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Commit 5ff26a14 authored by Mark Brown's avatar Mark Brown
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regulator: wm831x-ldo: Convert to use linear ranges 

Signed-off-by: default avatarMark Brown <broonie@linaro.org>
parent 6692e432
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Showing with 24 additions and 80 deletions
drivers/regulator/wm831x-ldo.c
View file @ 5ff26a14
......@@ -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;
......
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