blob: db09244bb3edb2305d8765cffd270ba5f5a00586 [file] [log] [blame]
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +09001/*
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>
Paul Gortmaker65602c32011-07-17 16:28:23 -040029#include <linux/module.h>
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +090030#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
MyungJoo Ham6e0414a2011-06-20 17:30:17 +090043 bool buck1_gpiodvs;
44 bool buck2_gpiodvs;
45 bool buck5_gpiodvs;
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +090046 u8 buck1_vol[8];
47 u8 buck2_vol[8];
48 u8 buck5_vol[8];
MyungJoo Ham6e0414a2011-06-20 17:30:17 +090049 int buck125_gpios[3];
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +090050 int buck125_gpioindex;
MyungJoo Ham6e0414a2011-06-20 17:30:17 +090051 bool ignore_gpiodvs_side_effect;
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +090052
53 u8 saved_states[MAX8997_REG_MAX];
54};
55
56static inline void max8997_set_gpio(struct max8997_data *max8997)
57{
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +090058 int set3 = (max8997->buck125_gpioindex) & 0x1;
59 int set2 = ((max8997->buck125_gpioindex) >> 1) & 0x1;
60 int set1 = ((max8997->buck125_gpioindex) >> 2) & 0x1;
61
MyungJoo Ham6e0414a2011-06-20 17:30:17 +090062 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);
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +090065}
66
67struct voltage_map_desc {
68 int min;
69 int max;
70 int step;
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +090071};
72
73/* Voltage maps in mV */
74static const struct voltage_map_desc ldo_voltage_map_desc = {
Axel Lin0fa310c2012-04-10 14:22:38 +080075 .min = 800, .max = 3950, .step = 50,
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +090076}; /* LDO1 ~ 18, 21 all */
77
78static const struct voltage_map_desc buck1245_voltage_map_desc = {
Axel Lin0fa310c2012-04-10 14:22:38 +080079 .min = 650, .max = 2225, .step = 25,
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +090080}; /* Buck1, 2, 4, 5 */
81
82static const struct voltage_map_desc buck37_voltage_map_desc = {
Axel Lin0fa310c2012-04-10 14:22:38 +080083 .min = 750, .max = 3900, .step = 50,
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +090084}; /* Buck3, 7 */
85
86/* current map in mA */
87static const struct voltage_map_desc charger_current_map_desc = {
Axel Lin0fa310c2012-04-10 14:22:38 +080088 .min = 200, .max = 950, .step = 50,
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +090089};
90
91static const struct voltage_map_desc topoff_current_map_desc = {
Axel Lin0fa310c2012-04-10 14:22:38 +080092 .min = 50, .max = 200, .step = 10,
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +090093};
94
95static const struct voltage_map_desc *reg_voltage_map[] = {
96 [MAX8997_LDO1] = &ldo_voltage_map_desc,
97 [MAX8997_LDO2] = &ldo_voltage_map_desc,
98 [MAX8997_LDO3] = &ldo_voltage_map_desc,
99 [MAX8997_LDO4] = &ldo_voltage_map_desc,
100 [MAX8997_LDO5] = &ldo_voltage_map_desc,
101 [MAX8997_LDO6] = &ldo_voltage_map_desc,
102 [MAX8997_LDO7] = &ldo_voltage_map_desc,
103 [MAX8997_LDO8] = &ldo_voltage_map_desc,
104 [MAX8997_LDO9] = &ldo_voltage_map_desc,
105 [MAX8997_LDO10] = &ldo_voltage_map_desc,
106 [MAX8997_LDO11] = &ldo_voltage_map_desc,
107 [MAX8997_LDO12] = &ldo_voltage_map_desc,
108 [MAX8997_LDO13] = &ldo_voltage_map_desc,
109 [MAX8997_LDO14] = &ldo_voltage_map_desc,
110 [MAX8997_LDO15] = &ldo_voltage_map_desc,
111 [MAX8997_LDO16] = &ldo_voltage_map_desc,
112 [MAX8997_LDO17] = &ldo_voltage_map_desc,
113 [MAX8997_LDO18] = &ldo_voltage_map_desc,
114 [MAX8997_LDO21] = &ldo_voltage_map_desc,
115 [MAX8997_BUCK1] = &buck1245_voltage_map_desc,
116 [MAX8997_BUCK2] = &buck1245_voltage_map_desc,
117 [MAX8997_BUCK3] = &buck37_voltage_map_desc,
118 [MAX8997_BUCK4] = &buck1245_voltage_map_desc,
119 [MAX8997_BUCK5] = &buck1245_voltage_map_desc,
120 [MAX8997_BUCK6] = NULL,
121 [MAX8997_BUCK7] = &buck37_voltage_map_desc,
122 [MAX8997_EN32KHZ_AP] = NULL,
123 [MAX8997_EN32KHZ_CP] = NULL,
124 [MAX8997_ENVICHG] = NULL,
125 [MAX8997_ESAFEOUT1] = NULL,
126 [MAX8997_ESAFEOUT2] = NULL,
127 [MAX8997_CHARGER_CV] = NULL,
128 [MAX8997_CHARGER] = &charger_current_map_desc,
129 [MAX8997_CHARGER_TOPOFF] = &topoff_current_map_desc,
130};
131
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +0900132static int max8997_list_voltage_safeout(struct regulator_dev *rdev,
133 unsigned int selector)
134{
Axel Linb3e13482012-03-01 09:26:27 +0800135 int rid = rdev_get_id(rdev);
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +0900136
137 if (rid == MAX8997_ESAFEOUT1 || rid == MAX8997_ESAFEOUT2) {
138 switch (selector) {
139 case 0:
140 return 4850000;
141 case 1:
142 return 4900000;
143 case 2:
144 return 4950000;
145 case 3:
146 return 3300000;
147 default:
148 return -EINVAL;
149 }
150 }
151
152 return -EINVAL;
153}
154
155static int max8997_list_voltage_charger_cv(struct regulator_dev *rdev,
156 unsigned int selector)
157{
Axel Linb3e13482012-03-01 09:26:27 +0800158 int rid = rdev_get_id(rdev);
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +0900159
160 if (rid != MAX8997_CHARGER_CV)
161 goto err;
162
163 switch (selector) {
164 case 0x00:
165 return 4200000;
166 case 0x01 ... 0x0E:
167 return 4000000 + 20000 * (selector - 0x01);
168 case 0x0F:
169 return 4350000;
170 default:
171 return -EINVAL;
172 }
173err:
174 return -EINVAL;
175}
176
177static int max8997_list_voltage(struct regulator_dev *rdev,
178 unsigned int selector)
179{
180 const struct voltage_map_desc *desc;
Axel Linb3e13482012-03-01 09:26:27 +0800181 int rid = rdev_get_id(rdev);
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +0900182 int val;
183
184 if (rid >= ARRAY_SIZE(reg_voltage_map) ||
185 rid < 0)
186 return -EINVAL;
187
188 desc = reg_voltage_map[rid];
189 if (desc == NULL)
190 return -EINVAL;
191
192 val = desc->min + desc->step * selector;
193 if (val > desc->max)
194 return -EINVAL;
195
196 return val * 1000;
197}
198
199static int max8997_get_enable_register(struct regulator_dev *rdev,
200 int *reg, int *mask, int *pattern)
201{
Axel Linb3e13482012-03-01 09:26:27 +0800202 int rid = rdev_get_id(rdev);
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +0900203
204 switch (rid) {
205 case MAX8997_LDO1 ... MAX8997_LDO21:
206 *reg = MAX8997_REG_LDO1CTRL + (rid - MAX8997_LDO1);
207 *mask = 0xC0;
208 *pattern = 0xC0;
209 break;
210 case MAX8997_BUCK1:
211 *reg = MAX8997_REG_BUCK1CTRL;
212 *mask = 0x01;
213 *pattern = 0x01;
214 break;
215 case MAX8997_BUCK2:
216 *reg = MAX8997_REG_BUCK2CTRL;
217 *mask = 0x01;
218 *pattern = 0x01;
219 break;
220 case MAX8997_BUCK3:
221 *reg = MAX8997_REG_BUCK3CTRL;
222 *mask = 0x01;
223 *pattern = 0x01;
224 break;
225 case MAX8997_BUCK4:
226 *reg = MAX8997_REG_BUCK4CTRL;
227 *mask = 0x01;
228 *pattern = 0x01;
229 break;
230 case MAX8997_BUCK5:
231 *reg = MAX8997_REG_BUCK5CTRL;
232 *mask = 0x01;
233 *pattern = 0x01;
234 break;
235 case MAX8997_BUCK6:
236 *reg = MAX8997_REG_BUCK6CTRL;
237 *mask = 0x01;
238 *pattern = 0x01;
239 break;
240 case MAX8997_BUCK7:
241 *reg = MAX8997_REG_BUCK7CTRL;
242 *mask = 0x01;
243 *pattern = 0x01;
244 break;
245 case MAX8997_EN32KHZ_AP ... MAX8997_EN32KHZ_CP:
246 *reg = MAX8997_REG_MAINCON1;
247 *mask = 0x01 << (rid - MAX8997_EN32KHZ_AP);
248 *pattern = 0x01 << (rid - MAX8997_EN32KHZ_AP);
249 break;
250 case MAX8997_ENVICHG:
251 *reg = MAX8997_REG_MBCCTRL1;
252 *mask = 0x80;
253 *pattern = 0x80;
254 break;
255 case MAX8997_ESAFEOUT1 ... MAX8997_ESAFEOUT2:
256 *reg = MAX8997_REG_SAFEOUTCTRL;
257 *mask = 0x40 << (rid - MAX8997_ESAFEOUT1);
258 *pattern = 0x40 << (rid - MAX8997_ESAFEOUT1);
259 break;
260 case MAX8997_CHARGER:
261 *reg = MAX8997_REG_MBCCTRL2;
262 *mask = 0x40;
263 *pattern = 0x40;
264 break;
265 default:
266 /* Not controllable or not exists */
267 return -EINVAL;
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +0900268 }
269
270 return 0;
271}
272
273static int max8997_reg_is_enabled(struct regulator_dev *rdev)
274{
275 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
276 struct i2c_client *i2c = max8997->iodev->i2c;
277 int ret, reg, mask, pattern;
278 u8 val;
279
280 ret = max8997_get_enable_register(rdev, &reg, &mask, &pattern);
281 if (ret == -EINVAL)
282 return 1; /* "not controllable" */
283 else if (ret)
284 return ret;
285
286 ret = max8997_read_reg(i2c, reg, &val);
287 if (ret)
288 return ret;
289
290 return (val & mask) == pattern;
291}
292
293static int max8997_reg_enable(struct regulator_dev *rdev)
294{
295 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
296 struct i2c_client *i2c = max8997->iodev->i2c;
297 int ret, reg, mask, pattern;
298
299 ret = max8997_get_enable_register(rdev, &reg, &mask, &pattern);
300 if (ret)
301 return ret;
302
303 return max8997_update_reg(i2c, reg, pattern, mask);
304}
305
306static int max8997_reg_disable(struct regulator_dev *rdev)
307{
308 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
309 struct i2c_client *i2c = max8997->iodev->i2c;
310 int ret, reg, mask, pattern;
311
312 ret = max8997_get_enable_register(rdev, &reg, &mask, &pattern);
313 if (ret)
314 return ret;
315
316 return max8997_update_reg(i2c, reg, ~pattern, mask);
317}
318
319static int max8997_get_voltage_register(struct regulator_dev *rdev,
320 int *_reg, int *_shift, int *_mask)
321{
Axel Lin6f43c382012-03-13 11:22:41 +0800322 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
Axel Linb3e13482012-03-01 09:26:27 +0800323 int rid = rdev_get_id(rdev);
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +0900324 int reg, shift = 0, mask = 0x3f;
325
326 switch (rid) {
327 case MAX8997_LDO1 ... MAX8997_LDO21:
328 reg = MAX8997_REG_LDO1CTRL + (rid - MAX8997_LDO1);
329 break;
330 case MAX8997_BUCK1:
331 reg = MAX8997_REG_BUCK1DVS1;
Axel Lin6f43c382012-03-13 11:22:41 +0800332 if (max8997->buck1_gpiodvs)
333 reg += max8997->buck125_gpioindex;
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +0900334 break;
335 case MAX8997_BUCK2:
336 reg = MAX8997_REG_BUCK2DVS1;
Axel Lin6f43c382012-03-13 11:22:41 +0800337 if (max8997->buck2_gpiodvs)
338 reg += max8997->buck125_gpioindex;
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +0900339 break;
340 case MAX8997_BUCK3:
341 reg = MAX8997_REG_BUCK3DVS;
342 break;
343 case MAX8997_BUCK4:
344 reg = MAX8997_REG_BUCK4DVS;
345 break;
346 case MAX8997_BUCK5:
347 reg = MAX8997_REG_BUCK5DVS1;
Axel Lin6f43c382012-03-13 11:22:41 +0800348 if (max8997->buck5_gpiodvs)
349 reg += max8997->buck125_gpioindex;
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +0900350 break;
351 case MAX8997_BUCK7:
352 reg = MAX8997_REG_BUCK7DVS;
353 break;
354 case MAX8997_ESAFEOUT1 ... MAX8997_ESAFEOUT2:
355 reg = MAX8997_REG_SAFEOUTCTRL;
356 shift = (rid == MAX8997_ESAFEOUT2) ? 2 : 0;
357 mask = 0x3;
358 break;
359 case MAX8997_CHARGER_CV:
360 reg = MAX8997_REG_MBCCTRL3;
361 shift = 0;
362 mask = 0xf;
363 break;
364 case MAX8997_CHARGER:
365 reg = MAX8997_REG_MBCCTRL4;
366 shift = 0;
367 mask = 0xf;
368 break;
369 case MAX8997_CHARGER_TOPOFF:
370 reg = MAX8997_REG_MBCCTRL5;
371 shift = 0;
372 mask = 0xf;
373 break;
374 default:
375 return -EINVAL;
376 }
377
378 *_reg = reg;
379 *_shift = shift;
380 *_mask = mask;
381
382 return 0;
383}
384
385static int max8997_get_voltage(struct regulator_dev *rdev)
386{
387 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +0900388 struct i2c_client *i2c = max8997->iodev->i2c;
389 int reg, shift, mask, ret;
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +0900390 u8 val;
391
392 ret = max8997_get_voltage_register(rdev, &reg, &shift, &mask);
393 if (ret)
394 return ret;
395
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +0900396 ret = max8997_read_reg(i2c, reg, &val);
397 if (ret)
398 return ret;
399
400 val >>= shift;
401 val &= mask;
402
403 if (rdev->desc && rdev->desc->ops && rdev->desc->ops->list_voltage)
404 return rdev->desc->ops->list_voltage(rdev, val);
405
406 /*
407 * max8997_list_voltage returns value for any rdev with voltage_map,
408 * which works for "CHARGER" and "CHARGER TOPOFF" that do not have
409 * list_voltage ops (they are current regulators).
410 */
411 return max8997_list_voltage(rdev, val);
412}
413
414static inline int max8997_get_voltage_proper_val(
415 const struct voltage_map_desc *desc,
416 int min_vol, int max_vol)
417{
Axel Lin2358b772012-04-10 14:20:03 +0800418 int i;
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +0900419
420 if (desc == NULL)
421 return -EINVAL;
422
423 if (max_vol < desc->min || min_vol > desc->max)
424 return -EINVAL;
425
Axel Lin2358b772012-04-10 14:20:03 +0800426 if (min_vol < desc->min)
427 min_vol = desc->min;
428
429 i = DIV_ROUND_UP(min_vol - desc->min, desc->step);
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +0900430
431 if (desc->min + desc->step * i > max_vol)
432 return -EINVAL;
433
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +0900434 return i;
435}
436
437static int max8997_set_voltage_charger_cv(struct regulator_dev *rdev,
438 int min_uV, int max_uV, unsigned *selector)
439{
440 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
441 struct i2c_client *i2c = max8997->iodev->i2c;
Axel Linb3e13482012-03-01 09:26:27 +0800442 int rid = rdev_get_id(rdev);
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +0900443 int lb, ub;
444 int reg, shift = 0, mask, ret = 0;
445 u8 val = 0x0;
446
447 if (rid != MAX8997_CHARGER_CV)
448 return -EINVAL;
449
450 ret = max8997_get_voltage_register(rdev, &reg, &shift, &mask);
451 if (ret)
452 return ret;
453
454 if (max_uV < 4000000 || min_uV > 4350000)
455 return -EINVAL;
456
457 if (min_uV <= 4000000) {
458 if (max_uV >= 4000000)
459 return -EINVAL;
460 else
461 val = 0x1;
462 } else if (min_uV <= 4200000 && max_uV >= 4200000)
463 val = 0x0;
464 else {
465 lb = (min_uV - 4000001) / 20000 + 2;
466 ub = (max_uV - 4000000) / 20000 + 1;
467
468 if (lb > ub)
469 return -EINVAL;
470
471 if (lb < 0xf)
472 val = lb;
473 else {
474 if (ub >= 0xf)
475 val = 0xf;
476 else
477 return -EINVAL;
478 }
479 }
480
481 *selector = val;
482
483 ret = max8997_update_reg(i2c, reg, val << shift, mask);
484
485 return ret;
486}
487
488/*
489 * For LDO1 ~ LDO21, BUCK1~5, BUCK7, CHARGER, CHARGER_TOPOFF
490 * BUCK1, 2, and 5 are available if they are not controlled by gpio
491 */
492static int max8997_set_voltage_ldobuck(struct regulator_dev *rdev,
493 int min_uV, int max_uV, unsigned *selector)
494{
495 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
496 struct i2c_client *i2c = max8997->iodev->i2c;
497 int min_vol = min_uV / 1000, max_vol = max_uV / 1000;
498 const struct voltage_map_desc *desc;
Axel Linb3e13482012-03-01 09:26:27 +0800499 int rid = rdev_get_id(rdev);
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +0900500 int reg, shift = 0, mask, ret;
501 int i;
502 u8 org;
503
504 switch (rid) {
505 case MAX8997_LDO1 ... MAX8997_LDO21:
506 break;
507 case MAX8997_BUCK1 ... MAX8997_BUCK5:
508 break;
509 case MAX8997_BUCK6:
510 return -EINVAL;
511 case MAX8997_BUCK7:
512 break;
513 case MAX8997_CHARGER:
514 break;
515 case MAX8997_CHARGER_TOPOFF:
516 break;
517 default:
518 return -EINVAL;
519 }
520
521 desc = reg_voltage_map[rid];
522
523 i = max8997_get_voltage_proper_val(desc, min_vol, max_vol);
524 if (i < 0)
525 return i;
526
527 ret = max8997_get_voltage_register(rdev, &reg, &shift, &mask);
528 if (ret)
529 return ret;
530
531 max8997_read_reg(i2c, reg, &org);
532 org = (org & mask) >> shift;
533
534 ret = max8997_update_reg(i2c, reg, i << shift, mask << shift);
535 *selector = i;
536
537 if (rid == MAX8997_BUCK1 || rid == MAX8997_BUCK2 ||
538 rid == MAX8997_BUCK4 || rid == MAX8997_BUCK5) {
539 /* If the voltage is increasing */
540 if (org < i)
Donggeun Kim6ff325a2011-07-07 16:51:56 +0900541 udelay(DIV_ROUND_UP(desc->step * (i - org),
542 max8997->ramp_delay));
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +0900543 }
544
545 return ret;
546}
547
548/*
549 * Assess the damage on the voltage setting of BUCK1,2,5 by the change.
550 *
551 * When GPIO-DVS mode is used for multiple bucks, changing the voltage value
552 * of one of the bucks may affect that of another buck, which is the side
553 * effect of the change (set_voltage). This function examines the GPIO-DVS
554 * configurations and checks whether such side-effect exists.
555 */
556static int max8997_assess_side_effect(struct regulator_dev *rdev,
557 u8 new_val, int *best)
558{
559 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
Axel Linb3e13482012-03-01 09:26:27 +0800560 int rid = rdev_get_id(rdev);
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +0900561 u8 *buckx_val[3];
562 bool buckx_gpiodvs[3];
563 int side_effect[8];
564 int min_side_effect = INT_MAX;
565 int i;
566
567 *best = -1;
568
569 switch (rid) {
570 case MAX8997_BUCK1:
571 rid = 0;
572 break;
573 case MAX8997_BUCK2:
574 rid = 1;
575 break;
576 case MAX8997_BUCK5:
577 rid = 2;
578 break;
579 default:
580 return -EINVAL;
581 }
582
583 buckx_val[0] = max8997->buck1_vol;
584 buckx_val[1] = max8997->buck2_vol;
585 buckx_val[2] = max8997->buck5_vol;
MyungJoo Ham6e0414a2011-06-20 17:30:17 +0900586 buckx_gpiodvs[0] = max8997->buck1_gpiodvs;
587 buckx_gpiodvs[1] = max8997->buck2_gpiodvs;
588 buckx_gpiodvs[2] = max8997->buck5_gpiodvs;
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +0900589
590 for (i = 0; i < 8; i++) {
591 int others;
592
593 if (new_val != (buckx_val[rid])[i]) {
594 side_effect[i] = -1;
595 continue;
596 }
597
598 side_effect[i] = 0;
599 for (others = 0; others < 3; others++) {
600 int diff;
601
602 if (others == rid)
603 continue;
604 if (buckx_gpiodvs[others] == false)
605 continue; /* Not affected */
606 diff = (buckx_val[others])[i] -
607 (buckx_val[others])[max8997->buck125_gpioindex];
608 if (diff > 0)
609 side_effect[i] += diff;
610 else if (diff < 0)
611 side_effect[i] -= diff;
612 }
613 if (side_effect[i] == 0) {
614 *best = i;
615 return 0; /* NO SIDE EFFECT! Use This! */
616 }
617 if (side_effect[i] < min_side_effect) {
618 min_side_effect = side_effect[i];
619 *best = i;
620 }
621 }
622
623 if (*best == -1)
624 return -EINVAL;
625
626 return side_effect[*best];
627}
628
629/*
630 * For Buck 1 ~ 5 and 7. If it is not controlled by GPIO, this calls
631 * max8997_set_voltage_ldobuck to do the job.
632 */
633static int max8997_set_voltage_buck(struct regulator_dev *rdev,
634 int min_uV, int max_uV, unsigned *selector)
635{
636 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
Axel Linb3e13482012-03-01 09:26:27 +0800637 int rid = rdev_get_id(rdev);
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +0900638 const struct voltage_map_desc *desc;
639 int new_val, new_idx, damage, tmp_val, tmp_idx, tmp_dmg;
640 bool gpio_dvs_mode = false;
641 int min_vol = min_uV / 1000, max_vol = max_uV / 1000;
642
643 if (rid < MAX8997_BUCK1 || rid > MAX8997_BUCK7)
644 return -EINVAL;
645
646 switch (rid) {
647 case MAX8997_BUCK1:
MyungJoo Ham6e0414a2011-06-20 17:30:17 +0900648 if (max8997->buck1_gpiodvs)
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +0900649 gpio_dvs_mode = true;
650 break;
651 case MAX8997_BUCK2:
MyungJoo Ham6e0414a2011-06-20 17:30:17 +0900652 if (max8997->buck2_gpiodvs)
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +0900653 gpio_dvs_mode = true;
654 break;
655 case MAX8997_BUCK5:
MyungJoo Ham6e0414a2011-06-20 17:30:17 +0900656 if (max8997->buck5_gpiodvs)
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +0900657 gpio_dvs_mode = true;
658 break;
659 }
660
661 if (!gpio_dvs_mode)
662 return max8997_set_voltage_ldobuck(rdev, min_uV, max_uV,
663 selector);
664
665 desc = reg_voltage_map[rid];
666 new_val = max8997_get_voltage_proper_val(desc, min_vol, max_vol);
667 if (new_val < 0)
668 return new_val;
669
670 tmp_dmg = INT_MAX;
671 tmp_idx = -1;
672 tmp_val = -1;
673 do {
674 damage = max8997_assess_side_effect(rdev, new_val, &new_idx);
675 if (damage == 0)
676 goto out;
677
678 if (tmp_dmg > damage) {
679 tmp_idx = new_idx;
680 tmp_val = new_val;
681 tmp_dmg = damage;
682 }
683
684 new_val++;
685 } while (desc->min + desc->step + new_val <= desc->max);
686
687 new_idx = tmp_idx;
688 new_val = tmp_val;
689
MyungJoo Ham6e0414a2011-06-20 17:30:17 +0900690 if (max8997->ignore_gpiodvs_side_effect == false)
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +0900691 return -EINVAL;
692
693 dev_warn(&rdev->dev, "MAX8997 GPIO-DVS Side Effect Warning: GPIO SET:"
694 " %d -> %d\n", max8997->buck125_gpioindex, tmp_idx);
695
696out:
697 if (new_idx < 0 || new_val < 0)
698 return -EINVAL;
699
700 max8997->buck125_gpioindex = new_idx;
701 max8997_set_gpio(max8997);
702 *selector = new_val;
703
704 return 0;
705}
706
707static const int safeoutvolt[] = {
708 3300000,
709 4850000,
710 4900000,
711 4950000,
712};
713
714/* For SAFEOUT1 and SAFEOUT2 */
715static int max8997_set_voltage_safeout(struct regulator_dev *rdev,
716 int min_uV, int max_uV, unsigned *selector)
717{
718 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
719 struct i2c_client *i2c = max8997->iodev->i2c;
Axel Linb3e13482012-03-01 09:26:27 +0800720 int rid = rdev_get_id(rdev);
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +0900721 int reg, shift = 0, mask, ret;
722 int i = 0;
723 u8 val;
724
725 if (rid != MAX8997_ESAFEOUT1 && rid != MAX8997_ESAFEOUT2)
726 return -EINVAL;
727
728 for (i = 0; i < ARRAY_SIZE(safeoutvolt); i++) {
729 if (min_uV <= safeoutvolt[i] &&
730 max_uV >= safeoutvolt[i])
731 break;
732 }
733
734 if (i >= ARRAY_SIZE(safeoutvolt))
735 return -EINVAL;
736
737 if (i == 0)
738 val = 0x3;
739 else
740 val = i - 1;
741
742 ret = max8997_get_voltage_register(rdev, &reg, &shift, &mask);
743 if (ret)
744 return ret;
745
746 ret = max8997_update_reg(i2c, reg, val << shift, mask << shift);
747 *selector = val;
748
749 return ret;
750}
751
752static int max8997_reg_enable_suspend(struct regulator_dev *rdev)
753{
754 return 0;
755}
756
757static int max8997_reg_disable_suspend(struct regulator_dev *rdev)
758{
759 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
760 struct i2c_client *i2c = max8997->iodev->i2c;
761 int ret, reg, mask, pattern;
Axel Linb3e13482012-03-01 09:26:27 +0800762 int rid = rdev_get_id(rdev);
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +0900763
764 ret = max8997_get_enable_register(rdev, &reg, &mask, &pattern);
765 if (ret)
766 return ret;
767
768 max8997_read_reg(i2c, reg, &max8997->saved_states[rid]);
769
770 if (rid == MAX8997_LDO1 ||
771 rid == MAX8997_LDO10 ||
772 rid == MAX8997_LDO21) {
773 dev_dbg(&rdev->dev, "Conditional Power-Off for %s\n",
774 rdev->desc->name);
775 return max8997_update_reg(i2c, reg, 0x40, mask);
776 }
777
778 dev_dbg(&rdev->dev, "Full Power-Off for %s (%xh -> %xh)\n",
779 rdev->desc->name, max8997->saved_states[rid] & mask,
780 (~pattern) & mask);
781 return max8997_update_reg(i2c, reg, ~pattern, mask);
782}
783
784static struct regulator_ops max8997_ldo_ops = {
785 .list_voltage = max8997_list_voltage,
786 .is_enabled = max8997_reg_is_enabled,
787 .enable = max8997_reg_enable,
788 .disable = max8997_reg_disable,
789 .get_voltage = max8997_get_voltage,
790 .set_voltage = max8997_set_voltage_ldobuck,
791 .set_suspend_enable = max8997_reg_enable_suspend,
792 .set_suspend_disable = max8997_reg_disable_suspend,
793};
794
795static struct regulator_ops max8997_buck_ops = {
796 .list_voltage = max8997_list_voltage,
797 .is_enabled = max8997_reg_is_enabled,
798 .enable = max8997_reg_enable,
799 .disable = max8997_reg_disable,
800 .get_voltage = max8997_get_voltage,
801 .set_voltage = max8997_set_voltage_buck,
802 .set_suspend_enable = max8997_reg_enable_suspend,
803 .set_suspend_disable = max8997_reg_disable_suspend,
804};
805
806static struct regulator_ops max8997_fixedvolt_ops = {
807 .list_voltage = max8997_list_voltage,
808 .is_enabled = max8997_reg_is_enabled,
809 .enable = max8997_reg_enable,
810 .disable = max8997_reg_disable,
811 .set_suspend_enable = max8997_reg_enable_suspend,
812 .set_suspend_disable = max8997_reg_disable_suspend,
813};
814
815static struct regulator_ops max8997_safeout_ops = {
816 .list_voltage = max8997_list_voltage_safeout,
817 .is_enabled = max8997_reg_is_enabled,
818 .enable = max8997_reg_enable,
819 .disable = max8997_reg_disable,
820 .get_voltage = max8997_get_voltage,
821 .set_voltage = max8997_set_voltage_safeout,
822 .set_suspend_enable = max8997_reg_enable_suspend,
823 .set_suspend_disable = max8997_reg_disable_suspend,
824};
825
826static struct regulator_ops max8997_fixedstate_ops = {
827 .list_voltage = max8997_list_voltage_charger_cv,
828 .get_voltage = max8997_get_voltage,
829 .set_voltage = max8997_set_voltage_charger_cv,
830};
831
832static int max8997_set_voltage_ldobuck_wrap(struct regulator_dev *rdev,
833 int min_uV, int max_uV)
834{
835 unsigned dummy;
836
837 return max8997_set_voltage_ldobuck(rdev, min_uV, max_uV, &dummy);
838}
839
840
841static struct regulator_ops max8997_charger_ops = {
842 .is_enabled = max8997_reg_is_enabled,
843 .enable = max8997_reg_enable,
844 .disable = max8997_reg_disable,
845 .get_current_limit = max8997_get_voltage,
846 .set_current_limit = max8997_set_voltage_ldobuck_wrap,
847};
848
849static struct regulator_ops max8997_charger_fixedstate_ops = {
850 .is_enabled = max8997_reg_is_enabled,
851 .get_current_limit = max8997_get_voltage,
852 .set_current_limit = max8997_set_voltage_ldobuck_wrap,
853};
854
Axel Lin4533f802012-03-13 14:53:58 +0800855#define MAX8997_VOLTAGE_REGULATOR(_name, _ops) {\
856 .name = #_name, \
857 .id = MAX8997_##_name, \
858 .ops = &_ops, \
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +0900859 .type = REGULATOR_VOLTAGE, \
860 .owner = THIS_MODULE, \
861}
862
Axel Lin4533f802012-03-13 14:53:58 +0800863#define MAX8997_CURRENT_REGULATOR(_name, _ops) {\
864 .name = #_name, \
865 .id = MAX8997_##_name, \
866 .ops = &_ops, \
867 .type = REGULATOR_CURRENT, \
868 .owner = THIS_MODULE, \
869}
870
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +0900871static struct regulator_desc regulators[] = {
Axel Lin4533f802012-03-13 14:53:58 +0800872 MAX8997_VOLTAGE_REGULATOR(LDO1, max8997_ldo_ops),
873 MAX8997_VOLTAGE_REGULATOR(LDO2, max8997_ldo_ops),
874 MAX8997_VOLTAGE_REGULATOR(LDO3, max8997_ldo_ops),
875 MAX8997_VOLTAGE_REGULATOR(LDO4, max8997_ldo_ops),
876 MAX8997_VOLTAGE_REGULATOR(LDO5, max8997_ldo_ops),
877 MAX8997_VOLTAGE_REGULATOR(LDO6, max8997_ldo_ops),
878 MAX8997_VOLTAGE_REGULATOR(LDO7, max8997_ldo_ops),
879 MAX8997_VOLTAGE_REGULATOR(LDO8, max8997_ldo_ops),
880 MAX8997_VOLTAGE_REGULATOR(LDO9, max8997_ldo_ops),
881 MAX8997_VOLTAGE_REGULATOR(LDO10, max8997_ldo_ops),
882 MAX8997_VOLTAGE_REGULATOR(LDO11, max8997_ldo_ops),
883 MAX8997_VOLTAGE_REGULATOR(LDO12, max8997_ldo_ops),
884 MAX8997_VOLTAGE_REGULATOR(LDO13, max8997_ldo_ops),
885 MAX8997_VOLTAGE_REGULATOR(LDO14, max8997_ldo_ops),
886 MAX8997_VOLTAGE_REGULATOR(LDO15, max8997_ldo_ops),
887 MAX8997_VOLTAGE_REGULATOR(LDO16, max8997_ldo_ops),
888 MAX8997_VOLTAGE_REGULATOR(LDO17, max8997_ldo_ops),
889 MAX8997_VOLTAGE_REGULATOR(LDO18, max8997_ldo_ops),
890 MAX8997_VOLTAGE_REGULATOR(LDO21, max8997_ldo_ops),
891 MAX8997_VOLTAGE_REGULATOR(BUCK1, max8997_buck_ops),
892 MAX8997_VOLTAGE_REGULATOR(BUCK2, max8997_buck_ops),
893 MAX8997_VOLTAGE_REGULATOR(BUCK3, max8997_buck_ops),
894 MAX8997_VOLTAGE_REGULATOR(BUCK4, max8997_buck_ops),
895 MAX8997_VOLTAGE_REGULATOR(BUCK5, max8997_buck_ops),
896 MAX8997_VOLTAGE_REGULATOR(BUCK6, max8997_fixedvolt_ops),
897 MAX8997_VOLTAGE_REGULATOR(BUCK7, max8997_buck_ops),
898 MAX8997_VOLTAGE_REGULATOR(EN32KHZ_AP, max8997_fixedvolt_ops),
899 MAX8997_VOLTAGE_REGULATOR(EN32KHZ_CP, max8997_fixedvolt_ops),
900 MAX8997_VOLTAGE_REGULATOR(ENVICHG, max8997_fixedvolt_ops),
901 MAX8997_VOLTAGE_REGULATOR(ESAFEOUT1, max8997_safeout_ops),
902 MAX8997_VOLTAGE_REGULATOR(ESAFEOUT2, max8997_safeout_ops),
903 MAX8997_VOLTAGE_REGULATOR(CHARGER_CV, max8997_fixedstate_ops),
904 MAX8997_CURRENT_REGULATOR(CHARGER, max8997_charger_ops),
905 MAX8997_CURRENT_REGULATOR(CHARGER_TOPOFF,
906 max8997_charger_fixedstate_ops),
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +0900907};
908
909static __devinit int max8997_pmic_probe(struct platform_device *pdev)
910{
911 struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent);
912 struct max8997_platform_data *pdata = dev_get_platdata(iodev->dev);
Mark Brownc1727082012-04-04 00:50:22 +0100913 struct regulator_config config = { };
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +0900914 struct regulator_dev **rdev;
915 struct max8997_data *max8997;
916 struct i2c_client *i2c;
917 int i, ret, size;
918 u8 max_buck1 = 0, max_buck2 = 0, max_buck5 = 0;
919
920 if (!pdata) {
921 dev_err(pdev->dev.parent, "No platform init data supplied.\n");
922 return -ENODEV;
923 }
924
925 max8997 = kzalloc(sizeof(struct max8997_data), GFP_KERNEL);
926 if (!max8997)
927 return -ENOMEM;
928
929 size = sizeof(struct regulator_dev *) * pdata->num_regulators;
930 max8997->rdev = kzalloc(size, GFP_KERNEL);
931 if (!max8997->rdev) {
932 kfree(max8997);
933 return -ENOMEM;
934 }
935
936 rdev = max8997->rdev;
937 max8997->dev = &pdev->dev;
938 max8997->iodev = iodev;
939 max8997->num_regulators = pdata->num_regulators;
940 platform_set_drvdata(pdev, max8997);
941 i2c = max8997->iodev->i2c;
942
943 max8997->buck125_gpioindex = pdata->buck125_default_idx;
MyungJoo Ham6e0414a2011-06-20 17:30:17 +0900944 max8997->buck1_gpiodvs = pdata->buck1_gpiodvs;
945 max8997->buck2_gpiodvs = pdata->buck2_gpiodvs;
946 max8997->buck5_gpiodvs = pdata->buck5_gpiodvs;
947 memcpy(max8997->buck125_gpios, pdata->buck125_gpios, sizeof(int) * 3);
948 max8997->ignore_gpiodvs_side_effect = pdata->ignore_gpiodvs_side_effect;
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +0900949
950 for (i = 0; i < 8; i++) {
951 max8997->buck1_vol[i] = ret =
952 max8997_get_voltage_proper_val(
953 &buck1245_voltage_map_desc,
954 pdata->buck1_voltage[i] / 1000,
955 pdata->buck1_voltage[i] / 1000 +
956 buck1245_voltage_map_desc.step);
957 if (ret < 0)
958 goto err_alloc;
959
960 max8997->buck2_vol[i] = ret =
961 max8997_get_voltage_proper_val(
962 &buck1245_voltage_map_desc,
963 pdata->buck2_voltage[i] / 1000,
964 pdata->buck2_voltage[i] / 1000 +
965 buck1245_voltage_map_desc.step);
966 if (ret < 0)
967 goto err_alloc;
968
969 max8997->buck5_vol[i] = ret =
970 max8997_get_voltage_proper_val(
971 &buck1245_voltage_map_desc,
972 pdata->buck5_voltage[i] / 1000,
973 pdata->buck5_voltage[i] / 1000 +
974 buck1245_voltage_map_desc.step);
975 if (ret < 0)
976 goto err_alloc;
977
978 if (max_buck1 < max8997->buck1_vol[i])
979 max_buck1 = max8997->buck1_vol[i];
980 if (max_buck2 < max8997->buck2_vol[i])
981 max_buck2 = max8997->buck2_vol[i];
982 if (max_buck5 < max8997->buck5_vol[i])
983 max_buck5 = max8997->buck5_vol[i];
984 }
985
986 /* For the safety, set max voltage before setting up */
987 for (i = 0; i < 8; i++) {
Axel Linecb9c4f2011-05-16 18:20:34 +0800988 max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i,
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +0900989 max_buck1, 0x3f);
Axel Linecb9c4f2011-05-16 18:20:34 +0800990 max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i,
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +0900991 max_buck2, 0x3f);
Axel Linecb9c4f2011-05-16 18:20:34 +0800992 max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i,
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +0900993 max_buck5, 0x3f);
994 }
995
996 /*
997 * If buck 1, 2, and 5 do not care DVS GPIO settings, ignore them.
998 * If at least one of them cares, set gpios.
999 */
1000 if (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs ||
1001 pdata->buck5_gpiodvs) {
1002 bool gpio1set = false, gpio2set = false;
1003
1004 if (!gpio_is_valid(pdata->buck125_gpios[0]) ||
1005 !gpio_is_valid(pdata->buck125_gpios[1]) ||
1006 !gpio_is_valid(pdata->buck125_gpios[2])) {
1007 dev_err(&pdev->dev, "GPIO NOT VALID\n");
1008 ret = -EINVAL;
1009 goto err_alloc;
1010 }
1011
1012 ret = gpio_request(pdata->buck125_gpios[0],
1013 "MAX8997 SET1");
1014 if (ret == -EBUSY)
1015 dev_warn(&pdev->dev, "Duplicated gpio request"
1016 " on SET1\n");
1017 else if (ret)
1018 goto err_alloc;
1019 else
1020 gpio1set = true;
1021
1022 ret = gpio_request(pdata->buck125_gpios[1],
1023 "MAX8997 SET2");
1024 if (ret == -EBUSY)
1025 dev_warn(&pdev->dev, "Duplicated gpio request"
1026 " on SET2\n");
1027 else if (ret) {
1028 if (gpio1set)
1029 gpio_free(pdata->buck125_gpios[0]);
1030 goto err_alloc;
1031 } else
1032 gpio2set = true;
1033
1034 ret = gpio_request(pdata->buck125_gpios[2],
1035 "MAX8997 SET3");
1036 if (ret == -EBUSY)
1037 dev_warn(&pdev->dev, "Duplicated gpio request"
1038 " on SET3\n");
1039 else if (ret) {
1040 if (gpio1set)
1041 gpio_free(pdata->buck125_gpios[0]);
1042 if (gpio2set)
1043 gpio_free(pdata->buck125_gpios[1]);
1044 goto err_alloc;
1045 }
1046
1047 gpio_direction_output(pdata->buck125_gpios[0],
1048 (max8997->buck125_gpioindex >> 2)
1049 & 0x1); /* SET1 */
1050 gpio_direction_output(pdata->buck125_gpios[1],
1051 (max8997->buck125_gpioindex >> 1)
1052 & 0x1); /* SET2 */
1053 gpio_direction_output(pdata->buck125_gpios[2],
1054 (max8997->buck125_gpioindex >> 0)
1055 & 0x1); /* SET3 */
1056 ret = 0;
1057 }
1058
1059 /* DVS-GPIO disabled */
1060 max8997_update_reg(i2c, MAX8997_REG_BUCK1CTRL, (pdata->buck1_gpiodvs) ?
1061 (1 << 1) : (0 << 1), 1 << 1);
1062 max8997_update_reg(i2c, MAX8997_REG_BUCK2CTRL, (pdata->buck2_gpiodvs) ?
1063 (1 << 1) : (0 << 1), 1 << 1);
1064 max8997_update_reg(i2c, MAX8997_REG_BUCK5CTRL, (pdata->buck5_gpiodvs) ?
1065 (1 << 1) : (0 << 1), 1 << 1);
1066
1067 /* Initialize all the DVS related BUCK registers */
1068 for (i = 0; i < 8; i++) {
Axel Linecb9c4f2011-05-16 18:20:34 +08001069 max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i,
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +09001070 max8997->buck1_vol[i],
1071 0x3f);
Axel Linecb9c4f2011-05-16 18:20:34 +08001072 max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i,
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +09001073 max8997->buck2_vol[i],
1074 0x3f);
Axel Linecb9c4f2011-05-16 18:20:34 +08001075 max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i,
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +09001076 max8997->buck5_vol[i],
1077 0x3f);
1078 }
1079
Tushar Beheradbb48e72011-06-21 09:08:59 +05301080 /* Misc Settings */
1081 max8997->ramp_delay = 10; /* set 10mV/us, which is the default */
1082 max8997_write_reg(i2c, MAX8997_REG_BUCKRAMP, (0xf << 4) | 0x9);
1083
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +09001084 for (i = 0; i < pdata->num_regulators; i++) {
1085 const struct voltage_map_desc *desc;
1086 int id = pdata->regulators[i].id;
1087
1088 desc = reg_voltage_map[id];
1089 if (desc)
1090 regulators[id].n_voltages =
1091 (desc->max - desc->min) / desc->step + 1;
1092 else if (id == MAX8997_ESAFEOUT1 || id == MAX8997_ESAFEOUT2)
1093 regulators[id].n_voltages = 4;
1094 else if (id == MAX8997_CHARGER_CV)
1095 regulators[id].n_voltages = 16;
1096
Mark Brownc1727082012-04-04 00:50:22 +01001097 config.dev = max8997->dev;
1098 config.init_data = pdata->regulators[i].initdata;
1099 config.driver_data = max8997;
1100
1101 rdev[i] = regulator_register(&regulators[id], &config);
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +09001102 if (IS_ERR(rdev[i])) {
1103 ret = PTR_ERR(rdev[i]);
1104 dev_err(max8997->dev, "regulator init failed for %d\n",
1105 id);
1106 rdev[i] = NULL;
1107 goto err;
1108 }
1109 }
1110
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +09001111 return 0;
1112err:
1113 for (i = 0; i < max8997->num_regulators; i++)
1114 if (rdev[i])
1115 regulator_unregister(rdev[i]);
1116err_alloc:
1117 kfree(max8997->rdev);
1118 kfree(max8997);
1119
1120 return ret;
1121}
1122
1123static int __devexit max8997_pmic_remove(struct platform_device *pdev)
1124{
1125 struct max8997_data *max8997 = platform_get_drvdata(pdev);
1126 struct regulator_dev **rdev = max8997->rdev;
1127 int i;
1128
1129 for (i = 0; i < max8997->num_regulators; i++)
1130 if (rdev[i])
1131 regulator_unregister(rdev[i]);
1132
1133 kfree(max8997->rdev);
1134 kfree(max8997);
1135
1136 return 0;
1137}
1138
1139static const struct platform_device_id max8997_pmic_id[] = {
1140 { "max8997-pmic", 0},
1141 { },
1142};
Axel Lina51b9072011-03-26 23:28:42 +08001143MODULE_DEVICE_TABLE(platform, max8997_pmic_id);
MyungJoo Hambd6ca2c2011-03-11 11:34:44 +09001144
1145static struct platform_driver max8997_pmic_driver = {
1146 .driver = {
1147 .name = "max8997-pmic",
1148 .owner = THIS_MODULE,
1149 },
1150 .probe = max8997_pmic_probe,
1151 .remove = __devexit_p(max8997_pmic_remove),
1152 .id_table = max8997_pmic_id,
1153};
1154
1155static int __init max8997_pmic_init(void)
1156{
1157 return platform_driver_register(&max8997_pmic_driver);
1158}
1159subsys_initcall(max8997_pmic_init);
1160
1161static void __exit max8997_pmic_cleanup(void)
1162{
1163 platform_driver_unregister(&max8997_pmic_driver);
1164}
1165module_exit(max8997_pmic_cleanup);
1166
1167MODULE_DESCRIPTION("MAXIM 8997/8966 Regulator Driver");
1168MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
1169MODULE_LICENSE("GPL");