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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> | |
0fd0013c | 18 | #include <linux/mfd/ab3100.h> |
812f9e9d | 19 | #include <linux/mfd/abx500.h> |
8735bc2f LW |
20 | #include <linux/of.h> |
21 | #include <linux/regulator/of_regulator.h> | |
d619bc14 LW |
22 | |
23 | /* LDO registers and some handy masking definitions for AB3100 */ | |
24 | #define AB3100_LDO_A 0x40 | |
25 | #define AB3100_LDO_C 0x41 | |
26 | #define AB3100_LDO_D 0x42 | |
27 | #define AB3100_LDO_E 0x43 | |
28 | #define AB3100_LDO_E_SLEEP 0x44 | |
29 | #define AB3100_LDO_F 0x45 | |
30 | #define AB3100_LDO_G 0x46 | |
31 | #define AB3100_LDO_H 0x47 | |
32 | #define AB3100_LDO_H_SLEEP_MODE 0 | |
33 | #define AB3100_LDO_H_SLEEP_EN 2 | |
34 | #define AB3100_LDO_ON 4 | |
35 | #define AB3100_LDO_H_VSEL_AC 5 | |
36 | #define AB3100_LDO_K 0x48 | |
37 | #define AB3100_LDO_EXT 0x49 | |
38 | #define AB3100_BUCK 0x4A | |
39 | #define AB3100_BUCK_SLEEP 0x4B | |
40 | #define AB3100_REG_ON_MASK 0x10 | |
41 | ||
42 | /** | |
43 | * struct ab3100_regulator | |
44 | * A struct passed around the individual regulator functions | |
45 | * @platform_device: platform device holding this regulator | |
fa661258 | 46 | * @dev: handle to the device |
d619bc14 LW |
47 | * @plfdata: AB3100 platform data passed in at probe time |
48 | * @regreg: regulator register number in the AB3100 | |
d619bc14 LW |
49 | */ |
50 | struct ab3100_regulator { | |
51 | struct regulator_dev *rdev; | |
fa661258 | 52 | struct device *dev; |
d619bc14 LW |
53 | struct ab3100_platform_data *plfdata; |
54 | u8 regreg; | |
d619bc14 LW |
55 | }; |
56 | ||
57 | /* The order in which registers are initialized */ | |
58 | static const u8 ab3100_reg_init_order[AB3100_NUM_REGULATORS+2] = { | |
59 | AB3100_LDO_A, | |
60 | AB3100_LDO_C, | |
61 | AB3100_LDO_E, | |
62 | AB3100_LDO_E_SLEEP, | |
63 | AB3100_LDO_F, | |
64 | AB3100_LDO_G, | |
65 | AB3100_LDO_H, | |
66 | AB3100_LDO_K, | |
67 | AB3100_LDO_EXT, | |
68 | AB3100_BUCK, | |
69 | AB3100_BUCK_SLEEP, | |
70 | AB3100_LDO_D, | |
71 | }; | |
72 | ||
73 | /* Preset (hardware defined) voltages for these regulators */ | |
74 | #define LDO_A_VOLTAGE 2750000 | |
75 | #define LDO_C_VOLTAGE 2650000 | |
76 | #define LDO_D_VOLTAGE 2650000 | |
77 | ||
a3beb742 | 78 | static const unsigned int ldo_e_buck_typ_voltages[] = { |
d619bc14 LW |
79 | 1800000, |
80 | 1400000, | |
81 | 1300000, | |
82 | 1200000, | |
83 | 1100000, | |
84 | 1050000, | |
85 | 900000, | |
86 | }; | |
87 | ||
a3beb742 | 88 | static const unsigned int ldo_f_typ_voltages[] = { |
d619bc14 LW |
89 | 1800000, |
90 | 1400000, | |
91 | 1300000, | |
92 | 1200000, | |
93 | 1100000, | |
94 | 1050000, | |
95 | 2500000, | |
96 | 2650000, | |
97 | }; | |
98 | ||
a3beb742 | 99 | static const unsigned int ldo_g_typ_voltages[] = { |
d619bc14 LW |
100 | 2850000, |
101 | 2750000, | |
102 | 1800000, | |
103 | 1500000, | |
104 | }; | |
105 | ||
a3beb742 | 106 | static const unsigned int ldo_h_typ_voltages[] = { |
d619bc14 LW |
107 | 2750000, |
108 | 1800000, | |
109 | 1500000, | |
110 | 1200000, | |
111 | }; | |
112 | ||
a3beb742 | 113 | static const unsigned int ldo_k_typ_voltages[] = { |
d619bc14 LW |
114 | 2750000, |
115 | 1800000, | |
116 | }; | |
117 | ||
118 | ||
119 | /* The regulator devices */ | |
120 | static struct ab3100_regulator | |
121 | ab3100_regulators[AB3100_NUM_REGULATORS] = { | |
122 | { | |
123 | .regreg = AB3100_LDO_A, | |
d619bc14 LW |
124 | }, |
125 | { | |
126 | .regreg = AB3100_LDO_C, | |
d619bc14 LW |
127 | }, |
128 | { | |
129 | .regreg = AB3100_LDO_D, | |
d619bc14 LW |
130 | }, |
131 | { | |
132 | .regreg = AB3100_LDO_E, | |
d619bc14 LW |
133 | }, |
134 | { | |
135 | .regreg = AB3100_LDO_F, | |
d619bc14 LW |
136 | }, |
137 | { | |
138 | .regreg = AB3100_LDO_G, | |
d619bc14 LW |
139 | }, |
140 | { | |
141 | .regreg = AB3100_LDO_H, | |
d619bc14 LW |
142 | }, |
143 | { | |
144 | .regreg = AB3100_LDO_K, | |
d619bc14 LW |
145 | }, |
146 | { | |
147 | .regreg = AB3100_LDO_EXT, | |
148 | /* No voltages for the external regulator */ | |
149 | }, | |
150 | { | |
151 | .regreg = AB3100_BUCK, | |
d619bc14 LW |
152 | }, |
153 | }; | |
154 | ||
155 | /* | |
156 | * General functions for enable, disable and is_enabled used for | |
157 | * LDO: A,C,E,F,G,H,K,EXT and BUCK | |
158 | */ | |
159 | static int ab3100_enable_regulator(struct regulator_dev *reg) | |
160 | { | |
6c3b956b | 161 | struct ab3100_regulator *abreg = rdev_get_drvdata(reg); |
d619bc14 LW |
162 | int err; |
163 | u8 regval; | |
164 | ||
fa661258 | 165 | err = abx500_get_register_interruptible(abreg->dev, 0, abreg->regreg, |
d619bc14 LW |
166 | ®val); |
167 | if (err) { | |
168 | dev_warn(®->dev, "failed to get regid %d value\n", | |
169 | abreg->regreg); | |
170 | return err; | |
171 | } | |
172 | ||
173 | /* The regulator is already on, no reason to go further */ | |
174 | if (regval & AB3100_REG_ON_MASK) | |
175 | return 0; | |
176 | ||
177 | regval |= AB3100_REG_ON_MASK; | |
178 | ||
fa661258 | 179 | err = abx500_set_register_interruptible(abreg->dev, 0, abreg->regreg, |
d619bc14 LW |
180 | regval); |
181 | if (err) { | |
182 | dev_warn(®->dev, "failed to set regid %d value\n", | |
183 | abreg->regreg); | |
184 | return err; | |
185 | } | |
186 | ||
d619bc14 LW |
187 | return 0; |
188 | } | |
189 | ||
190 | static int ab3100_disable_regulator(struct regulator_dev *reg) | |
191 | { | |
6c3b956b | 192 | struct ab3100_regulator *abreg = rdev_get_drvdata(reg); |
d619bc14 LW |
193 | int err; |
194 | u8 regval; | |
195 | ||
196 | /* | |
197 | * LDO D is a special regulator. When it is disabled, the entire | |
198 | * system is shut down. So this is handled specially. | |
199 | */ | |
176f45b9 | 200 | pr_info("Called ab3100_disable_regulator\n"); |
d619bc14 | 201 | if (abreg->regreg == AB3100_LDO_D) { |
d619bc14 | 202 | dev_info(®->dev, "disabling LDO D - shut down system\n"); |
d619bc14 | 203 | /* Setting LDO D to 0x00 cuts the power to the SoC */ |
fa661258 | 204 | return abx500_set_register_interruptible(abreg->dev, 0, |
d619bc14 | 205 | AB3100_LDO_D, 0x00U); |
d619bc14 LW |
206 | } |
207 | ||
208 | /* | |
209 | * All other regulators are handled here | |
210 | */ | |
fa661258 | 211 | err = abx500_get_register_interruptible(abreg->dev, 0, abreg->regreg, |
d619bc14 LW |
212 | ®val); |
213 | if (err) { | |
214 | dev_err(®->dev, "unable to get register 0x%x\n", | |
215 | abreg->regreg); | |
216 | return err; | |
217 | } | |
218 | regval &= ~AB3100_REG_ON_MASK; | |
fa661258 | 219 | return abx500_set_register_interruptible(abreg->dev, 0, abreg->regreg, |
d619bc14 LW |
220 | regval); |
221 | } | |
222 | ||
223 | static int ab3100_is_enabled_regulator(struct regulator_dev *reg) | |
224 | { | |
6c3b956b | 225 | struct ab3100_regulator *abreg = rdev_get_drvdata(reg); |
d619bc14 LW |
226 | u8 regval; |
227 | int err; | |
228 | ||
fa661258 | 229 | err = abx500_get_register_interruptible(abreg->dev, 0, abreg->regreg, |
d619bc14 LW |
230 | ®val); |
231 | if (err) { | |
232 | dev_err(®->dev, "unable to get register 0x%x\n", | |
233 | abreg->regreg); | |
234 | return err; | |
235 | } | |
236 | ||
237 | return regval & AB3100_REG_ON_MASK; | |
238 | } | |
239 | ||
d619bc14 LW |
240 | static int ab3100_get_voltage_regulator(struct regulator_dev *reg) |
241 | { | |
6c3b956b | 242 | struct ab3100_regulator *abreg = rdev_get_drvdata(reg); |
d619bc14 LW |
243 | u8 regval; |
244 | int err; | |
245 | ||
d619bc14 LW |
246 | /* |
247 | * For variable types, read out setting and index into | |
248 | * supplied voltage list. | |
249 | */ | |
fa661258 | 250 | err = abx500_get_register_interruptible(abreg->dev, 0, |
d619bc14 LW |
251 | abreg->regreg, ®val); |
252 | if (err) { | |
253 | dev_warn(®->dev, | |
254 | "failed to get regulator value in register %02x\n", | |
255 | abreg->regreg); | |
256 | return err; | |
257 | } | |
258 | ||
259 | /* The 3 highest bits index voltages */ | |
260 | regval &= 0xE0; | |
261 | regval >>= 5; | |
262 | ||
a3beb742 | 263 | if (regval >= reg->desc->n_voltages) { |
d619bc14 LW |
264 | dev_err(®->dev, |
265 | "regulator register %02x contains an illegal voltage setting\n", | |
266 | abreg->regreg); | |
267 | return -EINVAL; | |
268 | } | |
269 | ||
a3beb742 | 270 | return reg->desc->volt_table[regval]; |
d619bc14 LW |
271 | } |
272 | ||
1f793ff2 AL |
273 | static int ab3100_set_voltage_regulator_sel(struct regulator_dev *reg, |
274 | unsigned selector) | |
d619bc14 | 275 | { |
6c3b956b | 276 | struct ab3100_regulator *abreg = rdev_get_drvdata(reg); |
d619bc14 LW |
277 | u8 regval; |
278 | int err; | |
3a93f2a9 | 279 | |
fa661258 | 280 | err = abx500_get_register_interruptible(abreg->dev, 0, |
d619bc14 LW |
281 | abreg->regreg, ®val); |
282 | if (err) { | |
283 | dev_warn(®->dev, | |
284 | "failed to get regulator register %02x\n", | |
285 | abreg->regreg); | |
286 | return err; | |
287 | } | |
288 | ||
289 | /* The highest three bits control the variable regulators */ | |
290 | regval &= ~0xE0; | |
1f793ff2 | 291 | regval |= (selector << 5); |
d619bc14 | 292 | |
fa661258 | 293 | err = abx500_set_register_interruptible(abreg->dev, 0, |
d619bc14 LW |
294 | abreg->regreg, regval); |
295 | if (err) | |
296 | dev_warn(®->dev, "failed to set regulator register %02x\n", | |
297 | abreg->regreg); | |
298 | ||
299 | return err; | |
300 | } | |
301 | ||
302 | static int ab3100_set_suspend_voltage_regulator(struct regulator_dev *reg, | |
303 | int uV) | |
304 | { | |
6c3b956b | 305 | struct ab3100_regulator *abreg = rdev_get_drvdata(reg); |
d619bc14 LW |
306 | u8 regval; |
307 | int err; | |
308 | int bestindex; | |
309 | u8 targetreg; | |
310 | ||
311 | if (abreg->regreg == AB3100_LDO_E) | |
312 | targetreg = AB3100_LDO_E_SLEEP; | |
313 | else if (abreg->regreg == AB3100_BUCK) | |
314 | targetreg = AB3100_BUCK_SLEEP; | |
315 | else | |
316 | return -EINVAL; | |
317 | ||
318 | /* LDO E and BUCK have special suspend voltages you can set */ | |
b13296d0 | 319 | bestindex = regulator_map_voltage_iterate(reg, uV, uV); |
d619bc14 | 320 | |
fa661258 | 321 | err = abx500_get_register_interruptible(abreg->dev, 0, |
d619bc14 LW |
322 | targetreg, ®val); |
323 | if (err) { | |
324 | dev_warn(®->dev, | |
325 | "failed to get regulator register %02x\n", | |
326 | targetreg); | |
327 | return err; | |
328 | } | |
329 | ||
330 | /* The highest three bits control the variable regulators */ | |
331 | regval &= ~0xE0; | |
332 | regval |= (bestindex << 5); | |
333 | ||
fa661258 | 334 | err = abx500_set_register_interruptible(abreg->dev, 0, |
d619bc14 LW |
335 | targetreg, regval); |
336 | if (err) | |
337 | dev_warn(®->dev, "failed to set regulator register %02x\n", | |
338 | abreg->regreg); | |
339 | ||
340 | return err; | |
341 | } | |
342 | ||
343 | /* | |
344 | * The external regulator can just define a fixed voltage. | |
345 | */ | |
346 | static int ab3100_get_voltage_regulator_external(struct regulator_dev *reg) | |
347 | { | |
6c3b956b | 348 | struct ab3100_regulator *abreg = rdev_get_drvdata(reg); |
d619bc14 | 349 | |
8735bc2f LW |
350 | if (abreg->plfdata) |
351 | return abreg->plfdata->external_voltage; | |
352 | else | |
353 | /* TODO: encode external voltage into device tree */ | |
354 | return 0; | |
d619bc14 LW |
355 | } |
356 | ||
357 | static struct regulator_ops regulator_ops_fixed = { | |
1bd1955a | 358 | .list_voltage = regulator_list_voltage_linear, |
d619bc14 LW |
359 | .enable = ab3100_enable_regulator, |
360 | .disable = ab3100_disable_regulator, | |
361 | .is_enabled = ab3100_is_enabled_regulator, | |
d619bc14 LW |
362 | }; |
363 | ||
364 | static struct regulator_ops regulator_ops_variable = { | |
365 | .enable = ab3100_enable_regulator, | |
366 | .disable = ab3100_disable_regulator, | |
367 | .is_enabled = ab3100_is_enabled_regulator, | |
368 | .get_voltage = ab3100_get_voltage_regulator, | |
1f793ff2 | 369 | .set_voltage_sel = ab3100_set_voltage_regulator_sel, |
a3beb742 | 370 | .list_voltage = regulator_list_voltage_table, |
d619bc14 LW |
371 | }; |
372 | ||
373 | static struct regulator_ops regulator_ops_variable_sleepable = { | |
374 | .enable = ab3100_enable_regulator, | |
375 | .disable = ab3100_disable_regulator, | |
376 | .is_enabled = ab3100_is_enabled_regulator, | |
377 | .get_voltage = ab3100_get_voltage_regulator, | |
1f793ff2 | 378 | .set_voltage_sel = ab3100_set_voltage_regulator_sel, |
d619bc14 | 379 | .set_suspend_voltage = ab3100_set_suspend_voltage_regulator, |
a3beb742 | 380 | .list_voltage = regulator_list_voltage_table, |
d619bc14 LW |
381 | }; |
382 | ||
383 | /* | |
384 | * LDO EXT is an external regulator so it is really | |
385 | * not possible to set any voltage locally here, AB3100 | |
386 | * is an on/off switch plain an simple. The external | |
387 | * voltage is defined in the board set-up if any. | |
388 | */ | |
389 | static struct regulator_ops regulator_ops_external = { | |
390 | .enable = ab3100_enable_regulator, | |
391 | .disable = ab3100_disable_regulator, | |
392 | .is_enabled = ab3100_is_enabled_regulator, | |
393 | .get_voltage = ab3100_get_voltage_regulator_external, | |
394 | }; | |
395 | ||
396 | static struct regulator_desc | |
397 | ab3100_regulator_desc[AB3100_NUM_REGULATORS] = { | |
398 | { | |
399 | .name = "LDO_A", | |
400 | .id = AB3100_LDO_A, | |
401 | .ops = ®ulator_ops_fixed, | |
1bd1955a | 402 | .n_voltages = 1, |
d619bc14 | 403 | .type = REGULATOR_VOLTAGE, |
64714354 | 404 | .owner = THIS_MODULE, |
1bd1955a | 405 | .min_uV = LDO_A_VOLTAGE, |
f8568cbd | 406 | .enable_time = 200, |
d619bc14 LW |
407 | }, |
408 | { | |
409 | .name = "LDO_C", | |
410 | .id = AB3100_LDO_C, | |
411 | .ops = ®ulator_ops_fixed, | |
1bd1955a | 412 | .n_voltages = 1, |
d619bc14 | 413 | .type = REGULATOR_VOLTAGE, |
64714354 | 414 | .owner = THIS_MODULE, |
1bd1955a | 415 | .min_uV = LDO_C_VOLTAGE, |
f8568cbd | 416 | .enable_time = 200, |
d619bc14 LW |
417 | }, |
418 | { | |
419 | .name = "LDO_D", | |
420 | .id = AB3100_LDO_D, | |
421 | .ops = ®ulator_ops_fixed, | |
1bd1955a | 422 | .n_voltages = 1, |
d619bc14 | 423 | .type = REGULATOR_VOLTAGE, |
64714354 | 424 | .owner = THIS_MODULE, |
1bd1955a | 425 | .min_uV = LDO_D_VOLTAGE, |
f8568cbd | 426 | .enable_time = 200, |
d619bc14 LW |
427 | }, |
428 | { | |
429 | .name = "LDO_E", | |
430 | .id = AB3100_LDO_E, | |
431 | .ops = ®ulator_ops_variable_sleepable, | |
75f2ba8f | 432 | .n_voltages = ARRAY_SIZE(ldo_e_buck_typ_voltages), |
a3beb742 | 433 | .volt_table = ldo_e_buck_typ_voltages, |
d619bc14 | 434 | .type = REGULATOR_VOLTAGE, |
64714354 | 435 | .owner = THIS_MODULE, |
f8568cbd | 436 | .enable_time = 200, |
d619bc14 LW |
437 | }, |
438 | { | |
439 | .name = "LDO_F", | |
440 | .id = AB3100_LDO_F, | |
441 | .ops = ®ulator_ops_variable, | |
75f2ba8f | 442 | .n_voltages = ARRAY_SIZE(ldo_f_typ_voltages), |
a3beb742 | 443 | .volt_table = ldo_f_typ_voltages, |
d619bc14 | 444 | .type = REGULATOR_VOLTAGE, |
64714354 | 445 | .owner = THIS_MODULE, |
f8568cbd | 446 | .enable_time = 600, |
d619bc14 LW |
447 | }, |
448 | { | |
449 | .name = "LDO_G", | |
450 | .id = AB3100_LDO_G, | |
451 | .ops = ®ulator_ops_variable, | |
75f2ba8f | 452 | .n_voltages = ARRAY_SIZE(ldo_g_typ_voltages), |
a3beb742 | 453 | .volt_table = ldo_g_typ_voltages, |
d619bc14 | 454 | .type = REGULATOR_VOLTAGE, |
64714354 | 455 | .owner = THIS_MODULE, |
f8568cbd | 456 | .enable_time = 400, |
d619bc14 LW |
457 | }, |
458 | { | |
459 | .name = "LDO_H", | |
460 | .id = AB3100_LDO_H, | |
461 | .ops = ®ulator_ops_variable, | |
75f2ba8f | 462 | .n_voltages = ARRAY_SIZE(ldo_h_typ_voltages), |
a3beb742 | 463 | .volt_table = ldo_h_typ_voltages, |
d619bc14 | 464 | .type = REGULATOR_VOLTAGE, |
64714354 | 465 | .owner = THIS_MODULE, |
f8568cbd | 466 | .enable_time = 200, |
d619bc14 LW |
467 | }, |
468 | { | |
469 | .name = "LDO_K", | |
470 | .id = AB3100_LDO_K, | |
471 | .ops = ®ulator_ops_variable, | |
75f2ba8f | 472 | .n_voltages = ARRAY_SIZE(ldo_k_typ_voltages), |
a3beb742 | 473 | .volt_table = ldo_k_typ_voltages, |
d619bc14 | 474 | .type = REGULATOR_VOLTAGE, |
64714354 | 475 | .owner = THIS_MODULE, |
f8568cbd | 476 | .enable_time = 200, |
d619bc14 LW |
477 | }, |
478 | { | |
479 | .name = "LDO_EXT", | |
480 | .id = AB3100_LDO_EXT, | |
481 | .ops = ®ulator_ops_external, | |
482 | .type = REGULATOR_VOLTAGE, | |
64714354 | 483 | .owner = THIS_MODULE, |
d619bc14 LW |
484 | }, |
485 | { | |
486 | .name = "BUCK", | |
487 | .id = AB3100_BUCK, | |
488 | .ops = ®ulator_ops_variable_sleepable, | |
75f2ba8f | 489 | .n_voltages = ARRAY_SIZE(ldo_e_buck_typ_voltages), |
cfa9cfbc | 490 | .volt_table = ldo_e_buck_typ_voltages, |
d619bc14 | 491 | .type = REGULATOR_VOLTAGE, |
64714354 | 492 | .owner = THIS_MODULE, |
f8568cbd | 493 | .enable_time = 1000, |
d619bc14 LW |
494 | }, |
495 | }; | |
496 | ||
9b318353 LW |
497 | static int ab3100_regulator_register(struct platform_device *pdev, |
498 | struct ab3100_platform_data *plfdata, | |
8735bc2f LW |
499 | struct regulator_init_data *init_data, |
500 | struct device_node *np, | |
23e21ddf | 501 | unsigned long id) |
9b318353 LW |
502 | { |
503 | struct regulator_desc *desc; | |
504 | struct ab3100_regulator *reg; | |
505 | struct regulator_dev *rdev; | |
506 | struct regulator_config config = { }; | |
507 | int err, i; | |
508 | ||
509 | for (i = 0; i < AB3100_NUM_REGULATORS; i++) { | |
510 | desc = &ab3100_regulator_desc[i]; | |
511 | if (desc->id == id) | |
512 | break; | |
513 | } | |
514 | if (desc->id != id) | |
515 | return -ENODEV; | |
516 | ||
517 | /* Same index used for this array */ | |
518 | reg = &ab3100_regulators[i]; | |
519 | ||
520 | /* | |
521 | * Initialize per-regulator struct. | |
522 | * Inherit platform data, this comes down from the | |
523 | * i2c boarddata, from the machine. So if you want to | |
524 | * see what it looks like for a certain machine, go | |
525 | * into the machine I2C setup. | |
526 | */ | |
527 | reg->dev = &pdev->dev; | |
528 | if (plfdata) { | |
9b318353 LW |
529 | reg->plfdata = plfdata; |
530 | config.init_data = &plfdata->reg_constraints[i]; | |
8735bc2f LW |
531 | } else if (np) { |
532 | config.of_node = np; | |
533 | config.init_data = init_data; | |
9b318353 LW |
534 | } |
535 | config.dev = &pdev->dev; | |
536 | config.driver_data = reg; | |
537 | ||
fda5842c | 538 | rdev = devm_regulator_register(&pdev->dev, desc, &config); |
9b318353 LW |
539 | if (IS_ERR(rdev)) { |
540 | err = PTR_ERR(rdev); | |
541 | dev_err(&pdev->dev, | |
542 | "%s: failed to register regulator %s err %d\n", | |
543 | __func__, desc->name, | |
544 | err); | |
545 | return err; | |
546 | } | |
547 | ||
548 | /* Then set a pointer back to the registered regulator */ | |
549 | reg->rdev = rdev; | |
550 | return 0; | |
551 | } | |
552 | ||
8735bc2f LW |
553 | static struct of_regulator_match ab3100_regulator_matches[] = { |
554 | { .name = "ab3100_ldo_a", .driver_data = (void *) AB3100_LDO_A, }, | |
555 | { .name = "ab3100_ldo_c", .driver_data = (void *) AB3100_LDO_C, }, | |
556 | { .name = "ab3100_ldo_d", .driver_data = (void *) AB3100_LDO_D, }, | |
557 | { .name = "ab3100_ldo_e", .driver_data = (void *) AB3100_LDO_E, }, | |
558 | { .name = "ab3100_ldo_f", .driver_data = (void *) AB3100_LDO_F }, | |
559 | { .name = "ab3100_ldo_g", .driver_data = (void *) AB3100_LDO_G }, | |
560 | { .name = "ab3100_ldo_h", .driver_data = (void *) AB3100_LDO_H }, | |
561 | { .name = "ab3100_ldo_k", .driver_data = (void *) AB3100_LDO_K }, | |
562 | { .name = "ab3100_ext", .driver_data = (void *) AB3100_LDO_EXT }, | |
563 | { .name = "ab3100_buck", .driver_data = (void *) AB3100_BUCK }, | |
564 | }; | |
565 | ||
d619bc14 | 566 | /* |
8735bc2f LW |
567 | * Initial settings of ab3100 registers. |
568 | * Common for below LDO regulator settings are that | |
569 | * bit 7-5 controls voltage. Bit 4 turns regulator ON(1) or OFF(0). | |
570 | * Bit 3-2 controls sleep enable and bit 1-0 controls sleep mode. | |
d619bc14 | 571 | */ |
8735bc2f LW |
572 | /* LDO_A 0x16: 2.75V, ON, SLEEP_A, SLEEP OFF GND */ |
573 | #define LDO_A_SETTING 0x16 | |
574 | /* LDO_C 0x10: 2.65V, ON, SLEEP_A or B, SLEEP full power */ | |
575 | #define LDO_C_SETTING 0x10 | |
576 | /* LDO_D 0x10: 2.65V, ON, sleep mode not used */ | |
577 | #define LDO_D_SETTING 0x10 | |
578 | /* LDO_E 0x10: 1.8V, ON, SLEEP_A or B, SLEEP full power */ | |
579 | #define LDO_E_SETTING 0x10 | |
580 | /* LDO_E SLEEP 0x00: 1.8V, not used, SLEEP_A or B, not used */ | |
581 | #define LDO_E_SLEEP_SETTING 0x00 | |
582 | /* LDO_F 0xD0: 2.5V, ON, SLEEP_A or B, SLEEP full power */ | |
583 | #define LDO_F_SETTING 0xD0 | |
584 | /* LDO_G 0x00: 2.85V, OFF, SLEEP_A or B, SLEEP full power */ | |
585 | #define LDO_G_SETTING 0x00 | |
586 | /* LDO_H 0x18: 2.75V, ON, SLEEP_B, SLEEP full power */ | |
587 | #define LDO_H_SETTING 0x18 | |
588 | /* LDO_K 0x00: 2.75V, OFF, SLEEP_A or B, SLEEP full power */ | |
589 | #define LDO_K_SETTING 0x00 | |
590 | /* LDO_EXT 0x00: Voltage not set, OFF, not used, not used */ | |
591 | #define LDO_EXT_SETTING 0x00 | |
592 | /* BUCK 0x7D: 1.2V, ON, SLEEP_A and B, SLEEP low power */ | |
593 | #define BUCK_SETTING 0x7D | |
594 | /* BUCK SLEEP 0xAC: 1.05V, Not used, SLEEP_A and B, Not used */ | |
595 | #define BUCK_SLEEP_SETTING 0xAC | |
596 | ||
597 | static const u8 ab3100_reg_initvals[] = { | |
598 | LDO_A_SETTING, | |
599 | LDO_C_SETTING, | |
600 | LDO_E_SETTING, | |
601 | LDO_E_SLEEP_SETTING, | |
602 | LDO_F_SETTING, | |
603 | LDO_G_SETTING, | |
604 | LDO_H_SETTING, | |
605 | LDO_K_SETTING, | |
606 | LDO_EXT_SETTING, | |
607 | BUCK_SETTING, | |
608 | BUCK_SLEEP_SETTING, | |
609 | LDO_D_SETTING, | |
610 | }; | |
611 | ||
018fd856 AL |
612 | static int ab3100_regulators_remove(struct platform_device *pdev) |
613 | { | |
614 | int i; | |
615 | ||
616 | for (i = 0; i < AB3100_NUM_REGULATORS; i++) { | |
617 | struct ab3100_regulator *reg = &ab3100_regulators[i]; | |
618 | ||
018fd856 AL |
619 | reg->rdev = NULL; |
620 | } | |
621 | return 0; | |
622 | } | |
623 | ||
8735bc2f LW |
624 | static int |
625 | ab3100_regulator_of_probe(struct platform_device *pdev, struct device_node *np) | |
626 | { | |
627 | int err, i; | |
628 | ||
629 | /* | |
630 | * Set up the regulator registers, as was previously done with | |
631 | * platform data. | |
632 | */ | |
633 | /* Set up regulators */ | |
634 | for (i = 0; i < ARRAY_SIZE(ab3100_reg_init_order); i++) { | |
635 | err = abx500_set_register_interruptible(&pdev->dev, 0, | |
636 | ab3100_reg_init_order[i], | |
637 | ab3100_reg_initvals[i]); | |
638 | if (err) { | |
639 | dev_err(&pdev->dev, "regulator initialization failed with error %d\n", | |
640 | err); | |
641 | return err; | |
642 | } | |
643 | } | |
644 | ||
645 | for (i = 0; i < ARRAY_SIZE(ab3100_regulator_matches); i++) { | |
646 | err = ab3100_regulator_register( | |
647 | pdev, NULL, ab3100_regulator_matches[i].init_data, | |
648 | ab3100_regulator_matches[i].of_node, | |
23e21ddf | 649 | (unsigned long)ab3100_regulator_matches[i].driver_data); |
018fd856 AL |
650 | if (err) { |
651 | ab3100_regulators_remove(pdev); | |
8735bc2f | 652 | return err; |
018fd856 | 653 | } |
8735bc2f LW |
654 | } |
655 | ||
656 | return 0; | |
657 | } | |
658 | ||
d619bc14 | 659 | |
a5023574 | 660 | static int ab3100_regulators_probe(struct platform_device *pdev) |
d619bc14 | 661 | { |
dff91d0b | 662 | struct ab3100_platform_data *plfdata = dev_get_platdata(&pdev->dev); |
8735bc2f | 663 | struct device_node *np = pdev->dev.of_node; |
d619bc14 LW |
664 | int err = 0; |
665 | u8 data; | |
666 | int i; | |
667 | ||
668 | /* Check chip state */ | |
fa661258 | 669 | err = abx500_get_register_interruptible(&pdev->dev, 0, |
d619bc14 LW |
670 | AB3100_LDO_D, &data); |
671 | if (err) { | |
672 | dev_err(&pdev->dev, "could not read initial status of LDO_D\n"); | |
673 | return err; | |
674 | } | |
675 | if (data & 0x10) | |
676 | dev_notice(&pdev->dev, | |
677 | "chip is already in active mode (Warm start)\n"); | |
678 | else | |
679 | dev_notice(&pdev->dev, | |
680 | "chip is in inactive mode (Cold start)\n"); | |
681 | ||
8735bc2f LW |
682 | if (np) { |
683 | err = of_regulator_match(&pdev->dev, np, | |
684 | ab3100_regulator_matches, | |
685 | ARRAY_SIZE(ab3100_regulator_matches)); | |
686 | if (err < 0) { | |
687 | dev_err(&pdev->dev, | |
688 | "Error parsing regulator init data: %d\n", err); | |
689 | return err; | |
690 | } | |
691 | return ab3100_regulator_of_probe(pdev, np); | |
692 | } | |
693 | ||
d619bc14 LW |
694 | /* Set up regulators */ |
695 | for (i = 0; i < ARRAY_SIZE(ab3100_reg_init_order); i++) { | |
fa661258 | 696 | err = abx500_set_register_interruptible(&pdev->dev, 0, |
d619bc14 LW |
697 | ab3100_reg_init_order[i], |
698 | plfdata->reg_initvals[i]); | |
699 | if (err) { | |
700 | dev_err(&pdev->dev, "regulator initialization failed with error %d\n", | |
701 | err); | |
702 | return err; | |
703 | } | |
704 | } | |
705 | ||
d619bc14 LW |
706 | /* Register the regulators */ |
707 | for (i = 0; i < AB3100_NUM_REGULATORS; i++) { | |
9b318353 | 708 | struct regulator_desc *desc = &ab3100_regulator_desc[i]; |
c172708d | 709 | |
8735bc2f LW |
710 | err = ab3100_regulator_register(pdev, plfdata, NULL, NULL, |
711 | desc->id); | |
018fd856 AL |
712 | if (err) { |
713 | ab3100_regulators_remove(pdev); | |
d619bc14 | 714 | return err; |
018fd856 | 715 | } |
d619bc14 LW |
716 | } |
717 | ||
718 | return 0; | |
719 | } | |
720 | ||
d619bc14 LW |
721 | static struct platform_driver ab3100_regulators_driver = { |
722 | .driver = { | |
723 | .name = "ab3100-regulators", | |
724 | .owner = THIS_MODULE, | |
725 | }, | |
726 | .probe = ab3100_regulators_probe, | |
5eb9f2b9 | 727 | .remove = ab3100_regulators_remove, |
d619bc14 LW |
728 | }; |
729 | ||
730 | static __init int ab3100_regulators_init(void) | |
731 | { | |
732 | return platform_driver_register(&ab3100_regulators_driver); | |
733 | } | |
734 | ||
735 | static __exit void ab3100_regulators_exit(void) | |
736 | { | |
176f45b9 | 737 | platform_driver_unregister(&ab3100_regulators_driver); |
d619bc14 LW |
738 | } |
739 | ||
740 | subsys_initcall(ab3100_regulators_init); | |
741 | module_exit(ab3100_regulators_exit); | |
742 | ||
743 | MODULE_AUTHOR("Mattias Wallin <mattias.wallin@stericsson.com>"); | |
744 | MODULE_DESCRIPTION("AB3100 Regulator driver"); | |
745 | MODULE_LICENSE("GPL"); | |
746 | MODULE_ALIAS("platform:ab3100-regulators"); |