Commit a60cfce0 authored by Laxman Dewangan's avatar Laxman Dewangan Committed by Mark Brown

regulator: tps62360: Provide settling time for voltage change

Settling time is require when there is voltage output change.
Implement set_voltage_time_sel() callback which returns delay time
for voltage change to settle down to new value.
Signed-off-by: default avatarLaxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent 16ea003b
...@@ -71,6 +71,7 @@ struct tps62360_chip { ...@@ -71,6 +71,7 @@ struct tps62360_chip {
int lru_index[4]; int lru_index[4];
int curr_vset_vsel[4]; int curr_vset_vsel[4];
int curr_vset_id; int curr_vset_id;
int change_uv_per_us;
}; };
/* /*
...@@ -114,7 +115,7 @@ static bool find_voltage_set_register(struct tps62360_chip *tps, ...@@ -114,7 +115,7 @@ static bool find_voltage_set_register(struct tps62360_chip *tps,
return found; return found;
} }
static int tps62360_dcdc_get_voltage(struct regulator_dev *dev) static int tps62360_dcdc_get_voltage_sel(struct regulator_dev *dev)
{ {
struct tps62360_chip *tps = rdev_get_drvdata(dev); struct tps62360_chip *tps = rdev_get_drvdata(dev);
int vsel; int vsel;
...@@ -128,7 +129,7 @@ static int tps62360_dcdc_get_voltage(struct regulator_dev *dev) ...@@ -128,7 +129,7 @@ static int tps62360_dcdc_get_voltage(struct regulator_dev *dev)
return ret; return ret;
} }
vsel = (int)data & tps->voltage_reg_mask; vsel = (int)data & tps->voltage_reg_mask;
return (tps->voltage_base + vsel * 10) * 1000; return vsel;
} }
static int tps62360_dcdc_set_voltage(struct regulator_dev *dev, static int tps62360_dcdc_set_voltage(struct regulator_dev *dev,
...@@ -193,10 +194,28 @@ static int tps62360_dcdc_list_voltage(struct regulator_dev *dev, ...@@ -193,10 +194,28 @@ static int tps62360_dcdc_list_voltage(struct regulator_dev *dev,
return (tps->voltage_base + selector * 10) * 1000; return (tps->voltage_base + selector * 10) * 1000;
} }
static int tps62360_set_voltage_time_sel(struct regulator_dev *rdev,
unsigned int old_selector, unsigned int new_selector)
{
struct tps62360_chip *tps = rdev_get_drvdata(rdev);
int old_uV, new_uV;
old_uV = tps62360_dcdc_list_voltage(rdev, old_selector);
if (old_uV < 0)
return old_uV;
new_uV = tps62360_dcdc_list_voltage(rdev, new_selector);
if (new_uV < 0)
return new_uV;
return DIV_ROUND_UP(abs(old_uV - new_uV), tps->change_uv_per_us);
}
static struct regulator_ops tps62360_dcdc_ops = { static struct regulator_ops tps62360_dcdc_ops = {
.get_voltage = tps62360_dcdc_get_voltage, .get_voltage_sel = tps62360_dcdc_get_voltage_sel,
.set_voltage = tps62360_dcdc_set_voltage, .set_voltage = tps62360_dcdc_set_voltage,
.list_voltage = tps62360_dcdc_list_voltage, .list_voltage = tps62360_dcdc_list_voltage,
.set_voltage_time_sel = tps62360_set_voltage_time_sel,
}; };
static int tps62360_init_force_pwm(struct tps62360_chip *tps, static int tps62360_init_force_pwm(struct tps62360_chip *tps,
...@@ -228,6 +247,7 @@ static int tps62360_init_dcdc(struct tps62360_chip *tps, ...@@ -228,6 +247,7 @@ static int tps62360_init_dcdc(struct tps62360_chip *tps,
{ {
int ret; int ret;
int i; int i;
unsigned int ramp_ctrl;
/* Initailize internal pull up/down control */ /* Initailize internal pull up/down control */
if (tps->en_internal_pulldn) if (tps->en_internal_pulldn)
...@@ -255,9 +275,23 @@ static int tps62360_init_dcdc(struct tps62360_chip *tps, ...@@ -255,9 +275,23 @@ static int tps62360_init_dcdc(struct tps62360_chip *tps,
/* Reset output discharge path to reduce power consumption */ /* Reset output discharge path to reduce power consumption */
ret = regmap_update_bits(tps->regmap, REG_RAMPCTRL, BIT(2), 0); ret = regmap_update_bits(tps->regmap, REG_RAMPCTRL, BIT(2), 0);
if (ret < 0) if (ret < 0) {
dev_err(tps->dev, "%s() fails in updating reg %d\n", dev_err(tps->dev, "%s() fails in updating reg %d\n",
__func__, REG_RAMPCTRL); __func__, REG_RAMPCTRL);
return ret;
}
/* Get ramp value from ramp control register */
ret = regmap_read(tps->regmap, REG_RAMPCTRL, &ramp_ctrl);
if (ret < 0) {
dev_err(tps->dev, "%s() fails in reading reg %d\n",
__func__, REG_RAMPCTRL);
return ret;
}
ramp_ctrl = (ramp_ctrl >> 4) & 0x7;
/* ramp mV/us = 32/(2^ramp_ctrl) */
tps->change_uv_per_us = DIV_ROUND_UP(32000, BIT(ramp_ctrl));
return ret; return ret;
} }
......
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