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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> | |
812f9e9d | 18 | #include <linux/mfd/abx500.h> |
d619bc14 LW |
19 | |
20 | /* LDO registers and some handy masking definitions for AB3100 */ | |
21 | #define AB3100_LDO_A 0x40 | |
22 | #define AB3100_LDO_C 0x41 | |
23 | #define AB3100_LDO_D 0x42 | |
24 | #define AB3100_LDO_E 0x43 | |
25 | #define AB3100_LDO_E_SLEEP 0x44 | |
26 | #define AB3100_LDO_F 0x45 | |
27 | #define AB3100_LDO_G 0x46 | |
28 | #define AB3100_LDO_H 0x47 | |
29 | #define AB3100_LDO_H_SLEEP_MODE 0 | |
30 | #define AB3100_LDO_H_SLEEP_EN 2 | |
31 | #define AB3100_LDO_ON 4 | |
32 | #define AB3100_LDO_H_VSEL_AC 5 | |
33 | #define AB3100_LDO_K 0x48 | |
34 | #define AB3100_LDO_EXT 0x49 | |
35 | #define AB3100_BUCK 0x4A | |
36 | #define AB3100_BUCK_SLEEP 0x4B | |
37 | #define AB3100_REG_ON_MASK 0x10 | |
38 | ||
39 | /** | |
40 | * struct ab3100_regulator | |
41 | * A struct passed around the individual regulator functions | |
42 | * @platform_device: platform device holding this regulator | |
fa661258 | 43 | * @dev: handle to the device |
d619bc14 LW |
44 | * @plfdata: AB3100 platform data passed in at probe time |
45 | * @regreg: regulator register number in the AB3100 | |
46 | * @fixed_voltage: a fixed voltage for this regulator, if this | |
47 | * 0 the voltages array is used instead. | |
48 | * @typ_voltages: an array of available typical voltages for | |
49 | * this regulator | |
50 | * @voltages_len: length of the array of available voltages | |
51 | */ | |
52 | struct ab3100_regulator { | |
53 | struct regulator_dev *rdev; | |
fa661258 | 54 | struct device *dev; |
d619bc14 LW |
55 | struct ab3100_platform_data *plfdata; |
56 | u8 regreg; | |
57 | int fixed_voltage; | |
58 | int const *typ_voltages; | |
59 | u8 voltages_len; | |
60 | }; | |
61 | ||
62 | /* The order in which registers are initialized */ | |
63 | static const u8 ab3100_reg_init_order[AB3100_NUM_REGULATORS+2] = { | |
64 | AB3100_LDO_A, | |
65 | AB3100_LDO_C, | |
66 | AB3100_LDO_E, | |
67 | AB3100_LDO_E_SLEEP, | |
68 | AB3100_LDO_F, | |
69 | AB3100_LDO_G, | |
70 | AB3100_LDO_H, | |
71 | AB3100_LDO_K, | |
72 | AB3100_LDO_EXT, | |
73 | AB3100_BUCK, | |
74 | AB3100_BUCK_SLEEP, | |
75 | AB3100_LDO_D, | |
76 | }; | |
77 | ||
78 | /* Preset (hardware defined) voltages for these regulators */ | |
79 | #define LDO_A_VOLTAGE 2750000 | |
80 | #define LDO_C_VOLTAGE 2650000 | |
81 | #define LDO_D_VOLTAGE 2650000 | |
82 | ||
9992ef40 | 83 | static const int ldo_e_buck_typ_voltages[] = { |
d619bc14 LW |
84 | 1800000, |
85 | 1400000, | |
86 | 1300000, | |
87 | 1200000, | |
88 | 1100000, | |
89 | 1050000, | |
90 | 900000, | |
91 | }; | |
92 | ||
9992ef40 | 93 | static const int ldo_f_typ_voltages[] = { |
d619bc14 LW |
94 | 1800000, |
95 | 1400000, | |
96 | 1300000, | |
97 | 1200000, | |
98 | 1100000, | |
99 | 1050000, | |
100 | 2500000, | |
101 | 2650000, | |
102 | }; | |
103 | ||
9992ef40 | 104 | static const int ldo_g_typ_voltages[] = { |
d619bc14 LW |
105 | 2850000, |
106 | 2750000, | |
107 | 1800000, | |
108 | 1500000, | |
109 | }; | |
110 | ||
9992ef40 | 111 | static const int ldo_h_typ_voltages[] = { |
d619bc14 LW |
112 | 2750000, |
113 | 1800000, | |
114 | 1500000, | |
115 | 1200000, | |
116 | }; | |
117 | ||
9992ef40 | 118 | static const int ldo_k_typ_voltages[] = { |
d619bc14 LW |
119 | 2750000, |
120 | 1800000, | |
121 | }; | |
122 | ||
123 | ||
124 | /* The regulator devices */ | |
125 | static struct ab3100_regulator | |
126 | ab3100_regulators[AB3100_NUM_REGULATORS] = { | |
127 | { | |
128 | .regreg = AB3100_LDO_A, | |
129 | .fixed_voltage = LDO_A_VOLTAGE, | |
130 | }, | |
131 | { | |
132 | .regreg = AB3100_LDO_C, | |
133 | .fixed_voltage = LDO_C_VOLTAGE, | |
134 | }, | |
135 | { | |
136 | .regreg = AB3100_LDO_D, | |
137 | .fixed_voltage = LDO_D_VOLTAGE, | |
138 | }, | |
139 | { | |
140 | .regreg = AB3100_LDO_E, | |
141 | .typ_voltages = ldo_e_buck_typ_voltages, | |
142 | .voltages_len = ARRAY_SIZE(ldo_e_buck_typ_voltages), | |
143 | }, | |
144 | { | |
145 | .regreg = AB3100_LDO_F, | |
146 | .typ_voltages = ldo_f_typ_voltages, | |
147 | .voltages_len = ARRAY_SIZE(ldo_f_typ_voltages), | |
148 | }, | |
149 | { | |
150 | .regreg = AB3100_LDO_G, | |
151 | .typ_voltages = ldo_g_typ_voltages, | |
152 | .voltages_len = ARRAY_SIZE(ldo_g_typ_voltages), | |
153 | }, | |
154 | { | |
155 | .regreg = AB3100_LDO_H, | |
156 | .typ_voltages = ldo_h_typ_voltages, | |
157 | .voltages_len = ARRAY_SIZE(ldo_h_typ_voltages), | |
158 | }, | |
159 | { | |
160 | .regreg = AB3100_LDO_K, | |
161 | .typ_voltages = ldo_k_typ_voltages, | |
162 | .voltages_len = ARRAY_SIZE(ldo_k_typ_voltages), | |
163 | }, | |
164 | { | |
165 | .regreg = AB3100_LDO_EXT, | |
166 | /* No voltages for the external regulator */ | |
167 | }, | |
168 | { | |
169 | .regreg = AB3100_BUCK, | |
170 | .typ_voltages = ldo_e_buck_typ_voltages, | |
171 | .voltages_len = ARRAY_SIZE(ldo_e_buck_typ_voltages), | |
172 | }, | |
173 | }; | |
174 | ||
175 | /* | |
176 | * General functions for enable, disable and is_enabled used for | |
177 | * LDO: A,C,E,F,G,H,K,EXT and BUCK | |
178 | */ | |
179 | static int ab3100_enable_regulator(struct regulator_dev *reg) | |
180 | { | |
181 | struct ab3100_regulator *abreg = reg->reg_data; | |
182 | int err; | |
183 | u8 regval; | |
184 | ||
fa661258 | 185 | err = abx500_get_register_interruptible(abreg->dev, 0, abreg->regreg, |
d619bc14 LW |
186 | ®val); |
187 | if (err) { | |
188 | dev_warn(®->dev, "failed to get regid %d value\n", | |
189 | abreg->regreg); | |
190 | return err; | |
191 | } | |
192 | ||
193 | /* The regulator is already on, no reason to go further */ | |
194 | if (regval & AB3100_REG_ON_MASK) | |
195 | return 0; | |
196 | ||
197 | regval |= AB3100_REG_ON_MASK; | |
198 | ||
fa661258 | 199 | err = abx500_set_register_interruptible(abreg->dev, 0, abreg->regreg, |
d619bc14 LW |
200 | regval); |
201 | if (err) { | |
202 | dev_warn(®->dev, "failed to set regid %d value\n", | |
203 | abreg->regreg); | |
204 | return err; | |
205 | } | |
206 | ||
d619bc14 LW |
207 | return 0; |
208 | } | |
209 | ||
210 | static int ab3100_disable_regulator(struct regulator_dev *reg) | |
211 | { | |
212 | struct ab3100_regulator *abreg = reg->reg_data; | |
213 | int err; | |
214 | u8 regval; | |
215 | ||
216 | /* | |
217 | * LDO D is a special regulator. When it is disabled, the entire | |
218 | * system is shut down. So this is handled specially. | |
219 | */ | |
176f45b9 | 220 | pr_info("Called ab3100_disable_regulator\n"); |
d619bc14 | 221 | if (abreg->regreg == AB3100_LDO_D) { |
d619bc14 | 222 | dev_info(®->dev, "disabling LDO D - shut down system\n"); |
d619bc14 | 223 | /* Setting LDO D to 0x00 cuts the power to the SoC */ |
fa661258 | 224 | return abx500_set_register_interruptible(abreg->dev, 0, |
d619bc14 | 225 | AB3100_LDO_D, 0x00U); |
d619bc14 LW |
226 | } |
227 | ||
228 | /* | |
229 | * All other regulators are handled here | |
230 | */ | |
fa661258 | 231 | err = abx500_get_register_interruptible(abreg->dev, 0, abreg->regreg, |
d619bc14 LW |
232 | ®val); |
233 | if (err) { | |
234 | dev_err(®->dev, "unable to get register 0x%x\n", | |
235 | abreg->regreg); | |
236 | return err; | |
237 | } | |
238 | regval &= ~AB3100_REG_ON_MASK; | |
fa661258 | 239 | return abx500_set_register_interruptible(abreg->dev, 0, abreg->regreg, |
d619bc14 LW |
240 | regval); |
241 | } | |
242 | ||
243 | static int ab3100_is_enabled_regulator(struct regulator_dev *reg) | |
244 | { | |
245 | struct ab3100_regulator *abreg = reg->reg_data; | |
246 | u8 regval; | |
247 | int err; | |
248 | ||
fa661258 | 249 | err = abx500_get_register_interruptible(abreg->dev, 0, abreg->regreg, |
d619bc14 LW |
250 | ®val); |
251 | if (err) { | |
252 | dev_err(®->dev, "unable to get register 0x%x\n", | |
253 | abreg->regreg); | |
254 | return err; | |
255 | } | |
256 | ||
257 | return regval & AB3100_REG_ON_MASK; | |
258 | } | |
259 | ||
260 | static int ab3100_list_voltage_regulator(struct regulator_dev *reg, | |
261 | unsigned selector) | |
262 | { | |
263 | struct ab3100_regulator *abreg = reg->reg_data; | |
264 | ||
979da89a | 265 | if (selector >= abreg->voltages_len) |
d619bc14 LW |
266 | return -EINVAL; |
267 | return abreg->typ_voltages[selector]; | |
268 | } | |
269 | ||
270 | static int ab3100_get_voltage_regulator(struct regulator_dev *reg) | |
271 | { | |
272 | struct ab3100_regulator *abreg = reg->reg_data; | |
273 | u8 regval; | |
274 | int err; | |
275 | ||
276 | /* Return the voltage for fixed regulators immediately */ | |
277 | if (abreg->fixed_voltage) | |
278 | return abreg->fixed_voltage; | |
279 | ||
280 | /* | |
281 | * For variable types, read out setting and index into | |
282 | * supplied voltage list. | |
283 | */ | |
fa661258 | 284 | err = abx500_get_register_interruptible(abreg->dev, 0, |
d619bc14 LW |
285 | abreg->regreg, ®val); |
286 | if (err) { | |
287 | dev_warn(®->dev, | |
288 | "failed to get regulator value in register %02x\n", | |
289 | abreg->regreg); | |
290 | return err; | |
291 | } | |
292 | ||
293 | /* The 3 highest bits index voltages */ | |
294 | regval &= 0xE0; | |
295 | regval >>= 5; | |
296 | ||
979da89a | 297 | if (regval >= abreg->voltages_len) { |
d619bc14 LW |
298 | dev_err(®->dev, |
299 | "regulator register %02x contains an illegal voltage setting\n", | |
300 | abreg->regreg); | |
301 | return -EINVAL; | |
302 | } | |
303 | ||
304 | return abreg->typ_voltages[regval]; | |
305 | } | |
306 | ||
1f793ff2 AL |
307 | static int ab3100_set_voltage_regulator_sel(struct regulator_dev *reg, |
308 | unsigned selector) | |
d619bc14 LW |
309 | { |
310 | struct ab3100_regulator *abreg = reg->reg_data; | |
311 | u8 regval; | |
312 | int err; | |
3a93f2a9 | 313 | |
fa661258 | 314 | err = abx500_get_register_interruptible(abreg->dev, 0, |
d619bc14 LW |
315 | abreg->regreg, ®val); |
316 | if (err) { | |
317 | dev_warn(®->dev, | |
318 | "failed to get regulator register %02x\n", | |
319 | abreg->regreg); | |
320 | return err; | |
321 | } | |
322 | ||
323 | /* The highest three bits control the variable regulators */ | |
324 | regval &= ~0xE0; | |
1f793ff2 | 325 | regval |= (selector << 5); |
d619bc14 | 326 | |
fa661258 | 327 | err = abx500_set_register_interruptible(abreg->dev, 0, |
d619bc14 LW |
328 | abreg->regreg, regval); |
329 | if (err) | |
330 | dev_warn(®->dev, "failed to set regulator register %02x\n", | |
331 | abreg->regreg); | |
332 | ||
333 | return err; | |
334 | } | |
335 | ||
336 | static int ab3100_set_suspend_voltage_regulator(struct regulator_dev *reg, | |
337 | int uV) | |
338 | { | |
339 | struct ab3100_regulator *abreg = reg->reg_data; | |
340 | u8 regval; | |
341 | int err; | |
342 | int bestindex; | |
343 | u8 targetreg; | |
344 | ||
345 | if (abreg->regreg == AB3100_LDO_E) | |
346 | targetreg = AB3100_LDO_E_SLEEP; | |
347 | else if (abreg->regreg == AB3100_BUCK) | |
348 | targetreg = AB3100_BUCK_SLEEP; | |
349 | else | |
350 | return -EINVAL; | |
351 | ||
352 | /* LDO E and BUCK have special suspend voltages you can set */ | |
b13296d0 | 353 | bestindex = regulator_map_voltage_iterate(reg, uV, uV); |
d619bc14 | 354 | |
fa661258 | 355 | err = abx500_get_register_interruptible(abreg->dev, 0, |
d619bc14 LW |
356 | targetreg, ®val); |
357 | if (err) { | |
358 | dev_warn(®->dev, | |
359 | "failed to get regulator register %02x\n", | |
360 | targetreg); | |
361 | return err; | |
362 | } | |
363 | ||
364 | /* The highest three bits control the variable regulators */ | |
365 | regval &= ~0xE0; | |
366 | regval |= (bestindex << 5); | |
367 | ||
fa661258 | 368 | err = abx500_set_register_interruptible(abreg->dev, 0, |
d619bc14 LW |
369 | targetreg, regval); |
370 | if (err) | |
371 | dev_warn(®->dev, "failed to set regulator register %02x\n", | |
372 | abreg->regreg); | |
373 | ||
374 | return err; | |
375 | } | |
376 | ||
377 | /* | |
378 | * The external regulator can just define a fixed voltage. | |
379 | */ | |
380 | static int ab3100_get_voltage_regulator_external(struct regulator_dev *reg) | |
381 | { | |
382 | struct ab3100_regulator *abreg = reg->reg_data; | |
383 | ||
384 | return abreg->plfdata->external_voltage; | |
385 | } | |
386 | ||
19c98825 LW |
387 | static int ab3100_enable_time_regulator(struct regulator_dev *reg) |
388 | { | |
389 | struct ab3100_regulator *abreg = reg->reg_data; | |
390 | ||
391 | /* Per-regulator power on delay from spec */ | |
392 | switch (abreg->regreg) { | |
393 | case AB3100_LDO_A: /* Fallthrough */ | |
394 | case AB3100_LDO_C: /* Fallthrough */ | |
395 | case AB3100_LDO_D: /* Fallthrough */ | |
396 | case AB3100_LDO_E: /* Fallthrough */ | |
397 | case AB3100_LDO_H: /* Fallthrough */ | |
398 | case AB3100_LDO_K: | |
399 | return 200; | |
400 | case AB3100_LDO_F: | |
401 | return 600; | |
402 | case AB3100_LDO_G: | |
403 | return 400; | |
404 | case AB3100_BUCK: | |
405 | return 1000; | |
406 | default: | |
407 | break; | |
408 | } | |
409 | return 0; | |
410 | } | |
411 | ||
d619bc14 LW |
412 | static struct regulator_ops regulator_ops_fixed = { |
413 | .enable = ab3100_enable_regulator, | |
414 | .disable = ab3100_disable_regulator, | |
415 | .is_enabled = ab3100_is_enabled_regulator, | |
416 | .get_voltage = ab3100_get_voltage_regulator, | |
19c98825 | 417 | .enable_time = ab3100_enable_time_regulator, |
d619bc14 LW |
418 | }; |
419 | ||
420 | static struct regulator_ops regulator_ops_variable = { | |
421 | .enable = ab3100_enable_regulator, | |
422 | .disable = ab3100_disable_regulator, | |
423 | .is_enabled = ab3100_is_enabled_regulator, | |
424 | .get_voltage = ab3100_get_voltage_regulator, | |
1f793ff2 | 425 | .set_voltage_sel = ab3100_set_voltage_regulator_sel, |
d619bc14 | 426 | .list_voltage = ab3100_list_voltage_regulator, |
19c98825 | 427 | .enable_time = ab3100_enable_time_regulator, |
d619bc14 LW |
428 | }; |
429 | ||
430 | static struct regulator_ops regulator_ops_variable_sleepable = { | |
431 | .enable = ab3100_enable_regulator, | |
432 | .disable = ab3100_disable_regulator, | |
433 | .is_enabled = ab3100_is_enabled_regulator, | |
434 | .get_voltage = ab3100_get_voltage_regulator, | |
1f793ff2 | 435 | .set_voltage_sel = ab3100_set_voltage_regulator_sel, |
d619bc14 LW |
436 | .set_suspend_voltage = ab3100_set_suspend_voltage_regulator, |
437 | .list_voltage = ab3100_list_voltage_regulator, | |
19c98825 | 438 | .enable_time = ab3100_enable_time_regulator, |
d619bc14 LW |
439 | }; |
440 | ||
441 | /* | |
442 | * LDO EXT is an external regulator so it is really | |
443 | * not possible to set any voltage locally here, AB3100 | |
444 | * is an on/off switch plain an simple. The external | |
445 | * voltage is defined in the board set-up if any. | |
446 | */ | |
447 | static struct regulator_ops regulator_ops_external = { | |
448 | .enable = ab3100_enable_regulator, | |
449 | .disable = ab3100_disable_regulator, | |
450 | .is_enabled = ab3100_is_enabled_regulator, | |
451 | .get_voltage = ab3100_get_voltage_regulator_external, | |
452 | }; | |
453 | ||
454 | static struct regulator_desc | |
455 | ab3100_regulator_desc[AB3100_NUM_REGULATORS] = { | |
456 | { | |
457 | .name = "LDO_A", | |
458 | .id = AB3100_LDO_A, | |
459 | .ops = ®ulator_ops_fixed, | |
460 | .type = REGULATOR_VOLTAGE, | |
64714354 | 461 | .owner = THIS_MODULE, |
d619bc14 LW |
462 | }, |
463 | { | |
464 | .name = "LDO_C", | |
465 | .id = AB3100_LDO_C, | |
466 | .ops = ®ulator_ops_fixed, | |
467 | .type = REGULATOR_VOLTAGE, | |
64714354 | 468 | .owner = THIS_MODULE, |
d619bc14 LW |
469 | }, |
470 | { | |
471 | .name = "LDO_D", | |
472 | .id = AB3100_LDO_D, | |
473 | .ops = ®ulator_ops_fixed, | |
474 | .type = REGULATOR_VOLTAGE, | |
64714354 | 475 | .owner = THIS_MODULE, |
d619bc14 LW |
476 | }, |
477 | { | |
478 | .name = "LDO_E", | |
479 | .id = AB3100_LDO_E, | |
480 | .ops = ®ulator_ops_variable_sleepable, | |
75f2ba8f | 481 | .n_voltages = ARRAY_SIZE(ldo_e_buck_typ_voltages), |
d619bc14 | 482 | .type = REGULATOR_VOLTAGE, |
64714354 | 483 | .owner = THIS_MODULE, |
d619bc14 LW |
484 | }, |
485 | { | |
486 | .name = "LDO_F", | |
487 | .id = AB3100_LDO_F, | |
488 | .ops = ®ulator_ops_variable, | |
75f2ba8f | 489 | .n_voltages = ARRAY_SIZE(ldo_f_typ_voltages), |
d619bc14 | 490 | .type = REGULATOR_VOLTAGE, |
64714354 | 491 | .owner = THIS_MODULE, |
d619bc14 LW |
492 | }, |
493 | { | |
494 | .name = "LDO_G", | |
495 | .id = AB3100_LDO_G, | |
496 | .ops = ®ulator_ops_variable, | |
75f2ba8f | 497 | .n_voltages = ARRAY_SIZE(ldo_g_typ_voltages), |
d619bc14 | 498 | .type = REGULATOR_VOLTAGE, |
64714354 | 499 | .owner = THIS_MODULE, |
d619bc14 LW |
500 | }, |
501 | { | |
502 | .name = "LDO_H", | |
503 | .id = AB3100_LDO_H, | |
504 | .ops = ®ulator_ops_variable, | |
75f2ba8f | 505 | .n_voltages = ARRAY_SIZE(ldo_h_typ_voltages), |
d619bc14 | 506 | .type = REGULATOR_VOLTAGE, |
64714354 | 507 | .owner = THIS_MODULE, |
d619bc14 LW |
508 | }, |
509 | { | |
510 | .name = "LDO_K", | |
511 | .id = AB3100_LDO_K, | |
512 | .ops = ®ulator_ops_variable, | |
75f2ba8f | 513 | .n_voltages = ARRAY_SIZE(ldo_k_typ_voltages), |
d619bc14 | 514 | .type = REGULATOR_VOLTAGE, |
64714354 | 515 | .owner = THIS_MODULE, |
d619bc14 LW |
516 | }, |
517 | { | |
518 | .name = "LDO_EXT", | |
519 | .id = AB3100_LDO_EXT, | |
520 | .ops = ®ulator_ops_external, | |
521 | .type = REGULATOR_VOLTAGE, | |
64714354 | 522 | .owner = THIS_MODULE, |
d619bc14 LW |
523 | }, |
524 | { | |
525 | .name = "BUCK", | |
526 | .id = AB3100_BUCK, | |
527 | .ops = ®ulator_ops_variable_sleepable, | |
75f2ba8f | 528 | .n_voltages = ARRAY_SIZE(ldo_e_buck_typ_voltages), |
d619bc14 | 529 | .type = REGULATOR_VOLTAGE, |
64714354 | 530 | .owner = THIS_MODULE, |
d619bc14 LW |
531 | }, |
532 | }; | |
533 | ||
534 | /* | |
535 | * NOTE: the following functions are regulators pluralis - it is the | |
536 | * binding to the AB3100 core driver and the parent platform device | |
537 | * for all the different regulators. | |
538 | */ | |
539 | ||
98bf7c05 | 540 | static int __devinit ab3100_regulators_probe(struct platform_device *pdev) |
d619bc14 | 541 | { |
a771e36e | 542 | struct ab3100_platform_data *plfdata = pdev->dev.platform_data; |
c172708d | 543 | struct regulator_config config = { }; |
d619bc14 LW |
544 | int err = 0; |
545 | u8 data; | |
546 | int i; | |
547 | ||
548 | /* Check chip state */ | |
fa661258 | 549 | err = abx500_get_register_interruptible(&pdev->dev, 0, |
d619bc14 LW |
550 | AB3100_LDO_D, &data); |
551 | if (err) { | |
552 | dev_err(&pdev->dev, "could not read initial status of LDO_D\n"); | |
553 | return err; | |
554 | } | |
555 | if (data & 0x10) | |
556 | dev_notice(&pdev->dev, | |
557 | "chip is already in active mode (Warm start)\n"); | |
558 | else | |
559 | dev_notice(&pdev->dev, | |
560 | "chip is in inactive mode (Cold start)\n"); | |
561 | ||
562 | /* Set up regulators */ | |
563 | for (i = 0; i < ARRAY_SIZE(ab3100_reg_init_order); i++) { | |
fa661258 | 564 | err = abx500_set_register_interruptible(&pdev->dev, 0, |
d619bc14 LW |
565 | ab3100_reg_init_order[i], |
566 | plfdata->reg_initvals[i]); | |
567 | if (err) { | |
568 | dev_err(&pdev->dev, "regulator initialization failed with error %d\n", | |
569 | err); | |
570 | return err; | |
571 | } | |
572 | } | |
573 | ||
d619bc14 LW |
574 | /* Register the regulators */ |
575 | for (i = 0; i < AB3100_NUM_REGULATORS; i++) { | |
576 | struct ab3100_regulator *reg = &ab3100_regulators[i]; | |
577 | struct regulator_dev *rdev; | |
578 | ||
579 | /* | |
580 | * Initialize per-regulator struct. | |
581 | * Inherit platform data, this comes down from the | |
582 | * i2c boarddata, from the machine. So if you want to | |
583 | * see what it looks like for a certain machine, go | |
584 | * into the machine I2C setup. | |
585 | */ | |
fa661258 | 586 | reg->dev = &pdev->dev; |
d619bc14 LW |
587 | reg->plfdata = plfdata; |
588 | ||
c172708d MB |
589 | config.dev = &pdev->dev; |
590 | config.driver_data = reg; | |
591 | config.init_data = &plfdata->reg_constraints[i]; | |
592 | ||
d619bc14 LW |
593 | /* |
594 | * Register the regulator, pass around | |
595 | * the ab3100_regulator struct | |
596 | */ | |
c172708d | 597 | rdev = regulator_register(&ab3100_regulator_desc[i], &config); |
d619bc14 LW |
598 | if (IS_ERR(rdev)) { |
599 | err = PTR_ERR(rdev); | |
600 | dev_err(&pdev->dev, | |
601 | "%s: failed to register regulator %s err %d\n", | |
602 | __func__, ab3100_regulator_desc[i].name, | |
603 | err); | |
d619bc14 | 604 | /* remove the already registered regulators */ |
b3fcf3e5 | 605 | while (--i >= 0) |
d619bc14 | 606 | regulator_unregister(ab3100_regulators[i].rdev); |
d619bc14 LW |
607 | return err; |
608 | } | |
609 | ||
610 | /* Then set a pointer back to the registered regulator */ | |
611 | reg->rdev = rdev; | |
612 | } | |
613 | ||
614 | return 0; | |
615 | } | |
616 | ||
98bf7c05 | 617 | static int __devexit ab3100_regulators_remove(struct platform_device *pdev) |
d619bc14 LW |
618 | { |
619 | int i; | |
620 | ||
621 | for (i = 0; i < AB3100_NUM_REGULATORS; i++) { | |
622 | struct ab3100_regulator *reg = &ab3100_regulators[i]; | |
623 | ||
624 | regulator_unregister(reg->rdev); | |
625 | } | |
626 | return 0; | |
627 | } | |
628 | ||
629 | static struct platform_driver ab3100_regulators_driver = { | |
630 | .driver = { | |
631 | .name = "ab3100-regulators", | |
632 | .owner = THIS_MODULE, | |
633 | }, | |
634 | .probe = ab3100_regulators_probe, | |
98bf7c05 | 635 | .remove = __devexit_p(ab3100_regulators_remove), |
d619bc14 LW |
636 | }; |
637 | ||
638 | static __init int ab3100_regulators_init(void) | |
639 | { | |
640 | return platform_driver_register(&ab3100_regulators_driver); | |
641 | } | |
642 | ||
643 | static __exit void ab3100_regulators_exit(void) | |
644 | { | |
176f45b9 | 645 | platform_driver_unregister(&ab3100_regulators_driver); |
d619bc14 LW |
646 | } |
647 | ||
648 | subsys_initcall(ab3100_regulators_init); | |
649 | module_exit(ab3100_regulators_exit); | |
650 | ||
651 | MODULE_AUTHOR("Mattias Wallin <mattias.wallin@stericsson.com>"); | |
652 | MODULE_DESCRIPTION("AB3100 Regulator driver"); | |
653 | MODULE_LICENSE("GPL"); | |
654 | MODULE_ALIAS("platform:ab3100-regulators"); |