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[mirror_ubuntu-jammy-kernel.git] / drivers / regulator / max8997.c
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bd6ca2cf
MH		 1/*
2 * max8997.c - Regulator driver for the Maxim 8997/8966
3 *
4 * Copyright (C) 2011 Samsung Electronics
5 * MyungJoo Ham <myungjoo.ham@smasung.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 *
21 * This driver is based on max8998.c
22 */
23
24#include <linux/bug.h>
bd6ca2cf
MH		 25#include <linux/err.h>
26#include <linux/gpio.h>
77b71b37 27#include <linux/of_gpio.h>
bd6ca2cf 28#include <linux/slab.h>
65602c32 29#include <linux/module.h>
bd6ca2cf
MH		 30#include <linux/platform_device.h>
31#include <linux/regulator/driver.h>
32#include <linux/regulator/machine.h>
33#include <linux/mfd/max8997.h>
34#include <linux/mfd/max8997-private.h>
77b71b37 35#include <linux/regulator/of_regulator.h>
bd6ca2cf
MH		 36
37struct max8997_data {
38 struct device *dev;
39 struct max8997_dev *iodev;
40 int num_regulators;
41 struct regulator_dev **rdev;
42 int ramp_delay; /* in mV/us */
43
6e0414a5
MH		 44 bool buck1_gpiodvs;
45 bool buck2_gpiodvs;
46 bool buck5_gpiodvs;
bd6ca2cf
MH		 47 u8 buck1_vol[8];
48 u8 buck2_vol[8];
49 u8 buck5_vol[8];
6e0414a5 50 int buck125_gpios[3];
bd6ca2cf 51 int buck125_gpioindex;
6e0414a5 52 bool ignore_gpiodvs_side_effect;
bd6ca2cf
MH		 53
54 u8 saved_states[MAX8997_REG_MAX];
55};
56
57static inline void max8997_set_gpio(struct max8997_data *max8997)
58{
bd6ca2cf
MH		 59 int set3 = (max8997->buck125_gpioindex) & 0x1;
60 int set2 = ((max8997->buck125_gpioindex) >> 1) & 0x1;
61 int set1 = ((max8997->buck125_gpioindex) >> 2) & 0x1;
62
6e0414a5
MH		 63 gpio_set_value(max8997->buck125_gpios[0], set1);
64 gpio_set_value(max8997->buck125_gpios[1], set2);
65 gpio_set_value(max8997->buck125_gpios[2], set3);
bd6ca2cf
MH		 66}
67
68struct voltage_map_desc {
69 int min;
70 int max;
71 int step;
bd6ca2cf
MH		 72};
73
bc3b7756 74/* Voltage maps in uV */
bd6ca2cf 75static const struct voltage_map_desc ldo_voltage_map_desc = {
bc3b7756 76 .min = 800000, .max = 3950000, .step = 50000,
bd6ca2cf
MH		 77}; /* LDO1 ~ 18, 21 all */
78
79static const struct voltage_map_desc buck1245_voltage_map_desc = {
bc3b7756 80 .min = 650000, .max = 2225000, .step = 25000,
bd6ca2cf
MH		 81}; /* Buck1, 2, 4, 5 */
82
83static const struct voltage_map_desc buck37_voltage_map_desc = {
bc3b7756 84 .min = 750000, .max = 3900000, .step = 50000,
bd6ca2cf
MH		 85}; /* Buck3, 7 */
86
bc3b7756 87/* current map in uA */
bd6ca2cf 88static const struct voltage_map_desc charger_current_map_desc = {
bc3b7756 89 .min = 200000, .max = 950000, .step = 50000,
bd6ca2cf
MH		 90};
91
92static const struct voltage_map_desc topoff_current_map_desc = {
bc3b7756 93 .min = 50000, .max = 200000, .step = 10000,
bd6ca2cf
MH		 94};
95
96static const struct voltage_map_desc *reg_voltage_map[] = {
97 [MAX8997_LDO1] = &ldo_voltage_map_desc,
98 [MAX8997_LDO2] = &ldo_voltage_map_desc,
99 [MAX8997_LDO3] = &ldo_voltage_map_desc,
100 [MAX8997_LDO4] = &ldo_voltage_map_desc,
101 [MAX8997_LDO5] = &ldo_voltage_map_desc,
102 [MAX8997_LDO6] = &ldo_voltage_map_desc,
103 [MAX8997_LDO7] = &ldo_voltage_map_desc,
104 [MAX8997_LDO8] = &ldo_voltage_map_desc,
105 [MAX8997_LDO9] = &ldo_voltage_map_desc,
106 [MAX8997_LDO10] = &ldo_voltage_map_desc,
107 [MAX8997_LDO11] = &ldo_voltage_map_desc,
108 [MAX8997_LDO12] = &ldo_voltage_map_desc,
109 [MAX8997_LDO13] = &ldo_voltage_map_desc,
110 [MAX8997_LDO14] = &ldo_voltage_map_desc,
111 [MAX8997_LDO15] = &ldo_voltage_map_desc,
112 [MAX8997_LDO16] = &ldo_voltage_map_desc,
113 [MAX8997_LDO17] = &ldo_voltage_map_desc,
114 [MAX8997_LDO18] = &ldo_voltage_map_desc,
115 [MAX8997_LDO21] = &ldo_voltage_map_desc,
116 [MAX8997_BUCK1] = &buck1245_voltage_map_desc,
117 [MAX8997_BUCK2] = &buck1245_voltage_map_desc,
118 [MAX8997_BUCK3] = &buck37_voltage_map_desc,
119 [MAX8997_BUCK4] = &buck1245_voltage_map_desc,
120 [MAX8997_BUCK5] = &buck1245_voltage_map_desc,
121 [MAX8997_BUCK6] = NULL,
122 [MAX8997_BUCK7] = &buck37_voltage_map_desc,
123 [MAX8997_EN32KHZ_AP] = NULL,
124 [MAX8997_EN32KHZ_CP] = NULL,
125 [MAX8997_ENVICHG] = NULL,
126 [MAX8997_ESAFEOUT1] = NULL,
127 [MAX8997_ESAFEOUT2] = NULL,
128 [MAX8997_CHARGER_CV] = NULL,
129 [MAX8997_CHARGER] = &charger_current_map_desc,
130 [MAX8997_CHARGER_TOPOFF] = &topoff_current_map_desc,
131};
132
bd6ca2cf
MH		 133static int max8997_list_voltage_safeout(struct regulator_dev *rdev,
134 unsigned int selector)
135{
b3e1348e 136 int rid = rdev_get_id(rdev);
bd6ca2cf
MH		 137
138 if (rid == MAX8997_ESAFEOUT1 || rid == MAX8997_ESAFEOUT2) {
139 switch (selector) {
140 case 0:
141 return 4850000;
142 case 1:
143 return 4900000;
144 case 2:
145 return 4950000;
146 case 3:
147 return 3300000;
148 default:
149 return -EINVAL;
150 }
151 }
152
153 return -EINVAL;
154}
155
156static int max8997_list_voltage_charger_cv(struct regulator_dev *rdev,
157 unsigned int selector)
158{
b3e1348e 159 int rid = rdev_get_id(rdev);
bd6ca2cf
MH		 160
161 if (rid != MAX8997_CHARGER_CV)
162 goto err;
163
164 switch (selector) {
165 case 0x00:
166 return 4200000;
167 case 0x01 ... 0x0E:
168 return 4000000 + 20000 * (selector - 0x01);
169 case 0x0F:
170 return 4350000;
171 default:
172 return -EINVAL;
173 }
174err:
175 return -EINVAL;
176}
177
178static int max8997_list_voltage(struct regulator_dev *rdev,
179 unsigned int selector)
180{
181 const struct voltage_map_desc *desc;
b3e1348e 182 int rid = rdev_get_id(rdev);
bd6ca2cf
MH		 183 int val;
184
185 if (rid >= ARRAY_SIZE(reg_voltage_map) ||
186 rid < 0)
187 return -EINVAL;
188
189 desc = reg_voltage_map[rid];
190 if (desc == NULL)
191 return -EINVAL;
192
193 val = desc->min + desc->step * selector;
194 if (val > desc->max)
195 return -EINVAL;
196
bc3b7756 197 return val;
bd6ca2cf
MH		 198}
199
200static int max8997_get_enable_register(struct regulator_dev *rdev,
201 int *reg, int *mask, int *pattern)
202{
b3e1348e 203 int rid = rdev_get_id(rdev);
bd6ca2cf
MH		 204
205 switch (rid) {
206 case MAX8997_LDO1 ... MAX8997_LDO21:
207 *reg = MAX8997_REG_LDO1CTRL + (rid - MAX8997_LDO1);
208 *mask = 0xC0;
209 *pattern = 0xC0;
210 break;
211 case MAX8997_BUCK1:
212 *reg = MAX8997_REG_BUCK1CTRL;
213 *mask = 0x01;
214 *pattern = 0x01;
215 break;
216 case MAX8997_BUCK2:
217 *reg = MAX8997_REG_BUCK2CTRL;
218 *mask = 0x01;
219 *pattern = 0x01;
220 break;
221 case MAX8997_BUCK3:
222 *reg = MAX8997_REG_BUCK3CTRL;
223 *mask = 0x01;
224 *pattern = 0x01;
225 break;
226 case MAX8997_BUCK4:
227 *reg = MAX8997_REG_BUCK4CTRL;
228 *mask = 0x01;
229 *pattern = 0x01;
230 break;
231 case MAX8997_BUCK5:
232 *reg = MAX8997_REG_BUCK5CTRL;
233 *mask = 0x01;
234 *pattern = 0x01;
235 break;
236 case MAX8997_BUCK6:
237 *reg = MAX8997_REG_BUCK6CTRL;
238 *mask = 0x01;
239 *pattern = 0x01;
240 break;
241 case MAX8997_BUCK7:
242 *reg = MAX8997_REG_BUCK7CTRL;
243 *mask = 0x01;
244 *pattern = 0x01;
245 break;
246 case MAX8997_EN32KHZ_AP ... MAX8997_EN32KHZ_CP:
247 *reg = MAX8997_REG_MAINCON1;
248 *mask = 0x01 << (rid - MAX8997_EN32KHZ_AP);
249 *pattern = 0x01 << (rid - MAX8997_EN32KHZ_AP);
250 break;
251 case MAX8997_ENVICHG:
252 *reg = MAX8997_REG_MBCCTRL1;
253 *mask = 0x80;
254 *pattern = 0x80;
255 break;
256 case MAX8997_ESAFEOUT1 ... MAX8997_ESAFEOUT2:
257 *reg = MAX8997_REG_SAFEOUTCTRL;
258 *mask = 0x40 << (rid - MAX8997_ESAFEOUT1);
259 *pattern = 0x40 << (rid - MAX8997_ESAFEOUT1);
260 break;
261 case MAX8997_CHARGER:
262 *reg = MAX8997_REG_MBCCTRL2;
263 *mask = 0x40;
264 *pattern = 0x40;
265 break;
266 default:
267 /* Not controllable or not exists */
268 return -EINVAL;
bd6ca2cf
MH		 269 }
270
271 return 0;
272}
273
274static int max8997_reg_is_enabled(struct regulator_dev *rdev)
275{
276 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
277 struct i2c_client *i2c = max8997->iodev->i2c;
278 int ret, reg, mask, pattern;
279 u8 val;
280
281 ret = max8997_get_enable_register(rdev, &reg, &mask, &pattern);
c245c087 282 if (ret)
bd6ca2cf
MH		 283 return ret;
284
285 ret = max8997_read_reg(i2c, reg, &val);
286 if (ret)
287 return ret;
288
289 return (val & mask) == pattern;
290}
291
292static int max8997_reg_enable(struct regulator_dev *rdev)
293{
294 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
295 struct i2c_client *i2c = max8997->iodev->i2c;
296 int ret, reg, mask, pattern;
297
298 ret = max8997_get_enable_register(rdev, &reg, &mask, &pattern);
299 if (ret)
300 return ret;
301
302 return max8997_update_reg(i2c, reg, pattern, mask);
303}
304
305static int max8997_reg_disable(struct regulator_dev *rdev)
306{
307 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
308 struct i2c_client *i2c = max8997->iodev->i2c;
309 int ret, reg, mask, pattern;
310
311 ret = max8997_get_enable_register(rdev, &reg, &mask, &pattern);
312 if (ret)
313 return ret;
314
315 return max8997_update_reg(i2c, reg, ~pattern, mask);
316}
317
318static int max8997_get_voltage_register(struct regulator_dev *rdev,
319 int *_reg, int *_shift, int *_mask)
320{
6f43c380 321 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
b3e1348e 322 int rid = rdev_get_id(rdev);
bd6ca2cf
MH		 323 int reg, shift = 0, mask = 0x3f;
324
325 switch (rid) {
326 case MAX8997_LDO1 ... MAX8997_LDO21:
327 reg = MAX8997_REG_LDO1CTRL + (rid - MAX8997_LDO1);
328 break;
329 case MAX8997_BUCK1:
330 reg = MAX8997_REG_BUCK1DVS1;
6f43c380
AL		 331 if (max8997->buck1_gpiodvs)
332 reg += max8997->buck125_gpioindex;
bd6ca2cf
MH		 333 break;
334 case MAX8997_BUCK2:
335 reg = MAX8997_REG_BUCK2DVS1;
6f43c380
AL		 336 if (max8997->buck2_gpiodvs)
337 reg += max8997->buck125_gpioindex;
bd6ca2cf
MH		 338 break;
339 case MAX8997_BUCK3:
340 reg = MAX8997_REG_BUCK3DVS;
341 break;
342 case MAX8997_BUCK4:
343 reg = MAX8997_REG_BUCK4DVS;
344 break;
345 case MAX8997_BUCK5:
346 reg = MAX8997_REG_BUCK5DVS1;
6f43c380
AL		 347 if (max8997->buck5_gpiodvs)
348 reg += max8997->buck125_gpioindex;
bd6ca2cf
MH		 349 break;
350 case MAX8997_BUCK7:
351 reg = MAX8997_REG_BUCK7DVS;
352 break;
353 case MAX8997_ESAFEOUT1 ... MAX8997_ESAFEOUT2:
354 reg = MAX8997_REG_SAFEOUTCTRL;
355 shift = (rid == MAX8997_ESAFEOUT2) ? 2 : 0;
356 mask = 0x3;
357 break;
358 case MAX8997_CHARGER_CV:
359 reg = MAX8997_REG_MBCCTRL3;
360 shift = 0;
361 mask = 0xf;
362 break;
363 case MAX8997_CHARGER:
364 reg = MAX8997_REG_MBCCTRL4;
365 shift = 0;
366 mask = 0xf;
367 break;
368 case MAX8997_CHARGER_TOPOFF:
369 reg = MAX8997_REG_MBCCTRL5;
370 shift = 0;
371 mask = 0xf;
372 break;
373 default:
374 return -EINVAL;
375 }
376
377 *_reg = reg;
378 *_shift = shift;
379 *_mask = mask;
380
381 return 0;
382}
383
9e96b3a7 384static int max8997_get_voltage_sel(struct regulator_dev *rdev)
bd6ca2cf
MH		 385{
386 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
bd6ca2cf
MH		 387 struct i2c_client *i2c = max8997->iodev->i2c;
388 int reg, shift, mask, ret;
bd6ca2cf
MH		 389 u8 val;
390
391 ret = max8997_get_voltage_register(rdev, &reg, &shift, &mask);
392 if (ret)
393 return ret;
394
bd6ca2cf
MH		 395 ret = max8997_read_reg(i2c, reg, &val);
396 if (ret)
397 return ret;
398
399 val >>= shift;
400 val &= mask;
401
9e96b3a7 402 return val;
bd6ca2cf
MH		 403}
404
405static inline int max8997_get_voltage_proper_val(
406 const struct voltage_map_desc *desc,
407 int min_vol, int max_vol)
408{
2358b776 409 int i;
bd6ca2cf
MH		 410
411 if (desc == NULL)
412 return -EINVAL;
413
414 if (max_vol < desc->min || min_vol > desc->max)
415 return -EINVAL;
416
2358b776
AL		 417 if (min_vol < desc->min)
418 min_vol = desc->min;
bd6ca2cf 419
2358b776 420 i = DIV_ROUND_UP(min_vol - desc->min, desc->step);
bd6ca2cf 421
bd6ca2cf 422 if (desc->min + desc->step * i > max_vol)
bd6ca2cf
MH		 423 return -EINVAL;
424
425 return i;
426}
427
428static int max8997_set_voltage_charger_cv(struct regulator_dev *rdev,
429 int min_uV, int max_uV, unsigned *selector)
430{
431 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
432 struct i2c_client *i2c = max8997->iodev->i2c;
b3e1348e 433 int rid = rdev_get_id(rdev);
bd6ca2cf
MH		 434 int lb, ub;
435 int reg, shift = 0, mask, ret = 0;
436 u8 val = 0x0;
437
438 if (rid != MAX8997_CHARGER_CV)
439 return -EINVAL;
440
441 ret = max8997_get_voltage_register(rdev, &reg, &shift, &mask);
442 if (ret)
443 return ret;
444
445 if (max_uV < 4000000 || min_uV > 4350000)
446 return -EINVAL;
447
448 if (min_uV <= 4000000) {
449 if (max_uV >= 4000000)
450 return -EINVAL;
451 else
452 val = 0x1;
453 } else if (min_uV <= 4200000 && max_uV >= 4200000)
454 val = 0x0;
455 else {
456 lb = (min_uV - 4000001) / 20000 + 2;
457 ub = (max_uV - 4000000) / 20000 + 1;
458
459 if (lb > ub)
460 return -EINVAL;
461
462 if (lb < 0xf)
463 val = lb;
464 else {
465 if (ub >= 0xf)
466 val = 0xf;
467 else
468 return -EINVAL;
469 }
470 }
471
472 *selector = val;
473
474 ret = max8997_update_reg(i2c, reg, val << shift, mask);
475
476 return ret;
477}
478
479/*
480 * For LDO1 ~ LDO21, BUCK1~5, BUCK7, CHARGER, CHARGER_TOPOFF
481 * BUCK1, 2, and 5 are available if they are not controlled by gpio
482 */
483static int max8997_set_voltage_ldobuck(struct regulator_dev *rdev,
484 int min_uV, int max_uV, unsigned *selector)
485{
486 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
487 struct i2c_client *i2c = max8997->iodev->i2c;
bd6ca2cf 488 const struct voltage_map_desc *desc;
b3e1348e 489 int rid = rdev_get_id(rdev);
62bc4d4a 490 int i, reg, shift, mask, ret;
bd6ca2cf
MH		 491
492 switch (rid) {
493 case MAX8997_LDO1 ... MAX8997_LDO21:
494 break;
495 case MAX8997_BUCK1 ... MAX8997_BUCK5:
496 break;
497 case MAX8997_BUCK6:
498 return -EINVAL;
499 case MAX8997_BUCK7:
500 break;
501 case MAX8997_CHARGER:
502 break;
503 case MAX8997_CHARGER_TOPOFF:
504 break;
505 default:
506 return -EINVAL;
507 }
508
509 desc = reg_voltage_map[rid];
510
bc3b7756 511 i = max8997_get_voltage_proper_val(desc, min_uV, max_uV);
bd6ca2cf
MH		 512 if (i < 0)
513 return i;
514
515 ret = max8997_get_voltage_register(rdev, &reg, &shift, &mask);
516 if (ret)
517 return ret;
518
bd6ca2cf
MH		 519 ret = max8997_update_reg(i2c, reg, i << shift, mask << shift);
520 *selector = i;
521
62bc4d4a
AL		 522 return ret;
523}
524
525static int max8997_set_voltage_ldobuck_time_sel(struct regulator_dev *rdev,
526 unsigned int old_selector,
527 unsigned int new_selector)
528{
529 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
530 int rid = rdev_get_id(rdev);
531 const struct voltage_map_desc *desc = reg_voltage_map[rid];
532
533 /* Delay is required only if the voltage is increasing */
534 if (old_selector >= new_selector)
535 return 0;
536
537 /* No need to delay if gpio_dvs_mode */
538 switch (rid) {
539 case MAX8997_BUCK1:
540 if (max8997->buck1_gpiodvs)
541 return 0;
542 break;
543 case MAX8997_BUCK2:
544 if (max8997->buck2_gpiodvs)
545 return 0;
546 break;
547 case MAX8997_BUCK5:
548 if (max8997->buck5_gpiodvs)
549 return 0;
550 break;
bd6ca2cf
MH		 551 }
552
62bc4d4a
AL		 553 switch (rid) {
554 case MAX8997_BUCK1:
555 case MAX8997_BUCK2:
556 case MAX8997_BUCK4:
557 case MAX8997_BUCK5:
558 return DIV_ROUND_UP(desc->step * (new_selector - old_selector),
bc3b7756 559 max8997->ramp_delay * 1000);
bd6ca2cf
MH		 560 }
561
62bc4d4a 562 return 0;
bd6ca2cf
MH		 563}
564
565/*
566 * Assess the damage on the voltage setting of BUCK1,2,5 by the change.
567 *
568 * When GPIO-DVS mode is used for multiple bucks, changing the voltage value
569 * of one of the bucks may affect that of another buck, which is the side
570 * effect of the change (set_voltage). This function examines the GPIO-DVS
571 * configurations and checks whether such side-effect exists.
572 */
573static int max8997_assess_side_effect(struct regulator_dev *rdev,
574 u8 new_val, int *best)
575{
576 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
b3e1348e 577 int rid = rdev_get_id(rdev);
bd6ca2cf
MH		 578 u8 *buckx_val[3];
579 bool buckx_gpiodvs[3];
580 int side_effect[8];
581 int min_side_effect = INT_MAX;
582 int i;
583
584 *best = -1;
585
586 switch (rid) {
587 case MAX8997_BUCK1:
588 rid = 0;
589 break;
590 case MAX8997_BUCK2:
591 rid = 1;
592 break;
593 case MAX8997_BUCK5:
594 rid = 2;
595 break;
596 default:
597 return -EINVAL;
598 }
599
600 buckx_val[0] = max8997->buck1_vol;
601 buckx_val[1] = max8997->buck2_vol;
602 buckx_val[2] = max8997->buck5_vol;
6e0414a5
MH		 603 buckx_gpiodvs[0] = max8997->buck1_gpiodvs;
604 buckx_gpiodvs[1] = max8997->buck2_gpiodvs;
605 buckx_gpiodvs[2] = max8997->buck5_gpiodvs;
bd6ca2cf
MH		 606
607 for (i = 0; i < 8; i++) {
608 int others;
609
610 if (new_val != (buckx_val[rid])[i]) {
611 side_effect[i] = -1;
612 continue;
613 }
614
615 side_effect[i] = 0;
616 for (others = 0; others < 3; others++) {
617 int diff;
618
619 if (others == rid)
620 continue;
621 if (buckx_gpiodvs[others] == false)
622 continue; /* Not affected */
623 diff = (buckx_val[others])[i] -
624 (buckx_val[others])[max8997->buck125_gpioindex];
625 if (diff > 0)
626 side_effect[i] += diff;
627 else if (diff < 0)
628 side_effect[i] -= diff;
629 }
630 if (side_effect[i] == 0) {
631 *best = i;
632 return 0; /* NO SIDE EFFECT! Use This! */
633 }
634 if (side_effect[i] < min_side_effect) {
635 min_side_effect = side_effect[i];
636 *best = i;
637 }
638 }
639
640 if (*best == -1)
641 return -EINVAL;
642
643 return side_effect[*best];
644}
645
646/*
647 * For Buck 1 ~ 5 and 7. If it is not controlled by GPIO, this calls
648 * max8997_set_voltage_ldobuck to do the job.
649 */
650static int max8997_set_voltage_buck(struct regulator_dev *rdev,
651 int min_uV, int max_uV, unsigned *selector)
652{
653 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
b3e1348e 654 int rid = rdev_get_id(rdev);
bd6ca2cf
MH		 655 const struct voltage_map_desc *desc;
656 int new_val, new_idx, damage, tmp_val, tmp_idx, tmp_dmg;
657 bool gpio_dvs_mode = false;
bd6ca2cf
MH		 658
659 if (rid < MAX8997_BUCK1 || rid > MAX8997_BUCK7)
660 return -EINVAL;
661
662 switch (rid) {
663 case MAX8997_BUCK1:
6e0414a5 664 if (max8997->buck1_gpiodvs)
bd6ca2cf
MH		 665 gpio_dvs_mode = true;
666 break;
667 case MAX8997_BUCK2:
6e0414a5 668 if (max8997->buck2_gpiodvs)
bd6ca2cf
MH		 669 gpio_dvs_mode = true;
670 break;
671 case MAX8997_BUCK5:
6e0414a5 672 if (max8997->buck5_gpiodvs)
bd6ca2cf
MH		 673 gpio_dvs_mode = true;
674 break;
675 }
676
677 if (!gpio_dvs_mode)
678 return max8997_set_voltage_ldobuck(rdev, min_uV, max_uV,
679 selector);
680
681 desc = reg_voltage_map[rid];
bc3b7756 682 new_val = max8997_get_voltage_proper_val(desc, min_uV, max_uV);
bd6ca2cf
MH		 683 if (new_val < 0)
684 return new_val;
685
686 tmp_dmg = INT_MAX;
687 tmp_idx = -1;
688 tmp_val = -1;
689 do {
690 damage = max8997_assess_side_effect(rdev, new_val, &new_idx);
691 if (damage == 0)
692 goto out;
693
694 if (tmp_dmg > damage) {
695 tmp_idx = new_idx;
696 tmp_val = new_val;
697 tmp_dmg = damage;
698 }
699
700 new_val++;
f55205f4 701 } while (desc->min + desc->step * new_val <= desc->max);
bd6ca2cf
MH		 702
703 new_idx = tmp_idx;
704 new_val = tmp_val;
705
6e0414a5 706 if (max8997->ignore_gpiodvs_side_effect == false)
bd6ca2cf
MH		 707 return -EINVAL;
708
709 dev_warn(&rdev->dev, "MAX8997 GPIO-DVS Side Effect Warning: GPIO SET:"
710 " %d -> %d\n", max8997->buck125_gpioindex, tmp_idx);
711
712out:
713 if (new_idx < 0 || new_val < 0)
714 return -EINVAL;
715
716 max8997->buck125_gpioindex = new_idx;
717 max8997_set_gpio(max8997);
718 *selector = new_val;
719
720 return 0;
721}
722
723static const int safeoutvolt[] = {
724 3300000,
725 4850000,
726 4900000,
727 4950000,
728};
729
730/* For SAFEOUT1 and SAFEOUT2 */
731static int max8997_set_voltage_safeout(struct regulator_dev *rdev,
732 int min_uV, int max_uV, unsigned *selector)
733{
734 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
735 struct i2c_client *i2c = max8997->iodev->i2c;
b3e1348e 736 int rid = rdev_get_id(rdev);
bd6ca2cf
MH		 737 int reg, shift = 0, mask, ret;
738 int i = 0;
739 u8 val;
740
741 if (rid != MAX8997_ESAFEOUT1 && rid != MAX8997_ESAFEOUT2)
742 return -EINVAL;
743
744 for (i = 0; i < ARRAY_SIZE(safeoutvolt); i++) {
745 if (min_uV <= safeoutvolt[i] &&
746 max_uV >= safeoutvolt[i])
747 break;
748 }
749
750 if (i >= ARRAY_SIZE(safeoutvolt))
751 return -EINVAL;
752
753 if (i == 0)
754 val = 0x3;
755 else
756 val = i - 1;
757
758 ret = max8997_get_voltage_register(rdev, &reg, &shift, &mask);
759 if (ret)
760 return ret;
761
762 ret = max8997_update_reg(i2c, reg, val << shift, mask << shift);
763 *selector = val;
764
765 return ret;
766}
767
bd6ca2cf
MH		 768static int max8997_reg_disable_suspend(struct regulator_dev *rdev)
769{
770 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
771 struct i2c_client *i2c = max8997->iodev->i2c;
772 int ret, reg, mask, pattern;
b3e1348e 773 int rid = rdev_get_id(rdev);
bd6ca2cf
MH		 774
775 ret = max8997_get_enable_register(rdev, &reg, &mask, &pattern);
776 if (ret)
777 return ret;
778
779 max8997_read_reg(i2c, reg, &max8997->saved_states[rid]);
780
781 if (rid == MAX8997_LDO1 ||
782 rid == MAX8997_LDO10 ||
783 rid == MAX8997_LDO21) {
784 dev_dbg(&rdev->dev, "Conditional Power-Off for %s\n",
785 rdev->desc->name);
786 return max8997_update_reg(i2c, reg, 0x40, mask);
787 }
788
789 dev_dbg(&rdev->dev, "Full Power-Off for %s (%xh -> %xh)\n",
790 rdev->desc->name, max8997->saved_states[rid] & mask,
791 (~pattern) & mask);
792 return max8997_update_reg(i2c, reg, ~pattern, mask);
793}
794
795static struct regulator_ops max8997_ldo_ops = {
796 .list_voltage = max8997_list_voltage,
797 .is_enabled = max8997_reg_is_enabled,
798 .enable = max8997_reg_enable,
799 .disable = max8997_reg_disable,
9e96b3a7 800 .get_voltage_sel = max8997_get_voltage_sel,
bd6ca2cf 801 .set_voltage = max8997_set_voltage_ldobuck,
62bc4d4a 802 .set_voltage_time_sel = max8997_set_voltage_ldobuck_time_sel,
bd6ca2cf
MH		 803 .set_suspend_disable = max8997_reg_disable_suspend,
804};
805
806static struct regulator_ops max8997_buck_ops = {
807 .list_voltage = max8997_list_voltage,
808 .is_enabled = max8997_reg_is_enabled,
809 .enable = max8997_reg_enable,
810 .disable = max8997_reg_disable,
9e96b3a7 811 .get_voltage_sel = max8997_get_voltage_sel,
bd6ca2cf 812 .set_voltage = max8997_set_voltage_buck,
62bc4d4a 813 .set_voltage_time_sel = max8997_set_voltage_ldobuck_time_sel,
bd6ca2cf
MH		 814 .set_suspend_disable = max8997_reg_disable_suspend,
815};
816
817static struct regulator_ops max8997_fixedvolt_ops = {
818 .list_voltage = max8997_list_voltage,
819 .is_enabled = max8997_reg_is_enabled,
820 .enable = max8997_reg_enable,
821 .disable = max8997_reg_disable,
bd6ca2cf
MH		 822 .set_suspend_disable = max8997_reg_disable_suspend,
823};
824
825static struct regulator_ops max8997_safeout_ops = {
826 .list_voltage = max8997_list_voltage_safeout,
827 .is_enabled = max8997_reg_is_enabled,
828 .enable = max8997_reg_enable,
829 .disable = max8997_reg_disable,
9e96b3a7 830 .get_voltage_sel = max8997_get_voltage_sel,
bd6ca2cf 831 .set_voltage = max8997_set_voltage_safeout,
bd6ca2cf
MH		 832 .set_suspend_disable = max8997_reg_disable_suspend,
833};
834
835static struct regulator_ops max8997_fixedstate_ops = {
836 .list_voltage = max8997_list_voltage_charger_cv,
9e96b3a7 837 .get_voltage_sel = max8997_get_voltage_sel,
bd6ca2cf
MH		 838 .set_voltage = max8997_set_voltage_charger_cv,
839};
840
9e96b3a7
AL		 841static int max8997_set_current_limit(struct regulator_dev *rdev,
842 int min_uA, int max_uA)
bd6ca2cf
MH		 843{
844 unsigned dummy;
9e96b3a7 845 int rid = rdev_get_id(rdev);
bd6ca2cf 846
9e96b3a7
AL		 847 if (rid != MAX8997_CHARGER && rid != MAX8997_CHARGER_TOPOFF)
848 return -EINVAL;
bd6ca2cf 849
9e96b3a7
AL		 850 /* Reuse max8997_set_voltage_ldobuck to set current_limit. */
851 return max8997_set_voltage_ldobuck(rdev, min_uA, max_uA, &dummy);
bd6ca2cf
MH		 852}
853
9e96b3a7
AL		 854static int max8997_get_current_limit(struct regulator_dev *rdev)
855{
856 int sel, rid = rdev_get_id(rdev);
857
858 if (rid != MAX8997_CHARGER && rid != MAX8997_CHARGER_TOPOFF)
859 return -EINVAL;
860
861 sel = max8997_get_voltage_sel(rdev);
862 if (sel < 0)
863 return sel;
864
865 /* Reuse max8997_list_voltage to get current_limit. */
866 return max8997_list_voltage(rdev, sel);
867}
bd6ca2cf
MH		 868
869static struct regulator_ops max8997_charger_ops = {
870 .is_enabled = max8997_reg_is_enabled,
871 .enable = max8997_reg_enable,
872 .disable = max8997_reg_disable,
9e96b3a7
AL		 873 .get_current_limit = max8997_get_current_limit,
874 .set_current_limit = max8997_set_current_limit,
bd6ca2cf
MH		 875};
876
877static struct regulator_ops max8997_charger_fixedstate_ops = {
9e96b3a7
AL		 878 .get_current_limit = max8997_get_current_limit,
879 .set_current_limit = max8997_set_current_limit,
bd6ca2cf
MH		 880};
881
4533f80e
AL		 882#define MAX8997_VOLTAGE_REGULATOR(_name, _ops) {\
883 .name = #_name, \
884 .id = MAX8997_##_name, \
885 .ops = &_ops, \
bd6ca2cf
MH		 886 .type = REGULATOR_VOLTAGE, \
887 .owner = THIS_MODULE, \
888}
4533f80e
AL		 889
890#define MAX8997_CURRENT_REGULATOR(_name, _ops) {\
891 .name = #_name, \
892 .id = MAX8997_##_name, \
893 .ops = &_ops, \
894 .type = REGULATOR_CURRENT, \
bd6ca2cf
MH		 895 .owner = THIS_MODULE, \
896}
897
898static struct regulator_desc regulators[] = {
4533f80e
AL		 899 MAX8997_VOLTAGE_REGULATOR(LDO1, max8997_ldo_ops),
900 MAX8997_VOLTAGE_REGULATOR(LDO2, max8997_ldo_ops),
901 MAX8997_VOLTAGE_REGULATOR(LDO3, max8997_ldo_ops),
902 MAX8997_VOLTAGE_REGULATOR(LDO4, max8997_ldo_ops),
903 MAX8997_VOLTAGE_REGULATOR(LDO5, max8997_ldo_ops),
904 MAX8997_VOLTAGE_REGULATOR(LDO6, max8997_ldo_ops),
905 MAX8997_VOLTAGE_REGULATOR(LDO7, max8997_ldo_ops),
906 MAX8997_VOLTAGE_REGULATOR(LDO8, max8997_ldo_ops),
907 MAX8997_VOLTAGE_REGULATOR(LDO9, max8997_ldo_ops),
908 MAX8997_VOLTAGE_REGULATOR(LDO10, max8997_ldo_ops),
909 MAX8997_VOLTAGE_REGULATOR(LDO11, max8997_ldo_ops),
910 MAX8997_VOLTAGE_REGULATOR(LDO12, max8997_ldo_ops),
911 MAX8997_VOLTAGE_REGULATOR(LDO13, max8997_ldo_ops),
912 MAX8997_VOLTAGE_REGULATOR(LDO14, max8997_ldo_ops),
913 MAX8997_VOLTAGE_REGULATOR(LDO15, max8997_ldo_ops),
914 MAX8997_VOLTAGE_REGULATOR(LDO16, max8997_ldo_ops),
915 MAX8997_VOLTAGE_REGULATOR(LDO17, max8997_ldo_ops),
916 MAX8997_VOLTAGE_REGULATOR(LDO18, max8997_ldo_ops),
917 MAX8997_VOLTAGE_REGULATOR(LDO21, max8997_ldo_ops),
918 MAX8997_VOLTAGE_REGULATOR(BUCK1, max8997_buck_ops),
919 MAX8997_VOLTAGE_REGULATOR(BUCK2, max8997_buck_ops),
920 MAX8997_VOLTAGE_REGULATOR(BUCK3, max8997_buck_ops),
921 MAX8997_VOLTAGE_REGULATOR(BUCK4, max8997_buck_ops),
922 MAX8997_VOLTAGE_REGULATOR(BUCK5, max8997_buck_ops),
923 MAX8997_VOLTAGE_REGULATOR(BUCK6, max8997_fixedvolt_ops),
924 MAX8997_VOLTAGE_REGULATOR(BUCK7, max8997_buck_ops),
925 MAX8997_VOLTAGE_REGULATOR(EN32KHZ_AP, max8997_fixedvolt_ops),
926 MAX8997_VOLTAGE_REGULATOR(EN32KHZ_CP, max8997_fixedvolt_ops),
927 MAX8997_VOLTAGE_REGULATOR(ENVICHG, max8997_fixedvolt_ops),
928 MAX8997_VOLTAGE_REGULATOR(ESAFEOUT1, max8997_safeout_ops),
929 MAX8997_VOLTAGE_REGULATOR(ESAFEOUT2, max8997_safeout_ops),
930 MAX8997_VOLTAGE_REGULATOR(CHARGER_CV, max8997_fixedstate_ops),
931 MAX8997_CURRENT_REGULATOR(CHARGER, max8997_charger_ops),
932 MAX8997_CURRENT_REGULATOR(CHARGER_TOPOFF,
933 max8997_charger_fixedstate_ops),
bd6ca2cf
MH		 934};
935
77b71b37 936#ifdef CONFIG_OF
b4895e2c 937static int max8997_pmic_dt_parse_dvs_gpio(struct platform_device *pdev,
77b71b37
TA		 938 struct max8997_platform_data *pdata,
939 struct device_node *pmic_np)
940{
941 int i, gpio;
942
943 for (i = 0; i < 3; i++) {
944 gpio = of_get_named_gpio(pmic_np,
945 "max8997,pmic-buck125-dvs-gpios", i);
946 if (!gpio_is_valid(gpio)) {
b4895e2c 947 dev_err(&pdev->dev, "invalid gpio[%d]: %d\n", i, gpio);
77b71b37
TA		 948 return -EINVAL;
949 }
950 pdata->buck125_gpios[i] = gpio;
951 }
952 return 0;
953}
954
b4895e2c 955static int max8997_pmic_dt_parse_pdata(struct platform_device *pdev,
77b71b37
TA		 956 struct max8997_platform_data *pdata)
957{
b4895e2c 958 struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent);
77b71b37
TA		 959 struct device_node *pmic_np, *regulators_np, *reg_np;
960 struct max8997_regulator_data *rdata;
961 unsigned int i, dvs_voltage_nr = 1, ret;
962
c92f5dd2 963 pmic_np = of_node_get(iodev->dev->of_node);
77b71b37 964 if (!pmic_np) {
b4895e2c 965 dev_err(&pdev->dev, "could not find pmic sub-node\n");
77b71b37
TA		 966 return -ENODEV;
967 }
968
969 regulators_np = of_find_node_by_name(pmic_np, "regulators");
970 if (!regulators_np) {
b4895e2c 971 dev_err(&pdev->dev, "could not find regulators sub-node\n");
77b71b37
TA		 972 return -EINVAL;
973 }
974
975 /* count the number of regulators to be supported in pmic */
976 pdata->num_regulators = 0;
977 for_each_child_of_node(regulators_np, reg_np)
978 pdata->num_regulators++;
979
b4895e2c 980 rdata = devm_kzalloc(&pdev->dev, sizeof(*rdata) *
77b71b37
TA		 981 pdata->num_regulators, GFP_KERNEL);
982 if (!rdata) {
c92f5dd2 983 of_node_put(regulators_np);
b4895e2c 984 dev_err(&pdev->dev, "could not allocate memory for regulator data\n");
77b71b37
TA		 985 return -ENOMEM;
986 }
987
988 pdata->regulators = rdata;
989 for_each_child_of_node(regulators_np, reg_np) {
990 for (i = 0; i < ARRAY_SIZE(regulators); i++)
991 if (!of_node_cmp(reg_np->name, regulators[i].name))
992 break;
993
994 if (i == ARRAY_SIZE(regulators)) {
b4895e2c
AL		 995 dev_warn(&pdev->dev, "don't know how to configure regulator %s\n",
996 reg_np->name);
77b71b37
TA		 997 continue;
998 }
999
1000 rdata->id = i;
b4895e2c
AL		 1001 rdata->initdata = of_get_regulator_init_data(&pdev->dev,
1002 reg_np);
77b71b37
TA		 1003 rdata->reg_node = reg_np;
1004 rdata++;
1005 }
c92f5dd2 1006 of_node_put(regulators_np);
77b71b37
TA		 1007
1008 if (of_get_property(pmic_np, "max8997,pmic-buck1-uses-gpio-dvs", NULL))
1009 pdata->buck1_gpiodvs = true;
1010
1011 if (of_get_property(pmic_np, "max8997,pmic-buck2-uses-gpio-dvs", NULL))
1012 pdata->buck2_gpiodvs = true;
1013
1014 if (of_get_property(pmic_np, "max8997,pmic-buck5-uses-gpio-dvs", NULL))
1015 pdata->buck5_gpiodvs = true;
1016
1017 if (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs ||
1018 pdata->buck5_gpiodvs) {
b4895e2c 1019 ret = max8997_pmic_dt_parse_dvs_gpio(pdev, pdata, pmic_np);
77b71b37
TA		 1020 if (ret)
1021 return -EINVAL;
1022
1023 if (of_property_read_u32(pmic_np,
1024 "max8997,pmic-buck125-default-dvs-idx",
1025 &pdata->buck125_default_idx)) {
1026 pdata->buck125_default_idx = 0;
1027 } else {
1028 if (pdata->buck125_default_idx >= 8) {
1029 pdata->buck125_default_idx = 0;
b4895e2c 1030 dev_info(&pdev->dev, "invalid value for default dvs index, using 0 instead\n");
77b71b37
TA		 1031 }
1032 }
1033
1034 if (of_get_property(pmic_np,
1035 "max8997,pmic-ignore-gpiodvs-side-effect", NULL))
1036 pdata->ignore_gpiodvs_side_effect = true;
1037
1038 dvs_voltage_nr = 8;
1039 }
1040
1041 if (of_property_read_u32_array(pmic_np,
1042 "max8997,pmic-buck1-dvs-voltage",
1043 pdata->buck1_voltage, dvs_voltage_nr)) {
b4895e2c 1044 dev_err(&pdev->dev, "buck1 voltages not specified\n");
77b71b37
TA		 1045 return -EINVAL;
1046 }
1047
1048 if (of_property_read_u32_array(pmic_np,
1049 "max8997,pmic-buck2-dvs-voltage",
1050 pdata->buck2_voltage, dvs_voltage_nr)) {
b4895e2c 1051 dev_err(&pdev->dev, "buck2 voltages not specified\n");
77b71b37
TA		 1052 return -EINVAL;
1053 }
1054
1055 if (of_property_read_u32_array(pmic_np,
1056 "max8997,pmic-buck5-dvs-voltage",
1057 pdata->buck5_voltage, dvs_voltage_nr)) {
b4895e2c 1058 dev_err(&pdev->dev, "buck5 voltages not specified\n");
77b71b37
TA		 1059 return -EINVAL;
1060 }
1061
1062 return 0;
1063}
1064#else
b4895e2c 1065static int max8997_pmic_dt_parse_pdata(struct platform_device *pdev,
77b71b37
TA		 1066 struct max8997_platform_data *pdata)
1067{
1068 return 0;
1069}
1070#endif /* CONFIG_OF */
1071
a5023574 1072static int max8997_pmic_probe(struct platform_device *pdev)
bd6ca2cf
MH		 1073{
1074 struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent);
77b71b37 1075 struct max8997_platform_data *pdata = iodev->pdata;
c172708d 1076 struct regulator_config config = { };
bd6ca2cf
MH		 1077 struct regulator_dev **rdev;
1078 struct max8997_data *max8997;
1079 struct i2c_client *i2c;
068a8c82 1080 int i, ret, size, nr_dvs;
bd6ca2cf
MH		 1081 u8 max_buck1 = 0, max_buck2 = 0, max_buck5 = 0;
1082
77b71b37 1083 if (IS_ERR_OR_NULL(pdata)) {
bd6ca2cf
MH		 1084 dev_err(pdev->dev.parent, "No platform init data supplied.\n");
1085 return -ENODEV;
1086 }
1087
77b71b37 1088 if (iodev->dev->of_node) {
b4895e2c 1089 ret = max8997_pmic_dt_parse_pdata(pdev, pdata);
77b71b37
TA		 1090 if (ret)
1091 return ret;
1092 }
1093
8ae5767b
AL		 1094 max8997 = devm_kzalloc(&pdev->dev, sizeof(struct max8997_data),
1095 GFP_KERNEL);
bd6ca2cf
MH		 1096 if (!max8997)
1097 return -ENOMEM;
1098
1099 size = sizeof(struct regulator_dev *) * pdata->num_regulators;
8ae5767b
AL		 1100 max8997->rdev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
1101 if (!max8997->rdev)
bd6ca2cf 1102 return -ENOMEM;
bd6ca2cf
MH		 1103
1104 rdev = max8997->rdev;
1105 max8997->dev = &pdev->dev;
1106 max8997->iodev = iodev;
1107 max8997->num_regulators = pdata->num_regulators;
1108 platform_set_drvdata(pdev, max8997);
1109 i2c = max8997->iodev->i2c;
1110
1111 max8997->buck125_gpioindex = pdata->buck125_default_idx;
6e0414a5
MH		 1112 max8997->buck1_gpiodvs = pdata->buck1_gpiodvs;
1113 max8997->buck2_gpiodvs = pdata->buck2_gpiodvs;
1114 max8997->buck5_gpiodvs = pdata->buck5_gpiodvs;
1115 memcpy(max8997->buck125_gpios, pdata->buck125_gpios, sizeof(int) * 3);
1116 max8997->ignore_gpiodvs_side_effect = pdata->ignore_gpiodvs_side_effect;
bd6ca2cf 1117
068a8c82
TA		 1118 nr_dvs = (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs ||
1119 pdata->buck5_gpiodvs) ? 8 : 1;
1120
1121 for (i = 0; i < nr_dvs; i++) {
bd6ca2cf
MH		 1122 max8997->buck1_vol[i] = ret =
1123 max8997_get_voltage_proper_val(
1124 &buck1245_voltage_map_desc,
bc3b7756
AL		 1125 pdata->buck1_voltage[i],
1126 pdata->buck1_voltage[i] +
bd6ca2cf
MH		 1127 buck1245_voltage_map_desc.step);
1128 if (ret < 0)
8ae5767b 1129 goto err_out;
bd6ca2cf
MH		 1130
1131 max8997->buck2_vol[i] = ret =
1132 max8997_get_voltage_proper_val(
1133 &buck1245_voltage_map_desc,
bc3b7756
AL		 1134 pdata->buck2_voltage[i],
1135 pdata->buck2_voltage[i] +
bd6ca2cf
MH		 1136 buck1245_voltage_map_desc.step);
1137 if (ret < 0)
8ae5767b 1138 goto err_out;
bd6ca2cf
MH		 1139
1140 max8997->buck5_vol[i] = ret =
1141 max8997_get_voltage_proper_val(
1142 &buck1245_voltage_map_desc,
bc3b7756
AL		 1143 pdata->buck5_voltage[i],
1144 pdata->buck5_voltage[i] +
bd6ca2cf
MH		 1145 buck1245_voltage_map_desc.step);
1146 if (ret < 0)
8ae5767b 1147 goto err_out;
bd6ca2cf
MH		 1148
1149 if (max_buck1 < max8997->buck1_vol[i])
1150 max_buck1 = max8997->buck1_vol[i];
1151 if (max_buck2 < max8997->buck2_vol[i])
1152 max_buck2 = max8997->buck2_vol[i];
1153 if (max_buck5 < max8997->buck5_vol[i])
1154 max_buck5 = max8997->buck5_vol[i];
1155 }
1156
1157 /* For the safety, set max voltage before setting up */
1158 for (i = 0; i < 8; i++) {
ecb9c4f5 1159 max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i,
bd6ca2cf 1160 max_buck1, 0x3f);
ecb9c4f5 1161 max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i,
bd6ca2cf 1162 max_buck2, 0x3f);
ecb9c4f5 1163 max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i,
bd6ca2cf
MH		 1164 max_buck5, 0x3f);
1165 }
1166
11ec7bf0 1167 /* Initialize all the DVS related BUCK registers */
068a8c82 1168 for (i = 0; i < nr_dvs; i++) {
11ec7bf0
TA		 1169 max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i,
1170 max8997->buck1_vol[i],
1171 0x3f);
1172 max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i,
1173 max8997->buck2_vol[i],
1174 0x3f);
1175 max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i,
1176 max8997->buck5_vol[i],
1177 0x3f);
1178 }
1179
bd6ca2cf
MH		 1180 /*
1181 * If buck 1, 2, and 5 do not care DVS GPIO settings, ignore them.
1182 * If at least one of them cares, set gpios.
1183 */
1184 if (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs ||
1185 pdata->buck5_gpiodvs) {
bd6ca2cf
MH		 1186
1187 if (!gpio_is_valid(pdata->buck125_gpios[0]) ||
1188 !gpio_is_valid(pdata->buck125_gpios[1]) ||
1189 !gpio_is_valid(pdata->buck125_gpios[2])) {
1190 dev_err(&pdev->dev, "GPIO NOT VALID\n");
1191 ret = -EINVAL;
8ae5767b 1192 goto err_out;
bd6ca2cf
MH		 1193 }
1194
8fa25eda
AL		 1195 ret = devm_gpio_request(&pdev->dev, pdata->buck125_gpios[0],
1196 "MAX8997 SET1");
1197 if (ret)
8ae5767b 1198 goto err_out;
8fa25eda
AL		 1199
1200 ret = devm_gpio_request(&pdev->dev, pdata->buck125_gpios[1],
1201 "MAX8997 SET2");
1202 if (ret)
8ae5767b 1203 goto err_out;
bd6ca2cf 1204
8fa25eda 1205 ret = devm_gpio_request(&pdev->dev, pdata->buck125_gpios[2],
bd6ca2cf 1206 "MAX8997 SET3");
8fa25eda 1207 if (ret)
8ae5767b 1208 goto err_out;
bd6ca2cf
MH		 1209
1210 gpio_direction_output(pdata->buck125_gpios[0],
1211 (max8997->buck125_gpioindex >> 2)
1212 & 0x1); /* SET1 */
1213 gpio_direction_output(pdata->buck125_gpios[1],
1214 (max8997->buck125_gpioindex >> 1)
1215 & 0x1); /* SET2 */
1216 gpio_direction_output(pdata->buck125_gpios[2],
1217 (max8997->buck125_gpioindex >> 0)
1218 & 0x1); /* SET3 */
bd6ca2cf
MH		 1219 }
1220
1221 /* DVS-GPIO disabled */
1222 max8997_update_reg(i2c, MAX8997_REG_BUCK1CTRL, (pdata->buck1_gpiodvs) ?
1223 (1 << 1) : (0 << 1), 1 << 1);
1224 max8997_update_reg(i2c, MAX8997_REG_BUCK2CTRL, (pdata->buck2_gpiodvs) ?
1225 (1 << 1) : (0 << 1), 1 << 1);
1226 max8997_update_reg(i2c, MAX8997_REG_BUCK5CTRL, (pdata->buck5_gpiodvs) ?
1227 (1 << 1) : (0 << 1), 1 << 1);
1228
dbb48e7c
TB		 1229 /* Misc Settings */
1230 max8997->ramp_delay = 10; /* set 10mV/us, which is the default */
1231 max8997_write_reg(i2c, MAX8997_REG_BUCKRAMP, (0xf << 4) | 0x9);
1232
bd6ca2cf
MH		 1233 for (i = 0; i < pdata->num_regulators; i++) {
1234 const struct voltage_map_desc *desc;
1235 int id = pdata->regulators[i].id;
1236
1237 desc = reg_voltage_map[id];
1238 if (desc)
1239 regulators[id].n_voltages =
1240 (desc->max - desc->min) / desc->step + 1;
1241 else if (id == MAX8997_ESAFEOUT1 || id == MAX8997_ESAFEOUT2)
1242 regulators[id].n_voltages = 4;
1243 else if (id == MAX8997_CHARGER_CV)
1244 regulators[id].n_voltages = 16;
1245
c172708d
MB		 1246 config.dev = max8997->dev;
1247 config.init_data = pdata->regulators[i].initdata;
1248 config.driver_data = max8997;
77b71b37 1249 config.of_node = pdata->regulators[i].reg_node;
c172708d
MB		 1250
1251 rdev[i] = regulator_register(&regulators[id], &config);
bd6ca2cf
MH		 1252 if (IS_ERR(rdev[i])) {
1253 ret = PTR_ERR(rdev[i]);
1254 dev_err(max8997->dev, "regulator init failed for %d\n",
1255 id);
1256 rdev[i] = NULL;
1257 goto err;
1258 }
1259 }
1260
bd6ca2cf
MH		 1261 return 0;
1262err:
8ae5767b
AL		 1263 while (--i >= 0)
1264 regulator_unregister(rdev[i]);
1265err_out:
bd6ca2cf
MH		 1266 return ret;
1267}
1268
8dc995f5 1269static int max8997_pmic_remove(struct platform_device *pdev)
bd6ca2cf
MH		 1270{
1271 struct max8997_data *max8997 = platform_get_drvdata(pdev);
1272 struct regulator_dev **rdev = max8997->rdev;
1273 int i;
1274
1275 for (i = 0; i < max8997->num_regulators; i++)
8ae5767b 1276 regulator_unregister(rdev[i]);
bd6ca2cf
MH		 1277 return 0;
1278}
1279
1280static const struct platform_device_id max8997_pmic_id[] = {
1281 { "max8997-pmic", 0},
1282 { },
1283};
a51b907b 1284MODULE_DEVICE_TABLE(platform, max8997_pmic_id);
bd6ca2cf
MH		 1285
1286static struct platform_driver max8997_pmic_driver = {
1287 .driver = {
1288 .name = "max8997-pmic",
1289 .owner = THIS_MODULE,
1290 },
1291 .probe = max8997_pmic_probe,
5eb9f2b9 1292 .remove = max8997_pmic_remove,
bd6ca2cf
MH		 1293 .id_table = max8997_pmic_id,
1294};
1295
1296static int __init max8997_pmic_init(void)
1297{
1298 return platform_driver_register(&max8997_pmic_driver);
1299}
1300subsys_initcall(max8997_pmic_init);
1301
1302static void __exit max8997_pmic_cleanup(void)
1303{
1304 platform_driver_unregister(&max8997_pmic_driver);
1305}
1306module_exit(max8997_pmic_cleanup);
1307
1308MODULE_DESCRIPTION("MAXIM 8997/8966 Regulator Driver");
1309MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
1310MODULE_LICENSE("GPL");
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