int bd7181x_probe(struct platform_device *pdev)
{
	struct regulator_config config = {};
	int i, ret;
	struct gpio_desc *ldo4_en;
	struct regmap *regmap;

	regmap = dev_get_regmap(pdev->dev.parent, NULL);
	if (!regmap) {
		dev_err(&pdev->dev, "No parent regmap\n");
		return -ENODEV;
	}
	ldo4_en = devm_gpiod_get_from_of_node(&pdev->dev,
					      pdev->dev.parent->of_node,
						 "rohm,vsel-gpios", 0,
						 GPIOD_ASIS, "ldo4-en");

	if (IS_ERR(ldo4_en)) {
		ret = PTR_ERR(ldo4_en);
		if (ret != -ENOENT)
			return ret;
		ldo4_en = NULL;
	}

	/* Disable to go to ship-mode */
	ret = regmap_update_bits(regmap, BD71815_REG_PWRCTRL, RESTARTEN, 0);
	if (ret)
		return ret;

	config.dev = pdev->dev.parent;
	config.regmap = regmap;

	for (i = 0; i < BD71815_REGULATOR_CNT; i++) {
		const struct regulator_desc *desc;
		struct regulator_dev *rdev;

		desc = &bd71815_regulators[i].desc;

		if (i == BD71815_LDO4)
			config.ena_gpiod = ldo4_en;
		else
			config.ena_gpiod = NULL;

		rdev = devm_regulator_register(&pdev->dev, desc, &config);
		if (IS_ERR(rdev)) {
			dev_err(&pdev->dev,
				"failed to register %s regulator\n",
				desc->name);
			return PTR_ERR(rdev);
		}
	}
	return 0;
}

static const struct platform_device_id bd7181x_pmic_id[] = {
	{ "bd71815-pmic", ROHM_CHIP_TYPE_BD71815 },
	{ },
};
MODULE_DEVICE_TABLE(platform, bd7181x_pmic_id);

static struct platform_driver bd7181x_regulator = {
	.driver = {
		.name = "bd7181x-pmic",
	},
	.probe = bd7181x_probe,
	.id_table = bd7181x_pmic_id,
};
module_platform_driver(bd7181x_regulator);

MODULE_AUTHOR("Tony Luo <luofc@embedinfo.com>");
MODULE_DESCRIPTION("BD71815 voltage regulator driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:bd7181x-pmic");