Loading...
1/*
2 * twl-regulator.c -- support regulators in twl4030/twl6030 family chips
3 *
4 * Copyright (C) 2008 David Brownell
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 */
11
12#include <linux/module.h>
13#include <linux/string.h>
14#include <linux/slab.h>
15#include <linux/init.h>
16#include <linux/err.h>
17#include <linux/platform_device.h>
18#include <linux/of.h>
19#include <linux/of_device.h>
20#include <linux/regulator/driver.h>
21#include <linux/regulator/machine.h>
22#include <linux/regulator/of_regulator.h>
23#include <linux/i2c/twl.h>
24
25
26/*
27 * The TWL4030/TW5030/TPS659x0/TWL6030 family chips include power management, a
28 * USB OTG transceiver, an RTC, ADC, PWM, and lots more. Some versions
29 * include an audio codec, battery charger, and more voltage regulators.
30 * These chips are often used in OMAP-based systems.
31 *
32 * This driver implements software-based resource control for various
33 * voltage regulators. This is usually augmented with state machine
34 * based control.
35 */
36
37struct twlreg_info {
38 /* start of regulator's PM_RECEIVER control register bank */
39 u8 base;
40
41 /* twl resource ID, for resource control state machine */
42 u8 id;
43
44 /* voltage in mV = table[VSEL]; table_len must be a power-of-two */
45 u8 table_len;
46 const u16 *table;
47
48 /* State REMAP default configuration */
49 u8 remap;
50
51 /* chip constraints on regulator behavior */
52 u16 min_mV;
53 u16 max_mV;
54
55 u8 flags;
56
57 /* used by regulator core */
58 struct regulator_desc desc;
59
60 /* chip specific features */
61 unsigned long features;
62
63 /*
64 * optional override functions for voltage set/get
65 * these are currently only used for SMPS regulators
66 */
67 int (*get_voltage)(void *data);
68 int (*set_voltage)(void *data, int target_uV);
69
70 /* data passed from board for external get/set voltage */
71 void *data;
72};
73
74
75/* LDO control registers ... offset is from the base of its register bank.
76 * The first three registers of all power resource banks help hardware to
77 * manage the various resource groups.
78 */
79/* Common offset in TWL4030/6030 */
80#define VREG_GRP 0
81/* TWL4030 register offsets */
82#define VREG_TYPE 1
83#define VREG_REMAP 2
84#define VREG_DEDICATED 3 /* LDO control */
85#define VREG_VOLTAGE_SMPS_4030 9
86/* TWL6030 register offsets */
87#define VREG_TRANS 1
88#define VREG_STATE 2
89#define VREG_VOLTAGE 3
90#define VREG_VOLTAGE_SMPS 4
91/* TWL6030 Misc register offsets */
92#define VREG_BC_ALL 1
93#define VREG_BC_REF 2
94#define VREG_BC_PROC 3
95#define VREG_BC_CLK_RST 4
96
97/* TWL6030 LDO register values for CFG_STATE */
98#define TWL6030_CFG_STATE_OFF 0x00
99#define TWL6030_CFG_STATE_ON 0x01
100#define TWL6030_CFG_STATE_OFF2 0x02
101#define TWL6030_CFG_STATE_SLEEP 0x03
102#define TWL6030_CFG_STATE_GRP_SHIFT 5
103#define TWL6030_CFG_STATE_APP_SHIFT 2
104#define TWL6030_CFG_STATE_APP_MASK (0x03 << TWL6030_CFG_STATE_APP_SHIFT)
105#define TWL6030_CFG_STATE_APP(v) (((v) & TWL6030_CFG_STATE_APP_MASK) >>\
106 TWL6030_CFG_STATE_APP_SHIFT)
107
108/* Flags for SMPS Voltage reading */
109#define SMPS_OFFSET_EN BIT(0)
110#define SMPS_EXTENDED_EN BIT(1)
111
112/* twl6032 SMPS EPROM values */
113#define TWL6030_SMPS_OFFSET 0xB0
114#define TWL6030_SMPS_MULT 0xB3
115#define SMPS_MULTOFFSET_SMPS4 BIT(0)
116#define SMPS_MULTOFFSET_VIO BIT(1)
117#define SMPS_MULTOFFSET_SMPS3 BIT(6)
118
119static inline int
120twlreg_read(struct twlreg_info *info, unsigned slave_subgp, unsigned offset)
121{
122 u8 value;
123 int status;
124
125 status = twl_i2c_read_u8(slave_subgp,
126 &value, info->base + offset);
127 return (status < 0) ? status : value;
128}
129
130static inline int
131twlreg_write(struct twlreg_info *info, unsigned slave_subgp, unsigned offset,
132 u8 value)
133{
134 return twl_i2c_write_u8(slave_subgp,
135 value, info->base + offset);
136}
137
138/*----------------------------------------------------------------------*/
139
140/* generic power resource operations, which work on all regulators */
141
142static int twlreg_grp(struct regulator_dev *rdev)
143{
144 return twlreg_read(rdev_get_drvdata(rdev), TWL_MODULE_PM_RECEIVER,
145 VREG_GRP);
146}
147
148/*
149 * Enable/disable regulators by joining/leaving the P1 (processor) group.
150 * We assume nobody else is updating the DEV_GRP registers.
151 */
152/* definition for 4030 family */
153#define P3_GRP_4030 BIT(7) /* "peripherals" */
154#define P2_GRP_4030 BIT(6) /* secondary processor, modem, etc */
155#define P1_GRP_4030 BIT(5) /* CPU/Linux */
156/* definition for 6030 family */
157#define P3_GRP_6030 BIT(2) /* secondary processor, modem, etc */
158#define P2_GRP_6030 BIT(1) /* "peripherals" */
159#define P1_GRP_6030 BIT(0) /* CPU/Linux */
160
161static int twl4030reg_is_enabled(struct regulator_dev *rdev)
162{
163 int state = twlreg_grp(rdev);
164
165 if (state < 0)
166 return state;
167
168 return state & P1_GRP_4030;
169}
170
171static int twl6030reg_is_enabled(struct regulator_dev *rdev)
172{
173 struct twlreg_info *info = rdev_get_drvdata(rdev);
174 int grp = 0, val;
175
176 if (!(twl_class_is_6030() && (info->features & TWL6032_SUBCLASS))) {
177 grp = twlreg_grp(rdev);
178 if (grp < 0)
179 return grp;
180 grp &= P1_GRP_6030;
181 } else {
182 grp = 1;
183 }
184
185 val = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_STATE);
186 val = TWL6030_CFG_STATE_APP(val);
187
188 return grp && (val == TWL6030_CFG_STATE_ON);
189}
190
191static int twl4030reg_enable(struct regulator_dev *rdev)
192{
193 struct twlreg_info *info = rdev_get_drvdata(rdev);
194 int grp;
195 int ret;
196
197 grp = twlreg_grp(rdev);
198 if (grp < 0)
199 return grp;
200
201 grp |= P1_GRP_4030;
202
203 ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_GRP, grp);
204
205 return ret;
206}
207
208static int twl6030reg_enable(struct regulator_dev *rdev)
209{
210 struct twlreg_info *info = rdev_get_drvdata(rdev);
211 int grp = 0;
212 int ret;
213
214 if (!(twl_class_is_6030() && (info->features & TWL6032_SUBCLASS)))
215 grp = twlreg_grp(rdev);
216 if (grp < 0)
217 return grp;
218
219 ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_STATE,
220 grp << TWL6030_CFG_STATE_GRP_SHIFT |
221 TWL6030_CFG_STATE_ON);
222 return ret;
223}
224
225static int twl4030reg_disable(struct regulator_dev *rdev)
226{
227 struct twlreg_info *info = rdev_get_drvdata(rdev);
228 int grp;
229 int ret;
230
231 grp = twlreg_grp(rdev);
232 if (grp < 0)
233 return grp;
234
235 grp &= ~(P1_GRP_4030 | P2_GRP_4030 | P3_GRP_4030);
236
237 ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_GRP, grp);
238
239 return ret;
240}
241
242static int twl6030reg_disable(struct regulator_dev *rdev)
243{
244 struct twlreg_info *info = rdev_get_drvdata(rdev);
245 int grp = 0;
246 int ret;
247
248 if (!(twl_class_is_6030() && (info->features & TWL6032_SUBCLASS)))
249 grp = P1_GRP_6030 | P2_GRP_6030 | P3_GRP_6030;
250
251 /* For 6030, set the off state for all grps enabled */
252 ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_STATE,
253 (grp) << TWL6030_CFG_STATE_GRP_SHIFT |
254 TWL6030_CFG_STATE_OFF);
255
256 return ret;
257}
258
259static int twl4030reg_get_status(struct regulator_dev *rdev)
260{
261 int state = twlreg_grp(rdev);
262
263 if (state < 0)
264 return state;
265 state &= 0x0f;
266
267 /* assume state != WARM_RESET; we'd not be running... */
268 if (!state)
269 return REGULATOR_STATUS_OFF;
270 return (state & BIT(3))
271 ? REGULATOR_STATUS_NORMAL
272 : REGULATOR_STATUS_STANDBY;
273}
274
275static int twl6030reg_get_status(struct regulator_dev *rdev)
276{
277 struct twlreg_info *info = rdev_get_drvdata(rdev);
278 int val;
279
280 val = twlreg_grp(rdev);
281 if (val < 0)
282 return val;
283
284 val = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_STATE);
285
286 switch (TWL6030_CFG_STATE_APP(val)) {
287 case TWL6030_CFG_STATE_ON:
288 return REGULATOR_STATUS_NORMAL;
289
290 case TWL6030_CFG_STATE_SLEEP:
291 return REGULATOR_STATUS_STANDBY;
292
293 case TWL6030_CFG_STATE_OFF:
294 case TWL6030_CFG_STATE_OFF2:
295 default:
296 break;
297 }
298
299 return REGULATOR_STATUS_OFF;
300}
301
302static int twl4030reg_set_mode(struct regulator_dev *rdev, unsigned mode)
303{
304 struct twlreg_info *info = rdev_get_drvdata(rdev);
305 unsigned message;
306 int status;
307
308 /* We can only set the mode through state machine commands... */
309 switch (mode) {
310 case REGULATOR_MODE_NORMAL:
311 message = MSG_SINGULAR(DEV_GRP_P1, info->id, RES_STATE_ACTIVE);
312 break;
313 case REGULATOR_MODE_STANDBY:
314 message = MSG_SINGULAR(DEV_GRP_P1, info->id, RES_STATE_SLEEP);
315 break;
316 default:
317 return -EINVAL;
318 }
319
320 /* Ensure the resource is associated with some group */
321 status = twlreg_grp(rdev);
322 if (status < 0)
323 return status;
324 if (!(status & (P3_GRP_4030 | P2_GRP_4030 | P1_GRP_4030)))
325 return -EACCES;
326
327 status = twl_i2c_write_u8(TWL_MODULE_PM_MASTER,
328 message >> 8, TWL4030_PM_MASTER_PB_WORD_MSB);
329 if (status < 0)
330 return status;
331
332 return twl_i2c_write_u8(TWL_MODULE_PM_MASTER,
333 message & 0xff, TWL4030_PM_MASTER_PB_WORD_LSB);
334}
335
336static int twl6030reg_set_mode(struct regulator_dev *rdev, unsigned mode)
337{
338 struct twlreg_info *info = rdev_get_drvdata(rdev);
339 int grp = 0;
340 int val;
341
342 if (!(twl_class_is_6030() && (info->features & TWL6032_SUBCLASS)))
343 grp = twlreg_grp(rdev);
344
345 if (grp < 0)
346 return grp;
347
348 /* Compose the state register settings */
349 val = grp << TWL6030_CFG_STATE_GRP_SHIFT;
350 /* We can only set the mode through state machine commands... */
351 switch (mode) {
352 case REGULATOR_MODE_NORMAL:
353 val |= TWL6030_CFG_STATE_ON;
354 break;
355 case REGULATOR_MODE_STANDBY:
356 val |= TWL6030_CFG_STATE_SLEEP;
357 break;
358
359 default:
360 return -EINVAL;
361 }
362
363 return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_STATE, val);
364}
365
366/*----------------------------------------------------------------------*/
367
368/*
369 * Support for adjustable-voltage LDOs uses a four bit (or less) voltage
370 * select field in its control register. We use tables indexed by VSEL
371 * to record voltages in milliVolts. (Accuracy is about three percent.)
372 *
373 * Note that VSEL values for VAUX2 changed in twl5030 and newer silicon;
374 * currently handled by listing two slightly different VAUX2 regulators,
375 * only one of which will be configured.
376 *
377 * VSEL values documented as "TI cannot support these values" are flagged
378 * in these tables as UNSUP() values; we normally won't assign them.
379 *
380 * VAUX3 at 3V is incorrectly listed in some TI manuals as unsupported.
381 * TI are revising the twl5030/tps659x0 specs to support that 3.0V setting.
382 */
383#define UNSUP_MASK 0x8000
384
385#define UNSUP(x) (UNSUP_MASK | (x))
386#define IS_UNSUP(info, x) \
387 ((UNSUP_MASK & (x)) && \
388 !((info)->features & TWL4030_ALLOW_UNSUPPORTED))
389#define LDO_MV(x) (~UNSUP_MASK & (x))
390
391
392static const u16 VAUX1_VSEL_table[] = {
393 UNSUP(1500), UNSUP(1800), 2500, 2800,
394 3000, 3000, 3000, 3000,
395};
396static const u16 VAUX2_4030_VSEL_table[] = {
397 UNSUP(1000), UNSUP(1000), UNSUP(1200), 1300,
398 1500, 1800, UNSUP(1850), 2500,
399 UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000),
400 UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
401};
402static const u16 VAUX2_VSEL_table[] = {
403 1700, 1700, 1900, 1300,
404 1500, 1800, 2000, 2500,
405 2100, 2800, 2200, 2300,
406 2400, 2400, 2400, 2400,
407};
408static const u16 VAUX3_VSEL_table[] = {
409 1500, 1800, 2500, 2800,
410 3000, 3000, 3000, 3000,
411};
412static const u16 VAUX4_VSEL_table[] = {
413 700, 1000, 1200, UNSUP(1300),
414 1500, 1800, UNSUP(1850), 2500,
415 UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000),
416 UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
417};
418static const u16 VMMC1_VSEL_table[] = {
419 1850, 2850, 3000, 3150,
420};
421static const u16 VMMC2_VSEL_table[] = {
422 UNSUP(1000), UNSUP(1000), UNSUP(1200), UNSUP(1300),
423 UNSUP(1500), UNSUP(1800), 1850, UNSUP(2500),
424 2600, 2800, 2850, 3000,
425 3150, 3150, 3150, 3150,
426};
427static const u16 VPLL1_VSEL_table[] = {
428 1000, 1200, 1300, 1800,
429 UNSUP(2800), UNSUP(3000), UNSUP(3000), UNSUP(3000),
430};
431static const u16 VPLL2_VSEL_table[] = {
432 700, 1000, 1200, 1300,
433 UNSUP(1500), 1800, UNSUP(1850), UNSUP(2500),
434 UNSUP(2600), UNSUP(2800), UNSUP(2850), UNSUP(3000),
435 UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
436};
437static const u16 VSIM_VSEL_table[] = {
438 UNSUP(1000), UNSUP(1200), UNSUP(1300), 1800,
439 2800, 3000, 3000, 3000,
440};
441static const u16 VDAC_VSEL_table[] = {
442 1200, 1300, 1800, 1800,
443};
444static const u16 VIO_VSEL_table[] = {
445 1800, 1850,
446};
447static const u16 VINTANA2_VSEL_table[] = {
448 2500, 2750,
449};
450
451static int twl4030ldo_list_voltage(struct regulator_dev *rdev, unsigned index)
452{
453 struct twlreg_info *info = rdev_get_drvdata(rdev);
454 int mV = info->table[index];
455
456 return IS_UNSUP(info, mV) ? 0 : (LDO_MV(mV) * 1000);
457}
458
459static int
460twl4030ldo_set_voltage_sel(struct regulator_dev *rdev, unsigned selector)
461{
462 struct twlreg_info *info = rdev_get_drvdata(rdev);
463
464 return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE,
465 selector);
466}
467
468static int twl4030ldo_get_voltage_sel(struct regulator_dev *rdev)
469{
470 struct twlreg_info *info = rdev_get_drvdata(rdev);
471 int vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE);
472
473 if (vsel < 0)
474 return vsel;
475
476 vsel &= info->table_len - 1;
477 return vsel;
478}
479
480static struct regulator_ops twl4030ldo_ops = {
481 .list_voltage = twl4030ldo_list_voltage,
482
483 .set_voltage_sel = twl4030ldo_set_voltage_sel,
484 .get_voltage_sel = twl4030ldo_get_voltage_sel,
485
486 .enable = twl4030reg_enable,
487 .disable = twl4030reg_disable,
488 .is_enabled = twl4030reg_is_enabled,
489
490 .set_mode = twl4030reg_set_mode,
491
492 .get_status = twl4030reg_get_status,
493};
494
495static int
496twl4030smps_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV,
497 unsigned *selector)
498{
499 struct twlreg_info *info = rdev_get_drvdata(rdev);
500 int vsel = DIV_ROUND_UP(min_uV - 600000, 12500);
501
502 if (info->set_voltage) {
503 return info->set_voltage(info->data, min_uV);
504 } else {
505 twlreg_write(info, TWL_MODULE_PM_RECEIVER,
506 VREG_VOLTAGE_SMPS_4030, vsel);
507 }
508
509 return 0;
510}
511
512static int twl4030smps_get_voltage(struct regulator_dev *rdev)
513{
514 struct twlreg_info *info = rdev_get_drvdata(rdev);
515 int vsel;
516
517 if (info->get_voltage)
518 return info->get_voltage(info->data);
519
520 vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER,
521 VREG_VOLTAGE_SMPS_4030);
522
523 return vsel * 12500 + 600000;
524}
525
526static struct regulator_ops twl4030smps_ops = {
527 .set_voltage = twl4030smps_set_voltage,
528 .get_voltage = twl4030smps_get_voltage,
529};
530
531static int twl6030coresmps_set_voltage(struct regulator_dev *rdev, int min_uV,
532 int max_uV, unsigned *selector)
533{
534 struct twlreg_info *info = rdev_get_drvdata(rdev);
535
536 if (info->set_voltage)
537 return info->set_voltage(info->data, min_uV);
538
539 return -ENODEV;
540}
541
542static int twl6030coresmps_get_voltage(struct regulator_dev *rdev)
543{
544 struct twlreg_info *info = rdev_get_drvdata(rdev);
545
546 if (info->get_voltage)
547 return info->get_voltage(info->data);
548
549 return -ENODEV;
550}
551
552static struct regulator_ops twl6030coresmps_ops = {
553 .set_voltage = twl6030coresmps_set_voltage,
554 .get_voltage = twl6030coresmps_get_voltage,
555};
556
557static int twl6030ldo_list_voltage(struct regulator_dev *rdev, unsigned sel)
558{
559 struct twlreg_info *info = rdev_get_drvdata(rdev);
560
561 switch (sel) {
562 case 0:
563 return 0;
564 case 1 ... 24:
565 /* Linear mapping from 00000001 to 00011000:
566 * Absolute voltage value = 1.0 V + 0.1 V × (sel – 00000001)
567 */
568 return (info->min_mV + 100 * (sel - 1)) * 1000;
569 case 25 ... 30:
570 return -EINVAL;
571 case 31:
572 return 2750000;
573 default:
574 return -EINVAL;
575 }
576}
577
578static int
579twl6030ldo_set_voltage_sel(struct regulator_dev *rdev, unsigned selector)
580{
581 struct twlreg_info *info = rdev_get_drvdata(rdev);
582
583 return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE,
584 selector);
585}
586
587static int twl6030ldo_get_voltage_sel(struct regulator_dev *rdev)
588{
589 struct twlreg_info *info = rdev_get_drvdata(rdev);
590 int vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE);
591
592 return vsel;
593}
594
595static struct regulator_ops twl6030ldo_ops = {
596 .list_voltage = twl6030ldo_list_voltage,
597
598 .set_voltage_sel = twl6030ldo_set_voltage_sel,
599 .get_voltage_sel = twl6030ldo_get_voltage_sel,
600
601 .enable = twl6030reg_enable,
602 .disable = twl6030reg_disable,
603 .is_enabled = twl6030reg_is_enabled,
604
605 .set_mode = twl6030reg_set_mode,
606
607 .get_status = twl6030reg_get_status,
608};
609
610/*----------------------------------------------------------------------*/
611
612static struct regulator_ops twl4030fixed_ops = {
613 .list_voltage = regulator_list_voltage_linear,
614
615 .enable = twl4030reg_enable,
616 .disable = twl4030reg_disable,
617 .is_enabled = twl4030reg_is_enabled,
618
619 .set_mode = twl4030reg_set_mode,
620
621 .get_status = twl4030reg_get_status,
622};
623
624static struct regulator_ops twl6030fixed_ops = {
625 .list_voltage = regulator_list_voltage_linear,
626
627 .enable = twl6030reg_enable,
628 .disable = twl6030reg_disable,
629 .is_enabled = twl6030reg_is_enabled,
630
631 .set_mode = twl6030reg_set_mode,
632
633 .get_status = twl6030reg_get_status,
634};
635
636/*
637 * SMPS status and control
638 */
639
640static int twl6030smps_list_voltage(struct regulator_dev *rdev, unsigned index)
641{
642 struct twlreg_info *info = rdev_get_drvdata(rdev);
643
644 int voltage = 0;
645
646 switch (info->flags) {
647 case SMPS_OFFSET_EN:
648 voltage = 100000;
649 /* fall through */
650 case 0:
651 switch (index) {
652 case 0:
653 voltage = 0;
654 break;
655 case 58:
656 voltage = 1350 * 1000;
657 break;
658 case 59:
659 voltage = 1500 * 1000;
660 break;
661 case 60:
662 voltage = 1800 * 1000;
663 break;
664 case 61:
665 voltage = 1900 * 1000;
666 break;
667 case 62:
668 voltage = 2100 * 1000;
669 break;
670 default:
671 voltage += (600000 + (12500 * (index - 1)));
672 }
673 break;
674 case SMPS_EXTENDED_EN:
675 switch (index) {
676 case 0:
677 voltage = 0;
678 break;
679 case 58:
680 voltage = 2084 * 1000;
681 break;
682 case 59:
683 voltage = 2315 * 1000;
684 break;
685 case 60:
686 voltage = 2778 * 1000;
687 break;
688 case 61:
689 voltage = 2932 * 1000;
690 break;
691 case 62:
692 voltage = 3241 * 1000;
693 break;
694 default:
695 voltage = (1852000 + (38600 * (index - 1)));
696 }
697 break;
698 case SMPS_OFFSET_EN | SMPS_EXTENDED_EN:
699 switch (index) {
700 case 0:
701 voltage = 0;
702 break;
703 case 58:
704 voltage = 4167 * 1000;
705 break;
706 case 59:
707 voltage = 2315 * 1000;
708 break;
709 case 60:
710 voltage = 2778 * 1000;
711 break;
712 case 61:
713 voltage = 2932 * 1000;
714 break;
715 case 62:
716 voltage = 3241 * 1000;
717 break;
718 default:
719 voltage = (2161000 + (38600 * (index - 1)));
720 }
721 break;
722 }
723
724 return voltage;
725}
726
727static int twl6030smps_map_voltage(struct regulator_dev *rdev, int min_uV,
728 int max_uV)
729{
730 struct twlreg_info *info = rdev_get_drvdata(rdev);
731 int vsel = 0;
732
733 switch (info->flags) {
734 case 0:
735 if (min_uV == 0)
736 vsel = 0;
737 else if ((min_uV >= 600000) && (min_uV <= 1300000)) {
738 vsel = DIV_ROUND_UP(min_uV - 600000, 12500);
739 vsel++;
740 }
741 /* Values 1..57 for vsel are linear and can be calculated
742 * values 58..62 are non linear.
743 */
744 else if ((min_uV > 1900000) && (min_uV <= 2100000))
745 vsel = 62;
746 else if ((min_uV > 1800000) && (min_uV <= 1900000))
747 vsel = 61;
748 else if ((min_uV > 1500000) && (min_uV <= 1800000))
749 vsel = 60;
750 else if ((min_uV > 1350000) && (min_uV <= 1500000))
751 vsel = 59;
752 else if ((min_uV > 1300000) && (min_uV <= 1350000))
753 vsel = 58;
754 else
755 return -EINVAL;
756 break;
757 case SMPS_OFFSET_EN:
758 if (min_uV == 0)
759 vsel = 0;
760 else if ((min_uV >= 700000) && (min_uV <= 1420000)) {
761 vsel = DIV_ROUND_UP(min_uV - 700000, 12500);
762 vsel++;
763 }
764 /* Values 1..57 for vsel are linear and can be calculated
765 * values 58..62 are non linear.
766 */
767 else if ((min_uV > 1900000) && (min_uV <= 2100000))
768 vsel = 62;
769 else if ((min_uV > 1800000) && (min_uV <= 1900000))
770 vsel = 61;
771 else if ((min_uV > 1350000) && (min_uV <= 1800000))
772 vsel = 60;
773 else if ((min_uV > 1350000) && (min_uV <= 1500000))
774 vsel = 59;
775 else if ((min_uV > 1300000) && (min_uV <= 1350000))
776 vsel = 58;
777 else
778 return -EINVAL;
779 break;
780 case SMPS_EXTENDED_EN:
781 if (min_uV == 0) {
782 vsel = 0;
783 } else if ((min_uV >= 1852000) && (max_uV <= 4013600)) {
784 vsel = DIV_ROUND_UP(min_uV - 1852000, 38600);
785 vsel++;
786 }
787 break;
788 case SMPS_OFFSET_EN|SMPS_EXTENDED_EN:
789 if (min_uV == 0) {
790 vsel = 0;
791 } else if ((min_uV >= 2161000) && (min_uV <= 4321000)) {
792 vsel = DIV_ROUND_UP(min_uV - 2161000, 38600);
793 vsel++;
794 }
795 break;
796 }
797
798 return vsel;
799}
800
801static int twl6030smps_set_voltage_sel(struct regulator_dev *rdev,
802 unsigned int selector)
803{
804 struct twlreg_info *info = rdev_get_drvdata(rdev);
805
806 return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE_SMPS,
807 selector);
808}
809
810static int twl6030smps_get_voltage_sel(struct regulator_dev *rdev)
811{
812 struct twlreg_info *info = rdev_get_drvdata(rdev);
813
814 return twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE_SMPS);
815}
816
817static struct regulator_ops twlsmps_ops = {
818 .list_voltage = twl6030smps_list_voltage,
819 .map_voltage = twl6030smps_map_voltage,
820
821 .set_voltage_sel = twl6030smps_set_voltage_sel,
822 .get_voltage_sel = twl6030smps_get_voltage_sel,
823
824 .enable = twl6030reg_enable,
825 .disable = twl6030reg_disable,
826 .is_enabled = twl6030reg_is_enabled,
827
828 .set_mode = twl6030reg_set_mode,
829
830 .get_status = twl6030reg_get_status,
831};
832
833/*----------------------------------------------------------------------*/
834
835#define TWL4030_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \
836 remap_conf) \
837 TWL_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \
838 remap_conf, TWL4030, twl4030fixed_ops)
839#define TWL6030_FIXED_LDO(label, offset, mVolts, turnon_delay) \
840 TWL_FIXED_LDO(label, offset, mVolts, 0x0, turnon_delay, \
841 0x0, TWL6030, twl6030fixed_ops)
842
843#define TWL4030_ADJUSTABLE_LDO(label, offset, num, turnon_delay, remap_conf) \
844static const struct twlreg_info TWL4030_INFO_##label = { \
845 .base = offset, \
846 .id = num, \
847 .table_len = ARRAY_SIZE(label##_VSEL_table), \
848 .table = label##_VSEL_table, \
849 .remap = remap_conf, \
850 .desc = { \
851 .name = #label, \
852 .id = TWL4030_REG_##label, \
853 .n_voltages = ARRAY_SIZE(label##_VSEL_table), \
854 .ops = &twl4030ldo_ops, \
855 .type = REGULATOR_VOLTAGE, \
856 .owner = THIS_MODULE, \
857 .enable_time = turnon_delay, \
858 }, \
859 }
860
861#define TWL4030_ADJUSTABLE_SMPS(label, offset, num, turnon_delay, remap_conf) \
862static const struct twlreg_info TWL4030_INFO_##label = { \
863 .base = offset, \
864 .id = num, \
865 .remap = remap_conf, \
866 .desc = { \
867 .name = #label, \
868 .id = TWL4030_REG_##label, \
869 .ops = &twl4030smps_ops, \
870 .type = REGULATOR_VOLTAGE, \
871 .owner = THIS_MODULE, \
872 .enable_time = turnon_delay, \
873 }, \
874 }
875
876#define TWL6030_ADJUSTABLE_SMPS(label) \
877static const struct twlreg_info TWL6030_INFO_##label = { \
878 .desc = { \
879 .name = #label, \
880 .id = TWL6030_REG_##label, \
881 .ops = &twl6030coresmps_ops, \
882 .type = REGULATOR_VOLTAGE, \
883 .owner = THIS_MODULE, \
884 }, \
885 }
886
887#define TWL6030_ADJUSTABLE_LDO(label, offset, min_mVolts, max_mVolts) \
888static const struct twlreg_info TWL6030_INFO_##label = { \
889 .base = offset, \
890 .min_mV = min_mVolts, \
891 .max_mV = max_mVolts, \
892 .desc = { \
893 .name = #label, \
894 .id = TWL6030_REG_##label, \
895 .n_voltages = 32, \
896 .ops = &twl6030ldo_ops, \
897 .type = REGULATOR_VOLTAGE, \
898 .owner = THIS_MODULE, \
899 }, \
900 }
901
902#define TWL6032_ADJUSTABLE_LDO(label, offset, min_mVolts, max_mVolts) \
903static const struct twlreg_info TWL6032_INFO_##label = { \
904 .base = offset, \
905 .min_mV = min_mVolts, \
906 .max_mV = max_mVolts, \
907 .desc = { \
908 .name = #label, \
909 .id = TWL6032_REG_##label, \
910 .n_voltages = 32, \
911 .ops = &twl6030ldo_ops, \
912 .type = REGULATOR_VOLTAGE, \
913 .owner = THIS_MODULE, \
914 }, \
915 }
916
917#define TWL_FIXED_LDO(label, offset, mVolts, num, turnon_delay, remap_conf, \
918 family, operations) \
919static const struct twlreg_info TWLFIXED_INFO_##label = { \
920 .base = offset, \
921 .id = num, \
922 .min_mV = mVolts, \
923 .remap = remap_conf, \
924 .desc = { \
925 .name = #label, \
926 .id = family##_REG_##label, \
927 .n_voltages = 1, \
928 .ops = &operations, \
929 .type = REGULATOR_VOLTAGE, \
930 .owner = THIS_MODULE, \
931 .min_uV = mVolts * 1000, \
932 .enable_time = turnon_delay, \
933 }, \
934 }
935
936#define TWL6032_ADJUSTABLE_SMPS(label, offset) \
937static const struct twlreg_info TWLSMPS_INFO_##label = { \
938 .base = offset, \
939 .min_mV = 600, \
940 .max_mV = 2100, \
941 .desc = { \
942 .name = #label, \
943 .id = TWL6032_REG_##label, \
944 .n_voltages = 63, \
945 .ops = &twlsmps_ops, \
946 .type = REGULATOR_VOLTAGE, \
947 .owner = THIS_MODULE, \
948 }, \
949 }
950
951/*
952 * We list regulators here if systems need some level of
953 * software control over them after boot.
954 */
955TWL4030_ADJUSTABLE_LDO(VAUX1, 0x17, 1, 100, 0x08);
956TWL4030_ADJUSTABLE_LDO(VAUX2_4030, 0x1b, 2, 100, 0x08);
957TWL4030_ADJUSTABLE_LDO(VAUX2, 0x1b, 2, 100, 0x08);
958TWL4030_ADJUSTABLE_LDO(VAUX3, 0x1f, 3, 100, 0x08);
959TWL4030_ADJUSTABLE_LDO(VAUX4, 0x23, 4, 100, 0x08);
960TWL4030_ADJUSTABLE_LDO(VMMC1, 0x27, 5, 100, 0x08);
961TWL4030_ADJUSTABLE_LDO(VMMC2, 0x2b, 6, 100, 0x08);
962TWL4030_ADJUSTABLE_LDO(VPLL1, 0x2f, 7, 100, 0x00);
963TWL4030_ADJUSTABLE_LDO(VPLL2, 0x33, 8, 100, 0x08);
964TWL4030_ADJUSTABLE_LDO(VSIM, 0x37, 9, 100, 0x00);
965TWL4030_ADJUSTABLE_LDO(VDAC, 0x3b, 10, 100, 0x08);
966TWL4030_ADJUSTABLE_LDO(VINTANA2, 0x43, 12, 100, 0x08);
967TWL4030_ADJUSTABLE_LDO(VIO, 0x4b, 14, 1000, 0x08);
968TWL4030_ADJUSTABLE_SMPS(VDD1, 0x55, 15, 1000, 0x08);
969TWL4030_ADJUSTABLE_SMPS(VDD2, 0x63, 16, 1000, 0x08);
970/* VUSBCP is managed *only* by the USB subchip */
971/* 6030 REG with base as PMC Slave Misc : 0x0030 */
972/* Turnon-delay and remap configuration values for 6030 are not
973 verified since the specification is not public */
974TWL6030_ADJUSTABLE_SMPS(VDD1);
975TWL6030_ADJUSTABLE_SMPS(VDD2);
976TWL6030_ADJUSTABLE_SMPS(VDD3);
977TWL6030_ADJUSTABLE_LDO(VAUX1_6030, 0x54, 1000, 3300);
978TWL6030_ADJUSTABLE_LDO(VAUX2_6030, 0x58, 1000, 3300);
979TWL6030_ADJUSTABLE_LDO(VAUX3_6030, 0x5c, 1000, 3300);
980TWL6030_ADJUSTABLE_LDO(VMMC, 0x68, 1000, 3300);
981TWL6030_ADJUSTABLE_LDO(VPP, 0x6c, 1000, 3300);
982TWL6030_ADJUSTABLE_LDO(VUSIM, 0x74, 1000, 3300);
983/* 6025 are renamed compared to 6030 versions */
984TWL6032_ADJUSTABLE_LDO(LDO2, 0x54, 1000, 3300);
985TWL6032_ADJUSTABLE_LDO(LDO4, 0x58, 1000, 3300);
986TWL6032_ADJUSTABLE_LDO(LDO3, 0x5c, 1000, 3300);
987TWL6032_ADJUSTABLE_LDO(LDO5, 0x68, 1000, 3300);
988TWL6032_ADJUSTABLE_LDO(LDO1, 0x6c, 1000, 3300);
989TWL6032_ADJUSTABLE_LDO(LDO7, 0x74, 1000, 3300);
990TWL6032_ADJUSTABLE_LDO(LDO6, 0x60, 1000, 3300);
991TWL6032_ADJUSTABLE_LDO(LDOLN, 0x64, 1000, 3300);
992TWL6032_ADJUSTABLE_LDO(LDOUSB, 0x70, 1000, 3300);
993TWL4030_FIXED_LDO(VINTANA1, 0x3f, 1500, 11, 100, 0x08);
994TWL4030_FIXED_LDO(VINTDIG, 0x47, 1500, 13, 100, 0x08);
995TWL4030_FIXED_LDO(VUSB1V5, 0x71, 1500, 17, 100, 0x08);
996TWL4030_FIXED_LDO(VUSB1V8, 0x74, 1800, 18, 100, 0x08);
997TWL4030_FIXED_LDO(VUSB3V1, 0x77, 3100, 19, 150, 0x08);
998TWL6030_FIXED_LDO(VANA, 0x50, 2100, 0);
999TWL6030_FIXED_LDO(VCXIO, 0x60, 1800, 0);
1000TWL6030_FIXED_LDO(VDAC, 0x64, 1800, 0);
1001TWL6030_FIXED_LDO(VUSB, 0x70, 3300, 0);
1002TWL6030_FIXED_LDO(V1V8, 0x16, 1800, 0);
1003TWL6030_FIXED_LDO(V2V1, 0x1c, 2100, 0);
1004TWL6032_ADJUSTABLE_SMPS(SMPS3, 0x34);
1005TWL6032_ADJUSTABLE_SMPS(SMPS4, 0x10);
1006TWL6032_ADJUSTABLE_SMPS(VIO, 0x16);
1007
1008static u8 twl_get_smps_offset(void)
1009{
1010 u8 value;
1011
1012 twl_i2c_read_u8(TWL_MODULE_PM_RECEIVER, &value,
1013 TWL6030_SMPS_OFFSET);
1014 return value;
1015}
1016
1017static u8 twl_get_smps_mult(void)
1018{
1019 u8 value;
1020
1021 twl_i2c_read_u8(TWL_MODULE_PM_RECEIVER, &value,
1022 TWL6030_SMPS_MULT);
1023 return value;
1024}
1025
1026#define TWL_OF_MATCH(comp, family, label) \
1027 { \
1028 .compatible = comp, \
1029 .data = &family##_INFO_##label, \
1030 }
1031
1032#define TWL4030_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWL4030, label)
1033#define TWL6030_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWL6030, label)
1034#define TWL6032_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWL6032, label)
1035#define TWLFIXED_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWLFIXED, label)
1036#define TWLSMPS_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWLSMPS, label)
1037
1038static const struct of_device_id twl_of_match[] = {
1039 TWL4030_OF_MATCH("ti,twl4030-vaux1", VAUX1),
1040 TWL4030_OF_MATCH("ti,twl4030-vaux2", VAUX2_4030),
1041 TWL4030_OF_MATCH("ti,twl5030-vaux2", VAUX2),
1042 TWL4030_OF_MATCH("ti,twl4030-vaux3", VAUX3),
1043 TWL4030_OF_MATCH("ti,twl4030-vaux4", VAUX4),
1044 TWL4030_OF_MATCH("ti,twl4030-vmmc1", VMMC1),
1045 TWL4030_OF_MATCH("ti,twl4030-vmmc2", VMMC2),
1046 TWL4030_OF_MATCH("ti,twl4030-vpll1", VPLL1),
1047 TWL4030_OF_MATCH("ti,twl4030-vpll2", VPLL2),
1048 TWL4030_OF_MATCH("ti,twl4030-vsim", VSIM),
1049 TWL4030_OF_MATCH("ti,twl4030-vdac", VDAC),
1050 TWL4030_OF_MATCH("ti,twl4030-vintana2", VINTANA2),
1051 TWL4030_OF_MATCH("ti,twl4030-vio", VIO),
1052 TWL4030_OF_MATCH("ti,twl4030-vdd1", VDD1),
1053 TWL4030_OF_MATCH("ti,twl4030-vdd2", VDD2),
1054 TWL6030_OF_MATCH("ti,twl6030-vdd1", VDD1),
1055 TWL6030_OF_MATCH("ti,twl6030-vdd2", VDD2),
1056 TWL6030_OF_MATCH("ti,twl6030-vdd3", VDD3),
1057 TWL6030_OF_MATCH("ti,twl6030-vaux1", VAUX1_6030),
1058 TWL6030_OF_MATCH("ti,twl6030-vaux2", VAUX2_6030),
1059 TWL6030_OF_MATCH("ti,twl6030-vaux3", VAUX3_6030),
1060 TWL6030_OF_MATCH("ti,twl6030-vmmc", VMMC),
1061 TWL6030_OF_MATCH("ti,twl6030-vpp", VPP),
1062 TWL6030_OF_MATCH("ti,twl6030-vusim", VUSIM),
1063 TWL6032_OF_MATCH("ti,twl6032-ldo2", LDO2),
1064 TWL6032_OF_MATCH("ti,twl6032-ldo4", LDO4),
1065 TWL6032_OF_MATCH("ti,twl6032-ldo3", LDO3),
1066 TWL6032_OF_MATCH("ti,twl6032-ldo5", LDO5),
1067 TWL6032_OF_MATCH("ti,twl6032-ldo1", LDO1),
1068 TWL6032_OF_MATCH("ti,twl6032-ldo7", LDO7),
1069 TWL6032_OF_MATCH("ti,twl6032-ldo6", LDO6),
1070 TWL6032_OF_MATCH("ti,twl6032-ldoln", LDOLN),
1071 TWL6032_OF_MATCH("ti,twl6032-ldousb", LDOUSB),
1072 TWLFIXED_OF_MATCH("ti,twl4030-vintana1", VINTANA1),
1073 TWLFIXED_OF_MATCH("ti,twl4030-vintdig", VINTDIG),
1074 TWLFIXED_OF_MATCH("ti,twl4030-vusb1v5", VUSB1V5),
1075 TWLFIXED_OF_MATCH("ti,twl4030-vusb1v8", VUSB1V8),
1076 TWLFIXED_OF_MATCH("ti,twl4030-vusb3v1", VUSB3V1),
1077 TWLFIXED_OF_MATCH("ti,twl6030-vana", VANA),
1078 TWLFIXED_OF_MATCH("ti,twl6030-vcxio", VCXIO),
1079 TWLFIXED_OF_MATCH("ti,twl6030-vdac", VDAC),
1080 TWLFIXED_OF_MATCH("ti,twl6030-vusb", VUSB),
1081 TWLFIXED_OF_MATCH("ti,twl6030-v1v8", V1V8),
1082 TWLFIXED_OF_MATCH("ti,twl6030-v2v1", V2V1),
1083 TWLSMPS_OF_MATCH("ti,twl6032-smps3", SMPS3),
1084 TWLSMPS_OF_MATCH("ti,twl6032-smps4", SMPS4),
1085 TWLSMPS_OF_MATCH("ti,twl6032-vio", VIO),
1086 {},
1087};
1088MODULE_DEVICE_TABLE(of, twl_of_match);
1089
1090static int twlreg_probe(struct platform_device *pdev)
1091{
1092 int i, id;
1093 struct twlreg_info *info;
1094 const struct twlreg_info *template;
1095 struct regulator_init_data *initdata;
1096 struct regulation_constraints *c;
1097 struct regulator_dev *rdev;
1098 struct twl_regulator_driver_data *drvdata;
1099 const struct of_device_id *match;
1100 struct regulator_config config = { };
1101
1102 match = of_match_device(twl_of_match, &pdev->dev);
1103 if (match) {
1104 template = match->data;
1105 id = template->desc.id;
1106 initdata = of_get_regulator_init_data(&pdev->dev,
1107 pdev->dev.of_node,
1108 &template->desc);
1109 drvdata = NULL;
1110 } else {
1111 id = pdev->id;
1112 initdata = dev_get_platdata(&pdev->dev);
1113 for (i = 0, template = NULL; i < ARRAY_SIZE(twl_of_match); i++) {
1114 template = twl_of_match[i].data;
1115 if (template && template->desc.id == id)
1116 break;
1117 }
1118 if (i == ARRAY_SIZE(twl_of_match))
1119 return -ENODEV;
1120
1121 drvdata = initdata->driver_data;
1122 if (!drvdata)
1123 return -EINVAL;
1124 }
1125
1126 if (!template)
1127 return -ENODEV;
1128
1129 if (!initdata)
1130 return -EINVAL;
1131
1132 info = devm_kmemdup(&pdev->dev, template, sizeof(*info), GFP_KERNEL);
1133 if (!info)
1134 return -ENOMEM;
1135
1136 if (drvdata) {
1137 /* copy the driver data into regulator data */
1138 info->features = drvdata->features;
1139 info->data = drvdata->data;
1140 info->set_voltage = drvdata->set_voltage;
1141 info->get_voltage = drvdata->get_voltage;
1142 }
1143
1144 /* Constrain board-specific capabilities according to what
1145 * this driver and the chip itself can actually do.
1146 */
1147 c = &initdata->constraints;
1148 c->valid_modes_mask &= REGULATOR_MODE_NORMAL | REGULATOR_MODE_STANDBY;
1149 c->valid_ops_mask &= REGULATOR_CHANGE_VOLTAGE
1150 | REGULATOR_CHANGE_MODE
1151 | REGULATOR_CHANGE_STATUS;
1152 switch (id) {
1153 case TWL4030_REG_VIO:
1154 case TWL4030_REG_VDD1:
1155 case TWL4030_REG_VDD2:
1156 case TWL4030_REG_VPLL1:
1157 case TWL4030_REG_VINTANA1:
1158 case TWL4030_REG_VINTANA2:
1159 case TWL4030_REG_VINTDIG:
1160 c->always_on = true;
1161 break;
1162 default:
1163 break;
1164 }
1165
1166 switch (id) {
1167 case TWL6032_REG_SMPS3:
1168 if (twl_get_smps_mult() & SMPS_MULTOFFSET_SMPS3)
1169 info->flags |= SMPS_EXTENDED_EN;
1170 if (twl_get_smps_offset() & SMPS_MULTOFFSET_SMPS3)
1171 info->flags |= SMPS_OFFSET_EN;
1172 break;
1173 case TWL6032_REG_SMPS4:
1174 if (twl_get_smps_mult() & SMPS_MULTOFFSET_SMPS4)
1175 info->flags |= SMPS_EXTENDED_EN;
1176 if (twl_get_smps_offset() & SMPS_MULTOFFSET_SMPS4)
1177 info->flags |= SMPS_OFFSET_EN;
1178 break;
1179 case TWL6032_REG_VIO:
1180 if (twl_get_smps_mult() & SMPS_MULTOFFSET_VIO)
1181 info->flags |= SMPS_EXTENDED_EN;
1182 if (twl_get_smps_offset() & SMPS_MULTOFFSET_VIO)
1183 info->flags |= SMPS_OFFSET_EN;
1184 break;
1185 }
1186
1187 config.dev = &pdev->dev;
1188 config.init_data = initdata;
1189 config.driver_data = info;
1190 config.of_node = pdev->dev.of_node;
1191
1192 rdev = devm_regulator_register(&pdev->dev, &info->desc, &config);
1193 if (IS_ERR(rdev)) {
1194 dev_err(&pdev->dev, "can't register %s, %ld\n",
1195 info->desc.name, PTR_ERR(rdev));
1196 return PTR_ERR(rdev);
1197 }
1198 platform_set_drvdata(pdev, rdev);
1199
1200 if (twl_class_is_4030())
1201 twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_REMAP,
1202 info->remap);
1203
1204 /* NOTE: many regulators support short-circuit IRQs (presentable
1205 * as REGULATOR_OVER_CURRENT notifications?) configured via:
1206 * - SC_CONFIG
1207 * - SC_DETECT1 (vintana2, vmmc1/2, vaux1/2/3/4)
1208 * - SC_DETECT2 (vusb, vdac, vio, vdd1/2, vpll2)
1209 * - IT_CONFIG
1210 */
1211
1212 return 0;
1213}
1214
1215MODULE_ALIAS("platform:twl_reg");
1216
1217static struct platform_driver twlreg_driver = {
1218 .probe = twlreg_probe,
1219 /* NOTE: short name, to work around driver model truncation of
1220 * "twl_regulator.12" (and friends) to "twl_regulator.1".
1221 */
1222 .driver = {
1223 .name = "twl_reg",
1224 .of_match_table = of_match_ptr(twl_of_match),
1225 },
1226};
1227
1228static int __init twlreg_init(void)
1229{
1230 return platform_driver_register(&twlreg_driver);
1231}
1232subsys_initcall(twlreg_init);
1233
1234static void __exit twlreg_exit(void)
1235{
1236 platform_driver_unregister(&twlreg_driver);
1237}
1238module_exit(twlreg_exit)
1239
1240MODULE_DESCRIPTION("TWL regulator driver");
1241MODULE_LICENSE("GPL");
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * twl-regulator.c -- support regulators in twl4030/twl6030 family chips
4 *
5 * Copyright (C) 2008 David Brownell
6 */
7
8#include <linux/module.h>
9#include <linux/string.h>
10#include <linux/slab.h>
11#include <linux/init.h>
12#include <linux/err.h>
13#include <linux/platform_device.h>
14#include <linux/of.h>
15#include <linux/of_device.h>
16#include <linux/regulator/driver.h>
17#include <linux/regulator/machine.h>
18#include <linux/regulator/of_regulator.h>
19#include <linux/mfd/twl.h>
20#include <linux/delay.h>
21
22/*
23 * The TWL4030/TW5030/TPS659x0 family chips include power management, a
24 * USB OTG transceiver, an RTC, ADC, PWM, and lots more. Some versions
25 * include an audio codec, battery charger, and more voltage regulators.
26 * These chips are often used in OMAP-based systems.
27 *
28 * This driver implements software-based resource control for various
29 * voltage regulators. This is usually augmented with state machine
30 * based control.
31 */
32
33struct twlreg_info {
34 /* start of regulator's PM_RECEIVER control register bank */
35 u8 base;
36
37 /* twl resource ID, for resource control state machine */
38 u8 id;
39
40 /* voltage in mV = table[VSEL]; table_len must be a power-of-two */
41 u8 table_len;
42 const u16 *table;
43
44 /* State REMAP default configuration */
45 u8 remap;
46
47 /* used by regulator core */
48 struct regulator_desc desc;
49
50 /* chip specific features */
51 unsigned long features;
52
53 /* data passed from board for external get/set voltage */
54 void *data;
55};
56
57
58/* LDO control registers ... offset is from the base of its register bank.
59 * The first three registers of all power resource banks help hardware to
60 * manage the various resource groups.
61 */
62/* Common offset in TWL4030/6030 */
63#define VREG_GRP 0
64/* TWL4030 register offsets */
65#define VREG_TYPE 1
66#define VREG_REMAP 2
67#define VREG_DEDICATED 3 /* LDO control */
68#define VREG_VOLTAGE_SMPS_4030 9
69/* TWL6030 register offsets */
70#define VREG_TRANS 1
71#define VREG_STATE 2
72#define VREG_VOLTAGE 3
73#define VREG_VOLTAGE_SMPS 4
74
75static inline int
76twlreg_read(struct twlreg_info *info, unsigned slave_subgp, unsigned offset)
77{
78 u8 value;
79 int status;
80
81 status = twl_i2c_read_u8(slave_subgp,
82 &value, info->base + offset);
83 return (status < 0) ? status : value;
84}
85
86static inline int
87twlreg_write(struct twlreg_info *info, unsigned slave_subgp, unsigned offset,
88 u8 value)
89{
90 return twl_i2c_write_u8(slave_subgp,
91 value, info->base + offset);
92}
93
94/*----------------------------------------------------------------------*/
95
96/* generic power resource operations, which work on all regulators */
97
98static int twlreg_grp(struct regulator_dev *rdev)
99{
100 return twlreg_read(rdev_get_drvdata(rdev), TWL_MODULE_PM_RECEIVER,
101 VREG_GRP);
102}
103
104/*
105 * Enable/disable regulators by joining/leaving the P1 (processor) group.
106 * We assume nobody else is updating the DEV_GRP registers.
107 */
108/* definition for 4030 family */
109#define P3_GRP_4030 BIT(7) /* "peripherals" */
110#define P2_GRP_4030 BIT(6) /* secondary processor, modem, etc */
111#define P1_GRP_4030 BIT(5) /* CPU/Linux */
112/* definition for 6030 family */
113#define P3_GRP_6030 BIT(2) /* secondary processor, modem, etc */
114#define P2_GRP_6030 BIT(1) /* "peripherals" */
115#define P1_GRP_6030 BIT(0) /* CPU/Linux */
116
117static int twl4030reg_is_enabled(struct regulator_dev *rdev)
118{
119 int state = twlreg_grp(rdev);
120
121 if (state < 0)
122 return state;
123
124 return state & P1_GRP_4030;
125}
126
127#define PB_I2C_BUSY BIT(0)
128#define PB_I2C_BWEN BIT(1)
129
130/* Wait until buffer empty/ready to send a word on power bus. */
131static int twl4030_wait_pb_ready(void)
132{
133
134 int ret;
135 int timeout = 10;
136 u8 val;
137
138 do {
139 ret = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &val,
140 TWL4030_PM_MASTER_PB_CFG);
141 if (ret < 0)
142 return ret;
143
144 if (!(val & PB_I2C_BUSY))
145 return 0;
146
147 mdelay(1);
148 timeout--;
149 } while (timeout);
150
151 return -ETIMEDOUT;
152}
153
154/* Send a word over the powerbus */
155static int twl4030_send_pb_msg(unsigned msg)
156{
157 u8 val;
158 int ret;
159
160 /* save powerbus configuration */
161 ret = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &val,
162 TWL4030_PM_MASTER_PB_CFG);
163 if (ret < 0)
164 return ret;
165
166 /* Enable i2c access to powerbus */
167 ret = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, val | PB_I2C_BWEN,
168 TWL4030_PM_MASTER_PB_CFG);
169 if (ret < 0)
170 return ret;
171
172 ret = twl4030_wait_pb_ready();
173 if (ret < 0)
174 return ret;
175
176 ret = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, msg >> 8,
177 TWL4030_PM_MASTER_PB_WORD_MSB);
178 if (ret < 0)
179 return ret;
180
181 ret = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, msg & 0xff,
182 TWL4030_PM_MASTER_PB_WORD_LSB);
183 if (ret < 0)
184 return ret;
185
186 ret = twl4030_wait_pb_ready();
187 if (ret < 0)
188 return ret;
189
190 /* Restore powerbus configuration */
191 return twl_i2c_write_u8(TWL_MODULE_PM_MASTER, val,
192 TWL4030_PM_MASTER_PB_CFG);
193}
194
195static int twl4030reg_enable(struct regulator_dev *rdev)
196{
197 struct twlreg_info *info = rdev_get_drvdata(rdev);
198 int grp;
199 int ret;
200
201 grp = twlreg_grp(rdev);
202 if (grp < 0)
203 return grp;
204
205 grp |= P1_GRP_4030;
206
207 ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_GRP, grp);
208
209 return ret;
210}
211
212static int twl4030reg_disable(struct regulator_dev *rdev)
213{
214 struct twlreg_info *info = rdev_get_drvdata(rdev);
215 int grp;
216 int ret;
217
218 grp = twlreg_grp(rdev);
219 if (grp < 0)
220 return grp;
221
222 grp &= ~(P1_GRP_4030 | P2_GRP_4030 | P3_GRP_4030);
223
224 ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_GRP, grp);
225
226 return ret;
227}
228
229static int twl4030reg_get_status(struct regulator_dev *rdev)
230{
231 int state = twlreg_grp(rdev);
232
233 if (state < 0)
234 return state;
235 state &= 0x0f;
236
237 /* assume state != WARM_RESET; we'd not be running... */
238 if (!state)
239 return REGULATOR_STATUS_OFF;
240 return (state & BIT(3))
241 ? REGULATOR_STATUS_NORMAL
242 : REGULATOR_STATUS_STANDBY;
243}
244
245static int twl4030reg_set_mode(struct regulator_dev *rdev, unsigned mode)
246{
247 struct twlreg_info *info = rdev_get_drvdata(rdev);
248 unsigned message;
249
250 /* We can only set the mode through state machine commands... */
251 switch (mode) {
252 case REGULATOR_MODE_NORMAL:
253 message = MSG_SINGULAR(DEV_GRP_P1, info->id, RES_STATE_ACTIVE);
254 break;
255 case REGULATOR_MODE_STANDBY:
256 message = MSG_SINGULAR(DEV_GRP_P1, info->id, RES_STATE_SLEEP);
257 break;
258 default:
259 return -EINVAL;
260 }
261
262 return twl4030_send_pb_msg(message);
263}
264
265static inline unsigned int twl4030reg_map_mode(unsigned int mode)
266{
267 switch (mode) {
268 case RES_STATE_ACTIVE:
269 return REGULATOR_MODE_NORMAL;
270 case RES_STATE_SLEEP:
271 return REGULATOR_MODE_STANDBY;
272 default:
273 return REGULATOR_MODE_INVALID;
274 }
275}
276
277/*----------------------------------------------------------------------*/
278
279/*
280 * Support for adjustable-voltage LDOs uses a four bit (or less) voltage
281 * select field in its control register. We use tables indexed by VSEL
282 * to record voltages in milliVolts. (Accuracy is about three percent.)
283 *
284 * Note that VSEL values for VAUX2 changed in twl5030 and newer silicon;
285 * currently handled by listing two slightly different VAUX2 regulators,
286 * only one of which will be configured.
287 *
288 * VSEL values documented as "TI cannot support these values" are flagged
289 * in these tables as UNSUP() values; we normally won't assign them.
290 *
291 * VAUX3 at 3V is incorrectly listed in some TI manuals as unsupported.
292 * TI are revising the twl5030/tps659x0 specs to support that 3.0V setting.
293 */
294#define UNSUP_MASK 0x8000
295
296#define UNSUP(x) (UNSUP_MASK | (x))
297#define IS_UNSUP(info, x) \
298 ((UNSUP_MASK & (x)) && \
299 !((info)->features & TWL4030_ALLOW_UNSUPPORTED))
300#define LDO_MV(x) (~UNSUP_MASK & (x))
301
302
303static const u16 VAUX1_VSEL_table[] = {
304 UNSUP(1500), UNSUP(1800), 2500, 2800,
305 3000, 3000, 3000, 3000,
306};
307static const u16 VAUX2_4030_VSEL_table[] = {
308 UNSUP(1000), UNSUP(1000), UNSUP(1200), 1300,
309 1500, 1800, UNSUP(1850), 2500,
310 UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000),
311 UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
312};
313static const u16 VAUX2_VSEL_table[] = {
314 1700, 1700, 1900, 1300,
315 1500, 1800, 2000, 2500,
316 2100, 2800, 2200, 2300,
317 2400, 2400, 2400, 2400,
318};
319static const u16 VAUX3_VSEL_table[] = {
320 1500, 1800, 2500, 2800,
321 3000, 3000, 3000, 3000,
322};
323static const u16 VAUX4_VSEL_table[] = {
324 700, 1000, 1200, UNSUP(1300),
325 1500, 1800, UNSUP(1850), 2500,
326 UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000),
327 UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
328};
329static const u16 VMMC1_VSEL_table[] = {
330 1850, 2850, 3000, 3150,
331};
332static const u16 VMMC2_VSEL_table[] = {
333 UNSUP(1000), UNSUP(1000), UNSUP(1200), UNSUP(1300),
334 UNSUP(1500), UNSUP(1800), 1850, UNSUP(2500),
335 2600, 2800, 2850, 3000,
336 3150, 3150, 3150, 3150,
337};
338static const u16 VPLL1_VSEL_table[] = {
339 1000, 1200, 1300, 1800,
340 UNSUP(2800), UNSUP(3000), UNSUP(3000), UNSUP(3000),
341};
342static const u16 VPLL2_VSEL_table[] = {
343 700, 1000, 1200, 1300,
344 UNSUP(1500), 1800, UNSUP(1850), UNSUP(2500),
345 UNSUP(2600), UNSUP(2800), UNSUP(2850), UNSUP(3000),
346 UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
347};
348static const u16 VSIM_VSEL_table[] = {
349 UNSUP(1000), UNSUP(1200), UNSUP(1300), 1800,
350 2800, 3000, 3000, 3000,
351};
352static const u16 VDAC_VSEL_table[] = {
353 1200, 1300, 1800, 1800,
354};
355static const u16 VIO_VSEL_table[] = {
356 1800, 1850,
357};
358static const u16 VINTANA2_VSEL_table[] = {
359 2500, 2750,
360};
361
362/* 600mV to 1450mV in 12.5 mV steps */
363static const struct linear_range VDD1_ranges[] = {
364 REGULATOR_LINEAR_RANGE(600000, 0, 68, 12500)
365};
366
367/* 600mV to 1450mV in 12.5 mV steps, everything above = 1500mV */
368static const struct linear_range VDD2_ranges[] = {
369 REGULATOR_LINEAR_RANGE(600000, 0, 68, 12500),
370 REGULATOR_LINEAR_RANGE(1500000, 69, 69, 12500)
371};
372
373static int twl4030ldo_list_voltage(struct regulator_dev *rdev, unsigned index)
374{
375 struct twlreg_info *info = rdev_get_drvdata(rdev);
376 int mV = info->table[index];
377
378 return IS_UNSUP(info, mV) ? 0 : (LDO_MV(mV) * 1000);
379}
380
381static int
382twl4030ldo_set_voltage_sel(struct regulator_dev *rdev, unsigned selector)
383{
384 struct twlreg_info *info = rdev_get_drvdata(rdev);
385
386 return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE,
387 selector);
388}
389
390static int twl4030ldo_get_voltage_sel(struct regulator_dev *rdev)
391{
392 struct twlreg_info *info = rdev_get_drvdata(rdev);
393 int vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE);
394
395 if (vsel < 0)
396 return vsel;
397
398 vsel &= info->table_len - 1;
399 return vsel;
400}
401
402static const struct regulator_ops twl4030ldo_ops = {
403 .list_voltage = twl4030ldo_list_voltage,
404
405 .set_voltage_sel = twl4030ldo_set_voltage_sel,
406 .get_voltage_sel = twl4030ldo_get_voltage_sel,
407
408 .enable = twl4030reg_enable,
409 .disable = twl4030reg_disable,
410 .is_enabled = twl4030reg_is_enabled,
411
412 .set_mode = twl4030reg_set_mode,
413
414 .get_status = twl4030reg_get_status,
415};
416
417static int
418twl4030smps_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV,
419 unsigned *selector)
420{
421 struct twlreg_info *info = rdev_get_drvdata(rdev);
422 int vsel = DIV_ROUND_UP(min_uV - 600000, 12500);
423
424 twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE_SMPS_4030, vsel);
425
426 return 0;
427}
428
429static int twl4030smps_get_voltage(struct regulator_dev *rdev)
430{
431 struct twlreg_info *info = rdev_get_drvdata(rdev);
432 int vsel;
433
434 vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER,
435 VREG_VOLTAGE_SMPS_4030);
436
437 return vsel * 12500 + 600000;
438}
439
440static const struct regulator_ops twl4030smps_ops = {
441 .list_voltage = regulator_list_voltage_linear_range,
442
443 .set_voltage = twl4030smps_set_voltage,
444 .get_voltage = twl4030smps_get_voltage,
445};
446
447/*----------------------------------------------------------------------*/
448
449static const struct regulator_ops twl4030fixed_ops = {
450 .list_voltage = regulator_list_voltage_linear,
451
452 .enable = twl4030reg_enable,
453 .disable = twl4030reg_disable,
454 .is_enabled = twl4030reg_is_enabled,
455
456 .set_mode = twl4030reg_set_mode,
457
458 .get_status = twl4030reg_get_status,
459};
460
461/*----------------------------------------------------------------------*/
462
463#define TWL4030_ADJUSTABLE_LDO(label, offset, num, turnon_delay, remap_conf) \
464static const struct twlreg_info TWL4030_INFO_##label = { \
465 .base = offset, \
466 .id = num, \
467 .table_len = ARRAY_SIZE(label##_VSEL_table), \
468 .table = label##_VSEL_table, \
469 .remap = remap_conf, \
470 .desc = { \
471 .name = #label, \
472 .id = TWL4030_REG_##label, \
473 .n_voltages = ARRAY_SIZE(label##_VSEL_table), \
474 .ops = &twl4030ldo_ops, \
475 .type = REGULATOR_VOLTAGE, \
476 .owner = THIS_MODULE, \
477 .enable_time = turnon_delay, \
478 .of_map_mode = twl4030reg_map_mode, \
479 }, \
480 }
481
482#define TWL4030_ADJUSTABLE_SMPS(label, offset, num, turnon_delay, remap_conf, \
483 n_volt) \
484static const struct twlreg_info TWL4030_INFO_##label = { \
485 .base = offset, \
486 .id = num, \
487 .remap = remap_conf, \
488 .desc = { \
489 .name = #label, \
490 .id = TWL4030_REG_##label, \
491 .ops = &twl4030smps_ops, \
492 .type = REGULATOR_VOLTAGE, \
493 .owner = THIS_MODULE, \
494 .enable_time = turnon_delay, \
495 .of_map_mode = twl4030reg_map_mode, \
496 .n_voltages = n_volt, \
497 .n_linear_ranges = ARRAY_SIZE(label ## _ranges), \
498 .linear_ranges = label ## _ranges, \
499 }, \
500 }
501
502#define TWL4030_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \
503 remap_conf) \
504static const struct twlreg_info TWLFIXED_INFO_##label = { \
505 .base = offset, \
506 .id = num, \
507 .remap = remap_conf, \
508 .desc = { \
509 .name = #label, \
510 .id = TWL4030##_REG_##label, \
511 .n_voltages = 1, \
512 .ops = &twl4030fixed_ops, \
513 .type = REGULATOR_VOLTAGE, \
514 .owner = THIS_MODULE, \
515 .min_uV = mVolts * 1000, \
516 .enable_time = turnon_delay, \
517 .of_map_mode = twl4030reg_map_mode, \
518 }, \
519 }
520
521/*
522 * We list regulators here if systems need some level of
523 * software control over them after boot.
524 */
525TWL4030_ADJUSTABLE_LDO(VAUX1, 0x17, 1, 100, 0x08);
526TWL4030_ADJUSTABLE_LDO(VAUX2_4030, 0x1b, 2, 100, 0x08);
527TWL4030_ADJUSTABLE_LDO(VAUX2, 0x1b, 2, 100, 0x08);
528TWL4030_ADJUSTABLE_LDO(VAUX3, 0x1f, 3, 100, 0x08);
529TWL4030_ADJUSTABLE_LDO(VAUX4, 0x23, 4, 100, 0x08);
530TWL4030_ADJUSTABLE_LDO(VMMC1, 0x27, 5, 100, 0x08);
531TWL4030_ADJUSTABLE_LDO(VMMC2, 0x2b, 6, 100, 0x08);
532TWL4030_ADJUSTABLE_LDO(VPLL1, 0x2f, 7, 100, 0x00);
533TWL4030_ADJUSTABLE_LDO(VPLL2, 0x33, 8, 100, 0x08);
534TWL4030_ADJUSTABLE_LDO(VSIM, 0x37, 9, 100, 0x00);
535TWL4030_ADJUSTABLE_LDO(VDAC, 0x3b, 10, 100, 0x08);
536TWL4030_ADJUSTABLE_LDO(VINTANA2, 0x43, 12, 100, 0x08);
537TWL4030_ADJUSTABLE_LDO(VIO, 0x4b, 14, 1000, 0x08);
538TWL4030_ADJUSTABLE_SMPS(VDD1, 0x55, 15, 1000, 0x08, 68);
539TWL4030_ADJUSTABLE_SMPS(VDD2, 0x63, 16, 1000, 0x08, 69);
540/* VUSBCP is managed *only* by the USB subchip */
541TWL4030_FIXED_LDO(VINTANA1, 0x3f, 1500, 11, 100, 0x08);
542TWL4030_FIXED_LDO(VINTDIG, 0x47, 1500, 13, 100, 0x08);
543TWL4030_FIXED_LDO(VUSB1V5, 0x71, 1500, 17, 100, 0x08);
544TWL4030_FIXED_LDO(VUSB1V8, 0x74, 1800, 18, 100, 0x08);
545TWL4030_FIXED_LDO(VUSB3V1, 0x77, 3100, 19, 150, 0x08);
546
547#define TWL_OF_MATCH(comp, family, label) \
548 { \
549 .compatible = comp, \
550 .data = &family##_INFO_##label, \
551 }
552
553#define TWL4030_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWL4030, label)
554#define TWL6030_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWL6030, label)
555#define TWL6032_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWL6032, label)
556#define TWLFIXED_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWLFIXED, label)
557#define TWLSMPS_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWLSMPS, label)
558
559static const struct of_device_id twl_of_match[] = {
560 TWL4030_OF_MATCH("ti,twl4030-vaux1", VAUX1),
561 TWL4030_OF_MATCH("ti,twl4030-vaux2", VAUX2_4030),
562 TWL4030_OF_MATCH("ti,twl5030-vaux2", VAUX2),
563 TWL4030_OF_MATCH("ti,twl4030-vaux3", VAUX3),
564 TWL4030_OF_MATCH("ti,twl4030-vaux4", VAUX4),
565 TWL4030_OF_MATCH("ti,twl4030-vmmc1", VMMC1),
566 TWL4030_OF_MATCH("ti,twl4030-vmmc2", VMMC2),
567 TWL4030_OF_MATCH("ti,twl4030-vpll1", VPLL1),
568 TWL4030_OF_MATCH("ti,twl4030-vpll2", VPLL2),
569 TWL4030_OF_MATCH("ti,twl4030-vsim", VSIM),
570 TWL4030_OF_MATCH("ti,twl4030-vdac", VDAC),
571 TWL4030_OF_MATCH("ti,twl4030-vintana2", VINTANA2),
572 TWL4030_OF_MATCH("ti,twl4030-vio", VIO),
573 TWL4030_OF_MATCH("ti,twl4030-vdd1", VDD1),
574 TWL4030_OF_MATCH("ti,twl4030-vdd2", VDD2),
575 TWLFIXED_OF_MATCH("ti,twl4030-vintana1", VINTANA1),
576 TWLFIXED_OF_MATCH("ti,twl4030-vintdig", VINTDIG),
577 TWLFIXED_OF_MATCH("ti,twl4030-vusb1v5", VUSB1V5),
578 TWLFIXED_OF_MATCH("ti,twl4030-vusb1v8", VUSB1V8),
579 TWLFIXED_OF_MATCH("ti,twl4030-vusb3v1", VUSB3V1),
580 {},
581};
582MODULE_DEVICE_TABLE(of, twl_of_match);
583
584static int twlreg_probe(struct platform_device *pdev)
585{
586 int id;
587 struct twlreg_info *info;
588 const struct twlreg_info *template;
589 struct regulator_init_data *initdata;
590 struct regulation_constraints *c;
591 struct regulator_dev *rdev;
592 struct regulator_config config = { };
593
594 template = of_device_get_match_data(&pdev->dev);
595 if (!template)
596 return -ENODEV;
597
598 id = template->desc.id;
599 initdata = of_get_regulator_init_data(&pdev->dev, pdev->dev.of_node,
600 &template->desc);
601 if (!initdata)
602 return -EINVAL;
603
604 info = devm_kmemdup(&pdev->dev, template, sizeof(*info), GFP_KERNEL);
605 if (!info)
606 return -ENOMEM;
607
608 /* Constrain board-specific capabilities according to what
609 * this driver and the chip itself can actually do.
610 */
611 c = &initdata->constraints;
612 c->valid_modes_mask &= REGULATOR_MODE_NORMAL | REGULATOR_MODE_STANDBY;
613 c->valid_ops_mask &= REGULATOR_CHANGE_VOLTAGE
614 | REGULATOR_CHANGE_MODE
615 | REGULATOR_CHANGE_STATUS;
616 switch (id) {
617 case TWL4030_REG_VIO:
618 case TWL4030_REG_VDD1:
619 case TWL4030_REG_VDD2:
620 case TWL4030_REG_VPLL1:
621 case TWL4030_REG_VINTANA1:
622 case TWL4030_REG_VINTANA2:
623 case TWL4030_REG_VINTDIG:
624 c->always_on = true;
625 break;
626 default:
627 break;
628 }
629
630 config.dev = &pdev->dev;
631 config.init_data = initdata;
632 config.driver_data = info;
633 config.of_node = pdev->dev.of_node;
634
635 rdev = devm_regulator_register(&pdev->dev, &info->desc, &config);
636 if (IS_ERR(rdev)) {
637 dev_err(&pdev->dev, "can't register %s, %ld\n",
638 info->desc.name, PTR_ERR(rdev));
639 return PTR_ERR(rdev);
640 }
641 platform_set_drvdata(pdev, rdev);
642
643 twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_REMAP, info->remap);
644
645 /* NOTE: many regulators support short-circuit IRQs (presentable
646 * as REGULATOR_OVER_CURRENT notifications?) configured via:
647 * - SC_CONFIG
648 * - SC_DETECT1 (vintana2, vmmc1/2, vaux1/2/3/4)
649 * - SC_DETECT2 (vusb, vdac, vio, vdd1/2, vpll2)
650 * - IT_CONFIG
651 */
652
653 return 0;
654}
655
656MODULE_ALIAS("platform:twl4030_reg");
657
658static struct platform_driver twlreg_driver = {
659 .probe = twlreg_probe,
660 /* NOTE: short name, to work around driver model truncation of
661 * "twl_regulator.12" (and friends) to "twl_regulator.1".
662 */
663 .driver = {
664 .name = "twl4030_reg",
665 .of_match_table = of_match_ptr(twl_of_match),
666 },
667};
668
669static int __init twlreg_init(void)
670{
671 return platform_driver_register(&twlreg_driver);
672}
673subsys_initcall(twlreg_init);
674
675static void __exit twlreg_exit(void)
676{
677 platform_driver_unregister(&twlreg_driver);
678}
679module_exit(twlreg_exit)
680
681MODULE_DESCRIPTION("TWL4030 regulator driver");
682MODULE_LICENSE("GPL");