969 lines
25 KiB
C
969 lines
25 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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//
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// helpers.c -- Voltage/Current Regulator framework helper functions.
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//
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// Copyright 2007, 2008 Wolfson Microelectronics PLC.
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// Copyright 2008 SlimLogic Ltd.
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#include <linux/kernel.h>
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#include <linux/err.h>
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#include <linux/delay.h>
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#include <linux/regmap.h>
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#include <linux/regulator/consumer.h>
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#include <linux/regulator/driver.h>
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#include <linux/module.h>
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#include "internal.h"
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/**
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* regulator_is_enabled_regmap - standard is_enabled() for regmap users
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*
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* @rdev: regulator to operate on
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*
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* Regulators that use regmap for their register I/O can set the
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* enable_reg and enable_mask fields in their descriptor and then use
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* this as their is_enabled operation, saving some code.
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*/
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int regulator_is_enabled_regmap(struct regulator_dev *rdev)
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{
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unsigned int val;
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int ret;
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ret = regmap_read(rdev->regmap, rdev->desc->enable_reg, &val);
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if (ret != 0)
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return ret;
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val &= rdev->desc->enable_mask;
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if (rdev->desc->enable_is_inverted) {
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if (rdev->desc->enable_val)
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return val != rdev->desc->enable_val;
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return val == 0;
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} else {
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if (rdev->desc->enable_val)
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return val == rdev->desc->enable_val;
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return val != 0;
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}
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}
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EXPORT_SYMBOL_GPL(regulator_is_enabled_regmap);
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/**
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* regulator_enable_regmap - standard enable() for regmap users
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*
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* @rdev: regulator to operate on
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*
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* Regulators that use regmap for their register I/O can set the
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* enable_reg and enable_mask fields in their descriptor and then use
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* this as their enable() operation, saving some code.
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*/
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int regulator_enable_regmap(struct regulator_dev *rdev)
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{
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unsigned int val;
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if (rdev->desc->enable_is_inverted) {
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val = rdev->desc->disable_val;
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} else {
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val = rdev->desc->enable_val;
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if (!val)
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val = rdev->desc->enable_mask;
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}
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return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
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rdev->desc->enable_mask, val);
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}
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EXPORT_SYMBOL_GPL(regulator_enable_regmap);
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/**
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* regulator_disable_regmap - standard disable() for regmap users
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*
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* @rdev: regulator to operate on
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*
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* Regulators that use regmap for their register I/O can set the
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* enable_reg and enable_mask fields in their descriptor and then use
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* this as their disable() operation, saving some code.
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*/
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int regulator_disable_regmap(struct regulator_dev *rdev)
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{
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unsigned int val;
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if (rdev->desc->enable_is_inverted) {
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val = rdev->desc->enable_val;
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if (!val)
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val = rdev->desc->enable_mask;
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} else {
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val = rdev->desc->disable_val;
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}
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return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
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rdev->desc->enable_mask, val);
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}
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EXPORT_SYMBOL_GPL(regulator_disable_regmap);
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static int regulator_range_selector_to_index(struct regulator_dev *rdev,
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unsigned int rval)
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{
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int i;
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if (!rdev->desc->linear_range_selectors)
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return -EINVAL;
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rval &= rdev->desc->vsel_range_mask;
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for (i = 0; i < rdev->desc->n_linear_ranges; i++) {
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if (rdev->desc->linear_range_selectors[i] == rval)
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return i;
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}
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return -EINVAL;
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}
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/**
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* regulator_get_voltage_sel_pickable_regmap - pickable range get_voltage_sel
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*
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* @rdev: regulator to operate on
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*
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* Regulators that use regmap for their register I/O and use pickable
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* ranges can set the vsel_reg, vsel_mask, vsel_range_reg and vsel_range_mask
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* fields in their descriptor and then use this as their get_voltage_vsel
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* operation, saving some code.
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*/
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int regulator_get_voltage_sel_pickable_regmap(struct regulator_dev *rdev)
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{
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unsigned int r_val;
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int range;
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unsigned int val;
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int ret;
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unsigned int voltages = 0;
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const struct linear_range *r = rdev->desc->linear_ranges;
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if (!r)
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return -EINVAL;
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ret = regmap_read(rdev->regmap, rdev->desc->vsel_reg, &val);
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if (ret != 0)
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return ret;
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ret = regmap_read(rdev->regmap, rdev->desc->vsel_range_reg, &r_val);
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if (ret != 0)
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return ret;
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val &= rdev->desc->vsel_mask;
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val >>= ffs(rdev->desc->vsel_mask) - 1;
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range = regulator_range_selector_to_index(rdev, r_val);
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if (range < 0)
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return -EINVAL;
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voltages = linear_range_values_in_range_array(r, range);
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return val + voltages;
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}
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EXPORT_SYMBOL_GPL(regulator_get_voltage_sel_pickable_regmap);
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/**
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* regulator_set_voltage_sel_pickable_regmap - pickable range set_voltage_sel
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*
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* @rdev: regulator to operate on
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* @sel: Selector to set
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*
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* Regulators that use regmap for their register I/O and use pickable
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* ranges can set the vsel_reg, vsel_mask, vsel_range_reg and vsel_range_mask
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* fields in their descriptor and then use this as their set_voltage_vsel
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* operation, saving some code.
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*/
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int regulator_set_voltage_sel_pickable_regmap(struct regulator_dev *rdev,
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unsigned int sel)
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{
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unsigned int range;
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int ret, i;
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unsigned int voltages_in_range = 0;
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for (i = 0; i < rdev->desc->n_linear_ranges; i++) {
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const struct linear_range *r;
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r = &rdev->desc->linear_ranges[i];
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voltages_in_range = linear_range_values_in_range(r);
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if (sel < voltages_in_range)
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break;
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sel -= voltages_in_range;
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}
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if (i == rdev->desc->n_linear_ranges)
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return -EINVAL;
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sel <<= ffs(rdev->desc->vsel_mask) - 1;
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sel += rdev->desc->linear_ranges[i].min_sel;
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range = rdev->desc->linear_range_selectors[i];
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if (rdev->desc->vsel_reg == rdev->desc->vsel_range_reg) {
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ret = regmap_update_bits(rdev->regmap,
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rdev->desc->vsel_reg,
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rdev->desc->vsel_range_mask |
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rdev->desc->vsel_mask, sel | range);
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} else {
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ret = regmap_update_bits(rdev->regmap,
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rdev->desc->vsel_range_reg,
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rdev->desc->vsel_range_mask, range);
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if (ret)
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return ret;
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ret = regmap_update_bits(rdev->regmap, rdev->desc->vsel_reg,
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rdev->desc->vsel_mask, sel);
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}
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if (ret)
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return ret;
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if (rdev->desc->apply_bit)
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ret = regmap_update_bits(rdev->regmap, rdev->desc->apply_reg,
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rdev->desc->apply_bit,
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rdev->desc->apply_bit);
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return ret;
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}
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EXPORT_SYMBOL_GPL(regulator_set_voltage_sel_pickable_regmap);
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/**
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* regulator_get_voltage_sel_regmap - standard get_voltage_sel for regmap users
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*
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* @rdev: regulator to operate on
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*
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* Regulators that use regmap for their register I/O can set the
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* vsel_reg and vsel_mask fields in their descriptor and then use this
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* as their get_voltage_vsel operation, saving some code.
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*/
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int regulator_get_voltage_sel_regmap(struct regulator_dev *rdev)
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{
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unsigned int val;
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int ret;
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ret = regmap_read(rdev->regmap, rdev->desc->vsel_reg, &val);
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if (ret != 0)
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return ret;
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val &= rdev->desc->vsel_mask;
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val >>= ffs(rdev->desc->vsel_mask) - 1;
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return val;
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}
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EXPORT_SYMBOL_GPL(regulator_get_voltage_sel_regmap);
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/**
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* regulator_set_voltage_sel_regmap - standard set_voltage_sel for regmap users
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*
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* @rdev: regulator to operate on
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* @sel: Selector to set
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*
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* Regulators that use regmap for their register I/O can set the
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* vsel_reg and vsel_mask fields in their descriptor and then use this
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* as their set_voltage_vsel operation, saving some code.
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*/
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int regulator_set_voltage_sel_regmap(struct regulator_dev *rdev, unsigned sel)
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{
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int ret;
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sel <<= ffs(rdev->desc->vsel_mask) - 1;
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ret = regmap_update_bits(rdev->regmap, rdev->desc->vsel_reg,
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rdev->desc->vsel_mask, sel);
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if (ret)
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return ret;
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if (rdev->desc->apply_bit)
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ret = regmap_update_bits(rdev->regmap, rdev->desc->apply_reg,
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rdev->desc->apply_bit,
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rdev->desc->apply_bit);
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return ret;
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}
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EXPORT_SYMBOL_GPL(regulator_set_voltage_sel_regmap);
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/**
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* regulator_map_voltage_iterate - map_voltage() based on list_voltage()
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*
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* @rdev: Regulator to operate on
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* @min_uV: Lower bound for voltage
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* @max_uV: Upper bound for voltage
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*
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* Drivers implementing set_voltage_sel() and list_voltage() can use
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* this as their map_voltage() operation. It will find a suitable
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* voltage by calling list_voltage() until it gets something in bounds
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* for the requested voltages.
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*/
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int regulator_map_voltage_iterate(struct regulator_dev *rdev,
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int min_uV, int max_uV)
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{
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int best_val = INT_MAX;
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int selector = 0;
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int i, ret;
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/* Find the smallest voltage that falls within the specified
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* range.
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*/
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for (i = 0; i < rdev->desc->n_voltages; i++) {
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ret = rdev->desc->ops->list_voltage(rdev, i);
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if (ret < 0)
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continue;
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if (ret < best_val && ret >= min_uV && ret <= max_uV) {
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best_val = ret;
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selector = i;
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}
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}
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if (best_val != INT_MAX)
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return selector;
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else
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return -EINVAL;
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}
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EXPORT_SYMBOL_GPL(regulator_map_voltage_iterate);
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/**
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* regulator_map_voltage_ascend - map_voltage() for ascendant voltage list
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*
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* @rdev: Regulator to operate on
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* @min_uV: Lower bound for voltage
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* @max_uV: Upper bound for voltage
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*
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* Drivers that have ascendant voltage list can use this as their
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* map_voltage() operation.
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*/
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int regulator_map_voltage_ascend(struct regulator_dev *rdev,
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int min_uV, int max_uV)
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{
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int i, ret;
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for (i = 0; i < rdev->desc->n_voltages; i++) {
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ret = rdev->desc->ops->list_voltage(rdev, i);
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if (ret < 0)
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continue;
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if (ret > max_uV)
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break;
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if (ret >= min_uV && ret <= max_uV)
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return i;
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}
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return -EINVAL;
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}
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EXPORT_SYMBOL_GPL(regulator_map_voltage_ascend);
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/**
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* regulator_map_voltage_linear - map_voltage() for simple linear mappings
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*
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* @rdev: Regulator to operate on
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* @min_uV: Lower bound for voltage
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* @max_uV: Upper bound for voltage
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*
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* Drivers providing min_uV and uV_step in their regulator_desc can
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* use this as their map_voltage() operation.
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*/
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int regulator_map_voltage_linear(struct regulator_dev *rdev,
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int min_uV, int max_uV)
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{
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int ret, voltage;
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/* Allow uV_step to be 0 for fixed voltage */
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if (rdev->desc->n_voltages == 1 && rdev->desc->uV_step == 0) {
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if (min_uV <= rdev->desc->min_uV && rdev->desc->min_uV <= max_uV)
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return 0;
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else
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return -EINVAL;
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}
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if (!rdev->desc->uV_step) {
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BUG_ON(!rdev->desc->uV_step);
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return -EINVAL;
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}
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if (min_uV < rdev->desc->min_uV)
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min_uV = rdev->desc->min_uV;
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ret = DIV_ROUND_UP(min_uV - rdev->desc->min_uV, rdev->desc->uV_step);
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if (ret < 0)
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return ret;
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ret += rdev->desc->linear_min_sel;
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/* Map back into a voltage to verify we're still in bounds */
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voltage = rdev->desc->ops->list_voltage(rdev, ret);
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if (voltage < min_uV || voltage > max_uV)
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return -EINVAL;
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return ret;
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}
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EXPORT_SYMBOL_GPL(regulator_map_voltage_linear);
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/**
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* regulator_map_voltage_linear_range - map_voltage() for multiple linear ranges
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*
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* @rdev: Regulator to operate on
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* @min_uV: Lower bound for voltage
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* @max_uV: Upper bound for voltage
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*
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* Drivers providing linear_ranges in their descriptor can use this as
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* their map_voltage() callback.
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*/
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int regulator_map_voltage_linear_range(struct regulator_dev *rdev,
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int min_uV, int max_uV)
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{
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const struct linear_range *range;
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int ret = -EINVAL;
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unsigned int sel;
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bool found;
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int voltage, i;
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if (!rdev->desc->n_linear_ranges) {
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BUG_ON(!rdev->desc->n_linear_ranges);
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return -EINVAL;
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}
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for (i = 0; i < rdev->desc->n_linear_ranges; i++) {
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range = &rdev->desc->linear_ranges[i];
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ret = linear_range_get_selector_high(range, min_uV, &sel,
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&found);
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if (ret)
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continue;
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ret = sel;
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/*
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* Map back into a voltage to verify we're still in bounds.
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* If we are not, then continue checking rest of the ranges.
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*/
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voltage = rdev->desc->ops->list_voltage(rdev, sel);
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if (voltage >= min_uV && voltage <= max_uV)
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break;
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}
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if (i == rdev->desc->n_linear_ranges)
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return -EINVAL;
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return ret;
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}
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EXPORT_SYMBOL_GPL(regulator_map_voltage_linear_range);
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/**
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* regulator_map_voltage_pickable_linear_range - map_voltage, pickable ranges
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*
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* @rdev: Regulator to operate on
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* @min_uV: Lower bound for voltage
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* @max_uV: Upper bound for voltage
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*
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* Drivers providing pickable linear_ranges in their descriptor can use
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* this as their map_voltage() callback.
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*/
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int regulator_map_voltage_pickable_linear_range(struct regulator_dev *rdev,
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int min_uV, int max_uV)
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{
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const struct linear_range *range;
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int ret = -EINVAL;
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int voltage, i;
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unsigned int selector = 0;
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if (!rdev->desc->n_linear_ranges) {
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BUG_ON(!rdev->desc->n_linear_ranges);
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return -EINVAL;
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}
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for (i = 0; i < rdev->desc->n_linear_ranges; i++) {
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int linear_max_uV;
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bool found;
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unsigned int sel;
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range = &rdev->desc->linear_ranges[i];
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linear_max_uV = linear_range_get_max_value(range);
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if (!(min_uV <= linear_max_uV && max_uV >= range->min)) {
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selector += linear_range_values_in_range(range);
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continue;
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}
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ret = linear_range_get_selector_high(range, min_uV, &sel,
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&found);
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if (ret) {
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selector += linear_range_values_in_range(range);
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continue;
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}
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ret = selector + sel - range->min_sel;
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voltage = rdev->desc->ops->list_voltage(rdev, ret);
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/*
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* Map back into a voltage to verify we're still in bounds.
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* We may have overlapping voltage ranges. Hence we don't
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* exit but retry until we have checked all ranges.
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*/
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if (voltage < min_uV || voltage > max_uV)
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selector += linear_range_values_in_range(range);
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else
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break;
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}
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if (i == rdev->desc->n_linear_ranges)
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return -EINVAL;
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return ret;
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}
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EXPORT_SYMBOL_GPL(regulator_map_voltage_pickable_linear_range);
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/**
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* regulator_desc_list_voltage_linear - List voltages with simple calculation
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*
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* @desc: Regulator desc for regulator which volatges are to be listed
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* @selector: Selector to convert into a voltage
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*
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* Regulators with a simple linear mapping between voltages and
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* selectors can set min_uV and uV_step in the regulator descriptor
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* and then use this function prior regulator registration to list
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* the voltages. This is useful when voltages need to be listed during
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* device-tree parsing.
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*/
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int regulator_desc_list_voltage_linear(const struct regulator_desc *desc,
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unsigned int selector)
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{
|
|
if (selector >= desc->n_voltages)
|
|
return -EINVAL;
|
|
|
|
if (selector < desc->linear_min_sel)
|
|
return 0;
|
|
|
|
selector -= desc->linear_min_sel;
|
|
|
|
return desc->min_uV + (desc->uV_step * selector);
|
|
}
|
|
EXPORT_SYMBOL_GPL(regulator_desc_list_voltage_linear);
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
return regulator_desc_list_voltage_linear(rdev->desc, 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 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 sel_indexes;
|
|
|
|
range = &rdev->desc->linear_ranges[i];
|
|
|
|
sel_indexes = linear_range_values_in_range(range) - 1;
|
|
|
|
if (all_sels + sel_indexes >= selector) {
|
|
selector -= all_sels;
|
|
/*
|
|
* As we see here, pickable ranges work only as
|
|
* long as the first selector for each pickable
|
|
* range is 0, and the each subsequent range for
|
|
* this 'pick' follow immediately at next unused
|
|
* selector (Eg. there is no gaps between ranges).
|
|
* I think this is fine but it probably should be
|
|
* documented. OTOH, whole pickable range stuff
|
|
* might benefit from some documentation
|
|
*/
|
|
return range->min + (range->step * selector);
|
|
}
|
|
|
|
all_sels += (sel_indexes + 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)
|
|
{
|
|
unsigned int val;
|
|
int ret;
|
|
|
|
BUG_ON(!desc->n_linear_ranges);
|
|
|
|
ret = linear_range_get_value_array(desc->linear_ranges,
|
|
desc->n_linear_ranges, selector,
|
|
&val);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return val;
|
|
}
|
|
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;
|
|
if (selector < rdev->desc->linear_min_sel)
|
|
return 0;
|
|
|
|
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);
|
|
|
|
static int find_closest_bigger(unsigned int target, const unsigned int *table,
|
|
unsigned int num_sel, unsigned int *sel)
|
|
{
|
|
unsigned int s, tmp, max, maxsel = 0;
|
|
bool found = false;
|
|
|
|
max = table[0];
|
|
|
|
for (s = 0; s < num_sel; s++) {
|
|
if (table[s] > max) {
|
|
max = table[s];
|
|
maxsel = s;
|
|
}
|
|
if (table[s] >= target) {
|
|
if (!found || table[s] - target < tmp - target) {
|
|
tmp = table[s];
|
|
*sel = s;
|
|
found = true;
|
|
if (tmp == target)
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!found) {
|
|
*sel = maxsel;
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* regulator_set_ramp_delay_regmap - set_ramp_delay() helper
|
|
*
|
|
* @rdev: regulator to operate on
|
|
*
|
|
* Regulators that use regmap for their register I/O can set the ramp_reg
|
|
* and ramp_mask fields in their descriptor and then use this as their
|
|
* set_ramp_delay operation, saving some code.
|
|
*/
|
|
int regulator_set_ramp_delay_regmap(struct regulator_dev *rdev, int ramp_delay)
|
|
{
|
|
int ret;
|
|
unsigned int sel;
|
|
|
|
if (WARN_ON(!rdev->desc->n_ramp_values || !rdev->desc->ramp_delay_table))
|
|
return -EINVAL;
|
|
|
|
ret = find_closest_bigger(ramp_delay, rdev->desc->ramp_delay_table,
|
|
rdev->desc->n_ramp_values, &sel);
|
|
|
|
if (ret) {
|
|
dev_warn(rdev_get_dev(rdev),
|
|
"Can't set ramp-delay %u, setting %u\n", ramp_delay,
|
|
rdev->desc->ramp_delay_table[sel]);
|
|
}
|
|
|
|
sel <<= ffs(rdev->desc->ramp_mask) - 1;
|
|
|
|
return regmap_update_bits(rdev->regmap, rdev->desc->ramp_reg,
|
|
rdev->desc->ramp_mask, sel);
|
|
}
|
|
EXPORT_SYMBOL_GPL(regulator_set_ramp_delay_regmap);
|