forked from torvalds/linux
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathmax77802-regulator.c
610 lines (549 loc) · 18.8 KB
/
max77802-regulator.c
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
/*
* max77802.c - Regulator driver for the Maxim 77802
*
* Copyright (C) 2013-2014 Google, Inc
* Simon Glass <[email protected]>
*
* Copyright (C) 2012 Samsung Electronics
* Chiwoong Byun <[email protected]>
* Jonghwa Lee <[email protected]>
*
* 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.
*
* This driver is based on max8997.c
*/
#include <linux/kernel.h>
#include <linux/bug.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/slab.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#include <linux/mfd/max77686.h>
#include <linux/mfd/max77686-private.h>
#include <dt-bindings/regulator/maxim,max77802.h>
/* Default ramp delay in case it is not manually set */
#define MAX77802_RAMP_DELAY 100000 /* uV/us */
#define MAX77802_OPMODE_SHIFT_LDO 6
#define MAX77802_OPMODE_BUCK234_SHIFT 4
#define MAX77802_OPMODE_MASK 0x3
#define MAX77802_VSEL_MASK 0x3F
#define MAX77802_DVS_VSEL_MASK 0xFF
#define MAX77802_RAMP_RATE_MASK_2BIT 0xC0
#define MAX77802_RAMP_RATE_SHIFT_2BIT 6
#define MAX77802_RAMP_RATE_MASK_4BIT 0xF0
#define MAX77802_RAMP_RATE_SHIFT_4BIT 4
#define MAX77802_STATUS_OFF 0x0
#define MAX77802_OFF_PWRREQ 0x1
#define MAX77802_LP_PWRREQ 0x2
/* MAX77802 has two register formats: 2-bit and 4-bit */
static const unsigned int ramp_table_77802_2bit[] = {
12500,
25000,
50000,
100000,
};
static unsigned int ramp_table_77802_4bit[] = {
1000, 2000, 3030, 4000,
5000, 5880, 7140, 8330,
9090, 10000, 11110, 12500,
16670, 25000, 50000, 100000,
};
struct max77802_regulator_prv {
/* Array indexed by regulator id */
unsigned int opmode[MAX77802_REG_MAX];
};
static inline unsigned int max77802_map_mode(unsigned int mode)
{
return mode == MAX77802_OPMODE_NORMAL ?
REGULATOR_MODE_NORMAL : REGULATOR_MODE_STANDBY;
}
static int max77802_get_opmode_shift(int id)
{
if (id == MAX77802_BUCK1 || (id >= MAX77802_BUCK5 &&
id <= MAX77802_BUCK10))
return 0;
if (id >= MAX77802_BUCK2 && id <= MAX77802_BUCK4)
return MAX77802_OPMODE_BUCK234_SHIFT;
if (id >= MAX77802_LDO1 && id <= MAX77802_LDO35)
return MAX77802_OPMODE_SHIFT_LDO;
return -EINVAL;
}
/**
* max77802_set_suspend_disable - Disable the regulator during system suspend
* @rdev: regulator to mark as disabled
*
* All regulators expect LDO 1, 3, 20 and 21 support OFF by PWRREQ.
* Configure the regulator so the PMIC will turn it OFF during system suspend.
*/
static int max77802_set_suspend_disable(struct regulator_dev *rdev)
{
unsigned int val = MAX77802_OFF_PWRREQ;
struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
int id = rdev_get_id(rdev);
int shift = max77802_get_opmode_shift(id);
max77802->opmode[id] = val;
return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
rdev->desc->enable_mask, val << shift);
}
/*
* Some LDOs support Low Power Mode while the system is running.
*
* LDOs 1, 3, 20, 21.
*/
static int max77802_set_mode(struct regulator_dev *rdev, unsigned int mode)
{
struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
int id = rdev_get_id(rdev);
unsigned int val;
int shift = max77802_get_opmode_shift(id);
switch (mode) {
case REGULATOR_MODE_STANDBY:
val = MAX77802_OPMODE_LP; /* ON in Low Power Mode */
break;
case REGULATOR_MODE_NORMAL:
val = MAX77802_OPMODE_NORMAL; /* ON in Normal Mode */
break;
default:
dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n",
rdev->desc->name, mode);
return -EINVAL;
}
max77802->opmode[id] = val;
return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
rdev->desc->enable_mask, val << shift);
}
static unsigned max77802_get_mode(struct regulator_dev *rdev)
{
struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
int id = rdev_get_id(rdev);
return max77802_map_mode(max77802->opmode[id]);
}
/**
* max77802_set_suspend_mode - set regulator opmode when the system is suspended
* @rdev: regulator to change mode
* @mode: operating mode to be set
*
* Will set the operating mode for the regulators during system suspend.
* This function is valid for the three different enable control logics:
*
* Enable Control Logic1 by PWRREQ (BUCK 2-4 and LDOs 2, 4-19, 22-35)
* Enable Control Logic2 by PWRREQ (LDOs 1, 20, 21)
* Enable Control Logic3 by PWRREQ (LDO 3)
*
* If setting the regulator mode fails, the function only warns but does
* not return an error code to avoid the regulator core to stop setting
* the operating mode for the remaining regulators.
*/
static int max77802_set_suspend_mode(struct regulator_dev *rdev,
unsigned int mode)
{
struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
int id = rdev_get_id(rdev);
unsigned int val;
int shift = max77802_get_opmode_shift(id);
/*
* If the regulator has been disabled for suspend
* then is invalid to try setting a suspend mode.
*/
if (max77802->opmode[id] == MAX77802_OFF_PWRREQ) {
dev_warn(&rdev->dev, "%s: is disabled, mode: 0x%x not set\n",
rdev->desc->name, mode);
return 0;
}
switch (mode) {
case REGULATOR_MODE_STANDBY:
/*
* If the regulator opmode is normal then enable
* ON in Low Power Mode by PWRREQ. If the mode is
* already Low Power then no action is required.
*/
if (max77802->opmode[id] == MAX77802_OPMODE_NORMAL)
val = MAX77802_LP_PWRREQ;
else
return 0;
break;
case REGULATOR_MODE_NORMAL:
/*
* If the regulator operating mode is Low Power then
* normal is not a valid opmode in suspend. If the
* mode is already normal then no action is required.
*/
if (max77802->opmode[id] == MAX77802_OPMODE_LP)
dev_warn(&rdev->dev, "%s: in Low Power: 0x%x invalid\n",
rdev->desc->name, mode);
return 0;
default:
dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n",
rdev->desc->name, mode);
return -EINVAL;
}
return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
rdev->desc->enable_mask, val << shift);
}
static int max77802_enable(struct regulator_dev *rdev)
{
struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
int id = rdev_get_id(rdev);
int shift = max77802_get_opmode_shift(id);
if (max77802->opmode[id] == MAX77802_OFF_PWRREQ)
max77802->opmode[id] = MAX77802_OPMODE_NORMAL;
return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
rdev->desc->enable_mask,
max77802->opmode[id] << shift);
}
static int max77802_find_ramp_value(struct regulator_dev *rdev,
const unsigned int limits[], int size,
unsigned int ramp_delay)
{
int i;
for (i = 0; i < size; i++) {
if (ramp_delay <= limits[i])
return i;
}
/* Use maximum value for no ramp control */
dev_warn(&rdev->dev, "%s: ramp_delay: %d not supported, setting 100000\n",
rdev->desc->name, ramp_delay);
return size - 1;
}
/* Used for BUCKs 2-4 */
static int max77802_set_ramp_delay_2bit(struct regulator_dev *rdev,
int ramp_delay)
{
int id = rdev_get_id(rdev);
unsigned int ramp_value;
if (id > MAX77802_BUCK4) {
dev_warn(&rdev->dev,
"%s: regulator: ramp delay not supported\n",
rdev->desc->name);
return -EINVAL;
}
ramp_value = max77802_find_ramp_value(rdev, ramp_table_77802_2bit,
ARRAY_SIZE(ramp_table_77802_2bit), ramp_delay);
return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
MAX77802_RAMP_RATE_MASK_2BIT,
ramp_value << MAX77802_RAMP_RATE_SHIFT_2BIT);
}
/* For BUCK1, 6 */
static int max77802_set_ramp_delay_4bit(struct regulator_dev *rdev,
int ramp_delay)
{
unsigned int ramp_value;
ramp_value = max77802_find_ramp_value(rdev, ramp_table_77802_4bit,
ARRAY_SIZE(ramp_table_77802_4bit), ramp_delay);
return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
MAX77802_RAMP_RATE_MASK_4BIT,
ramp_value << MAX77802_RAMP_RATE_SHIFT_4BIT);
}
/*
* LDOs 2, 4-19, 22-35
*/
static struct regulator_ops max77802_ldo_ops_logic1 = {
.list_voltage = regulator_list_voltage_linear,
.map_voltage = regulator_map_voltage_linear,
.is_enabled = regulator_is_enabled_regmap,
.enable = max77802_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 = max77802_set_suspend_disable,
.set_suspend_mode = max77802_set_suspend_mode,
};
/*
* LDOs 1, 20, 21, 3
*/
static struct regulator_ops max77802_ldo_ops_logic2 = {
.list_voltage = regulator_list_voltage_linear,
.map_voltage = regulator_map_voltage_linear,
.is_enabled = regulator_is_enabled_regmap,
.enable = max77802_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_mode = max77802_set_mode,
.get_mode = max77802_get_mode,
.set_suspend_mode = max77802_set_suspend_mode,
};
/* BUCKS 1, 6 */
static struct regulator_ops max77802_buck_16_dvs_ops = {
.list_voltage = regulator_list_voltage_linear,
.map_voltage = regulator_map_voltage_linear,
.is_enabled = regulator_is_enabled_regmap,
.enable = max77802_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_ramp_delay = max77802_set_ramp_delay_4bit,
.set_suspend_disable = max77802_set_suspend_disable,
};
/* BUCKs 2-4 */
static struct regulator_ops max77802_buck_234_ops = {
.list_voltage = regulator_list_voltage_linear,
.map_voltage = regulator_map_voltage_linear,
.is_enabled = regulator_is_enabled_regmap,
.enable = max77802_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_ramp_delay = max77802_set_ramp_delay_2bit,
.set_suspend_disable = max77802_set_suspend_disable,
.set_suspend_mode = max77802_set_suspend_mode,
};
/* BUCKs 5, 7-10 */
static struct regulator_ops max77802_buck_dvs_ops = {
.list_voltage = regulator_list_voltage_linear,
.map_voltage = regulator_map_voltage_linear,
.is_enabled = regulator_is_enabled_regmap,
.enable = max77802_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_ramp_delay = max77802_set_ramp_delay_2bit,
.set_suspend_disable = max77802_set_suspend_disable,
};
/* LDOs 3-7, 9-14, 18-26, 28, 29, 32-34 */
#define regulator_77802_desc_p_ldo(num, supply, log) { \
.name = "LDO"#num, \
.of_match = of_match_ptr("LDO"#num), \
.regulators_node = of_match_ptr("regulators"), \
.id = MAX77802_LDO##num, \
.supply_name = "inl"#supply, \
.ops = &max77802_ldo_ops_logic##log, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.min_uV = 800000, \
.uV_step = 50000, \
.ramp_delay = MAX77802_RAMP_DELAY, \
.n_voltages = 1 << 6, \
.vsel_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \
.vsel_mask = MAX77802_VSEL_MASK, \
.enable_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \
.enable_mask = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \
.of_map_mode = max77802_map_mode, \
}
/* LDOs 1, 2, 8, 15, 17, 27, 30, 35 */
#define regulator_77802_desc_n_ldo(num, supply, log) { \
.name = "LDO"#num, \
.of_match = of_match_ptr("LDO"#num), \
.regulators_node = of_match_ptr("regulators"), \
.id = MAX77802_LDO##num, \
.supply_name = "inl"#supply, \
.ops = &max77802_ldo_ops_logic##log, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.min_uV = 800000, \
.uV_step = 25000, \
.ramp_delay = MAX77802_RAMP_DELAY, \
.n_voltages = 1 << 6, \
.vsel_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \
.vsel_mask = MAX77802_VSEL_MASK, \
.enable_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \
.enable_mask = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \
.of_map_mode = max77802_map_mode, \
}
/* BUCKs 1, 6 */
#define regulator_77802_desc_16_buck(num) { \
.name = "BUCK"#num, \
.of_match = of_match_ptr("BUCK"#num), \
.regulators_node = of_match_ptr("regulators"), \
.id = MAX77802_BUCK##num, \
.supply_name = "inb"#num, \
.ops = &max77802_buck_16_dvs_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.min_uV = 612500, \
.uV_step = 6250, \
.ramp_delay = MAX77802_RAMP_DELAY, \
.n_voltages = 1 << 8, \
.vsel_reg = MAX77802_REG_BUCK ## num ## DVS1, \
.vsel_mask = MAX77802_DVS_VSEL_MASK, \
.enable_reg = MAX77802_REG_BUCK ## num ## CTRL, \
.enable_mask = MAX77802_OPMODE_MASK, \
.of_map_mode = max77802_map_mode, \
}
/* BUCKS 2-4 */
#define regulator_77802_desc_234_buck(num) { \
.name = "BUCK"#num, \
.of_match = of_match_ptr("BUCK"#num), \
.regulators_node = of_match_ptr("regulators"), \
.id = MAX77802_BUCK##num, \
.supply_name = "inb"#num, \
.ops = &max77802_buck_234_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.min_uV = 600000, \
.uV_step = 6250, \
.ramp_delay = MAX77802_RAMP_DELAY, \
.n_voltages = 0x91, \
.vsel_reg = MAX77802_REG_BUCK ## num ## DVS1, \
.vsel_mask = MAX77802_DVS_VSEL_MASK, \
.enable_reg = MAX77802_REG_BUCK ## num ## CTRL1, \
.enable_mask = MAX77802_OPMODE_MASK << \
MAX77802_OPMODE_BUCK234_SHIFT, \
.of_map_mode = max77802_map_mode, \
}
/* BUCK 5 */
#define regulator_77802_desc_buck5(num) { \
.name = "BUCK"#num, \
.of_match = of_match_ptr("BUCK"#num), \
.regulators_node = of_match_ptr("regulators"), \
.id = MAX77802_BUCK##num, \
.supply_name = "inb"#num, \
.ops = &max77802_buck_dvs_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.min_uV = 750000, \
.uV_step = 50000, \
.ramp_delay = MAX77802_RAMP_DELAY, \
.n_voltages = 1 << 6, \
.vsel_reg = MAX77802_REG_BUCK5OUT, \
.vsel_mask = MAX77802_VSEL_MASK, \
.enable_reg = MAX77802_REG_BUCK5CTRL, \
.enable_mask = MAX77802_OPMODE_MASK, \
.of_map_mode = max77802_map_mode, \
}
/* BUCKs 7-10 */
#define regulator_77802_desc_buck7_10(num) { \
.name = "BUCK"#num, \
.of_match = of_match_ptr("BUCK"#num), \
.regulators_node = of_match_ptr("regulators"), \
.id = MAX77802_BUCK##num, \
.supply_name = "inb"#num, \
.ops = &max77802_buck_dvs_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.min_uV = 750000, \
.uV_step = 50000, \
.ramp_delay = MAX77802_RAMP_DELAY, \
.n_voltages = 1 << 6, \
.vsel_reg = MAX77802_REG_BUCK7OUT + (num - 7) * 3, \
.vsel_mask = MAX77802_VSEL_MASK, \
.enable_reg = MAX77802_REG_BUCK7CTRL + (num - 7) * 3, \
.enable_mask = MAX77802_OPMODE_MASK, \
.of_map_mode = max77802_map_mode, \
}
static const struct regulator_desc regulators[] = {
regulator_77802_desc_16_buck(1),
regulator_77802_desc_234_buck(2),
regulator_77802_desc_234_buck(3),
regulator_77802_desc_234_buck(4),
regulator_77802_desc_buck5(5),
regulator_77802_desc_16_buck(6),
regulator_77802_desc_buck7_10(7),
regulator_77802_desc_buck7_10(8),
regulator_77802_desc_buck7_10(9),
regulator_77802_desc_buck7_10(10),
regulator_77802_desc_n_ldo(1, 10, 2),
regulator_77802_desc_n_ldo(2, 10, 1),
regulator_77802_desc_p_ldo(3, 3, 2),
regulator_77802_desc_p_ldo(4, 6, 1),
regulator_77802_desc_p_ldo(5, 3, 1),
regulator_77802_desc_p_ldo(6, 3, 1),
regulator_77802_desc_p_ldo(7, 3, 1),
regulator_77802_desc_n_ldo(8, 1, 1),
regulator_77802_desc_p_ldo(9, 5, 1),
regulator_77802_desc_p_ldo(10, 4, 1),
regulator_77802_desc_p_ldo(11, 4, 1),
regulator_77802_desc_p_ldo(12, 9, 1),
regulator_77802_desc_p_ldo(13, 4, 1),
regulator_77802_desc_p_ldo(14, 4, 1),
regulator_77802_desc_n_ldo(15, 1, 1),
regulator_77802_desc_n_ldo(17, 2, 1),
regulator_77802_desc_p_ldo(18, 7, 1),
regulator_77802_desc_p_ldo(19, 5, 1),
regulator_77802_desc_p_ldo(20, 7, 2),
regulator_77802_desc_p_ldo(21, 6, 2),
regulator_77802_desc_p_ldo(23, 9, 1),
regulator_77802_desc_p_ldo(24, 6, 1),
regulator_77802_desc_p_ldo(25, 9, 1),
regulator_77802_desc_p_ldo(26, 9, 1),
regulator_77802_desc_n_ldo(27, 2, 1),
regulator_77802_desc_p_ldo(28, 7, 1),
regulator_77802_desc_p_ldo(29, 7, 1),
regulator_77802_desc_n_ldo(30, 2, 1),
regulator_77802_desc_p_ldo(32, 9, 1),
regulator_77802_desc_p_ldo(33, 6, 1),
regulator_77802_desc_p_ldo(34, 9, 1),
regulator_77802_desc_n_ldo(35, 2, 1),
};
static int max77802_pmic_probe(struct platform_device *pdev)
{
struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
struct max77802_regulator_prv *max77802;
int i, val;
struct regulator_config config = { };
max77802 = devm_kzalloc(&pdev->dev,
sizeof(struct max77802_regulator_prv),
GFP_KERNEL);
if (!max77802)
return -ENOMEM;
config.dev = iodev->dev;
config.regmap = iodev->regmap;
config.driver_data = max77802;
platform_set_drvdata(pdev, max77802);
for (i = 0; i < MAX77802_REG_MAX; i++) {
struct regulator_dev *rdev;
int id = regulators[i].id;
int shift = max77802_get_opmode_shift(id);
int ret;
ret = regmap_read(iodev->regmap, regulators[i].enable_reg, &val);
if (ret < 0) {
dev_warn(&pdev->dev,
"cannot read current mode for %d\n", i);
val = MAX77802_OPMODE_NORMAL;
} else {
val = val >> shift & MAX77802_OPMODE_MASK;
}
/*
* If the regulator is disabled and the system warm rebooted,
* the hardware reports OFF as the regulator operating mode.
* Default to operating mode NORMAL in that case.
*/
if (val == MAX77802_STATUS_OFF)
max77802->opmode[id] = MAX77802_OPMODE_NORMAL;
else
max77802->opmode[id] = val;
rdev = devm_regulator_register(&pdev->dev,
®ulators[i], &config);
if (IS_ERR(rdev)) {
ret = PTR_ERR(rdev);
dev_err(&pdev->dev,
"regulator init failed for %d: %d\n", i, ret);
return ret;
}
}
return 0;
}
static const struct platform_device_id max77802_pmic_id[] = {
{"max77802-pmic", 0},
{ },
};
MODULE_DEVICE_TABLE(platform, max77802_pmic_id);
static struct platform_driver max77802_pmic_driver = {
.driver = {
.name = "max77802-pmic",
},
.probe = max77802_pmic_probe,
.id_table = max77802_pmic_id,
};
module_platform_driver(max77802_pmic_driver);
MODULE_DESCRIPTION("MAXIM 77802 Regulator Driver");
MODULE_AUTHOR("Simon Glass <[email protected]>");
MODULE_LICENSE("GPL");