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Merge remote-tracking branch 'regulator/topic/helpers' into regulator-next

This commit is contained in:
Mark Brown 2013-09-01 13:50:09 +01:00
parent 446b4665e3 d295f76701
commit 724d054490
4 changed files with 458 additions and 463 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/regulator/Makefile
View File

@ -3,7 +3,7 @@
#
obj-$(CONFIG_REGULATOR) += core.o dummy.o fixed-helper.o
obj-$(CONFIG_REGULATOR) += core.o dummy.o fixed-helper.o helpers.o
obj-$(CONFIG_OF) += of_regulator.o
obj-$(CONFIG_REGULATOR_FIXED_VOLTAGE) += fixed.o
obj-$(CONFIG_REGULATOR_VIRTUAL_CONSUMER) += virtual.o

427
drivers/regulator/core.c
View File

@ -1904,77 +1904,6 @@ int regulator_disable_deferred(struct regulator *regulator, int ms)
}
EXPORT_SYMBOL_GPL(regulator_disable_deferred);
/**
* 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;
if (rdev->desc->enable_is_inverted)
return (val & rdev->desc->enable_mask) == 0;
else
return (val & rdev->desc->enable_mask) != 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 = 0;
else
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_mask;
else
val = 0;
return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
rdev->desc->enable_mask, val);
}
EXPORT_SYMBOL_GPL(regulator_disable_regmap);
static int _regulator_is_enabled(struct regulator_dev *rdev)
{
/* A GPIO control always takes precedence */
@ -2059,92 +1988,6 @@ int regulator_count_voltages(struct regulator *regulator)
}
EXPORT_SYMBOL_GPL(regulator_count_voltages);
/**
* 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_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)
{
const struct regulator_linear_range *range;
int 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++) {
range = &rdev->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_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_list_voltage - enumerate supported voltages
* @regulator: regulator source
@ -2239,235 +2082,6 @@ int regulator_is_supported_voltage(struct regulator *regulator,
}
EXPORT_SYMBOL_GPL(regulator_is_supported_voltage);
/**
* 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 - 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++) {
range = &rdev->desc->linear_ranges[i];
if (!(min_uV <= range->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;
break;
}
if (i == rdev->desc->n_linear_ranges)
return -EINVAL;
/* 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_range);
static int _regulator_do_set_voltage(struct regulator_dev *rdev,
int min_uV, int max_uV)
{
@ -3070,47 +2684,6 @@ out:
}
EXPORT_SYMBOL_GPL(regulator_set_optimum_mode);
/**
* 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_mask;
else
val = 0;
return regmap_update_bits(rdev->regmap, rdev->desc->bypass_reg,
rdev->desc->bypass_mask, val);
}
EXPORT_SYMBOL_GPL(regulator_set_bypass_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;
int ret;
ret = regmap_read(rdev->regmap, rdev->desc->bypass_reg, &val);
if (ret != 0)
return ret;
*enable = val & rdev->desc->bypass_mask;
return 0;
}
EXPORT_SYMBOL_GPL(regulator_get_bypass_regmap);
/**
* regulator_allow_bypass - allow the regulator to go into bypass mode
*

45
drivers/regulator/da903x.c
View File

@ -252,39 +252,12 @@ static int da9034_set_dvc_voltage_sel(struct regulator_dev *rdev,
return ret;
}
static int da9034_map_ldo12_voltage(struct regulator_dev *rdev,
int min_uV, int max_uV)
{
struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
int sel;
if (check_range(info, min_uV, max_uV)) {
pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
return -EINVAL;
}
sel = DIV_ROUND_UP(min_uV - info->desc.min_uV, info->desc.uV_step);
sel = (sel >= 20) ? sel - 12 : ((sel > 7) ? 8 : sel);
return sel;
}
static int da9034_list_ldo12_voltage(struct regulator_dev *rdev,
unsigned selector)
{
struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
int volt;
if (selector >= 8)
volt = 2700000 + rdev->desc->uV_step * (selector - 8);
else
volt = rdev->desc->min_uV + rdev->desc->uV_step * selector;
if (volt > info->max_uV)
return -EINVAL;
return volt;
}
static const struct regulator_linear_range da9034_ldo12_ranges[] = {
{ .min_uV = 1700000, .max_uV = 2050000, .min_sel = 0, .max_sel = 7,
.uV_step = 50000 },
{ .min_uV = 2700000, .max_uV = 3050000, .min_sel = 8, .max_sel = 15,
.uV_step = 50000 },
};
static struct regulator_ops da903x_regulator_ldo_ops = {
.set_voltage_sel = da903x_set_voltage_sel,
@ -332,8 +305,8 @@ static struct regulator_ops da9034_regulator_dvc_ops = {
static struct regulator_ops da9034_regulator_ldo12_ops = {
.set_voltage_sel = da903x_set_voltage_sel,
.get_voltage_sel = da903x_get_voltage_sel,
.list_voltage = da9034_list_ldo12_voltage,
.map_voltage = da9034_map_ldo12_voltage,
.list_voltage = regulator_list_voltage_linear_range,
.map_voltage = regulator_map_voltage_linear_range,
.enable = da903x_enable,
.disable = da903x_disable,
.is_enabled = da903x_is_enabled,
@ -476,6 +449,8 @@ static int da903x_regulator_probe(struct platform_device *pdev)
if (ri->desc.id == DA9034_ID_LDO12) {
ri->desc.ops = &da9034_regulator_ldo12_ops;
ri->desc.n_voltages = 16;
ri->desc.linear_ranges = da9034_ldo12_ranges;
ri->desc.n_linear_ranges = ARRAY_SIZE(da9034_ldo12_ranges);
}
if (ri->desc.id == DA9030_ID_LDO14)

447
drivers/regulator/helpers.c Normal file
View File

@ -0,0 +1,447 @@
/*
* helpers.c -- Voltage/Current Regulator framework helper functions.
*
* Copyright 2007, 2008 Wolfson Microelectronics PLC.
* Copyright 2008 SlimLogic Ltd.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
*/
#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>
/**
* 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;
if (rdev->desc->enable_is_inverted)
return (val & rdev->desc->enable_mask) == 0;
else
return (val & rdev->desc->enable_mask) != 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 = 0;
else
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_mask;
else
val = 0;
return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
rdev->desc->enable_mask, val);
}
EXPORT_SYMBOL_GPL(regulator_disable_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 - 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++) {
range = &rdev->desc->linear_ranges[i];
if (!(min_uV <= range->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;
break;
}
if (i == rdev->desc->n_linear_ranges)
return -EINVAL;
/* 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_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_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)
{
const struct regulator_linear_range *range;
int 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++) {
range = &rdev->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_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_mask;
else
val = 0;
return regmap_update_bits(rdev->regmap, rdev->desc->bypass_reg,
rdev->desc->bypass_mask, val);
}
EXPORT_SYMBOL_GPL(regulator_set_bypass_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;
int ret;
ret = regmap_read(rdev->regmap, rdev->desc->bypass_reg, &val);
if (ret != 0)
return ret;
*enable = val & rdev->desc->bypass_mask;
return 0;
}
EXPORT_SYMBOL_GPL(regulator_get_bypass_regmap);