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e5ce4208 GG |
1 | /* |
2 | * Driver for Regulator part of Palmas PMIC Chips | |
3 | * | |
4 | * Copyright 2011-2012 Texas Instruments Inc. | |
5 | * | |
6 | * Author: Graeme Gregory <gg@slimlogic.co.uk> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License as published by the | |
10 | * Free Software Foundation; either version 2 of the License, or (at your | |
11 | * option) any later version. | |
12 | * | |
13 | */ | |
14 | ||
15 | #include <linux/kernel.h> | |
16 | #include <linux/module.h> | |
17 | #include <linux/init.h> | |
18 | #include <linux/err.h> | |
19 | #include <linux/platform_device.h> | |
20 | #include <linux/regulator/driver.h> | |
21 | #include <linux/regulator/machine.h> | |
22 | #include <linux/slab.h> | |
23 | #include <linux/regmap.h> | |
24 | #include <linux/mfd/palmas.h> | |
25 | ||
26 | struct regs_info { | |
27 | char *name; | |
28 | u8 vsel_addr; | |
29 | u8 ctrl_addr; | |
30 | u8 tstep_addr; | |
31 | }; | |
32 | ||
33 | static const struct regs_info palmas_regs_info[] = { | |
34 | { | |
35 | .name = "SMPS12", | |
36 | .vsel_addr = PALMAS_SMPS12_VOLTAGE, | |
37 | .ctrl_addr = PALMAS_SMPS12_CTRL, | |
38 | .tstep_addr = PALMAS_SMPS12_TSTEP, | |
39 | }, | |
40 | { | |
41 | .name = "SMPS123", | |
42 | .vsel_addr = PALMAS_SMPS12_VOLTAGE, | |
43 | .ctrl_addr = PALMAS_SMPS12_CTRL, | |
44 | .tstep_addr = PALMAS_SMPS12_TSTEP, | |
45 | }, | |
46 | { | |
47 | .name = "SMPS3", | |
48 | .vsel_addr = PALMAS_SMPS3_VOLTAGE, | |
49 | .ctrl_addr = PALMAS_SMPS3_CTRL, | |
50 | }, | |
51 | { | |
52 | .name = "SMPS45", | |
53 | .vsel_addr = PALMAS_SMPS45_VOLTAGE, | |
54 | .ctrl_addr = PALMAS_SMPS45_CTRL, | |
55 | .tstep_addr = PALMAS_SMPS45_TSTEP, | |
56 | }, | |
57 | { | |
58 | .name = "SMPS457", | |
59 | .vsel_addr = PALMAS_SMPS45_VOLTAGE, | |
60 | .ctrl_addr = PALMAS_SMPS45_CTRL, | |
61 | .tstep_addr = PALMAS_SMPS45_TSTEP, | |
62 | }, | |
63 | { | |
64 | .name = "SMPS6", | |
65 | .vsel_addr = PALMAS_SMPS6_VOLTAGE, | |
66 | .ctrl_addr = PALMAS_SMPS6_CTRL, | |
67 | .tstep_addr = PALMAS_SMPS6_TSTEP, | |
68 | }, | |
69 | { | |
70 | .name = "SMPS7", | |
71 | .vsel_addr = PALMAS_SMPS7_VOLTAGE, | |
72 | .ctrl_addr = PALMAS_SMPS7_CTRL, | |
73 | }, | |
74 | { | |
75 | .name = "SMPS8", | |
76 | .vsel_addr = PALMAS_SMPS8_VOLTAGE, | |
77 | .ctrl_addr = PALMAS_SMPS8_CTRL, | |
78 | .tstep_addr = PALMAS_SMPS8_TSTEP, | |
79 | }, | |
80 | { | |
81 | .name = "SMPS9", | |
82 | .vsel_addr = PALMAS_SMPS9_VOLTAGE, | |
83 | .ctrl_addr = PALMAS_SMPS9_CTRL, | |
84 | }, | |
85 | { | |
86 | .name = "SMPS10", | |
87 | }, | |
88 | { | |
89 | .name = "LDO1", | |
90 | .vsel_addr = PALMAS_LDO1_VOLTAGE, | |
91 | .ctrl_addr = PALMAS_LDO1_CTRL, | |
92 | }, | |
93 | { | |
94 | .name = "LDO2", | |
95 | .vsel_addr = PALMAS_LDO2_VOLTAGE, | |
96 | .ctrl_addr = PALMAS_LDO2_CTRL, | |
97 | }, | |
98 | { | |
99 | .name = "LDO3", | |
100 | .vsel_addr = PALMAS_LDO3_VOLTAGE, | |
101 | .ctrl_addr = PALMAS_LDO3_CTRL, | |
102 | }, | |
103 | { | |
104 | .name = "LDO4", | |
105 | .vsel_addr = PALMAS_LDO4_VOLTAGE, | |
106 | .ctrl_addr = PALMAS_LDO4_CTRL, | |
107 | }, | |
108 | { | |
109 | .name = "LDO5", | |
110 | .vsel_addr = PALMAS_LDO5_VOLTAGE, | |
111 | .ctrl_addr = PALMAS_LDO5_CTRL, | |
112 | }, | |
113 | { | |
114 | .name = "LDO6", | |
115 | .vsel_addr = PALMAS_LDO6_VOLTAGE, | |
116 | .ctrl_addr = PALMAS_LDO6_CTRL, | |
117 | }, | |
118 | { | |
119 | .name = "LDO7", | |
120 | .vsel_addr = PALMAS_LDO7_VOLTAGE, | |
121 | .ctrl_addr = PALMAS_LDO7_CTRL, | |
122 | }, | |
123 | { | |
124 | .name = "LDO8", | |
125 | .vsel_addr = PALMAS_LDO8_VOLTAGE, | |
126 | .ctrl_addr = PALMAS_LDO8_CTRL, | |
127 | }, | |
128 | { | |
129 | .name = "LDO9", | |
130 | .vsel_addr = PALMAS_LDO9_VOLTAGE, | |
131 | .ctrl_addr = PALMAS_LDO9_CTRL, | |
132 | }, | |
133 | { | |
134 | .name = "LDOLN", | |
135 | .vsel_addr = PALMAS_LDOLN_VOLTAGE, | |
136 | .ctrl_addr = PALMAS_LDOLN_CTRL, | |
137 | }, | |
138 | { | |
139 | .name = "LDOUSB", | |
140 | .vsel_addr = PALMAS_LDOUSB_VOLTAGE, | |
141 | .ctrl_addr = PALMAS_LDOUSB_CTRL, | |
142 | }, | |
143 | }; | |
144 | ||
145 | #define SMPS_CTRL_MODE_OFF 0x00 | |
146 | #define SMPS_CTRL_MODE_ON 0x01 | |
147 | #define SMPS_CTRL_MODE_ECO 0x02 | |
148 | #define SMPS_CTRL_MODE_PWM 0x03 | |
149 | ||
150 | /* These values are derived from the data sheet. And are the number of steps | |
151 | * where there is a voltage change, the ranges at beginning and end of register | |
152 | * max/min values where there are no change are ommitted. | |
153 | * | |
154 | * So they are basically (maxV-minV)/stepV | |
155 | */ | |
156 | #define PALMAS_SMPS_NUM_VOLTAGES 116 | |
157 | #define PALMAS_SMPS10_NUM_VOLTAGES 2 | |
158 | #define PALMAS_LDO_NUM_VOLTAGES 50 | |
159 | ||
160 | #define SMPS10_VSEL (1<<3) | |
161 | #define SMPS10_BOOST_EN (1<<2) | |
162 | #define SMPS10_BYPASS_EN (1<<1) | |
163 | #define SMPS10_SWITCH_EN (1<<0) | |
164 | ||
165 | #define REGULATOR_SLAVE 0 | |
166 | ||
167 | static int palmas_smps_read(struct palmas *palmas, unsigned int reg, | |
168 | unsigned int *dest) | |
169 | { | |
170 | unsigned int addr; | |
171 | ||
172 | addr = PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, reg); | |
173 | ||
174 | return regmap_read(palmas->regmap[REGULATOR_SLAVE], addr, dest); | |
175 | } | |
176 | ||
177 | static int palmas_smps_write(struct palmas *palmas, unsigned int reg, | |
178 | unsigned int value) | |
179 | { | |
180 | unsigned int addr; | |
181 | ||
182 | addr = PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, reg); | |
183 | ||
184 | return regmap_write(palmas->regmap[REGULATOR_SLAVE], addr, value); | |
185 | } | |
186 | ||
187 | static int palmas_ldo_read(struct palmas *palmas, unsigned int reg, | |
188 | unsigned int *dest) | |
189 | { | |
190 | unsigned int addr; | |
191 | ||
192 | addr = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE, reg); | |
193 | ||
194 | return regmap_read(palmas->regmap[REGULATOR_SLAVE], addr, dest); | |
195 | } | |
196 | ||
197 | static int palmas_ldo_write(struct palmas *palmas, unsigned int reg, | |
198 | unsigned int value) | |
199 | { | |
200 | unsigned int addr; | |
201 | ||
202 | addr = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE, reg); | |
203 | ||
204 | return regmap_write(palmas->regmap[REGULATOR_SLAVE], addr, value); | |
205 | } | |
206 | ||
207 | static int palmas_is_enabled_smps(struct regulator_dev *dev) | |
208 | { | |
209 | struct palmas_pmic *pmic = rdev_get_drvdata(dev); | |
210 | int id = rdev_get_id(dev); | |
211 | unsigned int reg; | |
212 | ||
213 | palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, ®); | |
214 | ||
215 | reg &= PALMAS_SMPS12_CTRL_STATUS_MASK; | |
216 | reg >>= PALMAS_SMPS12_CTRL_STATUS_SHIFT; | |
217 | ||
218 | return !!(reg); | |
219 | } | |
220 | ||
221 | static int palmas_enable_smps(struct regulator_dev *dev) | |
222 | { | |
223 | struct palmas_pmic *pmic = rdev_get_drvdata(dev); | |
224 | int id = rdev_get_id(dev); | |
225 | unsigned int reg; | |
226 | ||
227 | palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, ®); | |
228 | ||
229 | reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK; | |
230 | reg |= SMPS_CTRL_MODE_ON; | |
231 | ||
232 | palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg); | |
233 | ||
234 | return 0; | |
235 | } | |
236 | ||
237 | static int palmas_disable_smps(struct regulator_dev *dev) | |
238 | { | |
239 | struct palmas_pmic *pmic = rdev_get_drvdata(dev); | |
240 | int id = rdev_get_id(dev); | |
241 | unsigned int reg; | |
242 | ||
243 | palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, ®); | |
244 | ||
245 | reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK; | |
246 | ||
247 | palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg); | |
248 | ||
249 | return 0; | |
250 | } | |
251 | ||
252 | ||
253 | static int palmas_set_mode_smps(struct regulator_dev *dev, unsigned int mode) | |
254 | { | |
255 | struct palmas_pmic *pmic = rdev_get_drvdata(dev); | |
256 | int id = rdev_get_id(dev); | |
257 | unsigned int reg; | |
258 | ||
259 | palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, ®); | |
260 | reg &= ~PALMAS_SMPS12_CTRL_STATUS_MASK; | |
261 | reg >>= PALMAS_SMPS12_CTRL_STATUS_SHIFT; | |
262 | ||
263 | switch (mode) { | |
264 | case REGULATOR_MODE_NORMAL: | |
265 | reg |= SMPS_CTRL_MODE_ON; | |
266 | break; | |
267 | case REGULATOR_MODE_IDLE: | |
268 | reg |= SMPS_CTRL_MODE_ECO; | |
269 | break; | |
270 | case REGULATOR_MODE_FAST: | |
271 | reg |= SMPS_CTRL_MODE_PWM; | |
272 | break; | |
273 | default: | |
274 | return -EINVAL; | |
275 | } | |
276 | palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg); | |
277 | ||
278 | return 0; | |
279 | } | |
280 | ||
281 | static unsigned int palmas_get_mode_smps(struct regulator_dev *dev) | |
282 | { | |
283 | struct palmas_pmic *pmic = rdev_get_drvdata(dev); | |
284 | int id = rdev_get_id(dev); | |
285 | unsigned int reg; | |
286 | ||
287 | palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, ®); | |
288 | reg &= PALMAS_SMPS12_CTRL_STATUS_MASK; | |
289 | reg >>= PALMAS_SMPS12_CTRL_STATUS_SHIFT; | |
290 | ||
291 | switch (reg) { | |
292 | case SMPS_CTRL_MODE_ON: | |
293 | return REGULATOR_MODE_NORMAL; | |
294 | case SMPS_CTRL_MODE_ECO: | |
295 | return REGULATOR_MODE_IDLE; | |
296 | case SMPS_CTRL_MODE_PWM: | |
297 | return REGULATOR_MODE_FAST; | |
298 | } | |
299 | ||
300 | return 0; | |
301 | } | |
302 | ||
303 | static int palmas_list_voltage_smps(struct regulator_dev *dev, | |
304 | unsigned selector) | |
305 | { | |
306 | struct palmas_pmic *pmic = rdev_get_drvdata(dev); | |
307 | int id = rdev_get_id(dev); | |
308 | int mult = 1; | |
309 | ||
310 | if (!selector) | |
311 | return 0; | |
312 | ||
313 | /* Read the multiplier set in VSEL register to return | |
314 | * the correct voltage. | |
315 | */ | |
316 | if (pmic->range[id]) | |
317 | mult = 2; | |
318 | ||
319 | /* Voltage is (0.49V + (selector * 0.01V)) * RANGE | |
320 | * as defined in data sheet. RANGE is either x1 or x2 | |
321 | */ | |
322 | return (490000 + (selector * 10000)) * mult; | |
323 | } | |
324 | ||
325 | static int palmas_get_voltage_smps_sel(struct regulator_dev *dev) | |
326 | { | |
327 | struct palmas_pmic *pmic = rdev_get_drvdata(dev); | |
328 | int id = rdev_get_id(dev); | |
329 | int selector; | |
330 | unsigned int reg; | |
331 | unsigned int addr; | |
332 | ||
333 | addr = palmas_regs_info[id].vsel_addr; | |
334 | ||
335 | palmas_smps_read(pmic->palmas, addr, ®); | |
336 | ||
337 | selector = reg & PALMAS_SMPS12_VOLTAGE_VSEL_MASK; | |
338 | ||
339 | /* Adjust selector to match list_voltage ranges */ | |
340 | if ((selector > 0) && (selector < 6)) | |
341 | selector = 6; | |
342 | if (!selector) | |
343 | selector = 5; | |
344 | if (selector > 121) | |
345 | selector = 121; | |
346 | selector -= 5; | |
347 | ||
348 | return selector; | |
349 | } | |
350 | ||
351 | static int palmas_set_voltage_smps_sel(struct regulator_dev *dev, | |
352 | unsigned selector) | |
353 | { | |
354 | struct palmas_pmic *pmic = rdev_get_drvdata(dev); | |
355 | int id = rdev_get_id(dev); | |
356 | unsigned int reg = 0; | |
357 | unsigned int addr; | |
358 | ||
359 | addr = palmas_regs_info[id].vsel_addr; | |
360 | ||
361 | /* Make sure we don't change the value of RANGE */ | |
362 | if (pmic->range[id]) | |
363 | reg |= PALMAS_SMPS12_VOLTAGE_RANGE; | |
364 | ||
365 | /* Adjust the linux selector into range used in VSEL register */ | |
366 | if (selector) | |
367 | reg |= selector + 5; | |
368 | ||
369 | palmas_smps_write(pmic->palmas, addr, reg); | |
370 | ||
371 | return 0; | |
372 | } | |
373 | ||
374 | static int palmas_map_voltage_smps(struct regulator_dev *rdev, | |
375 | int min_uV, int max_uV) | |
376 | { | |
377 | int ret, voltage; | |
378 | ||
379 | ret = ((min_uV - 500000) / 10000) + 1; | |
380 | if (ret < 0) | |
381 | return ret; | |
382 | ||
383 | /* Map back into a voltage to verify we're still in bounds */ | |
384 | voltage = palmas_list_voltage_smps(rdev, ret); | |
385 | if (voltage < min_uV || voltage > max_uV) | |
386 | return -EINVAL; | |
387 | ||
388 | return ret; | |
389 | } | |
390 | ||
391 | static struct regulator_ops palmas_ops_smps = { | |
392 | .is_enabled = palmas_is_enabled_smps, | |
393 | .enable = palmas_enable_smps, | |
394 | .disable = palmas_disable_smps, | |
395 | .set_mode = palmas_set_mode_smps, | |
396 | .get_mode = palmas_get_mode_smps, | |
397 | .get_voltage_sel = palmas_get_voltage_smps_sel, | |
398 | .set_voltage_sel = palmas_set_voltage_smps_sel, | |
399 | .list_voltage = palmas_list_voltage_smps, | |
400 | .map_voltage = palmas_map_voltage_smps, | |
401 | }; | |
402 | ||
403 | static int palmas_list_voltage_smps10(struct regulator_dev *dev, | |
404 | unsigned selector) | |
405 | { | |
406 | return 3750000 + (selector * 1250000); | |
407 | } | |
408 | ||
409 | static struct regulator_ops palmas_ops_smps10 = { | |
410 | .is_enabled = regulator_is_enabled_regmap, | |
411 | .enable = regulator_enable_regmap, | |
412 | .disable = regulator_disable_regmap, | |
413 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
414 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
415 | .list_voltage = palmas_list_voltage_smps10, | |
416 | }; | |
417 | ||
418 | static int palmas_is_enabled_ldo(struct regulator_dev *dev) | |
419 | { | |
420 | struct palmas_pmic *pmic = rdev_get_drvdata(dev); | |
421 | int id = rdev_get_id(dev); | |
422 | unsigned int reg; | |
423 | ||
424 | palmas_ldo_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, ®); | |
425 | ||
426 | reg &= PALMAS_LDO1_CTRL_STATUS; | |
427 | ||
428 | return !!(reg); | |
429 | } | |
430 | ||
431 | static int palmas_list_voltage_ldo(struct regulator_dev *dev, | |
432 | unsigned selector) | |
433 | { | |
434 | if (!selector) | |
435 | return 0; | |
436 | ||
437 | /* voltage is 0.85V + (selector * 0.05v) */ | |
438 | return 850000 + (selector * 50000); | |
439 | } | |
440 | ||
441 | static int palmas_get_voltage_ldo_sel(struct regulator_dev *dev) | |
442 | { | |
443 | struct palmas_pmic *pmic = rdev_get_drvdata(dev); | |
444 | int id = rdev_get_id(dev); | |
445 | int selector; | |
446 | unsigned int reg; | |
447 | unsigned int addr; | |
448 | ||
449 | addr = palmas_regs_info[id].vsel_addr; | |
450 | ||
451 | palmas_ldo_read(pmic->palmas, addr, ®); | |
452 | ||
453 | selector = reg & PALMAS_LDO1_VOLTAGE_VSEL_MASK; | |
454 | ||
455 | /* Adjust selector to match list_voltage ranges */ | |
456 | if (selector > 49) | |
457 | selector = 49; | |
458 | ||
459 | return selector; | |
460 | } | |
461 | ||
462 | static int palmas_set_voltage_ldo_sel(struct regulator_dev *dev, | |
463 | unsigned selector) | |
464 | { | |
465 | struct palmas_pmic *pmic = rdev_get_drvdata(dev); | |
466 | int id = rdev_get_id(dev); | |
467 | unsigned int reg = 0; | |
468 | unsigned int addr; | |
469 | ||
470 | addr = palmas_regs_info[id].vsel_addr; | |
471 | ||
472 | reg = selector; | |
473 | ||
474 | palmas_ldo_write(pmic->palmas, addr, reg); | |
475 | ||
476 | return 0; | |
477 | } | |
478 | ||
479 | static int palmas_map_voltage_ldo(struct regulator_dev *rdev, | |
480 | int min_uV, int max_uV) | |
481 | { | |
482 | int ret, voltage; | |
483 | ||
484 | ret = ((min_uV - 900000) / 50000) + 1; | |
485 | if (ret < 0) | |
486 | return ret; | |
487 | ||
488 | /* Map back into a voltage to verify we're still in bounds */ | |
489 | voltage = palmas_list_voltage_ldo(rdev, ret); | |
490 | if (voltage < min_uV || voltage > max_uV) | |
491 | return -EINVAL; | |
492 | ||
493 | return ret; | |
494 | } | |
495 | ||
496 | static struct regulator_ops palmas_ops_ldo = { | |
497 | .is_enabled = palmas_is_enabled_ldo, | |
498 | .enable = regulator_enable_regmap, | |
499 | .disable = regulator_disable_regmap, | |
500 | .get_voltage_sel = palmas_get_voltage_ldo_sel, | |
501 | .set_voltage_sel = palmas_set_voltage_ldo_sel, | |
502 | .list_voltage = palmas_list_voltage_ldo, | |
503 | .map_voltage = palmas_map_voltage_ldo, | |
504 | }; | |
505 | ||
506 | /* | |
507 | * setup the hardware based sleep configuration of the SMPS/LDO regulators | |
508 | * from the platform data. This is different to the software based control | |
509 | * supported by the regulator framework as it is controlled by toggling | |
510 | * pins on the PMIC such as PREQ, SYSEN, ... | |
511 | */ | |
512 | static int palmas_smps_init(struct palmas *palmas, int id, | |
513 | struct palmas_reg_init *reg_init) | |
514 | { | |
515 | unsigned int reg; | |
516 | unsigned int addr; | |
517 | int ret; | |
518 | ||
519 | addr = palmas_regs_info[id].ctrl_addr; | |
520 | ||
521 | ret = palmas_smps_read(palmas, addr, ®); | |
522 | if (ret) | |
523 | return ret; | |
524 | ||
525 | if (id != PALMAS_REG_SMPS10) { | |
526 | if (reg_init->warm_reset) | |
527 | reg |= PALMAS_SMPS12_CTRL_WR_S; | |
528 | ||
529 | if (reg_init->roof_floor) | |
530 | reg |= PALMAS_SMPS12_CTRL_ROOF_FLOOR_EN; | |
531 | ||
532 | if (reg_init->mode_sleep) { | |
533 | reg &= ~PALMAS_SMPS12_CTRL_MODE_SLEEP_MASK; | |
534 | reg |= reg_init->mode_sleep << | |
535 | PALMAS_SMPS12_CTRL_MODE_SLEEP_SHIFT; | |
536 | } | |
537 | } else { | |
538 | if (reg_init->mode_sleep) { | |
539 | reg &= ~PALMAS_SMPS10_CTRL_MODE_SLEEP_MASK; | |
540 | reg |= reg_init->mode_sleep << | |
541 | PALMAS_SMPS10_CTRL_MODE_SLEEP_SHIFT; | |
542 | } | |
543 | ||
544 | } | |
545 | ret = palmas_smps_write(palmas, addr, reg); | |
546 | if (ret) | |
547 | return ret; | |
548 | ||
549 | if (palmas_regs_info[id].tstep_addr && reg_init->tstep) { | |
550 | addr = palmas_regs_info[id].tstep_addr; | |
551 | ||
552 | reg = reg_init->tstep & PALMAS_SMPS12_TSTEP_TSTEP_MASK; | |
553 | ||
554 | ret = palmas_smps_write(palmas, addr, reg); | |
555 | if (ret) | |
556 | return ret; | |
557 | } | |
558 | ||
559 | if (palmas_regs_info[id].vsel_addr && reg_init->vsel) { | |
560 | addr = palmas_regs_info[id].vsel_addr; | |
561 | ||
562 | reg = reg_init->vsel; | |
563 | ||
564 | ret = palmas_smps_write(palmas, addr, reg); | |
565 | if (ret) | |
566 | return ret; | |
567 | } | |
568 | ||
569 | ||
570 | return 0; | |
571 | } | |
572 | ||
573 | static int palmas_ldo_init(struct palmas *palmas, int id, | |
574 | struct palmas_reg_init *reg_init) | |
575 | { | |
576 | unsigned int reg; | |
577 | unsigned int addr; | |
578 | int ret; | |
579 | ||
580 | addr = palmas_regs_info[id].ctrl_addr; | |
581 | ||
582 | ret = palmas_smps_read(palmas, addr, ®); | |
583 | if (ret) | |
584 | return ret; | |
585 | ||
586 | if (reg_init->warm_reset) | |
587 | reg |= PALMAS_LDO1_CTRL_WR_S; | |
588 | ||
589 | if (reg_init->mode_sleep) | |
590 | reg |= PALMAS_LDO1_CTRL_MODE_SLEEP; | |
591 | ||
592 | ret = palmas_smps_write(palmas, addr, reg); | |
593 | if (ret) | |
594 | return ret; | |
595 | ||
596 | return 0; | |
597 | } | |
598 | ||
599 | static __devinit int palmas_probe(struct platform_device *pdev) | |
600 | { | |
601 | struct palmas *palmas = dev_get_drvdata(pdev->dev.parent); | |
602 | struct palmas_pmic_platform_data *pdata = pdev->dev.platform_data; | |
603 | struct regulator_dev *rdev; | |
604 | struct regulator_config config = { }; | |
605 | struct palmas_pmic *pmic; | |
606 | struct palmas_reg_init *reg_init; | |
607 | int id = 0, ret; | |
608 | unsigned int addr, reg; | |
609 | ||
610 | if (!pdata) | |
611 | return -EINVAL; | |
612 | if (!pdata->reg_data) | |
613 | return -EINVAL; | |
614 | ||
615 | pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL); | |
616 | if (!pmic) | |
617 | return -ENOMEM; | |
618 | ||
619 | pmic->dev = &pdev->dev; | |
620 | pmic->palmas = palmas; | |
621 | palmas->pmic = pmic; | |
622 | platform_set_drvdata(pdev, pmic); | |
623 | ||
624 | ret = palmas_smps_read(palmas, PALMAS_SMPS_CTRL, ®); | |
625 | if (ret) | |
626 | goto err_unregister_regulator; | |
627 | ||
628 | if (reg & PALMAS_SMPS_CTRL_SMPS12_SMPS123_EN) | |
629 | pmic->smps123 = 1; | |
630 | ||
631 | if (reg & PALMAS_SMPS_CTRL_SMPS45_SMPS457_EN) | |
632 | pmic->smps457 = 1; | |
633 | ||
634 | config.regmap = palmas->regmap[REGULATOR_SLAVE]; | |
635 | config.dev = &pdev->dev; | |
636 | config.driver_data = pmic; | |
637 | ||
638 | for (id = 0; id < PALMAS_REG_LDO1; id++) { | |
639 | ||
640 | /* | |
641 | * Miss out regulators which are not available due | |
642 | * to slaving configurations. | |
643 | */ | |
644 | switch (id) { | |
645 | case PALMAS_REG_SMPS12: | |
646 | case PALMAS_REG_SMPS3: | |
647 | if (pmic->smps123) | |
648 | continue; | |
649 | break; | |
650 | case PALMAS_REG_SMPS123: | |
651 | if (!pmic->smps123) | |
652 | continue; | |
653 | break; | |
654 | case PALMAS_REG_SMPS45: | |
655 | case PALMAS_REG_SMPS7: | |
656 | if (pmic->smps457) | |
657 | continue; | |
658 | break; | |
659 | case PALMAS_REG_SMPS457: | |
660 | if (!pmic->smps457) | |
661 | continue; | |
662 | } | |
663 | ||
664 | /* Register the regulators */ | |
665 | pmic->desc[id].name = palmas_regs_info[id].name; | |
666 | pmic->desc[id].id = id; | |
667 | ||
668 | if (id != PALMAS_REG_SMPS10) { | |
669 | pmic->desc[id].ops = &palmas_ops_smps; | |
670 | pmic->desc[id].n_voltages = PALMAS_SMPS_NUM_VOLTAGES; | |
671 | } else { | |
672 | pmic->desc[id].n_voltages = PALMAS_SMPS10_NUM_VOLTAGES; | |
673 | pmic->desc[id].ops = &palmas_ops_smps10; | |
674 | pmic->desc[id].vsel_reg = PALMAS_SMPS10_CTRL; | |
675 | pmic->desc[id].vsel_mask = SMPS10_VSEL; | |
676 | pmic->desc[id].enable_reg = PALMAS_SMPS10_STATUS; | |
677 | pmic->desc[id].enable_mask = SMPS10_BOOST_EN; | |
678 | } | |
679 | ||
680 | pmic->desc[id].type = REGULATOR_VOLTAGE; | |
681 | pmic->desc[id].owner = THIS_MODULE; | |
682 | ||
683 | /* Initialise sleep/init values from platform data */ | |
684 | if (pdata && pdata->reg_init) { | |
685 | reg_init = pdata->reg_init[id]; | |
686 | if (reg_init) { | |
687 | ret = palmas_smps_init(palmas, id, reg_init); | |
688 | if (ret) | |
689 | goto err_unregister_regulator; | |
690 | } | |
691 | } | |
692 | ||
693 | /* | |
694 | * read and store the RANGE bit for later use | |
695 | * This must be done before regulator is probed otherwise | |
696 | * we error in probe with unsuportable ranges. | |
697 | */ | |
698 | if (id != PALMAS_REG_SMPS10) { | |
699 | addr = palmas_regs_info[id].vsel_addr; | |
700 | ||
701 | ret = palmas_smps_read(pmic->palmas, addr, ®); | |
702 | if (ret) | |
703 | goto err_unregister_regulator; | |
704 | if (reg & PALMAS_SMPS12_VOLTAGE_RANGE) | |
705 | pmic->range[id] = 1; | |
706 | } | |
707 | ||
708 | if (pdata && pdata->reg_data) | |
709 | config.init_data = pdata->reg_data[id]; | |
710 | else | |
711 | config.init_data = NULL; | |
712 | ||
713 | rdev = regulator_register(&pmic->desc[id], &config); | |
714 | if (IS_ERR(rdev)) { | |
715 | dev_err(&pdev->dev, | |
716 | "failed to register %s regulator\n", | |
717 | pdev->name); | |
718 | ret = PTR_ERR(rdev); | |
719 | goto err_unregister_regulator; | |
720 | } | |
721 | ||
722 | /* Save regulator for cleanup */ | |
723 | pmic->rdev[id] = rdev; | |
724 | } | |
725 | ||
726 | /* Start this loop from the id left from previous loop */ | |
727 | for (; id < PALMAS_NUM_REGS; id++) { | |
728 | ||
729 | /* Miss out regulators which are not available due | |
730 | * to alternate functions. | |
731 | */ | |
732 | ||
733 | /* Register the regulators */ | |
734 | pmic->desc[id].name = palmas_regs_info[id].name; | |
735 | pmic->desc[id].id = id; | |
736 | pmic->desc[id].n_voltages = PALMAS_LDO_NUM_VOLTAGES; | |
737 | ||
738 | pmic->desc[id].ops = &palmas_ops_ldo; | |
739 | ||
740 | pmic->desc[id].type = REGULATOR_VOLTAGE; | |
741 | pmic->desc[id].owner = THIS_MODULE; | |
742 | pmic->desc[id].enable_reg = palmas_regs_info[id].ctrl_addr; | |
743 | pmic->desc[id].enable_mask = PALMAS_LDO1_CTRL_MODE_ACTIVE; | |
744 | ||
745 | if (pdata && pdata->reg_data) | |
746 | config.init_data = pdata->reg_data[id]; | |
747 | else | |
748 | config.init_data = NULL; | |
749 | ||
750 | rdev = regulator_register(&pmic->desc[id], &config); | |
751 | if (IS_ERR(rdev)) { | |
752 | dev_err(&pdev->dev, | |
753 | "failed to register %s regulator\n", | |
754 | pdev->name); | |
755 | ret = PTR_ERR(rdev); | |
756 | goto err_unregister_regulator; | |
757 | } | |
758 | ||
759 | /* Save regulator for cleanup */ | |
760 | pmic->rdev[id] = rdev; | |
761 | ||
762 | /* Initialise sleep/init values from platform data */ | |
763 | if (pdata->reg_init) { | |
764 | reg_init = pdata->reg_init[id]; | |
765 | if (reg_init) { | |
766 | ret = palmas_ldo_init(palmas, id, reg_init); | |
767 | if (ret) | |
768 | goto err_unregister_regulator; | |
769 | } | |
770 | } | |
771 | } | |
772 | ||
773 | return 0; | |
774 | ||
775 | err_unregister_regulator: | |
776 | while (--id >= 0) | |
777 | regulator_unregister(pmic->rdev[id]); | |
778 | kfree(pmic->rdev); | |
779 | kfree(pmic->desc); | |
780 | kfree(pmic); | |
781 | return ret; | |
782 | } | |
783 | ||
784 | static int __devexit palmas_remove(struct platform_device *pdev) | |
785 | { | |
786 | struct palmas_pmic *pmic = platform_get_drvdata(pdev); | |
787 | int id; | |
788 | ||
789 | for (id = 0; id < PALMAS_NUM_REGS; id++) | |
790 | regulator_unregister(pmic->rdev[id]); | |
791 | ||
792 | kfree(pmic->rdev); | |
793 | kfree(pmic->desc); | |
794 | kfree(pmic); | |
795 | return 0; | |
796 | } | |
797 | ||
798 | static struct platform_driver palmas_driver = { | |
799 | .driver = { | |
800 | .name = "palmas-pmic", | |
801 | .owner = THIS_MODULE, | |
802 | }, | |
803 | .probe = palmas_probe, | |
804 | .remove = __devexit_p(palmas_remove), | |
805 | }; | |
806 | ||
807 | static int __init palmas_init(void) | |
808 | { | |
809 | return platform_driver_register(&palmas_driver); | |
810 | } | |
811 | subsys_initcall(palmas_init); | |
812 | ||
813 | static void __exit palmas_exit(void) | |
814 | { | |
815 | platform_driver_unregister(&palmas_driver); | |
816 | } | |
817 | module_exit(palmas_exit); | |
818 | ||
819 | MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>"); | |
820 | MODULE_DESCRIPTION("Palmas voltage regulator driver"); | |
821 | MODULE_LICENSE("GPL"); | |
822 | MODULE_ALIAS("platform:palmas-pmic"); |