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authorAxel Lin <axel.lin@gmail.com>2012-04-10 10:20:03 +0400
committerMark Brown <broonie@opensource.wolfsonmicro.com>2012-04-10 13:14:01 +0400
commit2358b7763ee6673c0d08ddf9dcfe96e982e9b26f (patch)
tree33c69d226ba54a28222071360e4f4cd17d5fce2b /drivers/regulator/max8997.c
parent0fa310ccabfe9034017e1b6780052d36fbd9f38f (diff)
downloadlinux-2358b7763ee6673c0d08ddf9dcfe96e982e9b26f.tar.xz
regulator: max8997: Use simple equation to get selector
It's more efficient to get the best selector by simple equation. Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'drivers/regulator/max8997.c')
-rw-r--r--drivers/regulator/max8997.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/regulator/max8997.c b/drivers/regulator/max8997.c
index 89c93d891140..db09244bb3ed 100644
--- a/drivers/regulator/max8997.c
+++ b/drivers/regulator/max8997.c
@@ -415,7 +415,7 @@ static inline int max8997_get_voltage_proper_val(
const struct voltage_map_desc *desc,
int min_vol, int max_vol)
{
- int i = 0;
+ int i;
if (desc == NULL)
return -EINVAL;
@@ -423,9 +423,10 @@ static inline int max8997_get_voltage_proper_val(
if (max_vol < desc->min || min_vol > desc->max)
return -EINVAL;
- while (desc->min + desc->step * i < min_vol &&
- desc->min + desc->step * i < desc->max)
- i++;
+ if (min_vol < desc->min)
+ min_vol = desc->min;
+
+ i = DIV_ROUND_UP(min_vol - desc->min, desc->step);
if (desc->min + desc->step * i > max_vol)
return -EINVAL;