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regulator: Simplify the code to get selector in isl6271a_set_voltage

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Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Axel Lin 2012-03-02 09:19:02 +08:00 committed by Mark Brown
parent 7b94791be6
commit 48ee1160a4
1 changed files with 3 additions and 11 deletions
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14
drivers/regulator/isl6271a-regulator.c
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@ -63,23 +63,15 @@ static int isl6271a_set_voltage(struct regulator_dev *dev,
unsigned *selector)
{
struct isl_pmic *pmic = rdev_get_drvdata(dev);
int vsel, err, data;
int err, data;
if (minuV < ISL6271A_VOLTAGE_MIN || minuV > ISL6271A_VOLTAGE_MAX)
return -EINVAL;
if (maxuV < ISL6271A_VOLTAGE_MIN || maxuV > ISL6271A_VOLTAGE_MAX)
return -EINVAL;
/* Align to 50000 mV */
vsel = minuV - (minuV % ISL6271A_VOLTAGE_STEP);
/* If the result fell out of [minuV,maxuV] range, put it back */
if (vsel < minuV)
vsel += ISL6271A_VOLTAGE_STEP;
/* Convert the microvolts to data for the chip */
data = (vsel - ISL6271A_VOLTAGE_MIN) / ISL6271A_VOLTAGE_STEP;
data = DIV_ROUND_UP(minuV - ISL6271A_VOLTAGE_MIN,
ISL6271A_VOLTAGE_STEP);
*selector = data;
mutex_lock(&pmic->mtx);