From 9e39ef148777727360dabebacd70d60f3e0edc48 Mon Sep 17 00:00:00 2001 From: Sebastian Krzyszkowiak Date: Wed, 25 Nov 2020 05:46:17 +0100 Subject: [PATCH] power: supply: max17042_battery: Improve accuracy of current_now and current_avg readings Dividing 1562500 by r_sns value usually doesn't result in an integer. Signed-off-by: Sebastian Krzyszkowiak Signed-off-by: Sebastian Reichel --- drivers/power/supply/max17042_battery.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/power/supply/max17042_battery.c b/drivers/power/supply/max17042_battery.c index 2e9672fe4df1..86adccb0f32d 100644 --- a/drivers/power/supply/max17042_battery.c +++ b/drivers/power/supply/max17042_battery.c @@ -395,8 +395,8 @@ static int max17042_get_property(struct power_supply *psy, if (ret < 0) return ret; - val->intval = sign_extend32(data, 15); - val->intval *= 1562500 / chip->pdata->r_sns; + data64 = sign_extend64(data, 15) * 1562500ll; + val->intval = div_s64(data64, chip->pdata->r_sns); } else { return -EINVAL; } @@ -407,8 +407,8 @@ static int max17042_get_property(struct power_supply *psy, if (ret < 0) return ret; - val->intval = sign_extend32(data, 15); - val->intval *= 1562500 / chip->pdata->r_sns; + data64 = sign_extend64(data, 15) * 1562500ll; + val->intval = div_s64(data64, chip->pdata->r_sns); } else { return -EINVAL; }