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gpio: rcar: Fix runtime PM imbalance on error
[linux/fpc-iii.git] / drivers / regulator / max77620-regulator.c
blob8d9731e4052bf21f23b032d33499b751d439deba
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Maxim MAX77620 Regulator driver
4 *
5 * Copyright (c) 2016-2018, NVIDIA CORPORATION. All rights reserved.
6 *
7 * Author: Mallikarjun Kasoju <mkasoju@nvidia.com>
8 * Laxman Dewangan <ldewangan@nvidia.com>
9 */
10
11 #include <linux/init.h>
12 #include <linux/mfd/max77620.h>
13 #include <linux/module.h>
14 #include <linux/of.h>
15 #include <linux/platform_device.h>
16 #include <linux/regmap.h>
17 #include <linux/regulator/driver.h>
18 #include <linux/regulator/machine.h>
19 #include <linux/regulator/of_regulator.h>
20
21 #define max77620_rails(_name) "max77620-"#_name
22
23 /* Power Mode */
24 #define MAX77620_POWER_MODE_NORMAL 3
25 #define MAX77620_POWER_MODE_LPM 2
26 #define MAX77620_POWER_MODE_GLPM 1
27 #define MAX77620_POWER_MODE_DISABLE 0
28
29 /* SD Slew Rate */
30 #define MAX77620_SD_SR_13_75 0
31 #define MAX77620_SD_SR_27_5 1
32 #define MAX77620_SD_SR_55 2
33 #define MAX77620_SD_SR_100 3
34
35 enum max77620_regulators {
36 MAX77620_REGULATOR_ID_SD0,
37 MAX77620_REGULATOR_ID_SD1,
38 MAX77620_REGULATOR_ID_SD2,
39 MAX77620_REGULATOR_ID_SD3,
40 MAX77620_REGULATOR_ID_SD4,
41 MAX77620_REGULATOR_ID_LDO0,
42 MAX77620_REGULATOR_ID_LDO1,
43 MAX77620_REGULATOR_ID_LDO2,
44 MAX77620_REGULATOR_ID_LDO3,
45 MAX77620_REGULATOR_ID_LDO4,
46 MAX77620_REGULATOR_ID_LDO5,
47 MAX77620_REGULATOR_ID_LDO6,
48 MAX77620_REGULATOR_ID_LDO7,
49 MAX77620_REGULATOR_ID_LDO8,
50 MAX77620_NUM_REGS,
51 };
52
53 /* Regulator types */
54 enum max77620_regulator_type {
55 MAX77620_REGULATOR_TYPE_SD,
56 MAX77620_REGULATOR_TYPE_LDO_N,
57 MAX77620_REGULATOR_TYPE_LDO_P,
58 };
59
60 struct max77620_regulator_info {
61 u8 type;
62 u8 fps_addr;
63 u8 volt_addr;
64 u8 cfg_addr;
65 u8 power_mode_mask;
66 u8 power_mode_shift;
67 u8 remote_sense_addr;
68 u8 remote_sense_mask;
69 struct regulator_desc desc;
70 };
71
72 struct max77620_regulator_pdata {
73 int active_fps_src;
74 int active_fps_pd_slot;
75 int active_fps_pu_slot;
76 int suspend_fps_src;
77 int suspend_fps_pd_slot;
78 int suspend_fps_pu_slot;
79 int current_mode;
80 int power_ok;
81 int ramp_rate_setting;
82 };
83
84 struct max77620_regulator {
85 struct device *dev;
86 struct regmap *rmap;
87 struct max77620_regulator_info *rinfo[MAX77620_NUM_REGS];
88 struct max77620_regulator_pdata reg_pdata[MAX77620_NUM_REGS];
89 int enable_power_mode[MAX77620_NUM_REGS];
90 int current_power_mode[MAX77620_NUM_REGS];
91 int active_fps_src[MAX77620_NUM_REGS];
92 };
93
94 #define fps_src_name(fps_src) \
95 (fps_src == MAX77620_FPS_SRC_0 ? "FPS_SRC_0" : \
96 fps_src == MAX77620_FPS_SRC_1 ? "FPS_SRC_1" : \
97 fps_src == MAX77620_FPS_SRC_2 ? "FPS_SRC_2" : "FPS_SRC_NONE")
98
99 static int max77620_regulator_get_fps_src(struct max77620_regulator *pmic,
100 int id)
101 {
102 struct max77620_regulator_info *rinfo = pmic->rinfo[id];
103 unsigned int val;
104 int ret;
105
106 ret = regmap_read(pmic->rmap, rinfo->fps_addr, &val);
107 if (ret < 0) {
108 dev_err(pmic->dev, "Reg 0x%02x read failed %d\n",
109 rinfo->fps_addr, ret);
110 return ret;
111 }
112
113 return (val & MAX77620_FPS_SRC_MASK) >> MAX77620_FPS_SRC_SHIFT;
114 }
115
116 static int max77620_regulator_set_fps_src(struct max77620_regulator *pmic,
117 int fps_src, int id)
118 {
119 struct max77620_regulator_info *rinfo = pmic->rinfo[id];
120 unsigned int val;
121 int ret;
122
123 if (!rinfo)
124 return 0;
125
126 switch (fps_src) {
127 case MAX77620_FPS_SRC_0:
128 case MAX77620_FPS_SRC_1:
129 case MAX77620_FPS_SRC_2:
130 case MAX77620_FPS_SRC_NONE:
131 break;
132
133 case MAX77620_FPS_SRC_DEF:
134 ret = regmap_read(pmic->rmap, rinfo->fps_addr, &val);
135 if (ret < 0) {
136 dev_err(pmic->dev, "Reg 0x%02x read failed %d\n",
137 rinfo->fps_addr, ret);
138 return ret;
139 }
140 ret = (val & MAX77620_FPS_SRC_MASK) >> MAX77620_FPS_SRC_SHIFT;
141 pmic->active_fps_src[id] = ret;
142 return 0;
143
144 default:
145 dev_err(pmic->dev, "Invalid FPS %d for regulator %d\n",
146 fps_src, id);
147 return -EINVAL;
148 }
149
150 ret = regmap_update_bits(pmic->rmap, rinfo->fps_addr,
151 MAX77620_FPS_SRC_MASK,
152 fps_src << MAX77620_FPS_SRC_SHIFT);
153 if (ret < 0) {
154 dev_err(pmic->dev, "Reg 0x%02x update failed %d\n",
155 rinfo->fps_addr, ret);
156 return ret;
157 }
158 pmic->active_fps_src[id] = fps_src;
159
160 return 0;
161 }
162
163 static int max77620_regulator_set_fps_slots(struct max77620_regulator *pmic,
164 int id, bool is_suspend)
165 {
166 struct max77620_regulator_pdata *rpdata = &pmic->reg_pdata[id];
167 struct max77620_regulator_info *rinfo = pmic->rinfo[id];
168 unsigned int val = 0;
169 unsigned int mask = 0;
170 int pu = rpdata->active_fps_pu_slot;
171 int pd = rpdata->active_fps_pd_slot;
172 int ret = 0;
173
174 if (!rinfo)
175 return 0;
176
177 if (is_suspend) {
178 pu = rpdata->suspend_fps_pu_slot;
179 pd = rpdata->suspend_fps_pd_slot;
180 }
181
182 /* FPS power up period setting */
183 if (pu >= 0) {
184 val |= (pu << MAX77620_FPS_PU_PERIOD_SHIFT);
185 mask |= MAX77620_FPS_PU_PERIOD_MASK;
186 }
187
188 /* FPS power down period setting */
189 if (pd >= 0) {
190 val |= (pd << MAX77620_FPS_PD_PERIOD_SHIFT);
191 mask |= MAX77620_FPS_PD_PERIOD_MASK;
192 }
193
194 if (mask) {
195 ret = regmap_update_bits(pmic->rmap, rinfo->fps_addr,
196 mask, val);
197 if (ret < 0) {
198 dev_err(pmic->dev, "Reg 0x%02x update failed: %d\n",
199 rinfo->fps_addr, ret);
200 return ret;
201 }
202 }
203
204 return ret;
205 }
206
207 static int max77620_regulator_set_power_mode(struct max77620_regulator *pmic,
208 int power_mode, int id)
209 {
210 struct max77620_regulator_info *rinfo = pmic->rinfo[id];
211 u8 mask = rinfo->power_mode_mask;
212 u8 shift = rinfo->power_mode_shift;
213 u8 addr;
214 int ret;
215
216 switch (rinfo->type) {
217 case MAX77620_REGULATOR_TYPE_SD:
218 addr = rinfo->cfg_addr;
219 break;
220 default:
221 addr = rinfo->volt_addr;
222 break;
223 }
224
225 ret = regmap_update_bits(pmic->rmap, addr, mask, power_mode << shift);
226 if (ret < 0) {
227 dev_err(pmic->dev, "Regulator %d mode set failed: %d\n",
228 id, ret);
229 return ret;
230 }
231 pmic->current_power_mode[id] = power_mode;
232
233 return ret;
234 }
235
236 static int max77620_regulator_get_power_mode(struct max77620_regulator *pmic,
237 int id)
238 {
239 struct max77620_regulator_info *rinfo = pmic->rinfo[id];
240 unsigned int val, addr;
241 u8 mask = rinfo->power_mode_mask;
242 u8 shift = rinfo->power_mode_shift;
243 int ret;
244
245 switch (rinfo->type) {
246 case MAX77620_REGULATOR_TYPE_SD:
247 addr = rinfo->cfg_addr;
248 break;
249 default:
250 addr = rinfo->volt_addr;
251 break;
252 }
253
254 ret = regmap_read(pmic->rmap, addr, &val);
255 if (ret < 0) {
256 dev_err(pmic->dev, "Regulator %d: Reg 0x%02x read failed: %d\n",
257 id, addr, ret);
258 return ret;
259 }
260
261 return (val & mask) >> shift;
262 }
263
264 static int max77620_read_slew_rate(struct max77620_regulator *pmic, int id)
265 {
266 struct max77620_regulator_info *rinfo = pmic->rinfo[id];
267 unsigned int rval;
268 int slew_rate;
269 int ret;
270
271 ret = regmap_read(pmic->rmap, rinfo->cfg_addr, &rval);
272 if (ret < 0) {
273 dev_err(pmic->dev, "Register 0x%02x read failed: %d\n",
274 rinfo->cfg_addr, ret);
275 return ret;
276 }
277
278 switch (rinfo->type) {
279 case MAX77620_REGULATOR_TYPE_SD:
280 slew_rate = (rval >> MAX77620_SD_SR_SHIFT) & 0x3;
281 switch (slew_rate) {
282 case 0:
283 slew_rate = 13750;
284 break;
285 case 1:
286 slew_rate = 27500;
287 break;
288 case 2:
289 slew_rate = 55000;
290 break;
291 case 3:
292 slew_rate = 100000;
293 break;
294 }
295 rinfo->desc.ramp_delay = slew_rate;
296 break;
297 default:
298 slew_rate = rval & 0x1;
299 switch (slew_rate) {
300 case 0:
301 slew_rate = 100000;
302 break;
303 case 1:
304 slew_rate = 5000;
305 break;
306 }
307 rinfo->desc.ramp_delay = slew_rate;
308 break;
309 }
310
311 return 0;
312 }
313
314 static int max77620_set_slew_rate(struct max77620_regulator *pmic, int id,
315 int slew_rate)
316 {
317 struct max77620_regulator_info *rinfo = pmic->rinfo[id];
318 unsigned int val;
319 int ret;
320 u8 mask;
321
322 if (rinfo->type == MAX77620_REGULATOR_TYPE_SD) {
323 if (slew_rate <= 13750)
324 val = 0;
325 else if (slew_rate <= 27500)
326 val = 1;
327 else if (slew_rate <= 55000)
328 val = 2;
329 else
330 val = 3;
331 val <<= MAX77620_SD_SR_SHIFT;
332 mask = MAX77620_SD_SR_MASK;
333 } else {
334 if (slew_rate <= 5000)
335 val = 1;
336 else
337 val = 0;
338 mask = MAX77620_LDO_SLEW_RATE_MASK;
339 }
340
341 ret = regmap_update_bits(pmic->rmap, rinfo->cfg_addr, mask, val);
342 if (ret < 0) {
343 dev_err(pmic->dev, "Regulator %d slew rate set failed: %d\n",
344 id, ret);
345 return ret;
346 }
347
348 return 0;
349 }
350
351 static int max77620_config_power_ok(struct max77620_regulator *pmic, int id)
352 {
353 struct max77620_regulator_pdata *rpdata = &pmic->reg_pdata[id];
354 struct max77620_regulator_info *rinfo = pmic->rinfo[id];
355 struct max77620_chip *chip = dev_get_drvdata(pmic->dev->parent);
356 u8 val, mask;
357 int ret;
358
359 switch (chip->chip_id) {
360 case MAX20024:
361 if (rpdata->power_ok >= 0) {
362 if (rinfo->type == MAX77620_REGULATOR_TYPE_SD)
363 mask = MAX20024_SD_CFG1_MPOK_MASK;
364 else
365 mask = MAX20024_LDO_CFG2_MPOK_MASK;
366
367 val = rpdata->power_ok ? mask : 0;
368
369 ret = regmap_update_bits(pmic->rmap, rinfo->cfg_addr,
370 mask, val);
371 if (ret < 0) {
372 dev_err(pmic->dev, "Reg 0x%02x update failed %d\n",
373 rinfo->cfg_addr, ret);
374 return ret;
375 }
376 }
377 break;
378
379 default:
380 break;
381 }
382
383 return 0;
384 }
385
386 static int max77620_init_pmic(struct max77620_regulator *pmic, int id)
387 {
388 struct max77620_regulator_pdata *rpdata = &pmic->reg_pdata[id];
389 int ret;
390
391 max77620_config_power_ok(pmic, id);
392
393 /* Update power mode */
394 ret = max77620_regulator_get_power_mode(pmic, id);
395 if (ret < 0)
396 return ret;
397
398 pmic->current_power_mode[id] = ret;
399 pmic->enable_power_mode[id] = MAX77620_POWER_MODE_NORMAL;
400
401 if (rpdata->active_fps_src == MAX77620_FPS_SRC_DEF) {
402 ret = max77620_regulator_get_fps_src(pmic, id);
403 if (ret < 0)
404 return ret;
405 rpdata->active_fps_src = ret;
406 }
407
408 /* If rails are externally control of FPS then enable it always. */
409 if (rpdata->active_fps_src == MAX77620_FPS_SRC_NONE) {
410 ret = max77620_regulator_set_power_mode(pmic,
411 pmic->enable_power_mode[id], id);
412 if (ret < 0)
413 return ret;
414 } else {
415 if (pmic->current_power_mode[id] !=
416 pmic->enable_power_mode[id]) {
417 ret = max77620_regulator_set_power_mode(pmic,
418 pmic->enable_power_mode[id], id);
419 if (ret < 0)
420 return ret;
421 }
422 }
423
424 ret = max77620_regulator_set_fps_src(pmic, rpdata->active_fps_src, id);
425 if (ret < 0)
426 return ret;
427
428 ret = max77620_regulator_set_fps_slots(pmic, id, false);
429 if (ret < 0)
430 return ret;
431
432 if (rpdata->ramp_rate_setting) {
433 ret = max77620_set_slew_rate(pmic, id,
434 rpdata->ramp_rate_setting);
435 if (ret < 0)
436 return ret;
437 }
438
439 return 0;
440 }
441
442 static int max77620_regulator_enable(struct regulator_dev *rdev)
443 {
444 struct max77620_regulator *pmic = rdev_get_drvdata(rdev);
445 int id = rdev_get_id(rdev);
446
447 if (pmic->active_fps_src[id] != MAX77620_FPS_SRC_NONE)
448 return 0;
449
450 return max77620_regulator_set_power_mode(pmic,
451 pmic->enable_power_mode[id], id);
452 }
453
454 static int max77620_regulator_disable(struct regulator_dev *rdev)
455 {
456 struct max77620_regulator *pmic = rdev_get_drvdata(rdev);
457 int id = rdev_get_id(rdev);
458
459 if (pmic->active_fps_src[id] != MAX77620_FPS_SRC_NONE)
460 return 0;
461
462 return max77620_regulator_set_power_mode(pmic,
463 MAX77620_POWER_MODE_DISABLE, id);
464 }
465
466 static int max77620_regulator_is_enabled(struct regulator_dev *rdev)
467 {
468 struct max77620_regulator *pmic = rdev_get_drvdata(rdev);
469 int id = rdev_get_id(rdev);
470 int ret;
471
472 if (pmic->active_fps_src[id] != MAX77620_FPS_SRC_NONE)
473 return 1;
474
475 ret = max77620_regulator_get_power_mode(pmic, id);
476 if (ret < 0)
477 return ret;
478
479 if (ret != MAX77620_POWER_MODE_DISABLE)
480 return 1;
481
482 return 0;
483 }
484
485 static int max77620_regulator_set_mode(struct regulator_dev *rdev,
486 unsigned int mode)
487 {
488 struct max77620_regulator *pmic = rdev_get_drvdata(rdev);
489 int id = rdev_get_id(rdev);
490 struct max77620_regulator_info *rinfo = pmic->rinfo[id];
491 struct max77620_regulator_pdata *rpdata = &pmic->reg_pdata[id];
492 bool fpwm = false;
493 int power_mode;
494 int ret;
495 u8 val;
496
497 switch (mode) {
498 case REGULATOR_MODE_FAST:
499 fpwm = true;
500 power_mode = MAX77620_POWER_MODE_NORMAL;
501 break;
502
503 case REGULATOR_MODE_NORMAL:
504 power_mode = MAX77620_POWER_MODE_NORMAL;
505 break;
506
507 case REGULATOR_MODE_IDLE:
508 power_mode = MAX77620_POWER_MODE_LPM;
509 break;
510
511 default:
512 dev_err(pmic->dev, "Regulator %d mode %d is invalid\n",
513 id, mode);
514 return -EINVAL;
515 }
516
517 if (rinfo->type != MAX77620_REGULATOR_TYPE_SD)
518 goto skip_fpwm;
519
520 val = (fpwm) ? MAX77620_SD_FPWM_MASK : 0;
521 ret = regmap_update_bits(pmic->rmap, rinfo->cfg_addr,
522 MAX77620_SD_FPWM_MASK, val);
523 if (ret < 0) {
524 dev_err(pmic->dev, "Reg 0x%02x update failed: %d\n",
525 rinfo->cfg_addr, ret);
526 return ret;
527 }
528 rpdata->current_mode = mode;
529
530 skip_fpwm:
531 ret = max77620_regulator_set_power_mode(pmic, power_mode, id);
532 if (ret < 0)
533 return ret;
534
535 pmic->enable_power_mode[id] = power_mode;
536
537 return 0;
538 }
539
540 static unsigned int max77620_regulator_get_mode(struct regulator_dev *rdev)
541 {
542 struct max77620_regulator *pmic = rdev_get_drvdata(rdev);
543 int id = rdev_get_id(rdev);
544 struct max77620_regulator_info *rinfo = pmic->rinfo[id];
545 int fpwm = 0;
546 int ret;
547 int pm_mode, reg_mode;
548 unsigned int val;
549
550 ret = max77620_regulator_get_power_mode(pmic, id);
551 if (ret < 0)
552 return 0;
553
554 pm_mode = ret;
555
556 if (rinfo->type == MAX77620_REGULATOR_TYPE_SD) {
557 ret = regmap_read(pmic->rmap, rinfo->cfg_addr, &val);
558 if (ret < 0) {
559 dev_err(pmic->dev, "Reg 0x%02x read failed: %d\n",
560 rinfo->cfg_addr, ret);
561 return ret;
562 }
563 fpwm = !!(val & MAX77620_SD_FPWM_MASK);
564 }
565
566 switch (pm_mode) {
567 case MAX77620_POWER_MODE_NORMAL:
568 case MAX77620_POWER_MODE_DISABLE:
569 if (fpwm)
570 reg_mode = REGULATOR_MODE_FAST;
571 else
572 reg_mode = REGULATOR_MODE_NORMAL;
573 break;
574 case MAX77620_POWER_MODE_LPM:
575 case MAX77620_POWER_MODE_GLPM:
576 reg_mode = REGULATOR_MODE_IDLE;
577 break;
578 default:
579 return 0;
580 }
581
582 return reg_mode;
583 }
584
585 static int max77620_regulator_set_ramp_delay(struct regulator_dev *rdev,
586 int ramp_delay)
587 {
588 struct max77620_regulator *pmic = rdev_get_drvdata(rdev);
589 int id = rdev_get_id(rdev);
590 struct max77620_regulator_pdata *rpdata = &pmic->reg_pdata[id];
591
592 /* Device specific ramp rate setting tells that platform has
593 * different ramp rate from advertised value. In this case,
594 * do not configure anything and just return success.
595 */
596 if (rpdata->ramp_rate_setting)
597 return 0;
598
599 return max77620_set_slew_rate(pmic, id, ramp_delay);
600 }
601
602 static int max77620_of_parse_cb(struct device_node *np,
603 const struct regulator_desc *desc,
604 struct regulator_config *config)
605 {
606 struct max77620_regulator *pmic = config->driver_data;
607 struct max77620_regulator_pdata *rpdata = &pmic->reg_pdata[desc->id];
608 u32 pval;
609 int ret;
610
611 ret = of_property_read_u32(np, "maxim,active-fps-source", &pval);
612 rpdata->active_fps_src = (!ret) ? pval : MAX77620_FPS_SRC_DEF;
613
614 ret = of_property_read_u32(np, "maxim,active-fps-power-up-slot", &pval);
615 rpdata->active_fps_pu_slot = (!ret) ? pval : -1;
616
617 ret = of_property_read_u32(
618 np, "maxim,active-fps-power-down-slot", &pval);
619 rpdata->active_fps_pd_slot = (!ret) ? pval : -1;
620
621 ret = of_property_read_u32(np, "maxim,suspend-fps-source", &pval);
622 rpdata->suspend_fps_src = (!ret) ? pval : -1;
623
624 ret = of_property_read_u32(
625 np, "maxim,suspend-fps-power-up-slot", &pval);
626 rpdata->suspend_fps_pu_slot = (!ret) ? pval : -1;
627
628 ret = of_property_read_u32(
629 np, "maxim,suspend-fps-power-down-slot", &pval);
630 rpdata->suspend_fps_pd_slot = (!ret) ? pval : -1;
631
632 ret = of_property_read_u32(np, "maxim,power-ok-control", &pval);
633 if (!ret)
634 rpdata->power_ok = pval;
635 else
636 rpdata->power_ok = -1;
637
638 ret = of_property_read_u32(np, "maxim,ramp-rate-setting", &pval);
639 rpdata->ramp_rate_setting = (!ret) ? pval : 0;
640
641 return max77620_init_pmic(pmic, desc->id);
642 }
643
644 static const struct regulator_ops max77620_regulator_ops = {
645 .is_enabled = max77620_regulator_is_enabled,
646 .enable = max77620_regulator_enable,
647 .disable = max77620_regulator_disable,
648 .list_voltage = regulator_list_voltage_linear,
649 .map_voltage = regulator_map_voltage_linear,
650 .get_voltage_sel = regulator_get_voltage_sel_regmap,
651 .set_voltage_sel = regulator_set_voltage_sel_regmap,
652 .set_mode = max77620_regulator_set_mode,
653 .get_mode = max77620_regulator_get_mode,
654 .set_ramp_delay = max77620_regulator_set_ramp_delay,
655 .set_voltage_time_sel = regulator_set_voltage_time_sel,
656 .set_active_discharge = regulator_set_active_discharge_regmap,
657 };
658
659 #define MAX77620_SD_CNF2_ROVS_EN_NONE 0
660 #define RAIL_SD(_id, _name, _sname, _volt_mask, _min_uV, _max_uV, \
661 _step_uV, _rs_add, _rs_mask) \
662 [MAX77620_REGULATOR_ID_##_id] = { \
663 .type = MAX77620_REGULATOR_TYPE_SD, \
664 .volt_addr = MAX77620_REG_##_id, \
665 .cfg_addr = MAX77620_REG_##_id##_CFG, \
666 .fps_addr = MAX77620_REG_FPS_##_id, \
667 .remote_sense_addr = _rs_add, \
668 .remote_sense_mask = MAX77620_SD_CNF2_ROVS_EN_##_rs_mask, \
669 .power_mode_mask = MAX77620_SD_POWER_MODE_MASK, \
670 .power_mode_shift = MAX77620_SD_POWER_MODE_SHIFT, \
671 .desc = { \
672 .name = max77620_rails(_name), \
673 .of_match = of_match_ptr(#_name), \
674 .regulators_node = of_match_ptr("regulators"), \
675 .of_parse_cb = max77620_of_parse_cb, \
676 .supply_name = _sname, \
677 .id = MAX77620_REGULATOR_ID_##_id, \
678 .ops = &max77620_regulator_ops, \
679 .n_voltages = ((_max_uV - _min_uV) / _step_uV) + 1, \
680 .min_uV = _min_uV, \
681 .uV_step = _step_uV, \
682 .enable_time = 500, \
683 .vsel_mask = MAX77620_##_volt_mask##_VOLT_MASK, \
684 .vsel_reg = MAX77620_REG_##_id, \
685 .active_discharge_off = 0, \
686 .active_discharge_on = MAX77620_SD_CFG1_ADE_ENABLE, \
687 .active_discharge_mask = MAX77620_SD_CFG1_ADE_MASK, \
688 .active_discharge_reg = MAX77620_REG_##_id##_CFG, \
689 .type = REGULATOR_VOLTAGE, \
690 .owner = THIS_MODULE, \
691 }, \
692 }
693
694 #define RAIL_LDO(_id, _name, _sname, _type, _min_uV, _max_uV, _step_uV) \
695 [MAX77620_REGULATOR_ID_##_id] = { \
696 .type = MAX77620_REGULATOR_TYPE_LDO_##_type, \
697 .volt_addr = MAX77620_REG_##_id##_CFG, \
698 .cfg_addr = MAX77620_REG_##_id##_CFG2, \
699 .fps_addr = MAX77620_REG_FPS_##_id, \
700 .remote_sense_addr = 0xFF, \
701 .power_mode_mask = MAX77620_LDO_POWER_MODE_MASK, \
702 .power_mode_shift = MAX77620_LDO_POWER_MODE_SHIFT, \
703 .desc = { \
704 .name = max77620_rails(_name), \
705 .of_match = of_match_ptr(#_name), \
706 .regulators_node = of_match_ptr("regulators"), \
707 .of_parse_cb = max77620_of_parse_cb, \
708 .supply_name = _sname, \
709 .id = MAX77620_REGULATOR_ID_##_id, \
710 .ops = &max77620_regulator_ops, \
711 .n_voltages = ((_max_uV - _min_uV) / _step_uV) + 1, \
712 .min_uV = _min_uV, \
713 .uV_step = _step_uV, \
714 .enable_time = 500, \
715 .vsel_mask = MAX77620_LDO_VOLT_MASK, \
716 .vsel_reg = MAX77620_REG_##_id##_CFG, \
717 .active_discharge_off = 0, \
718 .active_discharge_on = MAX77620_LDO_CFG2_ADE_ENABLE, \
719 .active_discharge_mask = MAX77620_LDO_CFG2_ADE_MASK, \
720 .active_discharge_reg = MAX77620_REG_##_id##_CFG2, \
721 .type = REGULATOR_VOLTAGE, \
722 .owner = THIS_MODULE, \
723 }, \
724 }
725
726 static struct max77620_regulator_info max77620_regs_info[MAX77620_NUM_REGS] = {
727 RAIL_SD(SD0, sd0, "in-sd0", SD0, 600000, 1400000, 12500, 0x22, SD0),
728 RAIL_SD(SD1, sd1, "in-sd1", SD1, 600000, 1550000, 12500, 0x22, SD1),
729 RAIL_SD(SD2, sd2, "in-sd2", SDX, 600000, 3787500, 12500, 0xFF, NONE),
730 RAIL_SD(SD3, sd3, "in-sd3", SDX, 600000, 3787500, 12500, 0xFF, NONE),
731
732 RAIL_LDO(LDO0, ldo0, "in-ldo0-1", N, 800000, 2375000, 25000),
733 RAIL_LDO(LDO1, ldo1, "in-ldo0-1", N, 800000, 2375000, 25000),
734 RAIL_LDO(LDO2, ldo2, "in-ldo2", P, 800000, 3950000, 50000),
735 RAIL_LDO(LDO3, ldo3, "in-ldo3-5", P, 800000, 3950000, 50000),
736 RAIL_LDO(LDO4, ldo4, "in-ldo4-6", P, 800000, 1587500, 12500),
737 RAIL_LDO(LDO5, ldo5, "in-ldo3-5", P, 800000, 3950000, 50000),
738 RAIL_LDO(LDO6, ldo6, "in-ldo4-6", P, 800000, 3950000, 50000),
739 RAIL_LDO(LDO7, ldo7, "in-ldo7-8", N, 800000, 3950000, 50000),
740 RAIL_LDO(LDO8, ldo8, "in-ldo7-8", N, 800000, 3950000, 50000),
741 };
742
743 static struct max77620_regulator_info max20024_regs_info[MAX77620_NUM_REGS] = {
744 RAIL_SD(SD0, sd0, "in-sd0", SD0, 800000, 1587500, 12500, 0x22, SD0),
745 RAIL_SD(SD1, sd1, "in-sd1", SD1, 600000, 3387500, 12500, 0x22, SD1),
746 RAIL_SD(SD2, sd2, "in-sd2", SDX, 600000, 3787500, 12500, 0xFF, NONE),
747 RAIL_SD(SD3, sd3, "in-sd3", SDX, 600000, 3787500, 12500, 0xFF, NONE),
748 RAIL_SD(SD4, sd4, "in-sd4", SDX, 600000, 3787500, 12500, 0xFF, NONE),
749
750 RAIL_LDO(LDO0, ldo0, "in-ldo0-1", N, 800000, 2375000, 25000),
751 RAIL_LDO(LDO1, ldo1, "in-ldo0-1", N, 800000, 2375000, 25000),
752 RAIL_LDO(LDO2, ldo2, "in-ldo2", P, 800000, 3950000, 50000),
753 RAIL_LDO(LDO3, ldo3, "in-ldo3-5", P, 800000, 3950000, 50000),
754 RAIL_LDO(LDO4, ldo4, "in-ldo4-6", P, 800000, 1587500, 12500),
755 RAIL_LDO(LDO5, ldo5, "in-ldo3-5", P, 800000, 3950000, 50000),
756 RAIL_LDO(LDO6, ldo6, "in-ldo4-6", P, 800000, 3950000, 50000),
757 RAIL_LDO(LDO7, ldo7, "in-ldo7-8", N, 800000, 3950000, 50000),
758 RAIL_LDO(LDO8, ldo8, "in-ldo7-8", N, 800000, 3950000, 50000),
759 };
760
761 static struct max77620_regulator_info max77663_regs_info[MAX77620_NUM_REGS] = {
762 RAIL_SD(SD0, sd0, "in-sd0", SD0, 600000, 3387500, 12500, 0xFF, NONE),
763 RAIL_SD(SD1, sd1, "in-sd1", SD1, 800000, 1587500, 12500, 0xFF, NONE),
764 RAIL_SD(SD2, sd2, "in-sd2", SDX, 600000, 3787500, 12500, 0xFF, NONE),
765 RAIL_SD(SD3, sd3, "in-sd3", SDX, 600000, 3787500, 12500, 0xFF, NONE),
766 RAIL_SD(SD4, sd4, "in-sd4", SDX, 600000, 3787500, 12500, 0xFF, NONE),
767
768 RAIL_LDO(LDO0, ldo0, "in-ldo0-1", N, 800000, 2375000, 25000),
769 RAIL_LDO(LDO1, ldo1, "in-ldo0-1", N, 800000, 2375000, 25000),
770 RAIL_LDO(LDO2, ldo2, "in-ldo2", P, 800000, 3950000, 50000),
771 RAIL_LDO(LDO3, ldo3, "in-ldo3-5", P, 800000, 3950000, 50000),
772 RAIL_LDO(LDO4, ldo4, "in-ldo4-6", P, 800000, 1587500, 12500),
773 RAIL_LDO(LDO5, ldo5, "in-ldo3-5", P, 800000, 3950000, 50000),
774 RAIL_LDO(LDO6, ldo6, "in-ldo4-6", P, 800000, 3950000, 50000),
775 RAIL_LDO(LDO7, ldo7, "in-ldo7-8", N, 800000, 3950000, 50000),
776 RAIL_LDO(LDO8, ldo8, "in-ldo7-8", N, 800000, 3950000, 50000),
777 };
778
779 static int max77620_regulator_probe(struct platform_device *pdev)
780 {
781 struct max77620_chip *max77620_chip = dev_get_drvdata(pdev->dev.parent);
782 struct max77620_regulator_info *rinfo;
783 struct device *dev = &pdev->dev;
784 struct regulator_config config = { };
785 struct max77620_regulator *pmic;
786 int ret = 0;
787 int id;
788
789 pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL);
790 if (!pmic)
791 return -ENOMEM;
792
793 platform_set_drvdata(pdev, pmic);
794 pmic->dev = dev;
795 pmic->rmap = max77620_chip->rmap;
796 if (!dev->of_node)
797 dev->of_node = pdev->dev.parent->of_node;
798
799 switch (max77620_chip->chip_id) {
800 case MAX77620:
801 rinfo = max77620_regs_info;
802 break;
803 case MAX20024:
804 rinfo = max20024_regs_info;
805 break;
806 case MAX77663:
807 rinfo = max77663_regs_info;
808 break;
809 default:
810 return -EINVAL;
811 }
812
813 config.regmap = pmic->rmap;
814 config.dev = dev;
815 config.driver_data = pmic;
816
817 for (id = 0; id < MAX77620_NUM_REGS; id++) {
818 struct regulator_dev *rdev;
819 struct regulator_desc *rdesc;
820
821 if ((max77620_chip->chip_id == MAX77620) &&
822 (id == MAX77620_REGULATOR_ID_SD4))
823 continue;
824
825 rdesc = &rinfo[id].desc;
826 pmic->rinfo[id] = &rinfo[id];
827 pmic->enable_power_mode[id] = MAX77620_POWER_MODE_NORMAL;
828 pmic->reg_pdata[id].active_fps_src = -1;
829 pmic->reg_pdata[id].active_fps_pd_slot = -1;
830 pmic->reg_pdata[id].active_fps_pu_slot = -1;
831 pmic->reg_pdata[id].suspend_fps_src = -1;
832 pmic->reg_pdata[id].suspend_fps_pd_slot = -1;
833 pmic->reg_pdata[id].suspend_fps_pu_slot = -1;
834 pmic->reg_pdata[id].power_ok = -1;
835 pmic->reg_pdata[id].ramp_rate_setting = -1;
836
837 ret = max77620_read_slew_rate(pmic, id);
838 if (ret < 0)
839 return ret;
840
841 rdev = devm_regulator_register(dev, rdesc, &config);
842 if (IS_ERR(rdev)) {
843 ret = PTR_ERR(rdev);
844 dev_err(dev, "Regulator registration %s failed: %d\n",
845 rdesc->name, ret);
846 return ret;
847 }
848 }
849
850 return 0;
851 }
852
853 #ifdef CONFIG_PM_SLEEP
854 static int max77620_regulator_suspend(struct device *dev)
855 {
856 struct max77620_regulator *pmic = dev_get_drvdata(dev);
857 struct max77620_regulator_pdata *reg_pdata;
858 int id;
859
860 for (id = 0; id < MAX77620_NUM_REGS; id++) {
861 reg_pdata = &pmic->reg_pdata[id];
862
863 max77620_regulator_set_fps_slots(pmic, id, true);
864 if (reg_pdata->suspend_fps_src < 0)
865 continue;
866
867 max77620_regulator_set_fps_src(pmic, reg_pdata->suspend_fps_src,
868 id);
869 }
870
871 return 0;
872 }
873
874 static int max77620_regulator_resume(struct device *dev)
875 {
876 struct max77620_regulator *pmic = dev_get_drvdata(dev);
877 struct max77620_regulator_pdata *reg_pdata;
878 int id;
879
880 for (id = 0; id < MAX77620_NUM_REGS; id++) {
881 reg_pdata = &pmic->reg_pdata[id];
882
883 max77620_config_power_ok(pmic, id);
884
885 max77620_regulator_set_fps_slots(pmic, id, false);
886 if (reg_pdata->active_fps_src < 0)
887 continue;
888 max77620_regulator_set_fps_src(pmic, reg_pdata->active_fps_src,
889 id);
890 }
891
892 return 0;
893 }
894 #endif
895
896 static const struct dev_pm_ops max77620_regulator_pm_ops = {
897 SET_SYSTEM_SLEEP_PM_OPS(max77620_regulator_suspend,
898 max77620_regulator_resume)
899 };
900
901 static const struct platform_device_id max77620_regulator_devtype[] = {
902 { .name = "max77620-pmic", },
903 { .name = "max20024-pmic", },
904 { .name = "max77663-pmic", },
905 {},
906 };
907 MODULE_DEVICE_TABLE(platform, max77620_regulator_devtype);
908
909 static struct platform_driver max77620_regulator_driver = {
910 .probe = max77620_regulator_probe,
911 .id_table = max77620_regulator_devtype,
912 .driver = {
913 .name = "max77620-pmic",
914 .pm = &max77620_regulator_pm_ops,
915 },
916 };
917
918 module_platform_driver(max77620_regulator_driver);
919
920 MODULE_DESCRIPTION("MAX77620/MAX20024 regulator driver");
921 MODULE_AUTHOR("Mallikarjun Kasoju <mkasoju@nvidia.com>");
922 MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
923 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support