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- // SPDX-License-Identifier: GPL-2.0-or-later
- //
- // helpers.c -- Voltage/Current Regulator framework helper functions.
- //
- // Copyright 2007, 2008 Wolfson Microelectronics PLC.
- // Copyright 2008 SlimLogic Ltd.
- #include <linux/kernel.h>
- #include <linux/err.h>
- #include <linux/delay.h>
- #include <linux/regmap.h>
- #include <linux/regulator/consumer.h>
- #include <linux/regulator/driver.h>
- #include <linux/module.h>
- #include "internal.h"
- /**
- * regulator_is_enabled_regmap - standard is_enabled() for regmap users
- *
- * @rdev: regulator to operate on
- *
- * Regulators that use regmap for their register I/O can set the
- * enable_reg and enable_mask fields in their descriptor and then use
- * this as their is_enabled operation, saving some code.
- */
- int regulator_is_enabled_regmap(struct regulator_dev *rdev)
- {
- unsigned int val;
- int ret;
- ret = regmap_read(rdev->regmap, rdev->desc->enable_reg, &val);
- if (ret != 0)
- return ret;
- val &= rdev->desc->enable_mask;
- if (rdev->desc->enable_is_inverted) {
- if (rdev->desc->enable_val)
- return val != rdev->desc->enable_val;
- return val == 0;
- } else {
- if (rdev->desc->enable_val)
- return val == rdev->desc->enable_val;
- return val != 0;
- }
- }
- EXPORT_SYMBOL_GPL(regulator_is_enabled_regmap);
- /**
- * regulator_enable_regmap - standard enable() for regmap users
- *
- * @rdev: regulator to operate on
- *
- * Regulators that use regmap for their register I/O can set the
- * enable_reg and enable_mask fields in their descriptor and then use
- * this as their enable() operation, saving some code.
- */
- int regulator_enable_regmap(struct regulator_dev *rdev)
- {
- unsigned int val;
- if (rdev->desc->enable_is_inverted) {
- val = rdev->desc->disable_val;
- } else {
- val = rdev->desc->enable_val;
- if (!val)
- val = rdev->desc->enable_mask;
- }
- return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
- rdev->desc->enable_mask, val);
- }
- EXPORT_SYMBOL_GPL(regulator_enable_regmap);
- /**
- * regulator_disable_regmap - standard disable() for regmap users
- *
- * @rdev: regulator to operate on
- *
- * Regulators that use regmap for their register I/O can set the
- * enable_reg and enable_mask fields in their descriptor and then use
- * this as their disable() operation, saving some code.
- */
- int regulator_disable_regmap(struct regulator_dev *rdev)
- {
- unsigned int val;
- if (rdev->desc->enable_is_inverted) {
- val = rdev->desc->enable_val;
- if (!val)
- val = rdev->desc->enable_mask;
- } else {
- val = rdev->desc->disable_val;
- }
- return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
- rdev->desc->enable_mask, val);
- }
- EXPORT_SYMBOL_GPL(regulator_disable_regmap);
- static int regulator_range_selector_to_index(struct regulator_dev *rdev,
- unsigned int rval)
- {
- int i;
- if (!rdev->desc->linear_range_selectors)
- return -EINVAL;
- rval &= rdev->desc->vsel_range_mask;
- for (i = 0; i < rdev->desc->n_linear_ranges; i++) {
- if (rdev->desc->linear_range_selectors[i] == rval)
- return i;
- }
- return -EINVAL;
- }
- /**
- * regulator_get_voltage_sel_pickable_regmap - pickable range get_voltage_sel
- *
- * @rdev: regulator to operate on
- *
- * Regulators that use regmap for their register I/O and use pickable
- * ranges can set the vsel_reg, vsel_mask, vsel_range_reg and vsel_range_mask
- * fields in their descriptor and then use this as their get_voltage_vsel
- * operation, saving some code.
- */
- int regulator_get_voltage_sel_pickable_regmap(struct regulator_dev *rdev)
- {
- unsigned int r_val;
- int range;
- unsigned int val;
- int ret, i;
- unsigned int voltages_in_range = 0;
- if (!rdev->desc->linear_ranges)
- return -EINVAL;
- ret = regmap_read(rdev->regmap, rdev->desc->vsel_reg, &val);
- if (ret != 0)
- return ret;
- ret = regmap_read(rdev->regmap, rdev->desc->vsel_range_reg, &r_val);
- if (ret != 0)
- return ret;
- val &= rdev->desc->vsel_mask;
- val >>= ffs(rdev->desc->vsel_mask) - 1;
- range = regulator_range_selector_to_index(rdev, r_val);
- if (range < 0)
- return -EINVAL;
- for (i = 0; i < range; i++)
- voltages_in_range += (rdev->desc->linear_ranges[i].max_sel -
- rdev->desc->linear_ranges[i].min_sel) + 1;
- return val + voltages_in_range;
- }
- EXPORT_SYMBOL_GPL(regulator_get_voltage_sel_pickable_regmap);
- /**
- * regulator_set_voltage_sel_pickable_regmap - pickable range set_voltage_sel
- *
- * @rdev: regulator to operate on
- * @sel: Selector to set
- *
- * Regulators that use regmap for their register I/O and use pickable
- * ranges can set the vsel_reg, vsel_mask, vsel_range_reg and vsel_range_mask
- * fields in their descriptor and then use this as their set_voltage_vsel
- * operation, saving some code.
- */
- int regulator_set_voltage_sel_pickable_regmap(struct regulator_dev *rdev,
- unsigned int sel)
- {
- unsigned int range;
- int ret, i;
- unsigned int voltages_in_range = 0;
- for (i = 0; i < rdev->desc->n_linear_ranges; i++) {
- voltages_in_range = (rdev->desc->linear_ranges[i].max_sel -
- rdev->desc->linear_ranges[i].min_sel) + 1;
- if (sel < voltages_in_range)
- break;
- sel -= voltages_in_range;
- }
- if (i == rdev->desc->n_linear_ranges)
- return -EINVAL;
- sel <<= ffs(rdev->desc->vsel_mask) - 1;
- sel += rdev->desc->linear_ranges[i].min_sel;
- range = rdev->desc->linear_range_selectors[i];
- if (rdev->desc->vsel_reg == rdev->desc->vsel_range_reg) {
- ret = regmap_update_bits(rdev->regmap,
- rdev->desc->vsel_reg,
- rdev->desc->vsel_range_mask |
- rdev->desc->vsel_mask, sel | range);
- } else {
- ret = regmap_update_bits(rdev->regmap,
- rdev->desc->vsel_range_reg,
- rdev->desc->vsel_range_mask, range);
- if (ret)
- return ret;
- ret = regmap_update_bits(rdev->regmap, rdev->desc->vsel_reg,
- rdev->desc->vsel_mask, sel);
- }
- if (ret)
- return ret;
- if (rdev->desc->apply_bit)
- ret = regmap_update_bits(rdev->regmap, rdev->desc->apply_reg,
- rdev->desc->apply_bit,
- rdev->desc->apply_bit);
- return ret;
- }
- EXPORT_SYMBOL_GPL(regulator_set_voltage_sel_pickable_regmap);
- /**
- * regulator_get_voltage_sel_regmap - standard get_voltage_sel for regmap users
- *
- * @rdev: regulator to operate on
- *
- * Regulators that use regmap for their register I/O can set the
- * vsel_reg and vsel_mask fields in their descriptor and then use this
- * as their get_voltage_vsel operation, saving some code.
- */
- int regulator_get_voltage_sel_regmap(struct regulator_dev *rdev)
- {
- unsigned int val;
- int ret;
- ret = regmap_read(rdev->regmap, rdev->desc->vsel_reg, &val);
- if (ret != 0)
- return ret;
- val &= rdev->desc->vsel_mask;
- val >>= ffs(rdev->desc->vsel_mask) - 1;
- return val;
- }
- EXPORT_SYMBOL_GPL(regulator_get_voltage_sel_regmap);
- /**
- * regulator_set_voltage_sel_regmap - standard set_voltage_sel for regmap users
- *
- * @rdev: regulator to operate on
- * @sel: Selector to set
- *
- * Regulators that use regmap for their register I/O can set the
- * vsel_reg and vsel_mask fields in their descriptor and then use this
- * as their set_voltage_vsel operation, saving some code.
- */
- int regulator_set_voltage_sel_regmap(struct regulator_dev *rdev, unsigned sel)
- {
- int ret;
- sel <<= ffs(rdev->desc->vsel_mask) - 1;
- ret = regmap_update_bits(rdev->regmap, rdev->desc->vsel_reg,
- rdev->desc->vsel_mask, sel);
- if (ret)
- return ret;
- if (rdev->desc->apply_bit)
- ret = regmap_update_bits(rdev->regmap, rdev->desc->apply_reg,
- rdev->desc->apply_bit,
- rdev->desc->apply_bit);
- return ret;
- }
- EXPORT_SYMBOL_GPL(regulator_set_voltage_sel_regmap);
- /**
- * regulator_map_voltage_iterate - map_voltage() based on list_voltage()
- *
- * @rdev: Regulator to operate on
- * @min_uV: Lower bound for voltage
- * @max_uV: Upper bound for voltage
- *
- * Drivers implementing set_voltage_sel() and list_voltage() can use
- * this as their map_voltage() operation. It will find a suitable
- * voltage by calling list_voltage() until it gets something in bounds
- * for the requested voltages.
- */
- int regulator_map_voltage_iterate(struct regulator_dev *rdev,
- int min_uV, int max_uV)
- {
- int best_val = INT_MAX;
- int selector = 0;
- int i, ret;
- /* Find the smallest voltage that falls within the specified
- * range.
- */
- for (i = 0; i < rdev->desc->n_voltages; i++) {
- ret = rdev->desc->ops->list_voltage(rdev, i);
- if (ret < 0)
- continue;
- if (ret < best_val && ret >= min_uV && ret <= max_uV) {
- best_val = ret;
- selector = i;
- }
- }
- if (best_val != INT_MAX)
- return selector;
- else
- return -EINVAL;
- }
- EXPORT_SYMBOL_GPL(regulator_map_voltage_iterate);
- /**
- * regulator_map_voltage_ascend - map_voltage() for ascendant voltage list
- *
- * @rdev: Regulator to operate on
- * @min_uV: Lower bound for voltage
- * @max_uV: Upper bound for voltage
- *
- * Drivers that have ascendant voltage list can use this as their
- * map_voltage() operation.
- */
- int regulator_map_voltage_ascend(struct regulator_dev *rdev,
- int min_uV, int max_uV)
- {
- int i, ret;
- for (i = 0; i < rdev->desc->n_voltages; i++) {
- ret = rdev->desc->ops->list_voltage(rdev, i);
- if (ret < 0)
- continue;
- if (ret > max_uV)
- break;
- if (ret >= min_uV && ret <= max_uV)
- return i;
- }
- return -EINVAL;
- }
- EXPORT_SYMBOL_GPL(regulator_map_voltage_ascend);
- /**
- * regulator_map_voltage_linear - map_voltage() for simple linear mappings
- *
- * @rdev: Regulator to operate on
- * @min_uV: Lower bound for voltage
- * @max_uV: Upper bound for voltage
- *
- * Drivers providing min_uV and uV_step in their regulator_desc can
- * use this as their map_voltage() operation.
- */
- int regulator_map_voltage_linear(struct regulator_dev *rdev,
- int min_uV, int max_uV)
- {
- int ret, voltage;
- /* Allow uV_step to be 0 for fixed voltage */
- if (rdev->desc->n_voltages == 1 && rdev->desc->uV_step == 0) {
- if (min_uV <= rdev->desc->min_uV && rdev->desc->min_uV <= max_uV)
- return 0;
- else
- return -EINVAL;
- }
- if (!rdev->desc->uV_step) {
- BUG_ON(!rdev->desc->uV_step);
- return -EINVAL;
- }
- if (min_uV < rdev->desc->min_uV)
- min_uV = rdev->desc->min_uV;
- ret = DIV_ROUND_UP(min_uV - rdev->desc->min_uV, rdev->desc->uV_step);
- if (ret < 0)
- return ret;
- ret += rdev->desc->linear_min_sel;
- /* Map back into a voltage to verify we're still in bounds */
- voltage = rdev->desc->ops->list_voltage(rdev, ret);
- if (voltage < min_uV || voltage > max_uV)
- return -EINVAL;
- return ret;
- }
- EXPORT_SYMBOL_GPL(regulator_map_voltage_linear);
- /**
- * regulator_map_voltage_linear_range - map_voltage() for multiple linear ranges
- *
- * @rdev: Regulator to operate on
- * @min_uV: Lower bound for voltage
- * @max_uV: Upper bound for voltage
- *
- * Drivers providing linear_ranges in their descriptor can use this as
- * their map_voltage() callback.
- */
- int regulator_map_voltage_linear_range(struct regulator_dev *rdev,
- int min_uV, int max_uV)
- {
- const struct regulator_linear_range *range;
- int ret = -EINVAL;
- int voltage, i;
- if (!rdev->desc->n_linear_ranges) {
- BUG_ON(!rdev->desc->n_linear_ranges);
- return -EINVAL;
- }
- for (i = 0; i < rdev->desc->n_linear_ranges; i++) {
- int linear_max_uV;
- range = &rdev->desc->linear_ranges[i];
- linear_max_uV = range->min_uV +
- (range->max_sel - range->min_sel) * range->uV_step;
- if (!(min_uV <= linear_max_uV && max_uV >= range->min_uV))
- continue;
- if (min_uV <= range->min_uV)
- min_uV = range->min_uV;
- /* range->uV_step == 0 means fixed voltage range */
- if (range->uV_step == 0) {
- ret = 0;
- } else {
- ret = DIV_ROUND_UP(min_uV - range->min_uV,
- range->uV_step);
- if (ret < 0)
- return ret;
- }
- ret += range->min_sel;
- /*
- * Map back into a voltage to verify we're still in bounds.
- * If we are not, then continue checking rest of the ranges.
- */
- voltage = rdev->desc->ops->list_voltage(rdev, ret);
- if (voltage >= min_uV && voltage <= max_uV)
- break;
- }
- if (i == rdev->desc->n_linear_ranges)
- return -EINVAL;
- return ret;
- }
- EXPORT_SYMBOL_GPL(regulator_map_voltage_linear_range);
- /**
- * regulator_map_voltage_pickable_linear_range - map_voltage, pickable ranges
- *
- * @rdev: Regulator to operate on
- * @min_uV: Lower bound for voltage
- * @max_uV: Upper bound for voltage
- *
- * Drivers providing pickable linear_ranges in their descriptor can use
- * this as their map_voltage() callback.
- */
- int regulator_map_voltage_pickable_linear_range(struct regulator_dev *rdev,
- int min_uV, int max_uV)
- {
- const struct regulator_linear_range *range;
- int ret = -EINVAL;
- int voltage, i;
- unsigned int selector = 0;
- if (!rdev->desc->n_linear_ranges) {
- BUG_ON(!rdev->desc->n_linear_ranges);
- return -EINVAL;
- }
- for (i = 0; i < rdev->desc->n_linear_ranges; i++) {
- int linear_max_uV;
- range = &rdev->desc->linear_ranges[i];
- linear_max_uV = range->min_uV +
- (range->max_sel - range->min_sel) * range->uV_step;
- if (!(min_uV <= linear_max_uV && max_uV >= range->min_uV)) {
- selector += (range->max_sel - range->min_sel + 1);
- continue;
- }
- if (min_uV <= range->min_uV)
- min_uV = range->min_uV;
- /* range->uV_step == 0 means fixed voltage range */
- if (range->uV_step == 0) {
- ret = 0;
- } else {
- ret = DIV_ROUND_UP(min_uV - range->min_uV,
- range->uV_step);
- if (ret < 0)
- return ret;
- }
- ret += selector;
- voltage = rdev->desc->ops->list_voltage(rdev, ret);
- /*
- * Map back into a voltage to verify we're still in bounds.
- * We may have overlapping voltage ranges. Hence we don't
- * exit but retry until we have checked all ranges.
- */
- if (voltage < min_uV || voltage > max_uV)
- selector += (range->max_sel - range->min_sel + 1);
- else
- break;
- }
- if (i == rdev->desc->n_linear_ranges)
- return -EINVAL;
- return ret;
- }
- EXPORT_SYMBOL_GPL(regulator_map_voltage_pickable_linear_range);
- /**
- * regulator_list_voltage_linear - List voltages with simple calculation
- *
- * @rdev: Regulator device
- * @selector: Selector to convert into a voltage
- *
- * Regulators with a simple linear mapping between voltages and
- * selectors can set min_uV and uV_step in the regulator descriptor
- * and then use this function as their list_voltage() operation,
- */
- int regulator_list_voltage_linear(struct regulator_dev *rdev,
- unsigned int selector)
- {
- if (selector >= rdev->desc->n_voltages)
- return -EINVAL;
- if (selector < rdev->desc->linear_min_sel)
- return 0;
- selector -= rdev->desc->linear_min_sel;
- return rdev->desc->min_uV + (rdev->desc->uV_step * selector);
- }
- EXPORT_SYMBOL_GPL(regulator_list_voltage_linear);
- /**
- * regulator_list_voltage_pickable_linear_range - pickable range list voltages
- *
- * @rdev: Regulator device
- * @selector: Selector to convert into a voltage
- *
- * list_voltage() operation, intended to be used by drivers utilizing pickable
- * ranges helpers.
- */
- int regulator_list_voltage_pickable_linear_range(struct regulator_dev *rdev,
- unsigned int selector)
- {
- const struct regulator_linear_range *range;
- int i;
- unsigned int all_sels = 0;
- if (!rdev->desc->n_linear_ranges) {
- BUG_ON(!rdev->desc->n_linear_ranges);
- return -EINVAL;
- }
- for (i = 0; i < rdev->desc->n_linear_ranges; i++) {
- unsigned int sels_in_range;
- range = &rdev->desc->linear_ranges[i];
- sels_in_range = range->max_sel - range->min_sel;
- if (all_sels + sels_in_range >= selector) {
- selector -= all_sels;
- return range->min_uV + (range->uV_step * selector);
- }
- all_sels += (sels_in_range + 1);
- }
- return -EINVAL;
- }
- EXPORT_SYMBOL_GPL(regulator_list_voltage_pickable_linear_range);
- /**
- * regulator_desc_list_voltage_linear_range - List voltages for linear ranges
- *
- * @desc: Regulator desc for regulator which volatges are to be listed
- * @selector: Selector to convert into a voltage
- *
- * Regulators with a series of simple linear mappings between voltages
- * and selectors who have set linear_ranges in the regulator descriptor
- * can use this function prior regulator registration to list voltages.
- * This is useful when voltages need to be listed during device-tree
- * parsing.
- */
- int regulator_desc_list_voltage_linear_range(const struct regulator_desc *desc,
- unsigned int selector)
- {
- const struct regulator_linear_range *range;
- int i;
- if (!desc->n_linear_ranges) {
- BUG_ON(!desc->n_linear_ranges);
- return -EINVAL;
- }
- for (i = 0; i < desc->n_linear_ranges; i++) {
- range = &desc->linear_ranges[i];
- if (!(selector >= range->min_sel &&
- selector <= range->max_sel))
- continue;
- selector -= range->min_sel;
- return range->min_uV + (range->uV_step * selector);
- }
- return -EINVAL;
- }
- EXPORT_SYMBOL_GPL(regulator_desc_list_voltage_linear_range);
- /**
- * regulator_list_voltage_linear_range - List voltages for linear ranges
- *
- * @rdev: Regulator device
- * @selector: Selector to convert into a voltage
- *
- * Regulators with a series of simple linear mappings between voltages
- * and selectors can set linear_ranges in the regulator descriptor and
- * then use this function as their list_voltage() operation,
- */
- int regulator_list_voltage_linear_range(struct regulator_dev *rdev,
- unsigned int selector)
- {
- return regulator_desc_list_voltage_linear_range(rdev->desc, selector);
- }
- EXPORT_SYMBOL_GPL(regulator_list_voltage_linear_range);
- /**
- * regulator_list_voltage_table - List voltages with table based mapping
- *
- * @rdev: Regulator device
- * @selector: Selector to convert into a voltage
- *
- * Regulators with table based mapping between voltages and
- * selectors can set volt_table in the regulator descriptor
- * and then use this function as their list_voltage() operation.
- */
- int regulator_list_voltage_table(struct regulator_dev *rdev,
- unsigned int selector)
- {
- if (!rdev->desc->volt_table) {
- BUG_ON(!rdev->desc->volt_table);
- return -EINVAL;
- }
- if (selector >= rdev->desc->n_voltages)
- return -EINVAL;
- return rdev->desc->volt_table[selector];
- }
- EXPORT_SYMBOL_GPL(regulator_list_voltage_table);
- /**
- * regulator_set_bypass_regmap - Default set_bypass() using regmap
- *
- * @rdev: device to operate on.
- * @enable: state to set.
- */
- int regulator_set_bypass_regmap(struct regulator_dev *rdev, bool enable)
- {
- unsigned int val;
- if (enable) {
- val = rdev->desc->bypass_val_on;
- if (!val)
- val = rdev->desc->bypass_mask;
- } else {
- val = rdev->desc->bypass_val_off;
- }
- return regmap_update_bits(rdev->regmap, rdev->desc->bypass_reg,
- rdev->desc->bypass_mask, val);
- }
- EXPORT_SYMBOL_GPL(regulator_set_bypass_regmap);
- /**
- * regulator_set_soft_start_regmap - Default set_soft_start() using regmap
- *
- * @rdev: device to operate on.
- */
- int regulator_set_soft_start_regmap(struct regulator_dev *rdev)
- {
- unsigned int val;
- val = rdev->desc->soft_start_val_on;
- if (!val)
- val = rdev->desc->soft_start_mask;
- return regmap_update_bits(rdev->regmap, rdev->desc->soft_start_reg,
- rdev->desc->soft_start_mask, val);
- }
- EXPORT_SYMBOL_GPL(regulator_set_soft_start_regmap);
- /**
- * regulator_set_pull_down_regmap - Default set_pull_down() using regmap
- *
- * @rdev: device to operate on.
- */
- int regulator_set_pull_down_regmap(struct regulator_dev *rdev)
- {
- unsigned int val;
- val = rdev->desc->pull_down_val_on;
- if (!val)
- val = rdev->desc->pull_down_mask;
- return regmap_update_bits(rdev->regmap, rdev->desc->pull_down_reg,
- rdev->desc->pull_down_mask, val);
- }
- EXPORT_SYMBOL_GPL(regulator_set_pull_down_regmap);
- /**
- * regulator_get_bypass_regmap - Default get_bypass() using regmap
- *
- * @rdev: device to operate on.
- * @enable: current state.
- */
- int regulator_get_bypass_regmap(struct regulator_dev *rdev, bool *enable)
- {
- unsigned int val;
- unsigned int val_on = rdev->desc->bypass_val_on;
- int ret;
- ret = regmap_read(rdev->regmap, rdev->desc->bypass_reg, &val);
- if (ret != 0)
- return ret;
- if (!val_on)
- val_on = rdev->desc->bypass_mask;
- *enable = (val & rdev->desc->bypass_mask) == val_on;
- return 0;
- }
- EXPORT_SYMBOL_GPL(regulator_get_bypass_regmap);
- /**
- * regulator_set_active_discharge_regmap - Default set_active_discharge()
- * using regmap
- *
- * @rdev: device to operate on.
- * @enable: state to set, 0 to disable and 1 to enable.
- */
- int regulator_set_active_discharge_regmap(struct regulator_dev *rdev,
- bool enable)
- {
- unsigned int val;
- if (enable)
- val = rdev->desc->active_discharge_on;
- else
- val = rdev->desc->active_discharge_off;
- return regmap_update_bits(rdev->regmap,
- rdev->desc->active_discharge_reg,
- rdev->desc->active_discharge_mask, val);
- }
- EXPORT_SYMBOL_GPL(regulator_set_active_discharge_regmap);
- /**
- * regulator_set_current_limit_regmap - set_current_limit for regmap users
- *
- * @rdev: regulator to operate on
- * @min_uA: Lower bound for current limit
- * @max_uA: Upper bound for current limit
- *
- * Regulators that use regmap for their register I/O can set curr_table,
- * csel_reg and csel_mask fields in their descriptor and then use this
- * as their set_current_limit operation, saving some code.
- */
- int regulator_set_current_limit_regmap(struct regulator_dev *rdev,
- int min_uA, int max_uA)
- {
- unsigned int n_currents = rdev->desc->n_current_limits;
- int i, sel = -1;
- if (n_currents == 0)
- return -EINVAL;
- if (rdev->desc->curr_table) {
- const unsigned int *curr_table = rdev->desc->curr_table;
- bool ascend = curr_table[n_currents - 1] > curr_table[0];
- /* search for closest to maximum */
- if (ascend) {
- for (i = n_currents - 1; i >= 0; i--) {
- if (min_uA <= curr_table[i] &&
- curr_table[i] <= max_uA) {
- sel = i;
- break;
- }
- }
- } else {
- for (i = 0; i < n_currents; i++) {
- if (min_uA <= curr_table[i] &&
- curr_table[i] <= max_uA) {
- sel = i;
- break;
- }
- }
- }
- }
- if (sel < 0)
- return -EINVAL;
- sel <<= ffs(rdev->desc->csel_mask) - 1;
- return regmap_update_bits(rdev->regmap, rdev->desc->csel_reg,
- rdev->desc->csel_mask, sel);
- }
- EXPORT_SYMBOL_GPL(regulator_set_current_limit_regmap);
- /**
- * regulator_get_current_limit_regmap - get_current_limit for regmap users
- *
- * @rdev: regulator to operate on
- *
- * Regulators that use regmap for their register I/O can set the
- * csel_reg and csel_mask fields in their descriptor and then use this
- * as their get_current_limit operation, saving some code.
- */
- int regulator_get_current_limit_regmap(struct regulator_dev *rdev)
- {
- unsigned int val;
- int ret;
- ret = regmap_read(rdev->regmap, rdev->desc->csel_reg, &val);
- if (ret != 0)
- return ret;
- val &= rdev->desc->csel_mask;
- val >>= ffs(rdev->desc->csel_mask) - 1;
- if (rdev->desc->curr_table) {
- if (val >= rdev->desc->n_current_limits)
- return -EINVAL;
- return rdev->desc->curr_table[val];
- }
- return -EINVAL;
- }
- EXPORT_SYMBOL_GPL(regulator_get_current_limit_regmap);
- /**
- * regulator_bulk_set_supply_names - initialize the 'supply' fields in an array
- * of regulator_bulk_data structs
- *
- * @consumers: array of regulator_bulk_data entries to initialize
- * @supply_names: array of supply name strings
- * @num_supplies: number of supply names to initialize
- *
- * Note: the 'consumers' array must be the size of 'num_supplies'.
- */
- void regulator_bulk_set_supply_names(struct regulator_bulk_data *consumers,
- const char *const *supply_names,
- unsigned int num_supplies)
- {
- unsigned int i;
- for (i = 0; i < num_supplies; i++)
- consumers[i].supply = supply_names[i];
- }
- EXPORT_SYMBOL_GPL(regulator_bulk_set_supply_names);
- /**
- * regulator_is_equal - test whether two regulators are the same
- *
- * @reg1: first regulator to operate on
- * @reg2: second regulator to operate on
- */
- bool regulator_is_equal(struct regulator *reg1, struct regulator *reg2)
- {
- return reg1->rdev == reg2->rdev;
- }
- EXPORT_SYMBOL_GPL(regulator_is_equal);
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