1 // SPDX-License-Identifier: GPL-2.0-or-later
3 // helpers.c -- Voltage/Current Regulator framework helper functions.
5 // Copyright 2007, 2008 Wolfson Microelectronics PLC.
6 // Copyright 2008 SlimLogic Ltd.
8 #include <linux/kernel.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>
19 * regulator_is_enabled_regmap - standard is_enabled() for regmap users
21 * @rdev: regulator to operate on
23 * Regulators that use regmap for their register I/O can set the
24 * enable_reg and enable_mask fields in their descriptor and then use
25 * this as their is_enabled operation, saving some code.
27 int regulator_is_enabled_regmap(struct regulator_dev *rdev)
32 ret = regmap_read(rdev->regmap, rdev->desc->enable_reg, &val);
36 val &= rdev->desc->enable_mask;
38 if (rdev->desc->enable_is_inverted) {
39 if (rdev->desc->enable_val)
40 return val != rdev->desc->enable_val;
43 if (rdev->desc->enable_val)
44 return val == rdev->desc->enable_val;
48 EXPORT_SYMBOL_GPL(regulator_is_enabled_regmap);
51 * regulator_enable_regmap - standard enable() for regmap users
53 * @rdev: regulator to operate on
55 * Regulators that use regmap for their register I/O can set the
56 * enable_reg and enable_mask fields in their descriptor and then use
57 * this as their enable() operation, saving some code.
59 int regulator_enable_regmap(struct regulator_dev *rdev)
63 if (rdev->desc->enable_is_inverted) {
64 val = rdev->desc->disable_val;
66 val = rdev->desc->enable_val;
68 val = rdev->desc->enable_mask;
71 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
72 rdev->desc->enable_mask, val);
74 EXPORT_SYMBOL_GPL(regulator_enable_regmap);
77 * regulator_disable_regmap - standard disable() for regmap users
79 * @rdev: regulator to operate on
81 * Regulators that use regmap for their register I/O can set the
82 * enable_reg and enable_mask fields in their descriptor and then use
83 * this as their disable() operation, saving some code.
85 int regulator_disable_regmap(struct regulator_dev *rdev)
89 if (rdev->desc->enable_is_inverted) {
90 val = rdev->desc->enable_val;
92 val = rdev->desc->enable_mask;
94 val = rdev->desc->disable_val;
97 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
98 rdev->desc->enable_mask, val);
100 EXPORT_SYMBOL_GPL(regulator_disable_regmap);
102 static int regulator_range_selector_to_index(struct regulator_dev *rdev,
107 if (!rdev->desc->linear_range_selectors)
110 rval &= rdev->desc->vsel_range_mask;
112 for (i = 0; i < rdev->desc->n_linear_ranges; i++) {
113 if (rdev->desc->linear_range_selectors[i] == rval)
120 * regulator_get_voltage_sel_pickable_regmap - pickable range get_voltage_sel
122 * @rdev: regulator to operate on
124 * Regulators that use regmap for their register I/O and use pickable
125 * ranges can set the vsel_reg, vsel_mask, vsel_range_reg and vsel_range_mask
126 * fields in their descriptor and then use this as their get_voltage_vsel
127 * operation, saving some code.
129 int regulator_get_voltage_sel_pickable_regmap(struct regulator_dev *rdev)
135 unsigned int voltages = 0;
136 const struct linear_range *r = rdev->desc->linear_ranges;
141 ret = regmap_read(rdev->regmap, rdev->desc->vsel_reg, &val);
145 ret = regmap_read(rdev->regmap, rdev->desc->vsel_range_reg, &r_val);
149 val &= rdev->desc->vsel_mask;
150 val >>= ffs(rdev->desc->vsel_mask) - 1;
152 range = regulator_range_selector_to_index(rdev, r_val);
156 voltages = linear_range_values_in_range_array(r, range);
158 return val + voltages;
160 EXPORT_SYMBOL_GPL(regulator_get_voltage_sel_pickable_regmap);
163 * regulator_set_voltage_sel_pickable_regmap - pickable range set_voltage_sel
165 * @rdev: regulator to operate on
166 * @sel: Selector to set
168 * Regulators that use regmap for their register I/O and use pickable
169 * ranges can set the vsel_reg, vsel_mask, vsel_range_reg and vsel_range_mask
170 * fields in their descriptor and then use this as their set_voltage_vsel
171 * operation, saving some code.
173 int regulator_set_voltage_sel_pickable_regmap(struct regulator_dev *rdev,
178 unsigned int voltages_in_range = 0;
180 for (i = 0; i < rdev->desc->n_linear_ranges; i++) {
181 const struct linear_range *r;
183 r = &rdev->desc->linear_ranges[i];
184 voltages_in_range = linear_range_values_in_range(r);
186 if (sel < voltages_in_range)
188 sel -= voltages_in_range;
191 if (i == rdev->desc->n_linear_ranges)
194 sel <<= ffs(rdev->desc->vsel_mask) - 1;
195 sel += rdev->desc->linear_ranges[i].min_sel;
197 range = rdev->desc->linear_range_selectors[i];
199 if (rdev->desc->vsel_reg == rdev->desc->vsel_range_reg) {
200 ret = regmap_update_bits(rdev->regmap,
201 rdev->desc->vsel_reg,
202 rdev->desc->vsel_range_mask |
203 rdev->desc->vsel_mask, sel | range);
205 ret = regmap_update_bits(rdev->regmap,
206 rdev->desc->vsel_range_reg,
207 rdev->desc->vsel_range_mask, range);
211 ret = regmap_update_bits(rdev->regmap, rdev->desc->vsel_reg,
212 rdev->desc->vsel_mask, sel);
218 if (rdev->desc->apply_bit)
219 ret = regmap_update_bits(rdev->regmap, rdev->desc->apply_reg,
220 rdev->desc->apply_bit,
221 rdev->desc->apply_bit);
224 EXPORT_SYMBOL_GPL(regulator_set_voltage_sel_pickable_regmap);
227 * regulator_get_voltage_sel_regmap - standard get_voltage_sel for regmap users
229 * @rdev: regulator to operate on
231 * Regulators that use regmap for their register I/O can set the
232 * vsel_reg and vsel_mask fields in their descriptor and then use this
233 * as their get_voltage_vsel operation, saving some code.
235 int regulator_get_voltage_sel_regmap(struct regulator_dev *rdev)
240 ret = regmap_read(rdev->regmap, rdev->desc->vsel_reg, &val);
244 val &= rdev->desc->vsel_mask;
245 val >>= ffs(rdev->desc->vsel_mask) - 1;
249 EXPORT_SYMBOL_GPL(regulator_get_voltage_sel_regmap);
252 * regulator_set_voltage_sel_regmap - standard set_voltage_sel for regmap users
254 * @rdev: regulator to operate on
255 * @sel: Selector to set
257 * Regulators that use regmap for their register I/O can set the
258 * vsel_reg and vsel_mask fields in their descriptor and then use this
259 * as their set_voltage_vsel operation, saving some code.
261 int regulator_set_voltage_sel_regmap(struct regulator_dev *rdev, unsigned sel)
265 sel <<= ffs(rdev->desc->vsel_mask) - 1;
267 ret = regmap_update_bits(rdev->regmap, rdev->desc->vsel_reg,
268 rdev->desc->vsel_mask, sel);
272 if (rdev->desc->apply_bit)
273 ret = regmap_update_bits(rdev->regmap, rdev->desc->apply_reg,
274 rdev->desc->apply_bit,
275 rdev->desc->apply_bit);
278 EXPORT_SYMBOL_GPL(regulator_set_voltage_sel_regmap);
281 * regulator_map_voltage_iterate - map_voltage() based on list_voltage()
283 * @rdev: Regulator to operate on
284 * @min_uV: Lower bound for voltage
285 * @max_uV: Upper bound for voltage
287 * Drivers implementing set_voltage_sel() and list_voltage() can use
288 * this as their map_voltage() operation. It will find a suitable
289 * voltage by calling list_voltage() until it gets something in bounds
290 * for the requested voltages.
292 int regulator_map_voltage_iterate(struct regulator_dev *rdev,
293 int min_uV, int max_uV)
295 int best_val = INT_MAX;
299 /* Find the smallest voltage that falls within the specified
302 for (i = 0; i < rdev->desc->n_voltages; i++) {
303 ret = rdev->desc->ops->list_voltage(rdev, i);
307 if (ret < best_val && ret >= min_uV && ret <= max_uV) {
313 if (best_val != INT_MAX)
318 EXPORT_SYMBOL_GPL(regulator_map_voltage_iterate);
321 * regulator_map_voltage_ascend - map_voltage() for ascendant voltage list
323 * @rdev: Regulator to operate on
324 * @min_uV: Lower bound for voltage
325 * @max_uV: Upper bound for voltage
327 * Drivers that have ascendant voltage list can use this as their
328 * map_voltage() operation.
330 int regulator_map_voltage_ascend(struct regulator_dev *rdev,
331 int min_uV, int max_uV)
335 for (i = 0; i < rdev->desc->n_voltages; i++) {
336 ret = rdev->desc->ops->list_voltage(rdev, i);
343 if (ret >= min_uV && ret <= max_uV)
349 EXPORT_SYMBOL_GPL(regulator_map_voltage_ascend);
352 * regulator_map_voltage_linear - map_voltage() for simple linear mappings
354 * @rdev: Regulator to operate on
355 * @min_uV: Lower bound for voltage
356 * @max_uV: Upper bound for voltage
358 * Drivers providing min_uV and uV_step in their regulator_desc can
359 * use this as their map_voltage() operation.
361 int regulator_map_voltage_linear(struct regulator_dev *rdev,
362 int min_uV, int max_uV)
366 /* Allow uV_step to be 0 for fixed voltage */
367 if (rdev->desc->n_voltages == 1 && rdev->desc->uV_step == 0) {
368 if (min_uV <= rdev->desc->min_uV && rdev->desc->min_uV <= max_uV)
374 if (!rdev->desc->uV_step) {
375 BUG_ON(!rdev->desc->uV_step);
379 if (min_uV < rdev->desc->min_uV)
380 min_uV = rdev->desc->min_uV;
382 ret = DIV_ROUND_UP(min_uV - rdev->desc->min_uV, rdev->desc->uV_step);
386 ret += rdev->desc->linear_min_sel;
388 /* Map back into a voltage to verify we're still in bounds */
389 voltage = rdev->desc->ops->list_voltage(rdev, ret);
390 if (voltage < min_uV || voltage > max_uV)
395 EXPORT_SYMBOL_GPL(regulator_map_voltage_linear);
398 * regulator_map_voltage_linear_range - map_voltage() for multiple linear ranges
400 * @rdev: Regulator to operate on
401 * @min_uV: Lower bound for voltage
402 * @max_uV: Upper bound for voltage
404 * Drivers providing linear_ranges in their descriptor can use this as
405 * their map_voltage() callback.
407 int regulator_map_voltage_linear_range(struct regulator_dev *rdev,
408 int min_uV, int max_uV)
410 const struct linear_range *range;
416 if (!rdev->desc->n_linear_ranges) {
417 BUG_ON(!rdev->desc->n_linear_ranges);
421 for (i = 0; i < rdev->desc->n_linear_ranges; i++) {
422 range = &rdev->desc->linear_ranges[i];
424 ret = linear_range_get_selector_high(range, min_uV, &sel,
431 * Map back into a voltage to verify we're still in bounds.
432 * If we are not, then continue checking rest of the ranges.
434 voltage = rdev->desc->ops->list_voltage(rdev, sel);
435 if (voltage >= min_uV && voltage <= max_uV)
439 if (i == rdev->desc->n_linear_ranges)
444 EXPORT_SYMBOL_GPL(regulator_map_voltage_linear_range);
447 * regulator_map_voltage_pickable_linear_range - map_voltage, pickable ranges
449 * @rdev: Regulator to operate on
450 * @min_uV: Lower bound for voltage
451 * @max_uV: Upper bound for voltage
453 * Drivers providing pickable linear_ranges in their descriptor can use
454 * this as their map_voltage() callback.
456 int regulator_map_voltage_pickable_linear_range(struct regulator_dev *rdev,
457 int min_uV, int max_uV)
459 const struct linear_range *range;
462 unsigned int selector = 0;
464 if (!rdev->desc->n_linear_ranges) {
465 BUG_ON(!rdev->desc->n_linear_ranges);
469 for (i = 0; i < rdev->desc->n_linear_ranges; i++) {
474 range = &rdev->desc->linear_ranges[i];
475 linear_max_uV = linear_range_get_max_value(range);
477 if (!(min_uV <= linear_max_uV && max_uV >= range->min)) {
478 selector += linear_range_values_in_range(range);
482 ret = linear_range_get_selector_high(range, min_uV, &sel,
485 selector += linear_range_values_in_range(range);
489 ret = selector + sel - range->min_sel;
491 voltage = rdev->desc->ops->list_voltage(rdev, ret);
494 * Map back into a voltage to verify we're still in bounds.
495 * We may have overlapping voltage ranges. Hence we don't
496 * exit but retry until we have checked all ranges.
498 if (voltage < min_uV || voltage > max_uV)
499 selector += linear_range_values_in_range(range);
504 if (i == rdev->desc->n_linear_ranges)
509 EXPORT_SYMBOL_GPL(regulator_map_voltage_pickable_linear_range);
512 * regulator_desc_list_voltage_linear - List voltages with simple calculation
514 * @desc: Regulator desc for regulator which volatges are to be listed
515 * @selector: Selector to convert into a voltage
517 * Regulators with a simple linear mapping between voltages and
518 * selectors can set min_uV and uV_step in the regulator descriptor
519 * and then use this function prior regulator registration to list
520 * the voltages. This is useful when voltages need to be listed during
521 * device-tree parsing.
523 int regulator_desc_list_voltage_linear(const struct regulator_desc *desc,
524 unsigned int selector)
526 if (selector >= desc->n_voltages)
529 if (selector < desc->linear_min_sel)
532 selector -= desc->linear_min_sel;
534 return desc->min_uV + (desc->uV_step * selector);
536 EXPORT_SYMBOL_GPL(regulator_desc_list_voltage_linear);
539 * regulator_list_voltage_linear - List voltages with simple calculation
541 * @rdev: Regulator device
542 * @selector: Selector to convert into a voltage
544 * Regulators with a simple linear mapping between voltages and
545 * selectors can set min_uV and uV_step in the regulator descriptor
546 * and then use this function as their list_voltage() operation,
548 int regulator_list_voltage_linear(struct regulator_dev *rdev,
549 unsigned int selector)
551 return regulator_desc_list_voltage_linear(rdev->desc, selector);
553 EXPORT_SYMBOL_GPL(regulator_list_voltage_linear);
556 * regulator_list_voltage_pickable_linear_range - pickable range list voltages
558 * @rdev: Regulator device
559 * @selector: Selector to convert into a voltage
561 * list_voltage() operation, intended to be used by drivers utilizing pickable
564 int regulator_list_voltage_pickable_linear_range(struct regulator_dev *rdev,
565 unsigned int selector)
567 const struct linear_range *range;
569 unsigned int all_sels = 0;
571 if (!rdev->desc->n_linear_ranges) {
572 BUG_ON(!rdev->desc->n_linear_ranges);
576 for (i = 0; i < rdev->desc->n_linear_ranges; i++) {
577 unsigned int sel_indexes;
579 range = &rdev->desc->linear_ranges[i];
581 sel_indexes = linear_range_values_in_range(range) - 1;
583 if (all_sels + sel_indexes >= selector) {
584 selector -= all_sels;
586 * As we see here, pickable ranges work only as
587 * long as the first selector for each pickable
588 * range is 0, and the each subsequent range for
589 * this 'pick' follow immediately at next unused
590 * selector (Eg. there is no gaps between ranges).
591 * I think this is fine but it probably should be
592 * documented. OTOH, whole pickable range stuff
593 * might benefit from some documentation
595 return range->min + (range->step * selector);
598 all_sels += (sel_indexes + 1);
603 EXPORT_SYMBOL_GPL(regulator_list_voltage_pickable_linear_range);
606 * regulator_desc_list_voltage_linear_range - List voltages for linear ranges
608 * @desc: Regulator desc for regulator which volatges are to be listed
609 * @selector: Selector to convert into a voltage
611 * Regulators with a series of simple linear mappings between voltages
612 * and selectors who have set linear_ranges in the regulator descriptor
613 * can use this function prior regulator registration to list voltages.
614 * This is useful when voltages need to be listed during device-tree
617 int regulator_desc_list_voltage_linear_range(const struct regulator_desc *desc,
618 unsigned int selector)
623 BUG_ON(!desc->n_linear_ranges);
625 ret = linear_range_get_value_array(desc->linear_ranges,
626 desc->n_linear_ranges, selector,
633 EXPORT_SYMBOL_GPL(regulator_desc_list_voltage_linear_range);
636 * regulator_list_voltage_linear_range - List voltages for linear ranges
638 * @rdev: Regulator device
639 * @selector: Selector to convert into a voltage
641 * Regulators with a series of simple linear mappings between voltages
642 * and selectors can set linear_ranges in the regulator descriptor and
643 * then use this function as their list_voltage() operation,
645 int regulator_list_voltage_linear_range(struct regulator_dev *rdev,
646 unsigned int selector)
648 return regulator_desc_list_voltage_linear_range(rdev->desc, selector);
650 EXPORT_SYMBOL_GPL(regulator_list_voltage_linear_range);
653 * regulator_list_voltage_table - List voltages with table based mapping
655 * @rdev: Regulator device
656 * @selector: Selector to convert into a voltage
658 * Regulators with table based mapping between voltages and
659 * selectors can set volt_table in the regulator descriptor
660 * and then use this function as their list_voltage() operation.
662 int regulator_list_voltage_table(struct regulator_dev *rdev,
663 unsigned int selector)
665 if (!rdev->desc->volt_table) {
666 BUG_ON(!rdev->desc->volt_table);
670 if (selector >= rdev->desc->n_voltages)
672 if (selector < rdev->desc->linear_min_sel)
675 return rdev->desc->volt_table[selector];
677 EXPORT_SYMBOL_GPL(regulator_list_voltage_table);
680 * regulator_set_bypass_regmap - Default set_bypass() using regmap
682 * @rdev: device to operate on.
683 * @enable: state to set.
685 int regulator_set_bypass_regmap(struct regulator_dev *rdev, bool enable)
690 val = rdev->desc->bypass_val_on;
692 val = rdev->desc->bypass_mask;
694 val = rdev->desc->bypass_val_off;
697 return regmap_update_bits(rdev->regmap, rdev->desc->bypass_reg,
698 rdev->desc->bypass_mask, val);
700 EXPORT_SYMBOL_GPL(regulator_set_bypass_regmap);
703 * regulator_set_soft_start_regmap - Default set_soft_start() using regmap
705 * @rdev: device to operate on.
707 int regulator_set_soft_start_regmap(struct regulator_dev *rdev)
711 val = rdev->desc->soft_start_val_on;
713 val = rdev->desc->soft_start_mask;
715 return regmap_update_bits(rdev->regmap, rdev->desc->soft_start_reg,
716 rdev->desc->soft_start_mask, val);
718 EXPORT_SYMBOL_GPL(regulator_set_soft_start_regmap);
721 * regulator_set_pull_down_regmap - Default set_pull_down() using regmap
723 * @rdev: device to operate on.
725 int regulator_set_pull_down_regmap(struct regulator_dev *rdev)
729 val = rdev->desc->pull_down_val_on;
731 val = rdev->desc->pull_down_mask;
733 return regmap_update_bits(rdev->regmap, rdev->desc->pull_down_reg,
734 rdev->desc->pull_down_mask, val);
736 EXPORT_SYMBOL_GPL(regulator_set_pull_down_regmap);
739 * regulator_get_bypass_regmap - Default get_bypass() using regmap
741 * @rdev: device to operate on.
742 * @enable: current state.
744 int regulator_get_bypass_regmap(struct regulator_dev *rdev, bool *enable)
747 unsigned int val_on = rdev->desc->bypass_val_on;
750 ret = regmap_read(rdev->regmap, rdev->desc->bypass_reg, &val);
755 val_on = rdev->desc->bypass_mask;
757 *enable = (val & rdev->desc->bypass_mask) == val_on;
761 EXPORT_SYMBOL_GPL(regulator_get_bypass_regmap);
764 * regulator_set_active_discharge_regmap - Default set_active_discharge()
767 * @rdev: device to operate on.
768 * @enable: state to set, 0 to disable and 1 to enable.
770 int regulator_set_active_discharge_regmap(struct regulator_dev *rdev,
776 val = rdev->desc->active_discharge_on;
778 val = rdev->desc->active_discharge_off;
780 return regmap_update_bits(rdev->regmap,
781 rdev->desc->active_discharge_reg,
782 rdev->desc->active_discharge_mask, val);
784 EXPORT_SYMBOL_GPL(regulator_set_active_discharge_regmap);
787 * regulator_set_current_limit_regmap - set_current_limit for regmap users
789 * @rdev: regulator to operate on
790 * @min_uA: Lower bound for current limit
791 * @max_uA: Upper bound for current limit
793 * Regulators that use regmap for their register I/O can set curr_table,
794 * csel_reg and csel_mask fields in their descriptor and then use this
795 * as their set_current_limit operation, saving some code.
797 int regulator_set_current_limit_regmap(struct regulator_dev *rdev,
798 int min_uA, int max_uA)
800 unsigned int n_currents = rdev->desc->n_current_limits;
806 if (rdev->desc->curr_table) {
807 const unsigned int *curr_table = rdev->desc->curr_table;
808 bool ascend = curr_table[n_currents - 1] > curr_table[0];
810 /* search for closest to maximum */
812 for (i = n_currents - 1; i >= 0; i--) {
813 if (min_uA <= curr_table[i] &&
814 curr_table[i] <= max_uA) {
820 for (i = 0; i < n_currents; i++) {
821 if (min_uA <= curr_table[i] &&
822 curr_table[i] <= max_uA) {
833 sel <<= ffs(rdev->desc->csel_mask) - 1;
835 return regmap_update_bits(rdev->regmap, rdev->desc->csel_reg,
836 rdev->desc->csel_mask, sel);
838 EXPORT_SYMBOL_GPL(regulator_set_current_limit_regmap);
841 * regulator_get_current_limit_regmap - get_current_limit for regmap users
843 * @rdev: regulator to operate on
845 * Regulators that use regmap for their register I/O can set the
846 * csel_reg and csel_mask fields in their descriptor and then use this
847 * as their get_current_limit operation, saving some code.
849 int regulator_get_current_limit_regmap(struct regulator_dev *rdev)
854 ret = regmap_read(rdev->regmap, rdev->desc->csel_reg, &val);
858 val &= rdev->desc->csel_mask;
859 val >>= ffs(rdev->desc->csel_mask) - 1;
861 if (rdev->desc->curr_table) {
862 if (val >= rdev->desc->n_current_limits)
865 return rdev->desc->curr_table[val];
870 EXPORT_SYMBOL_GPL(regulator_get_current_limit_regmap);
873 * regulator_bulk_set_supply_names - initialize the 'supply' fields in an array
874 * of regulator_bulk_data structs
876 * @consumers: array of regulator_bulk_data entries to initialize
877 * @supply_names: array of supply name strings
878 * @num_supplies: number of supply names to initialize
880 * Note: the 'consumers' array must be the size of 'num_supplies'.
882 void regulator_bulk_set_supply_names(struct regulator_bulk_data *consumers,
883 const char *const *supply_names,
884 unsigned int num_supplies)
888 for (i = 0; i < num_supplies; i++)
889 consumers[i].supply = supply_names[i];
891 EXPORT_SYMBOL_GPL(regulator_bulk_set_supply_names);
894 * regulator_is_equal - test whether two regulators are the same
896 * @reg1: first regulator to operate on
897 * @reg2: second regulator to operate on
899 bool regulator_is_equal(struct regulator *reg1, struct regulator *reg2)
901 return reg1->rdev == reg2->rdev;
903 EXPORT_SYMBOL_GPL(regulator_is_equal);
905 static int find_closest_bigger(unsigned int target, const unsigned int *table,
906 unsigned int num_sel, unsigned int *sel)
908 unsigned int s, tmp, max, maxsel = 0;
913 for (s = 0; s < num_sel; s++) {
914 if (table[s] > max) {
918 if (table[s] >= target) {
919 if (!found || table[s] - target < tmp - target) {
938 * regulator_set_ramp_delay_regmap - set_ramp_delay() helper
940 * @rdev: regulator to operate on
942 * Regulators that use regmap for their register I/O can set the ramp_reg
943 * and ramp_mask fields in their descriptor and then use this as their
944 * set_ramp_delay operation, saving some code.
946 int regulator_set_ramp_delay_regmap(struct regulator_dev *rdev, int ramp_delay)
951 if (WARN_ON(!rdev->desc->n_ramp_values || !rdev->desc->ramp_delay_table))
954 ret = find_closest_bigger(ramp_delay, rdev->desc->ramp_delay_table,
955 rdev->desc->n_ramp_values, &sel);
958 dev_warn(rdev_get_dev(rdev),
959 "Can't set ramp-delay %u, setting %u\n", ramp_delay,
960 rdev->desc->ramp_delay_table[sel]);
963 sel <<= ffs(rdev->desc->ramp_mask) - 1;
965 return regmap_update_bits(rdev->regmap, rdev->desc->ramp_reg,
966 rdev->desc->ramp_mask, sel);
968 EXPORT_SYMBOL_GPL(regulator_set_ramp_delay_regmap);