Commit | Line | Data |
---|---|---|
d619bc14 LW |
1 | /* |
2 | * drivers/regulator/ab3100.c | |
3 | * | |
4 | * Copyright (C) 2008-2009 ST-Ericsson AB | |
5 | * License terms: GNU General Public License (GPL) version 2 | |
6 | * Low-level control of the AB3100 IC Low Dropout (LDO) | |
7 | * regulators, external regulator and buck converter | |
8 | * Author: Mattias Wallin <mattias.wallin@stericsson.com> | |
9 | * Author: Linus Walleij <linus.walleij@stericsson.com> | |
10 | */ | |
11 | ||
12 | #include <linux/module.h> | |
13 | #include <linux/kernel.h> | |
14 | #include <linux/init.h> | |
15 | #include <linux/err.h> | |
d619bc14 LW |
16 | #include <linux/platform_device.h> |
17 | #include <linux/regulator/driver.h> | |
0fd0013c | 18 | #include <linux/mfd/ab3100.h> |
812f9e9d | 19 | #include <linux/mfd/abx500.h> |
d619bc14 LW |
20 | |
21 | /* LDO registers and some handy masking definitions for AB3100 */ | |
22 | #define AB3100_LDO_A 0x40 | |
23 | #define AB3100_LDO_C 0x41 | |
24 | #define AB3100_LDO_D 0x42 | |
25 | #define AB3100_LDO_E 0x43 | |
26 | #define AB3100_LDO_E_SLEEP 0x44 | |
27 | #define AB3100_LDO_F 0x45 | |
28 | #define AB3100_LDO_G 0x46 | |
29 | #define AB3100_LDO_H 0x47 | |
30 | #define AB3100_LDO_H_SLEEP_MODE 0 | |
31 | #define AB3100_LDO_H_SLEEP_EN 2 | |
32 | #define AB3100_LDO_ON 4 | |
33 | #define AB3100_LDO_H_VSEL_AC 5 | |
34 | #define AB3100_LDO_K 0x48 | |
35 | #define AB3100_LDO_EXT 0x49 | |
36 | #define AB3100_BUCK 0x4A | |
37 | #define AB3100_BUCK_SLEEP 0x4B | |
38 | #define AB3100_REG_ON_MASK 0x10 | |
39 | ||
40 | /** | |
41 | * struct ab3100_regulator | |
42 | * A struct passed around the individual regulator functions | |
43 | * @platform_device: platform device holding this regulator | |
fa661258 | 44 | * @dev: handle to the device |
d619bc14 LW |
45 | * @plfdata: AB3100 platform data passed in at probe time |
46 | * @regreg: regulator register number in the AB3100 | |
d619bc14 LW |
47 | */ |
48 | struct ab3100_regulator { | |
49 | struct regulator_dev *rdev; | |
fa661258 | 50 | struct device *dev; |
d619bc14 LW |
51 | struct ab3100_platform_data *plfdata; |
52 | u8 regreg; | |
d619bc14 LW |
53 | }; |
54 | ||
55 | /* The order in which registers are initialized */ | |
56 | static const u8 ab3100_reg_init_order[AB3100_NUM_REGULATORS+2] = { | |
57 | AB3100_LDO_A, | |
58 | AB3100_LDO_C, | |
59 | AB3100_LDO_E, | |
60 | AB3100_LDO_E_SLEEP, | |
61 | AB3100_LDO_F, | |
62 | AB3100_LDO_G, | |
63 | AB3100_LDO_H, | |
64 | AB3100_LDO_K, | |
65 | AB3100_LDO_EXT, | |
66 | AB3100_BUCK, | |
67 | AB3100_BUCK_SLEEP, | |
68 | AB3100_LDO_D, | |
69 | }; | |
70 | ||
71 | /* Preset (hardware defined) voltages for these regulators */ | |
72 | #define LDO_A_VOLTAGE 2750000 | |
73 | #define LDO_C_VOLTAGE 2650000 | |
74 | #define LDO_D_VOLTAGE 2650000 | |
75 | ||
a3beb742 | 76 | static const unsigned int ldo_e_buck_typ_voltages[] = { |
d619bc14 LW |
77 | 1800000, |
78 | 1400000, | |
79 | 1300000, | |
80 | 1200000, | |
81 | 1100000, | |
82 | 1050000, | |
83 | 900000, | |
84 | }; | |
85 | ||
a3beb742 | 86 | static const unsigned int ldo_f_typ_voltages[] = { |
d619bc14 LW |
87 | 1800000, |
88 | 1400000, | |
89 | 1300000, | |
90 | 1200000, | |
91 | 1100000, | |
92 | 1050000, | |
93 | 2500000, | |
94 | 2650000, | |
95 | }; | |
96 | ||
a3beb742 | 97 | static const unsigned int ldo_g_typ_voltages[] = { |
d619bc14 LW |
98 | 2850000, |
99 | 2750000, | |
100 | 1800000, | |
101 | 1500000, | |
102 | }; | |
103 | ||
a3beb742 | 104 | static const unsigned int ldo_h_typ_voltages[] = { |
d619bc14 LW |
105 | 2750000, |
106 | 1800000, | |
107 | 1500000, | |
108 | 1200000, | |
109 | }; | |
110 | ||
a3beb742 | 111 | static const unsigned int ldo_k_typ_voltages[] = { |
d619bc14 LW |
112 | 2750000, |
113 | 1800000, | |
114 | }; | |
115 | ||
116 | ||
117 | /* The regulator devices */ | |
118 | static struct ab3100_regulator | |
119 | ab3100_regulators[AB3100_NUM_REGULATORS] = { | |
120 | { | |
121 | .regreg = AB3100_LDO_A, | |
d619bc14 LW |
122 | }, |
123 | { | |
124 | .regreg = AB3100_LDO_C, | |
d619bc14 LW |
125 | }, |
126 | { | |
127 | .regreg = AB3100_LDO_D, | |
d619bc14 LW |
128 | }, |
129 | { | |
130 | .regreg = AB3100_LDO_E, | |
d619bc14 LW |
131 | }, |
132 | { | |
133 | .regreg = AB3100_LDO_F, | |
d619bc14 LW |
134 | }, |
135 | { | |
136 | .regreg = AB3100_LDO_G, | |
d619bc14 LW |
137 | }, |
138 | { | |
139 | .regreg = AB3100_LDO_H, | |
d619bc14 LW |
140 | }, |
141 | { | |
142 | .regreg = AB3100_LDO_K, | |
d619bc14 LW |
143 | }, |
144 | { | |
145 | .regreg = AB3100_LDO_EXT, | |
146 | /* No voltages for the external regulator */ | |
147 | }, | |
148 | { | |
149 | .regreg = AB3100_BUCK, | |
d619bc14 LW |
150 | }, |
151 | }; | |
152 | ||
153 | /* | |
154 | * General functions for enable, disable and is_enabled used for | |
155 | * LDO: A,C,E,F,G,H,K,EXT and BUCK | |
156 | */ | |
157 | static int ab3100_enable_regulator(struct regulator_dev *reg) | |
158 | { | |
6c3b956b | 159 | struct ab3100_regulator *abreg = rdev_get_drvdata(reg); |
d619bc14 LW |
160 | int err; |
161 | u8 regval; | |
162 | ||
fa661258 | 163 | err = abx500_get_register_interruptible(abreg->dev, 0, abreg->regreg, |
d619bc14 LW |
164 | ®val); |
165 | if (err) { | |
166 | dev_warn(®->dev, "failed to get regid %d value\n", | |
167 | abreg->regreg); | |
168 | return err; | |
169 | } | |
170 | ||
171 | /* The regulator is already on, no reason to go further */ | |
172 | if (regval & AB3100_REG_ON_MASK) | |
173 | return 0; | |
174 | ||
175 | regval |= AB3100_REG_ON_MASK; | |
176 | ||
fa661258 | 177 | err = abx500_set_register_interruptible(abreg->dev, 0, abreg->regreg, |
d619bc14 LW |
178 | regval); |
179 | if (err) { | |
180 | dev_warn(®->dev, "failed to set regid %d value\n", | |
181 | abreg->regreg); | |
182 | return err; | |
183 | } | |
184 | ||
d619bc14 LW |
185 | return 0; |
186 | } | |
187 | ||
188 | static int ab3100_disable_regulator(struct regulator_dev *reg) | |
189 | { | |
6c3b956b | 190 | struct ab3100_regulator *abreg = rdev_get_drvdata(reg); |
d619bc14 LW |
191 | int err; |
192 | u8 regval; | |
193 | ||
194 | /* | |
195 | * LDO D is a special regulator. When it is disabled, the entire | |
196 | * system is shut down. So this is handled specially. | |
197 | */ | |
176f45b9 | 198 | pr_info("Called ab3100_disable_regulator\n"); |
d619bc14 | 199 | if (abreg->regreg == AB3100_LDO_D) { |
d619bc14 | 200 | dev_info(®->dev, "disabling LDO D - shut down system\n"); |
d619bc14 | 201 | /* Setting LDO D to 0x00 cuts the power to the SoC */ |
fa661258 | 202 | return abx500_set_register_interruptible(abreg->dev, 0, |
d619bc14 | 203 | AB3100_LDO_D, 0x00U); |
d619bc14 LW |
204 | } |
205 | ||
206 | /* | |
207 | * All other regulators are handled here | |
208 | */ | |
fa661258 | 209 | err = abx500_get_register_interruptible(abreg->dev, 0, abreg->regreg, |
d619bc14 LW |
210 | ®val); |
211 | if (err) { | |
212 | dev_err(®->dev, "unable to get register 0x%x\n", | |
213 | abreg->regreg); | |
214 | return err; | |
215 | } | |
216 | regval &= ~AB3100_REG_ON_MASK; | |
fa661258 | 217 | return abx500_set_register_interruptible(abreg->dev, 0, abreg->regreg, |
d619bc14 LW |
218 | regval); |
219 | } | |
220 | ||
221 | static int ab3100_is_enabled_regulator(struct regulator_dev *reg) | |
222 | { | |
6c3b956b | 223 | struct ab3100_regulator *abreg = rdev_get_drvdata(reg); |
d619bc14 LW |
224 | u8 regval; |
225 | int err; | |
226 | ||
fa661258 | 227 | err = abx500_get_register_interruptible(abreg->dev, 0, abreg->regreg, |
d619bc14 LW |
228 | ®val); |
229 | if (err) { | |
230 | dev_err(®->dev, "unable to get register 0x%x\n", | |
231 | abreg->regreg); | |
232 | return err; | |
233 | } | |
234 | ||
235 | return regval & AB3100_REG_ON_MASK; | |
236 | } | |
237 | ||
d619bc14 LW |
238 | static int ab3100_get_voltage_regulator(struct regulator_dev *reg) |
239 | { | |
6c3b956b | 240 | struct ab3100_regulator *abreg = rdev_get_drvdata(reg); |
d619bc14 LW |
241 | u8 regval; |
242 | int err; | |
243 | ||
d619bc14 LW |
244 | /* |
245 | * For variable types, read out setting and index into | |
246 | * supplied voltage list. | |
247 | */ | |
fa661258 | 248 | err = abx500_get_register_interruptible(abreg->dev, 0, |
d619bc14 LW |
249 | abreg->regreg, ®val); |
250 | if (err) { | |
251 | dev_warn(®->dev, | |
252 | "failed to get regulator value in register %02x\n", | |
253 | abreg->regreg); | |
254 | return err; | |
255 | } | |
256 | ||
257 | /* The 3 highest bits index voltages */ | |
258 | regval &= 0xE0; | |
259 | regval >>= 5; | |
260 | ||
a3beb742 | 261 | if (regval >= reg->desc->n_voltages) { |
d619bc14 LW |
262 | dev_err(®->dev, |
263 | "regulator register %02x contains an illegal voltage setting\n", | |
264 | abreg->regreg); | |
265 | return -EINVAL; | |
266 | } | |
267 | ||
a3beb742 | 268 | return reg->desc->volt_table[regval]; |
d619bc14 LW |
269 | } |
270 | ||
1f793ff2 AL |
271 | static int ab3100_set_voltage_regulator_sel(struct regulator_dev *reg, |
272 | unsigned selector) | |
d619bc14 | 273 | { |
6c3b956b | 274 | struct ab3100_regulator *abreg = rdev_get_drvdata(reg); |
d619bc14 LW |
275 | u8 regval; |
276 | int err; | |
3a93f2a9 | 277 | |
fa661258 | 278 | err = abx500_get_register_interruptible(abreg->dev, 0, |
d619bc14 LW |
279 | abreg->regreg, ®val); |
280 | if (err) { | |
281 | dev_warn(®->dev, | |
282 | "failed to get regulator register %02x\n", | |
283 | abreg->regreg); | |
284 | return err; | |
285 | } | |
286 | ||
287 | /* The highest three bits control the variable regulators */ | |
288 | regval &= ~0xE0; | |
1f793ff2 | 289 | regval |= (selector << 5); |
d619bc14 | 290 | |
fa661258 | 291 | err = abx500_set_register_interruptible(abreg->dev, 0, |
d619bc14 LW |
292 | abreg->regreg, regval); |
293 | if (err) | |
294 | dev_warn(®->dev, "failed to set regulator register %02x\n", | |
295 | abreg->regreg); | |
296 | ||
297 | return err; | |
298 | } | |
299 | ||
300 | static int ab3100_set_suspend_voltage_regulator(struct regulator_dev *reg, | |
301 | int uV) | |
302 | { | |
6c3b956b | 303 | struct ab3100_regulator *abreg = rdev_get_drvdata(reg); |
d619bc14 LW |
304 | u8 regval; |
305 | int err; | |
306 | int bestindex; | |
307 | u8 targetreg; | |
308 | ||
309 | if (abreg->regreg == AB3100_LDO_E) | |
310 | targetreg = AB3100_LDO_E_SLEEP; | |
311 | else if (abreg->regreg == AB3100_BUCK) | |
312 | targetreg = AB3100_BUCK_SLEEP; | |
313 | else | |
314 | return -EINVAL; | |
315 | ||
316 | /* LDO E and BUCK have special suspend voltages you can set */ | |
b13296d0 | 317 | bestindex = regulator_map_voltage_iterate(reg, uV, uV); |
d619bc14 | 318 | |
fa661258 | 319 | err = abx500_get_register_interruptible(abreg->dev, 0, |
d619bc14 LW |
320 | targetreg, ®val); |
321 | if (err) { | |
322 | dev_warn(®->dev, | |
323 | "failed to get regulator register %02x\n", | |
324 | targetreg); | |
325 | return err; | |
326 | } | |
327 | ||
328 | /* The highest three bits control the variable regulators */ | |
329 | regval &= ~0xE0; | |
330 | regval |= (bestindex << 5); | |
331 | ||
fa661258 | 332 | err = abx500_set_register_interruptible(abreg->dev, 0, |
d619bc14 LW |
333 | targetreg, regval); |
334 | if (err) | |
335 | dev_warn(®->dev, "failed to set regulator register %02x\n", | |
336 | abreg->regreg); | |
337 | ||
338 | return err; | |
339 | } | |
340 | ||
341 | /* | |
342 | * The external regulator can just define a fixed voltage. | |
343 | */ | |
344 | static int ab3100_get_voltage_regulator_external(struct regulator_dev *reg) | |
345 | { | |
6c3b956b | 346 | struct ab3100_regulator *abreg = rdev_get_drvdata(reg); |
d619bc14 LW |
347 | |
348 | return abreg->plfdata->external_voltage; | |
349 | } | |
350 | ||
351 | static struct regulator_ops regulator_ops_fixed = { | |
1bd1955a | 352 | .list_voltage = regulator_list_voltage_linear, |
d619bc14 LW |
353 | .enable = ab3100_enable_regulator, |
354 | .disable = ab3100_disable_regulator, | |
355 | .is_enabled = ab3100_is_enabled_regulator, | |
d619bc14 LW |
356 | }; |
357 | ||
358 | static struct regulator_ops regulator_ops_variable = { | |
359 | .enable = ab3100_enable_regulator, | |
360 | .disable = ab3100_disable_regulator, | |
361 | .is_enabled = ab3100_is_enabled_regulator, | |
362 | .get_voltage = ab3100_get_voltage_regulator, | |
1f793ff2 | 363 | .set_voltage_sel = ab3100_set_voltage_regulator_sel, |
a3beb742 | 364 | .list_voltage = regulator_list_voltage_table, |
d619bc14 LW |
365 | }; |
366 | ||
367 | static struct regulator_ops regulator_ops_variable_sleepable = { | |
368 | .enable = ab3100_enable_regulator, | |
369 | .disable = ab3100_disable_regulator, | |
370 | .is_enabled = ab3100_is_enabled_regulator, | |
371 | .get_voltage = ab3100_get_voltage_regulator, | |
1f793ff2 | 372 | .set_voltage_sel = ab3100_set_voltage_regulator_sel, |
d619bc14 | 373 | .set_suspend_voltage = ab3100_set_suspend_voltage_regulator, |
a3beb742 | 374 | .list_voltage = regulator_list_voltage_table, |
d619bc14 LW |
375 | }; |
376 | ||
377 | /* | |
378 | * LDO EXT is an external regulator so it is really | |
379 | * not possible to set any voltage locally here, AB3100 | |
380 | * is an on/off switch plain an simple. The external | |
381 | * voltage is defined in the board set-up if any. | |
382 | */ | |
383 | static struct regulator_ops regulator_ops_external = { | |
384 | .enable = ab3100_enable_regulator, | |
385 | .disable = ab3100_disable_regulator, | |
386 | .is_enabled = ab3100_is_enabled_regulator, | |
387 | .get_voltage = ab3100_get_voltage_regulator_external, | |
388 | }; | |
389 | ||
390 | static struct regulator_desc | |
391 | ab3100_regulator_desc[AB3100_NUM_REGULATORS] = { | |
392 | { | |
393 | .name = "LDO_A", | |
394 | .id = AB3100_LDO_A, | |
395 | .ops = ®ulator_ops_fixed, | |
1bd1955a | 396 | .n_voltages = 1, |
d619bc14 | 397 | .type = REGULATOR_VOLTAGE, |
64714354 | 398 | .owner = THIS_MODULE, |
1bd1955a | 399 | .min_uV = LDO_A_VOLTAGE, |
f8568cbd | 400 | .enable_time = 200, |
d619bc14 LW |
401 | }, |
402 | { | |
403 | .name = "LDO_C", | |
404 | .id = AB3100_LDO_C, | |
405 | .ops = ®ulator_ops_fixed, | |
1bd1955a | 406 | .n_voltages = 1, |
d619bc14 | 407 | .type = REGULATOR_VOLTAGE, |
64714354 | 408 | .owner = THIS_MODULE, |
1bd1955a | 409 | .min_uV = LDO_C_VOLTAGE, |
f8568cbd | 410 | .enable_time = 200, |
d619bc14 LW |
411 | }, |
412 | { | |
413 | .name = "LDO_D", | |
414 | .id = AB3100_LDO_D, | |
415 | .ops = ®ulator_ops_fixed, | |
1bd1955a | 416 | .n_voltages = 1, |
d619bc14 | 417 | .type = REGULATOR_VOLTAGE, |
64714354 | 418 | .owner = THIS_MODULE, |
1bd1955a | 419 | .min_uV = LDO_D_VOLTAGE, |
f8568cbd | 420 | .enable_time = 200, |
d619bc14 LW |
421 | }, |
422 | { | |
423 | .name = "LDO_E", | |
424 | .id = AB3100_LDO_E, | |
425 | .ops = ®ulator_ops_variable_sleepable, | |
75f2ba8f | 426 | .n_voltages = ARRAY_SIZE(ldo_e_buck_typ_voltages), |
a3beb742 | 427 | .volt_table = ldo_e_buck_typ_voltages, |
d619bc14 | 428 | .type = REGULATOR_VOLTAGE, |
64714354 | 429 | .owner = THIS_MODULE, |
f8568cbd | 430 | .enable_time = 200, |
d619bc14 LW |
431 | }, |
432 | { | |
433 | .name = "LDO_F", | |
434 | .id = AB3100_LDO_F, | |
435 | .ops = ®ulator_ops_variable, | |
75f2ba8f | 436 | .n_voltages = ARRAY_SIZE(ldo_f_typ_voltages), |
a3beb742 | 437 | .volt_table = ldo_f_typ_voltages, |
d619bc14 | 438 | .type = REGULATOR_VOLTAGE, |
64714354 | 439 | .owner = THIS_MODULE, |
f8568cbd | 440 | .enable_time = 600, |
d619bc14 LW |
441 | }, |
442 | { | |
443 | .name = "LDO_G", | |
444 | .id = AB3100_LDO_G, | |
445 | .ops = ®ulator_ops_variable, | |
75f2ba8f | 446 | .n_voltages = ARRAY_SIZE(ldo_g_typ_voltages), |
a3beb742 | 447 | .volt_table = ldo_g_typ_voltages, |
d619bc14 | 448 | .type = REGULATOR_VOLTAGE, |
64714354 | 449 | .owner = THIS_MODULE, |
f8568cbd | 450 | .enable_time = 400, |
d619bc14 LW |
451 | }, |
452 | { | |
453 | .name = "LDO_H", | |
454 | .id = AB3100_LDO_H, | |
455 | .ops = ®ulator_ops_variable, | |
75f2ba8f | 456 | .n_voltages = ARRAY_SIZE(ldo_h_typ_voltages), |
a3beb742 | 457 | .volt_table = ldo_h_typ_voltages, |
d619bc14 | 458 | .type = REGULATOR_VOLTAGE, |
64714354 | 459 | .owner = THIS_MODULE, |
f8568cbd | 460 | .enable_time = 200, |
d619bc14 LW |
461 | }, |
462 | { | |
463 | .name = "LDO_K", | |
464 | .id = AB3100_LDO_K, | |
465 | .ops = ®ulator_ops_variable, | |
75f2ba8f | 466 | .n_voltages = ARRAY_SIZE(ldo_k_typ_voltages), |
a3beb742 | 467 | .volt_table = ldo_k_typ_voltages, |
d619bc14 | 468 | .type = REGULATOR_VOLTAGE, |
64714354 | 469 | .owner = THIS_MODULE, |
f8568cbd | 470 | .enable_time = 200, |
d619bc14 LW |
471 | }, |
472 | { | |
473 | .name = "LDO_EXT", | |
474 | .id = AB3100_LDO_EXT, | |
475 | .ops = ®ulator_ops_external, | |
476 | .type = REGULATOR_VOLTAGE, | |
64714354 | 477 | .owner = THIS_MODULE, |
d619bc14 LW |
478 | }, |
479 | { | |
480 | .name = "BUCK", | |
481 | .id = AB3100_BUCK, | |
482 | .ops = ®ulator_ops_variable_sleepable, | |
75f2ba8f | 483 | .n_voltages = ARRAY_SIZE(ldo_e_buck_typ_voltages), |
cfa9cfbc | 484 | .volt_table = ldo_e_buck_typ_voltages, |
d619bc14 | 485 | .type = REGULATOR_VOLTAGE, |
64714354 | 486 | .owner = THIS_MODULE, |
f8568cbd | 487 | .enable_time = 1000, |
d619bc14 LW |
488 | }, |
489 | }; | |
490 | ||
491 | /* | |
492 | * NOTE: the following functions are regulators pluralis - it is the | |
493 | * binding to the AB3100 core driver and the parent platform device | |
494 | * for all the different regulators. | |
495 | */ | |
496 | ||
98bf7c05 | 497 | static int __devinit ab3100_regulators_probe(struct platform_device *pdev) |
d619bc14 | 498 | { |
a771e36e | 499 | struct ab3100_platform_data *plfdata = pdev->dev.platform_data; |
c172708d | 500 | struct regulator_config config = { }; |
d619bc14 LW |
501 | int err = 0; |
502 | u8 data; | |
503 | int i; | |
504 | ||
505 | /* Check chip state */ | |
fa661258 | 506 | err = abx500_get_register_interruptible(&pdev->dev, 0, |
d619bc14 LW |
507 | AB3100_LDO_D, &data); |
508 | if (err) { | |
509 | dev_err(&pdev->dev, "could not read initial status of LDO_D\n"); | |
510 | return err; | |
511 | } | |
512 | if (data & 0x10) | |
513 | dev_notice(&pdev->dev, | |
514 | "chip is already in active mode (Warm start)\n"); | |
515 | else | |
516 | dev_notice(&pdev->dev, | |
517 | "chip is in inactive mode (Cold start)\n"); | |
518 | ||
519 | /* Set up regulators */ | |
520 | for (i = 0; i < ARRAY_SIZE(ab3100_reg_init_order); i++) { | |
fa661258 | 521 | err = abx500_set_register_interruptible(&pdev->dev, 0, |
d619bc14 LW |
522 | ab3100_reg_init_order[i], |
523 | plfdata->reg_initvals[i]); | |
524 | if (err) { | |
525 | dev_err(&pdev->dev, "regulator initialization failed with error %d\n", | |
526 | err); | |
527 | return err; | |
528 | } | |
529 | } | |
530 | ||
d619bc14 LW |
531 | /* Register the regulators */ |
532 | for (i = 0; i < AB3100_NUM_REGULATORS; i++) { | |
533 | struct ab3100_regulator *reg = &ab3100_regulators[i]; | |
534 | struct regulator_dev *rdev; | |
535 | ||
536 | /* | |
537 | * Initialize per-regulator struct. | |
538 | * Inherit platform data, this comes down from the | |
539 | * i2c boarddata, from the machine. So if you want to | |
540 | * see what it looks like for a certain machine, go | |
541 | * into the machine I2C setup. | |
542 | */ | |
fa661258 | 543 | reg->dev = &pdev->dev; |
d619bc14 LW |
544 | reg->plfdata = plfdata; |
545 | ||
c172708d MB |
546 | config.dev = &pdev->dev; |
547 | config.driver_data = reg; | |
548 | config.init_data = &plfdata->reg_constraints[i]; | |
549 | ||
d619bc14 LW |
550 | /* |
551 | * Register the regulator, pass around | |
552 | * the ab3100_regulator struct | |
553 | */ | |
c172708d | 554 | rdev = regulator_register(&ab3100_regulator_desc[i], &config); |
d619bc14 LW |
555 | if (IS_ERR(rdev)) { |
556 | err = PTR_ERR(rdev); | |
557 | dev_err(&pdev->dev, | |
558 | "%s: failed to register regulator %s err %d\n", | |
559 | __func__, ab3100_regulator_desc[i].name, | |
560 | err); | |
d619bc14 | 561 | /* remove the already registered regulators */ |
b3fcf3e5 | 562 | while (--i >= 0) |
d619bc14 | 563 | regulator_unregister(ab3100_regulators[i].rdev); |
d619bc14 LW |
564 | return err; |
565 | } | |
566 | ||
567 | /* Then set a pointer back to the registered regulator */ | |
568 | reg->rdev = rdev; | |
569 | } | |
570 | ||
571 | return 0; | |
572 | } | |
573 | ||
98bf7c05 | 574 | static int __devexit ab3100_regulators_remove(struct platform_device *pdev) |
d619bc14 LW |
575 | { |
576 | int i; | |
577 | ||
578 | for (i = 0; i < AB3100_NUM_REGULATORS; i++) { | |
579 | struct ab3100_regulator *reg = &ab3100_regulators[i]; | |
580 | ||
581 | regulator_unregister(reg->rdev); | |
582 | } | |
583 | return 0; | |
584 | } | |
585 | ||
586 | static struct platform_driver ab3100_regulators_driver = { | |
587 | .driver = { | |
588 | .name = "ab3100-regulators", | |
589 | .owner = THIS_MODULE, | |
590 | }, | |
591 | .probe = ab3100_regulators_probe, | |
5eb9f2b9 | 592 | .remove = ab3100_regulators_remove, |
d619bc14 LW |
593 | }; |
594 | ||
595 | static __init int ab3100_regulators_init(void) | |
596 | { | |
597 | return platform_driver_register(&ab3100_regulators_driver); | |
598 | } | |
599 | ||
600 | static __exit void ab3100_regulators_exit(void) | |
601 | { | |
176f45b9 | 602 | platform_driver_unregister(&ab3100_regulators_driver); |
d619bc14 LW |
603 | } |
604 | ||
605 | subsys_initcall(ab3100_regulators_init); | |
606 | module_exit(ab3100_regulators_exit); | |
607 | ||
608 | MODULE_AUTHOR("Mattias Wallin <mattias.wallin@stericsson.com>"); | |
609 | MODULE_DESCRIPTION("AB3100 Regulator driver"); | |
610 | MODULE_LICENSE("GPL"); | |
611 | MODULE_ALIAS("platform:ab3100-regulators"); |