summaryrefslogtreecommitdiffstats
path: root/drivers/regulator/s2mps11.c
blob: 02e2fb2fca66fcf692d35ed0b1294274f8ce4ae5 (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
/*
 * s2mps11.c
 *
 * Copyright (c) 2012-2014 Samsung Electronics Co., Ltd
 *              http://www.samsung.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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 */

#include <linux/bug.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regmap.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#include <linux/of_gpio.h>
#include <linux/mfd/samsung/core.h>
#include <linux/mfd/samsung/s2mps11.h>
#include <linux/mfd/samsung/s2mps14.h>

struct s2mps11_info {
	unsigned int rdev_num;
	int ramp_delay2;
	int ramp_delay34;
	int ramp_delay5;
	int ramp_delay16;
	int ramp_delay7810;
	int ramp_delay9;
	/*
	 * One bit for each S2MPS14 regulator whether the suspend mode
	 * was enabled.
	 */
	unsigned int s2mps14_suspend_state:30;
	/* Array of size rdev_num with GPIO-s for external sleep control */
	int *ext_control_gpio;
};

static int get_ramp_delay(int ramp_delay)
{
	unsigned char cnt = 0;

	ramp_delay /= 6250;

	while (true) {
		ramp_delay = ramp_delay >> 1;
		if (ramp_delay == 0)
			break;
		cnt++;
	}

	if (cnt > 3)
		cnt = 3;

	return cnt;
}

static int s2mps11_regulator_set_voltage_time_sel(struct regulator_dev *rdev,
				   unsigned int old_selector,
				   unsigned int new_selector)
{
	struct s2mps11_info *s2mps11 = rdev_get_drvdata(rdev);
	unsigned int ramp_delay = 0;
	int old_volt, new_volt;

	switch (rdev_get_id(rdev)) {
	case S2MPS11_BUCK2:
		ramp_delay = s2mps11->ramp_delay2;
		break;
	case S2MPS11_BUCK3:
	case S2MPS11_BUCK4:
		ramp_delay = s2mps11->ramp_delay34;
		break;
	case S2MPS11_BUCK5:
		ramp_delay = s2mps11->ramp_delay5;
		break;
	case S2MPS11_BUCK6:
	case S2MPS11_BUCK1:
		ramp_delay = s2mps11->ramp_delay16;
		break;
	case S2MPS11_BUCK7:
	case S2MPS11_BUCK8:
	case S2MPS11_BUCK10:
		ramp_delay = s2mps11->ramp_delay7810;
		break;
	case S2MPS11_BUCK9:
		ramp_delay = s2mps11->ramp_delay9;
	}

	if (ramp_delay == 0)
		ramp_delay = rdev->desc->ramp_delay;

	old_volt = rdev->desc->min_uV + (rdev->desc->uV_step * old_selector);
	new_volt = rdev->desc->min_uV + (rdev->desc->uV_step * new_selector);

	return DIV_ROUND_UP(abs(new_volt - old_volt), ramp_delay);
}

static int s2mps11_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
{
	struct s2mps11_info *s2mps11 = rdev_get_drvdata(rdev);
	unsigned int ramp_val, ramp_shift, ramp_reg = S2MPS11_REG_RAMP_BUCK;
	unsigned int ramp_enable = 1, enable_shift = 0;
	int ret;

	switch (rdev_get_id(rdev)) {
	case S2MPS11_BUCK1:
		if (ramp_delay > s2mps11->ramp_delay16)
			s2mps11->ramp_delay16 = ramp_delay;
		else
			ramp_delay = s2mps11->ramp_delay16;

		ramp_shift = S2MPS11_BUCK16_RAMP_SHIFT;
		break;
	case S2MPS11_BUCK2:
		enable_shift = S2MPS11_BUCK2_RAMP_EN_SHIFT;
		if (!ramp_delay) {
			ramp_enable = 0;
			break;
		}

		s2mps11->ramp_delay2 = ramp_delay;
		ramp_shift = S2MPS11_BUCK2_RAMP_SHIFT;
		ramp_reg = S2MPS11_REG_RAMP;
		break;
	case S2MPS11_BUCK3:
		enable_shift = S2MPS11_BUCK3_RAMP_EN_SHIFT;
		if (!ramp_delay) {
			ramp_enable = 0;
			break;
		}

		if (ramp_delay > s2mps11->ramp_delay34)
			s2mps11->ramp_delay34 = ramp_delay;
		else
			ramp_delay = s2mps11->ramp_delay34;

		ramp_shift = S2MPS11_BUCK34_RAMP_SHIFT;
		ramp_reg = S2MPS11_REG_RAMP;
		break;
	case S2MPS11_BUCK4:
		enable_shift = S2MPS11_BUCK4_RAMP_EN_SHIFT;
		if (!ramp_delay) {
			ramp_enable = 0;
			break;
		}

		if (ramp_delay > s2mps11->ramp_delay34)
			s2mps11->ramp_delay34 = ramp_delay;
		else
			ramp_delay = s2mps11->ramp_delay34;

		ramp_shift = S2MPS11_BUCK34_RAMP_SHIFT;
		ramp_reg = S2MPS11_REG_RAMP;
		break;
	case S2MPS11_BUCK5:
		s2mps11->ramp_delay5 = ramp_delay;
		ramp_shift = S2MPS11_BUCK5_RAMP_SHIFT;
		break;
	case S2MPS11_BUCK6:
		enable_shift = S2MPS11_BUCK6_RAMP_EN_SHIFT;
		if (!ramp_delay) {
			ramp_enable = 0;
			break;
		}

		if (ramp_delay > s2mps11->ramp_delay16)
			s2mps11->ramp_delay16 = ramp_delay;
		else
			ramp_delay = s2mps11->ramp_delay16;

		ramp_shift = S2MPS11_BUCK16_RAMP_SHIFT;
		break;
	case S2MPS11_BUCK7:
	case S2MPS11_BUCK8:
	case S2MPS11_BUCK10:
		if (ramp_delay > s2mps11->ramp_delay7810)
			s2mps11->ramp_delay7810 = ramp_delay;
		else
			ramp_delay = s2mps11->ramp_delay7810;

		ramp_shift = S2MPS11_BUCK7810_RAMP_SHIFT;
		break;
	case S2MPS11_BUCK9:
		s2mps11->ramp_delay9 = ramp_delay;
		ramp_shift = S2MPS11_BUCK9_RAMP_SHIFT;
		break;
	default:
		return 0;
	}

	if (!ramp_enable)
		goto ramp_disable;

	/* Ramp delay can be enabled/disabled only for buck[2346] */
	if ((rdev_get_id(rdev) >= S2MPS11_BUCK2 &&
			rdev_get_id(rdev) <= S2MPS11_BUCK4) ||
			rdev_get_id(rdev) == S2MPS11_BUCK6)  {
		ret = regmap_update_bits(rdev->regmap, S2MPS11_REG_RAMP,
					 1 << enable_shift, 1 << enable_shift);
		if (ret) {
			dev_err(&rdev->dev, "failed to enable ramp rate\n");
			return ret;
		}
	}

	ramp_val = get_ramp_delay(ramp_delay);

	return regmap_update_bits(rdev->regmap, ramp_reg, 0x3 << ramp_shift,
				  ramp_val << ramp_shift);

ramp_disable:
	return regmap_update_bits(rdev->regmap, S2MPS11_REG_RAMP,
				  1 << enable_shift, 0);
}

static struct regulator_ops s2mps11_ldo_ops = {
	.list_voltage		= regulator_list_voltage_linear,
	.map_voltage		= regulator_map_voltage_linear,
	.is_enabled		= regulator_is_enabled_regmap,
	.enable			= regulator_enable_regmap,
	.disable		= regulator_disable_regmap,
	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
	.set_voltage_time_sel	= regulator_set_voltage_time_sel,
};

static struct regulator_ops s2mps11_buck_ops = {
	.list_voltage		= regulator_list_voltage_linear,
	.map_voltage		= regulator_map_voltage_linear,
	.is_enabled		= regulator_is_enabled_regmap,
	.enable			= regulator_enable_regmap,
	.disable		= regulator_disable_regmap,
	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
	.set_voltage_time_sel	= s2mps11_regulator_set_voltage_time_sel,
	.set_ramp_delay		= s2mps11_set_ramp_delay,
};

#define regulator_desc_s2mps11_ldo1(num)	{		\
	.name		= "LDO"#num,			\
	.id		= S2MPS11_LDO##num,		\
	.ops		= &s2mps11_ldo_ops,		\
	.type		= REGULATOR_VOLTAGE,		\
	.owner		= THIS_MODULE,			\
	.min_uV		= S2MPS11_LDO_MIN,		\
	.uV_step	= S2MPS11_LDO_STEP1,		\
	.n_voltages	= S2MPS11_LDO_N_VOLTAGES,	\
	.vsel_reg	= S2MPS11_REG_L1CTRL + num - 1,	\
	.vsel_mask	= S2MPS11_LDO_VSEL_MASK,	\
	.enable_reg	= S2MPS11_REG_L1CTRL + num - 1,	\
	.enable_mask	= S2MPS11_ENABLE_MASK		\
}
#define regulator_desc_s2mps11_ldo2(num) {		\
	.name		= "LDO"#num,			\
	.id		= S2MPS11_LDO##num,		\
	.ops		= &s2mps11_ldo_ops,		\
	.type		= REGULATOR_VOLTAGE,		\
	.owner		= THIS_MODULE,			\
	.min_uV		= S2MPS11_LDO_MIN,		\
	.uV_step	= S2MPS11_LDO_STEP2,		\
	.n_voltages	= S2MPS11_LDO_N_VOLTAGES,	\
	.vsel_reg	= S2MPS11_REG_L1CTRL + num - 1,	\
	.vsel_mask	= S2MPS11_LDO_VSEL_MASK,	\
	.enable_reg	= S2MPS11_REG_L1CTRL + num - 1,	\
	.enable_mask	= S2MPS11_ENABLE_MASK		\
}

#define regulator_desc_s2mps11_buck1_4(num) {			\
	.name		= "BUCK"#num,				\
	.id		= S2MPS11_BUCK##num,			\
	.ops		= &s2mps11_buck_ops,			\
	.type		= REGULATOR_VOLTAGE,			\
	.owner		= THIS_MODULE,				\
	.min_uV		= S2MPS11_BUCK_MIN1,			\
	.uV_step	= S2MPS11_BUCK_STEP1,			\
	.n_voltages	= S2MPS11_BUCK_N_VOLTAGES,		\
	.ramp_delay	= S2MPS11_RAMP_DELAY,			\
	.vsel_reg	= S2MPS11_REG_B1CTRL2 + (num - 1) * 2,	\
	.vsel_mask	= S2MPS11_BUCK_VSEL_MASK,		\
	.enable_reg	= S2MPS11_REG_B1CTRL1 + (num - 1) * 2,	\
	.enable_mask	= S2MPS11_ENABLE_MASK			\
}

#define regulator_desc_s2mps11_buck5 {				\
	.name		= "BUCK5",				\
	.id		= S2MPS11_BUCK5,			\
	.ops		= &s2mps11_buck_ops,			\
	.type		= REGULATOR_VOLTAGE,			\
	.owner		= THIS_MODULE,				\
	.min_uV		= S2MPS11_BUCK_MIN1,			\
	.uV_step	= S2MPS11_BUCK_STEP1,			\
	.n_voltages	= S2MPS11_BUCK_N_VOLTAGES,		\
	.ramp_delay	= S2MPS11_RAMP_DELAY,			\
	.vsel_reg	= S2MPS11_REG_B5CTRL2,			\
	.vsel_mask	= S2MPS11_BUCK_VSEL_MASK,		\
	.enable_reg	= S2MPS11_REG_B5CTRL1,			\
	.enable_mask	= S2MPS11_ENABLE_MASK			\
}

#define regulator_desc_s2mps11_buck6_8(num) {			\
	.name		= "BUCK"#num,				\
	.id		= S2MPS11_BUCK##num,			\
	.ops		= &s2mps11_buck_ops,			\
	.type		= REGULATOR_VOLTAGE,			\
	.owner		= THIS_MODULE,				\
	.min_uV		= S2MPS11_BUCK_MIN1,			\
	.uV_step	= S2MPS11_BUCK_STEP1,			\
	.n_voltages	= S2MPS11_BUCK_N_VOLTAGES,		\
	.ramp_delay	= S2MPS11_RAMP_DELAY,			\
	.vsel_reg	= S2MPS11_REG_B6CTRL2 + (num - 6) * 2,	\
	.vsel_mask	= S2MPS11_BUCK_VSEL_MASK,		\
	.enable_reg	= S2MPS11_REG_B6CTRL1 + (num - 6) * 2,	\
	.enable_mask	= S2MPS11_ENABLE_MASK			\
}

#define regulator_desc_s2mps11_buck9 {				\
	.name		= "BUCK9",				\
	.id		= S2MPS11_BUCK9,			\
	.ops		= &s2mps11_buck_ops,			\
	.type		= REGULATOR_VOLTAGE,			\
	.owner		= THIS_MODULE,				\
	.min_uV		= S2MPS11_BUCK_MIN3,			\
	.uV_step	= S2MPS11_BUCK_STEP3,			\
	.n_voltages	= S2MPS11_BUCK_N_VOLTAGES,		\
	.ramp_delay	= S2MPS11_RAMP_DELAY,			\
	.vsel_reg	= S2MPS11_REG_B9CTRL2,			\
	.vsel_mask	= S2MPS11_BUCK_VSEL_MASK,		\
	.enable_reg	= S2MPS11_REG_B9CTRL1,			\
	.enable_mask	= S2MPS11_ENABLE_MASK			\
}

#define regulator_desc_s2mps11_buck10 {				\
	.name		= "BUCK10",				\
	.id		= S2MPS11_BUCK10,			\
	.ops		= &s2mps11_buck_ops,			\
	.type		= REGULATOR_VOLTAGE,			\
	.owner		= THIS_MODULE,				\
	.min_uV		= S2MPS11_BUCK_MIN2,			\
	.uV_step	= S2MPS11_BUCK_STEP2,			\
	.n_voltages	= S2MPS11_BUCK_N_VOLTAGES,		\
	.ramp_delay	= S2MPS11_RAMP_DELAY,			\
	.vsel_reg	= S2MPS11_REG_B10CTRL2,			\
	.vsel_mask	= S2MPS11_BUCK_VSEL_MASK,		\
	.enable_reg	= S2MPS11_REG_B10CTRL1,			\
	.enable_mask	= S2MPS11_ENABLE_MASK			\
}

static const struct regulator_desc s2mps11_regulators[] = {
	regulator_desc_s2mps11_ldo2(1),
	regulator_desc_s2mps11_ldo1(2),
	regulator_desc_s2mps11_ldo1(3),
	regulator_desc_s2mps11_ldo1(4),
	regulator_desc_s2mps11_ldo1(5),
	regulator_desc_s2mps11_ldo2(6),
	regulator_desc_s2mps11_ldo1(7),
	regulator_desc_s2mps11_ldo1(8),
	regulator_desc_s2mps11_ldo1(9),
	regulator_desc_s2mps11_ldo1(10),
	regulator_desc_s2mps11_ldo2(11),
	regulator_desc_s2mps11_ldo1(12),
	regulator_desc_s2mps11_ldo1(13),
	regulator_desc_s2mps11_ldo1(14),
	regulator_desc_s2mps11_ldo1(15),
	regulator_desc_s2mps11_ldo1(16),
	regulator_desc_s2mps11_ldo1(17),
	regulator_desc_s2mps11_ldo1(18),
	regulator_desc_s2mps11_ldo1(19),
	regulator_desc_s2mps11_ldo1(20),
	regulator_desc_s2mps11_ldo1(21),
	regulator_desc_s2mps11_ldo2(22),
	regulator_desc_s2mps11_ldo2(23),
	regulator_desc_s2mps11_ldo1(24),
	regulator_desc_s2mps11_ldo1(25),
	regulator_desc_s2mps11_ldo1(26),
	regulator_desc_s2mps11_ldo2(27),
	regulator_desc_s2mps11_ldo1(28),
	regulator_desc_s2mps11_ldo1(29),
	regulator_desc_s2mps11_ldo1(30),
	regulator_desc_s2mps11_ldo1(31),
	regulator_desc_s2mps11_ldo1(32),
	regulator_desc_s2mps11_ldo1(33),
	regulator_desc_s2mps11_ldo1(34),
	regulator_desc_s2mps11_ldo1(35),
	regulator_desc_s2mps11_ldo1(36),
	regulator_desc_s2mps11_ldo1(37),
	regulator_desc_s2mps11_ldo1(38),
	regulator_desc_s2mps11_buck1_4(1),
	regulator_desc_s2mps11_buck1_4(2),
	regulator_desc_s2mps11_buck1_4(3),
	regulator_desc_s2mps11_buck1_4(4),
	regulator_desc_s2mps11_buck5,
	regulator_desc_s2mps11_buck6_8(6),
	regulator_desc_s2mps11_buck6_8(7),
	regulator_desc_s2mps11_buck6_8(8),
	regulator_desc_s2mps11_buck9,
	regulator_desc_s2mps11_buck10,
};

static int s2mps14_regulator_enable(struct regulator_dev *rdev)
{
	struct s2mps11_info *s2mps11 = rdev_get_drvdata(rdev);
	unsigned int val;

	if (s2mps11->s2mps14_suspend_state & (1 << rdev_get_id(rdev)))
		val = S2MPS14_ENABLE_SUSPEND;
	else if (gpio_is_valid(s2mps11->ext_control_gpio[rdev_get_id(rdev)]))
		val = S2MPS14_ENABLE_EXT_CONTROL;
	else
		val = rdev->desc->enable_mask;

	return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
			rdev->desc->enable_mask, val);
}

static int s2mps14_regulator_set_suspend_disable(struct regulator_dev *rdev)
{
	int ret;
	unsigned int val;
	struct s2mps11_info *s2mps11 = rdev_get_drvdata(rdev);

	/* LDO3 should be always on and does not support suspend mode */
	if (rdev_get_id(rdev) == S2MPS14_LDO3)
		return 0;

	ret = regmap_read(rdev->regmap, rdev->desc->enable_reg, &val);
	if (ret < 0)
		return ret;

	s2mps11->s2mps14_suspend_state |= (1 << rdev_get_id(rdev));
	/*
	 * Don't enable suspend mode if regulator is already disabled because
	 * this would effectively for a short time turn on the regulator after
	 * resuming.
	 * However we still want to toggle the suspend_state bit for regulator
	 * in case if it got enabled before suspending the system.
	 */
	if (!(val & rdev->desc->enable_mask))
		return 0;

	return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
			rdev->desc->enable_mask, S2MPS14_ENABLE_SUSPEND);
}

static struct regulator_ops s2mps14_reg_ops = {
	.list_voltage		= regulator_list_voltage_linear,
	.map_voltage		= regulator_map_voltage_linear,
	.is_enabled		= regulator_is_enabled_regmap,
	.enable			= s2mps14_regulator_enable,
	.disable		= regulator_disable_regmap,
	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
	.set_voltage_time_sel	= regulator_set_voltage_time_sel,
	.set_suspend_disable	= s2mps14_regulator_set_suspend_disable,
};

#define regulator_desc_s2mps14_ldo1(num) {		\
	.name		= "LDO"#num,			\
	.id		= S2MPS14_LDO##num,		\
	.ops		= &s2mps14_reg_ops,		\
	.type		= REGULATOR_VOLTAGE,		\
	.owner		= THIS_MODULE,			\
	.min_uV		= S2MPS14_LDO_MIN_800MV,	\
	.uV_step	= S2MPS14_LDO_STEP_25MV,	\
	.n_voltages	= S2MPS14_LDO_N_VOLTAGES,	\
	.vsel_reg	= S2MPS14_REG_L1CTRL + num - 1,	\
	.vsel_mask	= S2MPS14_LDO_VSEL_MASK,	\
	.enable_reg	= S2MPS14_REG_L1CTRL + num - 1,	\
	.enable_mask	= S2MPS14_ENABLE_MASK		\
}
#define regulator_desc_s2mps14_ldo2(num) {		\
	.name		= "LDO"#num,			\
	.id		= S2MPS14_LDO##num,		\
	.ops		= &s2mps14_reg_ops,		\
	.type		= REGULATOR_VOLTAGE,		\
	.owner		= THIS_MODULE,			\
	.min_uV		= S2MPS14_LDO_MIN_1800MV,	\
	.uV_step	= S2MPS14_LDO_STEP_25MV,	\
	.n_voltages	= S2MPS14_LDO_N_VOLTAGES,	\
	.vsel_reg	= S2MPS14_REG_L1CTRL + num - 1,	\
	.vsel_mask	= S2MPS14_LDO_VSEL_MASK,	\
	.enable_reg	= S2MPS14_REG_L1CTRL + num - 1,	\
	.enable_mask	= S2MPS14_ENABLE_MASK		\
}
#define regulator_desc_s2mps14_ldo3(num) {		\
	.name		= "LDO"#num,			\
	.id		= S2MPS14_LDO##num,		\
	.ops		= &s2mps14_reg_ops,		\
	.type		= REGULATOR_VOLTAGE,		\
	.owner		= THIS_MODULE,			\
	.min_uV		= S2MPS14_LDO_MIN_800MV,	\
	.uV_step	= S2MPS14_LDO_STEP_12_5MV,	\
	.n_voltages	= S2MPS14_LDO_N_VOLTAGES,	\
	.vsel_reg	= S2MPS14_REG_L1CTRL + num - 1,	\
	.vsel_mask	= S2MPS14_LDO_VSEL_MASK,	\
	.enable_reg	= S2MPS14_REG_L1CTRL + num - 1,	\
	.enable_mask	= S2MPS14_ENABLE_MASK		\
}
#define regulator_desc_s2mps14_buck1235(num) {			\
	.name		= "BUCK"#num,				\
	.id		= S2MPS14_BUCK##num,			\
	.ops		= &s2mps14_reg_ops,			\
	.type		= REGULATOR_VOLTAGE,			\
	.owner		= THIS_MODULE,				\
	.min_uV		= S2MPS14_BUCK1235_MIN_600MV,		\
	.uV_step	= S2MPS14_BUCK1235_STEP_6_25MV,		\
	.n_voltages	= S2MPS14_BUCK_N_VOLTAGES,		\
	.linear_min_sel = S2MPS14_BUCK1235_START_SEL,		\
	.ramp_delay	= S2MPS14_BUCK_RAMP_DELAY,		\
	.vsel_reg	= S2MPS14_REG_B1CTRL2 + (num - 1) * 2,	\
	.vsel_mask	= S2MPS14_BUCK_VSEL_MASK,		\
	.enable_reg	= S2MPS14_REG_B1CTRL1 + (num - 1) * 2,	\
	.enable_mask	= S2MPS14_ENABLE_MASK			\
}
#define regulator_desc_s2mps14_buck4(num) {			\
	.name		= "BUCK"#num,				\
	.id		= S2MPS14_BUCK##num,			\
	.ops		= &s2mps14_reg_ops,			\
	.type		= REGULATOR_VOLTAGE,			\
	.owner		= THIS_MODULE,				\
	.min_uV		= S2MPS14_BUCK4_MIN_1400MV,		\
	.uV_step	= S2MPS14_BUCK4_STEP_12_5MV,		\
	.n_voltages	= S2MPS14_BUCK_N_VOLTAGES,		\
	.linear_min_sel = S2MPS14_BUCK4_START_SEL,		\
	.ramp_delay	= S2MPS14_BUCK_RAMP_DELAY,		\
	.vsel_reg	= S2MPS14_REG_B1CTRL2 + (num - 1) * 2,	\
	.vsel_mask	= S2MPS14_BUCK_VSEL_MASK,		\
	.enable_reg	= S2MPS14_REG_B1CTRL1 + (num - 1) * 2,	\
	.enable_mask	= S2MPS14_ENABLE_MASK			\
}

static const struct regulator_desc s2mps14_regulators[] = {
	regulator_desc_s2mps14_ldo3(1),
	regulator_desc_s2mps14_ldo3(2),
	regulator_desc_s2mps14_ldo1(3),
	regulator_desc_s2mps14_ldo1(4),
	regulator_desc_s2mps14_ldo3(5),
	regulator_desc_s2mps14_ldo3(6),
	regulator_desc_s2mps14_ldo1(7),
	regulator_desc_s2mps14_ldo2(8),
	regulator_desc_s2mps14_ldo3(9),
	regulator_desc_s2mps14_ldo3(10),
	regulator_desc_s2mps14_ldo1(11),
	regulator_desc_s2mps14_ldo2(12),
	regulator_desc_s2mps14_ldo2(13),
	regulator_desc_s2mps14_ldo2(14),
	regulator_desc_s2mps14_ldo2(15),
	regulator_desc_s2mps14_ldo2(16),
	regulator_desc_s2mps14_ldo2(17),
	regulator_desc_s2mps14_ldo2(18),
	regulator_desc_s2mps14_ldo1(19),
	regulator_desc_s2mps14_ldo1(20),
	regulator_desc_s2mps14_ldo1(21),
	regulator_desc_s2mps14_ldo3(22),
	regulator_desc_s2mps14_ldo1(23),
	regulator_desc_s2mps14_ldo2(24),
	regulator_desc_s2mps14_ldo2(25),
	regulator_desc_s2mps14_buck1235(1),
	regulator_desc_s2mps14_buck1235(2),
	regulator_desc_s2mps14_buck1235(3),
	regulator_desc_s2mps14_buck4(4),
	regulator_desc_s2mps14_buck1235(5),
};

static int s2mps14_pmic_enable_ext_control(struct s2mps11_info *s2mps11,
		struct regulator_dev *rdev)
{
	return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
			rdev->desc->enable_mask, S2MPS14_ENABLE_EXT_CONTROL);
}

static void s2mps14_pmic_dt_parse_ext_control_gpio(struct platform_device *pdev,
		struct of_regulator_match *rdata, struct s2mps11_info *s2mps11)
{
	int *gpio = s2mps11->ext_control_gpio;
	unsigned int i;
	unsigned int valid_regulators[3] = { S2MPS14_LDO10, S2MPS14_LDO11,
		S2MPS14_LDO12 };

	for (i = 0; i < ARRAY_SIZE(valid_regulators); i++) {
		unsigned int reg = valid_regulators[i];

		if (!rdata[reg].init_data || !rdata[reg].of_node)
			continue;

		gpio[reg] = of_get_named_gpio(rdata[reg].of_node,
				"samsung,ext-control-gpios", 0);
		if (gpio_is_valid(gpio[reg]))
			dev_dbg(&pdev->dev, "Using GPIO %d for ext-control over %d/%s\n",
					gpio[reg], reg, rdata[reg].name);
	}
}

static int s2mps11_pmic_dt_parse(struct platform_device *pdev,
		struct of_regulator_match *rdata, struct s2mps11_info *s2mps11,
		enum sec_device_type dev_type)
{
	struct device_node *reg_np;

	reg_np = of_get_child_by_name(pdev->dev.parent->of_node, "regulators");
	if (!reg_np) {
		dev_err(&pdev->dev, "could not find regulators sub-node\n");
		return -EINVAL;
	}

	of_regulator_match(&pdev->dev, reg_np, rdata, s2mps11->rdev_num);
	if (dev_type == S2MPS14X)
		s2mps14_pmic_dt_parse_ext_control_gpio(pdev, rdata, s2mps11);

	of_node_put(reg_np);

	return 0;
}

static int s2mps11_pmic_probe(struct platform_device *pdev)
{
	struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
	struct sec_platform_data *pdata = NULL;
	struct of_regulator_match *rdata = NULL;
	struct regulator_config config = { };
	struct s2mps11_info *s2mps11;
	int i, ret = 0;
	const struct regulator_desc *regulators;
	enum sec_device_type dev_type;

	s2mps11 = devm_kzalloc(&pdev->dev, sizeof(struct s2mps11_info),
				GFP_KERNEL);
	if (!s2mps11)
		return -ENOMEM;

	dev_type = platform_get_device_id(pdev)->driver_data;
	switch (dev_type) {
	case S2MPS11X:
		s2mps11->rdev_num = ARRAY_SIZE(s2mps11_regulators);
		regulators = s2mps11_regulators;
		break;
	case S2MPS14X:
		s2mps11->rdev_num = ARRAY_SIZE(s2mps14_regulators);
		regulators = s2mps14_regulators;
		break;
	default:
		dev_err(&pdev->dev, "Invalid device type: %u\n", dev_type);
		return -EINVAL;
	};

	s2mps11->ext_control_gpio = devm_kzalloc(&pdev->dev,
			sizeof(*s2mps11->ext_control_gpio) * s2mps11->rdev_num,
			GFP_KERNEL);
	if (!s2mps11->ext_control_gpio)
		return -ENOMEM;
	/*
	 * 0 is a valid GPIO so initialize all GPIO-s to negative value
	 * to indicate that external control won't be used for this regulator.
	 */
	for (i = 0; i < s2mps11->rdev_num; i++)
		s2mps11->ext_control_gpio[i] = -EINVAL;

	if (!iodev->dev->of_node) {
		if (iodev->pdata) {
			pdata = iodev->pdata;
			goto common_reg;
		} else {
			dev_err(pdev->dev.parent,
				"Platform data or DT node not supplied\n");
			return -ENODEV;
		}
	}

	rdata = kzalloc(sizeof(*rdata) * s2mps11->rdev_num, GFP_KERNEL);
	if (!rdata)
		return -ENOMEM;

	for (i = 0; i < s2mps11->rdev_num; i++)
		rdata[i].name = regulators[i].name;

	ret = s2mps11_pmic_dt_parse(pdev, rdata, s2mps11, dev_type);
	if (ret)
		goto out;

common_reg:
	platform_set_drvdata(pdev, s2mps11);

	config.dev = &pdev->dev;
	config.regmap = iodev->regmap_pmic;
	config.driver_data = s2mps11;
	config.ena_gpio_flags = GPIOF_OUT_INIT_HIGH;
	for (i = 0; i < s2mps11->rdev_num; i++) {
		struct regulator_dev *regulator;

		if (pdata) {
			config.init_data = pdata->regulators[i].initdata;
			config.of_node = pdata->regulators[i].reg_node;
		} else {
			config.init_data = rdata[i].init_data;
			config.of_node = rdata[i].of_node;
		}
		config.ena_gpio = s2mps11->ext_control_gpio[i];

		regulator = devm_regulator_register(&pdev->dev,
						&regulators[i], &config);
		if (IS_ERR(regulator)) {
			ret = PTR_ERR(regulator);
			dev_err(&pdev->dev, "regulator init failed for %d\n",
				i);
			goto out;
		}

		if (gpio_is_valid(s2mps11->ext_control_gpio[i])) {
			ret = s2mps14_pmic_enable_ext_control(s2mps11,
					regulator);
			if (ret < 0) {
				dev_err(&pdev->dev,
						"failed to enable GPIO control over %s: %d\n",
						regulator->desc->name, ret);
				goto out;
			}
		}
	}

out:
	kfree(rdata);

	return ret;
}

static const struct platform_device_id s2mps11_pmic_id[] = {
	{ "s2mps11-pmic", S2MPS11X},
	{ "s2mps14-pmic", S2MPS14X},
	{ },
};
MODULE_DEVICE_TABLE(platform, s2mps11_pmic_id);

static struct platform_driver s2mps11_pmic_driver = {
	.driver = {
		.name = "s2mps11-pmic",
		.owner = THIS_MODULE,
	},
	.probe = s2mps11_pmic_probe,
	.id_table = s2mps11_pmic_id,
};

static int __init s2mps11_pmic_init(void)
{
	return platform_driver_register(&s2mps11_pmic_driver);
}
subsys_initcall(s2mps11_pmic_init);

static void __exit s2mps11_pmic_exit(void)
{
	platform_driver_unregister(&s2mps11_pmic_driver);
}
module_exit(s2mps11_pmic_exit);

/* Module information */
MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
MODULE_DESCRIPTION("SAMSUNG S2MPS11/S2MPS14 Regulator Driver");
MODULE_LICENSE("GPL");
OpenPOWER on IntegriCloud