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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");
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/init.h>
14#include <linux/err.h>
15#include <linux/delay.h>
16#include <linux/platform_device.h>
17#include <linux/regulator/driver.h>
18#include <linux/regulator/machine.h>
19#include <linux/i2c/twl.h>
20
21
22/*
23 * The TWL4030/TW5030/TPS659x0/TWL6030 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 /* regulator specific turn-on delay */
45 u16 delay;
46
47 /* State REMAP default configuration */
48 u8 remap;
49
50 /* chip constraints on regulator behavior */
51 u16 min_mV;
52 u16 max_mV;
53
54 u8 flags;
55
56 /* used by regulator core */
57 struct regulator_desc desc;
58
59 /* chip specific features */
60 unsigned long features;
61};
62
63
64/* LDO control registers ... offset is from the base of its register bank.
65 * The first three registers of all power resource banks help hardware to
66 * manage the various resource groups.
67 */
68/* Common offset in TWL4030/6030 */
69#define VREG_GRP 0
70/* TWL4030 register offsets */
71#define VREG_TYPE 1
72#define VREG_REMAP 2
73#define VREG_DEDICATED 3 /* LDO control */
74/* TWL6030 register offsets */
75#define VREG_TRANS 1
76#define VREG_STATE 2
77#define VREG_VOLTAGE 3
78#define VREG_VOLTAGE_SMPS 4
79/* TWL6030 Misc register offsets */
80#define VREG_BC_ALL 1
81#define VREG_BC_REF 2
82#define VREG_BC_PROC 3
83#define VREG_BC_CLK_RST 4
84
85/* TWL6030 LDO register values for CFG_STATE */
86#define TWL6030_CFG_STATE_OFF 0x00
87#define TWL6030_CFG_STATE_ON 0x01
88#define TWL6030_CFG_STATE_OFF2 0x02
89#define TWL6030_CFG_STATE_SLEEP 0x03
90#define TWL6030_CFG_STATE_GRP_SHIFT 5
91#define TWL6030_CFG_STATE_APP_SHIFT 2
92#define TWL6030_CFG_STATE_APP_MASK (0x03 << TWL6030_CFG_STATE_APP_SHIFT)
93#define TWL6030_CFG_STATE_APP(v) (((v) & TWL6030_CFG_STATE_APP_MASK) >>\
94 TWL6030_CFG_STATE_APP_SHIFT)
95
96/* Flags for SMPS Voltage reading */
97#define SMPS_OFFSET_EN BIT(0)
98#define SMPS_EXTENDED_EN BIT(1)
99
100/* twl6025 SMPS EPROM values */
101#define TWL6030_SMPS_OFFSET 0xB0
102#define TWL6030_SMPS_MULT 0xB3
103#define SMPS_MULTOFFSET_SMPS4 BIT(0)
104#define SMPS_MULTOFFSET_VIO BIT(1)
105#define SMPS_MULTOFFSET_SMPS3 BIT(6)
106
107static inline int
108twlreg_read(struct twlreg_info *info, unsigned slave_subgp, unsigned offset)
109{
110 u8 value;
111 int status;
112
113 status = twl_i2c_read_u8(slave_subgp,
114 &value, info->base + offset);
115 return (status < 0) ? status : value;
116}
117
118static inline int
119twlreg_write(struct twlreg_info *info, unsigned slave_subgp, unsigned offset,
120 u8 value)
121{
122 return twl_i2c_write_u8(slave_subgp,
123 value, info->base + offset);
124}
125
126/*----------------------------------------------------------------------*/
127
128/* generic power resource operations, which work on all regulators */
129
130static int twlreg_grp(struct regulator_dev *rdev)
131{
132 return twlreg_read(rdev_get_drvdata(rdev), TWL_MODULE_PM_RECEIVER,
133 VREG_GRP);
134}
135
136/*
137 * Enable/disable regulators by joining/leaving the P1 (processor) group.
138 * We assume nobody else is updating the DEV_GRP registers.
139 */
140/* definition for 4030 family */
141#define P3_GRP_4030 BIT(7) /* "peripherals" */
142#define P2_GRP_4030 BIT(6) /* secondary processor, modem, etc */
143#define P1_GRP_4030 BIT(5) /* CPU/Linux */
144/* definition for 6030 family */
145#define P3_GRP_6030 BIT(2) /* secondary processor, modem, etc */
146#define P2_GRP_6030 BIT(1) /* "peripherals" */
147#define P1_GRP_6030 BIT(0) /* CPU/Linux */
148
149static int twl4030reg_is_enabled(struct regulator_dev *rdev)
150{
151 int state = twlreg_grp(rdev);
152
153 if (state < 0)
154 return state;
155
156 return state & P1_GRP_4030;
157}
158
159static int twl6030reg_is_enabled(struct regulator_dev *rdev)
160{
161 struct twlreg_info *info = rdev_get_drvdata(rdev);
162 int grp = 0, val;
163
164 if (!(twl_class_is_6030() && (info->features & TWL6025_SUBCLASS)))
165 grp = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_GRP);
166 if (grp < 0)
167 return grp;
168
169 if (!(twl_class_is_6030() && (info->features & TWL6025_SUBCLASS)))
170 grp &= P1_GRP_6030;
171 else
172 grp = 1;
173
174 val = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_STATE);
175 val = TWL6030_CFG_STATE_APP(val);
176
177 return grp && (val == TWL6030_CFG_STATE_ON);
178}
179
180static int twl4030reg_enable(struct regulator_dev *rdev)
181{
182 struct twlreg_info *info = rdev_get_drvdata(rdev);
183 int grp;
184 int ret;
185
186 grp = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_GRP);
187 if (grp < 0)
188 return grp;
189
190 grp |= P1_GRP_4030;
191
192 ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_GRP, grp);
193
194 udelay(info->delay);
195
196 return ret;
197}
198
199static int twl6030reg_enable(struct regulator_dev *rdev)
200{
201 struct twlreg_info *info = rdev_get_drvdata(rdev);
202 int grp = 0;
203 int ret;
204
205 if (!(twl_class_is_6030() && (info->features & TWL6025_SUBCLASS)))
206 grp = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_GRP);
207 if (grp < 0)
208 return grp;
209
210 ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_STATE,
211 grp << TWL6030_CFG_STATE_GRP_SHIFT |
212 TWL6030_CFG_STATE_ON);
213
214 udelay(info->delay);
215
216 return ret;
217}
218
219static int twl4030reg_disable(struct regulator_dev *rdev)
220{
221 struct twlreg_info *info = rdev_get_drvdata(rdev);
222 int grp;
223 int ret;
224
225 grp = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_GRP);
226 if (grp < 0)
227 return grp;
228
229 grp &= ~(P1_GRP_4030 | P2_GRP_4030 | P3_GRP_4030);
230
231 ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_GRP, grp);
232
233 return ret;
234}
235
236static int twl6030reg_disable(struct regulator_dev *rdev)
237{
238 struct twlreg_info *info = rdev_get_drvdata(rdev);
239 int grp = 0;
240 int ret;
241
242 if (!(twl_class_is_6030() && (info->features & TWL6025_SUBCLASS)))
243 grp = P1_GRP_6030 | P2_GRP_6030 | P3_GRP_6030;
244
245 /* For 6030, set the off state for all grps enabled */
246 ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_STATE,
247 (grp) << TWL6030_CFG_STATE_GRP_SHIFT |
248 TWL6030_CFG_STATE_OFF);
249
250 return ret;
251}
252
253static int twl4030reg_get_status(struct regulator_dev *rdev)
254{
255 int state = twlreg_grp(rdev);
256
257 if (state < 0)
258 return state;
259 state &= 0x0f;
260
261 /* assume state != WARM_RESET; we'd not be running... */
262 if (!state)
263 return REGULATOR_STATUS_OFF;
264 return (state & BIT(3))
265 ? REGULATOR_STATUS_NORMAL
266 : REGULATOR_STATUS_STANDBY;
267}
268
269static int twl6030reg_get_status(struct regulator_dev *rdev)
270{
271 struct twlreg_info *info = rdev_get_drvdata(rdev);
272 int val;
273
274 val = twlreg_grp(rdev);
275 if (val < 0)
276 return val;
277
278 val = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_STATE);
279
280 switch (TWL6030_CFG_STATE_APP(val)) {
281 case TWL6030_CFG_STATE_ON:
282 return REGULATOR_STATUS_NORMAL;
283
284 case TWL6030_CFG_STATE_SLEEP:
285 return REGULATOR_STATUS_STANDBY;
286
287 case TWL6030_CFG_STATE_OFF:
288 case TWL6030_CFG_STATE_OFF2:
289 default:
290 break;
291 }
292
293 return REGULATOR_STATUS_OFF;
294}
295
296static int twl4030reg_set_mode(struct regulator_dev *rdev, unsigned mode)
297{
298 struct twlreg_info *info = rdev_get_drvdata(rdev);
299 unsigned message;
300 int status;
301
302 /* We can only set the mode through state machine commands... */
303 switch (mode) {
304 case REGULATOR_MODE_NORMAL:
305 message = MSG_SINGULAR(DEV_GRP_P1, info->id, RES_STATE_ACTIVE);
306 break;
307 case REGULATOR_MODE_STANDBY:
308 message = MSG_SINGULAR(DEV_GRP_P1, info->id, RES_STATE_SLEEP);
309 break;
310 default:
311 return -EINVAL;
312 }
313
314 /* Ensure the resource is associated with some group */
315 status = twlreg_grp(rdev);
316 if (status < 0)
317 return status;
318 if (!(status & (P3_GRP_4030 | P2_GRP_4030 | P1_GRP_4030)))
319 return -EACCES;
320
321 status = twl_i2c_write_u8(TWL_MODULE_PM_MASTER,
322 message >> 8, TWL4030_PM_MASTER_PB_WORD_MSB);
323 if (status < 0)
324 return status;
325
326 return twl_i2c_write_u8(TWL_MODULE_PM_MASTER,
327 message & 0xff, TWL4030_PM_MASTER_PB_WORD_LSB);
328}
329
330static int twl6030reg_set_mode(struct regulator_dev *rdev, unsigned mode)
331{
332 struct twlreg_info *info = rdev_get_drvdata(rdev);
333 int grp = 0;
334 int val;
335
336 if (!(twl_class_is_6030() && (info->features & TWL6025_SUBCLASS)))
337 grp = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_GRP);
338
339 if (grp < 0)
340 return grp;
341
342 /* Compose the state register settings */
343 val = grp << TWL6030_CFG_STATE_GRP_SHIFT;
344 /* We can only set the mode through state machine commands... */
345 switch (mode) {
346 case REGULATOR_MODE_NORMAL:
347 val |= TWL6030_CFG_STATE_ON;
348 break;
349 case REGULATOR_MODE_STANDBY:
350 val |= TWL6030_CFG_STATE_SLEEP;
351 break;
352
353 default:
354 return -EINVAL;
355 }
356
357 return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_STATE, val);
358}
359
360/*----------------------------------------------------------------------*/
361
362/*
363 * Support for adjustable-voltage LDOs uses a four bit (or less) voltage
364 * select field in its control register. We use tables indexed by VSEL
365 * to record voltages in milliVolts. (Accuracy is about three percent.)
366 *
367 * Note that VSEL values for VAUX2 changed in twl5030 and newer silicon;
368 * currently handled by listing two slightly different VAUX2 regulators,
369 * only one of which will be configured.
370 *
371 * VSEL values documented as "TI cannot support these values" are flagged
372 * in these tables as UNSUP() values; we normally won't assign them.
373 *
374 * VAUX3 at 3V is incorrectly listed in some TI manuals as unsupported.
375 * TI are revising the twl5030/tps659x0 specs to support that 3.0V setting.
376 */
377#ifdef CONFIG_TWL4030_ALLOW_UNSUPPORTED
378#define UNSUP_MASK 0x0000
379#else
380#define UNSUP_MASK 0x8000
381#endif
382
383#define UNSUP(x) (UNSUP_MASK | (x))
384#define IS_UNSUP(x) (UNSUP_MASK & (x))
385#define LDO_MV(x) (~UNSUP_MASK & (x))
386
387
388static const u16 VAUX1_VSEL_table[] = {
389 UNSUP(1500), UNSUP(1800), 2500, 2800,
390 3000, 3000, 3000, 3000,
391};
392static const u16 VAUX2_4030_VSEL_table[] = {
393 UNSUP(1000), UNSUP(1000), UNSUP(1200), 1300,
394 1500, 1800, UNSUP(1850), 2500,
395 UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000),
396 UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
397};
398static const u16 VAUX2_VSEL_table[] = {
399 1700, 1700, 1900, 1300,
400 1500, 1800, 2000, 2500,
401 2100, 2800, 2200, 2300,
402 2400, 2400, 2400, 2400,
403};
404static const u16 VAUX3_VSEL_table[] = {
405 1500, 1800, 2500, 2800,
406 3000, 3000, 3000, 3000,
407};
408static const u16 VAUX4_VSEL_table[] = {
409 700, 1000, 1200, UNSUP(1300),
410 1500, 1800, UNSUP(1850), 2500,
411 UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000),
412 UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
413};
414static const u16 VMMC1_VSEL_table[] = {
415 1850, 2850, 3000, 3150,
416};
417static const u16 VMMC2_VSEL_table[] = {
418 UNSUP(1000), UNSUP(1000), UNSUP(1200), UNSUP(1300),
419 UNSUP(1500), UNSUP(1800), 1850, UNSUP(2500),
420 2600, 2800, 2850, 3000,
421 3150, 3150, 3150, 3150,
422};
423static const u16 VPLL1_VSEL_table[] = {
424 1000, 1200, 1300, 1800,
425 UNSUP(2800), UNSUP(3000), UNSUP(3000), UNSUP(3000),
426};
427static const u16 VPLL2_VSEL_table[] = {
428 700, 1000, 1200, 1300,
429 UNSUP(1500), 1800, UNSUP(1850), UNSUP(2500),
430 UNSUP(2600), UNSUP(2800), UNSUP(2850), UNSUP(3000),
431 UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
432};
433static const u16 VSIM_VSEL_table[] = {
434 UNSUP(1000), UNSUP(1200), UNSUP(1300), 1800,
435 2800, 3000, 3000, 3000,
436};
437static const u16 VDAC_VSEL_table[] = {
438 1200, 1300, 1800, 1800,
439};
440static const u16 VDD1_VSEL_table[] = {
441 800, 1450,
442};
443static const u16 VDD2_VSEL_table[] = {
444 800, 1450, 1500,
445};
446static const u16 VIO_VSEL_table[] = {
447 1800, 1850,
448};
449static const u16 VINTANA2_VSEL_table[] = {
450 2500, 2750,
451};
452
453static int twl4030ldo_list_voltage(struct regulator_dev *rdev, unsigned index)
454{
455 struct twlreg_info *info = rdev_get_drvdata(rdev);
456 int mV = info->table[index];
457
458 return IS_UNSUP(mV) ? 0 : (LDO_MV(mV) * 1000);
459}
460
461static int
462twl4030ldo_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV,
463 unsigned *selector)
464{
465 struct twlreg_info *info = rdev_get_drvdata(rdev);
466 int vsel;
467
468 for (vsel = 0; vsel < info->table_len; vsel++) {
469 int mV = info->table[vsel];
470 int uV;
471
472 if (IS_UNSUP(mV))
473 continue;
474 uV = LDO_MV(mV) * 1000;
475
476 /* REVISIT for VAUX2, first match may not be best/lowest */
477
478 /* use the first in-range value */
479 if (min_uV <= uV && uV <= max_uV) {
480 *selector = vsel;
481 return twlreg_write(info, TWL_MODULE_PM_RECEIVER,
482 VREG_VOLTAGE, vsel);
483 }
484 }
485
486 return -EDOM;
487}
488
489static int twl4030ldo_get_voltage(struct regulator_dev *rdev)
490{
491 struct twlreg_info *info = rdev_get_drvdata(rdev);
492 int vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER,
493 VREG_VOLTAGE);
494
495 if (vsel < 0)
496 return vsel;
497
498 vsel &= info->table_len - 1;
499 return LDO_MV(info->table[vsel]) * 1000;
500}
501
502static struct regulator_ops twl4030ldo_ops = {
503 .list_voltage = twl4030ldo_list_voltage,
504
505 .set_voltage = twl4030ldo_set_voltage,
506 .get_voltage = twl4030ldo_get_voltage,
507
508 .enable = twl4030reg_enable,
509 .disable = twl4030reg_disable,
510 .is_enabled = twl4030reg_is_enabled,
511
512 .set_mode = twl4030reg_set_mode,
513
514 .get_status = twl4030reg_get_status,
515};
516
517static int twl6030ldo_list_voltage(struct regulator_dev *rdev, unsigned index)
518{
519 struct twlreg_info *info = rdev_get_drvdata(rdev);
520
521 return ((info->min_mV + (index * 100)) * 1000);
522}
523
524static int
525twl6030ldo_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV,
526 unsigned *selector)
527{
528 struct twlreg_info *info = rdev_get_drvdata(rdev);
529 int vsel;
530
531 if ((min_uV/1000 < info->min_mV) || (max_uV/1000 > info->max_mV))
532 return -EDOM;
533
534 /*
535 * Use the below formula to calculate vsel
536 * mV = 1000mv + 100mv * (vsel - 1)
537 */
538 vsel = (min_uV/1000 - 1000)/100 + 1;
539 *selector = vsel;
540 return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE, vsel);
541
542}
543
544static int twl6030ldo_get_voltage(struct regulator_dev *rdev)
545{
546 struct twlreg_info *info = rdev_get_drvdata(rdev);
547 int vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER,
548 VREG_VOLTAGE);
549
550 if (vsel < 0)
551 return vsel;
552
553 /*
554 * Use the below formula to calculate vsel
555 * mV = 1000mv + 100mv * (vsel - 1)
556 */
557 return (1000 + (100 * (vsel - 1))) * 1000;
558}
559
560static struct regulator_ops twl6030ldo_ops = {
561 .list_voltage = twl6030ldo_list_voltage,
562
563 .set_voltage = twl6030ldo_set_voltage,
564 .get_voltage = twl6030ldo_get_voltage,
565
566 .enable = twl6030reg_enable,
567 .disable = twl6030reg_disable,
568 .is_enabled = twl6030reg_is_enabled,
569
570 .set_mode = twl6030reg_set_mode,
571
572 .get_status = twl6030reg_get_status,
573};
574
575/*----------------------------------------------------------------------*/
576
577/*
578 * Fixed voltage LDOs don't have a VSEL field to update.
579 */
580static int twlfixed_list_voltage(struct regulator_dev *rdev, unsigned index)
581{
582 struct twlreg_info *info = rdev_get_drvdata(rdev);
583
584 return info->min_mV * 1000;
585}
586
587static int twlfixed_get_voltage(struct regulator_dev *rdev)
588{
589 struct twlreg_info *info = rdev_get_drvdata(rdev);
590
591 return info->min_mV * 1000;
592}
593
594static struct regulator_ops twl4030fixed_ops = {
595 .list_voltage = twlfixed_list_voltage,
596
597 .get_voltage = twlfixed_get_voltage,
598
599 .enable = twl4030reg_enable,
600 .disable = twl4030reg_disable,
601 .is_enabled = twl4030reg_is_enabled,
602
603 .set_mode = twl4030reg_set_mode,
604
605 .get_status = twl4030reg_get_status,
606};
607
608static struct regulator_ops twl6030fixed_ops = {
609 .list_voltage = twlfixed_list_voltage,
610
611 .get_voltage = twlfixed_get_voltage,
612
613 .enable = twl6030reg_enable,
614 .disable = twl6030reg_disable,
615 .is_enabled = twl6030reg_is_enabled,
616
617 .set_mode = twl6030reg_set_mode,
618
619 .get_status = twl6030reg_get_status,
620};
621
622static struct regulator_ops twl6030_fixed_resource = {
623 .enable = twl6030reg_enable,
624 .disable = twl6030reg_disable,
625 .is_enabled = twl6030reg_is_enabled,
626 .get_status = twl6030reg_get_status,
627};
628
629/*
630 * SMPS status and control
631 */
632
633static int twl6030smps_list_voltage(struct regulator_dev *rdev, unsigned index)
634{
635 struct twlreg_info *info = rdev_get_drvdata(rdev);
636
637 int voltage = 0;
638
639 switch (info->flags) {
640 case SMPS_OFFSET_EN:
641 voltage = 100000;
642 /* fall through */
643 case 0:
644 switch (index) {
645 case 0:
646 voltage = 0;
647 break;
648 case 58:
649 voltage = 1350 * 1000;
650 break;
651 case 59:
652 voltage = 1500 * 1000;
653 break;
654 case 60:
655 voltage = 1800 * 1000;
656 break;
657 case 61:
658 voltage = 1900 * 1000;
659 break;
660 case 62:
661 voltage = 2100 * 1000;
662 break;
663 default:
664 voltage += (600000 + (12500 * (index - 1)));
665 }
666 break;
667 case SMPS_EXTENDED_EN:
668 switch (index) {
669 case 0:
670 voltage = 0;
671 break;
672 case 58:
673 voltage = 2084 * 1000;
674 break;
675 case 59:
676 voltage = 2315 * 1000;
677 break;
678 case 60:
679 voltage = 2778 * 1000;
680 break;
681 case 61:
682 voltage = 2932 * 1000;
683 break;
684 case 62:
685 voltage = 3241 * 1000;
686 break;
687 default:
688 voltage = (1852000 + (38600 * (index - 1)));
689 }
690 break;
691 case SMPS_OFFSET_EN | SMPS_EXTENDED_EN:
692 switch (index) {
693 case 0:
694 voltage = 0;
695 break;
696 case 58:
697 voltage = 4167 * 1000;
698 break;
699 case 59:
700 voltage = 2315 * 1000;
701 break;
702 case 60:
703 voltage = 2778 * 1000;
704 break;
705 case 61:
706 voltage = 2932 * 1000;
707 break;
708 case 62:
709 voltage = 3241 * 1000;
710 break;
711 default:
712 voltage = (2161000 + (38600 * (index - 1)));
713 }
714 break;
715 }
716
717 return voltage;
718}
719
720static int
721twl6030smps_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV,
722 unsigned int *selector)
723{
724 struct twlreg_info *info = rdev_get_drvdata(rdev);
725 int vsel = 0;
726
727 switch (info->flags) {
728 case 0:
729 if (min_uV == 0)
730 vsel = 0;
731 else if ((min_uV >= 600000) && (max_uV <= 1300000)) {
732 vsel = (min_uV - 600000) / 125;
733 if (vsel % 100)
734 vsel += 100;
735 vsel /= 100;
736 vsel++;
737 }
738 /* Values 1..57 for vsel are linear and can be calculated
739 * values 58..62 are non linear.
740 */
741 else if ((min_uV > 1900000) && (max_uV >= 2100000))
742 vsel = 62;
743 else if ((min_uV > 1800000) && (max_uV >= 1900000))
744 vsel = 61;
745 else if ((min_uV > 1500000) && (max_uV >= 1800000))
746 vsel = 60;
747 else if ((min_uV > 1350000) && (max_uV >= 1500000))
748 vsel = 59;
749 else if ((min_uV > 1300000) && (max_uV >= 1350000))
750 vsel = 58;
751 else
752 return -EINVAL;
753 break;
754 case SMPS_OFFSET_EN:
755 if (min_uV == 0)
756 vsel = 0;
757 else if ((min_uV >= 700000) && (max_uV <= 1420000)) {
758 vsel = (min_uV - 700000) / 125;
759 if (vsel % 100)
760 vsel += 100;
761 vsel /= 100;
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) && (max_uV >= 2100000))
768 vsel = 62;
769 else if ((min_uV > 1800000) && (max_uV >= 1900000))
770 vsel = 61;
771 else if ((min_uV > 1350000) && (max_uV >= 1800000))
772 vsel = 60;
773 else if ((min_uV > 1350000) && (max_uV >= 1500000))
774 vsel = 59;
775 else if ((min_uV > 1300000) && (max_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 = (min_uV - 1852000) / 386;
785 if (vsel % 100)
786 vsel += 100;
787 vsel /= 100;
788 vsel++;
789 }
790 break;
791 case SMPS_OFFSET_EN|SMPS_EXTENDED_EN:
792 if (min_uV == 0)
793 vsel = 0;
794 else if ((min_uV >= 2161000) && (max_uV <= 4321000)) {
795 vsel = (min_uV - 1852000) / 386;
796 if (vsel % 100)
797 vsel += 100;
798 vsel /= 100;
799 vsel++;
800 }
801 break;
802 }
803
804 *selector = vsel;
805
806 return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE_SMPS,
807 vsel);
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
820 .set_voltage = twl6030smps_set_voltage,
821 .get_voltage_sel = twl6030smps_get_voltage_sel,
822
823 .enable = twl6030reg_enable,
824 .disable = twl6030reg_disable,
825 .is_enabled = twl6030reg_is_enabled,
826
827 .set_mode = twl6030reg_set_mode,
828
829 .get_status = twl6030reg_get_status,
830};
831
832/*----------------------------------------------------------------------*/
833
834#define TWL4030_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \
835 remap_conf) \
836 TWL_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \
837 remap_conf, TWL4030, twl4030fixed_ops)
838#define TWL6030_FIXED_LDO(label, offset, mVolts, turnon_delay) \
839 TWL_FIXED_LDO(label, offset, mVolts, 0x0, turnon_delay, \
840 0x0, TWL6030, twl6030fixed_ops)
841
842#define TWL4030_ADJUSTABLE_LDO(label, offset, num, turnon_delay, remap_conf) { \
843 .base = offset, \
844 .id = num, \
845 .table_len = ARRAY_SIZE(label##_VSEL_table), \
846 .table = label##_VSEL_table, \
847 .delay = turnon_delay, \
848 .remap = remap_conf, \
849 .desc = { \
850 .name = #label, \
851 .id = TWL4030_REG_##label, \
852 .n_voltages = ARRAY_SIZE(label##_VSEL_table), \
853 .ops = &twl4030ldo_ops, \
854 .type = REGULATOR_VOLTAGE, \
855 .owner = THIS_MODULE, \
856 }, \
857 }
858
859#define TWL6030_ADJUSTABLE_LDO(label, offset, min_mVolts, max_mVolts) { \
860 .base = offset, \
861 .min_mV = min_mVolts, \
862 .max_mV = max_mVolts, \
863 .desc = { \
864 .name = #label, \
865 .id = TWL6030_REG_##label, \
866 .n_voltages = (max_mVolts - min_mVolts)/100 + 1, \
867 .ops = &twl6030ldo_ops, \
868 .type = REGULATOR_VOLTAGE, \
869 .owner = THIS_MODULE, \
870 }, \
871 }
872
873#define TWL6025_ADJUSTABLE_LDO(label, offset, min_mVolts, max_mVolts) { \
874 .base = offset, \
875 .min_mV = min_mVolts, \
876 .max_mV = max_mVolts, \
877 .desc = { \
878 .name = #label, \
879 .id = TWL6025_REG_##label, \
880 .n_voltages = ((max_mVolts - min_mVolts)/100) + 1, \
881 .ops = &twl6030ldo_ops, \
882 .type = REGULATOR_VOLTAGE, \
883 .owner = THIS_MODULE, \
884 }, \
885 }
886
887#define TWL_FIXED_LDO(label, offset, mVolts, num, turnon_delay, remap_conf, \
888 family, operations) { \
889 .base = offset, \
890 .id = num, \
891 .min_mV = mVolts, \
892 .delay = turnon_delay, \
893 .remap = remap_conf, \
894 .desc = { \
895 .name = #label, \
896 .id = family##_REG_##label, \
897 .n_voltages = 1, \
898 .ops = &operations, \
899 .type = REGULATOR_VOLTAGE, \
900 .owner = THIS_MODULE, \
901 }, \
902 }
903
904#define TWL6030_FIXED_RESOURCE(label, offset, turnon_delay) { \
905 .base = offset, \
906 .delay = turnon_delay, \
907 .desc = { \
908 .name = #label, \
909 .id = TWL6030_REG_##label, \
910 .ops = &twl6030_fixed_resource, \
911 .type = REGULATOR_VOLTAGE, \
912 .owner = THIS_MODULE, \
913 }, \
914 }
915
916#define TWL6025_ADJUSTABLE_SMPS(label, offset) { \
917 .base = offset, \
918 .min_mV = 600, \
919 .max_mV = 2100, \
920 .desc = { \
921 .name = #label, \
922 .id = TWL6025_REG_##label, \
923 .n_voltages = 63, \
924 .ops = &twlsmps_ops, \
925 .type = REGULATOR_VOLTAGE, \
926 .owner = THIS_MODULE, \
927 }, \
928 }
929
930/*
931 * We list regulators here if systems need some level of
932 * software control over them after boot.
933 */
934static struct twlreg_info twl_regs[] = {
935 TWL4030_ADJUSTABLE_LDO(VAUX1, 0x17, 1, 100, 0x08),
936 TWL4030_ADJUSTABLE_LDO(VAUX2_4030, 0x1b, 2, 100, 0x08),
937 TWL4030_ADJUSTABLE_LDO(VAUX2, 0x1b, 2, 100, 0x08),
938 TWL4030_ADJUSTABLE_LDO(VAUX3, 0x1f, 3, 100, 0x08),
939 TWL4030_ADJUSTABLE_LDO(VAUX4, 0x23, 4, 100, 0x08),
940 TWL4030_ADJUSTABLE_LDO(VMMC1, 0x27, 5, 100, 0x08),
941 TWL4030_ADJUSTABLE_LDO(VMMC2, 0x2b, 6, 100, 0x08),
942 TWL4030_ADJUSTABLE_LDO(VPLL1, 0x2f, 7, 100, 0x00),
943 TWL4030_ADJUSTABLE_LDO(VPLL2, 0x33, 8, 100, 0x08),
944 TWL4030_ADJUSTABLE_LDO(VSIM, 0x37, 9, 100, 0x00),
945 TWL4030_ADJUSTABLE_LDO(VDAC, 0x3b, 10, 100, 0x08),
946 TWL4030_FIXED_LDO(VINTANA1, 0x3f, 1500, 11, 100, 0x08),
947 TWL4030_ADJUSTABLE_LDO(VINTANA2, 0x43, 12, 100, 0x08),
948 TWL4030_FIXED_LDO(VINTDIG, 0x47, 1500, 13, 100, 0x08),
949 TWL4030_ADJUSTABLE_LDO(VIO, 0x4b, 14, 1000, 0x08),
950 TWL4030_ADJUSTABLE_LDO(VDD1, 0x55, 15, 1000, 0x08),
951 TWL4030_ADJUSTABLE_LDO(VDD2, 0x63, 16, 1000, 0x08),
952 TWL4030_FIXED_LDO(VUSB1V5, 0x71, 1500, 17, 100, 0x08),
953 TWL4030_FIXED_LDO(VUSB1V8, 0x74, 1800, 18, 100, 0x08),
954 TWL4030_FIXED_LDO(VUSB3V1, 0x77, 3100, 19, 150, 0x08),
955 /* VUSBCP is managed *only* by the USB subchip */
956
957 /* 6030 REG with base as PMC Slave Misc : 0x0030 */
958 /* Turnon-delay and remap configuration values for 6030 are not
959 verified since the specification is not public */
960 TWL6030_ADJUSTABLE_LDO(VAUX1_6030, 0x54, 1000, 3300),
961 TWL6030_ADJUSTABLE_LDO(VAUX2_6030, 0x58, 1000, 3300),
962 TWL6030_ADJUSTABLE_LDO(VAUX3_6030, 0x5c, 1000, 3300),
963 TWL6030_ADJUSTABLE_LDO(VMMC, 0x68, 1000, 3300),
964 TWL6030_ADJUSTABLE_LDO(VPP, 0x6c, 1000, 3300),
965 TWL6030_ADJUSTABLE_LDO(VUSIM, 0x74, 1000, 3300),
966 TWL6030_FIXED_LDO(VANA, 0x50, 2100, 0),
967 TWL6030_FIXED_LDO(VCXIO, 0x60, 1800, 0),
968 TWL6030_FIXED_LDO(VDAC, 0x64, 1800, 0),
969 TWL6030_FIXED_LDO(VUSB, 0x70, 3300, 0),
970 TWL6030_FIXED_RESOURCE(CLK32KG, 0x8C, 0),
971
972 /* 6025 are renamed compared to 6030 versions */
973 TWL6025_ADJUSTABLE_LDO(LDO2, 0x54, 1000, 3300),
974 TWL6025_ADJUSTABLE_LDO(LDO4, 0x58, 1000, 3300),
975 TWL6025_ADJUSTABLE_LDO(LDO3, 0x5c, 1000, 3300),
976 TWL6025_ADJUSTABLE_LDO(LDO5, 0x68, 1000, 3300),
977 TWL6025_ADJUSTABLE_LDO(LDO1, 0x6c, 1000, 3300),
978 TWL6025_ADJUSTABLE_LDO(LDO7, 0x74, 1000, 3300),
979 TWL6025_ADJUSTABLE_LDO(LDO6, 0x60, 1000, 3300),
980 TWL6025_ADJUSTABLE_LDO(LDOLN, 0x64, 1000, 3300),
981 TWL6025_ADJUSTABLE_LDO(LDOUSB, 0x70, 1000, 3300),
982
983 TWL6025_ADJUSTABLE_SMPS(SMPS3, 0x34),
984 TWL6025_ADJUSTABLE_SMPS(SMPS4, 0x10),
985 TWL6025_ADJUSTABLE_SMPS(VIO, 0x16),
986};
987
988static u8 twl_get_smps_offset(void)
989{
990 u8 value;
991
992 twl_i2c_read_u8(TWL_MODULE_PM_RECEIVER, &value,
993 TWL6030_SMPS_OFFSET);
994 return value;
995}
996
997static u8 twl_get_smps_mult(void)
998{
999 u8 value;
1000
1001 twl_i2c_read_u8(TWL_MODULE_PM_RECEIVER, &value,
1002 TWL6030_SMPS_MULT);
1003 return value;
1004}
1005
1006static int __devinit twlreg_probe(struct platform_device *pdev)
1007{
1008 int i;
1009 struct twlreg_info *info;
1010 struct regulator_init_data *initdata;
1011 struct regulation_constraints *c;
1012 struct regulator_dev *rdev;
1013
1014 for (i = 0, info = NULL; i < ARRAY_SIZE(twl_regs); i++) {
1015 if (twl_regs[i].desc.id != pdev->id)
1016 continue;
1017 info = twl_regs + i;
1018 break;
1019 }
1020 if (!info)
1021 return -ENODEV;
1022
1023 initdata = pdev->dev.platform_data;
1024 if (!initdata)
1025 return -EINVAL;
1026
1027 /* copy the features into regulator data */
1028 info->features = (unsigned long)initdata->driver_data;
1029
1030 /* Constrain board-specific capabilities according to what
1031 * this driver and the chip itself can actually do.
1032 */
1033 c = &initdata->constraints;
1034 c->valid_modes_mask &= REGULATOR_MODE_NORMAL | REGULATOR_MODE_STANDBY;
1035 c->valid_ops_mask &= REGULATOR_CHANGE_VOLTAGE
1036 | REGULATOR_CHANGE_MODE
1037 | REGULATOR_CHANGE_STATUS;
1038 switch (pdev->id) {
1039 case TWL4030_REG_VIO:
1040 case TWL4030_REG_VDD1:
1041 case TWL4030_REG_VDD2:
1042 case TWL4030_REG_VPLL1:
1043 case TWL4030_REG_VINTANA1:
1044 case TWL4030_REG_VINTANA2:
1045 case TWL4030_REG_VINTDIG:
1046 c->always_on = true;
1047 break;
1048 default:
1049 break;
1050 }
1051
1052 switch (pdev->id) {
1053 case TWL6025_REG_SMPS3:
1054 if (twl_get_smps_mult() & SMPS_MULTOFFSET_SMPS3)
1055 info->flags |= SMPS_EXTENDED_EN;
1056 if (twl_get_smps_offset() & SMPS_MULTOFFSET_SMPS3)
1057 info->flags |= SMPS_OFFSET_EN;
1058 break;
1059 case TWL6025_REG_SMPS4:
1060 if (twl_get_smps_mult() & SMPS_MULTOFFSET_SMPS4)
1061 info->flags |= SMPS_EXTENDED_EN;
1062 if (twl_get_smps_offset() & SMPS_MULTOFFSET_SMPS4)
1063 info->flags |= SMPS_OFFSET_EN;
1064 break;
1065 case TWL6025_REG_VIO:
1066 if (twl_get_smps_mult() & SMPS_MULTOFFSET_VIO)
1067 info->flags |= SMPS_EXTENDED_EN;
1068 if (twl_get_smps_offset() & SMPS_MULTOFFSET_VIO)
1069 info->flags |= SMPS_OFFSET_EN;
1070 break;
1071 }
1072
1073 rdev = regulator_register(&info->desc, &pdev->dev, initdata, info);
1074 if (IS_ERR(rdev)) {
1075 dev_err(&pdev->dev, "can't register %s, %ld\n",
1076 info->desc.name, PTR_ERR(rdev));
1077 return PTR_ERR(rdev);
1078 }
1079 platform_set_drvdata(pdev, rdev);
1080
1081 if (twl_class_is_4030())
1082 twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_REMAP,
1083 info->remap);
1084
1085 /* NOTE: many regulators support short-circuit IRQs (presentable
1086 * as REGULATOR_OVER_CURRENT notifications?) configured via:
1087 * - SC_CONFIG
1088 * - SC_DETECT1 (vintana2, vmmc1/2, vaux1/2/3/4)
1089 * - SC_DETECT2 (vusb, vdac, vio, vdd1/2, vpll2)
1090 * - IT_CONFIG
1091 */
1092
1093 return 0;
1094}
1095
1096static int __devexit twlreg_remove(struct platform_device *pdev)
1097{
1098 regulator_unregister(platform_get_drvdata(pdev));
1099 return 0;
1100}
1101
1102MODULE_ALIAS("platform:twl_reg");
1103
1104static struct platform_driver twlreg_driver = {
1105 .probe = twlreg_probe,
1106 .remove = __devexit_p(twlreg_remove),
1107 /* NOTE: short name, to work around driver model truncation of
1108 * "twl_regulator.12" (and friends) to "twl_regulator.1".
1109 */
1110 .driver.name = "twl_reg",
1111 .driver.owner = THIS_MODULE,
1112};
1113
1114static int __init twlreg_init(void)
1115{
1116 return platform_driver_register(&twlreg_driver);
1117}
1118subsys_initcall(twlreg_init);
1119
1120static void __exit twlreg_exit(void)
1121{
1122 platform_driver_unregister(&twlreg_driver);
1123}
1124module_exit(twlreg_exit)
1125
1126MODULE_DESCRIPTION("TWL regulator driver");
1127MODULE_LICENSE("GPL");