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Commit e54e6aa2 authored by Mark Brown's avatar Mark Brown
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Merge remote-tracking branch 'regulator/topic/linear-range' into HEAD

parents 82b736df 6c918d22
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Showing with 177 additions and 152 deletions
drivers/regulator/core.c
View file @ e54e6aa2
......@@ -2078,6 +2078,43 @@ int regulator_list_voltage_linear(struct regulator_dev *rdev,
}
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
*
......@@ -2368,6 +2405,64 @@ int regulator_map_voltage_linear(struct regulator_dev *rdev,
}
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)
{
......
drivers/regulator/wm831x-ldo.c
View file @ e54e6aa2
......@@ -62,41 +62,12 @@ static irqreturn_t wm831x_ldo_uv_irq(int irq, void *data)
* General purpose LDOs
*/
#define WM831X_GP_LDO_SELECTOR_LOW 0xe
#define WM831X_GP_LDO_MAX_SELECTOR 0x1f
static int wm831x_gp_ldo_list_voltage(struct regulator_dev *rdev,
unsigned int selector)
{
/* 0.9-1.6V in 50mV steps */
if (selector <= WM831X_GP_LDO_SELECTOR_LOW)
return 900000 + (selector * 50000);
/* 1.7-3.3V in 100mV steps */
if (selector <= WM831X_GP_LDO_MAX_SELECTOR)
return 1600000 + ((selector - WM831X_GP_LDO_SELECTOR_LOW)
* 100000);
return -EINVAL;
}
static int wm831x_gp_ldo_map_voltage(struct regulator_dev *rdev,
int min_uV, int max_uV)
{
int volt, vsel;
if (min_uV < 900000)
vsel = 0;
else if (min_uV < 1700000)
vsel = ((min_uV - 900000) / 50000);
else
vsel = ((min_uV - 1700000) / 100000)
+ WM831X_GP_LDO_SELECTOR_LOW + 1;
volt = wm831x_gp_ldo_list_voltage(rdev, vsel);
if (volt < min_uV || volt > max_uV)
return -EINVAL;
return vsel;
}
static const struct regulator_linear_range wm831x_gp_ldo_ranges[] = {
{ .min_uV = 900000, .max_uV = 1650000, .min_sel = 0, .max_sel = 14,
.uV_step = 50000 },
{ .min_uV = 1700000, .max_uV = 3300000, .min_sel = 15, .max_sel = 31,
.uV_step = 100000 },
};
static int wm831x_gp_ldo_set_suspend_voltage(struct regulator_dev *rdev,
int uV)
......@@ -105,7 +76,7 @@ static int wm831x_gp_ldo_set_suspend_voltage(struct regulator_dev *rdev,
struct wm831x *wm831x = ldo->wm831x;
int sel, reg = ldo->base + WM831X_LDO_SLEEP_CONTROL;
sel = wm831x_gp_ldo_map_voltage(rdev, uV, uV);
sel = regulator_map_voltage_linear_range(rdev, uV, uV);
if (sel < 0)
return sel;
......@@ -230,8 +201,8 @@ static unsigned int wm831x_gp_ldo_get_optimum_mode(struct regulator_dev *rdev,
static struct regulator_ops wm831x_gp_ldo_ops = {
.list_voltage = wm831x_gp_ldo_list_voltage,
.map_voltage = wm831x_gp_ldo_map_voltage,
.list_voltage = regulator_list_voltage_linear_range,
.map_voltage = regulator_map_voltage_linear_range,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.set_suspend_voltage = wm831x_gp_ldo_set_suspend_voltage,
......@@ -290,7 +261,7 @@ static int wm831x_gp_ldo_probe(struct platform_device *pdev)
ldo->desc.id = id;
ldo->desc.type = REGULATOR_VOLTAGE;
ldo->desc.n_voltages = WM831X_GP_LDO_MAX_SELECTOR + 1;
ldo->desc.n_voltages = 32;
ldo->desc.ops = &wm831x_gp_ldo_ops;
ldo->desc.owner = THIS_MODULE;
ldo->desc.vsel_reg = ldo->base + WM831X_LDO_ON_CONTROL;
......@@ -299,6 +270,8 @@ static int wm831x_gp_ldo_probe(struct platform_device *pdev)
ldo->desc.enable_mask = 1 << id;
ldo->desc.bypass_reg = ldo->base;
ldo->desc.bypass_mask = WM831X_LDO1_SWI;
ldo->desc.linear_ranges = wm831x_gp_ldo_ranges;
ldo->desc.n_linear_ranges = ARRAY_SIZE(wm831x_gp_ldo_ranges);
config.dev = pdev->dev.parent;
if (pdata)
......@@ -358,43 +331,12 @@ static struct platform_driver wm831x_gp_ldo_driver = {
* Analogue LDOs
*/
#define WM831X_ALDO_SELECTOR_LOW 0xc
#define WM831X_ALDO_MAX_SELECTOR 0x1f
static int wm831x_aldo_list_voltage(struct regulator_dev *rdev,
unsigned int selector)
{
/* 1-1.6V in 50mV steps */
if (selector <= WM831X_ALDO_SELECTOR_LOW)
return 1000000 + (selector * 50000);
/* 1.7-3.5V in 100mV steps */
if (selector <= WM831X_ALDO_MAX_SELECTOR)
return 1600000 + ((selector - WM831X_ALDO_SELECTOR_LOW)
* 100000);
return -EINVAL;
}
static int wm831x_aldo_map_voltage(struct regulator_dev *rdev,
int min_uV, int max_uV)
{
int volt, vsel;
if (min_uV < 1000000)
vsel = 0;
else if (min_uV < 1700000)
vsel = ((min_uV - 1000000) / 50000);
else
vsel = ((min_uV - 1700000) / 100000)
+ WM831X_ALDO_SELECTOR_LOW + 1;
volt = wm831x_aldo_list_voltage(rdev, vsel);
if (volt < min_uV || volt > max_uV)
return -EINVAL;
return vsel;
}
static const struct regulator_linear_range wm831x_aldo_ranges[] = {
{ .min_uV = 1000000, .max_uV = 1650000, .min_sel = 0, .max_sel = 12,
.uV_step = 50000 },
{ .min_uV = 1700000, .max_uV = 3500000, .min_sel = 13, .max_sel = 31,
.uV_step = 100000 },
};
static int wm831x_aldo_set_suspend_voltage(struct regulator_dev *rdev,
int uV)
......@@ -403,7 +345,7 @@ static int wm831x_aldo_set_suspend_voltage(struct regulator_dev *rdev,
struct wm831x *wm831x = ldo->wm831x;
int sel, reg = ldo->base + WM831X_LDO_SLEEP_CONTROL;
sel = wm831x_aldo_map_voltage(rdev, uV, uV);
sel = regulator_map_voltage_linear_range(rdev, uV, uV);
if (sel < 0)
return sel;
......@@ -486,8 +428,8 @@ static int wm831x_aldo_get_status(struct regulator_dev *rdev)
}
static struct regulator_ops wm831x_aldo_ops = {
.list_voltage = wm831x_aldo_list_voltage,
.map_voltage = wm831x_aldo_map_voltage,
.list_voltage = regulator_list_voltage_linear_range,
.map_voltage = regulator_map_voltage_linear_range,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.set_suspend_voltage = wm831x_aldo_set_suspend_voltage,
......@@ -545,7 +487,9 @@ static int wm831x_aldo_probe(struct platform_device *pdev)
ldo->desc.id = id;
ldo->desc.type = REGULATOR_VOLTAGE;
ldo->desc.n_voltages = WM831X_ALDO_MAX_SELECTOR + 1;
ldo->desc.n_voltages = 32;
ldo->desc.linear_ranges = wm831x_aldo_ranges;
ldo->desc.n_linear_ranges = ARRAY_SIZE(wm831x_aldo_ranges);
ldo->desc.ops = &wm831x_aldo_ops;
ldo->desc.owner = THIS_MODULE;
ldo->desc.vsel_reg = ldo->base + WM831X_LDO_ON_CONTROL;
......
drivers/regulator/wm8350-regulator.c
View file @ e54e6aa2
......@@ -542,41 +542,12 @@ static int wm8350_dcdc_set_suspend_mode(struct regulator_dev *rdev,
return 0;
}
static int wm8350_ldo_list_voltage(struct regulator_dev *rdev,
unsigned selector)
{
if (selector > WM8350_LDO1_VSEL_MASK)
return -EINVAL;
if (selector < 16)
return (selector * 50000) + 900000;
else
return ((selector - 16) * 100000) + 1800000;
}
static int wm8350_ldo_map_voltage(struct regulator_dev *rdev, int min_uV,
int max_uV)
{
int volt, sel;
int min_mV = min_uV / 1000;
int max_mV = max_uV / 1000;
if (min_mV < 900 || min_mV > 3300)
return -EINVAL;
if (max_mV < 900 || max_mV > 3300)
return -EINVAL;
if (min_mV < 1800) /* step size is 50mV < 1800mV */
sel = DIV_ROUND_UP(min_uV - 900, 50);
else /* step size is 100mV > 1800mV */
sel = DIV_ROUND_UP(min_uV - 1800, 100) + 16;
volt = wm8350_ldo_list_voltage(rdev, sel);
if (volt < min_uV || volt > max_uV)
return -EINVAL;
return sel;
}
static const struct regulator_linear_range wm8350_ldo_ranges[] = {
{ .min_uV = 900000, .max_uV = 1750000, .min_sel = 0, .max_sel = 15,
.uV_step = 50000 },
{ .min_uV = 1800000, .max_uV = 3300000, .min_sel = 16, .max_sel = 31,
.uV_step = 100000 },
};
static int wm8350_ldo_set_suspend_voltage(struct regulator_dev *rdev, int uV)
{
......@@ -603,7 +574,7 @@ static int wm8350_ldo_set_suspend_voltage(struct regulator_dev *rdev, int uV)
return -EINVAL;
}
sel = wm8350_ldo_map_voltage(rdev, uV, uV);
sel = regulator_map_voltage_linear_range(rdev, uV, uV);
if (sel < 0)
return -EINVAL;
......@@ -998,10 +969,10 @@ static struct regulator_ops wm8350_dcdc2_5_ops = {
};
static struct regulator_ops wm8350_ldo_ops = {
.map_voltage = wm8350_ldo_map_voltage,
.map_voltage = regulator_map_voltage_linear_range,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.list_voltage = wm8350_ldo_list_voltage,
.list_voltage = regulator_list_voltage_linear_range,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
......@@ -1108,6 +1079,8 @@ static const struct regulator_desc wm8350_reg[NUM_WM8350_REGULATORS] = {
.irq = WM8350_IRQ_UV_LDO1,
.type = REGULATOR_VOLTAGE,
.n_voltages = WM8350_LDO1_VSEL_MASK + 1,
.linear_ranges = wm8350_ldo_ranges,
.n_linear_ranges = ARRAY_SIZE(wm8350_ldo_ranges),
.vsel_reg = WM8350_LDO1_CONTROL,
.vsel_mask = WM8350_LDO1_VSEL_MASK,
.enable_reg = WM8350_DCDC_LDO_REQUESTED,
......@@ -1121,6 +1094,8 @@ static const struct regulator_desc wm8350_reg[NUM_WM8350_REGULATORS] = {
.irq = WM8350_IRQ_UV_LDO2,
.type = REGULATOR_VOLTAGE,
.n_voltages = WM8350_LDO2_VSEL_MASK + 1,
.linear_ranges = wm8350_ldo_ranges,
.n_linear_ranges = ARRAY_SIZE(wm8350_ldo_ranges),
.vsel_reg = WM8350_LDO2_CONTROL,
.vsel_mask = WM8350_LDO2_VSEL_MASK,
.enable_reg = WM8350_DCDC_LDO_REQUESTED,
......@@ -1134,6 +1109,8 @@ static const struct regulator_desc wm8350_reg[NUM_WM8350_REGULATORS] = {
.irq = WM8350_IRQ_UV_LDO3,
.type = REGULATOR_VOLTAGE,
.n_voltages = WM8350_LDO3_VSEL_MASK + 1,
.linear_ranges = wm8350_ldo_ranges,
.n_linear_ranges = ARRAY_SIZE(wm8350_ldo_ranges),
.vsel_reg = WM8350_LDO3_CONTROL,
.vsel_mask = WM8350_LDO3_VSEL_MASK,
.enable_reg = WM8350_DCDC_LDO_REQUESTED,
......@@ -1147,6 +1124,8 @@ static const struct regulator_desc wm8350_reg[NUM_WM8350_REGULATORS] = {
.irq = WM8350_IRQ_UV_LDO4,
.type = REGULATOR_VOLTAGE,
.n_voltages = WM8350_LDO4_VSEL_MASK + 1,
.linear_ranges = wm8350_ldo_ranges,
.n_linear_ranges = ARRAY_SIZE(wm8350_ldo_ranges),
.vsel_reg = WM8350_LDO4_CONTROL,
.vsel_mask = WM8350_LDO4_VSEL_MASK,
.enable_reg = WM8350_DCDC_LDO_REQUESTED,
......
drivers/regulator/wm8400-regulator.c
View file @ e54e6aa2
......@@ -19,47 +19,21 @@
#include <linux/regulator/driver.h>
#include <linux/mfd/wm8400-private.h>
static int wm8400_ldo_list_voltage(struct regulator_dev *dev,
unsigned selector)
{
if (selector > WM8400_LDO1_VSEL_MASK)
return -EINVAL;
if (selector < 15)
return 900000 + (selector * 50000);
else
return 1700000 + ((selector - 15) * 100000);
}
static int wm8400_ldo_map_voltage(struct regulator_dev *dev,
int min_uV, int max_uV)
{
u16 val;
int volt;
if (min_uV < 900000 || min_uV > 3300000)
return -EINVAL;
if (min_uV < 1700000) /* Steps of 50mV from 900mV; */
val = DIV_ROUND_UP(min_uV - 900000, 50000);
else /* Steps of 100mV from 1700mV */
val = DIV_ROUND_UP(min_uV - 1700000, 100000) + 15;
volt = wm8400_ldo_list_voltage(dev, val);
if (volt < min_uV || volt > max_uV)
return -EINVAL;
return val;
}
static const struct regulator_linear_range wm8400_ldo_ranges[] = {
{ .min_uV = 900000, .max_uV = 1600000, .min_sel = 0, .max_sel = 14,
.uV_step = 50000 },
{ .min_uV = 1700000, .max_uV = 3300000, .min_sel = 15, .max_sel = 31,
.uV_step = 100000 },
};
static struct regulator_ops wm8400_ldo_ops = {
.is_enabled = regulator_is_enabled_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.list_voltage = wm8400_ldo_list_voltage,
.list_voltage = regulator_list_voltage_linear_range,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.map_voltage = wm8400_ldo_map_voltage,
.map_voltage = regulator_map_voltage_linear_range,
};
static unsigned int wm8400_dcdc_get_mode(struct regulator_dev *dev)
......@@ -155,6 +129,8 @@ static struct regulator_desc regulators[] = {
.enable_reg = WM8400_LDO1_CONTROL,
.enable_mask = WM8400_LDO1_ENA,
.n_voltages = WM8400_LDO1_VSEL_MASK + 1,
.linear_ranges = wm8400_ldo_ranges,
.n_linear_ranges = ARRAY_SIZE(wm8400_ldo_ranges),
.vsel_reg = WM8400_LDO1_CONTROL,
.vsel_mask = WM8400_LDO1_VSEL_MASK,
.type = REGULATOR_VOLTAGE,
......@@ -167,6 +143,8 @@ static struct regulator_desc regulators[] = {
.enable_reg = WM8400_LDO2_CONTROL,
.enable_mask = WM8400_LDO2_ENA,
.n_voltages = WM8400_LDO2_VSEL_MASK + 1,
.linear_ranges = wm8400_ldo_ranges,
.n_linear_ranges = ARRAY_SIZE(wm8400_ldo_ranges),
.type = REGULATOR_VOLTAGE,
.vsel_reg = WM8400_LDO2_CONTROL,
.vsel_mask = WM8400_LDO2_VSEL_MASK,
......@@ -179,6 +157,8 @@ static struct regulator_desc regulators[] = {
.enable_reg = WM8400_LDO3_CONTROL,
.enable_mask = WM8400_LDO3_ENA,
.n_voltages = WM8400_LDO3_VSEL_MASK + 1,
.linear_ranges = wm8400_ldo_ranges,
.n_linear_ranges = ARRAY_SIZE(wm8400_ldo_ranges),
.vsel_reg = WM8400_LDO3_CONTROL,
.vsel_mask = WM8400_LDO3_VSEL_MASK,
.type = REGULATOR_VOLTAGE,
......@@ -191,6 +171,8 @@ static struct regulator_desc regulators[] = {
.enable_reg = WM8400_LDO4_CONTROL,
.enable_mask = WM8400_LDO4_ENA,
.n_voltages = WM8400_LDO4_VSEL_MASK + 1,
.linear_ranges = wm8400_ldo_ranges,
.n_linear_ranges = ARRAY_SIZE(wm8400_ldo_ranges),
.vsel_reg = WM8400_LDO4_CONTROL,
.vsel_mask = WM8400_LDO4_VSEL_MASK,
.type = REGULATOR_VOLTAGE,
......
include/linux/regulator/driver.h
View file @ e54e6aa2
......@@ -39,6 +39,24 @@ enum regulator_status {
REGULATOR_STATUS_UNDEFINED,
};
/**
* Specify a range of voltages for regulator_map_linar_range() and
* regulator_list_linear_range().
*
* @min_uV: Lowest voltage in range
* @max_uV: Highest voltage in range
* @min_sel: Lowest selector for range
* @max_sel: Highest selector for range
* @uV_step: Step size
*/
struct regulator_linear_range {
unsigned int min_uV;
unsigned int max_uV;
unsigned int min_sel;
unsigned int max_sel;
unsigned int uV_step;
};
/**
* struct regulator_ops - regulator operations.
*
......@@ -223,6 +241,9 @@ struct regulator_desc {
unsigned int linear_min_sel;
unsigned int ramp_delay;
const struct regulator_linear_range *linear_ranges;
int n_linear_ranges;
const unsigned int *volt_table;
unsigned int vsel_reg;
......@@ -326,10 +347,14 @@ int regulator_mode_to_status(unsigned int);
int regulator_list_voltage_linear(struct regulator_dev *rdev,
unsigned int selector);
int regulator_list_voltage_linear_range(struct regulator_dev *rdev,
unsigned int selector);
int regulator_list_voltage_table(struct regulator_dev *rdev,
unsigned int selector);
int regulator_map_voltage_linear(struct regulator_dev *rdev,
int min_uV, int max_uV);
int regulator_map_voltage_linear_range(struct regulator_dev *rdev,
int min_uV, int max_uV);
int regulator_map_voltage_iterate(struct regulator_dev *rdev,
int min_uV, int max_uV);
int regulator_map_voltage_ascend(struct regulator_dev *rdev,
......
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