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regulator: da903x: Convert to regulator_list_voltage_linear()
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / regulator / da903x.c
blob3a0d0800374e1d3f2127bd110641624c24abc24c
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/module.h>
16 #include <linux/platform_device.h>
17 #include <linux/regulator/driver.h>
18 #include <linux/regulator/machine.h>
19 #include <linux/mfd/da903x.h>
20
21 /* DA9030 Registers */
22 #define DA9030_INVAL (-1)
23 #define DA9030_LDO1011 (0x10)
24 #define DA9030_LDO15 (0x11)
25 #define DA9030_LDO1416 (0x12)
26 #define DA9030_LDO1819 (0x13)
27 #define DA9030_LDO17 (0x14)
28 #define DA9030_BUCK2DVM1 (0x15)
29 #define DA9030_BUCK2DVM2 (0x16)
30 #define DA9030_RCTL11 (0x17)
31 #define DA9030_RCTL21 (0x18)
32 #define DA9030_LDO1 (0x90)
33 #define DA9030_LDO23 (0x91)
34 #define DA9030_LDO45 (0x92)
35 #define DA9030_LDO6 (0x93)
36 #define DA9030_LDO78 (0x94)
37 #define DA9030_LDO912 (0x95)
38 #define DA9030_BUCK (0x96)
39 #define DA9030_RCTL12 (0x97)
40 #define DA9030_RCTL22 (0x98)
41 #define DA9030_LDO_UNLOCK (0xa0)
42 #define DA9030_LDO_UNLOCK_MASK (0xe0)
43 #define DA9034_OVER1 (0x10)
44
45 /* DA9034 Registers */
46 #define DA9034_INVAL (-1)
47 #define DA9034_OVER2 (0x11)
48 #define DA9034_OVER3 (0x12)
49 #define DA9034_LDO643 (0x13)
50 #define DA9034_LDO987 (0x14)
51 #define DA9034_LDO1110 (0x15)
52 #define DA9034_LDO1312 (0x16)
53 #define DA9034_LDO1514 (0x17)
54 #define DA9034_VCC1 (0x20)
55 #define DA9034_ADTV1 (0x23)
56 #define DA9034_ADTV2 (0x24)
57 #define DA9034_AVRC (0x25)
58 #define DA9034_CDTV1 (0x26)
59 #define DA9034_CDTV2 (0x27)
60 #define DA9034_CVRC (0x28)
61 #define DA9034_SDTV1 (0x29)
62 #define DA9034_SDTV2 (0x2a)
63 #define DA9034_SVRC (0x2b)
64 #define DA9034_MDTV1 (0x32)
65 #define DA9034_MDTV2 (0x33)
66 #define DA9034_MVRC (0x34)
67
68 /* DA9035 Registers. DA9034 Registers are comptabile to DA9035. */
69 #define DA9035_OVER3 (0x12)
70 #define DA9035_VCC2 (0x1f)
71 #define DA9035_3DTV1 (0x2c)
72 #define DA9035_3DTV2 (0x2d)
73 #define DA9035_3VRC (0x2e)
74 #define DA9035_AUTOSKIP (0x2f)
75
76 struct da903x_regulator_info {
77 struct regulator_desc desc;
78
79 int max_uV;
80 int vol_reg;
81 int vol_shift;
82 int vol_nbits;
83 int update_reg;
84 int update_bit;
85 int enable_reg;
86 int enable_bit;
87 };
88
89 static inline struct device *to_da903x_dev(struct regulator_dev *rdev)
90 {
91 return rdev_get_dev(rdev)->parent->parent;
92 }
93
94 static inline int check_range(struct da903x_regulator_info *info,
95 int min_uV, int max_uV)
96 {
97 if (min_uV < info->desc.min_uV || min_uV > info->max_uV)
98 return -EINVAL;
99
100 return 0;
101 }
102
103 /* DA9030/DA9034 common operations */
104 static int da903x_set_ldo_voltage(struct regulator_dev *rdev,
105 int min_uV, int max_uV, unsigned *selector)
106 {
107 struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
108 struct device *da9034_dev = to_da903x_dev(rdev);
109 uint8_t val, mask;
110
111 if (check_range(info, min_uV, max_uV)) {
112 pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
113 return -EINVAL;
114 }
115
116 val = DIV_ROUND_UP(min_uV - info->desc.min_uV, info->desc.uV_step);
117 *selector = val;
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_sel(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 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 unsigned *selector)
177 {
178 struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
179 struct device *da903x_dev = to_da903x_dev(rdev);
180 uint8_t val, mask;
181 int ret;
182
183 if (check_range(info, min_uV, max_uV)) {
184 pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
185 return -EINVAL;
186 }
187
188 val = DIV_ROUND_UP(min_uV - info->desc.min_uV, info->desc.uV_step);
189 *selector = val;
190 val <<= info->vol_shift;
191 mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
192 val |= DA9030_LDO_UNLOCK; /* have to set UNLOCK bits */
193 mask |= DA9030_LDO_UNLOCK_MASK;
194
195 /* write twice */
196 ret = da903x_update(da903x_dev, info->vol_reg, val, mask);
197 if (ret)
198 return ret;
199
200 return da903x_update(da903x_dev, info->vol_reg, val, mask);
201 }
202
203 static int da9030_set_ldo14_voltage(struct regulator_dev *rdev,
204 int min_uV, int max_uV,
205 unsigned *selector)
206 {
207 struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
208 struct device *da903x_dev = to_da903x_dev(rdev);
209 uint8_t val, mask;
210 int thresh;
211
212 if (check_range(info, min_uV, max_uV)) {
213 pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
214 return -EINVAL;
215 }
216
217 thresh = (info->max_uV + info->desc.min_uV) / 2;
218 if (min_uV < thresh) {
219 val = DIV_ROUND_UP(thresh - min_uV, info->desc.uV_step);
220 val |= 0x4;
221 } else {
222 val = DIV_ROUND_UP(min_uV - thresh, info->desc.uV_step);
223 }
224
225 *selector = val;
226 val <<= info->vol_shift;
227 mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
228
229 return da903x_update(da903x_dev, info->vol_reg, val, mask);
230 }
231
232 static int da9030_get_ldo14_voltage_sel(struct regulator_dev *rdev)
233 {
234 struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
235 struct device *da903x_dev = to_da903x_dev(rdev);
236 uint8_t val, mask;
237 int ret;
238
239 ret = da903x_read(da903x_dev, info->vol_reg, &val);
240 if (ret)
241 return ret;
242
243 mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
244 val = (val & mask) >> info->vol_shift;
245
246 return val;
247 }
248
249 static int da9030_list_ldo14_voltage(struct regulator_dev *rdev,
250 unsigned selector)
251 {
252 struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
253 int volt;
254
255 if (selector & 0x4)
256 volt = rdev->desc->min_uV +
257 rdev->desc->uV_step * (3 - (selector & ~0x4));
258 else
259 volt = (info->max_uV + rdev->desc->min_uV) / 2 +
260 rdev->desc->uV_step * (selector & ~0x4);
261
262 if (volt > info->max_uV)
263 return -EINVAL;
264
265 return volt;
266 }
267
268 /* DA9034 specific operations */
269 static int da9034_set_dvc_voltage(struct regulator_dev *rdev,
270 int min_uV, int max_uV, unsigned *selector)
271 {
272 struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
273 struct device *da9034_dev = to_da903x_dev(rdev);
274 uint8_t val, mask;
275 int ret;
276
277 if (check_range(info, min_uV, max_uV)) {
278 pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
279 return -EINVAL;
280 }
281
282 val = DIV_ROUND_UP(min_uV - info->desc.min_uV, info->desc.uV_step);
283 *selector = val;
284 val <<= info->vol_shift;
285 mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
286
287 ret = da903x_update(da9034_dev, info->vol_reg, val, mask);
288 if (ret)
289 return ret;
290
291 ret = da903x_set_bits(da9034_dev, info->update_reg,
292 1 << info->update_bit);
293 return ret;
294 }
295
296 static int da9034_set_ldo12_voltage(struct regulator_dev *rdev,
297 int min_uV, int max_uV, unsigned *selector)
298 {
299 struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
300 struct device *da9034_dev = to_da903x_dev(rdev);
301 uint8_t val, mask;
302
303 if (check_range(info, min_uV, max_uV)) {
304 pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
305 return -EINVAL;
306 }
307
308 val = DIV_ROUND_UP(min_uV - info->desc.min_uV, info->desc.uV_step);
309 val = (val >= 20) ? val - 12 : ((val > 7) ? 8 : val);
310 *selector = val;
311 val <<= info->vol_shift;
312 mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
313
314 return da903x_update(da9034_dev, info->vol_reg, val, mask);
315 }
316
317 static int da9034_get_ldo12_voltage_sel(struct regulator_dev *rdev)
318 {
319 struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
320 struct device *da9034_dev = to_da903x_dev(rdev);
321 uint8_t val, mask;
322 int ret;
323
324 ret = da903x_read(da9034_dev, info->vol_reg, &val);
325 if (ret)
326 return ret;
327
328 mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
329 val = (val & mask) >> info->vol_shift;
330
331 return val;
332 }
333
334 static int da9034_list_ldo12_voltage(struct regulator_dev *rdev,
335 unsigned selector)
336 {
337 struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
338 int volt;
339
340 if (selector >= 8)
341 volt = 2700000 + rdev->desc->uV_step * (selector - 8);
342 else
343 volt = rdev->desc->min_uV + rdev->desc->uV_step * selector;
344
345 if (volt > info->max_uV)
346 return -EINVAL;
347
348 return volt;
349 }
350
351 static struct regulator_ops da903x_regulator_ldo_ops = {
352 .set_voltage = da903x_set_ldo_voltage,
353 .get_voltage_sel = da903x_get_voltage_sel,
354 .list_voltage = regulator_list_voltage_linear,
355 .enable = da903x_enable,
356 .disable = da903x_disable,
357 .is_enabled = da903x_is_enabled,
358 };
359
360 /* NOTE: this is dedicated for the insane DA9030 LDO14 */
361 static struct regulator_ops da9030_regulator_ldo14_ops = {
362 .set_voltage = da9030_set_ldo14_voltage,
363 .get_voltage_sel = da9030_get_ldo14_voltage_sel,
364 .list_voltage = da9030_list_ldo14_voltage,
365 .enable = da903x_enable,
366 .disable = da903x_disable,
367 .is_enabled = da903x_is_enabled,
368 };
369
370 /* NOTE: this is dedicated for the DA9030 LDO1 and LDO15 that have locks */
371 static struct regulator_ops da9030_regulator_ldo1_15_ops = {
372 .set_voltage = da9030_set_ldo1_15_voltage,
373 .get_voltage_sel = da903x_get_voltage_sel,
374 .list_voltage = regulator_list_voltage_linear,
375 .enable = da903x_enable,
376 .disable = da903x_disable,
377 .is_enabled = da903x_is_enabled,
378 };
379
380 static struct regulator_ops da9034_regulator_dvc_ops = {
381 .set_voltage = da9034_set_dvc_voltage,
382 .get_voltage_sel = da903x_get_voltage_sel,
383 .list_voltage = regulator_list_voltage_linear,
384 .enable = da903x_enable,
385 .disable = da903x_disable,
386 .is_enabled = da903x_is_enabled,
387 };
388
389 /* NOTE: this is dedicated for the insane LDO12 */
390 static struct regulator_ops da9034_regulator_ldo12_ops = {
391 .set_voltage = da9034_set_ldo12_voltage,
392 .get_voltage_sel = da9034_get_ldo12_voltage_sel,
393 .list_voltage = da9034_list_ldo12_voltage,
394 .enable = da903x_enable,
395 .disable = da903x_disable,
396 .is_enabled = da903x_is_enabled,
397 };
398
399 #define DA903x_LDO(_pmic, _id, min, max, step, vreg, shift, nbits, ereg, ebit) \
400 { \
401 .desc = { \
402 .name = "LDO" #_id, \
403 .ops = &da903x_regulator_ldo_ops, \
404 .type = REGULATOR_VOLTAGE, \
405 .id = _pmic##_ID_LDO##_id, \
406 .n_voltages = (step) ? ((max - min) / step + 1) : 1, \
407 .owner = THIS_MODULE, \
408 .min_uV = (min) * 1000, \
409 .uV_step = (step) * 1000, \
410 }, \
411 .max_uV = (max) * 1000, \
412 .vol_reg = _pmic##_##vreg, \
413 .vol_shift = (shift), \
414 .vol_nbits = (nbits), \
415 .enable_reg = _pmic##_##ereg, \
416 .enable_bit = (ebit), \
417 }
418
419 #define DA903x_DVC(_pmic, _id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
420 { \
421 .desc = { \
422 .name = #_id, \
423 .ops = &da9034_regulator_dvc_ops, \
424 .type = REGULATOR_VOLTAGE, \
425 .id = _pmic##_ID_##_id, \
426 .n_voltages = (step) ? ((max - min) / step + 1) : 1, \
427 .owner = THIS_MODULE, \
428 .min_uV = (min) * 1000, \
429 .uV_step = (step) * 1000, \
430 }, \
431 .max_uV = (max) * 1000, \
432 .vol_reg = _pmic##_##vreg, \
433 .vol_shift = (0), \
434 .vol_nbits = (nbits), \
435 .update_reg = _pmic##_##ureg, \
436 .update_bit = (ubit), \
437 .enable_reg = _pmic##_##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 #define DA9030_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
448 DA903x_DVC(DA9030, _id, min, max, step, vreg, nbits, ureg, ubit, \
449 ereg, ebit)
450
451 #define DA9034_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
452 DA903x_DVC(DA9034, _id, min, max, step, vreg, nbits, ureg, ubit, \
453 ereg, ebit)
454
455 #define DA9035_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
456 DA903x_DVC(DA9035, _id, min, max, step, vreg, nbits, ureg, ubit, \
457 ereg, ebit)
458
459 static struct da903x_regulator_info da903x_regulator_info[] = {
460 /* DA9030 */
461 DA9030_DVC(BUCK2, 850, 1625, 25, BUCK2DVM1, 5, BUCK2DVM1, 7, RCTL11, 0),
462
463 DA9030_LDO( 1, 1200, 3200, 100, LDO1, 0, 5, RCTL12, 1),
464 DA9030_LDO( 2, 1800, 3200, 100, LDO23, 0, 4, RCTL12, 2),
465 DA9030_LDO( 3, 1800, 3200, 100, LDO23, 4, 4, RCTL12, 3),
466 DA9030_LDO( 4, 1800, 3200, 100, LDO45, 0, 4, RCTL12, 4),
467 DA9030_LDO( 5, 1800, 3200, 100, LDO45, 4, 4, RCTL12, 5),
468 DA9030_LDO( 6, 1800, 3200, 100, LDO6, 0, 4, RCTL12, 6),
469 DA9030_LDO( 7, 1800, 3200, 100, LDO78, 0, 4, RCTL12, 7),
470 DA9030_LDO( 8, 1800, 3200, 100, LDO78, 4, 4, RCTL22, 0),
471 DA9030_LDO( 9, 1800, 3200, 100, LDO912, 0, 4, RCTL22, 1),
472 DA9030_LDO(10, 1800, 3200, 100, LDO1011, 0, 4, RCTL22, 2),
473 DA9030_LDO(11, 1800, 3200, 100, LDO1011, 4, 4, RCTL22, 3),
474 DA9030_LDO(12, 1800, 3200, 100, LDO912, 4, 4, RCTL22, 4),
475 DA9030_LDO(14, 2760, 2940, 30, LDO1416, 0, 3, RCTL11, 4),
476 DA9030_LDO(15, 1100, 2650, 50, LDO15, 0, 5, RCTL11, 5),
477 DA9030_LDO(16, 1100, 2650, 50, LDO1416, 3, 5, RCTL11, 6),
478 DA9030_LDO(17, 1800, 3200, 100, LDO17, 0, 4, RCTL11, 7),
479 DA9030_LDO(18, 1800, 3200, 100, LDO1819, 0, 4, RCTL21, 2),
480 DA9030_LDO(19, 1800, 3200, 100, LDO1819, 4, 4, RCTL21, 1),
481 DA9030_LDO(13, 2100, 2100, 0, INVAL, 0, 0, RCTL11, 3), /* fixed @2.1V */
482
483 /* DA9034 */
484 DA9034_DVC(BUCK1, 725, 1500, 25, ADTV2, 5, VCC1, 0, OVER1, 0),
485 DA9034_DVC(BUCK2, 725, 1500, 25, CDTV2, 5, VCC1, 2, OVER1, 1),
486 DA9034_DVC(LDO2, 725, 1500, 25, SDTV2, 5, VCC1, 4, OVER1, 2),
487 DA9034_DVC(LDO1, 1700, 2075, 25, MDTV1, 4, VCC1, 6, OVER3, 4),
488
489 DA9034_LDO( 3, 1800, 3300, 100, LDO643, 0, 4, OVER3, 5),
490 DA9034_LDO( 4, 1800, 2900,1100, LDO643, 4, 1, OVER3, 6),
491 DA9034_LDO( 6, 2500, 2850, 50, LDO643, 5, 3, OVER2, 0),
492 DA9034_LDO( 7, 2700, 3050, 50, LDO987, 0, 3, OVER2, 1),
493 DA9034_LDO( 8, 2700, 2850, 50, LDO987, 3, 2, OVER2, 2),
494 DA9034_LDO( 9, 2700, 3050, 50, LDO987, 5, 3, OVER2, 3),
495 DA9034_LDO(10, 2700, 3050, 50, LDO1110, 0, 3, OVER2, 4),
496 DA9034_LDO(11, 1800, 3300, 100, LDO1110, 4, 4, OVER2, 5),
497 DA9034_LDO(12, 1700, 3050, 50, LDO1312, 0, 4, OVER3, 6),
498 DA9034_LDO(13, 1800, 3300, 100, LDO1312, 4, 4, OVER2, 7),
499 DA9034_LDO(14, 1800, 3300, 100, LDO1514, 0, 4, OVER3, 0),
500 DA9034_LDO(15, 1800, 3300, 100, LDO1514, 4, 4, OVER3, 1),
501 DA9034_LDO(5, 3100, 3100, 0, INVAL, 0, 0, OVER3, 7), /* fixed @3.1V */
502
503 /* DA9035 */
504 DA9035_DVC(BUCK3, 1800, 2200, 100, 3DTV1, 3, VCC2, 0, OVER3, 3),
505 };
506
507 static inline struct da903x_regulator_info *find_regulator_info(int id)
508 {
509 struct da903x_regulator_info *ri;
510 int i;
511
512 for (i = 0; i < ARRAY_SIZE(da903x_regulator_info); i++) {
513 ri = &da903x_regulator_info[i];
514 if (ri->desc.id == id)
515 return ri;
516 }
517 return NULL;
518 }
519
520 static int __devinit da903x_regulator_probe(struct platform_device *pdev)
521 {
522 struct da903x_regulator_info *ri = NULL;
523 struct regulator_dev *rdev;
524 struct regulator_config config = { };
525
526 ri = find_regulator_info(pdev->id);
527 if (ri == NULL) {
528 dev_err(&pdev->dev, "invalid regulator ID specified\n");
529 return -EINVAL;
530 }
531
532 /* Workaround for the weird LDO12 voltage setting */
533 if (ri->desc.id == DA9034_ID_LDO12) {
534 ri->desc.ops = &da9034_regulator_ldo12_ops;
535 ri->desc.n_voltages = 16;
536 }
537
538 if (ri->desc.id == DA9030_ID_LDO14)
539 ri->desc.ops = &da9030_regulator_ldo14_ops;
540
541 if (ri->desc.id == DA9030_ID_LDO1 || ri->desc.id == DA9030_ID_LDO15)
542 ri->desc.ops = &da9030_regulator_ldo1_15_ops;
543
544 config.dev = &pdev->dev;
545 config.init_data = pdev->dev.platform_data;
546 config.driver_data = ri;
547
548 rdev = regulator_register(&ri->desc, &config);
549 if (IS_ERR(rdev)) {
550 dev_err(&pdev->dev, "failed to register regulator %s\n",
551 ri->desc.name);
552 return PTR_ERR(rdev);
553 }
554
555 platform_set_drvdata(pdev, rdev);
556 return 0;
557 }
558
559 static int __devexit da903x_regulator_remove(struct platform_device *pdev)
560 {
561 struct regulator_dev *rdev = platform_get_drvdata(pdev);
562
563 regulator_unregister(rdev);
564 return 0;
565 }
566
567 static struct platform_driver da903x_regulator_driver = {
568 .driver = {
569 .name = "da903x-regulator",
570 .owner = THIS_MODULE,
571 },
572 .probe = da903x_regulator_probe,
573 .remove = __devexit_p(da903x_regulator_remove),
574 };
575
576 static int __init da903x_regulator_init(void)
577 {
578 return platform_driver_register(&da903x_regulator_driver);
579 }
580 subsys_initcall(da903x_regulator_init);
581
582 static void __exit da903x_regulator_exit(void)
583 {
584 platform_driver_unregister(&da903x_regulator_driver);
585 }
586 module_exit(da903x_regulator_exit);
587
588 MODULE_LICENSE("GPL");
589 MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>"
590 "Mike Rapoport <mike@compulab.co.il>");
591 MODULE_DESCRIPTION("Regulator Driver for Dialog Semiconductor DA903X PMIC");
592 MODULE_ALIAS("platform:da903x-regulator");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree