aboutsummaryrefslogtreecommitdiff
path: root/drivers/regulator/mc13783-regulator.c
blob: 4597d508a229efe5bb12a985955ebb71931e3ee4 (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
/*
 * Regulator Driver for Freescale MC13783 PMIC
 *
 * Copyright (C) 2008 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
 * Copyright 2009 Alberto Panizzo <maramaopercheseimorto@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/mfd/mc13783.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/driver.h>
#include <linux/platform_device.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/err.h>

#define MC13783_REG_SWITCHERS5			29
#define MC13783_REG_SWITCHERS5_SW3EN			(1 << 20)
#define MC13783_REG_SWITCHERS5_SW3VSEL			18
#define MC13783_REG_SWITCHERS5_SW3VSEL_M		(3 << 18)

#define MC13783_REG_REGULATORSETTING0		30
#define MC13783_REG_REGULATORSETTING0_VIOLOVSEL		2
#define MC13783_REG_REGULATORSETTING0_VDIGVSEL		4
#define MC13783_REG_REGULATORSETTING0_VGENVSEL		6
#define MC13783_REG_REGULATORSETTING0_VRFDIGVSEL	9
#define MC13783_REG_REGULATORSETTING0_VRFREFVSEL	11
#define MC13783_REG_REGULATORSETTING0_VRFCPVSEL		13
#define MC13783_REG_REGULATORSETTING0_VSIMVSEL		14
#define MC13783_REG_REGULATORSETTING0_VESIMVSEL		15
#define MC13783_REG_REGULATORSETTING0_VCAMVSEL		16

#define MC13783_REG_REGULATORSETTING0_VIOLOVSEL_M	(3 << 2)
#define MC13783_REG_REGULATORSETTING0_VDIGVSEL_M	(3 << 4)
#define MC13783_REG_REGULATORSETTING0_VGENVSEL_M	(7 << 6)
#define MC13783_REG_REGULATORSETTING0_VRFDIGVSEL_M	(3 << 9)
#define MC13783_REG_REGULATORSETTING0_VRFREFVSEL_M	(3 << 11)
#define MC13783_REG_REGULATORSETTING0_VRFCPVSEL_M	(1 << 13)
#define MC13783_REG_REGULATORSETTING0_VSIMVSEL_M	(1 << 14)
#define MC13783_REG_REGULATORSETTING0_VESIMVSEL_M	(1 << 15)
#define MC13783_REG_REGULATORSETTING0_VCAMVSEL_M	(7 << 16)

#define MC13783_REG_REGULATORSETTING1		31
#define MC13783_REG_REGULATORSETTING1_VVIBVSEL		0
#define MC13783_REG_REGULATORSETTING1_VRF1VSEL		2
#define MC13783_REG_REGULATORSETTING1_VRF2VSEL		4
#define MC13783_REG_REGULATORSETTING1_VMMC1VSEL		6
#define MC13783_REG_REGULATORSETTING1_VMMC2VSEL		9

#define MC13783_REG_REGULATORSETTING1_VVIBVSEL_M	(3 << 0)
#define MC13783_REG_REGULATORSETTING1_VRF1VSEL_M	(3 << 2)
#define MC13783_REG_REGULATORSETTING1_VRF2VSEL_M	(3 << 4)
#define MC13783_REG_REGULATORSETTING1_VMMC1VSEL_M	(7 << 6)
#define MC13783_REG_REGULATORSETTING1_VMMC2VSEL_M	(7 << 9)

#define MC13783_REG_REGULATORMODE0		32
#define MC13783_REG_REGULATORMODE0_VAUDIOEN		(1 << 0)
#define MC13783_REG_REGULATORMODE0_VIOHIEN		(1 << 3)
#define MC13783_REG_REGULATORMODE0_VIOLOEN		(1 << 6)
#define MC13783_REG_REGULATORMODE0_VDIGEN		(1 << 9)
#define MC13783_REG_REGULATORMODE0_VGENEN		(1 << 12)
#define MC13783_REG_REGULATORMODE0_VRFDIGEN		(1 << 15)
#define MC13783_REG_REGULATORMODE0_VRFREFEN		(1 << 18)
#define MC13783_REG_REGULATORMODE0_VRFCPEN		(1 << 21)

#define MC13783_REG_REGULATORMODE1		33
#define MC13783_REG_REGULATORMODE1_VSIMEN		(1 << 0)
#define MC13783_REG_REGULATORMODE1_VESIMEN		(1 << 3)
#define MC13783_REG_REGULATORMODE1_VCAMEN		(1 << 6)
#define MC13783_REG_REGULATORMODE1_VRFBGEN		(1 << 9)
#define MC13783_REG_REGULATORMODE1_VVIBEN		(1 << 11)
#define MC13783_REG_REGULATORMODE1_VRF1EN		(1 << 12)
#define MC13783_REG_REGULATORMODE1_VRF2EN		(1 << 15)
#define MC13783_REG_REGULATORMODE1_VMMC1EN		(1 << 18)
#define MC13783_REG_REGULATORMODE1_VMMC2EN		(1 << 21)

#define MC13783_REG_POWERMISC			34
#define MC13783_REG_POWERMISC_GPO1EN			(1 << 6)
#define MC13783_REG_POWERMISC_GPO2EN			(1 << 8)
#define MC13783_REG_POWERMISC_GPO3EN			(1 << 10)
#define MC13783_REG_POWERMISC_GPO4EN			(1 << 12)
#define MC13783_REG_POWERMISC_PWGT1SPIEN		(1 << 15)
#define MC13783_REG_POWERMISC_PWGT2SPIEN		(1 << 16)

#define MC13783_REG_POWERMISC_PWGTSPI_M			(3 << 15)


struct mc13783_regulator {
	struct regulator_desc desc;
	int reg;
	int enable_bit;
	int vsel_reg;
	int vsel_shift;
	int vsel_mask;
	int const *voltages;
};

/* Voltage Values */
static const int const mc13783_sw3_val[] = {
	5000000, 5000000, 5000000, 5500000,
};

static const int const mc13783_vaudio_val[] = {
	2775000,
};

static const int const mc13783_viohi_val[] = {
	2775000,
};

static const int const mc13783_violo_val[] = {
	1200000, 1300000, 1500000, 1800000,
};

static const int const mc13783_vdig_val[] = {
	1200000, 1300000, 1500000, 1800000,
};

static const int const mc13783_vgen_val[] = {
	1200000, 1300000, 1500000, 1800000,
	1100000, 2000000, 2775000, 2400000,
};

static const int const mc13783_vrfdig_val[] = {
	1200000, 1500000, 1800000, 1875000,
};

static const int const mc13783_vrfref_val[] = {
	2475000, 2600000, 2700000, 2775000,
};

static const int const mc13783_vrfcp_val[] = {
	2700000, 2775000,
};

static const int const mc13783_vsim_val[] = {
	1800000, 2900000, 3000000,
};

static const int const mc13783_vesim_val[] = {
	1800000, 2900000,
};

static const int const mc13783_vcam_val[] = {
	1500000, 1800000, 2500000, 2550000,
	2600000, 2750000, 2800000, 3000000,
};

static const int const mc13783_vrfbg_val[] = {
	1250000,
};

static const int const mc13783_vvib_val[] = {
	1300000, 1800000, 2000000, 3000000,
};

static const int const mc13783_vmmc_val[] = {
	1600000, 1800000, 2000000, 2600000,
	2700000, 2800000, 2900000, 3000000,
};

static const int const mc13783_vrf_val[] = {
	1500000, 1875000, 2700000, 2775000,
};

static const int const mc13783_gpo_val[] = {
	3100000,
};

static const int const mc13783_pwgtdrv_val[] = {
	5500000,
};

static struct regulator_ops mc13783_regulator_ops;
static struct regulator_ops mc13783_fixed_regulator_ops;
static struct regulator_ops mc13783_gpo_regulator_ops;

#define MC13783_DEFINE(prefix, _name, _reg, _vsel_reg, _voltages)	\
	[MC13783_ ## prefix ## _ ## _name] = {				\
		.desc = {						\
			.name = #prefix "_" #_name,			\
			.n_voltages = ARRAY_SIZE(_voltages),		\
			.ops = &mc13783_regulator_ops,			\
			.type = REGULATOR_VOLTAGE,			\
			.id = MC13783_ ## prefix ## _ ## _name,		\
			.owner = THIS_MODULE,				\
		},							\
		.reg = MC13783_REG_ ## _reg,				\
		.enable_bit = MC13783_REG_ ## _reg ## _ ## _name ## EN,	\
		.vsel_reg = MC13783_REG_ ## _vsel_reg,			\
		.vsel_shift = MC13783_REG_ ## _vsel_reg ## _ ## _name ## VSEL,\
		.vsel_mask = MC13783_REG_ ## _vsel_reg ## _ ## _name ## VSEL_M,\
		.voltages =  _voltages,					\
	}

#define MC13783_FIXED_DEFINE(prefix, _name, _reg, _voltages)		\
	[MC13783_ ## prefix ## _ ## _name] = {				\
		.desc = {						\
			.name = #prefix "_" #_name,			\
			.n_voltages = ARRAY_SIZE(_voltages),		\
			.ops = &mc13783_fixed_regulator_ops,		\
			.type = REGULATOR_VOLTAGE,			\
			.id = MC13783_ ## prefix ## _ ## _name,		\
			.owner = THIS_MODULE,				\
		},							\
		.reg = MC13783_REG_ ## _reg,				\
		.enable_bit = MC13783_REG_ ## _reg ## _ ## _name ## EN,	\
		.voltages =  _voltages,					\
	}

#define MC13783_GPO_DEFINE(prefix, _name, _reg,  _voltages)		\
	[MC13783_ ## prefix ## _ ## _name] = {				\
		.desc = {						\
			.name = #prefix "_" #_name,			\
			.n_voltages = ARRAY_SIZE(_voltages),		\
			.ops = &mc13783_gpo_regulator_ops,		\
			.type = REGULATOR_VOLTAGE,			\
			.id = MC13783_ ## prefix ## _ ## _name,		\
			.owner = THIS_MODULE,				\
		},							\
		.reg = MC13783_REG_ ## _reg,				\
		.enable_bit = MC13783_REG_ ## _reg ## _ ## _name ## EN,	\
		.voltages =  _voltages,					\
	}

#define MC13783_DEFINE_SW(_name, _reg, _vsel_reg, _voltages)		\
	MC13783_DEFINE(SW, _name, _reg, _vsel_reg, _voltages)
#define MC13783_DEFINE_REGU(_name, _reg, _vsel_reg, _voltages)		\
	MC13783_DEFINE(REGU, _name, _reg, _vsel_reg, _voltages)

static struct mc13783_regulator mc13783_regulators[] = {
	MC13783_DEFINE_SW(SW3, SWITCHERS5, SWITCHERS5, mc13783_sw3_val),

	MC13783_FIXED_DEFINE(REGU, VAUDIO, REGULATORMODE0, mc13783_vaudio_val),
	MC13783_FIXED_DEFINE(REGU, VIOHI, REGULATORMODE0, mc13783_viohi_val),
	MC13783_DEFINE_REGU(VIOLO, REGULATORMODE0, REGULATORSETTING0,	\
			    mc13783_violo_val),
	MC13783_DEFINE_REGU(VDIG, REGULATORMODE0, REGULATORSETTING0,	\
			    mc13783_vdig_val),
	MC13783_DEFINE_REGU(VGEN, REGULATORMODE0, REGULATORSETTING0,	\
			    mc13783_vgen_val),
	MC13783_DEFINE_REGU(VRFDIG, REGULATORMODE0, REGULATORSETTING0,	\
			    mc13783_vrfdig_val),
	MC13783_DEFINE_REGU(VRFREF, REGULATORMODE0, REGULATORSETTING0,	\
			    mc13783_vrfref_val),
	MC13783_DEFINE_REGU(VRFCP, REGULATORMODE0, REGULATORSETTING0,	\
			    mc13783_vrfcp_val),
	MC13783_DEFINE_REGU(VSIM, REGULATORMODE1, REGULATORSETTING0,	\
			    mc13783_vsim_val),
	MC13783_DEFINE_REGU(VESIM, REGULATORMODE1, REGULATORSETTING0,	\
			    mc13783_vesim_val),
	MC13783_DEFINE_REGU(VCAM, REGULATORMODE1, REGULATORSETTING0,	\
			    mc13783_vcam_val),
	MC13783_FIXED_DEFINE(REGU, VRFBG, REGULATORMODE1, mc13783_vrfbg_val),
	MC13783_DEFINE_REGU(VVIB, REGULATORMODE1, REGULATORSETTING1,	\
			    mc13783_vvib_val),
	MC13783_DEFINE_REGU(VRF1, REGULATORMODE1, REGULATORSETTING1,	\
			    mc13783_vrf_val),
	MC13783_DEFINE_REGU(VRF2, REGULATORMODE1, REGULATORSETTING1,	\
			    mc13783_vrf_val),
	MC13783_DEFINE_REGU(VMMC1, REGULATORMODE1, REGULATORSETTING1,	\
			    mc13783_vmmc_val),
	MC13783_DEFINE_REGU(VMMC2, REGULATORMODE1, REGULATORSETTING1,	\
			    mc13783_vmmc_val),
	MC13783_GPO_DEFINE(REGU, GPO1, POWERMISC, mc13783_gpo_val),
	MC13783_GPO_DEFINE(REGU, GPO2, POWERMISC, mc13783_gpo_val),
	MC13783_GPO_DEFINE(REGU, GPO3, POWERMISC, mc13783_gpo_val),
	MC13783_GPO_DEFINE(REGU, GPO4, POWERMISC, mc13783_gpo_val),
	MC13783_GPO_DEFINE(REGU, PWGT1SPI, POWERMISC, mc13783_pwgtdrv_val),
	MC13783_GPO_DEFINE(REGU, PWGT2SPI, POWERMISC, mc13783_pwgtdrv_val),
};

struct mc13783_regulator_priv {
	struct mc13783 *mc13783;
	u32 powermisc_pwgt_state;
	struct regulator_dev *regulators[];
};

static int mc13783_regulator_enable(struct regulator_dev *rdev)
{
	struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
	int id = rdev_get_id(rdev);
	int ret;

	dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);

	mc13783_lock(priv->mc13783);
	ret = mc13783_reg_rmw(priv->mc13783, mc13783_regulators[id].reg,
			mc13783_regulators[id].enable_bit,
			mc13783_regulators[id].enable_bit);
	mc13783_unlock(priv->mc13783);

	return ret;
}

static int mc13783_regulator_disable(struct regulator_dev *rdev)
{
	struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
	int id = rdev_get_id(rdev);
	int ret;

	dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);

	mc13783_lock(priv->mc13783);
	ret = mc13783_reg_rmw(priv->mc13783, mc13783_regulators[id].reg,
			mc13783_regulators[id].enable_bit, 0);
	mc13783_unlock(priv->mc13783);

	return ret;
}

static int mc13783_regulator_is_enabled(struct regulator_dev *rdev)
{
	struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
	int ret, id = rdev_get_id(rdev);
	unsigned int val;

	mc13783_lock(priv->mc13783);
	ret = mc13783_reg_read(priv->mc13783, mc13783_regulators[id].reg, &val);
	mc13783_unlock(priv->mc13783);

	if (ret)
		return ret;

	return (val & mc13783_regulators[id].enable_bit) != 0;
}

static int mc13783_regulator_list_voltage(struct regulator_dev *rdev,
						unsigned selector)
{
	int id = rdev_get_id(rdev);

	if (selector >= mc13783_regulators[id].desc.n_voltages)
		return -EINVAL;

	return mc13783_regulators[id].voltages[selector];
}

static int mc13783_get_best_voltage_index(struct regulator_dev *rdev,
						int min_uV, int max_uV)
{
	int reg_id = rdev_get_id(rdev);
	int i;
	int bestmatch;
	int bestindex;

	/*
	 * Locate the minimum voltage fitting the criteria on
	 * this regulator. The switchable voltages are not
	 * in strict falling order so we need to check them
	 * all for the best match.
	 */
	bestmatch = INT_MAX;
	bestindex = -1;
	for (i = 0; i < mc13783_regulators[reg_id].desc.n_voltages; i++) {
		if (mc13783_regulators[reg_id].voltages[i] >= min_uV &&
		    mc13783_regulators[reg_id].voltages[i] < bestmatch) {
			bestmatch = mc13783_regulators[reg_id].voltages[i];
			bestindex = i;
		}
	}

	if (bestindex < 0 || bestmatch > max_uV) {
		dev_warn(&rdev->dev, "no possible value for %d<=x<=%d uV\n",
				min_uV, max_uV);
		return -EINVAL;
	}
	return bestindex;
}

static int mc13783_regulator_set_voltage(struct regulator_dev *rdev,
						int min_uV, int max_uV)
{
	struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
	int value, id = rdev_get_id(rdev);
	int ret;

	dev_dbg(rdev_get_dev(rdev), "%s id: %d min_uV: %d max_uV: %d\n",
		__func__, id, min_uV, max_uV);

	/* Find the best index */
	value = mc13783_get_best_voltage_index(rdev, min_uV, max_uV);
	dev_dbg(rdev_get_dev(rdev), "%s best value: %d \n", __func__, value);
	if (value < 0)
		return value;

	mc13783_lock(priv->mc13783);
	ret = mc13783_reg_rmw(priv->mc13783, mc13783_regulators[id].vsel_reg,
			mc13783_regulators[id].vsel_mask,
			value << mc13783_regulators[id].vsel_shift);
	mc13783_unlock(priv->mc13783);

	return ret;
}

static int mc13783_regulator_get_voltage(struct regulator_dev *rdev)
{
	struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
	int ret, id = rdev_get_id(rdev);
	unsigned int val;

	dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);

	mc13783_lock(priv->mc13783);
	ret = mc13783_reg_read(priv->mc13783,
				mc13783_regulators[id].vsel_reg, &val);
	mc13783_unlock(priv->mc13783);

	if (ret)
		return ret;

	val = (val & mc13783_regulators[id].vsel_mask)
		>> mc13783_regulators[id].vsel_shift;

	dev_dbg(rdev_get_dev(rdev), "%s id: %d val: %d\n", __func__, id, val);

	BUG_ON(val < 0 || val > mc13783_regulators[id].desc.n_voltages);

	return mc13783_regulators[id].voltages[val];
}

static struct regulator_ops mc13783_regulator_ops = {
	.enable = mc13783_regulator_enable,
	.disable = mc13783_regulator_disable,
	.is_enabled = mc13783_regulator_is_enabled,
	.list_voltage = mc13783_regulator_list_voltage,
	.set_voltage = mc13783_regulator_set_voltage,
	.get_voltage = mc13783_regulator_get_voltage,
};

static int mc13783_fixed_regulator_set_voltage(struct regulator_dev *rdev,
						int min_uV, int max_uV)
{
	int id = rdev_get_id(rdev);

	dev_dbg(rdev_get_dev(rdev), "%s id: %d min_uV: %d max_uV: %d\n",
		__func__, id, min_uV, max_uV);

	if (min_uV >= mc13783_regulators[id].voltages[0] &&
	    max_uV <= mc13783_regulators[id].voltages[0])
		return 0;
	else
		return -EINVAL;
}

static int mc13783_fixed_regulator_get_voltage(struct regulator_dev *rdev)
{
	int id = rdev_get_id(rdev);

	dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);

	return mc13783_regulators[id].voltages[0];
}

static struct regulator_ops mc13783_fixed_regulator_ops = {
	.enable = mc13783_regulator_enable,
	.disable = mc13783_regulator_disable,
	.is_enabled = mc13783_regulator_is_enabled,
	.list_voltage = mc13783_regulator_list_voltage,
	.set_voltage = mc13783_fixed_regulator_set_voltage,
	.get_voltage = mc13783_fixed_regulator_get_voltage,
};

int mc13783_powermisc_rmw(struct mc13783_regulator_priv *priv, u32 mask,
									u32 val)
{
	struct mc13783 *mc13783 = priv->mc13783;
	int ret;
	u32 valread;

	BUG_ON(val & ~mask);

	ret = mc13783_reg_read(mc13783, MC13783_REG_POWERMISC, &valread);
	if (ret)
		return ret;

	/* Update the stored state for Power Gates. */
	priv->powermisc_pwgt_state =
				(priv->powermisc_pwgt_state & ~mask) | val;
	priv->powermisc_pwgt_state &= MC13783_REG_POWERMISC_PWGTSPI_M;

	/* Construct the new register value */
	valread = (valread & ~mask) | val;
	/* Overwrite the PWGTxEN with the stored version */
	valread = (valread & ~MC13783_REG_POWERMISC_PWGTSPI_M) |
						priv->powermisc_pwgt_state;

	return mc13783_reg_write(mc13783, MC13783_REG_POWERMISC, valread);
}

static int mc13783_gpo_regulator_enable(struct regulator_dev *rdev)
{
	struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
	int id = rdev_get_id(rdev);
	int ret;
	u32 en_val = mc13783_regulators[id].enable_bit;

	dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);

	/* Power Gate enable value is 0 */
	if (id == MC13783_REGU_PWGT1SPI ||
	    id == MC13783_REGU_PWGT2SPI)
		en_val = 0;

	mc13783_lock(priv->mc13783);
	ret = mc13783_powermisc_rmw(priv, mc13783_regulators[id].enable_bit,
					en_val);
	mc13783_unlock(priv->mc13783);

	return ret;
}

static int mc13783_gpo_regulator_disable(struct regulator_dev *rdev)
{
	struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
	int id = rdev_get_id(rdev);
	int ret;
	u32 dis_val = 0;

	dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);

	/* Power Gate disable value is 1 */
	if (id == MC13783_REGU_PWGT1SPI ||
	    id == MC13783_REGU_PWGT2SPI)
		dis_val = mc13783_regulators[id].enable_bit;

	mc13783_lock(priv->mc13783);
	ret = mc13783_powermisc_rmw(priv, mc13783_regulators[id].enable_bit,
					dis_val);
	mc13783_unlock(priv->mc13783);

	return ret;
}

static int mc13783_gpo_regulator_is_enabled(struct regulator_dev *rdev)
{
	struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
	int ret, id = rdev_get_id(rdev);
	unsigned int val;

	mc13783_lock(priv->mc13783);
	ret = mc13783_reg_read(priv->mc13783, mc13783_regulators[id].reg, &val);
	mc13783_unlock(priv->mc13783);

	if (ret)
		return ret;

	/* Power Gates state is stored in powermisc_pwgt_state
	 * where the meaning of bits is negated */
	val = (val & ~MC13783_REG_POWERMISC_PWGTSPI_M) |
	      (priv->powermisc_pwgt_state ^ MC13783_REG_POWERMISC_PWGTSPI_M);

	return (val & mc13783_regulators[id].enable_bit) != 0;
}

static struct regulator_ops mc13783_gpo_regulator_ops = {
	.enable = mc13783_gpo_regulator_enable,
	.disable = mc13783_gpo_regulator_disable,
	.is_enabled = mc13783_gpo_regulator_is_enabled,
	.list_voltage = mc13783_regulator_list_voltage,
	.set_voltage = mc13783_fixed_regulator_set_voltage,
	.get_voltage = mc13783_fixed_regulator_get_voltage,
};

static int __devinit mc13783_regulator_probe(struct platform_device *pdev)
{
	struct mc13783_regulator_priv *priv;
	struct mc13783 *mc13783 = dev_get_drvdata(pdev->dev.parent);
	struct mc13783_regulator_platform_data *pdata =
		dev_get_platdata(&pdev->dev);
	struct mc13783_regulator_init_data *init_data;
	int i, ret;

	dev_dbg(&pdev->dev, "mc13783_regulator_probe id %d\n", pdev->id);

	priv = kzalloc(sizeof(*priv) +
			pdata->num_regulators * sizeof(priv->regulators[0]),
			GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	priv->mc13783 = mc13783;

	for (i = 0; i < pdata->num_regulators; i++) {
		init_data = &pdata->regulators[i];
		priv->regulators[i] = regulator_register(
				&mc13783_regulators[init_data->id].desc,
				&pdev->dev, init_data->init_data, priv);

		if (IS_ERR(priv->regulators[i])) {
			dev_err(&pdev->dev, "failed to register regulator %s\n",
				mc13783_regulators[i].desc.name);
			ret = PTR_ERR(priv->regulators[i]);
			goto err;
		}
	}

	platform_set_drvdata(pdev, priv);

	return 0;
err:
	while (--i >= 0)
		regulator_unregister(priv->regulators[i]);

	kfree(priv);

	return ret;
}

static int __devexit mc13783_regulator_remove(struct platform_device *pdev)
{
	struct mc13783_regulator_priv *priv = platform_get_drvdata(pdev);
	struct mc13783_regulator_platform_data *pdata =
		dev_get_platdata(&pdev->dev);
	int i;

	platform_set_drvdata(pdev, NULL);

	for (i = 0; i < pdata->num_regulators; i++)
		regulator_unregister(priv->regulators[i]);

	kfree(priv);
	return 0;
}

static struct platform_driver mc13783_regulator_driver = {
	.driver	= {
		.name	= "mc13783-regulator",
		.owner	= THIS_MODULE,
	},
	.remove		= __devexit_p(mc13783_regulator_remove),
	.probe		= mc13783_regulator_probe,
};

static int __init mc13783_regulator_init(void)
{
	return platform_driver_register(&mc13783_regulator_driver);
}
subsys_initcall(mc13783_regulator_init);

static void __exit mc13783_regulator_exit(void)
{
	platform_driver_unregister(&mc13783_regulator_driver);
}
module_exit(mc13783_regulator_exit);

MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
MODULE_DESCRIPTION("Regulator Driver for Freescale MC13783 PMIC");
MODULE_ALIAS("platform:mc13783-regulator");