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Subject[PATCH 1/2] regulator: max8997: Use simple equation to get selector
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It's more efficient to get the best selector by simple equation.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
---
drivers/regulator/max8997.c | 9 +++++----
1 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/regulator/max8997.c b/drivers/regulator/max8997.c
index 6e7beee..de752da 100644
--- a/drivers/regulator/max8997.c
+++ b/drivers/regulator/max8997.c
@@ -416,7 +416,7 @@ 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;
@@ -424,9 +424,10 @@ 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;
--
1.7.5.4




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