Merge remote-tracking branch 'regulator/topic/max8998' into regulator-next
[~shefty/rdma-dev.git] / drivers / regulator / max8998.c
1 /*
2  * max8998.c - Voltage regulator driver for the Maxim 8998
3  *
4  *  Copyright (C) 2009-2010 Samsung Electronics
5  *  Kyungmin Park <kyungmin.park@samsung.com>
6  *  Marek Szyprowski <m.szyprowski@samsung.com>
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation; either version 2 of the License, or
11  * (at your option) any later version.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with this program; if not, write to the Free Software
20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
21  */
22
23 #include <linux/module.h>
24 #include <linux/init.h>
25 #include <linux/i2c.h>
26 #include <linux/err.h>
27 #include <linux/gpio.h>
28 #include <linux/slab.h>
29 #include <linux/interrupt.h>
30 #include <linux/mutex.h>
31 #include <linux/platform_device.h>
32 #include <linux/regulator/driver.h>
33 #include <linux/mfd/max8998.h>
34 #include <linux/mfd/max8998-private.h>
35
36 struct max8998_data {
37         struct device           *dev;
38         struct max8998_dev      *iodev;
39         int                     num_regulators;
40         struct regulator_dev    **rdev;
41         u8                      buck1_vol[4]; /* voltages for selection */
42         u8                      buck2_vol[2];
43         unsigned int            buck1_idx; /* index to last changed voltage */
44                                            /* value in a set */
45         unsigned int            buck2_idx;
46 };
47
48 struct voltage_map_desc {
49         int min;
50         int max;
51         int step;
52 };
53
54 /* Voltage maps in uV*/
55 static const struct voltage_map_desc ldo23_voltage_map_desc = {
56         .min = 800000,  .step = 50000,  .max = 1300000,
57 };
58 static const struct voltage_map_desc ldo456711_voltage_map_desc = {
59         .min = 1600000, .step = 100000, .max = 3600000,
60 };
61 static const struct voltage_map_desc ldo8_voltage_map_desc = {
62         .min = 3000000, .step = 100000, .max = 3600000,
63 };
64 static const struct voltage_map_desc ldo9_voltage_map_desc = {
65         .min = 2800000, .step = 100000, .max = 3100000,
66 };
67 static const struct voltage_map_desc ldo10_voltage_map_desc = {
68         .min = 950000,  .step = 50000,  .max = 1300000,
69 };
70 static const struct voltage_map_desc ldo1213_voltage_map_desc = {
71         .min = 800000,  .step = 100000, .max = 3300000,
72 };
73 static const struct voltage_map_desc ldo1415_voltage_map_desc = {
74         .min = 1200000, .step = 100000, .max = 3300000,
75 };
76 static const struct voltage_map_desc ldo1617_voltage_map_desc = {
77         .min = 1600000, .step = 100000, .max = 3600000,
78 };
79 static const struct voltage_map_desc buck12_voltage_map_desc = {
80         .min = 750000,  .step = 25000,  .max = 1525000,
81 };
82 static const struct voltage_map_desc buck3_voltage_map_desc = {
83         .min = 1600000, .step = 100000, .max = 3600000,
84 };
85 static const struct voltage_map_desc buck4_voltage_map_desc = {
86         .min = 800000,  .step = 100000, .max = 2300000,
87 };
88
89 static const struct voltage_map_desc *ldo_voltage_map[] = {
90         NULL,
91         NULL,
92         &ldo23_voltage_map_desc,        /* LDO2 */
93         &ldo23_voltage_map_desc,        /* LDO3 */
94         &ldo456711_voltage_map_desc,    /* LDO4 */
95         &ldo456711_voltage_map_desc,    /* LDO5 */
96         &ldo456711_voltage_map_desc,    /* LDO6 */
97         &ldo456711_voltage_map_desc,    /* LDO7 */
98         &ldo8_voltage_map_desc,         /* LDO8 */
99         &ldo9_voltage_map_desc,         /* LDO9 */
100         &ldo10_voltage_map_desc,        /* LDO10 */
101         &ldo456711_voltage_map_desc,    /* LDO11 */
102         &ldo1213_voltage_map_desc,      /* LDO12 */
103         &ldo1213_voltage_map_desc,      /* LDO13 */
104         &ldo1415_voltage_map_desc,      /* LDO14 */
105         &ldo1415_voltage_map_desc,      /* LDO15 */
106         &ldo1617_voltage_map_desc,      /* LDO16 */
107         &ldo1617_voltage_map_desc,      /* LDO17 */
108         &buck12_voltage_map_desc,       /* BUCK1 */
109         &buck12_voltage_map_desc,       /* BUCK2 */
110         &buck3_voltage_map_desc,        /* BUCK3 */
111         &buck4_voltage_map_desc,        /* BUCK4 */
112 };
113
114 static int max8998_get_enable_register(struct regulator_dev *rdev,
115                                         int *reg, int *shift)
116 {
117         int ldo = rdev_get_id(rdev);
118
119         switch (ldo) {
120         case MAX8998_LDO2 ... MAX8998_LDO5:
121                 *reg = MAX8998_REG_ONOFF1;
122                 *shift = 3 - (ldo - MAX8998_LDO2);
123                 break;
124         case MAX8998_LDO6 ... MAX8998_LDO13:
125                 *reg = MAX8998_REG_ONOFF2;
126                 *shift = 7 - (ldo - MAX8998_LDO6);
127                 break;
128         case MAX8998_LDO14 ... MAX8998_LDO17:
129                 *reg = MAX8998_REG_ONOFF3;
130                 *shift = 7 - (ldo - MAX8998_LDO14);
131                 break;
132         case MAX8998_BUCK1 ... MAX8998_BUCK4:
133                 *reg = MAX8998_REG_ONOFF1;
134                 *shift = 7 - (ldo - MAX8998_BUCK1);
135                 break;
136         case MAX8998_EN32KHZ_AP ... MAX8998_ENVICHG:
137                 *reg = MAX8998_REG_ONOFF4;
138                 *shift = 7 - (ldo - MAX8998_EN32KHZ_AP);
139                 break;
140         case MAX8998_ESAFEOUT1 ... MAX8998_ESAFEOUT2:
141                 *reg = MAX8998_REG_CHGR2;
142                 *shift = 7 - (ldo - MAX8998_ESAFEOUT1);
143                 break;
144         default:
145                 return -EINVAL;
146         }
147
148         return 0;
149 }
150
151 static int max8998_ldo_is_enabled(struct regulator_dev *rdev)
152 {
153         struct max8998_data *max8998 = rdev_get_drvdata(rdev);
154         struct i2c_client *i2c = max8998->iodev->i2c;
155         int ret, reg, shift = 8;
156         u8 val;
157
158         ret = max8998_get_enable_register(rdev, &reg, &shift);
159         if (ret)
160                 return ret;
161
162         ret = max8998_read_reg(i2c, reg, &val);
163         if (ret)
164                 return ret;
165
166         return val & (1 << shift);
167 }
168
169 static int max8998_ldo_enable(struct regulator_dev *rdev)
170 {
171         struct max8998_data *max8998 = rdev_get_drvdata(rdev);
172         struct i2c_client *i2c = max8998->iodev->i2c;
173         int reg, shift = 8, ret;
174
175         ret = max8998_get_enable_register(rdev, &reg, &shift);
176         if (ret)
177                 return ret;
178
179         return max8998_update_reg(i2c, reg, 1<<shift, 1<<shift);
180 }
181
182 static int max8998_ldo_disable(struct regulator_dev *rdev)
183 {
184         struct max8998_data *max8998 = rdev_get_drvdata(rdev);
185         struct i2c_client *i2c = max8998->iodev->i2c;
186         int reg, shift = 8, ret;
187
188         ret = max8998_get_enable_register(rdev, &reg, &shift);
189         if (ret)
190                 return ret;
191
192         return max8998_update_reg(i2c, reg, 0, 1<<shift);
193 }
194
195 static int max8998_get_voltage_register(struct regulator_dev *rdev,
196                                 int *_reg, int *_shift, int *_mask)
197 {
198         int ldo = rdev_get_id(rdev);
199         struct max8998_data *max8998 = rdev_get_drvdata(rdev);
200         int reg, shift = 0, mask = 0xff;
201
202         switch (ldo) {
203         case MAX8998_LDO2 ... MAX8998_LDO3:
204                 reg = MAX8998_REG_LDO2_LDO3;
205                 mask = 0xf;
206                 if (ldo == MAX8998_LDO2)
207                         shift = 4;
208                 else
209                         shift = 0;
210                 break;
211         case MAX8998_LDO4 ... MAX8998_LDO7:
212                 reg = MAX8998_REG_LDO4 + (ldo - MAX8998_LDO4);
213                 break;
214         case MAX8998_LDO8 ... MAX8998_LDO9:
215                 reg = MAX8998_REG_LDO8_LDO9;
216                 mask = 0xf;
217                 if (ldo == MAX8998_LDO8)
218                         shift = 4;
219                 else
220                         shift = 0;
221                 break;
222         case MAX8998_LDO10 ... MAX8998_LDO11:
223                 reg = MAX8998_REG_LDO10_LDO11;
224                 if (ldo == MAX8998_LDO10) {
225                         shift = 5;
226                         mask = 0x7;
227                 } else {
228                         shift = 0;
229                         mask = 0x1f;
230                 }
231                 break;
232         case MAX8998_LDO12 ... MAX8998_LDO17:
233                 reg = MAX8998_REG_LDO12 + (ldo - MAX8998_LDO12);
234                 break;
235         case MAX8998_BUCK1:
236                 reg = MAX8998_REG_BUCK1_VOLTAGE1 + max8998->buck1_idx;
237                 break;
238         case MAX8998_BUCK2:
239                 reg = MAX8998_REG_BUCK2_VOLTAGE1 + max8998->buck2_idx;
240                 break;
241         case MAX8998_BUCK3:
242                 reg = MAX8998_REG_BUCK3;
243                 break;
244         case MAX8998_BUCK4:
245                 reg = MAX8998_REG_BUCK4;
246                 break;
247         default:
248                 return -EINVAL;
249         }
250
251         *_reg = reg;
252         *_shift = shift;
253         *_mask = mask;
254
255         return 0;
256 }
257
258 static int max8998_get_voltage_sel(struct regulator_dev *rdev)
259 {
260         struct max8998_data *max8998 = rdev_get_drvdata(rdev);
261         struct i2c_client *i2c = max8998->iodev->i2c;
262         int reg, shift = 0, mask, ret;
263         u8 val;
264
265         ret = max8998_get_voltage_register(rdev, &reg, &shift, &mask);
266         if (ret)
267                 return ret;
268
269         ret = max8998_read_reg(i2c, reg, &val);
270         if (ret)
271                 return ret;
272
273         val >>= shift;
274         val &= mask;
275
276         return val;
277 }
278
279 static int max8998_set_voltage_ldo_sel(struct regulator_dev *rdev,
280                                        unsigned selector)
281 {
282         struct max8998_data *max8998 = rdev_get_drvdata(rdev);
283         struct i2c_client *i2c = max8998->iodev->i2c;
284         int reg, shift = 0, mask, ret;
285
286         ret = max8998_get_voltage_register(rdev, &reg, &shift, &mask);
287         if (ret)
288                 return ret;
289
290         ret = max8998_update_reg(i2c, reg, selector<<shift, mask<<shift);
291
292         return ret;
293 }
294
295 static inline void buck1_gpio_set(int gpio1, int gpio2, int v)
296 {
297         gpio_set_value(gpio1, v & 0x1);
298         gpio_set_value(gpio2, (v >> 1) & 0x1);
299 }
300
301 static inline void buck2_gpio_set(int gpio, int v)
302 {
303         gpio_set_value(gpio, v & 0x1);
304 }
305
306 static int max8998_set_voltage_buck_sel(struct regulator_dev *rdev,
307                                         unsigned selector)
308 {
309         struct max8998_data *max8998 = rdev_get_drvdata(rdev);
310         struct max8998_platform_data *pdata =
311                 dev_get_platdata(max8998->iodev->dev);
312         struct i2c_client *i2c = max8998->iodev->i2c;
313         int buck = rdev_get_id(rdev);
314         int reg, shift = 0, mask, ret, j;
315         static u8 buck1_last_val;
316
317         ret = max8998_get_voltage_register(rdev, &reg, &shift, &mask);
318         if (ret)
319                 return ret;
320
321         switch (buck) {
322         case MAX8998_BUCK1:
323                 dev_dbg(max8998->dev,
324                         "BUCK1, selector:%d, buck1_vol1:%d, buck1_vol2:%d\n"
325                         "buck1_vol3:%d, buck1_vol4:%d\n",
326                         selector, max8998->buck1_vol[0], max8998->buck1_vol[1],
327                         max8998->buck1_vol[2], max8998->buck1_vol[3]);
328
329                 if (gpio_is_valid(pdata->buck1_set1) &&
330                     gpio_is_valid(pdata->buck1_set2)) {
331
332                         /* check if requested voltage */
333                         /* value is already defined */
334                         for (j = 0; j < ARRAY_SIZE(max8998->buck1_vol); j++) {
335                                 if (max8998->buck1_vol[j] == selector) {
336                                         max8998->buck1_idx = j;
337                                         buck1_gpio_set(pdata->buck1_set1,
338                                                        pdata->buck1_set2, j);
339                                         goto buck1_exit;
340                                 }
341                         }
342
343                         if (pdata->buck_voltage_lock)
344                                 return -EINVAL;
345
346                         /* no predefine regulator found */
347                         max8998->buck1_idx = (buck1_last_val % 2) + 2;
348                         dev_dbg(max8998->dev, "max8998->buck1_idx:%d\n",
349                                 max8998->buck1_idx);
350                         max8998->buck1_vol[max8998->buck1_idx] = selector;
351                         ret = max8998_get_voltage_register(rdev, &reg,
352                                                            &shift,
353                                                            &mask);
354                         ret = max8998_write_reg(i2c, reg, selector);
355                         buck1_gpio_set(pdata->buck1_set1,
356                                        pdata->buck1_set2, max8998->buck1_idx);
357                         buck1_last_val++;
358 buck1_exit:
359                         dev_dbg(max8998->dev, "%s: SET1:%d, SET2:%d\n",
360                                 i2c->name, gpio_get_value(pdata->buck1_set1),
361                                 gpio_get_value(pdata->buck1_set2));
362                         break;
363                 } else {
364                         ret = max8998_write_reg(i2c, reg, selector);
365                 }
366                 break;
367
368         case MAX8998_BUCK2:
369                 dev_dbg(max8998->dev,
370                         "BUCK2, selector:%d buck2_vol1:%d, buck2_vol2:%d\n",
371                         selector, max8998->buck2_vol[0], max8998->buck2_vol[1]);
372                 if (gpio_is_valid(pdata->buck2_set3)) {
373
374                         /* check if requested voltage */
375                         /* value is already defined */
376                         for (j = 0; j < ARRAY_SIZE(max8998->buck2_vol); j++) {
377                                 if (max8998->buck2_vol[j] == selector) {
378                                         max8998->buck2_idx = j;
379                                         buck2_gpio_set(pdata->buck2_set3, j);
380                                         goto buck2_exit;
381                                 }
382                         }
383
384                         if (pdata->buck_voltage_lock)
385                                 return -EINVAL;
386
387                         max8998_get_voltage_register(rdev,
388                                         &reg, &shift, &mask);
389                         ret = max8998_write_reg(i2c, reg, selector);
390                         max8998->buck2_vol[max8998->buck2_idx] = selector;
391                         buck2_gpio_set(pdata->buck2_set3, max8998->buck2_idx);
392 buck2_exit:
393                         dev_dbg(max8998->dev, "%s: SET3:%d\n", i2c->name,
394                                 gpio_get_value(pdata->buck2_set3));
395                 } else {
396                         ret = max8998_write_reg(i2c, reg, selector);
397                 }
398                 break;
399
400         case MAX8998_BUCK3:
401         case MAX8998_BUCK4:
402                 ret = max8998_update_reg(i2c, reg, selector<<shift,
403                                          mask<<shift);
404                 break;
405         }
406
407         return ret;
408 }
409
410 static int max8998_set_voltage_buck_time_sel(struct regulator_dev *rdev,
411                                              unsigned int old_selector,
412                                              unsigned int new_selector)
413 {
414         struct max8998_data *max8998 = rdev_get_drvdata(rdev);
415         struct i2c_client *i2c = max8998->iodev->i2c;
416         const struct voltage_map_desc *desc;
417         int buck = rdev_get_id(rdev);
418         u8 val = 0;
419         int difference, ret;
420
421         if (buck < MAX8998_BUCK1 || buck > MAX8998_BUCK4)
422                 return -EINVAL;
423
424         desc = ldo_voltage_map[buck];
425
426         /* Voltage stabilization */
427         ret = max8998_read_reg(i2c, MAX8998_REG_ONOFF4, &val);
428         if (ret)
429                 return ret;
430
431         /* lp3974 hasn't got ENRAMP bit - ramp is assumed as true */
432         /* MAX8998 has ENRAMP bit implemented, so test it*/
433         if (max8998->iodev->type == TYPE_MAX8998 && !(val & MAX8998_ENRAMP))
434                 return 0;
435
436         difference = (new_selector - old_selector) * desc->step / 1000;
437         if (difference > 0)
438                 return DIV_ROUND_UP(difference, (val & 0x0f) + 1);
439
440         return 0;
441 }
442
443 static struct regulator_ops max8998_ldo_ops = {
444         .list_voltage           = regulator_list_voltage_linear,
445         .map_voltage            = regulator_map_voltage_linear,
446         .is_enabled             = max8998_ldo_is_enabled,
447         .enable                 = max8998_ldo_enable,
448         .disable                = max8998_ldo_disable,
449         .get_voltage_sel        = max8998_get_voltage_sel,
450         .set_voltage_sel        = max8998_set_voltage_ldo_sel,
451 };
452
453 static struct regulator_ops max8998_buck_ops = {
454         .list_voltage           = regulator_list_voltage_linear,
455         .map_voltage            = regulator_map_voltage_linear,
456         .is_enabled             = max8998_ldo_is_enabled,
457         .enable                 = max8998_ldo_enable,
458         .disable                = max8998_ldo_disable,
459         .get_voltage_sel        = max8998_get_voltage_sel,
460         .set_voltage_sel        = max8998_set_voltage_buck_sel,
461         .set_voltage_time_sel   = max8998_set_voltage_buck_time_sel,
462 };
463
464 static struct regulator_ops max8998_others_ops = {
465         .is_enabled             = max8998_ldo_is_enabled,
466         .enable                 = max8998_ldo_enable,
467         .disable                = max8998_ldo_disable,
468 };
469
470 static struct regulator_desc regulators[] = {
471         {
472                 .name           = "LDO2",
473                 .id             = MAX8998_LDO2,
474                 .ops            = &max8998_ldo_ops,
475                 .type           = REGULATOR_VOLTAGE,
476                 .owner          = THIS_MODULE,
477         }, {
478                 .name           = "LDO3",
479                 .id             = MAX8998_LDO3,
480                 .ops            = &max8998_ldo_ops,
481                 .type           = REGULATOR_VOLTAGE,
482                 .owner          = THIS_MODULE,
483         }, {
484                 .name           = "LDO4",
485                 .id             = MAX8998_LDO4,
486                 .ops            = &max8998_ldo_ops,
487                 .type           = REGULATOR_VOLTAGE,
488                 .owner          = THIS_MODULE,
489         }, {
490                 .name           = "LDO5",
491                 .id             = MAX8998_LDO5,
492                 .ops            = &max8998_ldo_ops,
493                 .type           = REGULATOR_VOLTAGE,
494                 .owner          = THIS_MODULE,
495         }, {
496                 .name           = "LDO6",
497                 .id             = MAX8998_LDO6,
498                 .ops            = &max8998_ldo_ops,
499                 .type           = REGULATOR_VOLTAGE,
500                 .owner          = THIS_MODULE,
501         }, {
502                 .name           = "LDO7",
503                 .id             = MAX8998_LDO7,
504                 .ops            = &max8998_ldo_ops,
505                 .type           = REGULATOR_VOLTAGE,
506                 .owner          = THIS_MODULE,
507         }, {
508                 .name           = "LDO8",
509                 .id             = MAX8998_LDO8,
510                 .ops            = &max8998_ldo_ops,
511                 .type           = REGULATOR_VOLTAGE,
512                 .owner          = THIS_MODULE,
513         }, {
514                 .name           = "LDO9",
515                 .id             = MAX8998_LDO9,
516                 .ops            = &max8998_ldo_ops,
517                 .type           = REGULATOR_VOLTAGE,
518                 .owner          = THIS_MODULE,
519         }, {
520                 .name           = "LDO10",
521                 .id             = MAX8998_LDO10,
522                 .ops            = &max8998_ldo_ops,
523                 .type           = REGULATOR_VOLTAGE,
524                 .owner          = THIS_MODULE,
525         }, {
526                 .name           = "LDO11",
527                 .id             = MAX8998_LDO11,
528                 .ops            = &max8998_ldo_ops,
529                 .type           = REGULATOR_VOLTAGE,
530                 .owner          = THIS_MODULE,
531         }, {
532                 .name           = "LDO12",
533                 .id             = MAX8998_LDO12,
534                 .ops            = &max8998_ldo_ops,
535                 .type           = REGULATOR_VOLTAGE,
536                 .owner          = THIS_MODULE,
537         }, {
538                 .name           = "LDO13",
539                 .id             = MAX8998_LDO13,
540                 .ops            = &max8998_ldo_ops,
541                 .type           = REGULATOR_VOLTAGE,
542                 .owner          = THIS_MODULE,
543         }, {
544                 .name           = "LDO14",
545                 .id             = MAX8998_LDO14,
546                 .ops            = &max8998_ldo_ops,
547                 .type           = REGULATOR_VOLTAGE,
548                 .owner          = THIS_MODULE,
549         }, {
550                 .name           = "LDO15",
551                 .id             = MAX8998_LDO15,
552                 .ops            = &max8998_ldo_ops,
553                 .type           = REGULATOR_VOLTAGE,
554                 .owner          = THIS_MODULE,
555         }, {
556                 .name           = "LDO16",
557                 .id             = MAX8998_LDO16,
558                 .ops            = &max8998_ldo_ops,
559                 .type           = REGULATOR_VOLTAGE,
560                 .owner          = THIS_MODULE,
561         }, {
562                 .name           = "LDO17",
563                 .id             = MAX8998_LDO17,
564                 .ops            = &max8998_ldo_ops,
565                 .type           = REGULATOR_VOLTAGE,
566                 .owner          = THIS_MODULE,
567         }, {
568                 .name           = "BUCK1",
569                 .id             = MAX8998_BUCK1,
570                 .ops            = &max8998_buck_ops,
571                 .type           = REGULATOR_VOLTAGE,
572                 .owner          = THIS_MODULE,
573         }, {
574                 .name           = "BUCK2",
575                 .id             = MAX8998_BUCK2,
576                 .ops            = &max8998_buck_ops,
577                 .type           = REGULATOR_VOLTAGE,
578                 .owner          = THIS_MODULE,
579         }, {
580                 .name           = "BUCK3",
581                 .id             = MAX8998_BUCK3,
582                 .ops            = &max8998_buck_ops,
583                 .type           = REGULATOR_VOLTAGE,
584                 .owner          = THIS_MODULE,
585         }, {
586                 .name           = "BUCK4",
587                 .id             = MAX8998_BUCK4,
588                 .ops            = &max8998_buck_ops,
589                 .type           = REGULATOR_VOLTAGE,
590                 .owner          = THIS_MODULE,
591         }, {
592                 .name           = "EN32KHz AP",
593                 .id             = MAX8998_EN32KHZ_AP,
594                 .ops            = &max8998_others_ops,
595                 .type           = REGULATOR_VOLTAGE,
596                 .owner          = THIS_MODULE,
597         }, {
598                 .name           = "EN32KHz CP",
599                 .id             = MAX8998_EN32KHZ_CP,
600                 .ops            = &max8998_others_ops,
601                 .type           = REGULATOR_VOLTAGE,
602                 .owner          = THIS_MODULE,
603         }, {
604                 .name           = "ENVICHG",
605                 .id             = MAX8998_ENVICHG,
606                 .ops            = &max8998_others_ops,
607                 .type           = REGULATOR_VOLTAGE,
608                 .owner          = THIS_MODULE,
609         }, {
610                 .name           = "ESAFEOUT1",
611                 .id             = MAX8998_ESAFEOUT1,
612                 .ops            = &max8998_others_ops,
613                 .type           = REGULATOR_VOLTAGE,
614                 .owner          = THIS_MODULE,
615         }, {
616                 .name           = "ESAFEOUT2",
617                 .id             = MAX8998_ESAFEOUT2,
618                 .ops            = &max8998_others_ops,
619                 .type           = REGULATOR_VOLTAGE,
620                 .owner          = THIS_MODULE,
621         }
622 };
623
624 static int max8998_pmic_probe(struct platform_device *pdev)
625 {
626         struct max8998_dev *iodev = dev_get_drvdata(pdev->dev.parent);
627         struct max8998_platform_data *pdata = dev_get_platdata(iodev->dev);
628         struct regulator_config config = { };
629         struct regulator_dev **rdev;
630         struct max8998_data *max8998;
631         struct i2c_client *i2c;
632         int i, ret, size;
633
634         if (!pdata) {
635                 dev_err(pdev->dev.parent, "No platform init data supplied\n");
636                 return -ENODEV;
637         }
638
639         max8998 = devm_kzalloc(&pdev->dev, sizeof(struct max8998_data),
640                                GFP_KERNEL);
641         if (!max8998)
642                 return -ENOMEM;
643
644         size = sizeof(struct regulator_dev *) * pdata->num_regulators;
645         max8998->rdev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
646         if (!max8998->rdev)
647                 return -ENOMEM;
648
649         rdev = max8998->rdev;
650         max8998->dev = &pdev->dev;
651         max8998->iodev = iodev;
652         max8998->num_regulators = pdata->num_regulators;
653         platform_set_drvdata(pdev, max8998);
654         i2c = max8998->iodev->i2c;
655
656         max8998->buck1_idx = pdata->buck1_default_idx;
657         max8998->buck2_idx = pdata->buck2_default_idx;
658
659         /* NOTE: */
660         /* For unused GPIO NOT marked as -1 (thereof equal to 0)  WARN_ON */
661         /* will be displayed */
662
663         /* Check if MAX8998 voltage selection GPIOs are defined */
664         if (gpio_is_valid(pdata->buck1_set1) &&
665             gpio_is_valid(pdata->buck1_set2)) {
666                 /* Check if SET1 is not equal to 0 */
667                 if (!pdata->buck1_set1) {
668                         printk(KERN_ERR "MAX8998 SET1 GPIO defined as 0 !\n");
669                         WARN_ON(!pdata->buck1_set1);
670                         ret = -EIO;
671                         goto err_out;
672                 }
673                 /* Check if SET2 is not equal to 0 */
674                 if (!pdata->buck1_set2) {
675                         printk(KERN_ERR "MAX8998 SET2 GPIO defined as 0 !\n");
676                         WARN_ON(!pdata->buck1_set2);
677                         ret = -EIO;
678                         goto err_out;
679                 }
680
681                 gpio_request(pdata->buck1_set1, "MAX8998 BUCK1_SET1");
682                 gpio_direction_output(pdata->buck1_set1,
683                                       max8998->buck1_idx & 0x1);
684
685
686                 gpio_request(pdata->buck1_set2, "MAX8998 BUCK1_SET2");
687                 gpio_direction_output(pdata->buck1_set2,
688                                       (max8998->buck1_idx >> 1) & 0x1);
689                 /* Set predefined value for BUCK1 register 1 */
690                 i = 0;
691                 while (buck12_voltage_map_desc.min +
692                        buck12_voltage_map_desc.step*i
693                        < pdata->buck1_voltage1)
694                         i++;
695                 max8998->buck1_vol[0] = i;
696                 ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE1, i);
697                 if (ret)
698                         goto err_out;
699
700                 /* Set predefined value for BUCK1 register 2 */
701                 i = 0;
702                 while (buck12_voltage_map_desc.min +
703                        buck12_voltage_map_desc.step*i
704                        < pdata->buck1_voltage2)
705                         i++;
706
707                 max8998->buck1_vol[1] = i;
708                 ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE2, i);
709                 if (ret)
710                         goto err_out;
711
712                 /* Set predefined value for BUCK1 register 3 */
713                 i = 0;
714                 while (buck12_voltage_map_desc.min +
715                        buck12_voltage_map_desc.step*i
716                        < pdata->buck1_voltage3)
717                         i++;
718
719                 max8998->buck1_vol[2] = i;
720                 ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE3, i);
721                 if (ret)
722                         goto err_out;
723
724                 /* Set predefined value for BUCK1 register 4 */
725                 i = 0;
726                 while (buck12_voltage_map_desc.min +
727                        buck12_voltage_map_desc.step*i
728                        < pdata->buck1_voltage4)
729                         i++;
730
731                 max8998->buck1_vol[3] = i;
732                 ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE4, i);
733                 if (ret)
734                         goto err_out;
735
736         }
737
738         if (gpio_is_valid(pdata->buck2_set3)) {
739                 /* Check if SET3 is not equal to 0 */
740                 if (!pdata->buck2_set3) {
741                         printk(KERN_ERR "MAX8998 SET3 GPIO defined as 0 !\n");
742                         WARN_ON(!pdata->buck2_set3);
743                         ret = -EIO;
744                         goto err_out;
745                 }
746                 gpio_request(pdata->buck2_set3, "MAX8998 BUCK2_SET3");
747                 gpio_direction_output(pdata->buck2_set3,
748                                       max8998->buck2_idx & 0x1);
749
750                 /* BUCK2 register 1 */
751                 i = 0;
752                 while (buck12_voltage_map_desc.min +
753                        buck12_voltage_map_desc.step*i
754                        < pdata->buck2_voltage1)
755                         i++;
756                 max8998->buck2_vol[0] = i;
757                 ret = max8998_write_reg(i2c, MAX8998_REG_BUCK2_VOLTAGE1, i);
758                 if (ret)
759                         goto err_out;
760
761                 /* BUCK2 register 2 */
762                 i = 0;
763                 while (buck12_voltage_map_desc.min +
764                        buck12_voltage_map_desc.step*i
765                        < pdata->buck2_voltage2)
766                         i++;
767                 max8998->buck2_vol[1] = i;
768                 ret = max8998_write_reg(i2c, MAX8998_REG_BUCK2_VOLTAGE2, i);
769                 if (ret)
770                         goto err_out;
771         }
772
773         for (i = 0; i < pdata->num_regulators; i++) {
774                 const struct voltage_map_desc *desc;
775                 int id = pdata->regulators[i].id;
776                 int index = id - MAX8998_LDO2;
777
778                 desc = ldo_voltage_map[id];
779                 if (desc && regulators[index].ops != &max8998_others_ops) {
780                         int count = (desc->max - desc->min) / desc->step + 1;
781
782                         regulators[index].n_voltages = count;
783                         regulators[index].min_uV = desc->min;
784                         regulators[index].uV_step = desc->step;
785                 }
786
787                 config.dev = max8998->dev;
788                 config.init_data = pdata->regulators[i].initdata;
789                 config.driver_data = max8998;
790
791                 rdev[i] = regulator_register(&regulators[index], &config);
792                 if (IS_ERR(rdev[i])) {
793                         ret = PTR_ERR(rdev[i]);
794                         dev_err(max8998->dev, "regulator init failed\n");
795                         rdev[i] = NULL;
796                         goto err;
797                 }
798         }
799
800
801         return 0;
802 err:
803         while (--i >= 0)
804                 regulator_unregister(rdev[i]);
805 err_out:
806         return ret;
807 }
808
809 static int max8998_pmic_remove(struct platform_device *pdev)
810 {
811         struct max8998_data *max8998 = platform_get_drvdata(pdev);
812         struct regulator_dev **rdev = max8998->rdev;
813         int i;
814
815         for (i = 0; i < max8998->num_regulators; i++)
816                 regulator_unregister(rdev[i]);
817         return 0;
818 }
819
820 static const struct platform_device_id max8998_pmic_id[] = {
821         { "max8998-pmic", TYPE_MAX8998 },
822         { "lp3974-pmic", TYPE_LP3974 },
823         { }
824 };
825 MODULE_DEVICE_TABLE(platform, max8998_pmic_id);
826
827 static struct platform_driver max8998_pmic_driver = {
828         .driver = {
829                 .name = "max8998-pmic",
830                 .owner = THIS_MODULE,
831         },
832         .probe = max8998_pmic_probe,
833         .remove = max8998_pmic_remove,
834         .id_table = max8998_pmic_id,
835 };
836
837 static int __init max8998_pmic_init(void)
838 {
839         return platform_driver_register(&max8998_pmic_driver);
840 }
841 subsys_initcall(max8998_pmic_init);
842
843 static void __exit max8998_pmic_cleanup(void)
844 {
845         platform_driver_unregister(&max8998_pmic_driver);
846 }
847 module_exit(max8998_pmic_cleanup);
848
849 MODULE_DESCRIPTION("MAXIM 8998 voltage regulator driver");
850 MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>");
851 MODULE_LICENSE("GPL");