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regulator: max8997: Convert max8997_safeout_ops to set_voltage_sel and list_voltage_table
[deliverable/linux.git] / drivers / regulator / max8997.c
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/err.h>
26 #include <linux/gpio.h>
27 #include <linux/of_gpio.h>
28 #include <linux/slab.h>
29 #include <linux/module.h>
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 #include <linux/regulator/of_regulator.h>
36
37 struct 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
44 bool buck1_gpiodvs;
45 bool buck2_gpiodvs;
46 bool buck5_gpiodvs;
47 u8 buck1_vol[8];
48 u8 buck2_vol[8];
49 u8 buck5_vol[8];
50 int buck125_gpios[3];
51 int buck125_gpioindex;
52 bool ignore_gpiodvs_side_effect;
53
54 u8 saved_states[MAX8997_REG_MAX];
55 };
56
57 static const unsigned int safeoutvolt[] = {
58 4850000,
59 4900000,
60 4950000,
61 3300000,
62 };
63
64 static inline void max8997_set_gpio(struct max8997_data *max8997)
65 {
66 int set3 = (max8997->buck125_gpioindex) & 0x1;
67 int set2 = ((max8997->buck125_gpioindex) >> 1) & 0x1;
68 int set1 = ((max8997->buck125_gpioindex) >> 2) & 0x1;
69
70 gpio_set_value(max8997->buck125_gpios[0], set1);
71 gpio_set_value(max8997->buck125_gpios[1], set2);
72 gpio_set_value(max8997->buck125_gpios[2], set3);
73 }
74
75 struct voltage_map_desc {
76 int min;
77 int max;
78 int step;
79 };
80
81 /* Voltage maps in mV */
82 static const struct voltage_map_desc ldo_voltage_map_desc = {
83 .min = 800, .max = 3950, .step = 50,
84 }; /* LDO1 ~ 18, 21 all */
85
86 static const struct voltage_map_desc buck1245_voltage_map_desc = {
87 .min = 650, .max = 2225, .step = 25,
88 }; /* Buck1, 2, 4, 5 */
89
90 static const struct voltage_map_desc buck37_voltage_map_desc = {
91 .min = 750, .max = 3900, .step = 50,
92 }; /* Buck3, 7 */
93
94 /* current map in mA */
95 static const struct voltage_map_desc charger_current_map_desc = {
96 .min = 200, .max = 950, .step = 50,
97 };
98
99 static const struct voltage_map_desc topoff_current_map_desc = {
100 .min = 50, .max = 200, .step = 10,
101 };
102
103 static const struct voltage_map_desc *reg_voltage_map[] = {
104 [MAX8997_LDO1] = &ldo_voltage_map_desc,
105 [MAX8997_LDO2] = &ldo_voltage_map_desc,
106 [MAX8997_LDO3] = &ldo_voltage_map_desc,
107 [MAX8997_LDO4] = &ldo_voltage_map_desc,
108 [MAX8997_LDO5] = &ldo_voltage_map_desc,
109 [MAX8997_LDO6] = &ldo_voltage_map_desc,
110 [MAX8997_LDO7] = &ldo_voltage_map_desc,
111 [MAX8997_LDO8] = &ldo_voltage_map_desc,
112 [MAX8997_LDO9] = &ldo_voltage_map_desc,
113 [MAX8997_LDO10] = &ldo_voltage_map_desc,
114 [MAX8997_LDO11] = &ldo_voltage_map_desc,
115 [MAX8997_LDO12] = &ldo_voltage_map_desc,
116 [MAX8997_LDO13] = &ldo_voltage_map_desc,
117 [MAX8997_LDO14] = &ldo_voltage_map_desc,
118 [MAX8997_LDO15] = &ldo_voltage_map_desc,
119 [MAX8997_LDO16] = &ldo_voltage_map_desc,
120 [MAX8997_LDO17] = &ldo_voltage_map_desc,
121 [MAX8997_LDO18] = &ldo_voltage_map_desc,
122 [MAX8997_LDO21] = &ldo_voltage_map_desc,
123 [MAX8997_BUCK1] = &buck1245_voltage_map_desc,
124 [MAX8997_BUCK2] = &buck1245_voltage_map_desc,
125 [MAX8997_BUCK3] = &buck37_voltage_map_desc,
126 [MAX8997_BUCK4] = &buck1245_voltage_map_desc,
127 [MAX8997_BUCK5] = &buck1245_voltage_map_desc,
128 [MAX8997_BUCK6] = NULL,
129 [MAX8997_BUCK7] = &buck37_voltage_map_desc,
130 [MAX8997_EN32KHZ_AP] = NULL,
131 [MAX8997_EN32KHZ_CP] = NULL,
132 [MAX8997_ENVICHG] = NULL,
133 [MAX8997_ESAFEOUT1] = NULL,
134 [MAX8997_ESAFEOUT2] = NULL,
135 [MAX8997_CHARGER_CV] = NULL,
136 [MAX8997_CHARGER] = &charger_current_map_desc,
137 [MAX8997_CHARGER_TOPOFF] = &topoff_current_map_desc,
138 };
139
140 static int max8997_list_voltage_charger_cv(struct regulator_dev *rdev,
141 unsigned int selector)
142 {
143 int rid = rdev_get_id(rdev);
144
145 if (rid != MAX8997_CHARGER_CV)
146 goto err;
147
148 switch (selector) {
149 case 0x00:
150 return 4200000;
151 case 0x01 ... 0x0E:
152 return 4000000 + 20000 * (selector - 0x01);
153 case 0x0F:
154 return 4350000;
155 default:
156 return -EINVAL;
157 }
158 err:
159 return -EINVAL;
160 }
161
162 static int max8997_list_voltage(struct regulator_dev *rdev,
163 unsigned int selector)
164 {
165 const struct voltage_map_desc *desc;
166 int rid = rdev_get_id(rdev);
167 int val;
168
169 if (rid >= ARRAY_SIZE(reg_voltage_map) ||
170 rid < 0)
171 return -EINVAL;
172
173 desc = reg_voltage_map[rid];
174 if (desc == NULL)
175 return -EINVAL;
176
177 val = desc->min + desc->step * selector;
178 if (val > desc->max)
179 return -EINVAL;
180
181 return val * 1000;
182 }
183
184 static int max8997_get_enable_register(struct regulator_dev *rdev,
185 int *reg, int *mask, int *pattern)
186 {
187 int rid = rdev_get_id(rdev);
188
189 switch (rid) {
190 case MAX8997_LDO1 ... MAX8997_LDO21:
191 *reg = MAX8997_REG_LDO1CTRL + (rid - MAX8997_LDO1);
192 *mask = 0xC0;
193 *pattern = 0xC0;
194 break;
195 case MAX8997_BUCK1:
196 *reg = MAX8997_REG_BUCK1CTRL;
197 *mask = 0x01;
198 *pattern = 0x01;
199 break;
200 case MAX8997_BUCK2:
201 *reg = MAX8997_REG_BUCK2CTRL;
202 *mask = 0x01;
203 *pattern = 0x01;
204 break;
205 case MAX8997_BUCK3:
206 *reg = MAX8997_REG_BUCK3CTRL;
207 *mask = 0x01;
208 *pattern = 0x01;
209 break;
210 case MAX8997_BUCK4:
211 *reg = MAX8997_REG_BUCK4CTRL;
212 *mask = 0x01;
213 *pattern = 0x01;
214 break;
215 case MAX8997_BUCK5:
216 *reg = MAX8997_REG_BUCK5CTRL;
217 *mask = 0x01;
218 *pattern = 0x01;
219 break;
220 case MAX8997_BUCK6:
221 *reg = MAX8997_REG_BUCK6CTRL;
222 *mask = 0x01;
223 *pattern = 0x01;
224 break;
225 case MAX8997_BUCK7:
226 *reg = MAX8997_REG_BUCK7CTRL;
227 *mask = 0x01;
228 *pattern = 0x01;
229 break;
230 case MAX8997_EN32KHZ_AP ... MAX8997_EN32KHZ_CP:
231 *reg = MAX8997_REG_MAINCON1;
232 *mask = 0x01 << (rid - MAX8997_EN32KHZ_AP);
233 *pattern = 0x01 << (rid - MAX8997_EN32KHZ_AP);
234 break;
235 case MAX8997_ENVICHG:
236 *reg = MAX8997_REG_MBCCTRL1;
237 *mask = 0x80;
238 *pattern = 0x80;
239 break;
240 case MAX8997_ESAFEOUT1 ... MAX8997_ESAFEOUT2:
241 *reg = MAX8997_REG_SAFEOUTCTRL;
242 *mask = 0x40 << (rid - MAX8997_ESAFEOUT1);
243 *pattern = 0x40 << (rid - MAX8997_ESAFEOUT1);
244 break;
245 case MAX8997_CHARGER:
246 *reg = MAX8997_REG_MBCCTRL2;
247 *mask = 0x40;
248 *pattern = 0x40;
249 break;
250 default:
251 /* Not controllable or not exists */
252 return -EINVAL;
253 }
254
255 return 0;
256 }
257
258 static int max8997_reg_is_enabled(struct regulator_dev *rdev)
259 {
260 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
261 struct i2c_client *i2c = max8997->iodev->i2c;
262 int ret, reg, mask, pattern;
263 u8 val;
264
265 ret = max8997_get_enable_register(rdev, &reg, &mask, &pattern);
266 if (ret)
267 return ret;
268
269 ret = max8997_read_reg(i2c, reg, &val);
270 if (ret)
271 return ret;
272
273 return (val & mask) == pattern;
274 }
275
276 static int max8997_reg_enable(struct regulator_dev *rdev)
277 {
278 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
279 struct i2c_client *i2c = max8997->iodev->i2c;
280 int ret, reg, mask, pattern;
281
282 ret = max8997_get_enable_register(rdev, &reg, &mask, &pattern);
283 if (ret)
284 return ret;
285
286 return max8997_update_reg(i2c, reg, pattern, mask);
287 }
288
289 static int max8997_reg_disable(struct regulator_dev *rdev)
290 {
291 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
292 struct i2c_client *i2c = max8997->iodev->i2c;
293 int ret, reg, mask, pattern;
294
295 ret = max8997_get_enable_register(rdev, &reg, &mask, &pattern);
296 if (ret)
297 return ret;
298
299 return max8997_update_reg(i2c, reg, ~pattern, mask);
300 }
301
302 static int max8997_get_voltage_register(struct regulator_dev *rdev,
303 int *_reg, int *_shift, int *_mask)
304 {
305 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
306 int rid = rdev_get_id(rdev);
307 int reg, shift = 0, mask = 0x3f;
308
309 switch (rid) {
310 case MAX8997_LDO1 ... MAX8997_LDO21:
311 reg = MAX8997_REG_LDO1CTRL + (rid - MAX8997_LDO1);
312 break;
313 case MAX8997_BUCK1:
314 reg = MAX8997_REG_BUCK1DVS1;
315 if (max8997->buck1_gpiodvs)
316 reg += max8997->buck125_gpioindex;
317 break;
318 case MAX8997_BUCK2:
319 reg = MAX8997_REG_BUCK2DVS1;
320 if (max8997->buck2_gpiodvs)
321 reg += max8997->buck125_gpioindex;
322 break;
323 case MAX8997_BUCK3:
324 reg = MAX8997_REG_BUCK3DVS;
325 break;
326 case MAX8997_BUCK4:
327 reg = MAX8997_REG_BUCK4DVS;
328 break;
329 case MAX8997_BUCK5:
330 reg = MAX8997_REG_BUCK5DVS1;
331 if (max8997->buck5_gpiodvs)
332 reg += max8997->buck125_gpioindex;
333 break;
334 case MAX8997_BUCK7:
335 reg = MAX8997_REG_BUCK7DVS;
336 break;
337 case MAX8997_ESAFEOUT1 ... MAX8997_ESAFEOUT2:
338 reg = MAX8997_REG_SAFEOUTCTRL;
339 shift = (rid == MAX8997_ESAFEOUT2) ? 2 : 0;
340 mask = 0x3;
341 break;
342 case MAX8997_CHARGER_CV:
343 reg = MAX8997_REG_MBCCTRL3;
344 shift = 0;
345 mask = 0xf;
346 break;
347 case MAX8997_CHARGER:
348 reg = MAX8997_REG_MBCCTRL4;
349 shift = 0;
350 mask = 0xf;
351 break;
352 case MAX8997_CHARGER_TOPOFF:
353 reg = MAX8997_REG_MBCCTRL5;
354 shift = 0;
355 mask = 0xf;
356 break;
357 default:
358 return -EINVAL;
359 }
360
361 *_reg = reg;
362 *_shift = shift;
363 *_mask = mask;
364
365 return 0;
366 }
367
368 static int max8997_get_voltage_sel(struct regulator_dev *rdev)
369 {
370 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
371 struct i2c_client *i2c = max8997->iodev->i2c;
372 int reg, shift, mask, ret;
373 u8 val;
374
375 ret = max8997_get_voltage_register(rdev, &reg, &shift, &mask);
376 if (ret)
377 return ret;
378
379 ret = max8997_read_reg(i2c, reg, &val);
380 if (ret)
381 return ret;
382
383 val >>= shift;
384 val &= mask;
385
386 return val;
387 }
388
389 static inline int max8997_get_voltage_proper_val(
390 const struct voltage_map_desc *desc,
391 int min_vol, int max_vol)
392 {
393 int i;
394
395 if (desc == NULL)
396 return -EINVAL;
397
398 if (max_vol < desc->min || min_vol > desc->max)
399 return -EINVAL;
400
401 if (min_vol < desc->min)
402 min_vol = desc->min;
403
404 i = DIV_ROUND_UP(min_vol - desc->min, desc->step);
405
406 if (desc->min + desc->step * i > max_vol)
407 return -EINVAL;
408
409 return i;
410 }
411
412 static int max8997_set_voltage_charger_cv(struct regulator_dev *rdev,
413 int min_uV, int max_uV, unsigned *selector)
414 {
415 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
416 struct i2c_client *i2c = max8997->iodev->i2c;
417 int rid = rdev_get_id(rdev);
418 int lb, ub;
419 int reg, shift = 0, mask, ret = 0;
420 u8 val = 0x0;
421
422 if (rid != MAX8997_CHARGER_CV)
423 return -EINVAL;
424
425 ret = max8997_get_voltage_register(rdev, &reg, &shift, &mask);
426 if (ret)
427 return ret;
428
429 if (max_uV < 4000000 || min_uV > 4350000)
430 return -EINVAL;
431
432 if (min_uV <= 4000000) {
433 if (max_uV >= 4000000)
434 return -EINVAL;
435 else
436 val = 0x1;
437 } else if (min_uV <= 4200000 && max_uV >= 4200000)
438 val = 0x0;
439 else {
440 lb = (min_uV - 4000001) / 20000 + 2;
441 ub = (max_uV - 4000000) / 20000 + 1;
442
443 if (lb > ub)
444 return -EINVAL;
445
446 if (lb < 0xf)
447 val = lb;
448 else {
449 if (ub >= 0xf)
450 val = 0xf;
451 else
452 return -EINVAL;
453 }
454 }
455
456 *selector = val;
457
458 ret = max8997_update_reg(i2c, reg, val << shift, mask);
459
460 return ret;
461 }
462
463 /*
464 * For LDO1 ~ LDO21, BUCK1~5, BUCK7, CHARGER, CHARGER_TOPOFF
465 * BUCK1, 2, and 5 are available if they are not controlled by gpio
466 */
467 static int max8997_set_voltage_ldobuck(struct regulator_dev *rdev,
468 int min_uV, int max_uV, unsigned *selector)
469 {
470 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
471 struct i2c_client *i2c = max8997->iodev->i2c;
472 int min_vol = min_uV / 1000, max_vol = max_uV / 1000;
473 const struct voltage_map_desc *desc;
474 int rid = rdev_get_id(rdev);
475 int i, reg, shift, mask, ret;
476
477 switch (rid) {
478 case MAX8997_LDO1 ... MAX8997_LDO21:
479 break;
480 case MAX8997_BUCK1 ... MAX8997_BUCK5:
481 break;
482 case MAX8997_BUCK6:
483 return -EINVAL;
484 case MAX8997_BUCK7:
485 break;
486 case MAX8997_CHARGER:
487 break;
488 case MAX8997_CHARGER_TOPOFF:
489 break;
490 default:
491 return -EINVAL;
492 }
493
494 desc = reg_voltage_map[rid];
495
496 i = max8997_get_voltage_proper_val(desc, min_vol, max_vol);
497 if (i < 0)
498 return i;
499
500 ret = max8997_get_voltage_register(rdev, &reg, &shift, &mask);
501 if (ret)
502 return ret;
503
504 ret = max8997_update_reg(i2c, reg, i << shift, mask << shift);
505 *selector = i;
506
507 return ret;
508 }
509
510 static int max8997_set_voltage_buck_time_sel(struct regulator_dev *rdev,
511 unsigned int old_selector,
512 unsigned int new_selector)
513 {
514 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
515 int rid = rdev_get_id(rdev);
516 const struct voltage_map_desc *desc = reg_voltage_map[rid];
517
518 /* Delay is required only if the voltage is increasing */
519 if (old_selector >= new_selector)
520 return 0;
521
522 /* No need to delay if gpio_dvs_mode */
523 switch (rid) {
524 case MAX8997_BUCK1:
525 if (max8997->buck1_gpiodvs)
526 return 0;
527 break;
528 case MAX8997_BUCK2:
529 if (max8997->buck2_gpiodvs)
530 return 0;
531 break;
532 case MAX8997_BUCK5:
533 if (max8997->buck5_gpiodvs)
534 return 0;
535 break;
536 }
537
538 switch (rid) {
539 case MAX8997_BUCK1:
540 case MAX8997_BUCK2:
541 case MAX8997_BUCK4:
542 case MAX8997_BUCK5:
543 return DIV_ROUND_UP(desc->step * (new_selector - old_selector),
544 max8997->ramp_delay);
545 }
546
547 return 0;
548 }
549
550 /*
551 * Assess the damage on the voltage setting of BUCK1,2,5 by the change.
552 *
553 * When GPIO-DVS mode is used for multiple bucks, changing the voltage value
554 * of one of the bucks may affect that of another buck, which is the side
555 * effect of the change (set_voltage). This function examines the GPIO-DVS
556 * configurations and checks whether such side-effect exists.
557 */
558 static int max8997_assess_side_effect(struct regulator_dev *rdev,
559 u8 new_val, int *best)
560 {
561 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
562 int rid = rdev_get_id(rdev);
563 u8 *buckx_val[3];
564 bool buckx_gpiodvs[3];
565 int side_effect[8];
566 int min_side_effect = INT_MAX;
567 int i;
568
569 *best = -1;
570
571 switch (rid) {
572 case MAX8997_BUCK1:
573 rid = 0;
574 break;
575 case MAX8997_BUCK2:
576 rid = 1;
577 break;
578 case MAX8997_BUCK5:
579 rid = 2;
580 break;
581 default:
582 return -EINVAL;
583 }
584
585 buckx_val[0] = max8997->buck1_vol;
586 buckx_val[1] = max8997->buck2_vol;
587 buckx_val[2] = max8997->buck5_vol;
588 buckx_gpiodvs[0] = max8997->buck1_gpiodvs;
589 buckx_gpiodvs[1] = max8997->buck2_gpiodvs;
590 buckx_gpiodvs[2] = max8997->buck5_gpiodvs;
591
592 for (i = 0; i < 8; i++) {
593 int others;
594
595 if (new_val != (buckx_val[rid])[i]) {
596 side_effect[i] = -1;
597 continue;
598 }
599
600 side_effect[i] = 0;
601 for (others = 0; others < 3; others++) {
602 int diff;
603
604 if (others == rid)
605 continue;
606 if (buckx_gpiodvs[others] == false)
607 continue; /* Not affected */
608 diff = (buckx_val[others])[i] -
609 (buckx_val[others])[max8997->buck125_gpioindex];
610 if (diff > 0)
611 side_effect[i] += diff;
612 else if (diff < 0)
613 side_effect[i] -= diff;
614 }
615 if (side_effect[i] == 0) {
616 *best = i;
617 return 0; /* NO SIDE EFFECT! Use This! */
618 }
619 if (side_effect[i] < min_side_effect) {
620 min_side_effect = side_effect[i];
621 *best = i;
622 }
623 }
624
625 if (*best == -1)
626 return -EINVAL;
627
628 return side_effect[*best];
629 }
630
631 /*
632 * For Buck 1 ~ 5 and 7. If it is not controlled by GPIO, this calls
633 * max8997_set_voltage_ldobuck to do the job.
634 */
635 static int max8997_set_voltage_buck(struct regulator_dev *rdev,
636 int min_uV, int max_uV, unsigned *selector)
637 {
638 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
639 int rid = rdev_get_id(rdev);
640 const struct voltage_map_desc *desc;
641 int new_val, new_idx, damage, tmp_val, tmp_idx, tmp_dmg;
642 bool gpio_dvs_mode = false;
643 int min_vol = min_uV / 1000, max_vol = max_uV / 1000;
644
645 if (rid < MAX8997_BUCK1 || rid > MAX8997_BUCK7)
646 return -EINVAL;
647
648 switch (rid) {
649 case MAX8997_BUCK1:
650 if (max8997->buck1_gpiodvs)
651 gpio_dvs_mode = true;
652 break;
653 case MAX8997_BUCK2:
654 if (max8997->buck2_gpiodvs)
655 gpio_dvs_mode = true;
656 break;
657 case MAX8997_BUCK5:
658 if (max8997->buck5_gpiodvs)
659 gpio_dvs_mode = true;
660 break;
661 }
662
663 if (!gpio_dvs_mode)
664 return max8997_set_voltage_ldobuck(rdev, min_uV, max_uV,
665 selector);
666
667 desc = reg_voltage_map[rid];
668 new_val = max8997_get_voltage_proper_val(desc, min_vol, max_vol);
669 if (new_val < 0)
670 return new_val;
671
672 tmp_dmg = INT_MAX;
673 tmp_idx = -1;
674 tmp_val = -1;
675 do {
676 damage = max8997_assess_side_effect(rdev, new_val, &new_idx);
677 if (damage == 0)
678 goto out;
679
680 if (tmp_dmg > damage) {
681 tmp_idx = new_idx;
682 tmp_val = new_val;
683 tmp_dmg = damage;
684 }
685
686 new_val++;
687 } while (desc->min + desc->step * new_val <= desc->max);
688
689 new_idx = tmp_idx;
690 new_val = tmp_val;
691
692 if (max8997->ignore_gpiodvs_side_effect == false)
693 return -EINVAL;
694
695 dev_warn(&rdev->dev, "MAX8997 GPIO-DVS Side Effect Warning: GPIO SET:"
696 " %d -> %d\n", max8997->buck125_gpioindex, tmp_idx);
697
698 out:
699 if (new_idx < 0 || new_val < 0)
700 return -EINVAL;
701
702 max8997->buck125_gpioindex = new_idx;
703 max8997_set_gpio(max8997);
704 *selector = new_val;
705
706 return 0;
707 }
708
709 /* For SAFEOUT1 and SAFEOUT2 */
710 static int max8997_set_voltage_safeout_sel(struct regulator_dev *rdev,
711 unsigned selector)
712 {
713 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
714 struct i2c_client *i2c = max8997->iodev->i2c;
715 int rid = rdev_get_id(rdev);
716 int reg, shift = 0, mask, ret;
717
718 if (rid != MAX8997_ESAFEOUT1 && rid != MAX8997_ESAFEOUT2)
719 return -EINVAL;
720
721 ret = max8997_get_voltage_register(rdev, &reg, &shift, &mask);
722 if (ret)
723 return ret;
724
725 return max8997_update_reg(i2c, reg, selector << shift, mask << shift);
726 }
727
728 static int max8997_reg_disable_suspend(struct regulator_dev *rdev)
729 {
730 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
731 struct i2c_client *i2c = max8997->iodev->i2c;
732 int ret, reg, mask, pattern;
733 int rid = rdev_get_id(rdev);
734
735 ret = max8997_get_enable_register(rdev, &reg, &mask, &pattern);
736 if (ret)
737 return ret;
738
739 max8997_read_reg(i2c, reg, &max8997->saved_states[rid]);
740
741 if (rid == MAX8997_LDO1 ||
742 rid == MAX8997_LDO10 ||
743 rid == MAX8997_LDO21) {
744 dev_dbg(&rdev->dev, "Conditional Power-Off for %s\n",
745 rdev->desc->name);
746 return max8997_update_reg(i2c, reg, 0x40, mask);
747 }
748
749 dev_dbg(&rdev->dev, "Full Power-Off for %s (%xh -> %xh)\n",
750 rdev->desc->name, max8997->saved_states[rid] & mask,
751 (~pattern) & mask);
752 return max8997_update_reg(i2c, reg, ~pattern, mask);
753 }
754
755 static struct regulator_ops max8997_ldo_ops = {
756 .list_voltage = max8997_list_voltage,
757 .is_enabled = max8997_reg_is_enabled,
758 .enable = max8997_reg_enable,
759 .disable = max8997_reg_disable,
760 .get_voltage_sel = max8997_get_voltage_sel,
761 .set_voltage = max8997_set_voltage_ldobuck,
762 .set_suspend_disable = max8997_reg_disable_suspend,
763 };
764
765 static struct regulator_ops max8997_buck_ops = {
766 .list_voltage = max8997_list_voltage,
767 .is_enabled = max8997_reg_is_enabled,
768 .enable = max8997_reg_enable,
769 .disable = max8997_reg_disable,
770 .get_voltage_sel = max8997_get_voltage_sel,
771 .set_voltage = max8997_set_voltage_buck,
772 .set_voltage_time_sel = max8997_set_voltage_buck_time_sel,
773 .set_suspend_disable = max8997_reg_disable_suspend,
774 };
775
776 static struct regulator_ops max8997_fixedvolt_ops = {
777 .list_voltage = max8997_list_voltage,
778 .is_enabled = max8997_reg_is_enabled,
779 .enable = max8997_reg_enable,
780 .disable = max8997_reg_disable,
781 .set_suspend_disable = max8997_reg_disable_suspend,
782 };
783
784 static struct regulator_ops max8997_safeout_ops = {
785 .list_voltage = regulator_list_voltage_table,
786 .is_enabled = max8997_reg_is_enabled,
787 .enable = max8997_reg_enable,
788 .disable = max8997_reg_disable,
789 .get_voltage_sel = max8997_get_voltage_sel,
790 .set_voltage_sel = max8997_set_voltage_safeout_sel,
791 .set_suspend_disable = max8997_reg_disable_suspend,
792 };
793
794 static struct regulator_ops max8997_fixedstate_ops = {
795 .list_voltage = max8997_list_voltage_charger_cv,
796 .get_voltage_sel = max8997_get_voltage_sel,
797 .set_voltage = max8997_set_voltage_charger_cv,
798 };
799
800 static int max8997_set_current_limit(struct regulator_dev *rdev,
801 int min_uA, int max_uA)
802 {
803 unsigned dummy;
804 int rid = rdev_get_id(rdev);
805
806 if (rid != MAX8997_CHARGER && rid != MAX8997_CHARGER_TOPOFF)
807 return -EINVAL;
808
809 /* Reuse max8997_set_voltage_ldobuck to set current_limit. */
810 return max8997_set_voltage_ldobuck(rdev, min_uA, max_uA, &dummy);
811 }
812
813 static int max8997_get_current_limit(struct regulator_dev *rdev)
814 {
815 int sel, rid = rdev_get_id(rdev);
816
817 if (rid != MAX8997_CHARGER && rid != MAX8997_CHARGER_TOPOFF)
818 return -EINVAL;
819
820 sel = max8997_get_voltage_sel(rdev);
821 if (sel < 0)
822 return sel;
823
824 /* Reuse max8997_list_voltage to get current_limit. */
825 return max8997_list_voltage(rdev, sel);
826 }
827
828 static struct regulator_ops max8997_charger_ops = {
829 .is_enabled = max8997_reg_is_enabled,
830 .enable = max8997_reg_enable,
831 .disable = max8997_reg_disable,
832 .get_current_limit = max8997_get_current_limit,
833 .set_current_limit = max8997_set_current_limit,
834 };
835
836 static struct regulator_ops max8997_charger_fixedstate_ops = {
837 .get_current_limit = max8997_get_current_limit,
838 .set_current_limit = max8997_set_current_limit,
839 };
840
841 #define MAX8997_VOLTAGE_REGULATOR(_name, _ops) {\
842 .name = #_name, \
843 .id = MAX8997_##_name, \
844 .ops = &_ops, \
845 .type = REGULATOR_VOLTAGE, \
846 .owner = THIS_MODULE, \
847 }
848
849 #define MAX8997_CURRENT_REGULATOR(_name, _ops) {\
850 .name = #_name, \
851 .id = MAX8997_##_name, \
852 .ops = &_ops, \
853 .type = REGULATOR_CURRENT, \
854 .owner = THIS_MODULE, \
855 }
856
857 static struct regulator_desc regulators[] = {
858 MAX8997_VOLTAGE_REGULATOR(LDO1, max8997_ldo_ops),
859 MAX8997_VOLTAGE_REGULATOR(LDO2, max8997_ldo_ops),
860 MAX8997_VOLTAGE_REGULATOR(LDO3, max8997_ldo_ops),
861 MAX8997_VOLTAGE_REGULATOR(LDO4, max8997_ldo_ops),
862 MAX8997_VOLTAGE_REGULATOR(LDO5, max8997_ldo_ops),
863 MAX8997_VOLTAGE_REGULATOR(LDO6, max8997_ldo_ops),
864 MAX8997_VOLTAGE_REGULATOR(LDO7, max8997_ldo_ops),
865 MAX8997_VOLTAGE_REGULATOR(LDO8, max8997_ldo_ops),
866 MAX8997_VOLTAGE_REGULATOR(LDO9, max8997_ldo_ops),
867 MAX8997_VOLTAGE_REGULATOR(LDO10, max8997_ldo_ops),
868 MAX8997_VOLTAGE_REGULATOR(LDO11, max8997_ldo_ops),
869 MAX8997_VOLTAGE_REGULATOR(LDO12, max8997_ldo_ops),
870 MAX8997_VOLTAGE_REGULATOR(LDO13, max8997_ldo_ops),
871 MAX8997_VOLTAGE_REGULATOR(LDO14, max8997_ldo_ops),
872 MAX8997_VOLTAGE_REGULATOR(LDO15, max8997_ldo_ops),
873 MAX8997_VOLTAGE_REGULATOR(LDO16, max8997_ldo_ops),
874 MAX8997_VOLTAGE_REGULATOR(LDO17, max8997_ldo_ops),
875 MAX8997_VOLTAGE_REGULATOR(LDO18, max8997_ldo_ops),
876 MAX8997_VOLTAGE_REGULATOR(LDO21, max8997_ldo_ops),
877 MAX8997_VOLTAGE_REGULATOR(BUCK1, max8997_buck_ops),
878 MAX8997_VOLTAGE_REGULATOR(BUCK2, max8997_buck_ops),
879 MAX8997_VOLTAGE_REGULATOR(BUCK3, max8997_buck_ops),
880 MAX8997_VOLTAGE_REGULATOR(BUCK4, max8997_buck_ops),
881 MAX8997_VOLTAGE_REGULATOR(BUCK5, max8997_buck_ops),
882 MAX8997_VOLTAGE_REGULATOR(BUCK6, max8997_fixedvolt_ops),
883 MAX8997_VOLTAGE_REGULATOR(BUCK7, max8997_buck_ops),
884 MAX8997_VOLTAGE_REGULATOR(EN32KHZ_AP, max8997_fixedvolt_ops),
885 MAX8997_VOLTAGE_REGULATOR(EN32KHZ_CP, max8997_fixedvolt_ops),
886 MAX8997_VOLTAGE_REGULATOR(ENVICHG, max8997_fixedvolt_ops),
887 MAX8997_VOLTAGE_REGULATOR(ESAFEOUT1, max8997_safeout_ops),
888 MAX8997_VOLTAGE_REGULATOR(ESAFEOUT2, max8997_safeout_ops),
889 MAX8997_VOLTAGE_REGULATOR(CHARGER_CV, max8997_fixedstate_ops),
890 MAX8997_CURRENT_REGULATOR(CHARGER, max8997_charger_ops),
891 MAX8997_CURRENT_REGULATOR(CHARGER_TOPOFF,
892 max8997_charger_fixedstate_ops),
893 };
894
895 #ifdef CONFIG_OF
896 static int max8997_pmic_dt_parse_dvs_gpio(struct max8997_dev *iodev,
897 struct max8997_platform_data *pdata,
898 struct device_node *pmic_np)
899 {
900 int i, gpio;
901
902 for (i = 0; i < 3; i++) {
903 gpio = of_get_named_gpio(pmic_np,
904 "max8997,pmic-buck125-dvs-gpios", i);
905 if (!gpio_is_valid(gpio)) {
906 dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio);
907 return -EINVAL;
908 }
909 pdata->buck125_gpios[i] = gpio;
910 }
911 return 0;
912 }
913
914 static int max8997_pmic_dt_parse_pdata(struct max8997_dev *iodev,
915 struct max8997_platform_data *pdata)
916 {
917 struct device_node *pmic_np, *regulators_np, *reg_np;
918 struct max8997_regulator_data *rdata;
919 unsigned int i, dvs_voltage_nr = 1, ret;
920
921 pmic_np = iodev->dev->of_node;
922 if (!pmic_np) {
923 dev_err(iodev->dev, "could not find pmic sub-node\n");
924 return -ENODEV;
925 }
926
927 regulators_np = of_find_node_by_name(pmic_np, "regulators");
928 if (!regulators_np) {
929 dev_err(iodev->dev, "could not find regulators sub-node\n");
930 return -EINVAL;
931 }
932
933 /* count the number of regulators to be supported in pmic */
934 pdata->num_regulators = 0;
935 for_each_child_of_node(regulators_np, reg_np)
936 pdata->num_regulators++;
937
938 rdata = devm_kzalloc(iodev->dev, sizeof(*rdata) *
939 pdata->num_regulators, GFP_KERNEL);
940 if (!rdata) {
941 dev_err(iodev->dev, "could not allocate memory for "
942 "regulator data\n");
943 return -ENOMEM;
944 }
945
946 pdata->regulators = rdata;
947 for_each_child_of_node(regulators_np, reg_np) {
948 for (i = 0; i < ARRAY_SIZE(regulators); i++)
949 if (!of_node_cmp(reg_np->name, regulators[i].name))
950 break;
951
952 if (i == ARRAY_SIZE(regulators)) {
953 dev_warn(iodev->dev, "don't know how to configure "
954 "regulator %s\n", reg_np->name);
955 continue;
956 }
957
958 rdata->id = i;
959 rdata->initdata = of_get_regulator_init_data(
960 iodev->dev, reg_np);
961 rdata->reg_node = reg_np;
962 rdata++;
963 }
964
965 if (of_get_property(pmic_np, "max8997,pmic-buck1-uses-gpio-dvs", NULL))
966 pdata->buck1_gpiodvs = true;
967
968 if (of_get_property(pmic_np, "max8997,pmic-buck2-uses-gpio-dvs", NULL))
969 pdata->buck2_gpiodvs = true;
970
971 if (of_get_property(pmic_np, "max8997,pmic-buck5-uses-gpio-dvs", NULL))
972 pdata->buck5_gpiodvs = true;
973
974 if (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs ||
975 pdata->buck5_gpiodvs) {
976 ret = max8997_pmic_dt_parse_dvs_gpio(iodev, pdata, pmic_np);
977 if (ret)
978 return -EINVAL;
979
980 if (of_property_read_u32(pmic_np,
981 "max8997,pmic-buck125-default-dvs-idx",
982 &pdata->buck125_default_idx)) {
983 pdata->buck125_default_idx = 0;
984 } else {
985 if (pdata->buck125_default_idx >= 8) {
986 pdata->buck125_default_idx = 0;
987 dev_info(iodev->dev, "invalid value for "
988 "default dvs index, using 0 instead\n");
989 }
990 }
991
992 if (of_get_property(pmic_np,
993 "max8997,pmic-ignore-gpiodvs-side-effect", NULL))
994 pdata->ignore_gpiodvs_side_effect = true;
995
996 dvs_voltage_nr = 8;
997 }
998
999 if (of_property_read_u32_array(pmic_np,
1000 "max8997,pmic-buck1-dvs-voltage",
1001 pdata->buck1_voltage, dvs_voltage_nr)) {
1002 dev_err(iodev->dev, "buck1 voltages not specified\n");
1003 return -EINVAL;
1004 }
1005
1006 if (of_property_read_u32_array(pmic_np,
1007 "max8997,pmic-buck2-dvs-voltage",
1008 pdata->buck2_voltage, dvs_voltage_nr)) {
1009 dev_err(iodev->dev, "buck2 voltages not specified\n");
1010 return -EINVAL;
1011 }
1012
1013 if (of_property_read_u32_array(pmic_np,
1014 "max8997,pmic-buck5-dvs-voltage",
1015 pdata->buck5_voltage, dvs_voltage_nr)) {
1016 dev_err(iodev->dev, "buck5 voltages not specified\n");
1017 return -EINVAL;
1018 }
1019
1020 return 0;
1021 }
1022 #else
1023 static int max8997_pmic_dt_parse_pdata(struct max8997_dev *iodev,
1024 struct max8997_platform_data *pdata)
1025 {
1026 return 0;
1027 }
1028 #endif /* CONFIG_OF */
1029
1030 static int max8997_pmic_probe(struct platform_device *pdev)
1031 {
1032 struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent);
1033 struct max8997_platform_data *pdata = iodev->pdata;
1034 struct regulator_config config = { };
1035 struct regulator_dev **rdev;
1036 struct max8997_data *max8997;
1037 struct i2c_client *i2c;
1038 int i, ret, size, nr_dvs;
1039 u8 max_buck1 = 0, max_buck2 = 0, max_buck5 = 0;
1040
1041 if (IS_ERR_OR_NULL(pdata)) {
1042 dev_err(pdev->dev.parent, "No platform init data supplied.\n");
1043 return -ENODEV;
1044 }
1045
1046 if (iodev->dev->of_node) {
1047 ret = max8997_pmic_dt_parse_pdata(iodev, pdata);
1048 if (ret)
1049 return ret;
1050 }
1051
1052 max8997 = devm_kzalloc(&pdev->dev, sizeof(struct max8997_data),
1053 GFP_KERNEL);
1054 if (!max8997)
1055 return -ENOMEM;
1056
1057 size = sizeof(struct regulator_dev *) * pdata->num_regulators;
1058 max8997->rdev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
1059 if (!max8997->rdev)
1060 return -ENOMEM;
1061
1062 rdev = max8997->rdev;
1063 max8997->dev = &pdev->dev;
1064 max8997->iodev = iodev;
1065 max8997->num_regulators = pdata->num_regulators;
1066 platform_set_drvdata(pdev, max8997);
1067 i2c = max8997->iodev->i2c;
1068
1069 max8997->buck125_gpioindex = pdata->buck125_default_idx;
1070 max8997->buck1_gpiodvs = pdata->buck1_gpiodvs;
1071 max8997->buck2_gpiodvs = pdata->buck2_gpiodvs;
1072 max8997->buck5_gpiodvs = pdata->buck5_gpiodvs;
1073 memcpy(max8997->buck125_gpios, pdata->buck125_gpios, sizeof(int) * 3);
1074 max8997->ignore_gpiodvs_side_effect = pdata->ignore_gpiodvs_side_effect;
1075
1076 nr_dvs = (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs ||
1077 pdata->buck5_gpiodvs) ? 8 : 1;
1078
1079 for (i = 0; i < nr_dvs; i++) {
1080 max8997->buck1_vol[i] = ret =
1081 max8997_get_voltage_proper_val(
1082 &buck1245_voltage_map_desc,
1083 pdata->buck1_voltage[i] / 1000,
1084 pdata->buck1_voltage[i] / 1000 +
1085 buck1245_voltage_map_desc.step);
1086 if (ret < 0)
1087 goto err_out;
1088
1089 max8997->buck2_vol[i] = ret =
1090 max8997_get_voltage_proper_val(
1091 &buck1245_voltage_map_desc,
1092 pdata->buck2_voltage[i] / 1000,
1093 pdata->buck2_voltage[i] / 1000 +
1094 buck1245_voltage_map_desc.step);
1095 if (ret < 0)
1096 goto err_out;
1097
1098 max8997->buck5_vol[i] = ret =
1099 max8997_get_voltage_proper_val(
1100 &buck1245_voltage_map_desc,
1101 pdata->buck5_voltage[i] / 1000,
1102 pdata->buck5_voltage[i] / 1000 +
1103 buck1245_voltage_map_desc.step);
1104 if (ret < 0)
1105 goto err_out;
1106
1107 if (max_buck1 < max8997->buck1_vol[i])
1108 max_buck1 = max8997->buck1_vol[i];
1109 if (max_buck2 < max8997->buck2_vol[i])
1110 max_buck2 = max8997->buck2_vol[i];
1111 if (max_buck5 < max8997->buck5_vol[i])
1112 max_buck5 = max8997->buck5_vol[i];
1113 }
1114
1115 /* For the safety, set max voltage before setting up */
1116 for (i = 0; i < 8; i++) {
1117 max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i,
1118 max_buck1, 0x3f);
1119 max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i,
1120 max_buck2, 0x3f);
1121 max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i,
1122 max_buck5, 0x3f);
1123 }
1124
1125 /* Initialize all the DVS related BUCK registers */
1126 for (i = 0; i < nr_dvs; i++) {
1127 max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i,
1128 max8997->buck1_vol[i],
1129 0x3f);
1130 max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i,
1131 max8997->buck2_vol[i],
1132 0x3f);
1133 max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i,
1134 max8997->buck5_vol[i],
1135 0x3f);
1136 }
1137
1138 /*
1139 * If buck 1, 2, and 5 do not care DVS GPIO settings, ignore them.
1140 * If at least one of them cares, set gpios.
1141 */
1142 if (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs ||
1143 pdata->buck5_gpiodvs) {
1144
1145 if (!gpio_is_valid(pdata->buck125_gpios[0]) ||
1146 !gpio_is_valid(pdata->buck125_gpios[1]) ||
1147 !gpio_is_valid(pdata->buck125_gpios[2])) {
1148 dev_err(&pdev->dev, "GPIO NOT VALID\n");
1149 ret = -EINVAL;
1150 goto err_out;
1151 }
1152
1153 ret = devm_gpio_request(&pdev->dev, pdata->buck125_gpios[0],
1154 "MAX8997 SET1");
1155 if (ret)
1156 goto err_out;
1157
1158 ret = devm_gpio_request(&pdev->dev, pdata->buck125_gpios[1],
1159 "MAX8997 SET2");
1160 if (ret)
1161 goto err_out;
1162
1163 ret = devm_gpio_request(&pdev->dev, pdata->buck125_gpios[2],
1164 "MAX8997 SET3");
1165 if (ret)
1166 goto err_out;
1167
1168 gpio_direction_output(pdata->buck125_gpios[0],
1169 (max8997->buck125_gpioindex >> 2)
1170 & 0x1); /* SET1 */
1171 gpio_direction_output(pdata->buck125_gpios[1],
1172 (max8997->buck125_gpioindex >> 1)
1173 & 0x1); /* SET2 */
1174 gpio_direction_output(pdata->buck125_gpios[2],
1175 (max8997->buck125_gpioindex >> 0)
1176 & 0x1); /* SET3 */
1177 }
1178
1179 /* DVS-GPIO disabled */
1180 max8997_update_reg(i2c, MAX8997_REG_BUCK1CTRL, (pdata->buck1_gpiodvs) ?
1181 (1 << 1) : (0 << 1), 1 << 1);
1182 max8997_update_reg(i2c, MAX8997_REG_BUCK2CTRL, (pdata->buck2_gpiodvs) ?
1183 (1 << 1) : (0 << 1), 1 << 1);
1184 max8997_update_reg(i2c, MAX8997_REG_BUCK5CTRL, (pdata->buck5_gpiodvs) ?
1185 (1 << 1) : (0 << 1), 1 << 1);
1186
1187 /* Misc Settings */
1188 max8997->ramp_delay = 10; /* set 10mV/us, which is the default */
1189 max8997_write_reg(i2c, MAX8997_REG_BUCKRAMP, (0xf << 4) | 0x9);
1190
1191 for (i = 0; i < pdata->num_regulators; i++) {
1192 const struct voltage_map_desc *desc;
1193 int id = pdata->regulators[i].id;
1194
1195 desc = reg_voltage_map[id];
1196 if (desc) {
1197 regulators[id].n_voltages =
1198 (desc->max - desc->min) / desc->step + 1;
1199 } else if (id == MAX8997_ESAFEOUT1 || id == MAX8997_ESAFEOUT2) {
1200 regulators[id].volt_table = safeoutvolt;
1201 regulators[id].n_voltages = ARRAY_SIZE(safeoutvolt);
1202 } else if (id == MAX8997_CHARGER_CV) {
1203 regulators[id].n_voltages = 16;
1204 }
1205
1206 config.dev = max8997->dev;
1207 config.init_data = pdata->regulators[i].initdata;
1208 config.driver_data = max8997;
1209 config.of_node = pdata->regulators[i].reg_node;
1210
1211 rdev[i] = regulator_register(&regulators[id], &config);
1212 if (IS_ERR(rdev[i])) {
1213 ret = PTR_ERR(rdev[i]);
1214 dev_err(max8997->dev, "regulator init failed for %d\n",
1215 id);
1216 rdev[i] = NULL;
1217 goto err;
1218 }
1219 }
1220
1221 return 0;
1222 err:
1223 while (--i >= 0)
1224 regulator_unregister(rdev[i]);
1225 err_out:
1226 return ret;
1227 }
1228
1229 static int max8997_pmic_remove(struct platform_device *pdev)
1230 {
1231 struct max8997_data *max8997 = platform_get_drvdata(pdev);
1232 struct regulator_dev **rdev = max8997->rdev;
1233 int i;
1234
1235 for (i = 0; i < max8997->num_regulators; i++)
1236 regulator_unregister(rdev[i]);
1237 return 0;
1238 }
1239
1240 static const struct platform_device_id max8997_pmic_id[] = {
1241 { "max8997-pmic", 0},
1242 { },
1243 };
1244 MODULE_DEVICE_TABLE(platform, max8997_pmic_id);
1245
1246 static struct platform_driver max8997_pmic_driver = {
1247 .driver = {
1248 .name = "max8997-pmic",
1249 .owner = THIS_MODULE,
1250 },
1251 .probe = max8997_pmic_probe,
1252 .remove = max8997_pmic_remove,
1253 .id_table = max8997_pmic_id,
1254 };
1255
1256 static int __init max8997_pmic_init(void)
1257 {
1258 return platform_driver_register(&max8997_pmic_driver);
1259 }
1260 subsys_initcall(max8997_pmic_init);
1261
1262 static void __exit max8997_pmic_cleanup(void)
1263 {
1264 platform_driver_unregister(&max8997_pmic_driver);
1265 }
1266 module_exit(max8997_pmic_cleanup);
1267
1268 MODULE_DESCRIPTION("MAXIM 8997/8966 Regulator Driver");
1269 MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
1270 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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