Messages in this thread Patch in this message | | | Subject | [PATCH 1/2] regulator: max8997: Use simple equation to get selector | From | Axel Lin <> | Date | Tue, 03 Apr 2012 23:20:00 +0800 |
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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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