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regulator: tps65910: Provide settling time for DCDC voltage change

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Settling time is require when there is dcdc rail's voltage change.
Returning proper delay time for dcdc voltage change to settle down
the output voltage to new value.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Laxman Dewangan 2012-03-14 13:00:58 +05:30 committed by Mark Brown
parent e3e5aff714
commit 18039e0f16
1 changed files with 32 additions and 13 deletions
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45
drivers/regulator/tps65910-regulator.c
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@ -561,10 +561,10 @@ static unsigned int tps65910_get_mode(struct regulator_dev *dev)
return REGULATOR_MODE_NORMAL;
}
static int tps65910_get_voltage_dcdc(struct regulator_dev *dev)
static int tps65910_get_voltage_dcdc_sel(struct regulator_dev *dev)
{
struct tps65910_reg *pmic = rdev_get_drvdata(dev);
int id = rdev_get_id(dev), voltage = 0;
int id = rdev_get_id(dev);
int opvsel = 0, srvsel = 0, vselmax = 0, mult = 0, sr = 0;
switch (id) {
@ -608,9 +608,7 @@ static int tps65910_get_voltage_dcdc(struct regulator_dev *dev)
srvsel = 3;
if (srvsel > vselmax)
srvsel = vselmax;
srvsel -= 3;
voltage = (srvsel * VDD1_2_OFFSET + VDD1_2_MIN_VOLT) * 100;
return srvsel - 3;
} else {
/* normalise to valid range*/
@ -618,14 +616,9 @@ static int tps65910_get_voltage_dcdc(struct regulator_dev *dev)
opvsel = 3;
if (opvsel > vselmax)
opvsel = vselmax;
opvsel -= 3;
voltage = (opvsel * VDD1_2_OFFSET + VDD1_2_MIN_VOLT) * 100;
return opvsel - 3;
}
voltage *= mult;
return voltage;
return -EINVAL;
}
static int tps65910_get_voltage(struct regulator_dev *dev)
@ -894,6 +887,31 @@ static int tps65911_list_voltage(struct regulator_dev *dev, unsigned selector)
return (LDO_MIN_VOLT + selector * step_mv) * 1000;
}
static int tps65910_set_voltage_dcdc_time_sel(struct regulator_dev *dev,
unsigned int old_selector, unsigned int new_selector)
{
int id = rdev_get_id(dev);
int old_volt, new_volt;
old_volt = tps65910_list_voltage_dcdc(dev, old_selector);
if (old_volt < 0)
return old_volt;
new_volt = tps65910_list_voltage_dcdc(dev, new_selector);
if (new_volt < 0)
return new_volt;
/* VDD1 and VDD2 are 12.5mV/us, VDDCTRL is 100mV/20us */
switch (id) {
case TPS65910_REG_VDD1:
case TPS65910_REG_VDD2:
return DIV_ROUND_UP(abs(old_volt - new_volt), 12500);
case TPS65911_REG_VDDCTRL:
return DIV_ROUND_UP(abs(old_volt - new_volt), 5000);
}
return -EINVAL;
}
/* Regulator ops (except VRTC) */
static struct regulator_ops tps65910_ops_dcdc = {
.is_enabled = tps65910_is_enabled,
@ -902,8 +920,9 @@ static struct regulator_ops tps65910_ops_dcdc = {
.enable_time = tps65910_enable_time,
.set_mode = tps65910_set_mode,
.get_mode = tps65910_get_mode,
.get_voltage = tps65910_get_voltage_dcdc,
.get_voltage_sel = tps65910_get_voltage_dcdc_sel,
.set_voltage_sel = tps65910_set_voltage_dcdc_sel,
.set_voltage_time_sel = tps65910_set_voltage_dcdc_time_sel,
.list_voltage = tps65910_list_voltage_dcdc,
};