diff options
| author | Laxman Dewangan <ldewangan@nvidia.com> | 2012-03-14 13:00:58 +0530 |
|---|---|---|
| committer | Simone Willett <swillett@nvidia.com> | 2012-03-18 20:28:05 -0700 |
| commit | 2b0c57ebdb21a6d930c97c935441fab46dcbacfc (patch) | |
| tree | 3a0b3973700ca91ac90505bf2cf4e9d304bb84df /drivers/regulator | |
| parent | bda3f180aa3f5eb60aebd9fd093dc7cb4f16cd79 (diff) | |
regulator: tps65910: Provide settling time for DCDC voltage change
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>
(cherry picked from commit 18039e0f16d50c8243fe0388a587c25a3b155ece)
Change-Id: Ibd67d2661dd1d5b014754c221d44963baeb13726
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-on: http://git-master/r/90518
Reviewed-by: Automatic_Commit_Validation_User
Diffstat (limited to 'drivers/regulator')
| -rw-r--r-- | drivers/regulator/tps65910-regulator.c | 45 |
1 files changed, 32 insertions, 13 deletions
diff --git a/drivers/regulator/tps65910-regulator.c b/drivers/regulator/tps65910-regulator.c index 2caa9b73c577..fe2f1a8412b7 100644 --- a/drivers/regulator/tps65910-regulator.c +++ b/drivers/regulator/tps65910-regulator.c @@ -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, }; |