summaryrefslogtreecommitdiffstats
path: root/drivers/regulator/da9052-regulator.c
blob: 3767364452fdd890785da5276f1f9b648be89aea (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
/*
* da9052-regulator.c: Regulator driver for DA9052
*
* Copyright(c) 2011 Dialog Semiconductor Ltd.
*
* Author: David Dajun Chen <dchen@diasemi.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.
*
*/

#include <linux/module.h>
#include <linux/moduleparam.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/mfd/da9052/da9052.h>
#include <linux/mfd/da9052/reg.h>
#include <linux/mfd/da9052/pdata.h>

/* Buck step size */
#define DA9052_BUCK_PERI_3uV_STEP		100000
#define DA9052_BUCK_PERI_REG_MAP_UPTO_3uV	24
#define DA9052_CONST_3uV			3000000

#define DA9052_MIN_UA		0
#define DA9052_MAX_UA		3
#define DA9052_CURRENT_RANGE	4

/* Bit masks */
#define DA9052_BUCK_ILIM_MASK_EVEN	0x0c
#define DA9052_BUCK_ILIM_MASK_ODD	0xc0

static const u32 da9052_current_limits[3][4] = {
	{700000, 800000, 1000000, 1200000},	/* DA9052-BC BUCKs */
	{1600000, 2000000, 2400000, 3000000},	/* DA9053-AA/Bx BUCK-CORE */
	{800000, 1000000, 1200000, 1500000},	/* DA9053-AA/Bx BUCK-PRO,
						 * BUCK-MEM and BUCK-PERI
						*/
};

struct da9052_regulator_info {
	struct regulator_desc reg_desc;
	int step_uV;
	int min_uV;
	int max_uV;
	unsigned char volt_shift;
	unsigned char en_bit;
	unsigned char activate_bit;
};

struct da9052_regulator {
	struct da9052 *da9052;
	struct da9052_regulator_info *info;
	struct regulator_dev *rdev;
};

static int verify_range(struct da9052_regulator_info *info,
			 int min_uV, int max_uV)
{
	if (min_uV > info->max_uV || max_uV < info->min_uV)
		return -EINVAL;

	return 0;
}

static int da9052_regulator_enable(struct regulator_dev *rdev)
{
	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	struct da9052_regulator_info *info = regulator->info;
	int offset = rdev_get_id(rdev);

	return da9052_reg_update(regulator->da9052,
				 DA9052_BUCKCORE_REG + offset,
				 1 << info->en_bit, 1 << info->en_bit);
}

static int da9052_regulator_disable(struct regulator_dev *rdev)
{
	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	struct da9052_regulator_info *info = regulator->info;
	int offset = rdev_get_id(rdev);

	return da9052_reg_update(regulator->da9052,
				 DA9052_BUCKCORE_REG + offset,
				 1 << info->en_bit, 0);
}

static int da9052_regulator_is_enabled(struct regulator_dev *rdev)
{
	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	struct da9052_regulator_info *info = regulator->info;
	int offset = rdev_get_id(rdev);
	int ret;

	ret = da9052_reg_read(regulator->da9052, DA9052_BUCKCORE_REG + offset);
	if (ret < 0)
		return ret;

	return ret & (1 << info->en_bit);
}

static int da9052_dcdc_get_current_limit(struct regulator_dev *rdev)
{
	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	int offset = rdev_get_id(rdev);
	int ret, row = 2;

	ret = da9052_reg_read(regulator->da9052, DA9052_BUCKA_REG + offset/2);
	if (ret < 0)
		return ret;

	/* Determine the even or odd position of the buck current limit
	 * register field
	*/
	if (offset % 2 == 0)
		ret = (ret & DA9052_BUCK_ILIM_MASK_EVEN) >> 2;
	else
		ret = (ret & DA9052_BUCK_ILIM_MASK_ODD) >> 6;

	/* Select the appropriate current limit range */
	if (regulator->da9052->chip_id == DA9052)
		row = 0;
	else if (offset == 0)
		row = 1;

	return da9052_current_limits[row][ret];
}

static int da9052_dcdc_set_current_limit(struct regulator_dev *rdev, int min_uA,
					  int max_uA)
{
	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	int offset = rdev_get_id(rdev);
	int reg_val = 0;
	int i, row = 2;

	/* Select the appropriate current limit range */
	if (regulator->da9052->chip_id == DA9052)
		row = 0;
	else if (offset == 0)
		row = 1;

	if (min_uA > da9052_current_limits[row][DA9052_MAX_UA] ||
	    max_uA < da9052_current_limits[row][DA9052_MIN_UA])
		return -EINVAL;

	for (i = 0; i < DA9052_CURRENT_RANGE; i++) {
		if (min_uA <= da9052_current_limits[row][i]) {
			reg_val = i;
			break;
		}
	}

	/* Determine the even or odd position of the buck current limit
	 * register field
	*/
	if (offset % 2 == 0)
		return da9052_reg_update(regulator->da9052,
					 DA9052_BUCKA_REG + offset/2,
					 DA9052_BUCK_ILIM_MASK_EVEN,
					 reg_val << 2);
	else
		return da9052_reg_update(regulator->da9052,
					 DA9052_BUCKA_REG + offset/2,
					 DA9052_BUCK_ILIM_MASK_ODD,
					 reg_val << 6);
}

static int da9052_list_buckperi_voltage(struct regulator_dev *rdev,
					 unsigned int selector)
{
	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	struct da9052_regulator_info *info = regulator->info;
	int volt_uV;

	if ((regulator->da9052->chip_id == DA9052) &&
	    (selector >= DA9052_BUCK_PERI_REG_MAP_UPTO_3uV)) {
		volt_uV = ((DA9052_BUCK_PERI_REG_MAP_UPTO_3uV * info->step_uV)
			    + info->min_uV);
		volt_uV += (selector - DA9052_BUCK_PERI_REG_MAP_UPTO_3uV)
			    * (DA9052_BUCK_PERI_3uV_STEP);
	} else
			volt_uV = (selector * info->step_uV) + info->min_uV;

	if (volt_uV > info->max_uV)
		return -EINVAL;

	return volt_uV;
}

static int da9052_list_voltage(struct regulator_dev *rdev,
				unsigned int selector)
{
	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	struct da9052_regulator_info *info = regulator->info;
	int volt_uV;

	volt_uV = info->min_uV + info->step_uV * selector;

	if (volt_uV > info->max_uV)
		return -EINVAL;

	return volt_uV;
}

static int da9052_regulator_set_voltage_int(struct regulator_dev *rdev,
					     int min_uV, int max_uV,
					     unsigned int *selector)
{
	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	struct da9052_regulator_info *info = regulator->info;
	int offset = rdev_get_id(rdev);
	int ret;

	ret = verify_range(info, min_uV, max_uV);
	if (ret < 0)
		return ret;

	if (min_uV < info->min_uV)
		min_uV = info->min_uV;

	*selector = (min_uV - info->min_uV) / info->step_uV;

	ret = da9052_list_voltage(rdev, *selector);
	if (ret < 0)
		return ret;

	return da9052_reg_update(regulator->da9052,
				 DA9052_BUCKCORE_REG + offset,
				 (1 << info->volt_shift) - 1, *selector);
}

static int da9052_set_ldo_voltage(struct regulator_dev *rdev,
				   int min_uV, int max_uV,
				   unsigned int *selector)
{
	return da9052_regulator_set_voltage_int(rdev, min_uV, max_uV, selector);
}

static int da9052_set_ldo5_6_voltage(struct regulator_dev *rdev,
				      int min_uV, int max_uV,
				      unsigned int *selector)
{
	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	struct da9052_regulator_info *info = regulator->info;
	int ret;

	ret = da9052_regulator_set_voltage_int(rdev, min_uV, max_uV, selector);
	if (ret < 0)
		return ret;

	/* Some LDOs are DVC controlled which requires enabling of
	 * the LDO activate bit to implment the changes on the
	 * LDO output.
	*/
	return da9052_reg_update(regulator->da9052, DA9052_SUPPLY_REG, 0,
				 info->activate_bit);
}

static int da9052_set_dcdc_voltage(struct regulator_dev *rdev,
				    int min_uV, int max_uV,
				    unsigned int *selector)
{
	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	struct da9052_regulator_info *info = regulator->info;
	int ret;

	ret = da9052_regulator_set_voltage_int(rdev, min_uV, max_uV, selector);
	if (ret < 0)
		return ret;

	/* Some DCDCs are DVC controlled which requires enabling of
	 * the DCDC activate bit to implment the changes on the
	 * DCDC output.
	*/
	return da9052_reg_update(regulator->da9052, DA9052_SUPPLY_REG, 0,
				 info->activate_bit);
}

static int da9052_get_regulator_voltage_sel(struct regulator_dev *rdev)
{
	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	struct da9052_regulator_info *info = regulator->info;
	int offset = rdev_get_id(rdev);
	int ret;

	ret = da9052_reg_read(regulator->da9052, DA9052_BUCKCORE_REG + offset);
	if (ret < 0)
		return ret;

	ret &= ((1 << info->volt_shift) - 1);

	return ret;
}

static int da9052_set_buckperi_voltage(struct regulator_dev *rdev, int min_uV,
					int max_uV, unsigned int *selector)
{
	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	struct da9052_regulator_info *info = regulator->info;
	int offset = rdev_get_id(rdev);
	int ret;

	ret = verify_range(info, min_uV, max_uV);
	if (ret < 0)
		return ret;

	if (min_uV < info->min_uV)
		min_uV = info->min_uV;

	if ((regulator->da9052->chip_id == DA9052) &&
	    (min_uV >= DA9052_CONST_3uV))
		*selector = DA9052_BUCK_PERI_REG_MAP_UPTO_3uV +
			    ((min_uV - DA9052_CONST_3uV) /
			    (DA9052_BUCK_PERI_3uV_STEP));
	else
		*selector = (min_uV - info->min_uV) / info->step_uV;

	ret = da9052_list_buckperi_voltage(rdev, *selector);
	if (ret < 0)
		return ret;

	return da9052_reg_update(regulator->da9052,
				 DA9052_BUCKCORE_REG + offset,
				 (1 << info->volt_shift) - 1, *selector);
}

static int da9052_get_buckperi_voltage_sel(struct regulator_dev *rdev)
{
	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
	struct da9052_regulator_info *info = regulator->info;
	int offset = rdev_get_id(rdev);
	int ret;

	ret = da9052_reg_read(regulator->da9052, DA9052_BUCKCORE_REG + offset);
	if (ret < 0)
		return ret;

	ret &= ((1 << info->volt_shift) - 1);

	return ret;
}

static struct regulator_ops da9052_buckperi_ops = {
	.list_voltage = da9052_list_buckperi_voltage,
	.get_voltage_sel = da9052_get_buckperi_voltage_sel,
	.set_voltage = da9052_set_buckperi_voltage,

	.get_current_limit = da9052_dcdc_get_current_limit,
	.set_current_limit = da9052_dcdc_set_current_limit,

	.is_enabled = da9052_regulator_is_enabled,
	.enable = da9052_regulator_enable,
	.disable = da9052_regulator_disable,
};

static struct regulator_ops da9052_dcdc_ops = {
	.set_voltage = da9052_set_dcdc_voltage,
	.get_current_limit = da9052_dcdc_get_current_limit,
	.set_current_limit = da9052_dcdc_set_current_limit,

	.list_voltage = da9052_list_voltage,
	.get_voltage_sel = da9052_get_regulator_voltage_sel,
	.is_enabled = da9052_regulator_is_enabled,
	.enable = da9052_regulator_enable,
	.disable = da9052_regulator_disable,
};

static struct regulator_ops da9052_ldo5_6_ops = {
	.set_voltage = da9052_set_ldo5_6_voltage,

	.list_voltage = da9052_list_voltage,
	.get_voltage_sel = da9052_get_regulator_voltage_sel,
	.is_enabled = da9052_regulator_is_enabled,
	.enable = da9052_regulator_enable,
	.disable = da9052_regulator_disable,
};

static struct regulator_ops da9052_ldo_ops = {
	.set_voltage = da9052_set_ldo_voltage,

	.list_voltage = da9052_list_voltage,
	.get_voltage_sel = da9052_get_regulator_voltage_sel,
	.is_enabled = da9052_regulator_is_enabled,
	.enable = da9052_regulator_enable,
	.disable = da9052_regulator_disable,
};

#define DA9052_LDO5_6(_id, step, min, max, sbits, ebits, abits) \
{\
	.reg_desc = {\
		.name = "LDO" #_id,\
		.ops = &da9052_ldo5_6_ops,\
		.type = REGULATOR_VOLTAGE,\
		.id = _id,\
		.owner = THIS_MODULE,\
	},\
	.min_uV = (min) * 1000,\
	.max_uV = (max) * 1000,\
	.step_uV = (step) * 1000,\
	.volt_shift = (sbits),\
	.en_bit = (ebits),\
	.activate_bit = (abits),\
}

#define DA9052_LDO(_id, step, min, max, sbits, ebits, abits) \
{\
	.reg_desc = {\
		.name = "LDO" #_id,\
		.ops = &da9052_ldo_ops,\
		.type = REGULATOR_VOLTAGE,\
		.id = _id,\
		.owner = THIS_MODULE,\
	},\
	.min_uV = (min) * 1000,\
	.max_uV = (max) * 1000,\
	.step_uV = (step) * 1000,\
	.volt_shift = (sbits),\
	.en_bit = (ebits),\
	.activate_bit = (abits),\
}

#define DA9052_DCDC(_id, step, min, max, sbits, ebits, abits) \
{\
	.reg_desc = {\
		.name = "BUCK" #_id,\
		.ops = &da9052_dcdc_ops,\
		.type = REGULATOR_VOLTAGE,\
		.id = _id,\
		.owner = THIS_MODULE,\
	},\
	.min_uV = (min) * 1000,\
	.max_uV = (max) * 1000,\
	.step_uV = (step) * 1000,\
	.volt_shift = (sbits),\
	.en_bit = (ebits),\
	.activate_bit = (abits),\
}

#define DA9052_BUCKPERI(_id, step, min, max, sbits, ebits, abits) \
{\
	.reg_desc = {\
		.name = "BUCK" #_id,\
		.ops = &da9052_buckperi_ops,\
		.type = REGULATOR_VOLTAGE,\
		.id = _id,\
		.owner = THIS_MODULE,\
	},\
	.min_uV = (min) * 1000,\
	.max_uV = (max) * 1000,\
	.step_uV = (step) * 1000,\
	.volt_shift = (sbits),\
	.en_bit = (ebits),\
	.activate_bit = (abits),\
}

static struct da9052_regulator_info da9052_regulator_info[] = {
	/* Buck1 - 4 */
	DA9052_DCDC(0, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBCOREGO),
	DA9052_DCDC(1, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBPROGO),
	DA9052_DCDC(2, 25, 925, 2500, 6, 6, DA9052_SUPPLY_VBMEMGO),
	DA9052_BUCKPERI(3, 50, 1800, 3600, 5, 6, 0),
	/* LD01 - LDO10 */
	DA9052_LDO(4, 50, 600, 1800, 5, 6, 0),
	DA9052_LDO5_6(5, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO),
	DA9052_LDO5_6(6, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO),
	DA9052_LDO(7, 25, 1725, 3300, 6, 6, 0),
	DA9052_LDO(8, 50, 1200, 3600, 6, 6, 0),
	DA9052_LDO(9, 50, 1200, 3600, 6, 6, 0),
	DA9052_LDO(10, 50, 1200, 3600, 6, 6, 0),
	DA9052_LDO(11, 50, 1200, 3600, 6, 6, 0),
	DA9052_LDO(12, 50, 1250, 3650, 6, 6, 0),
	DA9052_LDO(13, 50, 1200, 3600, 6, 6, 0),
};

static struct da9052_regulator_info da9053_regulator_info[] = {
	/* Buck1 - 4 */
	DA9052_DCDC(0, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBCOREGO),
	DA9052_DCDC(1, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBPROGO),
	DA9052_DCDC(2, 25, 925, 2500, 6, 6, DA9052_SUPPLY_VBMEMGO),
	DA9052_BUCKPERI(3, 25, 925, 2500, 6, 6, 0),
	/* LD01 - LDO10 */
	DA9052_LDO(4, 50, 600, 1800, 5, 6, 0),
	DA9052_LDO5_6(5, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO),
	DA9052_LDO5_6(6, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO),
	DA9052_LDO(7, 25, 1725, 3300, 6, 6, 0),
	DA9052_LDO(8, 50, 1200, 3600, 6, 6, 0),
	DA9052_LDO(9, 50, 1200, 3600, 6, 6, 0),
	DA9052_LDO(10, 50, 1200, 3600, 6, 6, 0),
	DA9052_LDO(11, 50, 1200, 3600, 6, 6, 0),
	DA9052_LDO(12, 50, 1250, 3650, 6, 6, 0),
	DA9052_LDO(13, 50, 1200, 3600, 6, 6, 0),
};

static inline struct da9052_regulator_info *find_regulator_info(u8 chip_id,
								 int id)
{
	struct da9052_regulator_info *info;
	int i;

	switch (chip_id) {
	case DA9052:
		for (i = 0; i < ARRAY_SIZE(da9052_regulator_info); i++) {
			info = &da9052_regulator_info[i];
			if (info->reg_desc.id == id)
				return info;
		}
		break;
	case DA9053_AA:
	case DA9053_BA:
	case DA9053_BB:
		for (i = 0; i < ARRAY_SIZE(da9053_regulator_info); i++) {
			info = &da9053_regulator_info[i];
			if (info->reg_desc.id == id)
				return info;
		}
		break;
	}

	return NULL;
}

static int __devinit da9052_regulator_probe(struct platform_device *pdev)
{
	struct da9052_regulator *regulator;
	struct da9052 *da9052;
	struct da9052_pdata *pdata;
	int ret;

	regulator = devm_kzalloc(&pdev->dev, sizeof(struct da9052_regulator),
				 GFP_KERNEL);
	if (!regulator)
		return -ENOMEM;

	da9052 = dev_get_drvdata(pdev->dev.parent);
	pdata = da9052->dev->platform_data;
	regulator->da9052 = da9052;

	regulator->info = find_regulator_info(regulator->da9052->chip_id,
					      pdev->id);
	if (regulator->info == NULL) {
		dev_err(&pdev->dev, "invalid regulator ID specified\n");
		ret = -EINVAL;
		goto err;
	}
	regulator->rdev = regulator_register(&regulator->info->reg_desc,
					     &pdev->dev,
					     pdata->regulators[pdev->id],
					     regulator, NULL);
	if (IS_ERR(regulator->rdev)) {
		dev_err(&pdev->dev, "failed to register regulator %s\n",
			regulator->info->reg_desc.name);
		ret = PTR_ERR(regulator->rdev);
		goto err;
	}

	platform_set_drvdata(pdev, regulator);

	return 0;
err:
	devm_kfree(&pdev->dev, regulator);
	return ret;
}

static int __devexit da9052_regulator_remove(struct platform_device *pdev)
{
	struct da9052_regulator *regulator = platform_get_drvdata(pdev);

	regulator_unregister(regulator->rdev);
	devm_kfree(&pdev->dev, regulator);

	return 0;
}

static struct platform_driver da9052_regulator_driver = {
	.probe = da9052_regulator_probe,
	.remove = __devexit_p(da9052_regulator_remove),
	.driver = {
		.name = "da9052-regulator",
		.owner = THIS_MODULE,
	},
};

static int __init da9052_regulator_init(void)
{
	return platform_driver_register(&da9052_regulator_driver);
}
subsys_initcall(da9052_regulator_init);

static void __exit da9052_regulator_exit(void)
{
	platform_driver_unregister(&da9052_regulator_driver);
}
module_exit(da9052_regulator_exit);

MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
MODULE_DESCRIPTION("Power Regulator driver for Dialog DA9052 PMIC");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:da9052-regulator");
OpenPOWER on IntegriCloud