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Merge branch 'regulator-register' into regulator-drivers
[mirror_ubuntu-jammy-kernel.git] / drivers / regulator / max8997.c
CommitLineData
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>
25#include <linux/delay.h>
26#include <linux/err.h>
27#include <linux/gpio.h>
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>
35
36struct max8997_data {
37 struct device *dev;
38 struct max8997_dev *iodev;
39 int num_regulators;
40 struct regulator_dev **rdev;
41 int ramp_delay; /* in mV/us */
42
6e0414a5
MH		 43 bool buck1_gpiodvs;
44 bool buck2_gpiodvs;
45 bool buck5_gpiodvs;
bd6ca2cf
MH		 46 u8 buck1_vol[8];
47 u8 buck2_vol[8];
48 u8 buck5_vol[8];
6e0414a5 49 int buck125_gpios[3];
bd6ca2cf 50 int buck125_gpioindex;
6e0414a5 51 bool ignore_gpiodvs_side_effect;
bd6ca2cf
MH		 52
53 u8 saved_states[MAX8997_REG_MAX];
54};
55
56static inline void max8997_set_gpio(struct max8997_data *max8997)
57{
bd6ca2cf
MH		 58 int set3 = (max8997->buck125_gpioindex) & 0x1;
59 int set2 = ((max8997->buck125_gpioindex) >> 1) & 0x1;
60 int set1 = ((max8997->buck125_gpioindex) >> 2) & 0x1;
61
6e0414a5
MH		 62 gpio_set_value(max8997->buck125_gpios[0], set1);
63 gpio_set_value(max8997->buck125_gpios[1], set2);
64 gpio_set_value(max8997->buck125_gpios[2], set3);
bd6ca2cf
MH		 65}
66
67struct voltage_map_desc {
68 int min;
69 int max;
70 int step;
71 unsigned int n_bits;
72};
73
74/* Voltage maps in mV */
75static const struct voltage_map_desc ldo_voltage_map_desc = {
76 .min = 800, .max = 3950, .step = 50, .n_bits = 6,
77}; /* LDO1 ~ 18, 21 all */
78
79static const struct voltage_map_desc buck1245_voltage_map_desc = {
80 .min = 650, .max = 2225, .step = 25, .n_bits = 6,
81}; /* Buck1, 2, 4, 5 */
82
83static const struct voltage_map_desc buck37_voltage_map_desc = {
84 .min = 750, .max = 3900, .step = 50, .n_bits = 6,
85}; /* Buck3, 7 */
86
87/* current map in mA */
88static const struct voltage_map_desc charger_current_map_desc = {
89 .min = 200, .max = 950, .step = 50, .n_bits = 4,
90};
91
92static const struct voltage_map_desc topoff_current_map_desc = {
93 .min = 50, .max = 200, .step = 10, .n_bits = 4,
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
197 return val * 1000;
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);
282 if (ret == -EINVAL)
283 return 1; /* "not controllable" */
284 else if (ret)
285 return ret;
286
287 ret = max8997_read_reg(i2c, reg, &val);
288 if (ret)
289 return ret;
290
291 return (val & mask) == pattern;
292}
293
294static int max8997_reg_enable(struct regulator_dev *rdev)
295{
296 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
297 struct i2c_client *i2c = max8997->iodev->i2c;
298 int ret, reg, mask, pattern;
299
300 ret = max8997_get_enable_register(rdev, &reg, &mask, &pattern);
301 if (ret)
302 return ret;
303
304 return max8997_update_reg(i2c, reg, pattern, mask);
305}
306
307static int max8997_reg_disable(struct regulator_dev *rdev)
308{
309 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
310 struct i2c_client *i2c = max8997->iodev->i2c;
311 int ret, reg, mask, pattern;
312
313 ret = max8997_get_enable_register(rdev, &reg, &mask, &pattern);
314 if (ret)
315 return ret;
316
317 return max8997_update_reg(i2c, reg, ~pattern, mask);
318}
319
320static int max8997_get_voltage_register(struct regulator_dev *rdev,
321 int *_reg, int *_shift, int *_mask)
322{
6f43c380 323 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
b3e1348e 324 int rid = rdev_get_id(rdev);
bd6ca2cf
MH		 325 int reg, shift = 0, mask = 0x3f;
326
327 switch (rid) {
328 case MAX8997_LDO1 ... MAX8997_LDO21:
329 reg = MAX8997_REG_LDO1CTRL + (rid - MAX8997_LDO1);
330 break;
331 case MAX8997_BUCK1:
332 reg = MAX8997_REG_BUCK1DVS1;
6f43c380
AL		 333 if (max8997->buck1_gpiodvs)
334 reg += max8997->buck125_gpioindex;
bd6ca2cf
MH		 335 break;
336 case MAX8997_BUCK2:
337 reg = MAX8997_REG_BUCK2DVS1;
6f43c380
AL		 338 if (max8997->buck2_gpiodvs)
339 reg += max8997->buck125_gpioindex;
bd6ca2cf
MH		 340 break;
341 case MAX8997_BUCK3:
342 reg = MAX8997_REG_BUCK3DVS;
343 break;
344 case MAX8997_BUCK4:
345 reg = MAX8997_REG_BUCK4DVS;
346 break;
347 case MAX8997_BUCK5:
348 reg = MAX8997_REG_BUCK5DVS1;
6f43c380
AL		 349 if (max8997->buck5_gpiodvs)
350 reg += max8997->buck125_gpioindex;
bd6ca2cf
MH		 351 break;
352 case MAX8997_BUCK7:
353 reg = MAX8997_REG_BUCK7DVS;
354 break;
355 case MAX8997_ESAFEOUT1 ... MAX8997_ESAFEOUT2:
356 reg = MAX8997_REG_SAFEOUTCTRL;
357 shift = (rid == MAX8997_ESAFEOUT2) ? 2 : 0;
358 mask = 0x3;
359 break;
360 case MAX8997_CHARGER_CV:
361 reg = MAX8997_REG_MBCCTRL3;
362 shift = 0;
363 mask = 0xf;
364 break;
365 case MAX8997_CHARGER:
366 reg = MAX8997_REG_MBCCTRL4;
367 shift = 0;
368 mask = 0xf;
369 break;
370 case MAX8997_CHARGER_TOPOFF:
371 reg = MAX8997_REG_MBCCTRL5;
372 shift = 0;
373 mask = 0xf;
374 break;
375 default:
376 return -EINVAL;
377 }
378
379 *_reg = reg;
380 *_shift = shift;
381 *_mask = mask;
382
383 return 0;
384}
385
386static int max8997_get_voltage(struct regulator_dev *rdev)
387{
388 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
bd6ca2cf
MH		 389 struct i2c_client *i2c = max8997->iodev->i2c;
390 int reg, shift, mask, ret;
bd6ca2cf
MH		 391 u8 val;
392
393 ret = max8997_get_voltage_register(rdev, &reg, &shift, &mask);
394 if (ret)
395 return ret;
396
bd6ca2cf
MH		 397 ret = max8997_read_reg(i2c, reg, &val);
398 if (ret)
399 return ret;
400
401 val >>= shift;
402 val &= mask;
403
404 if (rdev->desc && rdev->desc->ops && rdev->desc->ops->list_voltage)
405 return rdev->desc->ops->list_voltage(rdev, val);
406
407 /*
408 * max8997_list_voltage returns value for any rdev with voltage_map,
409 * which works for "CHARGER" and "CHARGER TOPOFF" that do not have
410 * list_voltage ops (they are current regulators).
411 */
412 return max8997_list_voltage(rdev, val);
413}
414
415static inline int max8997_get_voltage_proper_val(
416 const struct voltage_map_desc *desc,
417 int min_vol, int max_vol)
418{
419 int i = 0;
420
421 if (desc == NULL)
422 return -EINVAL;
423
424 if (max_vol < desc->min || min_vol > desc->max)
425 return -EINVAL;
426
427 while (desc->min + desc->step * i < min_vol &&
428 desc->min + desc->step * i < desc->max)
429 i++;
430
431 if (desc->min + desc->step * i > max_vol)
432 return -EINVAL;
433
434 if (i >= (1 << desc->n_bits))
435 return -EINVAL;
436
437 return i;
438}
439
440static int max8997_set_voltage_charger_cv(struct regulator_dev *rdev,
441 int min_uV, int max_uV, unsigned *selector)
442{
443 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
444 struct i2c_client *i2c = max8997->iodev->i2c;
b3e1348e 445 int rid = rdev_get_id(rdev);
bd6ca2cf
MH		 446 int lb, ub;
447 int reg, shift = 0, mask, ret = 0;
448 u8 val = 0x0;
449
450 if (rid != MAX8997_CHARGER_CV)
451 return -EINVAL;
452
453 ret = max8997_get_voltage_register(rdev, &reg, &shift, &mask);
454 if (ret)
455 return ret;
456
457 if (max_uV < 4000000 || min_uV > 4350000)
458 return -EINVAL;
459
460 if (min_uV <= 4000000) {
461 if (max_uV >= 4000000)
462 return -EINVAL;
463 else
464 val = 0x1;
465 } else if (min_uV <= 4200000 && max_uV >= 4200000)
466 val = 0x0;
467 else {
468 lb = (min_uV - 4000001) / 20000 + 2;
469 ub = (max_uV - 4000000) / 20000 + 1;
470
471 if (lb > ub)
472 return -EINVAL;
473
474 if (lb < 0xf)
475 val = lb;
476 else {
477 if (ub >= 0xf)
478 val = 0xf;
479 else
480 return -EINVAL;
481 }
482 }
483
484 *selector = val;
485
486 ret = max8997_update_reg(i2c, reg, val << shift, mask);
487
488 return ret;
489}
490
491/*
492 * For LDO1 ~ LDO21, BUCK1~5, BUCK7, CHARGER, CHARGER_TOPOFF
493 * BUCK1, 2, and 5 are available if they are not controlled by gpio
494 */
495static int max8997_set_voltage_ldobuck(struct regulator_dev *rdev,
496 int min_uV, int max_uV, unsigned *selector)
497{
498 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
499 struct i2c_client *i2c = max8997->iodev->i2c;
500 int min_vol = min_uV / 1000, max_vol = max_uV / 1000;
501 const struct voltage_map_desc *desc;
b3e1348e 502 int rid = rdev_get_id(rdev);
bd6ca2cf
MH		 503 int reg, shift = 0, mask, ret;
504 int i;
505 u8 org;
506
507 switch (rid) {
508 case MAX8997_LDO1 ... MAX8997_LDO21:
509 break;
510 case MAX8997_BUCK1 ... MAX8997_BUCK5:
511 break;
512 case MAX8997_BUCK6:
513 return -EINVAL;
514 case MAX8997_BUCK7:
515 break;
516 case MAX8997_CHARGER:
517 break;
518 case MAX8997_CHARGER_TOPOFF:
519 break;
520 default:
521 return -EINVAL;
522 }
523
524 desc = reg_voltage_map[rid];
525
526 i = max8997_get_voltage_proper_val(desc, min_vol, max_vol);
527 if (i < 0)
528 return i;
529
530 ret = max8997_get_voltage_register(rdev, &reg, &shift, &mask);
531 if (ret)
532 return ret;
533
534 max8997_read_reg(i2c, reg, &org);
535 org = (org & mask) >> shift;
536
537 ret = max8997_update_reg(i2c, reg, i << shift, mask << shift);
538 *selector = i;
539
540 if (rid == MAX8997_BUCK1 || rid == MAX8997_BUCK2 ||
541 rid == MAX8997_BUCK4 || rid == MAX8997_BUCK5) {
542 /* If the voltage is increasing */
543 if (org < i)
6ff325a2
DK		 544 udelay(DIV_ROUND_UP(desc->step * (i - org),
545 max8997->ramp_delay));
bd6ca2cf
MH		 546 }
547
548 return ret;
549}
550
551/*
552 * Assess the damage on the voltage setting of BUCK1,2,5 by the change.
553 *
554 * When GPIO-DVS mode is used for multiple bucks, changing the voltage value
555 * of one of the bucks may affect that of another buck, which is the side
556 * effect of the change (set_voltage). This function examines the GPIO-DVS
557 * configurations and checks whether such side-effect exists.
558 */
559static int max8997_assess_side_effect(struct regulator_dev *rdev,
560 u8 new_val, int *best)
561{
562 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
b3e1348e 563 int rid = rdev_get_id(rdev);
bd6ca2cf
MH		 564 u8 *buckx_val[3];
565 bool buckx_gpiodvs[3];
566 int side_effect[8];
567 int min_side_effect = INT_MAX;
568 int i;
569
570 *best = -1;
571
572 switch (rid) {
573 case MAX8997_BUCK1:
574 rid = 0;
575 break;
576 case MAX8997_BUCK2:
577 rid = 1;
578 break;
579 case MAX8997_BUCK5:
580 rid = 2;
581 break;
582 default:
583 return -EINVAL;
584 }
585
586 buckx_val[0] = max8997->buck1_vol;
587 buckx_val[1] = max8997->buck2_vol;
588 buckx_val[2] = max8997->buck5_vol;
6e0414a5
MH		 589 buckx_gpiodvs[0] = max8997->buck1_gpiodvs;
590 buckx_gpiodvs[1] = max8997->buck2_gpiodvs;
591 buckx_gpiodvs[2] = max8997->buck5_gpiodvs;
bd6ca2cf
MH		 592
593 for (i = 0; i < 8; i++) {
594 int others;
595
596 if (new_val != (buckx_val[rid])[i]) {
597 side_effect[i] = -1;
598 continue;
599 }
600
601 side_effect[i] = 0;
602 for (others = 0; others < 3; others++) {
603 int diff;
604
605 if (others == rid)
606 continue;
607 if (buckx_gpiodvs[others] == false)
608 continue; /* Not affected */
609 diff = (buckx_val[others])[i] -
610 (buckx_val[others])[max8997->buck125_gpioindex];
611 if (diff > 0)
612 side_effect[i] += diff;
613 else if (diff < 0)
614 side_effect[i] -= diff;
615 }
616 if (side_effect[i] == 0) {
617 *best = i;
618 return 0; /* NO SIDE EFFECT! Use This! */
619 }
620 if (side_effect[i] < min_side_effect) {
621 min_side_effect = side_effect[i];
622 *best = i;
623 }
624 }
625
626 if (*best == -1)
627 return -EINVAL;
628
629 return side_effect[*best];
630}
631
632/*
633 * For Buck 1 ~ 5 and 7. If it is not controlled by GPIO, this calls
634 * max8997_set_voltage_ldobuck to do the job.
635 */
636static int max8997_set_voltage_buck(struct regulator_dev *rdev,
637 int min_uV, int max_uV, unsigned *selector)
638{
639 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
b3e1348e 640 int rid = rdev_get_id(rdev);
bd6ca2cf
MH		 641 const struct voltage_map_desc *desc;
642 int new_val, new_idx, damage, tmp_val, tmp_idx, tmp_dmg;
643 bool gpio_dvs_mode = false;
644 int min_vol = min_uV / 1000, max_vol = max_uV / 1000;
645
646 if (rid < MAX8997_BUCK1 || rid > MAX8997_BUCK7)
647 return -EINVAL;
648
649 switch (rid) {
650 case MAX8997_BUCK1:
6e0414a5 651 if (max8997->buck1_gpiodvs)
bd6ca2cf
MH		 652 gpio_dvs_mode = true;
653 break;
654 case MAX8997_BUCK2:
6e0414a5 655 if (max8997->buck2_gpiodvs)
bd6ca2cf
MH		 656 gpio_dvs_mode = true;
657 break;
658 case MAX8997_BUCK5:
6e0414a5 659 if (max8997->buck5_gpiodvs)
bd6ca2cf
MH		 660 gpio_dvs_mode = true;
661 break;
662 }
663
664 if (!gpio_dvs_mode)
665 return max8997_set_voltage_ldobuck(rdev, min_uV, max_uV,
666 selector);
667
668 desc = reg_voltage_map[rid];
669 new_val = max8997_get_voltage_proper_val(desc, min_vol, max_vol);
670 if (new_val < 0)
671 return new_val;
672
673 tmp_dmg = INT_MAX;
674 tmp_idx = -1;
675 tmp_val = -1;
676 do {
677 damage = max8997_assess_side_effect(rdev, new_val, &new_idx);
678 if (damage == 0)
679 goto out;
680
681 if (tmp_dmg > damage) {
682 tmp_idx = new_idx;
683 tmp_val = new_val;
684 tmp_dmg = damage;
685 }
686
687 new_val++;
688 } while (desc->min + desc->step + new_val <= desc->max);
689
690 new_idx = tmp_idx;
691 new_val = tmp_val;
692
6e0414a5 693 if (max8997->ignore_gpiodvs_side_effect == false)
bd6ca2cf
MH		 694 return -EINVAL;
695
696 dev_warn(&rdev->dev, "MAX8997 GPIO-DVS Side Effect Warning: GPIO SET:"
697 " %d -> %d\n", max8997->buck125_gpioindex, tmp_idx);
698
699out:
700 if (new_idx < 0 || new_val < 0)
701 return -EINVAL;
702
703 max8997->buck125_gpioindex = new_idx;
704 max8997_set_gpio(max8997);
705 *selector = new_val;
706
707 return 0;
708}
709
710static const int safeoutvolt[] = {
711 3300000,
712 4850000,
713 4900000,
714 4950000,
715};
716
717/* For SAFEOUT1 and SAFEOUT2 */
718static int max8997_set_voltage_safeout(struct regulator_dev *rdev,
719 int min_uV, int max_uV, unsigned *selector)
720{
721 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
722 struct i2c_client *i2c = max8997->iodev->i2c;
b3e1348e 723 int rid = rdev_get_id(rdev);
bd6ca2cf
MH		 724 int reg, shift = 0, mask, ret;
725 int i = 0;
726 u8 val;
727
728 if (rid != MAX8997_ESAFEOUT1 && rid != MAX8997_ESAFEOUT2)
729 return -EINVAL;
730
731 for (i = 0; i < ARRAY_SIZE(safeoutvolt); i++) {
732 if (min_uV <= safeoutvolt[i] &&
733 max_uV >= safeoutvolt[i])
734 break;
735 }
736
737 if (i >= ARRAY_SIZE(safeoutvolt))
738 return -EINVAL;
739
740 if (i == 0)
741 val = 0x3;
742 else
743 val = i - 1;
744
745 ret = max8997_get_voltage_register(rdev, &reg, &shift, &mask);
746 if (ret)
747 return ret;
748
749 ret = max8997_update_reg(i2c, reg, val << shift, mask << shift);
750 *selector = val;
751
752 return ret;
753}
754
755static int max8997_reg_enable_suspend(struct regulator_dev *rdev)
756{
757 return 0;
758}
759
760static int max8997_reg_disable_suspend(struct regulator_dev *rdev)
761{
762 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
763 struct i2c_client *i2c = max8997->iodev->i2c;
764 int ret, reg, mask, pattern;
b3e1348e 765 int rid = rdev_get_id(rdev);
bd6ca2cf
MH		 766
767 ret = max8997_get_enable_register(rdev, &reg, &mask, &pattern);
768 if (ret)
769 return ret;
770
771 max8997_read_reg(i2c, reg, &max8997->saved_states[rid]);
772
773 if (rid == MAX8997_LDO1 ||
774 rid == MAX8997_LDO10 ||
775 rid == MAX8997_LDO21) {
776 dev_dbg(&rdev->dev, "Conditional Power-Off for %s\n",
777 rdev->desc->name);
778 return max8997_update_reg(i2c, reg, 0x40, mask);
779 }
780
781 dev_dbg(&rdev->dev, "Full Power-Off for %s (%xh -> %xh)\n",
782 rdev->desc->name, max8997->saved_states[rid] & mask,
783 (~pattern) & mask);
784 return max8997_update_reg(i2c, reg, ~pattern, mask);
785}
786
787static struct regulator_ops max8997_ldo_ops = {
788 .list_voltage = max8997_list_voltage,
789 .is_enabled = max8997_reg_is_enabled,
790 .enable = max8997_reg_enable,
791 .disable = max8997_reg_disable,
792 .get_voltage = max8997_get_voltage,
793 .set_voltage = max8997_set_voltage_ldobuck,
794 .set_suspend_enable = max8997_reg_enable_suspend,
795 .set_suspend_disable = max8997_reg_disable_suspend,
796};
797
798static struct regulator_ops max8997_buck_ops = {
799 .list_voltage = max8997_list_voltage,
800 .is_enabled = max8997_reg_is_enabled,
801 .enable = max8997_reg_enable,
802 .disable = max8997_reg_disable,
803 .get_voltage = max8997_get_voltage,
804 .set_voltage = max8997_set_voltage_buck,
805 .set_suspend_enable = max8997_reg_enable_suspend,
806 .set_suspend_disable = max8997_reg_disable_suspend,
807};
808
809static struct regulator_ops max8997_fixedvolt_ops = {
810 .list_voltage = max8997_list_voltage,
811 .is_enabled = max8997_reg_is_enabled,
812 .enable = max8997_reg_enable,
813 .disable = max8997_reg_disable,
814 .set_suspend_enable = max8997_reg_enable_suspend,
815 .set_suspend_disable = max8997_reg_disable_suspend,
816};
817
818static struct regulator_ops max8997_safeout_ops = {
819 .list_voltage = max8997_list_voltage_safeout,
820 .is_enabled = max8997_reg_is_enabled,
821 .enable = max8997_reg_enable,
822 .disable = max8997_reg_disable,
823 .get_voltage = max8997_get_voltage,
824 .set_voltage = max8997_set_voltage_safeout,
825 .set_suspend_enable = max8997_reg_enable_suspend,
826 .set_suspend_disable = max8997_reg_disable_suspend,
827};
828
829static struct regulator_ops max8997_fixedstate_ops = {
830 .list_voltage = max8997_list_voltage_charger_cv,
831 .get_voltage = max8997_get_voltage,
832 .set_voltage = max8997_set_voltage_charger_cv,
833};
834
835static int max8997_set_voltage_ldobuck_wrap(struct regulator_dev *rdev,
836 int min_uV, int max_uV)
837{
838 unsigned dummy;
839
840 return max8997_set_voltage_ldobuck(rdev, min_uV, max_uV, &dummy);
841}
842
843
844static struct regulator_ops max8997_charger_ops = {
845 .is_enabled = max8997_reg_is_enabled,
846 .enable = max8997_reg_enable,
847 .disable = max8997_reg_disable,
848 .get_current_limit = max8997_get_voltage,
849 .set_current_limit = max8997_set_voltage_ldobuck_wrap,
850};
851
852static struct regulator_ops max8997_charger_fixedstate_ops = {
853 .is_enabled = max8997_reg_is_enabled,
854 .get_current_limit = max8997_get_voltage,
855 .set_current_limit = max8997_set_voltage_ldobuck_wrap,
856};
857
4533f80e
AL		 858#define MAX8997_VOLTAGE_REGULATOR(_name, _ops) {\
859 .name = #_name, \
860 .id = MAX8997_##_name, \
861 .ops = &_ops, \
bd6ca2cf
MH		 862 .type = REGULATOR_VOLTAGE, \
863 .owner = THIS_MODULE, \
864}
4533f80e
AL		 865
866#define MAX8997_CURRENT_REGULATOR(_name, _ops) {\
867 .name = #_name, \
868 .id = MAX8997_##_name, \
869 .ops = &_ops, \
870 .type = REGULATOR_CURRENT, \
bd6ca2cf
MH		 871 .owner = THIS_MODULE, \
872}
873
874static struct regulator_desc regulators[] = {
4533f80e
AL		 875 MAX8997_VOLTAGE_REGULATOR(LDO1, max8997_ldo_ops),
876 MAX8997_VOLTAGE_REGULATOR(LDO2, max8997_ldo_ops),
877 MAX8997_VOLTAGE_REGULATOR(LDO3, max8997_ldo_ops),
878 MAX8997_VOLTAGE_REGULATOR(LDO4, max8997_ldo_ops),
879 MAX8997_VOLTAGE_REGULATOR(LDO5, max8997_ldo_ops),
880 MAX8997_VOLTAGE_REGULATOR(LDO6, max8997_ldo_ops),
881 MAX8997_VOLTAGE_REGULATOR(LDO7, max8997_ldo_ops),
882 MAX8997_VOLTAGE_REGULATOR(LDO8, max8997_ldo_ops),
883 MAX8997_VOLTAGE_REGULATOR(LDO9, max8997_ldo_ops),
884 MAX8997_VOLTAGE_REGULATOR(LDO10, max8997_ldo_ops),
885 MAX8997_VOLTAGE_REGULATOR(LDO11, max8997_ldo_ops),
886 MAX8997_VOLTAGE_REGULATOR(LDO12, max8997_ldo_ops),
887 MAX8997_VOLTAGE_REGULATOR(LDO13, max8997_ldo_ops),
888 MAX8997_VOLTAGE_REGULATOR(LDO14, max8997_ldo_ops),
889 MAX8997_VOLTAGE_REGULATOR(LDO15, max8997_ldo_ops),
890 MAX8997_VOLTAGE_REGULATOR(LDO16, max8997_ldo_ops),
891 MAX8997_VOLTAGE_REGULATOR(LDO17, max8997_ldo_ops),
892 MAX8997_VOLTAGE_REGULATOR(LDO18, max8997_ldo_ops),
893 MAX8997_VOLTAGE_REGULATOR(LDO21, max8997_ldo_ops),
894 MAX8997_VOLTAGE_REGULATOR(BUCK1, max8997_buck_ops),
895 MAX8997_VOLTAGE_REGULATOR(BUCK2, max8997_buck_ops),
896 MAX8997_VOLTAGE_REGULATOR(BUCK3, max8997_buck_ops),
897 MAX8997_VOLTAGE_REGULATOR(BUCK4, max8997_buck_ops),
898 MAX8997_VOLTAGE_REGULATOR(BUCK5, max8997_buck_ops),
899 MAX8997_VOLTAGE_REGULATOR(BUCK6, max8997_fixedvolt_ops),
900 MAX8997_VOLTAGE_REGULATOR(BUCK7, max8997_buck_ops),
901 MAX8997_VOLTAGE_REGULATOR(EN32KHZ_AP, max8997_fixedvolt_ops),
902 MAX8997_VOLTAGE_REGULATOR(EN32KHZ_CP, max8997_fixedvolt_ops),
903 MAX8997_VOLTAGE_REGULATOR(ENVICHG, max8997_fixedvolt_ops),
904 MAX8997_VOLTAGE_REGULATOR(ESAFEOUT1, max8997_safeout_ops),
905 MAX8997_VOLTAGE_REGULATOR(ESAFEOUT2, max8997_safeout_ops),
906 MAX8997_VOLTAGE_REGULATOR(CHARGER_CV, max8997_fixedstate_ops),
907 MAX8997_CURRENT_REGULATOR(CHARGER, max8997_charger_ops),
908 MAX8997_CURRENT_REGULATOR(CHARGER_TOPOFF,
909 max8997_charger_fixedstate_ops),
bd6ca2cf
MH		 910};
911
912static __devinit int max8997_pmic_probe(struct platform_device *pdev)
913{
914 struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent);
915 struct max8997_platform_data *pdata = dev_get_platdata(iodev->dev);
916 struct regulator_dev **rdev;
917 struct max8997_data *max8997;
918 struct i2c_client *i2c;
919 int i, ret, size;
920 u8 max_buck1 = 0, max_buck2 = 0, max_buck5 = 0;
921
922 if (!pdata) {
923 dev_err(pdev->dev.parent, "No platform init data supplied.\n");
924 return -ENODEV;
925 }
926
927 max8997 = kzalloc(sizeof(struct max8997_data), GFP_KERNEL);
928 if (!max8997)
929 return -ENOMEM;
930
931 size = sizeof(struct regulator_dev *) * pdata->num_regulators;
932 max8997->rdev = kzalloc(size, GFP_KERNEL);
933 if (!max8997->rdev) {
934 kfree(max8997);
935 return -ENOMEM;
936 }
937
938 rdev = max8997->rdev;
939 max8997->dev = &pdev->dev;
940 max8997->iodev = iodev;
941 max8997->num_regulators = pdata->num_regulators;
942 platform_set_drvdata(pdev, max8997);
943 i2c = max8997->iodev->i2c;
944
945 max8997->buck125_gpioindex = pdata->buck125_default_idx;
6e0414a5
MH		 946 max8997->buck1_gpiodvs = pdata->buck1_gpiodvs;
947 max8997->buck2_gpiodvs = pdata->buck2_gpiodvs;
948 max8997->buck5_gpiodvs = pdata->buck5_gpiodvs;
949 memcpy(max8997->buck125_gpios, pdata->buck125_gpios, sizeof(int) * 3);
950 max8997->ignore_gpiodvs_side_effect = pdata->ignore_gpiodvs_side_effect;
bd6ca2cf
MH		 951
952 for (i = 0; i < 8; i++) {
953 max8997->buck1_vol[i] = ret =
954 max8997_get_voltage_proper_val(
955 &buck1245_voltage_map_desc,
956 pdata->buck1_voltage[i] / 1000,
957 pdata->buck1_voltage[i] / 1000 +
958 buck1245_voltage_map_desc.step);
959 if (ret < 0)
960 goto err_alloc;
961
962 max8997->buck2_vol[i] = ret =
963 max8997_get_voltage_proper_val(
964 &buck1245_voltage_map_desc,
965 pdata->buck2_voltage[i] / 1000,
966 pdata->buck2_voltage[i] / 1000 +
967 buck1245_voltage_map_desc.step);
968 if (ret < 0)
969 goto err_alloc;
970
971 max8997->buck5_vol[i] = ret =
972 max8997_get_voltage_proper_val(
973 &buck1245_voltage_map_desc,
974 pdata->buck5_voltage[i] / 1000,
975 pdata->buck5_voltage[i] / 1000 +
976 buck1245_voltage_map_desc.step);
977 if (ret < 0)
978 goto err_alloc;
979
980 if (max_buck1 < max8997->buck1_vol[i])
981 max_buck1 = max8997->buck1_vol[i];
982 if (max_buck2 < max8997->buck2_vol[i])
983 max_buck2 = max8997->buck2_vol[i];
984 if (max_buck5 < max8997->buck5_vol[i])
985 max_buck5 = max8997->buck5_vol[i];
986 }
987
988 /* For the safety, set max voltage before setting up */
989 for (i = 0; i < 8; i++) {
ecb9c4f5 990 max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i,
bd6ca2cf 991 max_buck1, 0x3f);
ecb9c4f5 992 max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i,
bd6ca2cf 993 max_buck2, 0x3f);
ecb9c4f5 994 max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i,
bd6ca2cf
MH		 995 max_buck5, 0x3f);
996 }
997
998 /*
999 * If buck 1, 2, and 5 do not care DVS GPIO settings, ignore them.
1000 * If at least one of them cares, set gpios.
1001 */
1002 if (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs ||
1003 pdata->buck5_gpiodvs) {
1004 bool gpio1set = false, gpio2set = false;
1005
1006 if (!gpio_is_valid(pdata->buck125_gpios[0]) ||
1007 !gpio_is_valid(pdata->buck125_gpios[1]) ||
1008 !gpio_is_valid(pdata->buck125_gpios[2])) {
1009 dev_err(&pdev->dev, "GPIO NOT VALID\n");
1010 ret = -EINVAL;
1011 goto err_alloc;
1012 }
1013
1014 ret = gpio_request(pdata->buck125_gpios[0],
1015 "MAX8997 SET1");
1016 if (ret == -EBUSY)
1017 dev_warn(&pdev->dev, "Duplicated gpio request"
1018 " on SET1\n");
1019 else if (ret)
1020 goto err_alloc;
1021 else
1022 gpio1set = true;
1023
1024 ret = gpio_request(pdata->buck125_gpios[1],
1025 "MAX8997 SET2");
1026 if (ret == -EBUSY)
1027 dev_warn(&pdev->dev, "Duplicated gpio request"
1028 " on SET2\n");
1029 else if (ret) {
1030 if (gpio1set)
1031 gpio_free(pdata->buck125_gpios[0]);
1032 goto err_alloc;
1033 } else
1034 gpio2set = true;
1035
1036 ret = gpio_request(pdata->buck125_gpios[2],
1037 "MAX8997 SET3");
1038 if (ret == -EBUSY)
1039 dev_warn(&pdev->dev, "Duplicated gpio request"
1040 " on SET3\n");
1041 else if (ret) {
1042 if (gpio1set)
1043 gpio_free(pdata->buck125_gpios[0]);
1044 if (gpio2set)
1045 gpio_free(pdata->buck125_gpios[1]);
1046 goto err_alloc;
1047 }
1048
1049 gpio_direction_output(pdata->buck125_gpios[0],
1050 (max8997->buck125_gpioindex >> 2)
1051 & 0x1); /* SET1 */
1052 gpio_direction_output(pdata->buck125_gpios[1],
1053 (max8997->buck125_gpioindex >> 1)
1054 & 0x1); /* SET2 */
1055 gpio_direction_output(pdata->buck125_gpios[2],
1056 (max8997->buck125_gpioindex >> 0)
1057 & 0x1); /* SET3 */
1058 ret = 0;
1059 }
1060
1061 /* DVS-GPIO disabled */
1062 max8997_update_reg(i2c, MAX8997_REG_BUCK1CTRL, (pdata->buck1_gpiodvs) ?
1063 (1 << 1) : (0 << 1), 1 << 1);
1064 max8997_update_reg(i2c, MAX8997_REG_BUCK2CTRL, (pdata->buck2_gpiodvs) ?
1065 (1 << 1) : (0 << 1), 1 << 1);
1066 max8997_update_reg(i2c, MAX8997_REG_BUCK5CTRL, (pdata->buck5_gpiodvs) ?
1067 (1 << 1) : (0 << 1), 1 << 1);
1068
1069 /* Initialize all the DVS related BUCK registers */
1070 for (i = 0; i < 8; i++) {
ecb9c4f5 1071 max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i,
bd6ca2cf
MH		 1072 max8997->buck1_vol[i],
1073 0x3f);
ecb9c4f5 1074 max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i,
bd6ca2cf
MH		 1075 max8997->buck2_vol[i],
1076 0x3f);
ecb9c4f5 1077 max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i,
bd6ca2cf
MH		 1078 max8997->buck5_vol[i],
1079 0x3f);
1080 }
1081
dbb48e7c
TB		 1082 /* Misc Settings */
1083 max8997->ramp_delay = 10; /* set 10mV/us, which is the default */
1084 max8997_write_reg(i2c, MAX8997_REG_BUCKRAMP, (0xf << 4) | 0x9);
1085
bd6ca2cf
MH		 1086 for (i = 0; i < pdata->num_regulators; i++) {
1087 const struct voltage_map_desc *desc;
1088 int id = pdata->regulators[i].id;
1089
1090 desc = reg_voltage_map[id];
1091 if (desc)
1092 regulators[id].n_voltages =
1093 (desc->max - desc->min) / desc->step + 1;
1094 else if (id == MAX8997_ESAFEOUT1 || id == MAX8997_ESAFEOUT2)
1095 regulators[id].n_voltages = 4;
1096 else if (id == MAX8997_CHARGER_CV)
1097 regulators[id].n_voltages = 16;
1098
1099 rdev[i] = regulator_register(&regulators[id], max8997->dev,
2c043bcb 1100 pdata->regulators[i].initdata, max8997, NULL);
bd6ca2cf
MH		 1101 if (IS_ERR(rdev[i])) {
1102 ret = PTR_ERR(rdev[i]);
1103 dev_err(max8997->dev, "regulator init failed for %d\n",
1104 id);
1105 rdev[i] = NULL;
1106 goto err;
1107 }
1108 }
1109
bd6ca2cf
MH		 1110 return 0;
1111err:
1112 for (i = 0; i < max8997->num_regulators; i++)
1113 if (rdev[i])
1114 regulator_unregister(rdev[i]);
1115err_alloc:
1116 kfree(max8997->rdev);
1117 kfree(max8997);
1118
1119 return ret;
1120}
1121
1122static int __devexit max8997_pmic_remove(struct platform_device *pdev)
1123{
1124 struct max8997_data *max8997 = platform_get_drvdata(pdev);
1125 struct regulator_dev **rdev = max8997->rdev;
1126 int i;
1127
1128 for (i = 0; i < max8997->num_regulators; i++)
1129 if (rdev[i])
1130 regulator_unregister(rdev[i]);
1131
1132 kfree(max8997->rdev);
1133 kfree(max8997);
1134
1135 return 0;
1136}
1137
1138static const struct platform_device_id max8997_pmic_id[] = {
1139 { "max8997-pmic", 0},
1140 { },
1141};
a51b907b 1142MODULE_DEVICE_TABLE(platform, max8997_pmic_id);
bd6ca2cf
MH		 1143
1144static struct platform_driver max8997_pmic_driver = {
1145 .driver = {
1146 .name = "max8997-pmic",
1147 .owner = THIS_MODULE,
1148 },
1149 .probe = max8997_pmic_probe,
1150 .remove = __devexit_p(max8997_pmic_remove),
1151 .id_table = max8997_pmic_id,
1152};
1153
1154static int __init max8997_pmic_init(void)
1155{
1156 return platform_driver_register(&max8997_pmic_driver);
1157}
1158subsys_initcall(max8997_pmic_init);
1159
1160static void __exit max8997_pmic_cleanup(void)
1161{
1162 platform_driver_unregister(&max8997_pmic_driver);
1163}
1164module_exit(max8997_pmic_cleanup);
1165
1166MODULE_DESCRIPTION("MAXIM 8997/8966 Regulator Driver");
1167MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
1168MODULE_LICENSE("GPL");
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