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authorAxel Lin <axel.lin@gmail.com>2012-06-07 16:38:09 +0800
committerMark Brown <broonie@opensource.wolfsonmicro.com>2012-06-08 07:29:48 +0800
commit1acb645ebfe3a008e3c3350918d7d29974b1eaec (patch)
treec4d3684d90ee453dbfb6079c1235a89eed05680d /drivers/regulator/rc5t583-regulator.c
parentee3ed6effd8cc4c0cbfa35307cfc5fcec75b5e12 (diff)
downloadlinux-1acb645ebfe3a008e3c3350918d7d29974b1eaec.tar.bz2
regulator: rc5t583: Simplify rc5t583_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> Acked-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'drivers/regulator/rc5t583-regulator.c')
-rw-r--r--drivers/regulator/rc5t583-regulator.c14
1 files changed, 3 insertions, 11 deletions
diff --git a/drivers/regulator/rc5t583-regulator.c b/drivers/regulator/rc5t583-regulator.c
index 1d34e64a1307..332eae897dab 100644
--- a/drivers/regulator/rc5t583-regulator.c
+++ b/drivers/regulator/rc5t583-regulator.c
@@ -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);
}