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authorAxel Lin <axel.lin@gmail.com>2012-06-12 16:34:55 +0800
committerMark Brown <broonie@opensource.wolfsonmicro.com>2012-06-13 10:47:02 +0100
commit38c20eb23fb7b5505ac80595f18f4209abc19cd3 (patch)
treee5359e02888a3ce9166d66ddc199eba23aff9d0c /drivers/regulator/wm8400-regulator.c
parent3fe3a182adfeca84f39751af03c8571831a0877f (diff)
downloadlinux-38c20eb23fb7b5505ac80595f18f4209abc19cd3.tar.bz2
regulator: wm8400: Use wm8400_ldo_list_voltage instead of open code to verify selected voltage
Call wm8400_ldo_list_voltage() instead of open code to verify selected voltage falls within specified range. Use wm8400_ldo_list_voltage() here is less error prone. Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'drivers/regulator/wm8400-regulator.c')
-rw-r--r--drivers/regulator/wm8400-regulator.c22
1 files changed, 7 insertions, 15 deletions
diff --git a/drivers/regulator/wm8400-regulator.c b/drivers/regulator/wm8400-regulator.c
index f365795d51c2..9f9df8eef1a1 100644
--- a/drivers/regulator/wm8400-regulator.c
+++ b/drivers/regulator/wm8400-regulator.c
@@ -35,27 +35,19 @@ static int wm8400_ldo_map_voltage(struct regulator_dev *dev,
int min_uV, int max_uV)
{
u16 val;
+ int volt;
if (min_uV < 900000 || min_uV > 3300000)
return -EINVAL;
- if (min_uV < 1700000) {
- /* Steps of 50mV from 900mV; */
+ if (min_uV < 1700000) /* Steps of 50mV from 900mV; */
val = DIV_ROUND_UP(min_uV - 900000, 50000);
+ else /* Steps of 100mV from 1700mV */
+ val = DIV_ROUND_UP(min_uV - 1700000, 100000) + 15;
- if ((val * 50000) + 900000 > max_uV)
- return -EINVAL;
- BUG_ON((val * 50000) + 900000 < min_uV);
- } else {
- /* Steps of 100mV from 1700mV */
- val = DIV_ROUND_UP(min_uV - 1700000, 100000);
-
- if ((val * 100000) + 1700000 > max_uV)
- return -EINVAL;
- BUG_ON((val * 100000) + 1700000 < min_uV);
-
- val += 0xf;
- }
+ volt = wm8400_ldo_list_voltage(dev, val);
+ if (volt < min_uV || volt > max_uV)
+ return -EINVAL;
return val;
}