regulator: s5m8767: Add missing breaks
[linux-2.6.git] / drivers / regulator / s5m8767.c
1 /*
2  * s5m8767.c
3  *
4  * Copyright (c) 2011 Samsung Electronics Co., Ltd
5  *              http://www.samsung.com
6  *
7  *  This program is free software; you can redistribute  it and/or modify it
8  *  under  the terms of  the GNU General  Public License as published by the
9  *  Free Software Foundation;  either version 2 of the  License, or (at your
10  *  option) any later version.
11  *
12  */
13
14 #include <linux/bug.h>
15 #include <linux/delay.h>
16 #include <linux/err.h>
17 #include <linux/gpio.h>
18 #include <linux/slab.h>
19 #include <linux/module.h>
20 #include <linux/platform_device.h>
21 #include <linux/regulator/driver.h>
22 #include <linux/regulator/machine.h>
23 #include <linux/mfd/s5m87xx/s5m-core.h>
24 #include <linux/mfd/s5m87xx/s5m-pmic.h>
25
26 struct s5m8767_info {
27         struct device *dev;
28         struct s5m87xx_dev *iodev;
29         int num_regulators;
30         struct regulator_dev **rdev;
31
32         int ramp_delay;
33         bool buck2_ramp;
34         bool buck3_ramp;
35         bool buck4_ramp;
36
37         bool buck2_gpiodvs;
38         bool buck3_gpiodvs;
39         bool buck4_gpiodvs;
40         u8 buck2_vol[8];
41         u8 buck3_vol[8];
42         u8 buck4_vol[8];
43         int buck_gpios[3];
44         int buck_gpioindex;
45 };
46
47 struct s5m_voltage_desc {
48         int max;
49         int min;
50         int step;
51 };
52
53 static const struct s5m_voltage_desc buck_voltage_val1 = {
54         .max = 2225000,
55         .min =  650000,
56         .step =   6250,
57 };
58
59 static const struct s5m_voltage_desc buck_voltage_val2 = {
60         .max = 1600000,
61         .min =  600000,
62         .step =   6250,
63 };
64
65 static const struct s5m_voltage_desc buck_voltage_val3 = {
66         .max = 3000000,
67         .min =  750000,
68         .step =  12500,
69 };
70
71 static const struct s5m_voltage_desc ldo_voltage_val1 = {
72         .max = 3950000,
73         .min =  800000,
74         .step =  50000,
75 };
76
77 static const struct s5m_voltage_desc ldo_voltage_val2 = {
78         .max = 2375000,
79         .min =  800000,
80         .step =  25000,
81 };
82
83 static const struct s5m_voltage_desc *reg_voltage_map[] = {
84         [S5M8767_LDO1] = &ldo_voltage_val2,
85         [S5M8767_LDO2] = &ldo_voltage_val2,
86         [S5M8767_LDO3] = &ldo_voltage_val1,
87         [S5M8767_LDO4] = &ldo_voltage_val1,
88         [S5M8767_LDO5] = &ldo_voltage_val1,
89         [S5M8767_LDO6] = &ldo_voltage_val2,
90         [S5M8767_LDO7] = &ldo_voltage_val2,
91         [S5M8767_LDO8] = &ldo_voltage_val2,
92         [S5M8767_LDO9] = &ldo_voltage_val1,
93         [S5M8767_LDO10] = &ldo_voltage_val1,
94         [S5M8767_LDO11] = &ldo_voltage_val1,
95         [S5M8767_LDO12] = &ldo_voltage_val1,
96         [S5M8767_LDO13] = &ldo_voltage_val1,
97         [S5M8767_LDO14] = &ldo_voltage_val1,
98         [S5M8767_LDO15] = &ldo_voltage_val2,
99         [S5M8767_LDO16] = &ldo_voltage_val1,
100         [S5M8767_LDO17] = &ldo_voltage_val1,
101         [S5M8767_LDO18] = &ldo_voltage_val1,
102         [S5M8767_LDO19] = &ldo_voltage_val1,
103         [S5M8767_LDO20] = &ldo_voltage_val1,
104         [S5M8767_LDO21] = &ldo_voltage_val1,
105         [S5M8767_LDO22] = &ldo_voltage_val1,
106         [S5M8767_LDO23] = &ldo_voltage_val1,
107         [S5M8767_LDO24] = &ldo_voltage_val1,
108         [S5M8767_LDO25] = &ldo_voltage_val1,
109         [S5M8767_LDO26] = &ldo_voltage_val1,
110         [S5M8767_LDO27] = &ldo_voltage_val1,
111         [S5M8767_LDO28] = &ldo_voltage_val1,
112         [S5M8767_BUCK1] = &buck_voltage_val1,
113         [S5M8767_BUCK2] = &buck_voltage_val2,
114         [S5M8767_BUCK3] = &buck_voltage_val2,
115         [S5M8767_BUCK4] = &buck_voltage_val2,
116         [S5M8767_BUCK5] = &buck_voltage_val1,
117         [S5M8767_BUCK6] = &buck_voltage_val1,
118         [S5M8767_BUCK7] = NULL,
119         [S5M8767_BUCK8] = NULL,
120         [S5M8767_BUCK9] = &buck_voltage_val3,
121 };
122
123 static inline int s5m8767_get_reg_id(struct regulator_dev *rdev)
124 {
125         return rdev_get_id(rdev);
126 }
127
128 static int s5m8767_list_voltage(struct regulator_dev *rdev,
129                                 unsigned int selector)
130 {
131         const struct s5m_voltage_desc *desc;
132         int reg_id = s5m8767_get_reg_id(rdev);
133         int val;
134
135         if (reg_id >= ARRAY_SIZE(reg_voltage_map) || reg_id < 0)
136                 return -EINVAL;
137
138         desc = reg_voltage_map[reg_id];
139         if (desc == NULL)
140                 return -EINVAL;
141
142         val = desc->min + desc->step * selector;
143         if (val > desc->max)
144                 return -EINVAL;
145
146         return val;
147 }
148
149 static int s5m8767_get_register(struct regulator_dev *rdev, int *reg)
150 {
151         int reg_id = s5m8767_get_reg_id(rdev);
152
153         switch (reg_id) {
154         case S5M8767_LDO1 ... S5M8767_LDO2:
155                 *reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1);
156                 break;
157         case S5M8767_LDO3 ... S5M8767_LDO28:
158                 *reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3);
159                 break;
160         case S5M8767_BUCK1:
161                 *reg = S5M8767_REG_BUCK1CTRL1;
162                 break;
163         case S5M8767_BUCK2 ... S5M8767_BUCK4:
164                 *reg = S5M8767_REG_BUCK2CTRL + (reg_id - S5M8767_BUCK2) * 9;
165                 break;
166         case S5M8767_BUCK5:
167                 *reg = S5M8767_REG_BUCK5CTRL1;
168                 break;
169         case S5M8767_BUCK6 ... S5M8767_BUCK9:
170                 *reg = S5M8767_REG_BUCK6CTRL1 + (reg_id - S5M8767_BUCK6) * 2;
171                 break;
172         default:
173                 return -EINVAL;
174         }
175
176         return 0;
177 }
178
179 static int s5m8767_reg_is_enabled(struct regulator_dev *rdev)
180 {
181         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
182         int ret, reg;
183         int mask = 0xc0, pattern = 0xc0;
184         u8 val;
185
186         ret = s5m8767_get_register(rdev, &reg);
187         if (ret == -EINVAL)
188                 return 1;
189         else if (ret)
190                 return ret;
191
192         ret = s5m_reg_read(s5m8767->iodev, reg, &val);
193         if (ret)
194                 return ret;
195
196         return (val & mask) == pattern;
197 }
198
199 static int s5m8767_reg_enable(struct regulator_dev *rdev)
200 {
201         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
202         int ret, reg;
203         int mask = 0xc0, pattern = 0xc0;
204
205         ret = s5m8767_get_register(rdev, &reg);
206         if (ret)
207                 return ret;
208
209         return s5m_reg_update(s5m8767->iodev, reg, pattern, mask);
210 }
211
212 static int s5m8767_reg_disable(struct regulator_dev *rdev)
213 {
214         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
215         int ret, reg;
216         int  mask = 0xc0, pattern = 0xc0;
217
218         ret = s5m8767_get_register(rdev, &reg);
219         if (ret)
220                 return ret;
221
222         return s5m_reg_update(s5m8767->iodev, reg, ~pattern, mask);
223 }
224
225 static int s5m8767_get_voltage_register(struct regulator_dev *rdev, int *_reg)
226 {
227         int reg_id = s5m8767_get_reg_id(rdev);
228         int reg;
229
230         switch (reg_id) {
231         case S5M8767_LDO1 ... S5M8767_LDO2:
232                 reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1);
233                 break;
234         case S5M8767_LDO3 ... S5M8767_LDO28:
235                 reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3);
236                 break;
237         case S5M8767_BUCK1:
238                 reg = S5M8767_REG_BUCK1CTRL2;
239                 break;
240         case S5M8767_BUCK2:
241                 reg = S5M8767_REG_BUCK2DVS1;
242                 break;
243         case S5M8767_BUCK3:
244                 reg = S5M8767_REG_BUCK3DVS1;
245                 break;
246         case S5M8767_BUCK4:
247                 reg = S5M8767_REG_BUCK4DVS1;
248                 break;
249         case S5M8767_BUCK5:
250                 reg = S5M8767_REG_BUCK5CTRL2;
251                 break;
252         case S5M8767_BUCK6 ... S5M8767_BUCK9:
253                 reg = S5M8767_REG_BUCK6CTRL2 + (reg_id - S5M8767_BUCK6) * 2;
254                 break;
255         default:
256                 return -EINVAL;
257         }
258
259         *_reg = reg;
260
261         return 0;
262 }
263
264 static int s5m8767_get_voltage_sel(struct regulator_dev *rdev)
265 {
266         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
267         int reg, mask = 0xff, ret;
268         int reg_id = s5m8767_get_reg_id(rdev);
269         u8 val;
270
271         ret = s5m8767_get_voltage_register(rdev, &reg);
272         if (ret)
273                 return ret;
274
275         switch (reg_id) {
276         case S5M8767_LDO1 ... S5M8767_LDO28:
277                 mask = 0x3f;
278                 break;
279         case S5M8767_BUCK2:
280                 if (s5m8767->buck2_gpiodvs)
281                         reg += s5m8767->buck_gpioindex;
282                 break;
283         case S5M8767_BUCK3:
284                 if (s5m8767->buck3_gpiodvs)
285                         reg += s5m8767->buck_gpioindex;
286                 break;
287         case S5M8767_BUCK4:
288                 if (s5m8767->buck4_gpiodvs)
289                         reg += s5m8767->buck_gpioindex;
290                 break;
291         }
292
293         ret = s5m_reg_read(s5m8767->iodev, reg, &val);
294         if (ret)
295                 return ret;
296
297         val &= mask;
298
299         return val;
300 }
301
302 static inline int s5m8767_convert_voltage(
303                 const struct s5m_voltage_desc *desc,
304                 int min_vol, int max_vol)
305 {
306         int out_vol = 0;
307
308         if (desc == NULL)
309                 return -EINVAL;
310
311         if (max_vol < desc->min || min_vol > desc->max)
312                 return -EINVAL;
313
314         out_vol = (min_vol - desc->min) / desc->step;
315
316         if (desc->min + desc->step * out_vol > max_vol)
317                 return -EINVAL;
318
319         return out_vol;
320 }
321
322 static int s5m8767_set_voltage(struct regulator_dev *rdev,
323                                 int min_uV, int max_uV, unsigned *selector)
324 {
325         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
326         int min_vol = min_uV, max_vol = max_uV;
327         const struct s5m_voltage_desc *desc;
328         int reg_id = s5m8767_get_reg_id(rdev);
329         int reg, mask, ret;
330         int i;
331         u8 val;
332
333         switch (reg_id) {
334         case S5M8767_LDO1 ... S5M8767_LDO28:
335                 mask = 0x3f;
336                 break;
337         case S5M8767_BUCK1 ... S5M8767_BUCK6:
338                 mask = 0xff;
339                 break;
340         case S5M8767_BUCK7 ... S5M8767_BUCK8:
341                 return -EINVAL;
342         case S5M8767_BUCK9:
343                 mask = 0xff;
344                 break;
345         default:
346                 return -EINVAL;
347         }
348
349         desc = reg_voltage_map[reg_id];
350
351         i = s5m8767_convert_voltage(desc, min_vol, max_vol);
352         if (i < 0)
353                 return i;
354
355         ret = s5m8767_get_voltage_register(rdev, &reg);
356         if (ret)
357                 return ret;
358
359         s5m_reg_read(s5m8767->iodev, reg, &val);
360         val = val & mask;
361
362         ret = s5m_reg_write(s5m8767->iodev, reg, val);
363         *selector = i;
364
365         return ret;
366 }
367
368 static inline void s5m8767_set_high(struct s5m8767_info *s5m8767)
369 {
370         int temp_index = s5m8767->buck_gpioindex;
371
372         gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
373         gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
374         gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
375 }
376
377 static inline void s5m8767_set_low(struct s5m8767_info *s5m8767)
378 {
379         int temp_index = s5m8767->buck_gpioindex;
380
381         gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
382         gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
383         gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
384 }
385
386 static int s5m8767_set_voltage_buck(struct regulator_dev *rdev,
387                                     int min_uV, int max_uV, unsigned *selector)
388 {
389         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
390         int reg_id = s5m8767_get_reg_id(rdev);
391         const struct s5m_voltage_desc *desc;
392         int new_val, old_val, i = 0;
393         int min_vol = min_uV, max_vol = max_uV;
394
395         if (reg_id < S5M8767_BUCK1 || reg_id > S5M8767_BUCK6)
396                 return -EINVAL;
397
398         switch (reg_id) {
399         case S5M8767_BUCK1:
400                 return s5m8767_set_voltage(rdev, min_uV, max_uV, selector);
401         case S5M8767_BUCK2 ... S5M8767_BUCK4:
402                 break;
403         case S5M8767_BUCK5 ... S5M8767_BUCK6:
404                 return s5m8767_set_voltage(rdev, min_uV, max_uV, selector);
405         case S5M8767_BUCK9:
406                 return s5m8767_set_voltage(rdev, min_uV, max_uV, selector);
407         }
408
409         desc = reg_voltage_map[reg_id];
410         new_val = s5m8767_convert_voltage(desc, min_vol, max_vol);
411         if (new_val < 0)
412                 return new_val;
413
414         switch (reg_id) {
415         case S5M8767_BUCK2:
416                 if (s5m8767->buck2_gpiodvs) {
417                         while (s5m8767->buck2_vol[i] != new_val)
418                                 i++;
419                 } else
420                         return s5m8767_set_voltage(rdev, min_uV,
421                                                    max_uV, selector);
422                 break;
423         case S5M8767_BUCK3:
424                 if (s5m8767->buck3_gpiodvs) {
425                         while (s5m8767->buck3_vol[i] != new_val)
426                                 i++;
427                 } else
428                         return s5m8767_set_voltage(rdev, min_uV,
429                                                    max_uV, selector);
430                 break;
431         case S5M8767_BUCK4:
432                 if (s5m8767->buck3_gpiodvs) {
433                         while (s5m8767->buck4_vol[i] != new_val)
434                                 i++;
435                 } else
436                         return s5m8767_set_voltage(rdev, min_uV,
437                                                    max_uV, selector);
438                 break;
439         }
440
441         old_val = s5m8767->buck_gpioindex;
442         s5m8767->buck_gpioindex = i;
443
444         if (i > old_val)
445                 s5m8767_set_high(s5m8767);
446         else
447                 s5m8767_set_low(s5m8767);
448
449         *selector = new_val;
450         return 0;
451 }
452
453 static int s5m8767_set_voltage_time_sel(struct regulator_dev *rdev,
454                                              unsigned int old_sel,
455                                              unsigned int new_sel)
456 {
457         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
458         const struct s5m_voltage_desc *desc;
459         int reg_id = s5m8767_get_reg_id(rdev);
460         int mask;
461         int new_val, old_val;
462
463         switch (reg_id) {
464         case S5M8767_LDO1 ... S5M8767_LDO28:
465                 mask = 0x3f;
466                 break;
467         case S5M8767_BUCK1 ... S5M8767_BUCK6:
468                 mask = 0xff;
469                 break;
470         case S5M8767_BUCK7 ... S5M8767_BUCK8:
471                 return -EINVAL;
472         case S5M8767_BUCK9:
473                 mask = 0xff;
474                 break;
475         default:
476                 return -EINVAL;
477         }
478         desc = reg_voltage_map[reg_id];
479
480         new_val = s5m8767_convert_voltage(desc, new_sel, new_sel);
481         if (new_val < 0)
482                 return new_val;
483
484         old_val = s5m8767_convert_voltage(desc, old_sel, old_sel);
485         if (old_val < 0)
486                 return old_val;
487
488         if (old_sel < new_sel)
489                 return DIV_ROUND_UP(desc->step * (new_val - old_val),
490                                         s5m8767->ramp_delay);
491         else
492                 return 0;
493 }
494
495 static struct regulator_ops s5m8767_ldo_ops = {
496         .list_voltage           = s5m8767_list_voltage,
497         .is_enabled             = s5m8767_reg_is_enabled,
498         .enable                 = s5m8767_reg_enable,
499         .disable                = s5m8767_reg_disable,
500         .get_voltage_sel        = s5m8767_get_voltage_sel,
501         .set_voltage            = s5m8767_set_voltage,
502         .set_voltage_time_sel   = s5m8767_set_voltage_time_sel,
503 };
504
505 static struct regulator_ops s5m8767_buck_ops = {
506         .list_voltage           = s5m8767_list_voltage,
507         .is_enabled             = s5m8767_reg_is_enabled,
508         .enable                 = s5m8767_reg_enable,
509         .disable                = s5m8767_reg_disable,
510         .get_voltage_sel        = s5m8767_get_voltage_sel,
511         .set_voltage            = s5m8767_set_voltage_buck,
512         .set_voltage_time_sel   = s5m8767_set_voltage_time_sel,
513 };
514
515 #define regulator_desc_ldo(num)         {       \
516         .name           = "LDO"#num,            \
517         .id             = S5M8767_LDO##num,     \
518         .ops            = &s5m8767_ldo_ops,     \
519         .type           = REGULATOR_VOLTAGE,    \
520         .owner          = THIS_MODULE,          \
521 }
522 #define regulator_desc_buck(num)        {       \
523         .name           = "BUCK"#num,           \
524         .id             = S5M8767_BUCK##num,    \
525         .ops            = &s5m8767_buck_ops,    \
526         .type           = REGULATOR_VOLTAGE,    \
527         .owner          = THIS_MODULE,          \
528 }
529
530 static struct regulator_desc regulators[] = {
531         regulator_desc_ldo(1),
532         regulator_desc_ldo(2),
533         regulator_desc_ldo(3),
534         regulator_desc_ldo(4),
535         regulator_desc_ldo(5),
536         regulator_desc_ldo(6),
537         regulator_desc_ldo(7),
538         regulator_desc_ldo(8),
539         regulator_desc_ldo(9),
540         regulator_desc_ldo(10),
541         regulator_desc_ldo(11),
542         regulator_desc_ldo(12),
543         regulator_desc_ldo(13),
544         regulator_desc_ldo(14),
545         regulator_desc_ldo(15),
546         regulator_desc_ldo(16),
547         regulator_desc_ldo(17),
548         regulator_desc_ldo(18),
549         regulator_desc_ldo(19),
550         regulator_desc_ldo(20),
551         regulator_desc_ldo(21),
552         regulator_desc_ldo(22),
553         regulator_desc_ldo(23),
554         regulator_desc_ldo(24),
555         regulator_desc_ldo(25),
556         regulator_desc_ldo(26),
557         regulator_desc_ldo(27),
558         regulator_desc_ldo(28),
559         regulator_desc_buck(1),
560         regulator_desc_buck(2),
561         regulator_desc_buck(3),
562         regulator_desc_buck(4),
563         regulator_desc_buck(5),
564         regulator_desc_buck(6),
565         regulator_desc_buck(7),
566         regulator_desc_buck(8),
567         regulator_desc_buck(9),
568 };
569
570 static __devinit int s5m8767_pmic_probe(struct platform_device *pdev)
571 {
572         struct s5m87xx_dev *iodev = dev_get_drvdata(pdev->dev.parent);
573         struct s5m_platform_data *pdata = dev_get_platdata(iodev->dev);
574         struct regulator_dev **rdev;
575         struct s5m8767_info *s5m8767;
576         struct i2c_client *i2c;
577         int i, ret, size, reg;
578
579         if (!pdata) {
580                 dev_err(pdev->dev.parent, "Platform data not supplied\n");
581                 return -ENODEV;
582         }
583
584         s5m8767 = devm_kzalloc(&pdev->dev, sizeof(struct s5m8767_info),
585                                 GFP_KERNEL);
586         if (!s5m8767)
587                 return -ENOMEM;
588
589         size = sizeof(struct regulator_dev *) * (S5M8767_REG_MAX - 2);
590         s5m8767->rdev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
591         if (!s5m8767->rdev)
592                 return -ENOMEM;
593
594         rdev = s5m8767->rdev;
595         s5m8767->dev = &pdev->dev;
596         s5m8767->iodev = iodev;
597         s5m8767->num_regulators = S5M8767_REG_MAX - 2;
598         platform_set_drvdata(pdev, s5m8767);
599         i2c = s5m8767->iodev->i2c;
600
601         s5m8767->buck_gpioindex = pdata->buck_default_idx;
602         s5m8767->buck2_gpiodvs = pdata->buck2_gpiodvs;
603         s5m8767->buck3_gpiodvs = pdata->buck3_gpiodvs;
604         s5m8767->buck4_gpiodvs = pdata->buck4_gpiodvs;
605         s5m8767->buck_gpios[0] = pdata->buck_gpios[0];
606         s5m8767->buck_gpios[1] = pdata->buck_gpios[1];
607         s5m8767->buck_gpios[2] = pdata->buck_gpios[2];
608         s5m8767->ramp_delay = pdata->buck_ramp_delay;
609         s5m8767->buck2_ramp = pdata->buck2_ramp_enable;
610         s5m8767->buck3_ramp = pdata->buck3_ramp_enable;
611         s5m8767->buck4_ramp = pdata->buck4_ramp_enable;
612
613         for (i = 0; i < 8; i++) {
614                 if (s5m8767->buck2_gpiodvs) {
615                         s5m8767->buck2_vol[i] =
616                                 s5m8767_convert_voltage(
617                                                 &buck_voltage_val2,
618                                                 pdata->buck2_voltage[i],
619                                                 pdata->buck2_voltage[i] +
620                                                 buck_voltage_val2.step);
621                 }
622
623                 if (s5m8767->buck3_gpiodvs) {
624                         s5m8767->buck3_vol[i] =
625                                 s5m8767_convert_voltage(
626                                                 &buck_voltage_val2,
627                                                 pdata->buck3_voltage[i],
628                                                 pdata->buck3_voltage[i] +
629                                                 buck_voltage_val2.step);
630                 }
631
632                 if (s5m8767->buck4_gpiodvs) {
633                         s5m8767->buck4_vol[i] =
634                                 s5m8767_convert_voltage(
635                                                 &buck_voltage_val2,
636                                                 pdata->buck4_voltage[i],
637                                                 pdata->buck4_voltage[i] +
638                                                 buck_voltage_val2.step);
639                 }
640         }
641
642         if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
643                 pdata->buck4_gpiodvs) {
644                 if (gpio_is_valid(pdata->buck_gpios[0]) &&
645                         gpio_is_valid(pdata->buck_gpios[1]) &&
646                         gpio_is_valid(pdata->buck_gpios[2])) {
647                         ret = gpio_request(pdata->buck_gpios[0],
648                                                 "S5M8767 SET1");
649                         if (ret == -EBUSY)
650                                 dev_warn(&pdev->dev, "Duplicated gpio request for SET1\n");
651
652                         ret = gpio_request(pdata->buck_gpios[1],
653                                            "S5M8767 SET2");
654                         if (ret == -EBUSY)
655                                 dev_warn(&pdev->dev, "Duplicated gpio request for SET2\n");
656
657                         ret = gpio_request(pdata->buck_gpios[2],
658                                            "S5M8767 SET3");
659                         if (ret == -EBUSY)
660                                 dev_warn(&pdev->dev, "Duplicated gpio request for SET3\n");
661                         /* SET1 GPIO */
662                         gpio_direction_output(pdata->buck_gpios[0],
663                                         (s5m8767->buck_gpioindex >> 2) & 0x1);
664                         /* SET2 GPIO */
665                         gpio_direction_output(pdata->buck_gpios[1],
666                                         (s5m8767->buck_gpioindex >> 1) & 0x1);
667                         /* SET3 GPIO */
668                         gpio_direction_output(pdata->buck_gpios[2],
669                                         (s5m8767->buck_gpioindex >> 0) & 0x1);
670                         ret = 0;
671                 } else {
672                         dev_err(&pdev->dev, "GPIO NOT VALID\n");
673                         ret = -EINVAL;
674                         return ret;
675                 }
676         }
677
678         if (pdata->buck2_gpiodvs) {
679                 if (pdata->buck3_gpiodvs || pdata->buck4_gpiodvs) {
680                         dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
681                         ret = -EINVAL;
682                         return ret;
683                 }
684         }
685
686         if (pdata->buck3_gpiodvs) {
687                 if (pdata->buck2_gpiodvs || pdata->buck4_gpiodvs) {
688                         dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
689                         ret = -EINVAL;
690                         return ret;
691                 }
692         }
693
694         if (pdata->buck4_gpiodvs) {
695                 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs) {
696                         dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
697                         ret = -EINVAL;
698                         return ret;
699                 }
700         }
701
702         s5m_reg_update(s5m8767->iodev, S5M8767_REG_BUCK2CTRL,
703                         (pdata->buck2_gpiodvs) ? (1 << 1) : (0 << 1), 1 << 1);
704         s5m_reg_update(s5m8767->iodev, S5M8767_REG_BUCK3CTRL,
705                         (pdata->buck3_gpiodvs) ? (1 << 1) : (0 << 1), 1 << 1);
706         s5m_reg_update(s5m8767->iodev, S5M8767_REG_BUCK4CTRL,
707                         (pdata->buck4_gpiodvs) ? (1 << 1) : (0 << 1), 1 << 1);
708
709         /* Initialize GPIO DVS registers */
710         for (i = 0; i < 8; i++) {
711                 if (s5m8767->buck2_gpiodvs) {
712                         s5m_reg_write(s5m8767->iodev, S5M8767_REG_BUCK2DVS1 + i,
713                                            s5m8767->buck2_vol[i]);
714                 }
715
716                 if (s5m8767->buck3_gpiodvs) {
717                         s5m_reg_write(s5m8767->iodev, S5M8767_REG_BUCK3DVS1 + i,
718                                            s5m8767->buck3_vol[i]);
719                 }
720
721                 if (s5m8767->buck4_gpiodvs) {
722                         s5m_reg_write(s5m8767->iodev, S5M8767_REG_BUCK4DVS1 + i,
723                                            s5m8767->buck4_vol[i]);
724                 }
725         }
726         s5m_reg_update(s5m8767->iodev, S5M8767_REG_BUCK2CTRL, 0x78, 0xff);
727         s5m_reg_update(s5m8767->iodev, S5M8767_REG_BUCK3CTRL, 0x58, 0xff);
728         s5m_reg_update(s5m8767->iodev, S5M8767_REG_BUCK4CTRL, 0x78, 0xff);
729
730         if (s5m8767->buck2_ramp)
731                 s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP, 0x08, 0x08);
732
733         if (s5m8767->buck3_ramp)
734                 s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP, 0x04, 0x04);
735
736         if (s5m8767->buck4_ramp)
737                 s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP, 0x02, 0x02);
738
739         if (s5m8767->buck2_ramp || s5m8767->buck3_ramp
740                 || s5m8767->buck4_ramp) {
741                 switch (s5m8767->ramp_delay) {
742                 case 15:
743                         s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
744                                         0xc0, 0xf0);
745                         break;
746                 case 25:
747                         s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
748                                         0xd0, 0xf0);
749                         break;
750                 case 50:
751                         s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
752                                         0xe0, 0xf0);
753                         break;
754                 case 100:
755                         s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
756                                         0xf0, 0xf0);
757                         break;
758                 default:
759                         s5m_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
760                                         0x90, 0xf0);
761                 }
762         }
763
764         for (i = 0; i < pdata->num_regulators; i++) {
765                 const struct s5m_voltage_desc *desc;
766                 int id = pdata->regulators[i].id;
767
768                 desc = reg_voltage_map[id];
769                 if (desc)
770                         regulators[id].n_voltages =
771                                 (desc->max - desc->min) / desc->step + 1;
772
773                 rdev[i] = regulator_register(&regulators[id], s5m8767->dev,
774                                 pdata->regulators[i].initdata, s5m8767);
775                 if (IS_ERR(rdev[i])) {
776                         ret = PTR_ERR(rdev[i]);
777                         dev_err(s5m8767->dev, "regulator init failed for %d\n",
778                                         id);
779                         rdev[i] = NULL;
780                         goto err;
781                 }
782         }
783
784         return 0;
785 err:
786         for (i = 0; i < s5m8767->num_regulators; i++)
787                 if (rdev[i])
788                         regulator_unregister(rdev[i]);
789
790         return ret;
791 }
792
793 static int __devexit s5m8767_pmic_remove(struct platform_device *pdev)
794 {
795         struct s5m8767_info *s5m8767 = platform_get_drvdata(pdev);
796         struct regulator_dev **rdev = s5m8767->rdev;
797         int i;
798
799         for (i = 0; i < s5m8767->num_regulators; i++)
800                 if (rdev[i])
801                         regulator_unregister(rdev[i]);
802
803         return 0;
804 }
805
806 static const struct platform_device_id s5m8767_pmic_id[] = {
807         { "s5m8767-pmic", 0},
808         { },
809 };
810 MODULE_DEVICE_TABLE(platform, s5m8767_pmic_id);
811
812 static struct platform_driver s5m8767_pmic_driver = {
813         .driver = {
814                 .name = "s5m8767-pmic",
815                 .owner = THIS_MODULE,
816         },
817         .probe = s5m8767_pmic_probe,
818         .remove = __devexit_p(s5m8767_pmic_remove),
819         .id_table = s5m8767_pmic_id,
820 };
821
822 static int __init s5m8767_pmic_init(void)
823 {
824         return platform_driver_register(&s5m8767_pmic_driver);
825 }
826 subsys_initcall(s5m8767_pmic_init);
827
828 static void __exit s5m8767_pmic_exit(void)
829 {
830         platform_driver_unregister(&s5m8767_pmic_driver);
831 }
832 module_exit(s5m8767_pmic_exit);
833
834 /* Module information */
835 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
836 MODULE_DESCRIPTION("SAMSUNG S5M8767 Regulator Driver");
837 MODULE_LICENSE("GPL");
838 MODULE_ALIAS("platform:s5m8767-pmic");