From 2358b7763ee6673c0d08ddf9dcfe96e982e9b26f Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Tue, 10 Apr 2012 14:20:03 +0800 Subject: [PATCH] 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 Signed-off-by: Mark Brown --- drivers/regulator/max8997.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/regulator/max8997.c b/drivers/regulator/max8997.c index 89c93d8..db09244 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; -- 2.7.4