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regulator: s5m8767: Fix to read the first DVS register.
[~shefty/rdma-dev.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/err.h>
16 #include <linux/gpio.h>
17 #include <linux/slab.h>
18 #include <linux/module.h>
19 #include <linux/platform_device.h>
20 #include <linux/regulator/driver.h>
21 #include <linux/regulator/machine.h>
22 #include <linux/mfd/samsung/core.h>
23 #include <linux/mfd/samsung/s5m8767.h>
24
25 struct s5m8767_info {
26         struct device *dev;
27         struct sec_pmic_dev *iodev;
28         int num_regulators;
29         struct regulator_dev **rdev;
30         struct sec_opmode_data *opmode;
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_ds[3];
45         int buck_gpioindex;
46 };
47
48 struct sec_voltage_desc {
49         int max;
50         int min;
51         int step;
52 };
53
54 static const struct sec_voltage_desc buck_voltage_val1 = {
55         .max = 2225000,
56         .min =  650000,
57         .step =   6250,
58 };
59
60 static const struct sec_voltage_desc buck_voltage_val2 = {
61         .max = 1600000,
62         .min =  600000,
63         .step =   6250,
64 };
65
66 static const struct sec_voltage_desc buck_voltage_val3 = {
67         .max = 3000000,
68         .min =  750000,
69         .step =  12500,
70 };
71
72 static const struct sec_voltage_desc ldo_voltage_val1 = {
73         .max = 3950000,
74         .min =  800000,
75         .step =  50000,
76 };
77
78 static const struct sec_voltage_desc ldo_voltage_val2 = {
79         .max = 2375000,
80         .min =  800000,
81         .step =  25000,
82 };
83
84 static const struct sec_voltage_desc *reg_voltage_map[] = {
85         [S5M8767_LDO1] = &ldo_voltage_val2,
86         [S5M8767_LDO2] = &ldo_voltage_val2,
87         [S5M8767_LDO3] = &ldo_voltage_val1,
88         [S5M8767_LDO4] = &ldo_voltage_val1,
89         [S5M8767_LDO5] = &ldo_voltage_val1,
90         [S5M8767_LDO6] = &ldo_voltage_val2,
91         [S5M8767_LDO7] = &ldo_voltage_val2,
92         [S5M8767_LDO8] = &ldo_voltage_val2,
93         [S5M8767_LDO9] = &ldo_voltage_val1,
94         [S5M8767_LDO10] = &ldo_voltage_val1,
95         [S5M8767_LDO11] = &ldo_voltage_val1,
96         [S5M8767_LDO12] = &ldo_voltage_val1,
97         [S5M8767_LDO13] = &ldo_voltage_val1,
98         [S5M8767_LDO14] = &ldo_voltage_val1,
99         [S5M8767_LDO15] = &ldo_voltage_val2,
100         [S5M8767_LDO16] = &ldo_voltage_val1,
101         [S5M8767_LDO17] = &ldo_voltage_val1,
102         [S5M8767_LDO18] = &ldo_voltage_val1,
103         [S5M8767_LDO19] = &ldo_voltage_val1,
104         [S5M8767_LDO20] = &ldo_voltage_val1,
105         [S5M8767_LDO21] = &ldo_voltage_val1,
106         [S5M8767_LDO22] = &ldo_voltage_val1,
107         [S5M8767_LDO23] = &ldo_voltage_val1,
108         [S5M8767_LDO24] = &ldo_voltage_val1,
109         [S5M8767_LDO25] = &ldo_voltage_val1,
110         [S5M8767_LDO26] = &ldo_voltage_val1,
111         [S5M8767_LDO27] = &ldo_voltage_val1,
112         [S5M8767_LDO28] = &ldo_voltage_val1,
113         [S5M8767_BUCK1] = &buck_voltage_val1,
114         [S5M8767_BUCK2] = &buck_voltage_val2,
115         [S5M8767_BUCK3] = &buck_voltage_val2,
116         [S5M8767_BUCK4] = &buck_voltage_val2,
117         [S5M8767_BUCK5] = &buck_voltage_val1,
118         [S5M8767_BUCK6] = &buck_voltage_val1,
119         [S5M8767_BUCK7] = NULL,
120         [S5M8767_BUCK8] = NULL,
121         [S5M8767_BUCK9] = &buck_voltage_val3,
122 };
123
124 static unsigned int s5m8767_opmode_reg[][4] = {
125         /* {OFF, ON, LOWPOWER, SUSPEND} */
126         /* LDO1 ... LDO28 */
127         {0x0, 0x3, 0x2, 0x1}, /* LDO1 */
128         {0x0, 0x3, 0x2, 0x1},
129         {0x0, 0x3, 0x2, 0x1},
130         {0x0, 0x0, 0x0, 0x0},
131         {0x0, 0x3, 0x2, 0x1}, /* LDO5 */
132         {0x0, 0x3, 0x2, 0x1},
133         {0x0, 0x3, 0x2, 0x1},
134         {0x0, 0x3, 0x2, 0x1},
135         {0x0, 0x3, 0x2, 0x1},
136         {0x0, 0x3, 0x2, 0x1}, /* LDO10 */
137         {0x0, 0x3, 0x2, 0x1},
138         {0x0, 0x3, 0x2, 0x1},
139         {0x0, 0x3, 0x2, 0x1},
140         {0x0, 0x3, 0x2, 0x1},
141         {0x0, 0x3, 0x2, 0x1}, /* LDO15 */
142         {0x0, 0x3, 0x2, 0x1},
143         {0x0, 0x3, 0x2, 0x1},
144         {0x0, 0x0, 0x0, 0x0},
145         {0x0, 0x3, 0x2, 0x1},
146         {0x0, 0x3, 0x2, 0x1}, /* LDO20 */
147         {0x0, 0x3, 0x2, 0x1},
148         {0x0, 0x3, 0x2, 0x1},
149         {0x0, 0x0, 0x0, 0x0},
150         {0x0, 0x3, 0x2, 0x1},
151         {0x0, 0x3, 0x2, 0x1}, /* LDO25 */
152         {0x0, 0x3, 0x2, 0x1},
153         {0x0, 0x3, 0x2, 0x1},
154         {0x0, 0x3, 0x2, 0x1}, /* LDO28 */
155
156         /* BUCK1 ... BUCK9 */
157         {0x0, 0x3, 0x1, 0x1}, /* BUCK1 */
158         {0x0, 0x3, 0x1, 0x1},
159         {0x0, 0x3, 0x1, 0x1},
160         {0x0, 0x3, 0x1, 0x1},
161         {0x0, 0x3, 0x2, 0x1}, /* BUCK5 */
162         {0x0, 0x3, 0x1, 0x1},
163         {0x0, 0x3, 0x1, 0x1},
164         {0x0, 0x3, 0x1, 0x1},
165         {0x0, 0x3, 0x1, 0x1}, /* BUCK9 */
166 };
167
168 static int s5m8767_get_register(struct regulator_dev *rdev, int *reg,
169                                 int *enable_ctrl)
170 {
171         int i, reg_id = rdev_get_id(rdev);
172         unsigned int mode;
173         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
174
175         switch (reg_id) {
176         case S5M8767_LDO1 ... S5M8767_LDO2:
177                 *reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1);
178                 break;
179         case S5M8767_LDO3 ... S5M8767_LDO28:
180                 *reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3);
181                 break;
182         case S5M8767_BUCK1:
183                 *reg = S5M8767_REG_BUCK1CTRL1;
184                 break;
185         case S5M8767_BUCK2 ... S5M8767_BUCK4:
186                 *reg = S5M8767_REG_BUCK2CTRL + (reg_id - S5M8767_BUCK2) * 9;
187                 break;
188         case S5M8767_BUCK5:
189                 *reg = S5M8767_REG_BUCK5CTRL1;
190                 break;
191         case S5M8767_BUCK6 ... S5M8767_BUCK9:
192                 *reg = S5M8767_REG_BUCK6CTRL1 + (reg_id - S5M8767_BUCK6) * 2;
193                 break;
194         default:
195                 return -EINVAL;
196         }
197
198         for (i = 0; i < s5m8767->num_regulators; i++) {
199                 if (s5m8767->opmode[i].id == reg_id) {
200                         mode = s5m8767->opmode[i].mode;
201                         break;
202                 }
203         }
204
205         if (i < s5m8767->num_regulators)
206                 *enable_ctrl =
207                 s5m8767_opmode_reg[reg_id][mode] << S5M8767_ENCTRL_SHIFT;
208
209         return 0;
210 }
211
212 static int s5m8767_reg_is_enabled(struct regulator_dev *rdev)
213 {
214         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
215         int ret, reg;
216         int mask = 0xc0, enable_ctrl;
217         u8 val;
218
219         ret = s5m8767_get_register(rdev, &reg, &enable_ctrl);
220         if (ret == -EINVAL)
221                 return 1;
222         else if (ret)
223                 return ret;
224
225         ret = sec_reg_read(s5m8767->iodev, reg, &val);
226         if (ret)
227                 return ret;
228
229         return (val & mask) == enable_ctrl;
230 }
231
232 static int s5m8767_reg_enable(struct regulator_dev *rdev)
233 {
234         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
235         int ret, reg;
236         int mask = 0xc0, enable_ctrl;
237
238         ret = s5m8767_get_register(rdev, &reg, &enable_ctrl);
239         if (ret)
240                 return ret;
241
242         return sec_reg_update(s5m8767->iodev, reg, enable_ctrl, mask);
243 }
244
245 static int s5m8767_reg_disable(struct regulator_dev *rdev)
246 {
247         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
248         int ret, reg;
249         int  mask = 0xc0, enable_ctrl;
250
251         ret = s5m8767_get_register(rdev, &reg, &enable_ctrl);
252         if (ret)
253                 return ret;
254
255         return sec_reg_update(s5m8767->iodev, reg, ~mask, mask);
256 }
257
258 static int s5m8767_get_voltage_register(struct regulator_dev *rdev, int *_reg)
259 {
260         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
261         int reg_id = rdev_get_id(rdev);
262         int reg;
263
264         switch (reg_id) {
265         case S5M8767_LDO1 ... S5M8767_LDO2:
266                 reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1);
267                 break;
268         case S5M8767_LDO3 ... S5M8767_LDO28:
269                 reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3);
270                 break;
271         case S5M8767_BUCK1:
272                 reg = S5M8767_REG_BUCK1CTRL2;
273                 break;
274         case S5M8767_BUCK2:
275                 reg = S5M8767_REG_BUCK2DVS1;
276                 if (s5m8767->buck2_gpiodvs)
277                         reg += s5m8767->buck_gpioindex;
278                 break;
279         case S5M8767_BUCK3:
280                 reg = S5M8767_REG_BUCK3DVS1;
281                 if (s5m8767->buck3_gpiodvs)
282                         reg += s5m8767->buck_gpioindex;
283                 break;
284         case S5M8767_BUCK4:
285                 reg = S5M8767_REG_BUCK4DVS1;
286                 if (s5m8767->buck4_gpiodvs)
287                         reg += s5m8767->buck_gpioindex;
288                 break;
289         case S5M8767_BUCK5:
290                 reg = S5M8767_REG_BUCK5CTRL2;
291                 break;
292         case S5M8767_BUCK6 ... S5M8767_BUCK9:
293                 reg = S5M8767_REG_BUCK6CTRL2 + (reg_id - S5M8767_BUCK6) * 2;
294                 break;
295         default:
296                 return -EINVAL;
297         }
298
299         *_reg = reg;
300
301         return 0;
302 }
303
304 static int s5m8767_get_voltage_sel(struct regulator_dev *rdev)
305 {
306         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
307         int reg, mask, ret;
308         int reg_id = rdev_get_id(rdev);
309         u8 val;
310
311         ret = s5m8767_get_voltage_register(rdev, &reg);
312         if (ret)
313                 return ret;
314
315         mask = (reg_id < S5M8767_BUCK1) ? 0x3f : 0xff;
316
317         ret = sec_reg_read(s5m8767->iodev, reg, &val);
318         if (ret)
319                 return ret;
320
321         val &= mask;
322
323         return val;
324 }
325
326 static int s5m8767_convert_voltage_to_sel(
327                 const struct sec_voltage_desc *desc,
328                 int min_vol, int max_vol)
329 {
330         int selector = 0;
331
332         if (desc == NULL)
333                 return -EINVAL;
334
335         if (max_vol < desc->min || min_vol > desc->max)
336                 return -EINVAL;
337
338         if (min_vol < desc->min)
339                 min_vol = desc->min;
340
341         selector = DIV_ROUND_UP(min_vol - desc->min, desc->step);
342
343         if (desc->min + desc->step * selector > max_vol)
344                 return -EINVAL;
345
346         return selector;
347 }
348
349 static inline int s5m8767_set_high(struct s5m8767_info *s5m8767)
350 {
351         int temp_index = s5m8767->buck_gpioindex;
352
353         gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
354         gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
355         gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
356
357         return 0;
358 }
359
360 static inline int s5m8767_set_low(struct s5m8767_info *s5m8767)
361 {
362         int temp_index = s5m8767->buck_gpioindex;
363
364         gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
365         gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
366         gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
367
368         return 0;
369 }
370
371 static int s5m8767_set_voltage_sel(struct regulator_dev *rdev,
372                                    unsigned selector)
373 {
374         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
375         int reg_id = rdev_get_id(rdev);
376         int reg, mask, ret = 0, old_index, index = 0;
377         u8 *buck234_vol = NULL;
378
379         switch (reg_id) {
380         case S5M8767_LDO1 ... S5M8767_LDO28:
381                 mask = 0x3f;
382                 break;
383         case S5M8767_BUCK1 ... S5M8767_BUCK6:
384                 mask = 0xff;
385                 if (reg_id == S5M8767_BUCK2 && s5m8767->buck2_gpiodvs)
386                         buck234_vol = &s5m8767->buck2_vol[0];
387                 else if (reg_id == S5M8767_BUCK3 && s5m8767->buck3_gpiodvs)
388                         buck234_vol = &s5m8767->buck3_vol[0];
389                 else if (reg_id == S5M8767_BUCK4 && s5m8767->buck4_gpiodvs)
390                         buck234_vol = &s5m8767->buck4_vol[0];
391                 break;
392         case S5M8767_BUCK7 ... S5M8767_BUCK8:
393                 return -EINVAL;
394         case S5M8767_BUCK9:
395                 mask = 0xff;
396                 break;
397         default:
398                 return -EINVAL;
399         }
400
401         /* buck234_vol != NULL means to control buck234 voltage via DVS GPIO */
402         if (buck234_vol) {
403                 while (*buck234_vol != selector) {
404                         buck234_vol++;
405                         index++;
406                 }
407                 old_index = s5m8767->buck_gpioindex;
408                 s5m8767->buck_gpioindex = index;
409
410                 if (index > old_index)
411                         return s5m8767_set_high(s5m8767);
412                 else
413                         return s5m8767_set_low(s5m8767);
414         } else {
415                 ret = s5m8767_get_voltage_register(rdev, &reg);
416                 if (ret)
417                         return ret;
418
419                 return sec_reg_update(s5m8767->iodev, reg, selector, mask);
420         }
421 }
422
423 static int s5m8767_set_voltage_time_sel(struct regulator_dev *rdev,
424                                              unsigned int old_sel,
425                                              unsigned int new_sel)
426 {
427         struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
428         const struct sec_voltage_desc *desc;
429         int reg_id = rdev_get_id(rdev);
430
431         desc = reg_voltage_map[reg_id];
432
433         if ((old_sel < new_sel) && s5m8767->ramp_delay)
434                 return DIV_ROUND_UP(desc->step * (new_sel - old_sel),
435                                         s5m8767->ramp_delay * 1000);
436         return 0;
437 }
438
439 static struct regulator_ops s5m8767_ops = {
440         .list_voltage           = regulator_list_voltage_linear,
441         .is_enabled             = s5m8767_reg_is_enabled,
442         .enable                 = s5m8767_reg_enable,
443         .disable                = s5m8767_reg_disable,
444         .get_voltage_sel        = s5m8767_get_voltage_sel,
445         .set_voltage_sel        = s5m8767_set_voltage_sel,
446         .set_voltage_time_sel   = s5m8767_set_voltage_time_sel,
447 };
448
449 static struct regulator_ops s5m8767_buck78_ops = {
450         .is_enabled             = s5m8767_reg_is_enabled,
451         .enable                 = s5m8767_reg_enable,
452         .disable                = s5m8767_reg_disable,
453 };
454
455 #define s5m8767_regulator_desc(_name) {         \
456         .name           = #_name,               \
457         .id             = S5M8767_##_name,      \
458         .ops            = &s5m8767_ops,         \
459         .type           = REGULATOR_VOLTAGE,    \
460         .owner          = THIS_MODULE,          \
461 }
462
463 #define s5m8767_regulator_buck78_desc(_name) {  \
464         .name           = #_name,               \
465         .id             = S5M8767_##_name,      \
466         .ops            = &s5m8767_buck78_ops,  \
467         .type           = REGULATOR_VOLTAGE,    \
468         .owner          = THIS_MODULE,          \
469 }
470
471 static struct regulator_desc regulators[] = {
472         s5m8767_regulator_desc(LDO1),
473         s5m8767_regulator_desc(LDO2),
474         s5m8767_regulator_desc(LDO3),
475         s5m8767_regulator_desc(LDO4),
476         s5m8767_regulator_desc(LDO5),
477         s5m8767_regulator_desc(LDO6),
478         s5m8767_regulator_desc(LDO7),
479         s5m8767_regulator_desc(LDO8),
480         s5m8767_regulator_desc(LDO9),
481         s5m8767_regulator_desc(LDO10),
482         s5m8767_regulator_desc(LDO11),
483         s5m8767_regulator_desc(LDO12),
484         s5m8767_regulator_desc(LDO13),
485         s5m8767_regulator_desc(LDO14),
486         s5m8767_regulator_desc(LDO15),
487         s5m8767_regulator_desc(LDO16),
488         s5m8767_regulator_desc(LDO17),
489         s5m8767_regulator_desc(LDO18),
490         s5m8767_regulator_desc(LDO19),
491         s5m8767_regulator_desc(LDO20),
492         s5m8767_regulator_desc(LDO21),
493         s5m8767_regulator_desc(LDO22),
494         s5m8767_regulator_desc(LDO23),
495         s5m8767_regulator_desc(LDO24),
496         s5m8767_regulator_desc(LDO25),
497         s5m8767_regulator_desc(LDO26),
498         s5m8767_regulator_desc(LDO27),
499         s5m8767_regulator_desc(LDO28),
500         s5m8767_regulator_desc(BUCK1),
501         s5m8767_regulator_desc(BUCK2),
502         s5m8767_regulator_desc(BUCK3),
503         s5m8767_regulator_desc(BUCK4),
504         s5m8767_regulator_desc(BUCK5),
505         s5m8767_regulator_desc(BUCK6),
506         s5m8767_regulator_buck78_desc(BUCK7),
507         s5m8767_regulator_buck78_desc(BUCK8),
508         s5m8767_regulator_desc(BUCK9),
509 };
510
511 static __devinit int s5m8767_pmic_probe(struct platform_device *pdev)
512 {
513         struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
514         struct sec_platform_data *pdata = dev_get_platdata(iodev->dev);
515         struct regulator_config config = { };
516         struct regulator_dev **rdev;
517         struct s5m8767_info *s5m8767;
518         int i, ret, size, buck_init;
519
520         if (!pdata) {
521                 dev_err(pdev->dev.parent, "Platform data not supplied\n");
522                 return -ENODEV;
523         }
524
525         if (pdata->buck2_gpiodvs) {
526                 if (pdata->buck3_gpiodvs || pdata->buck4_gpiodvs) {
527                         dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
528                         return -EINVAL;
529                 }
530         }
531
532         if (pdata->buck3_gpiodvs) {
533                 if (pdata->buck2_gpiodvs || pdata->buck4_gpiodvs) {
534                         dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
535                         return -EINVAL;
536                 }
537         }
538
539         if (pdata->buck4_gpiodvs) {
540                 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs) {
541                         dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
542                         return -EINVAL;
543                 }
544         }
545
546         s5m8767 = devm_kzalloc(&pdev->dev, sizeof(struct s5m8767_info),
547                                 GFP_KERNEL);
548         if (!s5m8767)
549                 return -ENOMEM;
550
551         size = sizeof(struct regulator_dev *) * (S5M8767_REG_MAX - 2);
552         s5m8767->rdev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
553         if (!s5m8767->rdev)
554                 return -ENOMEM;
555
556         rdev = s5m8767->rdev;
557         s5m8767->dev = &pdev->dev;
558         s5m8767->iodev = iodev;
559         s5m8767->num_regulators = pdata->num_regulators;
560         platform_set_drvdata(pdev, s5m8767);
561
562         s5m8767->buck_gpioindex = pdata->buck_default_idx;
563         s5m8767->buck2_gpiodvs = pdata->buck2_gpiodvs;
564         s5m8767->buck3_gpiodvs = pdata->buck3_gpiodvs;
565         s5m8767->buck4_gpiodvs = pdata->buck4_gpiodvs;
566         s5m8767->buck_gpios[0] = pdata->buck_gpios[0];
567         s5m8767->buck_gpios[1] = pdata->buck_gpios[1];
568         s5m8767->buck_gpios[2] = pdata->buck_gpios[2];
569         s5m8767->buck_ds[0] = pdata->buck_ds[0];
570         s5m8767->buck_ds[1] = pdata->buck_ds[1];
571         s5m8767->buck_ds[2] = pdata->buck_ds[2];
572
573         s5m8767->ramp_delay = pdata->buck_ramp_delay;
574         s5m8767->buck2_ramp = pdata->buck2_ramp_enable;
575         s5m8767->buck3_ramp = pdata->buck3_ramp_enable;
576         s5m8767->buck4_ramp = pdata->buck4_ramp_enable;
577         s5m8767->opmode = pdata->opmode;
578
579         buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
580                                                 pdata->buck2_init,
581                                                 pdata->buck2_init +
582                                                 buck_voltage_val2.step);
583
584         sec_reg_write(s5m8767->iodev, S5M8767_REG_BUCK2DVS2, buck_init);
585
586         buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
587                                                 pdata->buck3_init,
588                                                 pdata->buck3_init +
589                                                 buck_voltage_val2.step);
590
591         sec_reg_write(s5m8767->iodev, S5M8767_REG_BUCK3DVS2, buck_init);
592
593         buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
594                                                 pdata->buck4_init,
595                                                 pdata->buck4_init +
596                                                 buck_voltage_val2.step);
597
598         sec_reg_write(s5m8767->iodev, S5M8767_REG_BUCK4DVS2, buck_init);
599
600         for (i = 0; i < 8; i++) {
601                 if (s5m8767->buck2_gpiodvs) {
602                         s5m8767->buck2_vol[i] =
603                                 s5m8767_convert_voltage_to_sel(
604                                                 &buck_voltage_val2,
605                                                 pdata->buck2_voltage[i],
606                                                 pdata->buck2_voltage[i] +
607                                                 buck_voltage_val2.step);
608                 }
609
610                 if (s5m8767->buck3_gpiodvs) {
611                         s5m8767->buck3_vol[i] =
612                                 s5m8767_convert_voltage_to_sel(
613                                                 &buck_voltage_val2,
614                                                 pdata->buck3_voltage[i],
615                                                 pdata->buck3_voltage[i] +
616                                                 buck_voltage_val2.step);
617                 }
618
619                 if (s5m8767->buck4_gpiodvs) {
620                         s5m8767->buck4_vol[i] =
621                                 s5m8767_convert_voltage_to_sel(
622                                                 &buck_voltage_val2,
623                                                 pdata->buck4_voltage[i],
624                                                 pdata->buck4_voltage[i] +
625                                                 buck_voltage_val2.step);
626                 }
627         }
628
629         if (gpio_is_valid(pdata->buck_gpios[0]) &&
630                 gpio_is_valid(pdata->buck_gpios[1]) &&
631                 gpio_is_valid(pdata->buck_gpios[2])) {
632                 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[0],
633                                         "S5M8767 SET1");
634                 if (ret)
635                         return ret;
636
637                 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[1],
638                                         "S5M8767 SET2");
639                 if (ret)
640                         return ret;
641
642                 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[2],
643                                         "S5M8767 SET3");
644                 if (ret)
645                         return ret;
646
647                 /* SET1 GPIO */
648                 gpio_direction_output(pdata->buck_gpios[0],
649                                 (s5m8767->buck_gpioindex >> 2) & 0x1);
650                 /* SET2 GPIO */
651                 gpio_direction_output(pdata->buck_gpios[1],
652                                 (s5m8767->buck_gpioindex >> 1) & 0x1);
653                 /* SET3 GPIO */
654                 gpio_direction_output(pdata->buck_gpios[2],
655                                 (s5m8767->buck_gpioindex >> 0) & 0x1);
656         } else {
657                 dev_err(&pdev->dev, "GPIO NOT VALID\n");
658                 ret = -EINVAL;
659                 return ret;
660         }
661
662         ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[0], "S5M8767 DS2");
663         if (ret)
664                 return ret;
665
666         ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[1], "S5M8767 DS3");
667         if (ret)
668                 return ret;
669
670         ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[2], "S5M8767 DS4");
671         if (ret)
672                 return ret;
673
674         /* DS2 GPIO */
675         gpio_direction_output(pdata->buck_ds[0], 0x0);
676         /* DS3 GPIO */
677         gpio_direction_output(pdata->buck_ds[1], 0x0);
678         /* DS4 GPIO */
679         gpio_direction_output(pdata->buck_ds[2], 0x0);
680
681         if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
682            pdata->buck4_gpiodvs) {
683                 sec_reg_update(s5m8767->iodev, S5M8767_REG_BUCK2CTRL,
684                                 (pdata->buck2_gpiodvs) ? (1 << 1) : (0 << 1),
685                                 1 << 1);
686                 sec_reg_update(s5m8767->iodev, S5M8767_REG_BUCK3CTRL,
687                                 (pdata->buck3_gpiodvs) ? (1 << 1) : (0 << 1),
688                                 1 << 1);
689                 sec_reg_update(s5m8767->iodev, S5M8767_REG_BUCK4CTRL,
690                                 (pdata->buck4_gpiodvs) ? (1 << 1) : (0 << 1),
691                                 1 << 1);
692         }
693
694         /* Initialize GPIO DVS registers */
695         for (i = 0; i < 8; i++) {
696                 if (s5m8767->buck2_gpiodvs) {
697                         sec_reg_write(s5m8767->iodev, S5M8767_REG_BUCK2DVS1 + i,
698                                            s5m8767->buck2_vol[i]);
699                 }
700
701                 if (s5m8767->buck3_gpiodvs) {
702                         sec_reg_write(s5m8767->iodev, S5M8767_REG_BUCK3DVS1 + i,
703                                            s5m8767->buck3_vol[i]);
704                 }
705
706                 if (s5m8767->buck4_gpiodvs) {
707                         sec_reg_write(s5m8767->iodev, S5M8767_REG_BUCK4DVS1 + i,
708                                            s5m8767->buck4_vol[i]);
709                 }
710         }
711
712         if (s5m8767->buck2_ramp)
713                 sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP, 0x08, 0x08);
714
715         if (s5m8767->buck3_ramp)
716                 sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP, 0x04, 0x04);
717
718         if (s5m8767->buck4_ramp)
719                 sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP, 0x02, 0x02);
720
721         if (s5m8767->buck2_ramp || s5m8767->buck3_ramp
722                 || s5m8767->buck4_ramp) {
723                 switch (s5m8767->ramp_delay) {
724                 case 5:
725                         sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
726                                         0x40, 0xf0);
727                         break;
728                 case 10:
729                         sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
730                                         0x90, 0xf0);
731                         break;
732                 case 25:
733                         sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
734                                         0xd0, 0xf0);
735                         break;
736                 case 50:
737                         sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
738                                         0xe0, 0xf0);
739                         break;
740                 case 100:
741                         sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
742                                         0xf0, 0xf0);
743                         break;
744                 default:
745                         sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
746                                         0x90, 0xf0);
747                 }
748         }
749
750         for (i = 0; i < pdata->num_regulators; i++) {
751                 const struct sec_voltage_desc *desc;
752                 int id = pdata->regulators[i].id;
753
754                 desc = reg_voltage_map[id];
755                 if (desc) {
756                         regulators[id].n_voltages =
757                                 (desc->max - desc->min) / desc->step + 1;
758                         regulators[id].min_uV = desc->min;
759                         regulators[id].uV_step = desc->step;
760                 }
761
762                 config.dev = s5m8767->dev;
763                 config.init_data = pdata->regulators[i].initdata;
764                 config.driver_data = s5m8767;
765
766                 rdev[i] = regulator_register(&regulators[id], &config);
767                 if (IS_ERR(rdev[i])) {
768                         ret = PTR_ERR(rdev[i]);
769                         dev_err(s5m8767->dev, "regulator init failed for %d\n",
770                                         id);
771                         rdev[i] = NULL;
772                         goto err;
773                 }
774         }
775
776         return 0;
777 err:
778         for (i = 0; i < s5m8767->num_regulators; i++)
779                 if (rdev[i])
780                         regulator_unregister(rdev[i]);
781
782         return ret;
783 }
784
785 static int __devexit s5m8767_pmic_remove(struct platform_device *pdev)
786 {
787         struct s5m8767_info *s5m8767 = platform_get_drvdata(pdev);
788         struct regulator_dev **rdev = s5m8767->rdev;
789         int i;
790
791         for (i = 0; i < s5m8767->num_regulators; i++)
792                 if (rdev[i])
793                         regulator_unregister(rdev[i]);
794
795         return 0;
796 }
797
798 static const struct platform_device_id s5m8767_pmic_id[] = {
799         { "s5m8767-pmic", 0},
800         { },
801 };
802 MODULE_DEVICE_TABLE(platform, s5m8767_pmic_id);
803
804 static struct platform_driver s5m8767_pmic_driver = {
805         .driver = {
806                 .name = "s5m8767-pmic",
807                 .owner = THIS_MODULE,
808         },
809         .probe = s5m8767_pmic_probe,
810         .remove = __devexit_p(s5m8767_pmic_remove),
811         .id_table = s5m8767_pmic_id,
812 };
813
814 static int __init s5m8767_pmic_init(void)
815 {
816         return platform_driver_register(&s5m8767_pmic_driver);
817 }
818 subsys_initcall(s5m8767_pmic_init);
819
820 static void __exit s5m8767_pmic_exit(void)
821 {
822         platform_driver_unregister(&s5m8767_pmic_driver);
823 }
824 module_exit(s5m8767_pmic_exit);
825
826 /* Module information */
827 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
828 MODULE_DESCRIPTION("SAMSUNG S5M8767 Regulator Driver");
829 MODULE_LICENSE("GPL");