1 // SPDX-License-Identifier: GPL-2.0-or-later
2 //
3 // helpers.c -- Voltage/Current Regulator framework helper functions.
4 //
5 // Copyright 2007, 2008 Wolfson Microelectronics PLC.
6 // Copyright 2008 SlimLogic Ltd.
7
8 #include <linux/kernel.h>
9 #include <linux/err.h>
10 #include <linux/delay.h>
11 #include <linux/regmap.h>
12 #include <linux/regulator/consumer.h>
13 #include <linux/regulator/driver.h>
14 #include <linux/module.h>
15
16 /**
17 * regulator_is_enabled_regmap - standard is_enabled() for regmap users
18 *
19 * @rdev: regulator to operate on
20 *
21 * Regulators that use regmap for their register I/O can set the
22 * enable_reg and enable_mask fields in their descriptor and then use
23 * this as their is_enabled operation, saving some code.
24 */
regulator_is_enabled_regmap(struct regulator_dev * rdev)25 int regulator_is_enabled_regmap(struct regulator_dev *rdev)
26 {
27 unsigned int val;
28 int ret;
29
30 ret = regmap_read(rdev->regmap, rdev->desc->enable_reg, &val);
31 if (ret != 0)
32 return ret;
33
34 val &= rdev->desc->enable_mask;
35
36 if (rdev->desc->enable_is_inverted) {
37 if (rdev->desc->enable_val)
38 return val != rdev->desc->enable_val;
39 return val == 0;
40 } else {
41 if (rdev->desc->enable_val)
42 return val == rdev->desc->enable_val;
43 return val != 0;
44 }
45 }
46 EXPORT_SYMBOL_GPL(regulator_is_enabled_regmap);
47
48 /**
49 * regulator_enable_regmap - standard enable() for regmap users
50 *
51 * @rdev: regulator to operate on
52 *
53 * Regulators that use regmap for their register I/O can set the
54 * enable_reg and enable_mask fields in their descriptor and then use
55 * this as their enable() operation, saving some code.
56 */
regulator_enable_regmap(struct regulator_dev * rdev)57 int regulator_enable_regmap(struct regulator_dev *rdev)
58 {
59 unsigned int val;
60
61 if (rdev->desc->enable_is_inverted) {
62 val = rdev->desc->disable_val;
63 } else {
64 val = rdev->desc->enable_val;
65 if (!val)
66 val = rdev->desc->enable_mask;
67 }
68
69 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
70 rdev->desc->enable_mask, val);
71 }
72 EXPORT_SYMBOL_GPL(regulator_enable_regmap);
73
74 /**
75 * regulator_disable_regmap - standard disable() for regmap users
76 *
77 * @rdev: regulator to operate on
78 *
79 * Regulators that use regmap for their register I/O can set the
80 * enable_reg and enable_mask fields in their descriptor and then use
81 * this as their disable() operation, saving some code.
82 */
regulator_disable_regmap(struct regulator_dev * rdev)83 int regulator_disable_regmap(struct regulator_dev *rdev)
84 {
85 unsigned int val;
86
87 if (rdev->desc->enable_is_inverted) {
88 val = rdev->desc->enable_val;
89 if (!val)
90 val = rdev->desc->enable_mask;
91 } else {
92 val = rdev->desc->disable_val;
93 }
94
95 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
96 rdev->desc->enable_mask, val);
97 }
98 EXPORT_SYMBOL_GPL(regulator_disable_regmap);
99
regulator_range_selector_to_index(struct regulator_dev * rdev,unsigned int rval)100 static int regulator_range_selector_to_index(struct regulator_dev *rdev,
101 unsigned int rval)
102 {
103 int i;
104
105 if (!rdev->desc->linear_range_selectors)
106 return -EINVAL;
107
108 rval &= rdev->desc->vsel_range_mask;
109
110 for (i = 0; i < rdev->desc->n_linear_ranges; i++) {
111 if (rdev->desc->linear_range_selectors[i] == rval)
112 return i;
113 }
114 return -EINVAL;
115 }
116
117 /**
118 * regulator_get_voltage_sel_pickable_regmap - pickable range get_voltage_sel
119 *
120 * @rdev: regulator to operate on
121 *
122 * Regulators that use regmap for their register I/O and use pickable
123 * ranges can set the vsel_reg, vsel_mask, vsel_range_reg and vsel_range_mask
124 * fields in their descriptor and then use this as their get_voltage_vsel
125 * operation, saving some code.
126 */
regulator_get_voltage_sel_pickable_regmap(struct regulator_dev * rdev)127 int regulator_get_voltage_sel_pickable_regmap(struct regulator_dev *rdev)
128 {
129 unsigned int r_val;
130 int range;
131 unsigned int val;
132 int ret, i;
133 unsigned int voltages_in_range = 0;
134
135 if (!rdev->desc->linear_ranges)
136 return -EINVAL;
137
138 ret = regmap_read(rdev->regmap, rdev->desc->vsel_reg, &val);
139 if (ret != 0)
140 return ret;
141
142 ret = regmap_read(rdev->regmap, rdev->desc->vsel_range_reg, &r_val);
143 if (ret != 0)
144 return ret;
145
146 val &= rdev->desc->vsel_mask;
147 val >>= ffs(rdev->desc->vsel_mask) - 1;
148
149 range = regulator_range_selector_to_index(rdev, r_val);
150 if (range < 0)
151 return -EINVAL;
152
153 for (i = 0; i < range; i++)
154 voltages_in_range += (rdev->desc->linear_ranges[i].max_sel -
155 rdev->desc->linear_ranges[i].min_sel) + 1;
156
157 return val + voltages_in_range;
158 }
159 EXPORT_SYMBOL_GPL(regulator_get_voltage_sel_pickable_regmap);
160
161 /**
162 * regulator_set_voltage_sel_pickable_regmap - pickable range set_voltage_sel
163 *
164 * @rdev: regulator to operate on
165 * @sel: Selector to set
166 *
167 * Regulators that use regmap for their register I/O and use pickable
168 * ranges can set the vsel_reg, vsel_mask, vsel_range_reg and vsel_range_mask
169 * fields in their descriptor and then use this as their set_voltage_vsel
170 * operation, saving some code.
171 */
regulator_set_voltage_sel_pickable_regmap(struct regulator_dev * rdev,unsigned int sel)172 int regulator_set_voltage_sel_pickable_regmap(struct regulator_dev *rdev,
173 unsigned int sel)
174 {
175 unsigned int range;
176 int ret, i;
177 unsigned int voltages_in_range = 0;
178
179 for (i = 0; i < rdev->desc->n_linear_ranges; i++) {
180 voltages_in_range = (rdev->desc->linear_ranges[i].max_sel -
181 rdev->desc->linear_ranges[i].min_sel) + 1;
182 if (sel < voltages_in_range)
183 break;
184 sel -= voltages_in_range;
185 }
186
187 if (i == rdev->desc->n_linear_ranges)
188 return -EINVAL;
189
190 sel <<= ffs(rdev->desc->vsel_mask) - 1;
191 sel += rdev->desc->linear_ranges[i].min_sel;
192
193 range = rdev->desc->linear_range_selectors[i];
194
195 if (rdev->desc->vsel_reg == rdev->desc->vsel_range_reg) {
196 ret = regmap_update_bits(rdev->regmap,
197 rdev->desc->vsel_reg,
198 rdev->desc->vsel_range_mask |
199 rdev->desc->vsel_mask, sel | range);
200 } else {
201 ret = regmap_update_bits(rdev->regmap,
202 rdev->desc->vsel_range_reg,
203 rdev->desc->vsel_range_mask, range);
204 if (ret)
205 return ret;
206
207 ret = regmap_update_bits(rdev->regmap, rdev->desc->vsel_reg,
208 rdev->desc->vsel_mask, sel);
209 }
210
211 if (ret)
212 return ret;
213
214 if (rdev->desc->apply_bit)
215 ret = regmap_update_bits(rdev->regmap, rdev->desc->apply_reg,
216 rdev->desc->apply_bit,
217 rdev->desc->apply_bit);
218 return ret;
219 }
220 EXPORT_SYMBOL_GPL(regulator_set_voltage_sel_pickable_regmap);
221
222 /**
223 * regulator_get_voltage_sel_regmap - standard get_voltage_sel for regmap users
224 *
225 * @rdev: regulator to operate on
226 *
227 * Regulators that use regmap for their register I/O can set the
228 * vsel_reg and vsel_mask fields in their descriptor and then use this
229 * as their get_voltage_vsel operation, saving some code.
230 */
regulator_get_voltage_sel_regmap(struct regulator_dev * rdev)231 int regulator_get_voltage_sel_regmap(struct regulator_dev *rdev)
232 {
233 unsigned int val;
234 int ret;
235
236 ret = regmap_read(rdev->regmap, rdev->desc->vsel_reg, &val);
237 if (ret != 0)
238 return ret;
239
240 val &= rdev->desc->vsel_mask;
241 val >>= ffs(rdev->desc->vsel_mask) - 1;
242
243 return val;
244 }
245 EXPORT_SYMBOL_GPL(regulator_get_voltage_sel_regmap);
246
247 /**
248 * regulator_set_voltage_sel_regmap - standard set_voltage_sel for regmap users
249 *
250 * @rdev: regulator to operate on
251 * @sel: Selector to set
252 *
253 * Regulators that use regmap for their register I/O can set the
254 * vsel_reg and vsel_mask fields in their descriptor and then use this
255 * as their set_voltage_vsel operation, saving some code.
256 */
regulator_set_voltage_sel_regmap(struct regulator_dev * rdev,unsigned sel)257 int regulator_set_voltage_sel_regmap(struct regulator_dev *rdev, unsigned sel)
258 {
259 int ret;
260
261 sel <<= ffs(rdev->desc->vsel_mask) - 1;
262
263 ret = regmap_update_bits(rdev->regmap, rdev->desc->vsel_reg,
264 rdev->desc->vsel_mask, sel);
265 if (ret)
266 return ret;
267
268 if (rdev->desc->apply_bit)
269 ret = regmap_update_bits(rdev->regmap, rdev->desc->apply_reg,
270 rdev->desc->apply_bit,
271 rdev->desc->apply_bit);
272 return ret;
273 }
274 EXPORT_SYMBOL_GPL(regulator_set_voltage_sel_regmap);
275
276 /**
277 * regulator_map_voltage_iterate - map_voltage() based on list_voltage()
278 *
279 * @rdev: Regulator to operate on
280 * @min_uV: Lower bound for voltage
281 * @max_uV: Upper bound for voltage
282 *
283 * Drivers implementing set_voltage_sel() and list_voltage() can use
284 * this as their map_voltage() operation. It will find a suitable
285 * voltage by calling list_voltage() until it gets something in bounds
286 * for the requested voltages.
287 */
regulator_map_voltage_iterate(struct regulator_dev * rdev,int min_uV,int max_uV)288 int regulator_map_voltage_iterate(struct regulator_dev *rdev,
289 int min_uV, int max_uV)
290 {
291 int best_val = INT_MAX;
292 int selector = 0;
293 int i, ret;
294
295 /* Find the smallest voltage that falls within the specified
296 * range.
297 */
298 for (i = 0; i < rdev->desc->n_voltages; i++) {
299 ret = rdev->desc->ops->list_voltage(rdev, i);
300 if (ret < 0)
301 continue;
302
303 if (ret < best_val && ret >= min_uV && ret <= max_uV) {
304 best_val = ret;
305 selector = i;
306 }
307 }
308
309 if (best_val != INT_MAX)
310 return selector;
311 else
312 return -EINVAL;
313 }
314 EXPORT_SYMBOL_GPL(regulator_map_voltage_iterate);
315
316 /**
317 * regulator_map_voltage_ascend - map_voltage() for ascendant voltage list
318 *
319 * @rdev: Regulator to operate on
320 * @min_uV: Lower bound for voltage
321 * @max_uV: Upper bound for voltage
322 *
323 * Drivers that have ascendant voltage list can use this as their
324 * map_voltage() operation.
325 */
regulator_map_voltage_ascend(struct regulator_dev * rdev,int min_uV,int max_uV)326 int regulator_map_voltage_ascend(struct regulator_dev *rdev,
327 int min_uV, int max_uV)
328 {
329 int i, ret;
330
331 for (i = 0; i < rdev->desc->n_voltages; i++) {
332 ret = rdev->desc->ops->list_voltage(rdev, i);
333 if (ret < 0)
334 continue;
335
336 if (ret > max_uV)
337 break;
338
339 if (ret >= min_uV && ret <= max_uV)
340 return i;
341 }
342
343 return -EINVAL;
344 }
345 EXPORT_SYMBOL_GPL(regulator_map_voltage_ascend);
346
347 /**
348 * regulator_map_voltage_linear - map_voltage() for simple linear mappings
349 *
350 * @rdev: Regulator to operate on
351 * @min_uV: Lower bound for voltage
352 * @max_uV: Upper bound for voltage
353 *
354 * Drivers providing min_uV and uV_step in their regulator_desc can
355 * use this as their map_voltage() operation.
356 */
regulator_map_voltage_linear(struct regulator_dev * rdev,int min_uV,int max_uV)357 int regulator_map_voltage_linear(struct regulator_dev *rdev,
358 int min_uV, int max_uV)
359 {
360 int ret, voltage;
361
362 /* Allow uV_step to be 0 for fixed voltage */
363 if (rdev->desc->n_voltages == 1 && rdev->desc->uV_step == 0) {
364 if (min_uV <= rdev->desc->min_uV && rdev->desc->min_uV <= max_uV)
365 return 0;
366 else
367 return -EINVAL;
368 }
369
370 if (!rdev->desc->uV_step) {
371 BUG_ON(!rdev->desc->uV_step);
372 return -EINVAL;
373 }
374
375 if (min_uV < rdev->desc->min_uV)
376 min_uV = rdev->desc->min_uV;
377
378 ret = DIV_ROUND_UP(min_uV - rdev->desc->min_uV, rdev->desc->uV_step);
379 if (ret < 0)
380 return ret;
381
382 ret += rdev->desc->linear_min_sel;
383
384 /* Map back into a voltage to verify we're still in bounds */
385 voltage = rdev->desc->ops->list_voltage(rdev, ret);
386 if (voltage < min_uV || voltage > max_uV)
387 return -EINVAL;
388
389 return ret;
390 }
391 EXPORT_SYMBOL_GPL(regulator_map_voltage_linear);
392
393 /**
394 * regulator_map_voltage_linear_range - map_voltage() for multiple linear ranges
395 *
396 * @rdev: Regulator to operate on
397 * @min_uV: Lower bound for voltage
398 * @max_uV: Upper bound for voltage
399 *
400 * Drivers providing linear_ranges in their descriptor can use this as
401 * their map_voltage() callback.
402 */
regulator_map_voltage_linear_range(struct regulator_dev * rdev,int min_uV,int max_uV)403 int regulator_map_voltage_linear_range(struct regulator_dev *rdev,
404 int min_uV, int max_uV)
405 {
406 const struct regulator_linear_range *range;
407 int ret = -EINVAL;
408 int voltage, i;
409
410 if (!rdev->desc->n_linear_ranges) {
411 BUG_ON(!rdev->desc->n_linear_ranges);
412 return -EINVAL;
413 }
414
415 for (i = 0; i < rdev->desc->n_linear_ranges; i++) {
416 int linear_max_uV;
417
418 range = &rdev->desc->linear_ranges[i];
419 linear_max_uV = range->min_uV +
420 (range->max_sel - range->min_sel) * range->uV_step;
421
422 if (!(min_uV <= linear_max_uV && max_uV >= range->min_uV))
423 continue;
424
425 if (min_uV <= range->min_uV)
426 min_uV = range->min_uV;
427
428 /* range->uV_step == 0 means fixed voltage range */
429 if (range->uV_step == 0) {
430 ret = 0;
431 } else {
432 ret = DIV_ROUND_UP(min_uV - range->min_uV,
433 range->uV_step);
434 if (ret < 0)
435 return ret;
436 }
437
438 ret += range->min_sel;
439
440 /*
441 * Map back into a voltage to verify we're still in bounds.
442 * If we are not, then continue checking rest of the ranges.
443 */
444 voltage = rdev->desc->ops->list_voltage(rdev, ret);
445 if (voltage >= min_uV && voltage <= max_uV)
446 break;
447 }
448
449 if (i == rdev->desc->n_linear_ranges)
450 return -EINVAL;
451
452 return ret;
453 }
454 EXPORT_SYMBOL_GPL(regulator_map_voltage_linear_range);
455
456 /**
457 * regulator_map_voltage_pickable_linear_range - map_voltage, pickable ranges
458 *
459 * @rdev: Regulator to operate on
460 * @min_uV: Lower bound for voltage
461 * @max_uV: Upper bound for voltage
462 *
463 * Drivers providing pickable linear_ranges in their descriptor can use
464 * this as their map_voltage() callback.
465 */
regulator_map_voltage_pickable_linear_range(struct regulator_dev * rdev,int min_uV,int max_uV)466 int regulator_map_voltage_pickable_linear_range(struct regulator_dev *rdev,
467 int min_uV, int max_uV)
468 {
469 const struct regulator_linear_range *range;
470 int ret = -EINVAL;
471 int voltage, i;
472 unsigned int selector = 0;
473
474 if (!rdev->desc->n_linear_ranges) {
475 BUG_ON(!rdev->desc->n_linear_ranges);
476 return -EINVAL;
477 }
478
479 for (i = 0; i < rdev->desc->n_linear_ranges; i++) {
480 int linear_max_uV;
481
482 range = &rdev->desc->linear_ranges[i];
483 linear_max_uV = range->min_uV +
484 (range->max_sel - range->min_sel) * range->uV_step;
485
486 if (!(min_uV <= linear_max_uV && max_uV >= range->min_uV)) {
487 selector += (range->max_sel - range->min_sel + 1);
488 continue;
489 }
490
491 if (min_uV <= range->min_uV)
492 min_uV = range->min_uV;
493
494 /* range->uV_step == 0 means fixed voltage range */
495 if (range->uV_step == 0) {
496 ret = 0;
497 } else {
498 ret = DIV_ROUND_UP(min_uV - range->min_uV,
499 range->uV_step);
500 if (ret < 0)
501 return ret;
502 }
503
504 ret += selector;
505
506 voltage = rdev->desc->ops->list_voltage(rdev, ret);
507
508 /*
509 * Map back into a voltage to verify we're still in bounds.
510 * We may have overlapping voltage ranges. Hence we don't
511 * exit but retry until we have checked all ranges.
512 */
513 if (voltage < min_uV || voltage > max_uV)
514 selector += (range->max_sel - range->min_sel + 1);
515 else
516 break;
517 }
518
519 if (i == rdev->desc->n_linear_ranges)
520 return -EINVAL;
521
522 return ret;
523 }
524 EXPORT_SYMBOL_GPL(regulator_map_voltage_pickable_linear_range);
525
526 /**
527 * regulator_list_voltage_linear - List voltages with simple calculation
528 *
529 * @rdev: Regulator device
530 * @selector: Selector to convert into a voltage
531 *
532 * Regulators with a simple linear mapping between voltages and
533 * selectors can set min_uV and uV_step in the regulator descriptor
534 * and then use this function as their list_voltage() operation,
535 */
regulator_list_voltage_linear(struct regulator_dev * rdev,unsigned int selector)536 int regulator_list_voltage_linear(struct regulator_dev *rdev,
537 unsigned int selector)
538 {
539 if (selector >= rdev->desc->n_voltages)
540 return -EINVAL;
541 if (selector < rdev->desc->linear_min_sel)
542 return 0;
543
544 selector -= rdev->desc->linear_min_sel;
545
546 return rdev->desc->min_uV + (rdev->desc->uV_step * selector);
547 }
548 EXPORT_SYMBOL_GPL(regulator_list_voltage_linear);
549
550 /**
551 * regulator_list_voltage_pickable_linear_range - pickable range list voltages
552 *
553 * @rdev: Regulator device
554 * @selector: Selector to convert into a voltage
555 *
556 * list_voltage() operation, intended to be used by drivers utilizing pickable
557 * ranges helpers.
558 */
regulator_list_voltage_pickable_linear_range(struct regulator_dev * rdev,unsigned int selector)559 int regulator_list_voltage_pickable_linear_range(struct regulator_dev *rdev,
560 unsigned int selector)
561 {
562 const struct regulator_linear_range *range;
563 int i;
564 unsigned int all_sels = 0;
565
566 if (!rdev->desc->n_linear_ranges) {
567 BUG_ON(!rdev->desc->n_linear_ranges);
568 return -EINVAL;
569 }
570
571 for (i = 0; i < rdev->desc->n_linear_ranges; i++) {
572 unsigned int sels_in_range;
573
574 range = &rdev->desc->linear_ranges[i];
575
576 sels_in_range = range->max_sel - range->min_sel;
577
578 if (all_sels + sels_in_range >= selector) {
579 selector -= all_sels;
580 return range->min_uV + (range->uV_step * selector);
581 }
582
583 all_sels += (sels_in_range + 1);
584 }
585
586 return -EINVAL;
587 }
588 EXPORT_SYMBOL_GPL(regulator_list_voltage_pickable_linear_range);
589
590 /**
591 * regulator_desc_list_voltage_linear_range - List voltages for linear ranges
592 *
593 * @desc: Regulator desc for regulator which volatges are to be listed
594 * @selector: Selector to convert into a voltage
595 *
596 * Regulators with a series of simple linear mappings between voltages
597 * and selectors who have set linear_ranges in the regulator descriptor
598 * can use this function prior regulator registration to list voltages.
599 * This is useful when voltages need to be listed during device-tree
600 * parsing.
601 */
regulator_desc_list_voltage_linear_range(const struct regulator_desc * desc,unsigned int selector)602 int regulator_desc_list_voltage_linear_range(const struct regulator_desc *desc,
603 unsigned int selector)
604 {
605 const struct regulator_linear_range *range;
606 int i;
607
608 if (!desc->n_linear_ranges) {
609 BUG_ON(!desc->n_linear_ranges);
610 return -EINVAL;
611 }
612
613 for (i = 0; i < desc->n_linear_ranges; i++) {
614 range = &desc->linear_ranges[i];
615
616 if (!(selector >= range->min_sel &&
617 selector <= range->max_sel))
618 continue;
619
620 selector -= range->min_sel;
621
622 return range->min_uV + (range->uV_step * selector);
623 }
624
625 return -EINVAL;
626 }
627 EXPORT_SYMBOL_GPL(regulator_desc_list_voltage_linear_range);
628
629 /**
630 * regulator_list_voltage_linear_range - List voltages for linear ranges
631 *
632 * @rdev: Regulator device
633 * @selector: Selector to convert into a voltage
634 *
635 * Regulators with a series of simple linear mappings between voltages
636 * and selectors can set linear_ranges in the regulator descriptor and
637 * then use this function as their list_voltage() operation,
638 */
regulator_list_voltage_linear_range(struct regulator_dev * rdev,unsigned int selector)639 int regulator_list_voltage_linear_range(struct regulator_dev *rdev,
640 unsigned int selector)
641 {
642 return regulator_desc_list_voltage_linear_range(rdev->desc, selector);
643 }
644 EXPORT_SYMBOL_GPL(regulator_list_voltage_linear_range);
645
646 /**
647 * regulator_list_voltage_table - List voltages with table based mapping
648 *
649 * @rdev: Regulator device
650 * @selector: Selector to convert into a voltage
651 *
652 * Regulators with table based mapping between voltages and
653 * selectors can set volt_table in the regulator descriptor
654 * and then use this function as their list_voltage() operation.
655 */
regulator_list_voltage_table(struct regulator_dev * rdev,unsigned int selector)656 int regulator_list_voltage_table(struct regulator_dev *rdev,
657 unsigned int selector)
658 {
659 if (!rdev->desc->volt_table) {
660 BUG_ON(!rdev->desc->volt_table);
661 return -EINVAL;
662 }
663
664 if (selector >= rdev->desc->n_voltages)
665 return -EINVAL;
666
667 return rdev->desc->volt_table[selector];
668 }
669 EXPORT_SYMBOL_GPL(regulator_list_voltage_table);
670
671 /**
672 * regulator_set_bypass_regmap - Default set_bypass() using regmap
673 *
674 * @rdev: device to operate on.
675 * @enable: state to set.
676 */
regulator_set_bypass_regmap(struct regulator_dev * rdev,bool enable)677 int regulator_set_bypass_regmap(struct regulator_dev *rdev, bool enable)
678 {
679 unsigned int val;
680
681 if (enable) {
682 val = rdev->desc->bypass_val_on;
683 if (!val)
684 val = rdev->desc->bypass_mask;
685 } else {
686 val = rdev->desc->bypass_val_off;
687 }
688
689 return regmap_update_bits(rdev->regmap, rdev->desc->bypass_reg,
690 rdev->desc->bypass_mask, val);
691 }
692 EXPORT_SYMBOL_GPL(regulator_set_bypass_regmap);
693
694 /**
695 * regulator_set_soft_start_regmap - Default set_soft_start() using regmap
696 *
697 * @rdev: device to operate on.
698 */
regulator_set_soft_start_regmap(struct regulator_dev * rdev)699 int regulator_set_soft_start_regmap(struct regulator_dev *rdev)
700 {
701 unsigned int val;
702
703 val = rdev->desc->soft_start_val_on;
704 if (!val)
705 val = rdev->desc->soft_start_mask;
706
707 return regmap_update_bits(rdev->regmap, rdev->desc->soft_start_reg,
708 rdev->desc->soft_start_mask, val);
709 }
710 EXPORT_SYMBOL_GPL(regulator_set_soft_start_regmap);
711
712 /**
713 * regulator_set_pull_down_regmap - Default set_pull_down() using regmap
714 *
715 * @rdev: device to operate on.
716 */
regulator_set_pull_down_regmap(struct regulator_dev * rdev)717 int regulator_set_pull_down_regmap(struct regulator_dev *rdev)
718 {
719 unsigned int val;
720
721 val = rdev->desc->pull_down_val_on;
722 if (!val)
723 val = rdev->desc->pull_down_mask;
724
725 return regmap_update_bits(rdev->regmap, rdev->desc->pull_down_reg,
726 rdev->desc->pull_down_mask, val);
727 }
728 EXPORT_SYMBOL_GPL(regulator_set_pull_down_regmap);
729
730 /**
731 * regulator_get_bypass_regmap - Default get_bypass() using regmap
732 *
733 * @rdev: device to operate on.
734 * @enable: current state.
735 */
regulator_get_bypass_regmap(struct regulator_dev * rdev,bool * enable)736 int regulator_get_bypass_regmap(struct regulator_dev *rdev, bool *enable)
737 {
738 unsigned int val;
739 unsigned int val_on = rdev->desc->bypass_val_on;
740 int ret;
741
742 ret = regmap_read(rdev->regmap, rdev->desc->bypass_reg, &val);
743 if (ret != 0)
744 return ret;
745
746 if (!val_on)
747 val_on = rdev->desc->bypass_mask;
748
749 *enable = (val & rdev->desc->bypass_mask) == val_on;
750
751 return 0;
752 }
753 EXPORT_SYMBOL_GPL(regulator_get_bypass_regmap);
754
755 /**
756 * regulator_set_active_discharge_regmap - Default set_active_discharge()
757 * using regmap
758 *
759 * @rdev: device to operate on.
760 * @enable: state to set, 0 to disable and 1 to enable.
761 */
regulator_set_active_discharge_regmap(struct regulator_dev * rdev,bool enable)762 int regulator_set_active_discharge_regmap(struct regulator_dev *rdev,
763 bool enable)
764 {
765 unsigned int val;
766
767 if (enable)
768 val = rdev->desc->active_discharge_on;
769 else
770 val = rdev->desc->active_discharge_off;
771
772 return regmap_update_bits(rdev->regmap,
773 rdev->desc->active_discharge_reg,
774 rdev->desc->active_discharge_mask, val);
775 }
776 EXPORT_SYMBOL_GPL(regulator_set_active_discharge_regmap);
777
778 /**
779 * regulator_set_current_limit_regmap - set_current_limit for regmap users
780 *
781 * @rdev: regulator to operate on
782 * @min_uA: Lower bound for current limit
783 * @max_uA: Upper bound for current limit
784 *
785 * Regulators that use regmap for their register I/O can set curr_table,
786 * csel_reg and csel_mask fields in their descriptor and then use this
787 * as their set_current_limit operation, saving some code.
788 */
regulator_set_current_limit_regmap(struct regulator_dev * rdev,int min_uA,int max_uA)789 int regulator_set_current_limit_regmap(struct regulator_dev *rdev,
790 int min_uA, int max_uA)
791 {
792 unsigned int n_currents = rdev->desc->n_current_limits;
793 int i, sel = -1;
794
795 if (n_currents == 0)
796 return -EINVAL;
797
798 if (rdev->desc->curr_table) {
799 const unsigned int *curr_table = rdev->desc->curr_table;
800 bool ascend = curr_table[n_currents - 1] > curr_table[0];
801
802 /* search for closest to maximum */
803 if (ascend) {
804 for (i = n_currents - 1; i >= 0; i--) {
805 if (min_uA <= curr_table[i] &&
806 curr_table[i] <= max_uA) {
807 sel = i;
808 break;
809 }
810 }
811 } else {
812 for (i = 0; i < n_currents; i++) {
813 if (min_uA <= curr_table[i] &&
814 curr_table[i] <= max_uA) {
815 sel = i;
816 break;
817 }
818 }
819 }
820 }
821
822 if (sel < 0)
823 return -EINVAL;
824
825 sel <<= ffs(rdev->desc->csel_mask) - 1;
826
827 return regmap_update_bits(rdev->regmap, rdev->desc->csel_reg,
828 rdev->desc->csel_mask, sel);
829 }
830 EXPORT_SYMBOL_GPL(regulator_set_current_limit_regmap);
831
832 /**
833 * regulator_get_current_limit_regmap - get_current_limit for regmap users
834 *
835 * @rdev: regulator to operate on
836 *
837 * Regulators that use regmap for their register I/O can set the
838 * csel_reg and csel_mask fields in their descriptor and then use this
839 * as their get_current_limit operation, saving some code.
840 */
regulator_get_current_limit_regmap(struct regulator_dev * rdev)841 int regulator_get_current_limit_regmap(struct regulator_dev *rdev)
842 {
843 unsigned int val;
844 int ret;
845
846 ret = regmap_read(rdev->regmap, rdev->desc->csel_reg, &val);
847 if (ret != 0)
848 return ret;
849
850 val &= rdev->desc->csel_mask;
851 val >>= ffs(rdev->desc->csel_mask) - 1;
852
853 if (rdev->desc->curr_table) {
854 if (val >= rdev->desc->n_current_limits)
855 return -EINVAL;
856
857 return rdev->desc->curr_table[val];
858 }
859
860 return -EINVAL;
861 }
862 EXPORT_SYMBOL_GPL(regulator_get_current_limit_regmap);
863
864 /**
865 * regulator_bulk_set_supply_names - initialize the 'supply' fields in an array
866 * of regulator_bulk_data structs
867 *
868 * @consumers: array of regulator_bulk_data entries to initialize
869 * @supply_names: array of supply name strings
870 * @num_supplies: number of supply names to initialize
871 *
872 * Note: the 'consumers' array must be the size of 'num_supplies'.
873 */
regulator_bulk_set_supply_names(struct regulator_bulk_data * consumers,const char * const * supply_names,unsigned int num_supplies)874 void regulator_bulk_set_supply_names(struct regulator_bulk_data *consumers,
875 const char *const *supply_names,
876 unsigned int num_supplies)
877 {
878 unsigned int i;
879
880 for (i = 0; i < num_supplies; i++)
881 consumers[i].supply = supply_names[i];
882 }
883 EXPORT_SYMBOL_GPL(regulator_bulk_set_supply_names);
884