regulator: Add MODULE_DEVICE_TABLE to max8997 and max8998
[linux-2.6.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/delay.h>
32 #include <linux/platform_device.h>
33 #include <linux/regulator/driver.h>
34 #include <linux/mfd/max8998.h>
35 #include <linux/mfd/max8998-private.h>
36
37 struct max8998_data {
38         struct device           *dev;
39         struct max8998_dev      *iodev;
40         int                     num_regulators;
41         struct regulator_dev    **rdev;
42         u8                      buck1_vol[4]; /* voltages for selection */
43         u8                      buck2_vol[2];
44         unsigned int            buck1_idx; /* index to last changed voltage */
45                                            /* value in a set */
46         unsigned int            buck2_idx;
47 };
48
49 struct voltage_map_desc {
50         int min;
51         int max;
52         int step;
53 };
54
55 /* Voltage maps */
56 static const struct voltage_map_desc ldo23_voltage_map_desc = {
57         .min = 800,     .step = 50,     .max = 1300,
58 };
59 static const struct voltage_map_desc ldo456711_voltage_map_desc = {
60         .min = 1600,    .step = 100,    .max = 3600,
61 };
62 static const struct voltage_map_desc ldo8_voltage_map_desc = {
63         .min = 3000,    .step = 100,    .max = 3600,
64 };
65 static const struct voltage_map_desc ldo9_voltage_map_desc = {
66         .min = 2800,    .step = 100,    .max = 3100,
67 };
68 static const struct voltage_map_desc ldo10_voltage_map_desc = {
69         .min = 950,     .step = 50,     .max = 1300,
70 };
71 static const struct voltage_map_desc ldo1213_voltage_map_desc = {
72         .min = 800,     .step = 100,    .max = 3300,
73 };
74 static const struct voltage_map_desc ldo1415_voltage_map_desc = {
75         .min = 1200,    .step = 100,    .max = 3300,
76 };
77 static const struct voltage_map_desc ldo1617_voltage_map_desc = {
78         .min = 1600,    .step = 100,    .max = 3600,
79 };
80 static const struct voltage_map_desc buck12_voltage_map_desc = {
81         .min = 750,     .step = 25,     .max = 1525,
82 };
83 static const struct voltage_map_desc buck3_voltage_map_desc = {
84         .min = 1600,    .step = 100,    .max = 3600,
85 };
86 static const struct voltage_map_desc buck4_voltage_map_desc = {
87         .min = 800,     .step = 100,    .max = 2300,
88 };
89
90 static const struct voltage_map_desc *ldo_voltage_map[] = {
91         NULL,
92         NULL,
93         &ldo23_voltage_map_desc,        /* LDO2 */
94         &ldo23_voltage_map_desc,        /* LDO3 */
95         &ldo456711_voltage_map_desc,    /* LDO4 */
96         &ldo456711_voltage_map_desc,    /* LDO5 */
97         &ldo456711_voltage_map_desc,    /* LDO6 */
98         &ldo456711_voltage_map_desc,    /* LDO7 */
99         &ldo8_voltage_map_desc,         /* LDO8 */
100         &ldo9_voltage_map_desc,         /* LDO9 */
101         &ldo10_voltage_map_desc,        /* LDO10 */
102         &ldo456711_voltage_map_desc,    /* LDO11 */
103         &ldo1213_voltage_map_desc,      /* LDO12 */
104         &ldo1213_voltage_map_desc,      /* LDO13 */
105         &ldo1415_voltage_map_desc,      /* LDO14 */
106         &ldo1415_voltage_map_desc,      /* LDO15 */
107         &ldo1617_voltage_map_desc,      /* LDO16 */
108         &ldo1617_voltage_map_desc,      /* LDO17 */
109         &buck12_voltage_map_desc,       /* BUCK1 */
110         &buck12_voltage_map_desc,       /* BUCK2 */
111         &buck3_voltage_map_desc,        /* BUCK3 */
112         &buck4_voltage_map_desc,        /* BUCK4 */
113 };
114
115 static inline int max8998_get_ldo(struct regulator_dev *rdev)
116 {
117         return rdev_get_id(rdev);
118 }
119
120 static int max8998_list_voltage(struct regulator_dev *rdev,
121                                 unsigned int selector)
122 {
123         const struct voltage_map_desc *desc;
124         int ldo = max8998_get_ldo(rdev);
125         int val;
126
127         if (ldo >= ARRAY_SIZE(ldo_voltage_map))
128                 return -EINVAL;
129
130         desc = ldo_voltage_map[ldo];
131         if (desc == NULL)
132                 return -EINVAL;
133
134         val = desc->min + desc->step * selector;
135         if (val > desc->max)
136                 return -EINVAL;
137
138         return val * 1000;
139 }
140
141 static int max8998_get_enable_register(struct regulator_dev *rdev,
142                                         int *reg, int *shift)
143 {
144         int ldo = max8998_get_ldo(rdev);
145
146         switch (ldo) {
147         case MAX8998_LDO2 ... MAX8998_LDO5:
148                 *reg = MAX8998_REG_ONOFF1;
149                 *shift = 3 - (ldo - MAX8998_LDO2);
150                 break;
151         case MAX8998_LDO6 ... MAX8998_LDO13:
152                 *reg = MAX8998_REG_ONOFF2;
153                 *shift = 7 - (ldo - MAX8998_LDO6);
154                 break;
155         case MAX8998_LDO14 ... MAX8998_LDO17:
156                 *reg = MAX8998_REG_ONOFF3;
157                 *shift = 7 - (ldo - MAX8998_LDO14);
158                 break;
159         case MAX8998_BUCK1 ... MAX8998_BUCK4:
160                 *reg = MAX8998_REG_ONOFF1;
161                 *shift = 7 - (ldo - MAX8998_BUCK1);
162                 break;
163         case MAX8998_EN32KHZ_AP ... MAX8998_ENVICHG:
164                 *reg = MAX8998_REG_ONOFF4;
165                 *shift = 7 - (ldo - MAX8998_EN32KHZ_AP);
166                 break;
167         case MAX8998_ESAFEOUT1 ... MAX8998_ESAFEOUT2:
168                 *reg = MAX8998_REG_CHGR2;
169                 *shift = 7 - (ldo - MAX8998_ESAFEOUT1);
170                 break;
171         default:
172                 return -EINVAL;
173         }
174
175         return 0;
176 }
177
178 static int max8998_ldo_is_enabled(struct regulator_dev *rdev)
179 {
180         struct max8998_data *max8998 = rdev_get_drvdata(rdev);
181         struct i2c_client *i2c = max8998->iodev->i2c;
182         int ret, reg, shift = 8;
183         u8 val;
184
185         ret = max8998_get_enable_register(rdev, &reg, &shift);
186         if (ret)
187                 return ret;
188
189         ret = max8998_read_reg(i2c, reg, &val);
190         if (ret)
191                 return ret;
192
193         return val & (1 << shift);
194 }
195
196 static int max8998_ldo_enable(struct regulator_dev *rdev)
197 {
198         struct max8998_data *max8998 = rdev_get_drvdata(rdev);
199         struct i2c_client *i2c = max8998->iodev->i2c;
200         int reg, shift = 8, ret;
201
202         ret = max8998_get_enable_register(rdev, &reg, &shift);
203         if (ret)
204                 return ret;
205
206         return max8998_update_reg(i2c, reg, 1<<shift, 1<<shift);
207 }
208
209 static int max8998_ldo_disable(struct regulator_dev *rdev)
210 {
211         struct max8998_data *max8998 = rdev_get_drvdata(rdev);
212         struct i2c_client *i2c = max8998->iodev->i2c;
213         int reg, shift = 8, ret;
214
215         ret = max8998_get_enable_register(rdev, &reg, &shift);
216         if (ret)
217                 return ret;
218
219         return max8998_update_reg(i2c, reg, 0, 1<<shift);
220 }
221
222 static int max8998_get_voltage_register(struct regulator_dev *rdev,
223                                 int *_reg, int *_shift, int *_mask)
224 {
225         int ldo = max8998_get_ldo(rdev);
226         struct max8998_data *max8998 = rdev_get_drvdata(rdev);
227         int reg, shift = 0, mask = 0xff;
228
229         switch (ldo) {
230         case MAX8998_LDO2 ... MAX8998_LDO3:
231                 reg = MAX8998_REG_LDO2_LDO3;
232                 mask = 0xf;
233                 if (ldo == MAX8998_LDO2)
234                         shift = 4;
235                 else
236                         shift = 0;
237                 break;
238         case MAX8998_LDO4 ... MAX8998_LDO7:
239                 reg = MAX8998_REG_LDO4 + (ldo - MAX8998_LDO4);
240                 break;
241         case MAX8998_LDO8 ... MAX8998_LDO9:
242                 reg = MAX8998_REG_LDO8_LDO9;
243                 mask = 0xf;
244                 if (ldo == MAX8998_LDO8)
245                         shift = 4;
246                 else
247                         shift = 0;
248                 break;
249         case MAX8998_LDO10 ... MAX8998_LDO11:
250                 reg = MAX8998_REG_LDO10_LDO11;
251                 if (ldo == MAX8998_LDO10) {
252                         shift = 5;
253                         mask = 0x7;
254                 } else {
255                         shift = 0;
256                         mask = 0x1f;
257                 }
258                 break;
259         case MAX8998_LDO12 ... MAX8998_LDO17:
260                 reg = MAX8998_REG_LDO12 + (ldo - MAX8998_LDO12);
261                 break;
262         case MAX8998_BUCK1:
263                 reg = MAX8998_REG_BUCK1_VOLTAGE1 + max8998->buck1_idx;
264                 break;
265         case MAX8998_BUCK2:
266                 reg = MAX8998_REG_BUCK2_VOLTAGE1 + max8998->buck2_idx;
267                 break;
268         case MAX8998_BUCK3:
269                 reg = MAX8998_REG_BUCK3;
270                 break;
271         case MAX8998_BUCK4:
272                 reg = MAX8998_REG_BUCK4;
273                 break;
274         default:
275                 return -EINVAL;
276         }
277
278         *_reg = reg;
279         *_shift = shift;
280         *_mask = mask;
281
282         return 0;
283 }
284
285 static int max8998_get_voltage(struct regulator_dev *rdev)
286 {
287         struct max8998_data *max8998 = rdev_get_drvdata(rdev);
288         struct i2c_client *i2c = max8998->iodev->i2c;
289         int reg, shift = 0, mask, ret;
290         u8 val;
291
292         ret = max8998_get_voltage_register(rdev, &reg, &shift, &mask);
293         if (ret)
294                 return ret;
295
296         ret = max8998_read_reg(i2c, reg, &val);
297         if (ret)
298                 return ret;
299
300         val >>= shift;
301         val &= mask;
302
303         return max8998_list_voltage(rdev, val);
304 }
305
306 static int max8998_set_voltage_ldo(struct regulator_dev *rdev,
307                                    int min_uV, int max_uV, unsigned *selector)
308 {
309         struct max8998_data *max8998 = rdev_get_drvdata(rdev);
310         struct i2c_client *i2c = max8998->iodev->i2c;
311         int min_vol = min_uV / 1000, max_vol = max_uV / 1000;
312         const struct voltage_map_desc *desc;
313         int ldo = max8998_get_ldo(rdev);
314         int reg, shift = 0, mask, ret;
315         int i = 0;
316
317         if (ldo >= ARRAY_SIZE(ldo_voltage_map))
318                 return -EINVAL;
319
320         desc = ldo_voltage_map[ldo];
321         if (desc == NULL)
322                 return -EINVAL;
323
324         if (max_vol < desc->min || min_vol > desc->max)
325                 return -EINVAL;
326
327         while (desc->min + desc->step*i < min_vol &&
328                desc->min + desc->step*i < desc->max)
329                 i++;
330
331         if (desc->min + desc->step*i > max_vol)
332                 return -EINVAL;
333
334         *selector = i;
335
336         ret = max8998_get_voltage_register(rdev, &reg, &shift, &mask);
337         if (ret)
338                 return ret;
339
340         ret = max8998_update_reg(i2c, reg, i<<shift, mask<<shift);
341
342         return ret;
343 }
344
345 static inline void buck1_gpio_set(int gpio1, int gpio2, int v)
346 {
347         gpio_set_value(gpio1, v & 0x1);
348         gpio_set_value(gpio2, (v >> 1) & 0x1);
349 }
350
351 static inline void buck2_gpio_set(int gpio, int v)
352 {
353         gpio_set_value(gpio, v & 0x1);
354 }
355
356 static int max8998_set_voltage_buck(struct regulator_dev *rdev,
357                                     int min_uV, int max_uV, unsigned *selector)
358 {
359         struct max8998_data *max8998 = rdev_get_drvdata(rdev);
360         struct max8998_platform_data *pdata =
361                 dev_get_platdata(max8998->iodev->dev);
362         struct i2c_client *i2c = max8998->iodev->i2c;
363         int min_vol = min_uV / 1000, max_vol = max_uV / 1000;
364         const struct voltage_map_desc *desc;
365         int buck = max8998_get_ldo(rdev);
366         int reg, shift = 0, mask, ret;
367         int difference = 0, i = 0, j = 0, previous_vol = 0;
368         u8 val = 0;
369         static u8 buck1_last_val;
370
371         if (buck >= ARRAY_SIZE(ldo_voltage_map))
372                 return -EINVAL;
373
374         desc = ldo_voltage_map[buck];
375
376         if (desc == NULL)
377                 return -EINVAL;
378
379         if (max_vol < desc->min || min_vol > desc->max)
380                 return -EINVAL;
381
382         while (desc->min + desc->step*i < min_vol &&
383                desc->min + desc->step*i < desc->max)
384                 i++;
385
386         if (desc->min + desc->step*i > max_vol)
387                 return -EINVAL;
388
389         *selector = i;
390
391         ret = max8998_get_voltage_register(rdev, &reg, &shift, &mask);
392         if (ret)
393                 return ret;
394
395         previous_vol = max8998_get_voltage(rdev);
396
397         /* Check if voltage needs to be changed */
398         /* if previous_voltage equal new voltage, return */
399         if (previous_vol == max8998_list_voltage(rdev, i)) {
400                 dev_dbg(max8998->dev, "No voltage change, old:%d, new:%d\n",
401                         previous_vol, max8998_list_voltage(rdev, i));
402                 return ret;
403         }
404
405         switch (buck) {
406         case MAX8998_BUCK1:
407                 dev_dbg(max8998->dev,
408                         "BUCK1, i:%d, buck1_vol1:%d, buck1_vol2:%d\n\
409                          buck1_vol3:%d, buck1_vol4:%d\n",
410                         i, max8998->buck1_vol[0], max8998->buck1_vol[1],
411                         max8998->buck1_vol[2], max8998->buck1_vol[3]);
412
413                 if (gpio_is_valid(pdata->buck1_set1) &&
414                     gpio_is_valid(pdata->buck1_set2)) {
415
416                         /* check if requested voltage */
417                         /* value is already defined */
418                         for (j = 0; j < ARRAY_SIZE(max8998->buck1_vol); j++) {
419                                 if (max8998->buck1_vol[j] == i) {
420                                         max8998->buck1_idx = j;
421                                         buck1_gpio_set(pdata->buck1_set1,
422                                                        pdata->buck1_set2, j);
423                                         goto buck1_exit;
424                                 }
425                         }
426
427                         if (pdata->buck_voltage_lock)
428                                 return -EINVAL;
429
430                         /* no predefine regulator found */
431                         max8998->buck1_idx = (buck1_last_val % 2) + 2;
432                         dev_dbg(max8998->dev, "max8998->buck1_idx:%d\n",
433                                 max8998->buck1_idx);
434                         max8998->buck1_vol[max8998->buck1_idx] = i;
435                         ret = max8998_get_voltage_register(rdev, &reg,
436                                                            &shift,
437                                                            &mask);
438                         ret = max8998_write_reg(i2c, reg, i);
439                         buck1_gpio_set(pdata->buck1_set1,
440                                        pdata->buck1_set2, max8998->buck1_idx);
441                         buck1_last_val++;
442 buck1_exit:
443                         dev_dbg(max8998->dev, "%s: SET1:%d, SET2:%d\n",
444                                 i2c->name, gpio_get_value(pdata->buck1_set1),
445                                 gpio_get_value(pdata->buck1_set2));
446                         break;
447                 } else {
448                         ret = max8998_write_reg(i2c, reg, i);
449                 }
450                 break;
451
452         case MAX8998_BUCK2:
453                 dev_dbg(max8998->dev,
454                         "BUCK2, i:%d buck2_vol1:%d, buck2_vol2:%d\n"
455                         , i, max8998->buck2_vol[0], max8998->buck2_vol[1]);
456                 if (gpio_is_valid(pdata->buck2_set3)) {
457
458                         /* check if requested voltage */
459                         /* value is already defined */
460                         for (j = 0; j < ARRAY_SIZE(max8998->buck2_vol); j++) {
461                                 if (max8998->buck2_vol[j] == i) {
462                                         max8998->buck2_idx = j;
463                                         buck2_gpio_set(pdata->buck2_set3, j);
464                                         goto buck2_exit;
465                                 }
466                         }
467
468                         if (pdata->buck_voltage_lock)
469                                 return -EINVAL;
470
471                         max8998_get_voltage_register(rdev,
472                                         &reg, &shift, &mask);
473                         ret = max8998_write_reg(i2c, reg, i);
474                         max8998->buck2_vol[max8998->buck2_idx] = i;
475                         buck2_gpio_set(pdata->buck2_set3, max8998->buck2_idx);
476 buck2_exit:
477                         dev_dbg(max8998->dev, "%s: SET3:%d\n", i2c->name,
478                                 gpio_get_value(pdata->buck2_set3));
479                 } else {
480                         ret = max8998_write_reg(i2c, reg, i);
481                 }
482                 break;
483
484         case MAX8998_BUCK3:
485         case MAX8998_BUCK4:
486                 ret = max8998_update_reg(i2c, reg, i<<shift, mask<<shift);
487                 break;
488         }
489
490         /* Voltage stabilization */
491         max8998_read_reg(i2c, MAX8998_REG_ONOFF4, &val);
492
493         /* lp3974 hasn't got ENRAMP bit - ramp is assumed as true */
494         /* MAX8998 has ENRAMP bit implemented, so test it*/
495         if (max8998->iodev->type == TYPE_MAX8998 && !(val & MAX8998_ENRAMP))
496                 return ret;
497
498         difference = desc->min + desc->step*i - previous_vol/1000;
499         if (difference > 0)
500                 udelay(difference / ((val & 0x0f) + 1));
501
502         return ret;
503 }
504
505 static struct regulator_ops max8998_ldo_ops = {
506         .list_voltage           = max8998_list_voltage,
507         .is_enabled             = max8998_ldo_is_enabled,
508         .enable                 = max8998_ldo_enable,
509         .disable                = max8998_ldo_disable,
510         .get_voltage            = max8998_get_voltage,
511         .set_voltage            = max8998_set_voltage_ldo,
512         .set_suspend_enable     = max8998_ldo_enable,
513         .set_suspend_disable    = max8998_ldo_disable,
514 };
515
516 static struct regulator_ops max8998_buck_ops = {
517         .list_voltage           = max8998_list_voltage,
518         .is_enabled             = max8998_ldo_is_enabled,
519         .enable                 = max8998_ldo_enable,
520         .disable                = max8998_ldo_disable,
521         .get_voltage            = max8998_get_voltage,
522         .set_voltage            = max8998_set_voltage_buck,
523         .set_suspend_enable     = max8998_ldo_enable,
524         .set_suspend_disable    = max8998_ldo_disable,
525 };
526
527 static struct regulator_ops max8998_others_ops = {
528         .is_enabled             = max8998_ldo_is_enabled,
529         .enable                 = max8998_ldo_enable,
530         .disable                = max8998_ldo_disable,
531         .set_suspend_enable     = max8998_ldo_enable,
532         .set_suspend_disable    = max8998_ldo_disable,
533 };
534
535 static struct regulator_desc regulators[] = {
536         {
537                 .name           = "LDO2",
538                 .id             = MAX8998_LDO2,
539                 .ops            = &max8998_ldo_ops,
540                 .type           = REGULATOR_VOLTAGE,
541                 .owner          = THIS_MODULE,
542         }, {
543                 .name           = "LDO3",
544                 .id             = MAX8998_LDO3,
545                 .ops            = &max8998_ldo_ops,
546                 .type           = REGULATOR_VOLTAGE,
547                 .owner          = THIS_MODULE,
548         }, {
549                 .name           = "LDO4",
550                 .id             = MAX8998_LDO4,
551                 .ops            = &max8998_ldo_ops,
552                 .type           = REGULATOR_VOLTAGE,
553                 .owner          = THIS_MODULE,
554         }, {
555                 .name           = "LDO5",
556                 .id             = MAX8998_LDO5,
557                 .ops            = &max8998_ldo_ops,
558                 .type           = REGULATOR_VOLTAGE,
559                 .owner          = THIS_MODULE,
560         }, {
561                 .name           = "LDO6",
562                 .id             = MAX8998_LDO6,
563                 .ops            = &max8998_ldo_ops,
564                 .type           = REGULATOR_VOLTAGE,
565                 .owner          = THIS_MODULE,
566         }, {
567                 .name           = "LDO7",
568                 .id             = MAX8998_LDO7,
569                 .ops            = &max8998_ldo_ops,
570                 .type           = REGULATOR_VOLTAGE,
571                 .owner          = THIS_MODULE,
572         }, {
573                 .name           = "LDO8",
574                 .id             = MAX8998_LDO8,
575                 .ops            = &max8998_ldo_ops,
576                 .type           = REGULATOR_VOLTAGE,
577                 .owner          = THIS_MODULE,
578         }, {
579                 .name           = "LDO9",
580                 .id             = MAX8998_LDO9,
581                 .ops            = &max8998_ldo_ops,
582                 .type           = REGULATOR_VOLTAGE,
583                 .owner          = THIS_MODULE,
584         }, {
585                 .name           = "LDO10",
586                 .id             = MAX8998_LDO10,
587                 .ops            = &max8998_ldo_ops,
588                 .type           = REGULATOR_VOLTAGE,
589                 .owner          = THIS_MODULE,
590         }, {
591                 .name           = "LDO11",
592                 .id             = MAX8998_LDO11,
593                 .ops            = &max8998_ldo_ops,
594                 .type           = REGULATOR_VOLTAGE,
595                 .owner          = THIS_MODULE,
596         }, {
597                 .name           = "LDO12",
598                 .id             = MAX8998_LDO12,
599                 .ops            = &max8998_ldo_ops,
600                 .type           = REGULATOR_VOLTAGE,
601                 .owner          = THIS_MODULE,
602         }, {
603                 .name           = "LDO13",
604                 .id             = MAX8998_LDO13,
605                 .ops            = &max8998_ldo_ops,
606                 .type           = REGULATOR_VOLTAGE,
607                 .owner          = THIS_MODULE,
608         }, {
609                 .name           = "LDO14",
610                 .id             = MAX8998_LDO14,
611                 .ops            = &max8998_ldo_ops,
612                 .type           = REGULATOR_VOLTAGE,
613                 .owner          = THIS_MODULE,
614         }, {
615                 .name           = "LDO15",
616                 .id             = MAX8998_LDO15,
617                 .ops            = &max8998_ldo_ops,
618                 .type           = REGULATOR_VOLTAGE,
619                 .owner          = THIS_MODULE,
620         }, {
621                 .name           = "LDO16",
622                 .id             = MAX8998_LDO16,
623                 .ops            = &max8998_ldo_ops,
624                 .type           = REGULATOR_VOLTAGE,
625                 .owner          = THIS_MODULE,
626         }, {
627                 .name           = "LDO17",
628                 .id             = MAX8998_LDO17,
629                 .ops            = &max8998_ldo_ops,
630                 .type           = REGULATOR_VOLTAGE,
631                 .owner          = THIS_MODULE,
632         }, {
633                 .name           = "BUCK1",
634                 .id             = MAX8998_BUCK1,
635                 .ops            = &max8998_buck_ops,
636                 .type           = REGULATOR_VOLTAGE,
637                 .owner          = THIS_MODULE,
638         }, {
639                 .name           = "BUCK2",
640                 .id             = MAX8998_BUCK2,
641                 .ops            = &max8998_buck_ops,
642                 .type           = REGULATOR_VOLTAGE,
643                 .owner          = THIS_MODULE,
644         }, {
645                 .name           = "BUCK3",
646                 .id             = MAX8998_BUCK3,
647                 .ops            = &max8998_buck_ops,
648                 .type           = REGULATOR_VOLTAGE,
649                 .owner          = THIS_MODULE,
650         }, {
651                 .name           = "BUCK4",
652                 .id             = MAX8998_BUCK4,
653                 .ops            = &max8998_buck_ops,
654                 .type           = REGULATOR_VOLTAGE,
655                 .owner          = THIS_MODULE,
656         }, {
657                 .name           = "EN32KHz AP",
658                 .id             = MAX8998_EN32KHZ_AP,
659                 .ops            = &max8998_others_ops,
660                 .type           = REGULATOR_VOLTAGE,
661                 .owner          = THIS_MODULE,
662         }, {
663                 .name           = "EN32KHz CP",
664                 .id             = MAX8998_EN32KHZ_CP,
665                 .ops            = &max8998_others_ops,
666                 .type           = REGULATOR_VOLTAGE,
667                 .owner          = THIS_MODULE,
668         }, {
669                 .name           = "ENVICHG",
670                 .id             = MAX8998_ENVICHG,
671                 .ops            = &max8998_others_ops,
672                 .type           = REGULATOR_VOLTAGE,
673                 .owner          = THIS_MODULE,
674         }, {
675                 .name           = "ESAFEOUT1",
676                 .id             = MAX8998_ESAFEOUT1,
677                 .ops            = &max8998_others_ops,
678                 .type           = REGULATOR_VOLTAGE,
679                 .owner          = THIS_MODULE,
680         }, {
681                 .name           = "ESAFEOUT2",
682                 .id             = MAX8998_ESAFEOUT2,
683                 .ops            = &max8998_others_ops,
684                 .type           = REGULATOR_VOLTAGE,
685                 .owner          = THIS_MODULE,
686         }
687 };
688
689 static __devinit int max8998_pmic_probe(struct platform_device *pdev)
690 {
691         struct max8998_dev *iodev = dev_get_drvdata(pdev->dev.parent);
692         struct max8998_platform_data *pdata = dev_get_platdata(iodev->dev);
693         struct regulator_dev **rdev;
694         struct max8998_data *max8998;
695         struct i2c_client *i2c;
696         int i, ret, size;
697
698         if (!pdata) {
699                 dev_err(pdev->dev.parent, "No platform init data supplied\n");
700                 return -ENODEV;
701         }
702
703         max8998 = kzalloc(sizeof(struct max8998_data), GFP_KERNEL);
704         if (!max8998)
705                 return -ENOMEM;
706
707         size = sizeof(struct regulator_dev *) * pdata->num_regulators;
708         max8998->rdev = kzalloc(size, GFP_KERNEL);
709         if (!max8998->rdev) {
710                 kfree(max8998);
711                 return -ENOMEM;
712         }
713
714         rdev = max8998->rdev;
715         max8998->dev = &pdev->dev;
716         max8998->iodev = iodev;
717         max8998->num_regulators = pdata->num_regulators;
718         platform_set_drvdata(pdev, max8998);
719         i2c = max8998->iodev->i2c;
720
721         max8998->buck1_idx = pdata->buck1_default_idx;
722         max8998->buck2_idx = pdata->buck2_default_idx;
723
724         /* NOTE: */
725         /* For unused GPIO NOT marked as -1 (thereof equal to 0)  WARN_ON */
726         /* will be displayed */
727
728         /* Check if MAX8998 voltage selection GPIOs are defined */
729         if (gpio_is_valid(pdata->buck1_set1) &&
730             gpio_is_valid(pdata->buck1_set2)) {
731                 /* Check if SET1 is not equal to 0 */
732                 if (!pdata->buck1_set1) {
733                         printk(KERN_ERR "MAX8998 SET1 GPIO defined as 0 !\n");
734                         WARN_ON(!pdata->buck1_set1);
735                         return -EIO;
736                 }
737                 /* Check if SET2 is not equal to 0 */
738                 if (!pdata->buck1_set2) {
739                         printk(KERN_ERR "MAX8998 SET2 GPIO defined as 0 !\n");
740                         WARN_ON(!pdata->buck1_set2);
741                         return -EIO;
742                 }
743
744                 gpio_request(pdata->buck1_set1, "MAX8998 BUCK1_SET1");
745                 gpio_direction_output(pdata->buck1_set1,
746                                       max8998->buck1_idx & 0x1);
747
748
749                 gpio_request(pdata->buck1_set2, "MAX8998 BUCK1_SET2");
750                 gpio_direction_output(pdata->buck1_set2,
751                                       (max8998->buck1_idx >> 1) & 0x1);
752                 /* Set predefined value for BUCK1 register 1 */
753                 i = 0;
754                 while (buck12_voltage_map_desc.min +
755                        buck12_voltage_map_desc.step*i
756                        < (pdata->buck1_voltage1 / 1000))
757                         i++;
758                 max8998->buck1_vol[0] = i;
759                 ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE1, i);
760                 if (ret)
761                         return ret;
762
763                 /* Set predefined value for BUCK1 register 2 */
764                 i = 0;
765                 while (buck12_voltage_map_desc.min +
766                        buck12_voltage_map_desc.step*i
767                        < (pdata->buck1_voltage2 / 1000))
768                         i++;
769
770                 max8998->buck1_vol[1] = i;
771                 ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE2, i);
772                 if (ret)
773                         return ret;
774
775                 /* Set predefined value for BUCK1 register 3 */
776                 i = 0;
777                 while (buck12_voltage_map_desc.min +
778                        buck12_voltage_map_desc.step*i
779                        < (pdata->buck1_voltage3 / 1000))
780                         i++;
781
782                 max8998->buck1_vol[2] = i;
783                 ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE3, i);
784                 if (ret)
785                         return ret;
786
787                 /* Set predefined value for BUCK1 register 4 */
788                 i = 0;
789                 while (buck12_voltage_map_desc.min +
790                        buck12_voltage_map_desc.step*i
791                        < (pdata->buck1_voltage4 / 1000))
792                         i++;
793
794                 max8998->buck1_vol[3] = i;
795                 ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE4, i);
796                 if (ret)
797                         return ret;
798
799         }
800
801         if (gpio_is_valid(pdata->buck2_set3)) {
802                 /* Check if SET3 is not equal to 0 */
803                 if (!pdata->buck2_set3) {
804                         printk(KERN_ERR "MAX8998 SET3 GPIO defined as 0 !\n");
805                         WARN_ON(!pdata->buck2_set3);
806                         return -EIO;
807                 }
808                 gpio_request(pdata->buck2_set3, "MAX8998 BUCK2_SET3");
809                 gpio_direction_output(pdata->buck2_set3,
810                                       max8998->buck2_idx & 0x1);
811
812                 /* BUCK2 register 1 */
813                 i = 0;
814                 while (buck12_voltage_map_desc.min +
815                        buck12_voltage_map_desc.step*i
816                        < (pdata->buck2_voltage1 / 1000))
817                         i++;
818                 max8998->buck2_vol[0] = i;
819                 ret = max8998_write_reg(i2c, MAX8998_REG_BUCK2_VOLTAGE1, i);
820                 if (ret)
821                         return ret;
822
823                 /* BUCK2 register 2 */
824                 i = 0;
825                 while (buck12_voltage_map_desc.min +
826                        buck12_voltage_map_desc.step*i
827                        < (pdata->buck2_voltage2 / 1000))
828                         i++;
829                 printk(KERN_ERR "i2:%d, buck2_idx:%d\n", i, max8998->buck2_idx);
830                 max8998->buck2_vol[1] = i;
831                 ret = max8998_write_reg(i2c, MAX8998_REG_BUCK2_VOLTAGE2, i);
832                 if (ret)
833                         return ret;
834         }
835
836         for (i = 0; i < pdata->num_regulators; i++) {
837                 const struct voltage_map_desc *desc;
838                 int id = pdata->regulators[i].id;
839                 int index = id - MAX8998_LDO2;
840
841                 desc = ldo_voltage_map[id];
842                 if (desc && regulators[index].ops != &max8998_others_ops) {
843                         int count = (desc->max - desc->min) / desc->step + 1;
844                         regulators[index].n_voltages = count;
845                 }
846                 rdev[i] = regulator_register(&regulators[index], max8998->dev,
847                                 pdata->regulators[i].initdata, max8998);
848                 if (IS_ERR(rdev[i])) {
849                         ret = PTR_ERR(rdev[i]);
850                         dev_err(max8998->dev, "regulator init failed\n");
851                         rdev[i] = NULL;
852                         goto err;
853                 }
854         }
855
856
857         return 0;
858 err:
859         for (i = 0; i < max8998->num_regulators; i++)
860                 if (rdev[i])
861                         regulator_unregister(rdev[i]);
862
863         kfree(max8998->rdev);
864         kfree(max8998);
865
866         return ret;
867 }
868
869 static int __devexit max8998_pmic_remove(struct platform_device *pdev)
870 {
871         struct max8998_data *max8998 = platform_get_drvdata(pdev);
872         struct regulator_dev **rdev = max8998->rdev;
873         int i;
874
875         for (i = 0; i < max8998->num_regulators; i++)
876                 if (rdev[i])
877                         regulator_unregister(rdev[i]);
878
879         kfree(max8998->rdev);
880         kfree(max8998);
881
882         return 0;
883 }
884
885 static const struct platform_device_id max8998_pmic_id[] = {
886         { "max8998-pmic", TYPE_MAX8998 },
887         { "lp3974-pmic", TYPE_LP3974 },
888         { }
889 };
890 MODULE_DEVICE_TABLE(platform, max8998_pmic_id);
891
892 static struct platform_driver max8998_pmic_driver = {
893         .driver = {
894                 .name = "max8998-pmic",
895                 .owner = THIS_MODULE,
896         },
897         .probe = max8998_pmic_probe,
898         .remove = __devexit_p(max8998_pmic_remove),
899         .id_table = max8998_pmic_id,
900 };
901
902 static int __init max8998_pmic_init(void)
903 {
904         return platform_driver_register(&max8998_pmic_driver);
905 }
906 subsys_initcall(max8998_pmic_init);
907
908 static void __exit max8998_pmic_cleanup(void)
909 {
910         platform_driver_unregister(&max8998_pmic_driver);
911 }
912 module_exit(max8998_pmic_cleanup);
913
914 MODULE_DESCRIPTION("MAXIM 8998 voltage regulator driver");
915 MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>");
916 MODULE_LICENSE("GPL");