regulator: support da9030 BUCK in da903x driver
[linux-2.6.git] / drivers / regulator / da903x.c
1 /*
2  * Regulators driver for Dialog Semiconductor DA903x
3  *
4  * Copyright (C) 2006-2008 Marvell International Ltd.
5  * Copyright (C) 2008 Compulab Ltd.
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License version 2 as
9  * published by the Free Software Foundation.
10  */
11
12 #include <linux/kernel.h>
13 #include <linux/init.h>
14 #include <linux/err.h>
15 #include <linux/platform_device.h>
16 #include <linux/regulator/driver.h>
17 #include <linux/regulator/machine.h>
18 #include <linux/mfd/da903x.h>
19
20 /* DA9030 Registers */
21 #define DA9030_INVAL            (-1)
22 #define DA9030_LDO1011          (0x10)
23 #define DA9030_LDO15            (0x11)
24 #define DA9030_LDO1416          (0x12)
25 #define DA9030_LDO1819          (0x13)
26 #define DA9030_LDO17            (0x14)
27 #define DA9030_BUCK2DVM1        (0x15)
28 #define DA9030_BUCK2DVM2        (0x16)
29 #define DA9030_RCTL11           (0x17)
30 #define DA9030_RCTL21           (0x18)
31 #define DA9030_LDO1             (0x90)
32 #define DA9030_LDO23            (0x91)
33 #define DA9030_LDO45            (0x92)
34 #define DA9030_LDO6             (0x93)
35 #define DA9030_LDO78            (0x94)
36 #define DA9030_LDO912           (0x95)
37 #define DA9030_BUCK             (0x96)
38 #define DA9030_RCTL12           (0x97)
39 #define DA9030_RCTL22           (0x98)
40 #define DA9030_LDO_UNLOCK       (0xa0)
41 #define DA9030_LDO_UNLOCK_MASK  (0xe0)
42 #define DA9034_OVER1            (0x10)
43
44 /* DA9034 Registers */
45 #define DA9034_INVAL            (-1)
46 #define DA9034_OVER2            (0x11)
47 #define DA9034_OVER3            (0x12)
48 #define DA9034_LDO643           (0x13)
49 #define DA9034_LDO987           (0x14)
50 #define DA9034_LDO1110          (0x15)
51 #define DA9034_LDO1312          (0x16)
52 #define DA9034_LDO1514          (0x17)
53 #define DA9034_VCC1             (0x20)
54 #define DA9034_ADTV1            (0x23)
55 #define DA9034_ADTV2            (0x24)
56 #define DA9034_AVRC             (0x25)
57 #define DA9034_CDTV1            (0x26)
58 #define DA9034_CDTV2            (0x27)
59 #define DA9034_CVRC             (0x28)
60 #define DA9034_SDTV1            (0x29)
61 #define DA9034_SDTV2            (0x2a)
62 #define DA9034_SVRC             (0x2b)
63 #define DA9034_MDTV1            (0x32)
64 #define DA9034_MDTV2            (0x33)
65 #define DA9034_MVRC             (0x34)
66
67 /* DA9035 Registers. DA9034 Registers are comptabile to DA9035. */
68 #define DA9035_OVER3            (0x12)
69 #define DA9035_VCC2             (0x1f)
70 #define DA9035_3DTV1            (0x2c)
71 #define DA9035_3DTV2            (0x2d)
72 #define DA9035_3VRC             (0x2e)
73 #define DA9035_AUTOSKIP         (0x2f)
74
75 struct da903x_regulator_info {
76         struct regulator_desc desc;
77
78         int     min_uV;
79         int     max_uV;
80         int     step_uV;
81         int     vol_reg;
82         int     vol_shift;
83         int     vol_nbits;
84         int     update_reg;
85         int     update_bit;
86         int     enable_reg;
87         int     enable_bit;
88 };
89
90 static inline struct device *to_da903x_dev(struct regulator_dev *rdev)
91 {
92         return rdev_get_dev(rdev)->parent->parent;
93 }
94
95 static inline int check_range(struct da903x_regulator_info *info,
96                                 int min_uV, int max_uV)
97 {
98         if (min_uV < info->min_uV || min_uV > info->max_uV)
99                 return -EINVAL;
100
101         return 0;
102 }
103
104 /* DA9030/DA9034 common operations */
105 static int da903x_set_ldo_voltage(struct regulator_dev *rdev,
106                                   int min_uV, int max_uV)
107 {
108         struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
109         struct device *da9034_dev = to_da903x_dev(rdev);
110         uint8_t val, mask;
111
112         if (check_range(info, min_uV, max_uV)) {
113                 pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
114                 return -EINVAL;
115         }
116
117         val = (min_uV - info->min_uV + info->step_uV - 1) / info->step_uV;
118         val <<= info->vol_shift;
119         mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;
120
121         return da903x_update(da9034_dev, info->vol_reg, val, mask);
122 }
123
124 static int da903x_get_voltage(struct regulator_dev *rdev)
125 {
126         struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
127         struct device *da9034_dev = to_da903x_dev(rdev);
128         uint8_t val, mask;
129         int ret;
130
131         ret = da903x_read(da9034_dev, info->vol_reg, &val);
132         if (ret)
133                 return ret;
134
135         mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;
136         val = (val & mask) >> info->vol_shift;
137
138         return info->min_uV + info->step_uV * val;
139 }
140
141 static int da903x_enable(struct regulator_dev *rdev)
142 {
143         struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
144         struct device *da9034_dev = to_da903x_dev(rdev);
145
146         return da903x_set_bits(da9034_dev, info->enable_reg,
147                                         1 << info->enable_bit);
148 }
149
150 static int da903x_disable(struct regulator_dev *rdev)
151 {
152         struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
153         struct device *da9034_dev = to_da903x_dev(rdev);
154
155         return da903x_clr_bits(da9034_dev, info->enable_reg,
156                                         1 << info->enable_bit);
157 }
158
159 static int da903x_is_enabled(struct regulator_dev *rdev)
160 {
161         struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
162         struct device *da9034_dev = to_da903x_dev(rdev);
163         uint8_t reg_val;
164         int ret;
165
166         ret = da903x_read(da9034_dev, info->enable_reg, &reg_val);
167         if (ret)
168                 return ret;
169
170         return !!(reg_val & (1 << info->enable_bit));
171 }
172
173 /* DA9030 specific operations */
174 static int da9030_set_ldo1_15_voltage(struct regulator_dev *rdev,
175                                        int min_uV, int max_uV)
176 {
177         struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
178         struct device *da903x_dev = to_da903x_dev(rdev);
179         uint8_t val, mask;
180         int ret;
181
182         if (check_range(info, min_uV, max_uV)) {
183                 pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
184                 return -EINVAL;
185         }
186
187         val = (min_uV - info->min_uV + info->step_uV - 1) / info->step_uV;
188         val <<= info->vol_shift;
189         mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;
190         val |= DA9030_LDO_UNLOCK; /* have to set UNLOCK bits */
191         mask |= DA9030_LDO_UNLOCK_MASK;
192
193         /* write twice */
194         ret = da903x_update(da903x_dev, info->vol_reg, val, mask);
195         if (ret)
196                 return ret;
197
198         return da903x_update(da903x_dev, info->vol_reg, val, mask);
199 }
200
201 static int da9030_set_ldo14_voltage(struct regulator_dev *rdev,
202                                   int min_uV, int max_uV)
203 {
204         struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
205         struct device *da903x_dev = to_da903x_dev(rdev);
206         uint8_t val, mask;
207         int thresh;
208
209         if (check_range(info, min_uV, max_uV)) {
210                 pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
211                 return -EINVAL;
212         }
213
214         thresh = (info->max_uV + info->min_uV) / 2;
215         if (min_uV < thresh) {
216                 val = (thresh - min_uV + info->step_uV - 1) / info->step_uV;
217                 val |= 0x4;
218         } else {
219                 val = (min_uV - thresh + info->step_uV - 1) / info->step_uV;
220         }
221
222         val <<= info->vol_shift;
223         mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;
224
225         return da903x_update(da903x_dev, info->vol_reg, val, mask);
226 }
227
228 static int da9030_get_ldo14_voltage(struct regulator_dev *rdev)
229 {
230         struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
231         struct device *da903x_dev = to_da903x_dev(rdev);
232         uint8_t val, mask;
233         int ret;
234
235         ret = da903x_read(da903x_dev, info->vol_reg, &val);
236         if (ret)
237                 return ret;
238
239         mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;
240         val = (val & mask) >> info->vol_shift;
241
242         if (val & 0x4)
243                 return info->min_uV + info->step_uV * (3 - (val & ~0x4));
244         else
245                 return (info->max_uV + info->min_uV) / 2 +
246                         info->step_uV * (val & ~0x4);
247 }
248
249 /* DA9034 specific operations */
250 static int da9034_set_dvc_voltage(struct regulator_dev *rdev,
251                                   int min_uV, int max_uV)
252 {
253         struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
254         struct device *da9034_dev = to_da903x_dev(rdev);
255         uint8_t val, mask;
256         int ret;
257
258         if (check_range(info, min_uV, max_uV)) {
259                 pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
260                 return -EINVAL;
261         }
262
263         val = (min_uV - info->min_uV + info->step_uV - 1) / info->step_uV;
264         val <<= info->vol_shift;
265         mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;
266
267         ret = da903x_update(da9034_dev, info->vol_reg, val, mask);
268         if (ret)
269                 return ret;
270
271         ret = da903x_set_bits(da9034_dev, info->update_reg,
272                                         1 << info->update_bit);
273         return ret;
274 }
275
276 static int da9034_set_ldo12_voltage(struct regulator_dev *rdev,
277                                     int min_uV, int max_uV)
278 {
279         struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
280         struct device *da9034_dev = to_da903x_dev(rdev);
281         uint8_t val, mask;
282
283         if (check_range(info, min_uV, max_uV)) {
284                 pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
285                 return -EINVAL;
286         }
287
288         val = (min_uV - info->min_uV + info->step_uV - 1) / info->step_uV;
289         val = (val > 7 || val < 20) ? 8 : val - 12;
290         val <<= info->vol_shift;
291         mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;
292
293         return da903x_update(da9034_dev, info->vol_reg, val, mask);
294 }
295
296 static int da9034_get_ldo12_voltage(struct regulator_dev *rdev)
297 {
298         struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
299         struct device *da9034_dev = to_da903x_dev(rdev);
300         uint8_t val, mask;
301         int ret;
302
303         ret = da903x_read(da9034_dev, info->vol_reg, &val);
304         if (ret)
305                 return ret;
306
307         mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;
308         val = (val & mask) >> info->vol_shift;
309
310         if (val >= 8)
311                 return 2700000 + info->step_uV * (val - 8);
312
313         return info->min_uV + info->step_uV * val;
314 }
315
316 static struct regulator_ops da903x_regulator_ldo_ops = {
317         .set_voltage    = da903x_set_ldo_voltage,
318         .get_voltage    = da903x_get_voltage,
319         .enable         = da903x_enable,
320         .disable        = da903x_disable,
321         .is_enabled     = da903x_is_enabled,
322 };
323
324 /* NOTE: this is dedicated for the insane DA9030 LDO14 */
325 static struct regulator_ops da9030_regulator_ldo14_ops = {
326         .set_voltage    = da9030_set_ldo14_voltage,
327         .get_voltage    = da9030_get_ldo14_voltage,
328         .enable         = da903x_enable,
329         .disable        = da903x_disable,
330         .is_enabled     = da903x_is_enabled,
331 };
332
333 /* NOTE: this is dedicated for the DA9030 LDO1 and LDO15 that have locks  */
334 static struct regulator_ops da9030_regulator_ldo1_15_ops = {
335         .set_voltage    = da9030_set_ldo1_15_voltage,
336         .get_voltage    = da903x_get_voltage,
337         .enable         = da903x_enable,
338         .disable        = da903x_disable,
339         .is_enabled     = da903x_is_enabled,
340 };
341
342 static struct regulator_ops da9034_regulator_dvc_ops = {
343         .set_voltage    = da9034_set_dvc_voltage,
344         .get_voltage    = da903x_get_voltage,
345         .enable         = da903x_enable,
346         .disable        = da903x_disable,
347         .is_enabled     = da903x_is_enabled,
348 };
349
350 /* NOTE: this is dedicated for the insane LDO12 */
351 static struct regulator_ops da9034_regulator_ldo12_ops = {
352         .set_voltage    = da9034_set_ldo12_voltage,
353         .get_voltage    = da9034_get_ldo12_voltage,
354         .enable         = da903x_enable,
355         .disable        = da903x_disable,
356         .is_enabled     = da903x_is_enabled,
357 };
358
359 #define DA903x_LDO(_pmic, _id, min, max, step, vreg, shift, nbits, ereg, ebit)  \
360 {                                                                       \
361         .desc   = {                                                     \
362                 .name   = "LDO" #_id,                                   \
363                 .ops    = &da903x_regulator_ldo_ops,                    \
364                 .type   = REGULATOR_VOLTAGE,                            \
365                 .id     = _pmic##_ID_LDO##_id,                          \
366                 .owner  = THIS_MODULE,                                  \
367         },                                                              \
368         .min_uV         = (min) * 1000,                                 \
369         .max_uV         = (max) * 1000,                                 \
370         .step_uV        = (step) * 1000,                                \
371         .vol_reg        = _pmic##_##vreg,                               \
372         .vol_shift      = (shift),                                      \
373         .vol_nbits      = (nbits),                                      \
374         .enable_reg     = _pmic##_##ereg,                               \
375         .enable_bit     = (ebit),                                       \
376 }
377
378 #define DA9030_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
379 {                                                                       \
380         .desc   = {                                                     \
381                 .name   = #_id,                                         \
382                 .ops    = &da9034_regulator_dvc_ops,                    \
383                 .type   = REGULATOR_VOLTAGE,                            \
384                 .id     = DA9030_ID_##_id,                              \
385                 .owner  = THIS_MODULE,                                  \
386         },                                                              \
387         .min_uV         = (min) * 1000,                                 \
388         .max_uV         = (max) * 1000,                                 \
389         .step_uV        = (step) * 1000,                                \
390         .vol_reg        = DA9030_##vreg,                                \
391         .vol_shift      = (0),                                          \
392         .vol_nbits      = (nbits),                                      \
393         .update_reg     = DA9030_##ureg,                                \
394         .update_bit     = (ubit),                                       \
395         .enable_reg     = DA9030_##ereg,                                \
396         .enable_bit     = (ebit),                                       \
397 }
398
399 #define DA9034_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
400 {                                                                       \
401         .desc   = {                                                     \
402                 .name   = #_id,                                         \
403                 .ops    = &da9034_regulator_dvc_ops,                    \
404                 .type   = REGULATOR_VOLTAGE,                            \
405                 .id     = DA9034_ID_##_id,                              \
406                 .owner  = THIS_MODULE,                                  \
407         },                                                              \
408         .min_uV         = (min) * 1000,                                 \
409         .max_uV         = (max) * 1000,                                 \
410         .step_uV        = (step) * 1000,                                \
411         .vol_reg        = DA9034_##vreg,                                \
412         .vol_shift      = (0),                                          \
413         .vol_nbits      = (nbits),                                      \
414         .update_reg     = DA9034_##ureg,                                \
415         .update_bit     = (ubit),                                       \
416         .enable_reg     = DA9034_##ereg,                                \
417         .enable_bit     = (ebit),                                       \
418 }
419
420 #define DA9035_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
421 {                                                                       \
422         .desc   = {                                                     \
423                 .name   = #_id,                                         \
424                 .ops    = &da9034_regulator_dvc_ops,                    \
425                 .type   = REGULATOR_VOLTAGE,                            \
426                 .id     = DA9035_ID_##_id,                              \
427                 .owner  = THIS_MODULE,                                  \
428         },                                                              \
429         .min_uV         = (min) * 1000,                                 \
430         .max_uV         = (max) * 1000,                                 \
431         .step_uV        = (step) * 1000,                                \
432         .vol_reg        = DA9035_##vreg,                                \
433         .vol_shift      = (0),                                          \
434         .vol_nbits      = (nbits),                                      \
435         .update_reg     = DA9035_##ureg,                                \
436         .update_bit     = (ubit),                                       \
437         .enable_reg     = DA9035_##ereg,                                \
438         .enable_bit     = (ebit),                                       \
439 }
440
441 #define DA9034_LDO(_id, min, max, step, vreg, shift, nbits, ereg, ebit) \
442         DA903x_LDO(DA9034, _id, min, max, step, vreg, shift, nbits, ereg, ebit)
443
444 #define DA9030_LDO(_id, min, max, step, vreg, shift, nbits, ereg, ebit) \
445         DA903x_LDO(DA9030, _id, min, max, step, vreg, shift, nbits, ereg, ebit)
446
447 static struct da903x_regulator_info da903x_regulator_info[] = {
448         /* DA9030 */
449         DA9030_DVC(BUCK2, 850, 1625, 25, BUCK2DVM1, 5, BUCK2DVM1, 7, RCTL11, 0),
450
451         DA9030_LDO( 1, 1200, 3200, 100,    LDO1, 0, 5, RCTL12, 1),
452         DA9030_LDO( 2, 1800, 3200, 100,   LDO23, 0, 4, RCTL12, 2),
453         DA9030_LDO( 3, 1800, 3200, 100,   LDO23, 4, 4, RCTL12, 3),
454         DA9030_LDO( 4, 1800, 3200, 100,   LDO45, 0, 4, RCTL12, 4),
455         DA9030_LDO( 5, 1800, 3200, 100,   LDO45, 4, 4, RCTL12, 5),
456         DA9030_LDO( 6, 1800, 3200, 100,    LDO6, 0, 4, RCTL12, 6),
457         DA9030_LDO( 7, 1800, 3200, 100,   LDO78, 0, 4, RCTL12, 7),
458         DA9030_LDO( 8, 1800, 3200, 100,   LDO78, 4, 4, RCTL22, 0),
459         DA9030_LDO( 9, 1800, 3200, 100,  LDO912, 0, 4, RCTL22, 1),
460         DA9030_LDO(10, 1800, 3200, 100, LDO1011, 0, 4, RCTL22, 2),
461         DA9030_LDO(11, 1800, 3200, 100, LDO1011, 4, 4, RCTL22, 3),
462         DA9030_LDO(12, 1800, 3200, 100,  LDO912, 4, 4, RCTL22, 4),
463         DA9030_LDO(14, 2760, 2940,  30, LDO1416, 0, 3, RCTL11, 4),
464         DA9030_LDO(15, 1100, 2650,  50,   LDO15, 0, 5, RCTL11, 5),
465         DA9030_LDO(16, 1100, 2650,  50, LDO1416, 3, 5, RCTL11, 6),
466         DA9030_LDO(17, 1800, 3200, 100,   LDO17, 0, 4, RCTL11, 7),
467         DA9030_LDO(18, 1800, 3200, 100, LDO1819, 0, 4, RCTL21, 2),
468         DA9030_LDO(19, 1800, 3200, 100, LDO1819, 4, 4, RCTL21, 1),
469         DA9030_LDO(13, 2100, 2100, 0, INVAL, 0, 0, RCTL11, 3), /* fixed @2.1V */
470
471         /* DA9034 */
472         DA9034_DVC(BUCK1, 725, 1500, 25, ADTV1, 5, VCC1, 0, OVER1, 0),
473         DA9034_DVC(BUCK2, 725, 1500, 25, CDTV1, 5, VCC1, 2, OVER1, 1),
474         DA9034_DVC(LDO2,  725, 1500, 25, SDTV1, 5, VCC1, 4, OVER1, 2),
475         DA9034_DVC(LDO1, 1700, 2075, 25, MDTV1, 4, VCC1, 6, OVER3, 4),
476
477         DA9034_LDO( 3, 1800, 3300, 100,  LDO643, 0, 4, OVER3, 5),
478         DA9034_LDO( 4, 1800, 2900,1100,  LDO643, 4, 1, OVER3, 6),
479         DA9034_LDO( 6, 2500, 2850,  50,  LDO643, 5, 3, OVER2, 0),
480         DA9034_LDO( 7, 2700, 3050,  50,  LDO987, 0, 3, OVER2, 1),
481         DA9034_LDO( 8, 2700, 2850,  50,  LDO987, 3, 2, OVER2, 2),
482         DA9034_LDO( 9, 2700, 3050,  50,  LDO987, 5, 3, OVER2, 3),
483         DA9034_LDO(10, 2700, 3050,  50, LDO1110, 0, 3, OVER2, 4),
484         DA9034_LDO(11, 1800, 3300, 100, LDO1110, 4, 4, OVER2, 5),
485         DA9034_LDO(12, 1700, 3050,  50, LDO1312, 0, 4, OVER3, 6),
486         DA9034_LDO(13, 1800, 3300, 100, LDO1312, 4, 4, OVER2, 7),
487         DA9034_LDO(14, 1800, 3300, 100, LDO1514, 0, 4, OVER3, 0),
488         DA9034_LDO(15, 1800, 3300, 100, LDO1514, 4, 4, OVER3, 1),
489         DA9034_LDO(5, 3100, 3100, 0, INVAL, 0, 0, OVER3, 7), /* fixed @3.1V */
490
491         /* DA9035 */
492         DA9035_DVC(BUCK3, 1800, 2200, 100, 3DTV1, 3, VCC2, 0, OVER3, 3),
493 };
494
495 static inline struct da903x_regulator_info *find_regulator_info(int id)
496 {
497         struct da903x_regulator_info *ri;
498         int i;
499
500         for (i = 0; i < ARRAY_SIZE(da903x_regulator_info); i++) {
501                 ri = &da903x_regulator_info[i];
502                 if (ri->desc.id == id)
503                         return ri;
504         }
505         return NULL;
506 }
507
508 static int __devinit da903x_regulator_probe(struct platform_device *pdev)
509 {
510         struct da903x_regulator_info *ri = NULL;
511         struct regulator_dev *rdev;
512
513         ri = find_regulator_info(pdev->id);
514         if (ri == NULL) {
515                 dev_err(&pdev->dev, "invalid regulator ID specified\n");
516                 return -EINVAL;
517         }
518
519         /* Workaround for the weird LDO12 voltage setting */
520         if (ri->desc.id == DA9034_ID_LDO12)
521                 ri->desc.ops = &da9034_regulator_ldo12_ops;
522
523         if (ri->desc.id == DA9030_ID_LDO14)
524                 ri->desc.ops = &da9030_regulator_ldo14_ops;
525
526         if (ri->desc.id == DA9030_ID_LDO1 || ri->desc.id == DA9030_ID_LDO15)
527                 ri->desc.ops = &da9030_regulator_ldo1_15_ops;
528
529         rdev = regulator_register(&ri->desc, &pdev->dev,
530                                   pdev->dev.platform_data, ri);
531         if (IS_ERR(rdev)) {
532                 dev_err(&pdev->dev, "failed to register regulator %s\n",
533                                 ri->desc.name);
534                 return PTR_ERR(rdev);
535         }
536
537         platform_set_drvdata(pdev, rdev);
538         return 0;
539 }
540
541 static int __devexit da903x_regulator_remove(struct platform_device *pdev)
542 {
543         struct regulator_dev *rdev = platform_get_drvdata(pdev);
544
545         regulator_unregister(rdev);
546         return 0;
547 }
548
549 static struct platform_driver da903x_regulator_driver = {
550         .driver = {
551                 .name   = "da903x-regulator",
552                 .owner  = THIS_MODULE,
553         },
554         .probe          = da903x_regulator_probe,
555         .remove         = __devexit_p(da903x_regulator_remove),
556 };
557
558 static int __init da903x_regulator_init(void)
559 {
560         return platform_driver_register(&da903x_regulator_driver);
561 }
562 subsys_initcall(da903x_regulator_init);
563
564 static void __exit da903x_regulator_exit(void)
565 {
566         platform_driver_unregister(&da903x_regulator_driver);
567 }
568 module_exit(da903x_regulator_exit);
569
570 MODULE_LICENSE("GPL");
571 MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>"
572               "Mike Rapoport <mike@compulab.co.il>");
573 MODULE_DESCRIPTION("Regulator Driver for Dialog Semiconductor DA903X PMIC");
574 MODULE_ALIAS("platform:da903x-regulator");