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Merge remote-tracking branch 'asoc/fix/core' into asoc-linus
[deliverable/linux.git] / drivers / regulator / palmas-regulator.c
1 /*
2 * Driver for Regulator part of Palmas PMIC Chips
3 *
4 * Copyright 2011-2013 Texas Instruments Inc.
5 *
6 * Author: Graeme Gregory <gg@slimlogic.co.uk>
7 * Author: Ian Lartey <ian@slimlogic.co.uk>
8 *
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
13 *
14 */
15
16 #include <linux/kernel.h>
17 #include <linux/module.h>
18 #include <linux/init.h>
19 #include <linux/err.h>
20 #include <linux/platform_device.h>
21 #include <linux/regulator/driver.h>
22 #include <linux/regulator/machine.h>
23 #include <linux/slab.h>
24 #include <linux/regmap.h>
25 #include <linux/mfd/palmas.h>
26 #include <linux/of.h>
27 #include <linux/of_platform.h>
28 #include <linux/regulator/of_regulator.h>
29
30 struct regs_info {
31 char *name;
32 char *sname;
33 u8 vsel_addr;
34 u8 ctrl_addr;
35 u8 tstep_addr;
36 };
37
38 static const struct regs_info palmas_regs_info[] = {
39 {
40 .name = "SMPS12",
41 .sname = "smps1-in",
42 .vsel_addr = PALMAS_SMPS12_VOLTAGE,
43 .ctrl_addr = PALMAS_SMPS12_CTRL,
44 .tstep_addr = PALMAS_SMPS12_TSTEP,
45 },
46 {
47 .name = "SMPS123",
48 .sname = "smps1-in",
49 .vsel_addr = PALMAS_SMPS12_VOLTAGE,
50 .ctrl_addr = PALMAS_SMPS12_CTRL,
51 .tstep_addr = PALMAS_SMPS12_TSTEP,
52 },
53 {
54 .name = "SMPS3",
55 .sname = "smps3-in",
56 .vsel_addr = PALMAS_SMPS3_VOLTAGE,
57 .ctrl_addr = PALMAS_SMPS3_CTRL,
58 },
59 {
60 .name = "SMPS45",
61 .sname = "smps4-in",
62 .vsel_addr = PALMAS_SMPS45_VOLTAGE,
63 .ctrl_addr = PALMAS_SMPS45_CTRL,
64 .tstep_addr = PALMAS_SMPS45_TSTEP,
65 },
66 {
67 .name = "SMPS457",
68 .sname = "smps4-in",
69 .vsel_addr = PALMAS_SMPS45_VOLTAGE,
70 .ctrl_addr = PALMAS_SMPS45_CTRL,
71 .tstep_addr = PALMAS_SMPS45_TSTEP,
72 },
73 {
74 .name = "SMPS6",
75 .sname = "smps6-in",
76 .vsel_addr = PALMAS_SMPS6_VOLTAGE,
77 .ctrl_addr = PALMAS_SMPS6_CTRL,
78 .tstep_addr = PALMAS_SMPS6_TSTEP,
79 },
80 {
81 .name = "SMPS7",
82 .sname = "smps7-in",
83 .vsel_addr = PALMAS_SMPS7_VOLTAGE,
84 .ctrl_addr = PALMAS_SMPS7_CTRL,
85 },
86 {
87 .name = "SMPS8",
88 .sname = "smps8-in",
89 .vsel_addr = PALMAS_SMPS8_VOLTAGE,
90 .ctrl_addr = PALMAS_SMPS8_CTRL,
91 .tstep_addr = PALMAS_SMPS8_TSTEP,
92 },
93 {
94 .name = "SMPS9",
95 .sname = "smps9-in",
96 .vsel_addr = PALMAS_SMPS9_VOLTAGE,
97 .ctrl_addr = PALMAS_SMPS9_CTRL,
98 },
99 {
100 .name = "SMPS10_OUT2",
101 .sname = "smps10-in",
102 .ctrl_addr = PALMAS_SMPS10_CTRL,
103 },
104 {
105 .name = "SMPS10_OUT1",
106 .sname = "smps10-out2",
107 .ctrl_addr = PALMAS_SMPS10_CTRL,
108 },
109 {
110 .name = "LDO1",
111 .sname = "ldo1-in",
112 .vsel_addr = PALMAS_LDO1_VOLTAGE,
113 .ctrl_addr = PALMAS_LDO1_CTRL,
114 },
115 {
116 .name = "LDO2",
117 .sname = "ldo2-in",
118 .vsel_addr = PALMAS_LDO2_VOLTAGE,
119 .ctrl_addr = PALMAS_LDO2_CTRL,
120 },
121 {
122 .name = "LDO3",
123 .sname = "ldo3-in",
124 .vsel_addr = PALMAS_LDO3_VOLTAGE,
125 .ctrl_addr = PALMAS_LDO3_CTRL,
126 },
127 {
128 .name = "LDO4",
129 .sname = "ldo4-in",
130 .vsel_addr = PALMAS_LDO4_VOLTAGE,
131 .ctrl_addr = PALMAS_LDO4_CTRL,
132 },
133 {
134 .name = "LDO5",
135 .sname = "ldo5-in",
136 .vsel_addr = PALMAS_LDO5_VOLTAGE,
137 .ctrl_addr = PALMAS_LDO5_CTRL,
138 },
139 {
140 .name = "LDO6",
141 .sname = "ldo6-in",
142 .vsel_addr = PALMAS_LDO6_VOLTAGE,
143 .ctrl_addr = PALMAS_LDO6_CTRL,
144 },
145 {
146 .name = "LDO7",
147 .sname = "ldo7-in",
148 .vsel_addr = PALMAS_LDO7_VOLTAGE,
149 .ctrl_addr = PALMAS_LDO7_CTRL,
150 },
151 {
152 .name = "LDO8",
153 .sname = "ldo8-in",
154 .vsel_addr = PALMAS_LDO8_VOLTAGE,
155 .ctrl_addr = PALMAS_LDO8_CTRL,
156 },
157 {
158 .name = "LDO9",
159 .sname = "ldo9-in",
160 .vsel_addr = PALMAS_LDO9_VOLTAGE,
161 .ctrl_addr = PALMAS_LDO9_CTRL,
162 },
163 {
164 .name = "LDOLN",
165 .sname = "ldoln-in",
166 .vsel_addr = PALMAS_LDOLN_VOLTAGE,
167 .ctrl_addr = PALMAS_LDOLN_CTRL,
168 },
169 {
170 .name = "LDOUSB",
171 .sname = "ldousb-in",
172 .vsel_addr = PALMAS_LDOUSB_VOLTAGE,
173 .ctrl_addr = PALMAS_LDOUSB_CTRL,
174 },
175 {
176 .name = "REGEN1",
177 .ctrl_addr = PALMAS_REGEN1_CTRL,
178 },
179 {
180 .name = "REGEN2",
181 .ctrl_addr = PALMAS_REGEN2_CTRL,
182 },
183 {
184 .name = "REGEN3",
185 .ctrl_addr = PALMAS_REGEN3_CTRL,
186 },
187 {
188 .name = "SYSEN1",
189 .ctrl_addr = PALMAS_SYSEN1_CTRL,
190 },
191 {
192 .name = "SYSEN2",
193 .ctrl_addr = PALMAS_SYSEN2_CTRL,
194 },
195 };
196
197 static unsigned int palmas_smps_ramp_delay[4] = {0, 10000, 5000, 2500};
198
199 #define SMPS_CTRL_MODE_OFF 0x00
200 #define SMPS_CTRL_MODE_ON 0x01
201 #define SMPS_CTRL_MODE_ECO 0x02
202 #define SMPS_CTRL_MODE_PWM 0x03
203
204 /* These values are derived from the data sheet. And are the number of steps
205 * where there is a voltage change, the ranges at beginning and end of register
206 * max/min values where there are no change are ommitted.
207 *
208 * So they are basically (maxV-minV)/stepV
209 */
210 #define PALMAS_SMPS_NUM_VOLTAGES 117
211 #define PALMAS_SMPS10_NUM_VOLTAGES 2
212 #define PALMAS_LDO_NUM_VOLTAGES 50
213
214 #define SMPS10_VSEL (1<<3)
215 #define SMPS10_BOOST_EN (1<<2)
216 #define SMPS10_BYPASS_EN (1<<1)
217 #define SMPS10_SWITCH_EN (1<<0)
218
219 #define REGULATOR_SLAVE 0
220
221 static int palmas_smps_read(struct palmas *palmas, unsigned int reg,
222 unsigned int *dest)
223 {
224 unsigned int addr;
225
226 addr = PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, reg);
227
228 return regmap_read(palmas->regmap[REGULATOR_SLAVE], addr, dest);
229 }
230
231 static int palmas_smps_write(struct palmas *palmas, unsigned int reg,
232 unsigned int value)
233 {
234 unsigned int addr;
235
236 addr = PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, reg);
237
238 return regmap_write(palmas->regmap[REGULATOR_SLAVE], addr, value);
239 }
240
241 static int palmas_ldo_read(struct palmas *palmas, unsigned int reg,
242 unsigned int *dest)
243 {
244 unsigned int addr;
245
246 addr = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE, reg);
247
248 return regmap_read(palmas->regmap[REGULATOR_SLAVE], addr, dest);
249 }
250
251 static int palmas_ldo_write(struct palmas *palmas, unsigned int reg,
252 unsigned int value)
253 {
254 unsigned int addr;
255
256 addr = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE, reg);
257
258 return regmap_write(palmas->regmap[REGULATOR_SLAVE], addr, value);
259 }
260
261 static int palmas_is_enabled_smps(struct regulator_dev *dev)
262 {
263 struct palmas_pmic *pmic = rdev_get_drvdata(dev);
264 int id = rdev_get_id(dev);
265 unsigned int reg;
266
267 palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
268
269 reg &= PALMAS_SMPS12_CTRL_STATUS_MASK;
270 reg >>= PALMAS_SMPS12_CTRL_STATUS_SHIFT;
271
272 return !!(reg);
273 }
274
275 static int palmas_enable_smps(struct regulator_dev *dev)
276 {
277 struct palmas_pmic *pmic = rdev_get_drvdata(dev);
278 int id = rdev_get_id(dev);
279 unsigned int reg;
280
281 palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
282
283 reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
284 if (pmic->current_reg_mode[id])
285 reg |= pmic->current_reg_mode[id];
286 else
287 reg |= SMPS_CTRL_MODE_ON;
288
289 palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg);
290
291 return 0;
292 }
293
294 static int palmas_disable_smps(struct regulator_dev *dev)
295 {
296 struct palmas_pmic *pmic = rdev_get_drvdata(dev);
297 int id = rdev_get_id(dev);
298 unsigned int reg;
299
300 palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
301
302 reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
303
304 palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg);
305
306 return 0;
307 }
308
309 static int palmas_set_mode_smps(struct regulator_dev *dev, unsigned int mode)
310 {
311 struct palmas_pmic *pmic = rdev_get_drvdata(dev);
312 int id = rdev_get_id(dev);
313 unsigned int reg;
314 bool rail_enable = true;
315
316 palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
317 reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
318
319 if (reg == SMPS_CTRL_MODE_OFF)
320 rail_enable = false;
321
322 switch (mode) {
323 case REGULATOR_MODE_NORMAL:
324 reg |= SMPS_CTRL_MODE_ON;
325 break;
326 case REGULATOR_MODE_IDLE:
327 reg |= SMPS_CTRL_MODE_ECO;
328 break;
329 case REGULATOR_MODE_FAST:
330 reg |= SMPS_CTRL_MODE_PWM;
331 break;
332 default:
333 return -EINVAL;
334 }
335
336 pmic->current_reg_mode[id] = reg & PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
337 if (rail_enable)
338 palmas_smps_write(pmic->palmas,
339 palmas_regs_info[id].ctrl_addr, reg);
340 return 0;
341 }
342
343 static unsigned int palmas_get_mode_smps(struct regulator_dev *dev)
344 {
345 struct palmas_pmic *pmic = rdev_get_drvdata(dev);
346 int id = rdev_get_id(dev);
347 unsigned int reg;
348
349 reg = pmic->current_reg_mode[id] & PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
350
351 switch (reg) {
352 case SMPS_CTRL_MODE_ON:
353 return REGULATOR_MODE_NORMAL;
354 case SMPS_CTRL_MODE_ECO:
355 return REGULATOR_MODE_IDLE;
356 case SMPS_CTRL_MODE_PWM:
357 return REGULATOR_MODE_FAST;
358 }
359
360 return 0;
361 }
362
363 static int palmas_list_voltage_smps(struct regulator_dev *dev,
364 unsigned selector)
365 {
366 struct palmas_pmic *pmic = rdev_get_drvdata(dev);
367 int id = rdev_get_id(dev);
368 int mult = 1;
369
370 /* Read the multiplier set in VSEL register to return
371 * the correct voltage.
372 */
373 if (pmic->range[id])
374 mult = 2;
375
376 if (selector == 0)
377 return 0;
378 else if (selector < 6)
379 return 500000 * mult;
380 else
381 /* Voltage is linear mapping starting from selector 6,
382 * volt = (0.49V + ((selector - 5) * 0.01V)) * RANGE
383 * RANGE is either x1 or x2
384 */
385 return (490000 + ((selector - 5) * 10000)) * mult;
386 }
387
388 static int palmas_map_voltage_smps(struct regulator_dev *rdev,
389 int min_uV, int max_uV)
390 {
391 struct palmas_pmic *pmic = rdev_get_drvdata(rdev);
392 int id = rdev_get_id(rdev);
393 int ret, voltage;
394
395 if (min_uV == 0)
396 return 0;
397
398 if (pmic->range[id]) { /* RANGE is x2 */
399 if (min_uV < 1000000)
400 min_uV = 1000000;
401 ret = DIV_ROUND_UP(min_uV - 1000000, 20000) + 6;
402 } else { /* RANGE is x1 */
403 if (min_uV < 500000)
404 min_uV = 500000;
405 ret = DIV_ROUND_UP(min_uV - 500000, 10000) + 6;
406 }
407
408 /* Map back into a voltage to verify we're still in bounds */
409 voltage = palmas_list_voltage_smps(rdev, ret);
410 if (voltage < min_uV || voltage > max_uV)
411 return -EINVAL;
412
413 return ret;
414 }
415
416 static int palma_smps_set_voltage_smps_time_sel(struct regulator_dev *rdev,
417 unsigned int old_selector, unsigned int new_selector)
418 {
419 struct palmas_pmic *pmic = rdev_get_drvdata(rdev);
420 int id = rdev_get_id(rdev);
421 int old_uv, new_uv;
422 unsigned int ramp_delay = pmic->ramp_delay[id];
423
424 if (!ramp_delay)
425 return 0;
426
427 old_uv = palmas_list_voltage_smps(rdev, old_selector);
428 if (old_uv < 0)
429 return old_uv;
430
431 new_uv = palmas_list_voltage_smps(rdev, new_selector);
432 if (new_uv < 0)
433 return new_uv;
434
435 return DIV_ROUND_UP(abs(old_uv - new_uv), ramp_delay);
436 }
437
438 static int palmas_smps_set_ramp_delay(struct regulator_dev *rdev,
439 int ramp_delay)
440 {
441 struct palmas_pmic *pmic = rdev_get_drvdata(rdev);
442 int id = rdev_get_id(rdev);
443 unsigned int reg = 0;
444 unsigned int addr = palmas_regs_info[id].tstep_addr;
445 int ret;
446
447 /* SMPS3 and SMPS7 do not have tstep_addr setting */
448 switch (id) {
449 case PALMAS_REG_SMPS3:
450 case PALMAS_REG_SMPS7:
451 return 0;
452 }
453
454 if (ramp_delay <= 0)
455 reg = 0;
456 else if (ramp_delay <= 2500)
457 reg = 3;
458 else if (ramp_delay <= 5000)
459 reg = 2;
460 else
461 reg = 1;
462
463 ret = palmas_smps_write(pmic->palmas, addr, reg);
464 if (ret < 0) {
465 dev_err(pmic->palmas->dev, "TSTEP write failed: %d\n", ret);
466 return ret;
467 }
468
469 pmic->ramp_delay[id] = palmas_smps_ramp_delay[reg];
470 return ret;
471 }
472
473 static struct regulator_ops palmas_ops_smps = {
474 .is_enabled = palmas_is_enabled_smps,
475 .enable = palmas_enable_smps,
476 .disable = palmas_disable_smps,
477 .set_mode = palmas_set_mode_smps,
478 .get_mode = palmas_get_mode_smps,
479 .get_voltage_sel = regulator_get_voltage_sel_regmap,
480 .set_voltage_sel = regulator_set_voltage_sel_regmap,
481 .list_voltage = palmas_list_voltage_smps,
482 .map_voltage = palmas_map_voltage_smps,
483 .set_voltage_time_sel = palma_smps_set_voltage_smps_time_sel,
484 .set_ramp_delay = palmas_smps_set_ramp_delay,
485 };
486
487 static struct regulator_ops palmas_ops_smps10 = {
488 .is_enabled = regulator_is_enabled_regmap,
489 .enable = regulator_enable_regmap,
490 .disable = regulator_disable_regmap,
491 .get_voltage_sel = regulator_get_voltage_sel_regmap,
492 .set_voltage_sel = regulator_set_voltage_sel_regmap,
493 .list_voltage = regulator_list_voltage_linear,
494 .map_voltage = regulator_map_voltage_linear,
495 .set_bypass = regulator_set_bypass_regmap,
496 .get_bypass = regulator_get_bypass_regmap,
497 };
498
499 static int palmas_is_enabled_ldo(struct regulator_dev *dev)
500 {
501 struct palmas_pmic *pmic = rdev_get_drvdata(dev);
502 int id = rdev_get_id(dev);
503 unsigned int reg;
504
505 palmas_ldo_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
506
507 reg &= PALMAS_LDO1_CTRL_STATUS;
508
509 return !!(reg);
510 }
511
512 static struct regulator_ops palmas_ops_ldo = {
513 .is_enabled = palmas_is_enabled_ldo,
514 .enable = regulator_enable_regmap,
515 .disable = regulator_disable_regmap,
516 .get_voltage_sel = regulator_get_voltage_sel_regmap,
517 .set_voltage_sel = regulator_set_voltage_sel_regmap,
518 .list_voltage = regulator_list_voltage_linear,
519 .map_voltage = regulator_map_voltage_linear,
520 };
521
522 static struct regulator_ops palmas_ops_extreg = {
523 .is_enabled = regulator_is_enabled_regmap,
524 .enable = regulator_enable_regmap,
525 .disable = regulator_disable_regmap,
526 };
527
528 /*
529 * setup the hardware based sleep configuration of the SMPS/LDO regulators
530 * from the platform data. This is different to the software based control
531 * supported by the regulator framework as it is controlled by toggling
532 * pins on the PMIC such as PREQ, SYSEN, ...
533 */
534 static int palmas_smps_init(struct palmas *palmas, int id,
535 struct palmas_reg_init *reg_init)
536 {
537 unsigned int reg;
538 unsigned int addr;
539 int ret;
540
541 addr = palmas_regs_info[id].ctrl_addr;
542
543 ret = palmas_smps_read(palmas, addr, &reg);
544 if (ret)
545 return ret;
546
547 switch (id) {
548 case PALMAS_REG_SMPS10_OUT1:
549 case PALMAS_REG_SMPS10_OUT2:
550 reg &= ~PALMAS_SMPS10_CTRL_MODE_SLEEP_MASK;
551 if (reg_init->mode_sleep)
552 reg |= reg_init->mode_sleep <<
553 PALMAS_SMPS10_CTRL_MODE_SLEEP_SHIFT;
554 break;
555 default:
556 if (reg_init->warm_reset)
557 reg |= PALMAS_SMPS12_CTRL_WR_S;
558 else
559 reg &= ~PALMAS_SMPS12_CTRL_WR_S;
560
561 if (reg_init->roof_floor)
562 reg |= PALMAS_SMPS12_CTRL_ROOF_FLOOR_EN;
563 else
564 reg &= ~PALMAS_SMPS12_CTRL_ROOF_FLOOR_EN;
565
566 reg &= ~PALMAS_SMPS12_CTRL_MODE_SLEEP_MASK;
567 if (reg_init->mode_sleep)
568 reg |= reg_init->mode_sleep <<
569 PALMAS_SMPS12_CTRL_MODE_SLEEP_SHIFT;
570 }
571
572 ret = palmas_smps_write(palmas, addr, reg);
573 if (ret)
574 return ret;
575
576 if (palmas_regs_info[id].vsel_addr && reg_init->vsel) {
577 addr = palmas_regs_info[id].vsel_addr;
578
579 reg = reg_init->vsel;
580
581 ret = palmas_smps_write(palmas, addr, reg);
582 if (ret)
583 return ret;
584 }
585
586
587 return 0;
588 }
589
590 static int palmas_ldo_init(struct palmas *palmas, int id,
591 struct palmas_reg_init *reg_init)
592 {
593 unsigned int reg;
594 unsigned int addr;
595 int ret;
596
597 addr = palmas_regs_info[id].ctrl_addr;
598
599 ret = palmas_ldo_read(palmas, addr, &reg);
600 if (ret)
601 return ret;
602
603 if (reg_init->warm_reset)
604 reg |= PALMAS_LDO1_CTRL_WR_S;
605 else
606 reg &= ~PALMAS_LDO1_CTRL_WR_S;
607
608 if (reg_init->mode_sleep)
609 reg |= PALMAS_LDO1_CTRL_MODE_SLEEP;
610 else
611 reg &= ~PALMAS_LDO1_CTRL_MODE_SLEEP;
612
613 ret = palmas_ldo_write(palmas, addr, reg);
614 if (ret)
615 return ret;
616
617 return 0;
618 }
619
620 static int palmas_extreg_init(struct palmas *palmas, int id,
621 struct palmas_reg_init *reg_init)
622 {
623 unsigned int addr;
624 int ret;
625 unsigned int val = 0;
626
627 addr = palmas_regs_info[id].ctrl_addr;
628
629 if (reg_init->mode_sleep)
630 val = PALMAS_REGEN1_CTRL_MODE_SLEEP;
631
632 ret = palmas_update_bits(palmas, PALMAS_RESOURCE_BASE,
633 addr, PALMAS_REGEN1_CTRL_MODE_SLEEP, val);
634 if (ret < 0) {
635 dev_err(palmas->dev, "Resource reg 0x%02x update failed %d\n",
636 addr, ret);
637 return ret;
638 }
639 return 0;
640 }
641
642 static void palmas_enable_ldo8_track(struct palmas *palmas)
643 {
644 unsigned int reg;
645 unsigned int addr;
646 int ret;
647
648 addr = palmas_regs_info[PALMAS_REG_LDO8].ctrl_addr;
649
650 ret = palmas_ldo_read(palmas, addr, &reg);
651 if (ret) {
652 dev_err(palmas->dev, "Error in reading ldo8 control reg\n");
653 return;
654 }
655
656 reg |= PALMAS_LDO8_CTRL_LDO_TRACKING_EN;
657 ret = palmas_ldo_write(palmas, addr, reg);
658 if (ret < 0) {
659 dev_err(palmas->dev, "Error in enabling tracking mode\n");
660 return;
661 }
662 /*
663 * When SMPS45 is set to off and LDO8 tracking is enabled, the LDO8
664 * output is defined by the LDO8_VOLTAGE.VSEL register divided by two,
665 * and can be set from 0.45 to 1.65 V.
666 */
667 addr = palmas_regs_info[PALMAS_REG_LDO8].vsel_addr;
668 ret = palmas_ldo_read(palmas, addr, &reg);
669 if (ret) {
670 dev_err(palmas->dev, "Error in reading ldo8 voltage reg\n");
671 return;
672 }
673
674 reg = (reg << 1) & PALMAS_LDO8_VOLTAGE_VSEL_MASK;
675 ret = palmas_ldo_write(palmas, addr, reg);
676 if (ret < 0)
677 dev_err(palmas->dev, "Error in setting ldo8 voltage reg\n");
678
679 return;
680 }
681
682 static struct of_regulator_match palmas_matches[] = {
683 { .name = "smps12", },
684 { .name = "smps123", },
685 { .name = "smps3", },
686 { .name = "smps45", },
687 { .name = "smps457", },
688 { .name = "smps6", },
689 { .name = "smps7", },
690 { .name = "smps8", },
691 { .name = "smps9", },
692 { .name = "smps10_out2", },
693 { .name = "smps10_out1", },
694 { .name = "ldo1", },
695 { .name = "ldo2", },
696 { .name = "ldo3", },
697 { .name = "ldo4", },
698 { .name = "ldo5", },
699 { .name = "ldo6", },
700 { .name = "ldo7", },
701 { .name = "ldo8", },
702 { .name = "ldo9", },
703 { .name = "ldoln", },
704 { .name = "ldousb", },
705 { .name = "regen1", },
706 { .name = "regen2", },
707 { .name = "regen3", },
708 { .name = "sysen1", },
709 { .name = "sysen2", },
710 };
711
712 static void palmas_dt_to_pdata(struct device *dev,
713 struct device_node *node,
714 struct palmas_pmic_platform_data *pdata)
715 {
716 struct device_node *regulators;
717 u32 prop;
718 int idx, ret;
719
720 node = of_node_get(node);
721 regulators = of_find_node_by_name(node, "regulators");
722 if (!regulators) {
723 dev_info(dev, "regulator node not found\n");
724 return;
725 }
726
727 ret = of_regulator_match(dev, regulators, palmas_matches,
728 PALMAS_NUM_REGS);
729 of_node_put(regulators);
730 if (ret < 0) {
731 dev_err(dev, "Error parsing regulator init data: %d\n", ret);
732 return;
733 }
734
735 for (idx = 0; idx < PALMAS_NUM_REGS; idx++) {
736 if (!palmas_matches[idx].init_data ||
737 !palmas_matches[idx].of_node)
738 continue;
739
740 pdata->reg_data[idx] = palmas_matches[idx].init_data;
741
742 pdata->reg_init[idx] = devm_kzalloc(dev,
743 sizeof(struct palmas_reg_init), GFP_KERNEL);
744
745 pdata->reg_init[idx]->warm_reset =
746 of_property_read_bool(palmas_matches[idx].of_node,
747 "ti,warm-reset");
748
749 pdata->reg_init[idx]->roof_floor =
750 of_property_read_bool(palmas_matches[idx].of_node,
751 "ti,roof-floor");
752
753 ret = of_property_read_u32(palmas_matches[idx].of_node,
754 "ti,mode-sleep", &prop);
755 if (!ret)
756 pdata->reg_init[idx]->mode_sleep = prop;
757
758 ret = of_property_read_bool(palmas_matches[idx].of_node,
759 "ti,smps-range");
760 if (ret)
761 pdata->reg_init[idx]->vsel =
762 PALMAS_SMPS12_VOLTAGE_RANGE;
763
764 if (idx == PALMAS_REG_LDO8)
765 pdata->enable_ldo8_tracking = of_property_read_bool(
766 palmas_matches[idx].of_node,
767 "ti,enable-ldo8-tracking");
768 }
769
770 pdata->ldo6_vibrator = of_property_read_bool(node, "ti,ldo6-vibrator");
771 }
772
773
774 static int palmas_regulators_probe(struct platform_device *pdev)
775 {
776 struct palmas *palmas = dev_get_drvdata(pdev->dev.parent);
777 struct palmas_pmic_platform_data *pdata = dev_get_platdata(&pdev->dev);
778 struct device_node *node = pdev->dev.of_node;
779 struct regulator_dev *rdev;
780 struct regulator_config config = { };
781 struct palmas_pmic *pmic;
782 struct palmas_reg_init *reg_init;
783 int id = 0, ret;
784 unsigned int addr, reg;
785
786 if (node && !pdata) {
787 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
788
789 if (!pdata)
790 return -ENOMEM;
791
792 palmas_dt_to_pdata(&pdev->dev, node, pdata);
793 }
794
795 pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
796 if (!pmic)
797 return -ENOMEM;
798
799 pmic->dev = &pdev->dev;
800 pmic->palmas = palmas;
801 palmas->pmic = pmic;
802 platform_set_drvdata(pdev, pmic);
803
804 ret = palmas_smps_read(palmas, PALMAS_SMPS_CTRL, &reg);
805 if (ret)
806 return ret;
807
808 if (reg & PALMAS_SMPS_CTRL_SMPS12_SMPS123_EN)
809 pmic->smps123 = 1;
810
811 if (reg & PALMAS_SMPS_CTRL_SMPS45_SMPS457_EN)
812 pmic->smps457 = 1;
813
814 config.regmap = palmas->regmap[REGULATOR_SLAVE];
815 config.dev = &pdev->dev;
816 config.driver_data = pmic;
817
818 for (id = 0; id < PALMAS_REG_LDO1; id++) {
819 bool ramp_delay_support = false;
820
821 /*
822 * Miss out regulators which are not available due
823 * to slaving configurations.
824 */
825 switch (id) {
826 case PALMAS_REG_SMPS12:
827 case PALMAS_REG_SMPS3:
828 if (pmic->smps123)
829 continue;
830 if (id == PALMAS_REG_SMPS12)
831 ramp_delay_support = true;
832 break;
833 case PALMAS_REG_SMPS123:
834 if (!pmic->smps123)
835 continue;
836 ramp_delay_support = true;
837 break;
838 case PALMAS_REG_SMPS45:
839 case PALMAS_REG_SMPS7:
840 if (pmic->smps457)
841 continue;
842 if (id == PALMAS_REG_SMPS45)
843 ramp_delay_support = true;
844 break;
845 case PALMAS_REG_SMPS457:
846 if (!pmic->smps457)
847 continue;
848 ramp_delay_support = true;
849 break;
850 case PALMAS_REG_SMPS10_OUT1:
851 case PALMAS_REG_SMPS10_OUT2:
852 if (!PALMAS_PMIC_HAS(palmas, SMPS10_BOOST))
853 continue;
854 }
855
856 if ((id == PALMAS_REG_SMPS6) || (id == PALMAS_REG_SMPS8))
857 ramp_delay_support = true;
858
859 if (ramp_delay_support) {
860 addr = palmas_regs_info[id].tstep_addr;
861 ret = palmas_smps_read(pmic->palmas, addr, &reg);
862 if (ret < 0) {
863 dev_err(&pdev->dev,
864 "reading TSTEP reg failed: %d\n", ret);
865 goto err_unregister_regulator;
866 }
867 pmic->desc[id].ramp_delay =
868 palmas_smps_ramp_delay[reg & 0x3];
869 pmic->ramp_delay[id] = pmic->desc[id].ramp_delay;
870 }
871
872 /* Initialise sleep/init values from platform data */
873 if (pdata && pdata->reg_init[id]) {
874 reg_init = pdata->reg_init[id];
875 ret = palmas_smps_init(palmas, id, reg_init);
876 if (ret)
877 goto err_unregister_regulator;
878 }
879
880 /* Register the regulators */
881 pmic->desc[id].name = palmas_regs_info[id].name;
882 pmic->desc[id].id = id;
883
884 switch (id) {
885 case PALMAS_REG_SMPS10_OUT1:
886 case PALMAS_REG_SMPS10_OUT2:
887 pmic->desc[id].n_voltages = PALMAS_SMPS10_NUM_VOLTAGES;
888 pmic->desc[id].ops = &palmas_ops_smps10;
889 pmic->desc[id].vsel_reg =
890 PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE,
891 PALMAS_SMPS10_CTRL);
892 pmic->desc[id].vsel_mask = SMPS10_VSEL;
893 pmic->desc[id].enable_reg =
894 PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE,
895 PALMAS_SMPS10_CTRL);
896 if (id == PALMAS_REG_SMPS10_OUT1)
897 pmic->desc[id].enable_mask = SMPS10_SWITCH_EN;
898 else
899 pmic->desc[id].enable_mask = SMPS10_BOOST_EN;
900 pmic->desc[id].bypass_reg =
901 PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE,
902 PALMAS_SMPS10_CTRL);
903 pmic->desc[id].bypass_mask = SMPS10_BYPASS_EN;
904 pmic->desc[id].min_uV = 3750000;
905 pmic->desc[id].uV_step = 1250000;
906 break;
907 default:
908 /*
909 * Read and store the RANGE bit for later use
910 * This must be done before regulator is probed,
911 * otherwise we error in probe with unsupportable
912 * ranges. Read the current smps mode for later use.
913 */
914 addr = palmas_regs_info[id].vsel_addr;
915
916 ret = palmas_smps_read(pmic->palmas, addr, &reg);
917 if (ret)
918 goto err_unregister_regulator;
919 if (reg & PALMAS_SMPS12_VOLTAGE_RANGE)
920 pmic->range[id] = 1;
921
922 pmic->desc[id].ops = &palmas_ops_smps;
923 pmic->desc[id].n_voltages = PALMAS_SMPS_NUM_VOLTAGES;
924 pmic->desc[id].vsel_reg =
925 PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE,
926 palmas_regs_info[id].vsel_addr);
927 pmic->desc[id].vsel_mask =
928 PALMAS_SMPS12_VOLTAGE_VSEL_MASK;
929
930 /* Read the smps mode for later use. */
931 addr = palmas_regs_info[id].ctrl_addr;
932 ret = palmas_smps_read(pmic->palmas, addr, &reg);
933 if (ret)
934 goto err_unregister_regulator;
935 pmic->current_reg_mode[id] = reg &
936 PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
937 }
938
939 pmic->desc[id].type = REGULATOR_VOLTAGE;
940 pmic->desc[id].owner = THIS_MODULE;
941
942 if (pdata)
943 config.init_data = pdata->reg_data[id];
944 else
945 config.init_data = NULL;
946
947 pmic->desc[id].supply_name = palmas_regs_info[id].sname;
948 config.of_node = palmas_matches[id].of_node;
949
950 rdev = regulator_register(&pmic->desc[id], &config);
951 if (IS_ERR(rdev)) {
952 dev_err(&pdev->dev,
953 "failed to register %s regulator\n",
954 pdev->name);
955 ret = PTR_ERR(rdev);
956 goto err_unregister_regulator;
957 }
958
959 /* Save regulator for cleanup */
960 pmic->rdev[id] = rdev;
961 }
962
963 /* Start this loop from the id left from previous loop */
964 for (; id < PALMAS_NUM_REGS; id++) {
965
966 /* Miss out regulators which are not available due
967 * to alternate functions.
968 */
969
970 /* Register the regulators */
971 pmic->desc[id].name = palmas_regs_info[id].name;
972 pmic->desc[id].id = id;
973 pmic->desc[id].type = REGULATOR_VOLTAGE;
974 pmic->desc[id].owner = THIS_MODULE;
975
976 if (id < PALMAS_REG_REGEN1) {
977 pmic->desc[id].n_voltages = PALMAS_LDO_NUM_VOLTAGES;
978 pmic->desc[id].ops = &palmas_ops_ldo;
979 pmic->desc[id].min_uV = 900000;
980 pmic->desc[id].uV_step = 50000;
981 pmic->desc[id].linear_min_sel = 1;
982 pmic->desc[id].vsel_reg =
983 PALMAS_BASE_TO_REG(PALMAS_LDO_BASE,
984 palmas_regs_info[id].vsel_addr);
985 pmic->desc[id].vsel_mask =
986 PALMAS_LDO1_VOLTAGE_VSEL_MASK;
987 pmic->desc[id].enable_reg =
988 PALMAS_BASE_TO_REG(PALMAS_LDO_BASE,
989 palmas_regs_info[id].ctrl_addr);
990 pmic->desc[id].enable_mask =
991 PALMAS_LDO1_CTRL_MODE_ACTIVE;
992
993 /* Check if LDO8 is in tracking mode or not */
994 if (pdata && (id == PALMAS_REG_LDO8) &&
995 pdata->enable_ldo8_tracking) {
996 palmas_enable_ldo8_track(palmas);
997 pmic->desc[id].min_uV = 450000;
998 pmic->desc[id].uV_step = 25000;
999 }
1000 } else {
1001 pmic->desc[id].n_voltages = 1;
1002 pmic->desc[id].ops = &palmas_ops_extreg;
1003 pmic->desc[id].enable_reg =
1004 PALMAS_BASE_TO_REG(PALMAS_RESOURCE_BASE,
1005 palmas_regs_info[id].ctrl_addr);
1006 pmic->desc[id].enable_mask =
1007 PALMAS_REGEN1_CTRL_MODE_ACTIVE;
1008 }
1009
1010 if (pdata)
1011 config.init_data = pdata->reg_data[id];
1012 else
1013 config.init_data = NULL;
1014
1015 pmic->desc[id].supply_name = palmas_regs_info[id].sname;
1016 config.of_node = palmas_matches[id].of_node;
1017
1018 rdev = regulator_register(&pmic->desc[id], &config);
1019 if (IS_ERR(rdev)) {
1020 dev_err(&pdev->dev,
1021 "failed to register %s regulator\n",
1022 pdev->name);
1023 ret = PTR_ERR(rdev);
1024 goto err_unregister_regulator;
1025 }
1026
1027 /* Save regulator for cleanup */
1028 pmic->rdev[id] = rdev;
1029
1030 /* Initialise sleep/init values from platform data */
1031 if (pdata) {
1032 reg_init = pdata->reg_init[id];
1033 if (reg_init) {
1034 if (id < PALMAS_REG_REGEN1)
1035 ret = palmas_ldo_init(palmas,
1036 id, reg_init);
1037 else
1038 ret = palmas_extreg_init(palmas,
1039 id, reg_init);
1040 if (ret) {
1041 regulator_unregister(pmic->rdev[id]);
1042 goto err_unregister_regulator;
1043 }
1044 }
1045 }
1046 }
1047
1048
1049 return 0;
1050
1051 err_unregister_regulator:
1052 while (--id >= 0)
1053 regulator_unregister(pmic->rdev[id]);
1054 return ret;
1055 }
1056
1057 static int palmas_regulators_remove(struct platform_device *pdev)
1058 {
1059 struct palmas_pmic *pmic = platform_get_drvdata(pdev);
1060 int id;
1061
1062 for (id = 0; id < PALMAS_NUM_REGS; id++)
1063 regulator_unregister(pmic->rdev[id]);
1064 return 0;
1065 }
1066
1067 static struct of_device_id of_palmas_match_tbl[] = {
1068 { .compatible = "ti,palmas-pmic", },
1069 { .compatible = "ti,twl6035-pmic", },
1070 { .compatible = "ti,twl6036-pmic", },
1071 { .compatible = "ti,twl6037-pmic", },
1072 { .compatible = "ti,tps65913-pmic", },
1073 { .compatible = "ti,tps65914-pmic", },
1074 { .compatible = "ti,tps80036-pmic", },
1075 { .compatible = "ti,tps659038-pmic", },
1076 { /* end */ }
1077 };
1078
1079 static struct platform_driver palmas_driver = {
1080 .driver = {
1081 .name = "palmas-pmic",
1082 .of_match_table = of_palmas_match_tbl,
1083 .owner = THIS_MODULE,
1084 },
1085 .probe = palmas_regulators_probe,
1086 .remove = palmas_regulators_remove,
1087 };
1088
1089 static int __init palmas_init(void)
1090 {
1091 return platform_driver_register(&palmas_driver);
1092 }
1093 subsys_initcall(palmas_init);
1094
1095 static void __exit palmas_exit(void)
1096 {
1097 platform_driver_unregister(&palmas_driver);
1098 }
1099 module_exit(palmas_exit);
1100
1101 MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
1102 MODULE_DESCRIPTION("Palmas voltage regulator driver");
1103 MODULE_LICENSE("GPL");
1104 MODULE_ALIAS("platform:palmas-pmic");
1105 MODULE_DEVICE_TABLE(of, of_palmas_match_tbl);
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