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1/*
2 * tps65912.c -- TI tps65912
3 *
4 * Copyright 2011 Texas Instruments Inc.
5 *
6 * Author: Margarita Olaya Cabrera <magi@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 * This driver is based on wm8350 implementation.
14 */
15
16#include <linux/kernel.h>
17#include <linux/module.h>
18#include <linux/init.h>
19#include <linux/err.h>
20#include <linux/platform_device.h>
21#include <linux/regulator/driver.h>
22#include <linux/regulator/machine.h>
23#include <linux/delay.h>
24#include <linux/slab.h>
25#include <linux/gpio.h>
26#include <linux/mfd/tps65912.h>
27
28/* DCDC's */
29#define TPS65912_REG_DCDC1 0
30#define TPS65912_REG_DCDC2 1
31#define TPS65912_REG_DCDC3 2
32#define TPS65912_REG_DCDC4 3
33
34/* LDOs */
35#define TPS65912_REG_LDO1 4
36#define TPS65912_REG_LDO2 5
37#define TPS65912_REG_LDO3 6
38#define TPS65912_REG_LDO4 7
39#define TPS65912_REG_LDO5 8
40#define TPS65912_REG_LDO6 9
41#define TPS65912_REG_LDO7 10
42#define TPS65912_REG_LDO8 11
43#define TPS65912_REG_LDO9 12
44#define TPS65912_REG_LDO10 13
45
46#define TPS65912_MAX_REG_ID TPS65912_REG_LDO_10
47
48/* Number of step-down converters available */
49#define TPS65912_NUM_DCDC 4
50
51/* Number of LDO voltage regulators available */
52#define TPS65912_NUM_LDO 10
53
54/* Number of total regulators available */
55#define TPS65912_NUM_REGULATOR (TPS65912_NUM_DCDC + TPS65912_NUM_LDO)
56
57#define TPS65912_REG_ENABLED 0x80
58#define OP_SELREG_MASK 0x40
59#define OP_SELREG_SHIFT 6
60
61struct tps_info {
62 const char *name;
63};
64
65static struct tps_info tps65912_regs[] = {
66 {
67 .name = "DCDC1",
68 },
69 {
70 .name = "DCDC2",
71 },
72 {
73 .name = "DCDC3",
74 },
75 {
76 .name = "DCDC4",
77 },
78 {
79 .name = "LDO1",
80 },
81 {
82 .name = "LDO2",
83 },
84 {
85 .name = "LDO3",
86 },
87 {
88 .name = "LDO4",
89 },
90 {
91 .name = "LDO5",
92 },
93 {
94 .name = "LDO6",
95 },
96 {
97 .name = "LDO7",
98 },
99 {
100 .name = "LDO8",
101 },
102 {
103 .name = "LDO9",
104 },
105 {
106 .name = "LDO10",
107 },
108};
109
110struct tps65912_reg {
111 struct regulator_desc desc[TPS65912_NUM_REGULATOR];
112 struct tps65912 *mfd;
113 struct regulator_dev *rdev[TPS65912_NUM_REGULATOR];
114 struct tps_info *info[TPS65912_NUM_REGULATOR];
115 /* for read/write access */
116 struct mutex io_lock;
117 int mode;
118 int (*get_ctrl_reg)(int);
119 int dcdc1_range;
120 int dcdc2_range;
121 int dcdc3_range;
122 int dcdc4_range;
123 int pwm_mode_reg;
124 int eco_reg;
125};
126
127static int tps65912_get_range(struct tps65912_reg *pmic, int id)
128{
129 struct tps65912 *mfd = pmic->mfd;
130
131 if (id > TPS65912_REG_DCDC4)
132 return 0;
133
134 switch (id) {
135 case TPS65912_REG_DCDC1:
136 pmic->dcdc1_range = tps65912_reg_read(mfd,
137 TPS65912_DCDC1_LIMIT);
138 if (pmic->dcdc1_range < 0)
139 return pmic->dcdc1_range;
140 pmic->dcdc1_range = (pmic->dcdc1_range &
141 DCDC_LIMIT_RANGE_MASK) >> DCDC_LIMIT_RANGE_SHIFT;
142 return pmic->dcdc1_range;
143 case TPS65912_REG_DCDC2:
144 pmic->dcdc2_range = tps65912_reg_read(mfd,
145 TPS65912_DCDC2_LIMIT);
146 if (pmic->dcdc2_range < 0)
147 return pmic->dcdc2_range;
148 pmic->dcdc2_range = (pmic->dcdc2_range &
149 DCDC_LIMIT_RANGE_MASK) >> DCDC_LIMIT_RANGE_SHIFT;
150 return pmic->dcdc2_range;
151 case TPS65912_REG_DCDC3:
152 pmic->dcdc3_range = tps65912_reg_read(mfd,
153 TPS65912_DCDC3_LIMIT);
154 if (pmic->dcdc3_range < 0)
155 return pmic->dcdc3_range;
156 pmic->dcdc3_range = (pmic->dcdc3_range &
157 DCDC_LIMIT_RANGE_MASK) >> DCDC_LIMIT_RANGE_SHIFT;
158 return pmic->dcdc3_range;
159 case TPS65912_REG_DCDC4:
160 pmic->dcdc4_range = tps65912_reg_read(mfd,
161 TPS65912_DCDC4_LIMIT);
162 if (pmic->dcdc4_range < 0)
163 return pmic->dcdc4_range;
164 pmic->dcdc4_range = (pmic->dcdc4_range &
165 DCDC_LIMIT_RANGE_MASK) >> DCDC_LIMIT_RANGE_SHIFT;
166 return pmic->dcdc4_range;
167 default:
168 return 0;
169 }
170}
171
172static unsigned long tps65912_vsel_to_uv_range0(u8 vsel)
173{
174 unsigned long uv;
175
176 uv = ((vsel * 12500) + 500000);
177 return uv;
178}
179
180static unsigned long tps65912_vsel_to_uv_range1(u8 vsel)
181{
182 unsigned long uv;
183
184 uv = ((vsel * 12500) + 700000);
185 return uv;
186}
187
188static unsigned long tps65912_vsel_to_uv_range2(u8 vsel)
189{
190 unsigned long uv;
191
192 uv = ((vsel * 25000) + 500000);
193 return uv;
194}
195
196static unsigned long tps65912_vsel_to_uv_range3(u8 vsel)
197{
198 unsigned long uv;
199
200 if (vsel == 0x3f)
201 uv = 3800000;
202 else
203 uv = ((vsel * 50000) + 500000);
204
205 return uv;
206}
207
208static unsigned long tps65912_vsel_to_uv_ldo(u8 vsel)
209{
210 unsigned long uv = 0;
211
212 if (vsel <= 32)
213 uv = ((vsel * 25000) + 800000);
214 else if (vsel > 32 && vsel <= 60)
215 uv = (((vsel - 32) * 50000) + 1600000);
216 else if (vsel > 60)
217 uv = (((vsel - 60) * 100000) + 3000000);
218
219 return uv;
220}
221
222static int tps65912_get_ctrl_register(int id)
223{
224 switch (id) {
225 case TPS65912_REG_DCDC1:
226 return TPS65912_DCDC1_AVS;
227 case TPS65912_REG_DCDC2:
228 return TPS65912_DCDC2_AVS;
229 case TPS65912_REG_DCDC3:
230 return TPS65912_DCDC3_AVS;
231 case TPS65912_REG_DCDC4:
232 return TPS65912_DCDC4_AVS;
233 case TPS65912_REG_LDO1:
234 return TPS65912_LDO1_AVS;
235 case TPS65912_REG_LDO2:
236 return TPS65912_LDO2_AVS;
237 case TPS65912_REG_LDO3:
238 return TPS65912_LDO3_AVS;
239 case TPS65912_REG_LDO4:
240 return TPS65912_LDO4_AVS;
241 case TPS65912_REG_LDO5:
242 return TPS65912_LDO5;
243 case TPS65912_REG_LDO6:
244 return TPS65912_LDO6;
245 case TPS65912_REG_LDO7:
246 return TPS65912_LDO7;
247 case TPS65912_REG_LDO8:
248 return TPS65912_LDO8;
249 case TPS65912_REG_LDO9:
250 return TPS65912_LDO9;
251 case TPS65912_REG_LDO10:
252 return TPS65912_LDO10;
253 default:
254 return -EINVAL;
255 }
256}
257
258static int tps65912_get_dcdc_sel_register(struct tps65912_reg *pmic, int id)
259{
260 struct tps65912 *mfd = pmic->mfd;
261 int opvsel = 0, sr = 0;
262 u8 reg = 0;
263
264 if (id < TPS65912_REG_DCDC1 || id > TPS65912_REG_DCDC4)
265 return -EINVAL;
266
267 switch (id) {
268 case TPS65912_REG_DCDC1:
269 opvsel = tps65912_reg_read(mfd, TPS65912_DCDC1_OP);
270 sr = ((opvsel & OP_SELREG_MASK) >> OP_SELREG_SHIFT);
271 if (sr)
272 reg = TPS65912_DCDC1_AVS;
273 else
274 reg = TPS65912_DCDC1_OP;
275 break;
276 case TPS65912_REG_DCDC2:
277 opvsel = tps65912_reg_read(mfd, TPS65912_DCDC2_OP);
278 sr = (opvsel & OP_SELREG_MASK) >> OP_SELREG_SHIFT;
279 if (sr)
280 reg = TPS65912_DCDC2_AVS;
281 else
282 reg = TPS65912_DCDC2_OP;
283 break;
284 case TPS65912_REG_DCDC3:
285 opvsel = tps65912_reg_read(mfd, TPS65912_DCDC3_OP);
286 sr = (opvsel & OP_SELREG_MASK) >> OP_SELREG_SHIFT;
287 if (sr)
288 reg = TPS65912_DCDC3_AVS;
289 else
290 reg = TPS65912_DCDC3_OP;
291 break;
292 case TPS65912_REG_DCDC4:
293 opvsel = tps65912_reg_read(mfd, TPS65912_DCDC4_OP);
294 sr = (opvsel & OP_SELREG_MASK) >> OP_SELREG_SHIFT;
295 if (sr)
296 reg = TPS65912_DCDC4_AVS;
297 else
298 reg = TPS65912_DCDC4_OP;
299 break;
300 }
301 return reg;
302}
303
304static int tps65912_get_ldo_sel_register(struct tps65912_reg *pmic, int id)
305{
306 struct tps65912 *mfd = pmic->mfd;
307 int opvsel = 0, sr = 0;
308 u8 reg = 0;
309
310 if (id < TPS65912_REG_LDO1 || id > TPS65912_REG_LDO10)
311 return -EINVAL;
312
313 switch (id) {
314 case TPS65912_REG_LDO1:
315 opvsel = tps65912_reg_read(mfd, TPS65912_LDO1_OP);
316 sr = (opvsel & OP_SELREG_MASK) >> OP_SELREG_SHIFT;
317 if (sr)
318 reg = TPS65912_LDO1_AVS;
319 else
320 reg = TPS65912_LDO1_OP;
321 break;
322 case TPS65912_REG_LDO2:
323 opvsel = tps65912_reg_read(mfd, TPS65912_LDO2_OP);
324 sr = (opvsel & OP_SELREG_MASK) >> OP_SELREG_SHIFT;
325 if (sr)
326 reg = TPS65912_LDO2_AVS;
327 else
328 reg = TPS65912_LDO2_OP;
329 break;
330 case TPS65912_REG_LDO3:
331 opvsel = tps65912_reg_read(mfd, TPS65912_LDO3_OP);
332 sr = (opvsel & OP_SELREG_MASK) >> OP_SELREG_SHIFT;
333 if (sr)
334 reg = TPS65912_LDO3_AVS;
335 else
336 reg = TPS65912_LDO3_OP;
337 break;
338 case TPS65912_REG_LDO4:
339 opvsel = tps65912_reg_read(mfd, TPS65912_LDO4_OP);
340 sr = (opvsel & OP_SELREG_MASK) >> OP_SELREG_SHIFT;
341 if (sr)
342 reg = TPS65912_LDO4_AVS;
343 else
344 reg = TPS65912_LDO4_OP;
345 break;
346 case TPS65912_REG_LDO5:
347 reg = TPS65912_LDO5;
348 break;
349 case TPS65912_REG_LDO6:
350 reg = TPS65912_LDO6;
351 break;
352 case TPS65912_REG_LDO7:
353 reg = TPS65912_LDO7;
354 break;
355 case TPS65912_REG_LDO8:
356 reg = TPS65912_LDO8;
357 break;
358 case TPS65912_REG_LDO9:
359 reg = TPS65912_LDO9;
360 break;
361 case TPS65912_REG_LDO10:
362 reg = TPS65912_LDO10;
363 break;
364 }
365
366 return reg;
367}
368
369static int tps65912_get_mode_regiters(struct tps65912_reg *pmic, int id)
370{
371 switch (id) {
372 case TPS65912_REG_DCDC1:
373 pmic->pwm_mode_reg = TPS65912_DCDC1_CTRL;
374 pmic->eco_reg = TPS65912_DCDC1_AVS;
375 break;
376 case TPS65912_REG_DCDC2:
377 pmic->pwm_mode_reg = TPS65912_DCDC2_CTRL;
378 pmic->eco_reg = TPS65912_DCDC2_AVS;
379 break;
380 case TPS65912_REG_DCDC3:
381 pmic->pwm_mode_reg = TPS65912_DCDC3_CTRL;
382 pmic->eco_reg = TPS65912_DCDC3_AVS;
383 break;
384 case TPS65912_REG_DCDC4:
385 pmic->pwm_mode_reg = TPS65912_DCDC4_CTRL;
386 pmic->eco_reg = TPS65912_DCDC4_AVS;
387 break;
388 default:
389 return -EINVAL;
390 }
391
392 return 0;
393}
394
395static int tps65912_reg_is_enabled(struct regulator_dev *dev)
396{
397 struct tps65912_reg *pmic = rdev_get_drvdata(dev);
398 struct tps65912 *mfd = pmic->mfd;
399 int reg, value, id = rdev_get_id(dev);
400
401 if (id < TPS65912_REG_DCDC1 || id > TPS65912_REG_LDO10)
402 return -EINVAL;
403
404 reg = pmic->get_ctrl_reg(id);
405 if (reg < 0)
406 return reg;
407
408 value = tps65912_reg_read(mfd, reg);
409 if (value < 0)
410 return value;
411
412 return value & TPS65912_REG_ENABLED;
413}
414
415static int tps65912_reg_enable(struct regulator_dev *dev)
416{
417 struct tps65912_reg *pmic = rdev_get_drvdata(dev);
418 struct tps65912 *mfd = pmic->mfd;
419 int id = rdev_get_id(dev);
420 int reg;
421
422 if (id < TPS65912_REG_DCDC1 || id > TPS65912_REG_LDO10)
423 return -EINVAL;
424
425 reg = pmic->get_ctrl_reg(id);
426 if (reg < 0)
427 return reg;
428
429 return tps65912_set_bits(mfd, reg, TPS65912_REG_ENABLED);
430}
431
432static int tps65912_reg_disable(struct regulator_dev *dev)
433{
434 struct tps65912_reg *pmic = rdev_get_drvdata(dev);
435 struct tps65912 *mfd = pmic->mfd;
436 int id = rdev_get_id(dev), reg;
437
438 reg = pmic->get_ctrl_reg(id);
439 if (reg < 0)
440 return reg;
441
442 return tps65912_clear_bits(mfd, reg, TPS65912_REG_ENABLED);
443}
444
445static int tps65912_set_mode(struct regulator_dev *dev, unsigned int mode)
446{
447 struct tps65912_reg *pmic = rdev_get_drvdata(dev);
448 struct tps65912 *mfd = pmic->mfd;
449 int pwm_mode, eco, id = rdev_get_id(dev);
450
451 tps65912_get_mode_regiters(pmic, id);
452
453 pwm_mode = tps65912_reg_read(mfd, pmic->pwm_mode_reg);
454 eco = tps65912_reg_read(mfd, pmic->eco_reg);
455
456 pwm_mode &= DCDCCTRL_DCDC_MODE_MASK;
457 eco &= DCDC_AVS_ECO_MASK;
458
459 switch (mode) {
460 case REGULATOR_MODE_FAST:
461 /* Verify if mode alredy set */
462 if (pwm_mode && !eco)
463 break;
464 tps65912_set_bits(mfd, pmic->pwm_mode_reg, DCDCCTRL_DCDC_MODE_MASK);
465 tps65912_clear_bits(mfd, pmic->eco_reg, DCDC_AVS_ECO_MASK);
466 break;
467 case REGULATOR_MODE_NORMAL:
468 case REGULATOR_MODE_IDLE:
469 if (!pwm_mode && !eco)
470 break;
471 tps65912_clear_bits(mfd, pmic->pwm_mode_reg, DCDCCTRL_DCDC_MODE_MASK);
472 tps65912_clear_bits(mfd, pmic->eco_reg, DCDC_AVS_ECO_MASK);
473 break;
474 case REGULATOR_MODE_STANDBY:
475 if (!pwm_mode && eco)
476 break;
477 tps65912_clear_bits(mfd, pmic->pwm_mode_reg, DCDCCTRL_DCDC_MODE_MASK);
478 tps65912_set_bits(mfd, pmic->eco_reg, DCDC_AVS_ECO_MASK);
479 break;
480 default:
481 return -EINVAL;
482 }
483
484 return 0;
485}
486
487static unsigned int tps65912_get_mode(struct regulator_dev *dev)
488{
489 struct tps65912_reg *pmic = rdev_get_drvdata(dev);
490 struct tps65912 *mfd = pmic->mfd;
491 int pwm_mode, eco, mode = 0, id = rdev_get_id(dev);
492
493 tps65912_get_mode_regiters(pmic, id);
494
495 pwm_mode = tps65912_reg_read(mfd, pmic->pwm_mode_reg);
496 eco = tps65912_reg_read(mfd, pmic->eco_reg);
497
498 pwm_mode &= DCDCCTRL_DCDC_MODE_MASK;
499 eco &= DCDC_AVS_ECO_MASK;
500
501 if (pwm_mode && !eco)
502 mode = REGULATOR_MODE_FAST;
503 else if (!pwm_mode && !eco)
504 mode = REGULATOR_MODE_NORMAL;
505 else if (!pwm_mode && eco)
506 mode = REGULATOR_MODE_STANDBY;
507
508 return mode;
509}
510
511static int tps65912_get_voltage_dcdc(struct regulator_dev *dev)
512{
513 struct tps65912_reg *pmic = rdev_get_drvdata(dev);
514 struct tps65912 *mfd = pmic->mfd;
515 int id = rdev_get_id(dev), voltage = 0, range;
516 int opvsel = 0, avsel = 0, sr, vsel;
517
518 switch (id) {
519 case TPS65912_REG_DCDC1:
520 opvsel = tps65912_reg_read(mfd, TPS65912_DCDC1_OP);
521 avsel = tps65912_reg_read(mfd, TPS65912_DCDC1_AVS);
522 range = pmic->dcdc1_range;
523 break;
524 case TPS65912_REG_DCDC2:
525 opvsel = tps65912_reg_read(mfd, TPS65912_DCDC2_OP);
526 avsel = tps65912_reg_read(mfd, TPS65912_DCDC2_AVS);
527 range = pmic->dcdc2_range;
528 break;
529 case TPS65912_REG_DCDC3:
530 opvsel = tps65912_reg_read(mfd, TPS65912_DCDC3_OP);
531 avsel = tps65912_reg_read(mfd, TPS65912_DCDC3_AVS);
532 range = pmic->dcdc3_range;
533 break;
534 case TPS65912_REG_DCDC4:
535 opvsel = tps65912_reg_read(mfd, TPS65912_DCDC4_OP);
536 avsel = tps65912_reg_read(mfd, TPS65912_DCDC4_AVS);
537 range = pmic->dcdc4_range;
538 break;
539 default:
540 return -EINVAL;
541 }
542
543 sr = (opvsel & OP_SELREG_MASK) >> OP_SELREG_SHIFT;
544 if (sr)
545 vsel = avsel;
546 else
547 vsel = opvsel;
548 vsel &= 0x3F;
549
550 switch (range) {
551 case 0:
552 /* 0.5 - 1.2875V in 12.5mV steps */
553 voltage = tps65912_vsel_to_uv_range0(vsel);
554 break;
555 case 1:
556 /* 0.7 - 1.4875V in 12.5mV steps */
557 voltage = tps65912_vsel_to_uv_range1(vsel);
558 break;
559 case 2:
560 /* 0.5 - 2.075V in 25mV steps */
561 voltage = tps65912_vsel_to_uv_range2(vsel);
562 break;
563 case 3:
564 /* 0.5 - 3.8V in 50mV steps */
565 voltage = tps65912_vsel_to_uv_range3(vsel);
566 break;
567 }
568 return voltage;
569}
570
571static int tps65912_set_voltage_dcdc(struct regulator_dev *dev,
572 unsigned selector)
573{
574 struct tps65912_reg *pmic = rdev_get_drvdata(dev);
575 struct tps65912 *mfd = pmic->mfd;
576 int id = rdev_get_id(dev);
577 int value;
578 u8 reg;
579
580 reg = tps65912_get_dcdc_sel_register(pmic, id);
581 value = tps65912_reg_read(mfd, reg);
582 value &= 0xC0;
583 return tps65912_reg_write(mfd, reg, selector | value);
584}
585
586static int tps65912_get_voltage_ldo(struct regulator_dev *dev)
587{
588 struct tps65912_reg *pmic = rdev_get_drvdata(dev);
589 struct tps65912 *mfd = pmic->mfd;
590 int id = rdev_get_id(dev);
591 int vsel = 0;
592 u8 reg;
593
594 reg = tps65912_get_ldo_sel_register(pmic, id);
595 vsel = tps65912_reg_read(mfd, reg);
596 vsel &= 0x3F;
597
598 return tps65912_vsel_to_uv_ldo(vsel);
599}
600
601static int tps65912_set_voltage_ldo(struct regulator_dev *dev,
602 unsigned selector)
603{
604 struct tps65912_reg *pmic = rdev_get_drvdata(dev);
605 struct tps65912 *mfd = pmic->mfd;
606 int id = rdev_get_id(dev), reg, value;
607
608 reg = tps65912_get_ldo_sel_register(pmic, id);
609 value = tps65912_reg_read(mfd, reg);
610 value &= 0xC0;
611 return tps65912_reg_write(mfd, reg, selector | value);
612}
613
614static int tps65912_list_voltage_dcdc(struct regulator_dev *dev,
615 unsigned selector)
616{
617 struct tps65912_reg *pmic = rdev_get_drvdata(dev);
618 int range, voltage = 0, id = rdev_get_id(dev);
619
620 switch (id) {
621 case TPS65912_REG_DCDC1:
622 range = pmic->dcdc1_range;
623 break;
624 case TPS65912_REG_DCDC2:
625 range = pmic->dcdc2_range;
626 break;
627 case TPS65912_REG_DCDC3:
628 range = pmic->dcdc3_range;
629 break;
630 case TPS65912_REG_DCDC4:
631 range = pmic->dcdc4_range;
632 break;
633 default:
634 return -EINVAL;
635 }
636
637 switch (range) {
638 case 0:
639 /* 0.5 - 1.2875V in 12.5mV steps */
640 voltage = tps65912_vsel_to_uv_range0(selector);
641 break;
642 case 1:
643 /* 0.7 - 1.4875V in 12.5mV steps */
644 voltage = tps65912_vsel_to_uv_range1(selector);
645 break;
646 case 2:
647 /* 0.5 - 2.075V in 25mV steps */
648 voltage = tps65912_vsel_to_uv_range2(selector);
649 break;
650 case 3:
651 /* 0.5 - 3.8V in 50mV steps */
652 voltage = tps65912_vsel_to_uv_range3(selector);
653 break;
654 }
655 return voltage;
656}
657
658static int tps65912_list_voltage_ldo(struct regulator_dev *dev,
659 unsigned selector)
660{
661 int ldo = rdev_get_id(dev);
662
663 if (ldo < TPS65912_REG_LDO1 || ldo > TPS65912_REG_LDO10)
664 return -EINVAL;
665
666 return tps65912_vsel_to_uv_ldo(selector);
667}
668
669/* Operations permitted on DCDCx */
670static struct regulator_ops tps65912_ops_dcdc = {
671 .is_enabled = tps65912_reg_is_enabled,
672 .enable = tps65912_reg_enable,
673 .disable = tps65912_reg_disable,
674 .set_mode = tps65912_set_mode,
675 .get_mode = tps65912_get_mode,
676 .get_voltage = tps65912_get_voltage_dcdc,
677 .set_voltage_sel = tps65912_set_voltage_dcdc,
678 .list_voltage = tps65912_list_voltage_dcdc,
679};
680
681/* Operations permitted on LDOx */
682static struct regulator_ops tps65912_ops_ldo = {
683 .is_enabled = tps65912_reg_is_enabled,
684 .enable = tps65912_reg_enable,
685 .disable = tps65912_reg_disable,
686 .get_voltage = tps65912_get_voltage_ldo,
687 .set_voltage_sel = tps65912_set_voltage_ldo,
688 .list_voltage = tps65912_list_voltage_ldo,
689};
690
691static __devinit int tps65912_probe(struct platform_device *pdev)
692{
693 struct tps65912 *tps65912 = dev_get_drvdata(pdev->dev.parent);
694 struct tps_info *info;
695 struct regulator_init_data *reg_data;
696 struct regulator_dev *rdev;
697 struct tps65912_reg *pmic;
698 struct tps65912_board *pmic_plat_data;
699 int i, err;
700
701 pmic_plat_data = dev_get_platdata(tps65912->dev);
702 if (!pmic_plat_data)
703 return -EINVAL;
704
705 reg_data = pmic_plat_data->tps65912_pmic_init_data;
706
707 pmic = kzalloc(sizeof(*pmic), GFP_KERNEL);
708 if (!pmic)
709 return -ENOMEM;
710
711 mutex_init(&pmic->io_lock);
712 pmic->mfd = tps65912;
713 platform_set_drvdata(pdev, pmic);
714
715 pmic->get_ctrl_reg = &tps65912_get_ctrl_register;
716 info = tps65912_regs;
717
718 for (i = 0; i < TPS65912_NUM_REGULATOR; i++, info++, reg_data++) {
719 int range = 0;
720 /* Register the regulators */
721 pmic->info[i] = info;
722
723 pmic->desc[i].name = info->name;
724 pmic->desc[i].id = i;
725 pmic->desc[i].n_voltages = 64;
726 pmic->desc[i].ops = (i > TPS65912_REG_DCDC4 ?
727 &tps65912_ops_ldo : &tps65912_ops_dcdc);
728 pmic->desc[i].type = REGULATOR_VOLTAGE;
729 pmic->desc[i].owner = THIS_MODULE;
730 range = tps65912_get_range(pmic, i);
731 rdev = regulator_register(&pmic->desc[i],
732 tps65912->dev, reg_data, pmic);
733 if (IS_ERR(rdev)) {
734 dev_err(tps65912->dev,
735 "failed to register %s regulator\n",
736 pdev->name);
737 err = PTR_ERR(rdev);
738 goto err;
739 }
740
741 /* Save regulator for cleanup */
742 pmic->rdev[i] = rdev;
743 }
744 return 0;
745
746err:
747 while (--i >= 0)
748 regulator_unregister(pmic->rdev[i]);
749
750 kfree(pmic);
751 return err;
752}
753
754static int __devexit tps65912_remove(struct platform_device *pdev)
755{
756 struct tps65912_reg *tps65912_reg = platform_get_drvdata(pdev);
757 int i;
758
759 for (i = 0; i < TPS65912_NUM_REGULATOR; i++)
760 regulator_unregister(tps65912_reg->rdev[i]);
761
762 kfree(tps65912_reg);
763 return 0;
764}
765
766static struct platform_driver tps65912_driver = {
767 .driver = {
768 .name = "tps65912-pmic",
769 .owner = THIS_MODULE,
770 },
771 .probe = tps65912_probe,
772 .remove = __devexit_p(tps65912_remove),
773};
774
775/**
776 * tps65912_init
777 *
778 * Module init function
779 */
780static int __init tps65912_init(void)
781{
782 return platform_driver_register(&tps65912_driver);
783}
784subsys_initcall(tps65912_init);
785
786/**
787 * tps65912_cleanup
788 *
789 * Module exit function
790 */
791static void __exit tps65912_cleanup(void)
792{
793 platform_driver_unregister(&tps65912_driver);
794}
795module_exit(tps65912_cleanup);
796
797MODULE_AUTHOR("Margarita Olaya Cabrera <magi@slimlogic.co.uk>");
798MODULE_DESCRIPTION("TPS65912 voltage regulator driver");
799MODULE_LICENSE("GPL v2");
800MODULE_ALIAS("platform:tps65912-pmic");
1/*
2 * tps65912.c -- TI tps65912
3 *
4 * Copyright 2011 Texas Instruments Inc.
5 *
6 * Author: Margarita Olaya Cabrera <magi@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 * This driver is based on wm8350 implementation.
14 */
15
16#include <linux/kernel.h>
17#include <linux/module.h>
18#include <linux/init.h>
19#include <linux/err.h>
20#include <linux/platform_device.h>
21#include <linux/regulator/driver.h>
22#include <linux/regulator/machine.h>
23#include <linux/slab.h>
24#include <linux/gpio.h>
25#include <linux/mfd/tps65912.h>
26
27/* DCDC's */
28#define TPS65912_REG_DCDC1 0
29#define TPS65912_REG_DCDC2 1
30#define TPS65912_REG_DCDC3 2
31#define TPS65912_REG_DCDC4 3
32
33/* LDOs */
34#define TPS65912_REG_LDO1 4
35#define TPS65912_REG_LDO2 5
36#define TPS65912_REG_LDO3 6
37#define TPS65912_REG_LDO4 7
38#define TPS65912_REG_LDO5 8
39#define TPS65912_REG_LDO6 9
40#define TPS65912_REG_LDO7 10
41#define TPS65912_REG_LDO8 11
42#define TPS65912_REG_LDO9 12
43#define TPS65912_REG_LDO10 13
44
45/* Number of step-down converters available */
46#define TPS65912_NUM_DCDC 4
47
48/* Number of LDO voltage regulators available */
49#define TPS65912_NUM_LDO 10
50
51/* Number of total regulators available */
52#define TPS65912_NUM_REGULATOR (TPS65912_NUM_DCDC + TPS65912_NUM_LDO)
53
54#define TPS65912_REG_ENABLED 0x80
55#define OP_SELREG_MASK 0x40
56#define OP_SELREG_SHIFT 6
57
58struct tps_info {
59 const char *name;
60};
61
62static struct tps_info tps65912_regs[] = {
63 {
64 .name = "DCDC1",
65 },
66 {
67 .name = "DCDC2",
68 },
69 {
70 .name = "DCDC3",
71 },
72 {
73 .name = "DCDC4",
74 },
75 {
76 .name = "LDO1",
77 },
78 {
79 .name = "LDO2",
80 },
81 {
82 .name = "LDO3",
83 },
84 {
85 .name = "LDO4",
86 },
87 {
88 .name = "LDO5",
89 },
90 {
91 .name = "LDO6",
92 },
93 {
94 .name = "LDO7",
95 },
96 {
97 .name = "LDO8",
98 },
99 {
100 .name = "LDO9",
101 },
102 {
103 .name = "LDO10",
104 },
105};
106
107struct tps65912_reg {
108 struct regulator_desc desc[TPS65912_NUM_REGULATOR];
109 struct tps65912 *mfd;
110 struct regulator_dev *rdev[TPS65912_NUM_REGULATOR];
111 struct tps_info *info[TPS65912_NUM_REGULATOR];
112 /* for read/write access */
113 struct mutex io_lock;
114 int mode;
115 int (*get_ctrl_reg)(int);
116 int dcdc_range[TPS65912_NUM_DCDC];
117 int pwm_mode_reg;
118 int eco_reg;
119};
120
121static int tps65912_get_range(struct tps65912_reg *pmic, int id)
122{
123 struct tps65912 *mfd = pmic->mfd;
124 int range;
125
126 switch (id) {
127 case TPS65912_REG_DCDC1:
128 range = tps65912_reg_read(mfd, TPS65912_DCDC1_LIMIT);
129 break;
130 case TPS65912_REG_DCDC2:
131 range = tps65912_reg_read(mfd, TPS65912_DCDC2_LIMIT);
132 break;
133 case TPS65912_REG_DCDC3:
134 range = tps65912_reg_read(mfd, TPS65912_DCDC3_LIMIT);
135 break;
136 case TPS65912_REG_DCDC4:
137 range = tps65912_reg_read(mfd, TPS65912_DCDC4_LIMIT);
138 break;
139 default:
140 return 0;
141 }
142
143 if (range >= 0)
144 range = (range & DCDC_LIMIT_RANGE_MASK)
145 >> DCDC_LIMIT_RANGE_SHIFT;
146
147 pmic->dcdc_range[id] = range;
148 return range;
149}
150
151static unsigned long tps65912_vsel_to_uv_range0(u8 vsel)
152{
153 unsigned long uv;
154
155 uv = ((vsel * 12500) + 500000);
156 return uv;
157}
158
159static unsigned long tps65912_vsel_to_uv_range1(u8 vsel)
160{
161 unsigned long uv;
162
163 uv = ((vsel * 12500) + 700000);
164 return uv;
165}
166
167static unsigned long tps65912_vsel_to_uv_range2(u8 vsel)
168{
169 unsigned long uv;
170
171 uv = ((vsel * 25000) + 500000);
172 return uv;
173}
174
175static unsigned long tps65912_vsel_to_uv_range3(u8 vsel)
176{
177 unsigned long uv;
178
179 if (vsel == 0x3f)
180 uv = 3800000;
181 else
182 uv = ((vsel * 50000) + 500000);
183
184 return uv;
185}
186
187static unsigned long tps65912_vsel_to_uv_ldo(u8 vsel)
188{
189 unsigned long uv = 0;
190
191 if (vsel <= 32)
192 uv = ((vsel * 25000) + 800000);
193 else if (vsel > 32 && vsel <= 60)
194 uv = (((vsel - 32) * 50000) + 1600000);
195 else if (vsel > 60)
196 uv = (((vsel - 60) * 100000) + 3000000);
197
198 return uv;
199}
200
201static int tps65912_get_ctrl_register(int id)
202{
203 if (id >= TPS65912_REG_DCDC1 && id <= TPS65912_REG_LDO4)
204 return id * 3 + TPS65912_DCDC1_AVS;
205 else if (id >= TPS65912_REG_LDO5 && id <= TPS65912_REG_LDO10)
206 return id - TPS65912_REG_LDO5 + TPS65912_LDO5;
207 else
208 return -EINVAL;
209}
210
211static int tps65912_get_sel_register(struct tps65912_reg *pmic, int id)
212{
213 struct tps65912 *mfd = pmic->mfd;
214 int opvsel;
215 u8 reg = 0;
216
217 if (id >= TPS65912_REG_DCDC1 && id <= TPS65912_REG_LDO4) {
218 opvsel = tps65912_reg_read(mfd, id * 3 + TPS65912_DCDC1_OP);
219 if (opvsel & OP_SELREG_MASK)
220 reg = id * 3 + TPS65912_DCDC1_AVS;
221 else
222 reg = id * 3 + TPS65912_DCDC1_OP;
223 } else if (id >= TPS65912_REG_LDO5 && id <= TPS65912_REG_LDO10) {
224 reg = id - TPS65912_REG_LDO5 + TPS65912_LDO5;
225 } else {
226 return -EINVAL;
227 }
228
229 return reg;
230}
231
232static int tps65912_get_mode_regiters(struct tps65912_reg *pmic, int id)
233{
234 switch (id) {
235 case TPS65912_REG_DCDC1:
236 pmic->pwm_mode_reg = TPS65912_DCDC1_CTRL;
237 pmic->eco_reg = TPS65912_DCDC1_AVS;
238 break;
239 case TPS65912_REG_DCDC2:
240 pmic->pwm_mode_reg = TPS65912_DCDC2_CTRL;
241 pmic->eco_reg = TPS65912_DCDC2_AVS;
242 break;
243 case TPS65912_REG_DCDC3:
244 pmic->pwm_mode_reg = TPS65912_DCDC3_CTRL;
245 pmic->eco_reg = TPS65912_DCDC3_AVS;
246 break;
247 case TPS65912_REG_DCDC4:
248 pmic->pwm_mode_reg = TPS65912_DCDC4_CTRL;
249 pmic->eco_reg = TPS65912_DCDC4_AVS;
250 break;
251 default:
252 return -EINVAL;
253 }
254
255 return 0;
256}
257
258static int tps65912_reg_is_enabled(struct regulator_dev *dev)
259{
260 struct tps65912_reg *pmic = rdev_get_drvdata(dev);
261 struct tps65912 *mfd = pmic->mfd;
262 int reg, value, id = rdev_get_id(dev);
263
264 if (id < TPS65912_REG_DCDC1 || id > TPS65912_REG_LDO10)
265 return -EINVAL;
266
267 reg = pmic->get_ctrl_reg(id);
268 if (reg < 0)
269 return reg;
270
271 value = tps65912_reg_read(mfd, reg);
272 if (value < 0)
273 return value;
274
275 return value & TPS65912_REG_ENABLED;
276}
277
278static int tps65912_reg_enable(struct regulator_dev *dev)
279{
280 struct tps65912_reg *pmic = rdev_get_drvdata(dev);
281 struct tps65912 *mfd = pmic->mfd;
282 int id = rdev_get_id(dev);
283 int reg;
284
285 if (id < TPS65912_REG_DCDC1 || id > TPS65912_REG_LDO10)
286 return -EINVAL;
287
288 reg = pmic->get_ctrl_reg(id);
289 if (reg < 0)
290 return reg;
291
292 return tps65912_set_bits(mfd, reg, TPS65912_REG_ENABLED);
293}
294
295static int tps65912_reg_disable(struct regulator_dev *dev)
296{
297 struct tps65912_reg *pmic = rdev_get_drvdata(dev);
298 struct tps65912 *mfd = pmic->mfd;
299 int id = rdev_get_id(dev), reg;
300
301 reg = pmic->get_ctrl_reg(id);
302 if (reg < 0)
303 return reg;
304
305 return tps65912_clear_bits(mfd, reg, TPS65912_REG_ENABLED);
306}
307
308static int tps65912_set_mode(struct regulator_dev *dev, unsigned int mode)
309{
310 struct tps65912_reg *pmic = rdev_get_drvdata(dev);
311 struct tps65912 *mfd = pmic->mfd;
312 int pwm_mode, eco, id = rdev_get_id(dev);
313
314 tps65912_get_mode_regiters(pmic, id);
315
316 pwm_mode = tps65912_reg_read(mfd, pmic->pwm_mode_reg);
317 eco = tps65912_reg_read(mfd, pmic->eco_reg);
318
319 pwm_mode &= DCDCCTRL_DCDC_MODE_MASK;
320 eco &= DCDC_AVS_ECO_MASK;
321
322 switch (mode) {
323 case REGULATOR_MODE_FAST:
324 /* Verify if mode alredy set */
325 if (pwm_mode && !eco)
326 break;
327 tps65912_set_bits(mfd, pmic->pwm_mode_reg, DCDCCTRL_DCDC_MODE_MASK);
328 tps65912_clear_bits(mfd, pmic->eco_reg, DCDC_AVS_ECO_MASK);
329 break;
330 case REGULATOR_MODE_NORMAL:
331 case REGULATOR_MODE_IDLE:
332 if (!pwm_mode && !eco)
333 break;
334 tps65912_clear_bits(mfd, pmic->pwm_mode_reg, DCDCCTRL_DCDC_MODE_MASK);
335 tps65912_clear_bits(mfd, pmic->eco_reg, DCDC_AVS_ECO_MASK);
336 break;
337 case REGULATOR_MODE_STANDBY:
338 if (!pwm_mode && eco)
339 break;
340 tps65912_clear_bits(mfd, pmic->pwm_mode_reg, DCDCCTRL_DCDC_MODE_MASK);
341 tps65912_set_bits(mfd, pmic->eco_reg, DCDC_AVS_ECO_MASK);
342 break;
343 default:
344 return -EINVAL;
345 }
346
347 return 0;
348}
349
350static unsigned int tps65912_get_mode(struct regulator_dev *dev)
351{
352 struct tps65912_reg *pmic = rdev_get_drvdata(dev);
353 struct tps65912 *mfd = pmic->mfd;
354 int pwm_mode, eco, mode = 0, id = rdev_get_id(dev);
355
356 tps65912_get_mode_regiters(pmic, id);
357
358 pwm_mode = tps65912_reg_read(mfd, pmic->pwm_mode_reg);
359 eco = tps65912_reg_read(mfd, pmic->eco_reg);
360
361 pwm_mode &= DCDCCTRL_DCDC_MODE_MASK;
362 eco &= DCDC_AVS_ECO_MASK;
363
364 if (pwm_mode && !eco)
365 mode = REGULATOR_MODE_FAST;
366 else if (!pwm_mode && !eco)
367 mode = REGULATOR_MODE_NORMAL;
368 else if (!pwm_mode && eco)
369 mode = REGULATOR_MODE_STANDBY;
370
371 return mode;
372}
373
374static int tps65912_list_voltage(struct regulator_dev *dev, unsigned selector)
375{
376 struct tps65912_reg *pmic = rdev_get_drvdata(dev);
377 int range, voltage = 0, id = rdev_get_id(dev);
378
379 if (id >= TPS65912_REG_LDO1 && id <= TPS65912_REG_LDO10)
380 return tps65912_vsel_to_uv_ldo(selector);
381
382 if (id > TPS65912_REG_DCDC4)
383 return -EINVAL;
384
385 range = pmic->dcdc_range[id];
386
387 switch (range) {
388 case 0:
389 /* 0.5 - 1.2875V in 12.5mV steps */
390 voltage = tps65912_vsel_to_uv_range0(selector);
391 break;
392 case 1:
393 /* 0.7 - 1.4875V in 12.5mV steps */
394 voltage = tps65912_vsel_to_uv_range1(selector);
395 break;
396 case 2:
397 /* 0.5 - 2.075V in 25mV steps */
398 voltage = tps65912_vsel_to_uv_range2(selector);
399 break;
400 case 3:
401 /* 0.5 - 3.8V in 50mV steps */
402 voltage = tps65912_vsel_to_uv_range3(selector);
403 break;
404 }
405 return voltage;
406}
407
408static int tps65912_get_voltage_sel(struct regulator_dev *dev)
409{
410 struct tps65912_reg *pmic = rdev_get_drvdata(dev);
411 struct tps65912 *mfd = pmic->mfd;
412 int id = rdev_get_id(dev);
413 int reg, vsel;
414
415 reg = tps65912_get_sel_register(pmic, id);
416 if (reg < 0)
417 return reg;
418
419 vsel = tps65912_reg_read(mfd, reg);
420 vsel &= 0x3F;
421
422 return vsel;
423}
424
425static int tps65912_set_voltage_sel(struct regulator_dev *dev,
426 unsigned selector)
427{
428 struct tps65912_reg *pmic = rdev_get_drvdata(dev);
429 struct tps65912 *mfd = pmic->mfd;
430 int id = rdev_get_id(dev);
431 int value;
432 u8 reg;
433
434 reg = tps65912_get_sel_register(pmic, id);
435 value = tps65912_reg_read(mfd, reg);
436 value &= 0xC0;
437 return tps65912_reg_write(mfd, reg, selector | value);
438}
439
440/* Operations permitted on DCDCx */
441static struct regulator_ops tps65912_ops_dcdc = {
442 .is_enabled = tps65912_reg_is_enabled,
443 .enable = tps65912_reg_enable,
444 .disable = tps65912_reg_disable,
445 .set_mode = tps65912_set_mode,
446 .get_mode = tps65912_get_mode,
447 .get_voltage_sel = tps65912_get_voltage_sel,
448 .set_voltage_sel = tps65912_set_voltage_sel,
449 .list_voltage = tps65912_list_voltage,
450};
451
452/* Operations permitted on LDOx */
453static struct regulator_ops tps65912_ops_ldo = {
454 .is_enabled = tps65912_reg_is_enabled,
455 .enable = tps65912_reg_enable,
456 .disable = tps65912_reg_disable,
457 .get_voltage_sel = tps65912_get_voltage_sel,
458 .set_voltage_sel = tps65912_set_voltage_sel,
459 .list_voltage = tps65912_list_voltage,
460};
461
462static __devinit int tps65912_probe(struct platform_device *pdev)
463{
464 struct tps65912 *tps65912 = dev_get_drvdata(pdev->dev.parent);
465 struct regulator_config config = { };
466 struct tps_info *info;
467 struct regulator_init_data *reg_data;
468 struct regulator_dev *rdev;
469 struct tps65912_reg *pmic;
470 struct tps65912_board *pmic_plat_data;
471 int i, err;
472
473 pmic_plat_data = dev_get_platdata(tps65912->dev);
474 if (!pmic_plat_data)
475 return -EINVAL;
476
477 reg_data = pmic_plat_data->tps65912_pmic_init_data;
478
479 pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
480 if (!pmic)
481 return -ENOMEM;
482
483 mutex_init(&pmic->io_lock);
484 pmic->mfd = tps65912;
485 platform_set_drvdata(pdev, pmic);
486
487 pmic->get_ctrl_reg = &tps65912_get_ctrl_register;
488 info = tps65912_regs;
489
490 for (i = 0; i < TPS65912_NUM_REGULATOR; i++, info++, reg_data++) {
491 int range = 0;
492 /* Register the regulators */
493 pmic->info[i] = info;
494
495 pmic->desc[i].name = info->name;
496 pmic->desc[i].id = i;
497 pmic->desc[i].n_voltages = 64;
498 pmic->desc[i].ops = (i > TPS65912_REG_DCDC4 ?
499 &tps65912_ops_ldo : &tps65912_ops_dcdc);
500 pmic->desc[i].type = REGULATOR_VOLTAGE;
501 pmic->desc[i].owner = THIS_MODULE;
502 range = tps65912_get_range(pmic, i);
503
504 config.dev = tps65912->dev;
505 config.init_data = reg_data;
506 config.driver_data = pmic;
507
508 rdev = regulator_register(&pmic->desc[i], &config);
509 if (IS_ERR(rdev)) {
510 dev_err(tps65912->dev,
511 "failed to register %s regulator\n",
512 pdev->name);
513 err = PTR_ERR(rdev);
514 goto err;
515 }
516
517 /* Save regulator for cleanup */
518 pmic->rdev[i] = rdev;
519 }
520 return 0;
521
522err:
523 while (--i >= 0)
524 regulator_unregister(pmic->rdev[i]);
525 return err;
526}
527
528static int __devexit tps65912_remove(struct platform_device *pdev)
529{
530 struct tps65912_reg *tps65912_reg = platform_get_drvdata(pdev);
531 int i;
532
533 for (i = 0; i < TPS65912_NUM_REGULATOR; i++)
534 regulator_unregister(tps65912_reg->rdev[i]);
535 return 0;
536}
537
538static struct platform_driver tps65912_driver = {
539 .driver = {
540 .name = "tps65912-pmic",
541 .owner = THIS_MODULE,
542 },
543 .probe = tps65912_probe,
544 .remove = __devexit_p(tps65912_remove),
545};
546
547static int __init tps65912_init(void)
548{
549 return platform_driver_register(&tps65912_driver);
550}
551subsys_initcall(tps65912_init);
552
553static void __exit tps65912_cleanup(void)
554{
555 platform_driver_unregister(&tps65912_driver);
556}
557module_exit(tps65912_cleanup);
558
559MODULE_AUTHOR("Margarita Olaya Cabrera <magi@slimlogic.co.uk>");
560MODULE_DESCRIPTION("TPS65912 voltage regulator driver");
561MODULE_LICENSE("GPL v2");
562MODULE_ALIAS("platform:tps65912-pmic");