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drivers/leds: add driver for PCA9633 I2C chip
[deliverable/linux.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{
b3e1348e 323 int rid = rdev_get_id(rdev);
bd6ca2cf
MH		 324 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;
332 break;
333 case MAX8997_BUCK2:
334 reg = MAX8997_REG_BUCK2DVS1;
335 break;
336 case MAX8997_BUCK3:
337 reg = MAX8997_REG_BUCK3DVS;
338 break;
339 case MAX8997_BUCK4:
340 reg = MAX8997_REG_BUCK4DVS;
341 break;
342 case MAX8997_BUCK5:
343 reg = MAX8997_REG_BUCK5DVS1;
344 break;
345 case MAX8997_BUCK7:
346 reg = MAX8997_REG_BUCK7DVS;
347 break;
348 case MAX8997_ESAFEOUT1 ... MAX8997_ESAFEOUT2:
349 reg = MAX8997_REG_SAFEOUTCTRL;
350 shift = (rid == MAX8997_ESAFEOUT2) ? 2 : 0;
351 mask = 0x3;
352 break;
353 case MAX8997_CHARGER_CV:
354 reg = MAX8997_REG_MBCCTRL3;
355 shift = 0;
356 mask = 0xf;
357 break;
358 case MAX8997_CHARGER:
359 reg = MAX8997_REG_MBCCTRL4;
360 shift = 0;
361 mask = 0xf;
362 break;
363 case MAX8997_CHARGER_TOPOFF:
364 reg = MAX8997_REG_MBCCTRL5;
365 shift = 0;
366 mask = 0xf;
367 break;
368 default:
369 return -EINVAL;
370 }
371
372 *_reg = reg;
373 *_shift = shift;
374 *_mask = mask;
375
376 return 0;
377}
378
379static int max8997_get_voltage(struct regulator_dev *rdev)
380{
381 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
bd6ca2cf
MH		 382 struct i2c_client *i2c = max8997->iodev->i2c;
383 int reg, shift, mask, ret;
b3e1348e 384 int rid = rdev_get_id(rdev);
bd6ca2cf
MH		 385 u8 val;
386
387 ret = max8997_get_voltage_register(rdev, &reg, &shift, &mask);
388 if (ret)
389 return ret;
390
6e0414a5
MH		 391 if ((rid == MAX8997_BUCK1 && max8997->buck1_gpiodvs) ||
392 (rid == MAX8997_BUCK2 && max8997->buck2_gpiodvs) ||
393 (rid == MAX8997_BUCK5 && max8997->buck5_gpiodvs))
bd6ca2cf
MH		 394 reg += max8997->buck125_gpioindex;
395
396 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{
418 int i = 0;
419
420 if (desc == NULL)
421 return -EINVAL;
422
423 if (max_vol < desc->min || min_vol > desc->max)
424 return -EINVAL;
425
426 while (desc->min + desc->step * i < min_vol &&
427 desc->min + desc->step * i < desc->max)
428 i++;
429
430 if (desc->min + desc->step * i > max_vol)
431 return -EINVAL;
432
433 if (i >= (1 << desc->n_bits))
434 return -EINVAL;
435
436 return i;
437}
438
439static int max8997_set_voltage_charger_cv(struct regulator_dev *rdev,
440 int min_uV, int max_uV, unsigned *selector)
441{
442 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
443 struct i2c_client *i2c = max8997->iodev->i2c;
b3e1348e 444 int rid = rdev_get_id(rdev);
bd6ca2cf
MH		 445 int lb, ub;
446 int reg, shift = 0, mask, ret = 0;
447 u8 val = 0x0;
448
449 if (rid != MAX8997_CHARGER_CV)
450 return -EINVAL;
451
452 ret = max8997_get_voltage_register(rdev, &reg, &shift, &mask);
453 if (ret)
454 return ret;
455
456 if (max_uV < 4000000 || min_uV > 4350000)
457 return -EINVAL;
458
459 if (min_uV <= 4000000) {
460 if (max_uV >= 4000000)
461 return -EINVAL;
462 else
463 val = 0x1;
464 } else if (min_uV <= 4200000 && max_uV >= 4200000)
465 val = 0x0;
466 else {
467 lb = (min_uV - 4000001) / 20000 + 2;
468 ub = (max_uV - 4000000) / 20000 + 1;
469
470 if (lb > ub)
471 return -EINVAL;
472
473 if (lb < 0xf)
474 val = lb;
475 else {
476 if (ub >= 0xf)
477 val = 0xf;
478 else
479 return -EINVAL;
480 }
481 }
482
483 *selector = val;
484
485 ret = max8997_update_reg(i2c, reg, val << shift, mask);
486
487 return ret;
488}
489
490/*
491 * For LDO1 ~ LDO21, BUCK1~5, BUCK7, CHARGER, CHARGER_TOPOFF
492 * BUCK1, 2, and 5 are available if they are not controlled by gpio
493 */
494static int max8997_set_voltage_ldobuck(struct regulator_dev *rdev,
495 int min_uV, int max_uV, unsigned *selector)
496{
497 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
498 struct i2c_client *i2c = max8997->iodev->i2c;
499 int min_vol = min_uV / 1000, max_vol = max_uV / 1000;
500 const struct voltage_map_desc *desc;
b3e1348e 501 int rid = rdev_get_id(rdev);
bd6ca2cf
MH		 502 int reg, shift = 0, mask, ret;
503 int i;
504 u8 org;
505
506 switch (rid) {
507 case MAX8997_LDO1 ... MAX8997_LDO21:
508 break;
509 case MAX8997_BUCK1 ... MAX8997_BUCK5:
510 break;
511 case MAX8997_BUCK6:
512 return -EINVAL;
513 case MAX8997_BUCK7:
514 break;
515 case MAX8997_CHARGER:
516 break;
517 case MAX8997_CHARGER_TOPOFF:
518 break;
519 default:
520 return -EINVAL;
521 }
522
523 desc = reg_voltage_map[rid];
524
525 i = max8997_get_voltage_proper_val(desc, min_vol, max_vol);
526 if (i < 0)
527 return i;
528
529 ret = max8997_get_voltage_register(rdev, &reg, &shift, &mask);
530 if (ret)
531 return ret;
532
533 max8997_read_reg(i2c, reg, &org);
534 org = (org & mask) >> shift;
535
536 ret = max8997_update_reg(i2c, reg, i << shift, mask << shift);
537 *selector = i;
538
539 if (rid == MAX8997_BUCK1 || rid == MAX8997_BUCK2 ||
540 rid == MAX8997_BUCK4 || rid == MAX8997_BUCK5) {
541 /* If the voltage is increasing */
542 if (org < i)
6ff325a2
DK		 543 udelay(DIV_ROUND_UP(desc->step * (i - org),
544 max8997->ramp_delay));
bd6ca2cf
MH		 545 }
546
547 return ret;
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 */
558static 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);
b3e1348e 562 int rid = rdev_get_id(rdev);
bd6ca2cf
MH		 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;
6e0414a5
MH		 588 buckx_gpiodvs[0] = max8997->buck1_gpiodvs;
589 buckx_gpiodvs[1] = max8997->buck2_gpiodvs;
590 buckx_gpiodvs[2] = max8997->buck5_gpiodvs;
bd6ca2cf
MH		 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 */
635static 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);
b3e1348e 639 int rid = rdev_get_id(rdev);
bd6ca2cf
MH		 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:
6e0414a5 650 if (max8997->buck1_gpiodvs)
bd6ca2cf
MH		 651 gpio_dvs_mode = true;
652 break;
653 case MAX8997_BUCK2:
6e0414a5 654 if (max8997->buck2_gpiodvs)
bd6ca2cf
MH		 655 gpio_dvs_mode = true;
656 break;
657 case MAX8997_BUCK5:
6e0414a5 658 if (max8997->buck5_gpiodvs)
bd6ca2cf
MH		 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
6e0414a5 692 if (max8997->ignore_gpiodvs_side_effect == false)
bd6ca2cf
MH		 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
698out:
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
709static const int safeoutvolt[] = {
710 3300000,
711 4850000,
712 4900000,
713 4950000,
714};
715
716/* For SAFEOUT1 and SAFEOUT2 */
717static int max8997_set_voltage_safeout(struct regulator_dev *rdev,
718 int min_uV, int max_uV, unsigned *selector)
719{
720 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
721 struct i2c_client *i2c = max8997->iodev->i2c;
b3e1348e 722 int rid = rdev_get_id(rdev);
bd6ca2cf
MH		 723 int reg, shift = 0, mask, ret;
724 int i = 0;
725 u8 val;
726
727 if (rid != MAX8997_ESAFEOUT1 && rid != MAX8997_ESAFEOUT2)
728 return -EINVAL;
729
730 for (i = 0; i < ARRAY_SIZE(safeoutvolt); i++) {
731 if (min_uV <= safeoutvolt[i] &&
732 max_uV >= safeoutvolt[i])
733 break;
734 }
735
736 if (i >= ARRAY_SIZE(safeoutvolt))
737 return -EINVAL;
738
739 if (i == 0)
740 val = 0x3;
741 else
742 val = i - 1;
743
744 ret = max8997_get_voltage_register(rdev, &reg, &shift, &mask);
745 if (ret)
746 return ret;
747
748 ret = max8997_update_reg(i2c, reg, val << shift, mask << shift);
749 *selector = val;
750
751 return ret;
752}
753
754static int max8997_reg_enable_suspend(struct regulator_dev *rdev)
755{
756 return 0;
757}
758
759static int max8997_reg_disable_suspend(struct regulator_dev *rdev)
760{
761 struct max8997_data *max8997 = rdev_get_drvdata(rdev);
762 struct i2c_client *i2c = max8997->iodev->i2c;
763 int ret, reg, mask, pattern;
b3e1348e 764 int rid = rdev_get_id(rdev);
bd6ca2cf
MH		 765
766 ret = max8997_get_enable_register(rdev, &reg, &mask, &pattern);
767 if (ret)
768 return ret;
769
770 max8997_read_reg(i2c, reg, &max8997->saved_states[rid]);
771
772 if (rid == MAX8997_LDO1 ||
773 rid == MAX8997_LDO10 ||
774 rid == MAX8997_LDO21) {
775 dev_dbg(&rdev->dev, "Conditional Power-Off for %s\n",
776 rdev->desc->name);
777 return max8997_update_reg(i2c, reg, 0x40, mask);
778 }
779
780 dev_dbg(&rdev->dev, "Full Power-Off for %s (%xh -> %xh)\n",
781 rdev->desc->name, max8997->saved_states[rid] & mask,
782 (~pattern) & mask);
783 return max8997_update_reg(i2c, reg, ~pattern, mask);
784}
785
786static struct regulator_ops max8997_ldo_ops = {
787 .list_voltage = max8997_list_voltage,
788 .is_enabled = max8997_reg_is_enabled,
789 .enable = max8997_reg_enable,
790 .disable = max8997_reg_disable,
791 .get_voltage = max8997_get_voltage,
792 .set_voltage = max8997_set_voltage_ldobuck,
793 .set_suspend_enable = max8997_reg_enable_suspend,
794 .set_suspend_disable = max8997_reg_disable_suspend,
795};
796
797static struct regulator_ops max8997_buck_ops = {
798 .list_voltage = max8997_list_voltage,
799 .is_enabled = max8997_reg_is_enabled,
800 .enable = max8997_reg_enable,
801 .disable = max8997_reg_disable,
802 .get_voltage = max8997_get_voltage,
803 .set_voltage = max8997_set_voltage_buck,
804 .set_suspend_enable = max8997_reg_enable_suspend,
805 .set_suspend_disable = max8997_reg_disable_suspend,
806};
807
808static struct regulator_ops max8997_fixedvolt_ops = {
809 .list_voltage = max8997_list_voltage,
810 .is_enabled = max8997_reg_is_enabled,
811 .enable = max8997_reg_enable,
812 .disable = max8997_reg_disable,
813 .set_suspend_enable = max8997_reg_enable_suspend,
814 .set_suspend_disable = max8997_reg_disable_suspend,
815};
816
817static struct regulator_ops max8997_safeout_ops = {
818 .list_voltage = max8997_list_voltage_safeout,
819 .is_enabled = max8997_reg_is_enabled,
820 .enable = max8997_reg_enable,
821 .disable = max8997_reg_disable,
822 .get_voltage = max8997_get_voltage,
823 .set_voltage = max8997_set_voltage_safeout,
824 .set_suspend_enable = max8997_reg_enable_suspend,
825 .set_suspend_disable = max8997_reg_disable_suspend,
826};
827
828static struct regulator_ops max8997_fixedstate_ops = {
829 .list_voltage = max8997_list_voltage_charger_cv,
830 .get_voltage = max8997_get_voltage,
831 .set_voltage = max8997_set_voltage_charger_cv,
832};
833
834static int max8997_set_voltage_ldobuck_wrap(struct regulator_dev *rdev,
835 int min_uV, int max_uV)
836{
837 unsigned dummy;
838
839 return max8997_set_voltage_ldobuck(rdev, min_uV, max_uV, &dummy);
840}
841
842
843static struct regulator_ops max8997_charger_ops = {
844 .is_enabled = max8997_reg_is_enabled,
845 .enable = max8997_reg_enable,
846 .disable = max8997_reg_disable,
847 .get_current_limit = max8997_get_voltage,
848 .set_current_limit = max8997_set_voltage_ldobuck_wrap,
849};
850
851static struct regulator_ops max8997_charger_fixedstate_ops = {
852 .is_enabled = max8997_reg_is_enabled,
853 .get_current_limit = max8997_get_voltage,
854 .set_current_limit = max8997_set_voltage_ldobuck_wrap,
855};
856
857#define regulator_desc_ldo(num) { \
858 .name = "LDO"#num, \
859 .id = MAX8997_LDO##num, \
860 .ops = &max8997_ldo_ops, \
861 .type = REGULATOR_VOLTAGE, \
862 .owner = THIS_MODULE, \
863}
864#define regulator_desc_buck(num) { \
865 .name = "BUCK"#num, \
866 .id = MAX8997_BUCK##num, \
867 .ops = &max8997_buck_ops, \
868 .type = REGULATOR_VOLTAGE, \
869 .owner = THIS_MODULE, \
870}
871
872static struct regulator_desc regulators[] = {
873 regulator_desc_ldo(1),
874 regulator_desc_ldo(2),
875 regulator_desc_ldo(3),
876 regulator_desc_ldo(4),
877 regulator_desc_ldo(5),
878 regulator_desc_ldo(6),
879 regulator_desc_ldo(7),
880 regulator_desc_ldo(8),
881 regulator_desc_ldo(9),
882 regulator_desc_ldo(10),
883 regulator_desc_ldo(11),
884 regulator_desc_ldo(12),
885 regulator_desc_ldo(13),
886 regulator_desc_ldo(14),
887 regulator_desc_ldo(15),
888 regulator_desc_ldo(16),
889 regulator_desc_ldo(17),
890 regulator_desc_ldo(18),
891 regulator_desc_ldo(21),
892 regulator_desc_buck(1),
893 regulator_desc_buck(2),
894 regulator_desc_buck(3),
895 regulator_desc_buck(4),
896 regulator_desc_buck(5),
897 {
898 .name = "BUCK6",
899 .id = MAX8997_BUCK6,
900 .ops = &max8997_fixedvolt_ops,
901 .type = REGULATOR_VOLTAGE,
902 .owner = THIS_MODULE,
903 },
904 regulator_desc_buck(7),
905 {
e371ceb8 906 .name = "EN32KHz_AP",
bd6ca2cf
MH		 907 .id = MAX8997_EN32KHZ_AP,
908 .ops = &max8997_fixedvolt_ops,
909 .type = REGULATOR_VOLTAGE,
910 .owner = THIS_MODULE,
911 }, {
e371ceb8 912 .name = "EN32KHz_CP",
bd6ca2cf
MH		 913 .id = MAX8997_EN32KHZ_CP,
914 .ops = &max8997_fixedvolt_ops,
915 .type = REGULATOR_VOLTAGE,
916 .owner = THIS_MODULE,
917 }, {
918 .name = "ENVICHG",
919 .id = MAX8997_ENVICHG,
920 .ops = &max8997_fixedvolt_ops,
921 .type = REGULATOR_VOLTAGE,
922 .owner = THIS_MODULE,
923 }, {
924 .name = "ESAFEOUT1",
925 .id = MAX8997_ESAFEOUT1,
926 .ops = &max8997_safeout_ops,
927 .type = REGULATOR_VOLTAGE,
928 .owner = THIS_MODULE,
929 }, {
930 .name = "ESAFEOUT2",
931 .id = MAX8997_ESAFEOUT2,
932 .ops = &max8997_safeout_ops,
933 .type = REGULATOR_VOLTAGE,
934 .owner = THIS_MODULE,
935 }, {
e371ceb8 936 .name = "CHARGER_CV",
bd6ca2cf
MH		 937 .id = MAX8997_CHARGER_CV,
938 .ops = &max8997_fixedstate_ops,
939 .type = REGULATOR_VOLTAGE,
940 .owner = THIS_MODULE,
941 }, {
942 .name = "CHARGER",
943 .id = MAX8997_CHARGER,
944 .ops = &max8997_charger_ops,
945 .type = REGULATOR_CURRENT,
946 .owner = THIS_MODULE,
947 }, {
e371ceb8 948 .name = "CHARGER_TOPOFF",
bd6ca2cf
MH		 949 .id = MAX8997_CHARGER_TOPOFF,
950 .ops = &max8997_charger_fixedstate_ops,
951 .type = REGULATOR_CURRENT,
952 .owner = THIS_MODULE,
953 },
954};
955
956static __devinit int max8997_pmic_probe(struct platform_device *pdev)
957{
958 struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent);
959 struct max8997_platform_data *pdata = dev_get_platdata(iodev->dev);
960 struct regulator_dev **rdev;
961 struct max8997_data *max8997;
962 struct i2c_client *i2c;
963 int i, ret, size;
964 u8 max_buck1 = 0, max_buck2 = 0, max_buck5 = 0;
965
966 if (!pdata) {
967 dev_err(pdev->dev.parent, "No platform init data supplied.\n");
968 return -ENODEV;
969 }
970
971 max8997 = kzalloc(sizeof(struct max8997_data), GFP_KERNEL);
972 if (!max8997)
973 return -ENOMEM;
974
975 size = sizeof(struct regulator_dev *) * pdata->num_regulators;
976 max8997->rdev = kzalloc(size, GFP_KERNEL);
977 if (!max8997->rdev) {
978 kfree(max8997);
979 return -ENOMEM;
980 }
981
982 rdev = max8997->rdev;
983 max8997->dev = &pdev->dev;
984 max8997->iodev = iodev;
985 max8997->num_regulators = pdata->num_regulators;
986 platform_set_drvdata(pdev, max8997);
987 i2c = max8997->iodev->i2c;
988
989 max8997->buck125_gpioindex = pdata->buck125_default_idx;
6e0414a5
MH		 990 max8997->buck1_gpiodvs = pdata->buck1_gpiodvs;
991 max8997->buck2_gpiodvs = pdata->buck2_gpiodvs;
992 max8997->buck5_gpiodvs = pdata->buck5_gpiodvs;
993 memcpy(max8997->buck125_gpios, pdata->buck125_gpios, sizeof(int) * 3);
994 max8997->ignore_gpiodvs_side_effect = pdata->ignore_gpiodvs_side_effect;
bd6ca2cf
MH		 995
996 for (i = 0; i < 8; i++) {
997 max8997->buck1_vol[i] = ret =
998 max8997_get_voltage_proper_val(
999 &buck1245_voltage_map_desc,
1000 pdata->buck1_voltage[i] / 1000,
1001 pdata->buck1_voltage[i] / 1000 +
1002 buck1245_voltage_map_desc.step);
1003 if (ret < 0)
1004 goto err_alloc;
1005
1006 max8997->buck2_vol[i] = ret =
1007 max8997_get_voltage_proper_val(
1008 &buck1245_voltage_map_desc,
1009 pdata->buck2_voltage[i] / 1000,
1010 pdata->buck2_voltage[i] / 1000 +
1011 buck1245_voltage_map_desc.step);
1012 if (ret < 0)
1013 goto err_alloc;
1014
1015 max8997->buck5_vol[i] = ret =
1016 max8997_get_voltage_proper_val(
1017 &buck1245_voltage_map_desc,
1018 pdata->buck5_voltage[i] / 1000,
1019 pdata->buck5_voltage[i] / 1000 +
1020 buck1245_voltage_map_desc.step);
1021 if (ret < 0)
1022 goto err_alloc;
1023
1024 if (max_buck1 < max8997->buck1_vol[i])
1025 max_buck1 = max8997->buck1_vol[i];
1026 if (max_buck2 < max8997->buck2_vol[i])
1027 max_buck2 = max8997->buck2_vol[i];
1028 if (max_buck5 < max8997->buck5_vol[i])
1029 max_buck5 = max8997->buck5_vol[i];
1030 }
1031
1032 /* For the safety, set max voltage before setting up */
1033 for (i = 0; i < 8; i++) {
ecb9c4f5 1034 max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i,
bd6ca2cf 1035 max_buck1, 0x3f);
ecb9c4f5 1036 max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i,
bd6ca2cf 1037 max_buck2, 0x3f);
ecb9c4f5 1038 max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i,
bd6ca2cf
MH		 1039 max_buck5, 0x3f);
1040 }
1041
1042 /*
1043 * If buck 1, 2, and 5 do not care DVS GPIO settings, ignore them.
1044 * If at least one of them cares, set gpios.
1045 */
1046 if (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs ||
1047 pdata->buck5_gpiodvs) {
1048 bool gpio1set = false, gpio2set = false;
1049
1050 if (!gpio_is_valid(pdata->buck125_gpios[0]) ||
1051 !gpio_is_valid(pdata->buck125_gpios[1]) ||
1052 !gpio_is_valid(pdata->buck125_gpios[2])) {
1053 dev_err(&pdev->dev, "GPIO NOT VALID\n");
1054 ret = -EINVAL;
1055 goto err_alloc;
1056 }
1057
1058 ret = gpio_request(pdata->buck125_gpios[0],
1059 "MAX8997 SET1");
1060 if (ret == -EBUSY)
1061 dev_warn(&pdev->dev, "Duplicated gpio request"
1062 " on SET1\n");
1063 else if (ret)
1064 goto err_alloc;
1065 else
1066 gpio1set = true;
1067
1068 ret = gpio_request(pdata->buck125_gpios[1],
1069 "MAX8997 SET2");
1070 if (ret == -EBUSY)
1071 dev_warn(&pdev->dev, "Duplicated gpio request"
1072 " on SET2\n");
1073 else if (ret) {
1074 if (gpio1set)
1075 gpio_free(pdata->buck125_gpios[0]);
1076 goto err_alloc;
1077 } else
1078 gpio2set = true;
1079
1080 ret = gpio_request(pdata->buck125_gpios[2],
1081 "MAX8997 SET3");
1082 if (ret == -EBUSY)
1083 dev_warn(&pdev->dev, "Duplicated gpio request"
1084 " on SET3\n");
1085 else if (ret) {
1086 if (gpio1set)
1087 gpio_free(pdata->buck125_gpios[0]);
1088 if (gpio2set)
1089 gpio_free(pdata->buck125_gpios[1]);
1090 goto err_alloc;
1091 }
1092
1093 gpio_direction_output(pdata->buck125_gpios[0],
1094 (max8997->buck125_gpioindex >> 2)
1095 & 0x1); /* SET1 */
1096 gpio_direction_output(pdata->buck125_gpios[1],
1097 (max8997->buck125_gpioindex >> 1)
1098 & 0x1); /* SET2 */
1099 gpio_direction_output(pdata->buck125_gpios[2],
1100 (max8997->buck125_gpioindex >> 0)
1101 & 0x1); /* SET3 */
1102 ret = 0;
1103 }
1104
1105 /* DVS-GPIO disabled */
1106 max8997_update_reg(i2c, MAX8997_REG_BUCK1CTRL, (pdata->buck1_gpiodvs) ?
1107 (1 << 1) : (0 << 1), 1 << 1);
1108 max8997_update_reg(i2c, MAX8997_REG_BUCK2CTRL, (pdata->buck2_gpiodvs) ?
1109 (1 << 1) : (0 << 1), 1 << 1);
1110 max8997_update_reg(i2c, MAX8997_REG_BUCK5CTRL, (pdata->buck5_gpiodvs) ?
1111 (1 << 1) : (0 << 1), 1 << 1);
1112
1113 /* Initialize all the DVS related BUCK registers */
1114 for (i = 0; i < 8; i++) {
ecb9c4f5 1115 max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i,
bd6ca2cf
MH		 1116 max8997->buck1_vol[i],
1117 0x3f);
ecb9c4f5 1118 max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i,
bd6ca2cf
MH		 1119 max8997->buck2_vol[i],
1120 0x3f);
ecb9c4f5 1121 max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i,
bd6ca2cf
MH		 1122 max8997->buck5_vol[i],
1123 0x3f);
1124 }
1125
dbb48e7c
TB		 1126 /* Misc Settings */
1127 max8997->ramp_delay = 10; /* set 10mV/us, which is the default */
1128 max8997_write_reg(i2c, MAX8997_REG_BUCKRAMP, (0xf << 4) | 0x9);
1129
bd6ca2cf
MH		 1130 for (i = 0; i < pdata->num_regulators; i++) {
1131 const struct voltage_map_desc *desc;
1132 int id = pdata->regulators[i].id;
1133
1134 desc = reg_voltage_map[id];
1135 if (desc)
1136 regulators[id].n_voltages =
1137 (desc->max - desc->min) / desc->step + 1;
1138 else if (id == MAX8997_ESAFEOUT1 || id == MAX8997_ESAFEOUT2)
1139 regulators[id].n_voltages = 4;
1140 else if (id == MAX8997_CHARGER_CV)
1141 regulators[id].n_voltages = 16;
1142
1143 rdev[i] = regulator_register(&regulators[id], max8997->dev,
2c043bcb 1144 pdata->regulators[i].initdata, max8997, NULL);
bd6ca2cf
MH		 1145 if (IS_ERR(rdev[i])) {
1146 ret = PTR_ERR(rdev[i]);
1147 dev_err(max8997->dev, "regulator init failed for %d\n",
1148 id);
1149 rdev[i] = NULL;
1150 goto err;
1151 }
1152 }
1153
bd6ca2cf
MH		 1154 return 0;
1155err:
1156 for (i = 0; i < max8997->num_regulators; i++)
1157 if (rdev[i])
1158 regulator_unregister(rdev[i]);
1159err_alloc:
1160 kfree(max8997->rdev);
1161 kfree(max8997);
1162
1163 return ret;
1164}
1165
1166static int __devexit max8997_pmic_remove(struct platform_device *pdev)
1167{
1168 struct max8997_data *max8997 = platform_get_drvdata(pdev);
1169 struct regulator_dev **rdev = max8997->rdev;
1170 int i;
1171
1172 for (i = 0; i < max8997->num_regulators; i++)
1173 if (rdev[i])
1174 regulator_unregister(rdev[i]);
1175
1176 kfree(max8997->rdev);
1177 kfree(max8997);
1178
1179 return 0;
1180}
1181
1182static const struct platform_device_id max8997_pmic_id[] = {
1183 { "max8997-pmic", 0},
1184 { },
1185};
a51b907b 1186MODULE_DEVICE_TABLE(platform, max8997_pmic_id);
bd6ca2cf
MH		 1187
1188static struct platform_driver max8997_pmic_driver = {
1189 .driver = {
1190 .name = "max8997-pmic",
1191 .owner = THIS_MODULE,
1192 },
1193 .probe = max8997_pmic_probe,
1194 .remove = __devexit_p(max8997_pmic_remove),
1195 .id_table = max8997_pmic_id,
1196};
1197
1198static int __init max8997_pmic_init(void)
1199{
1200 return platform_driver_register(&max8997_pmic_driver);
1201}
1202subsys_initcall(max8997_pmic_init);
1203
1204static void __exit max8997_pmic_cleanup(void)
1205{
1206 platform_driver_unregister(&max8997_pmic_driver);
1207}
1208module_exit(max8997_pmic_cleanup);
1209
1210MODULE_DESCRIPTION("MAXIM 8997/8966 Regulator Driver");
1211MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
1212MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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