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regulator: tps62360: Simplify tps62360_set_voltage_time_sel implementation 

For linear mappings, we can use below equation to get the voltage difference
between new_selector and old_selector:

abs(new_selector - old_selector) * rdev->desc->uV_step

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Axel Lin 2012-06-08 14:35:32 +08:00 committed by Mark Brown
parent c70ad9dcf0
commit e08ef739fe
1 changed files with 3 additions and 10 deletions
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13
drivers/regulator/tps62360-regulator.c
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@ -179,17 +179,10 @@ 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 = regulator_list_voltage_linear(rdev, old_selector);
if (old_uV < 0)
return old_uV;
new_uV = regulator_list_voltage_linear(rdev, new_selector);
if (new_uV < 0)
return new_uV;
return DIV_ROUND_UP(abs(old_uV - new_uV), tps->change_uv_per_us);
return DIV_ROUND_UP(abs(new_selector - old_selector) *
rdev->desc->uV_step,
tps->change_uv_per_us);
}
static int tps62360_set_mode(struct regulator_dev *rdev, unsigned int mode)