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regulator: rc5t583: Simplify rc5t583_set_voltage_time_sel implementation

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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>
Acked-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Axel Lin 2012-06-07 16:38:09 +08:00 committed by Mark Brown
parent ee3ed6effd
commit 1acb645ebf
1 changed files with 3 additions and 11 deletions
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14
drivers/regulator/rc5t583-regulator.c
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@ -70,18 +70,10 @@ static int rc5t583_set_voltage_time_sel(struct regulator_dev *rdev,
unsigned int old_selector, unsigned int new_selector)
{
struct rc5t583_regulator *reg = 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),
reg->reg_info->change_uv_per_us);
return DIV_ROUND_UP(abs(new_selector - old_selector) *
rdev->desc->uV_step,
reg->reg_info->change_uv_per_us);
}