diff options
| author | Sebastian Krzyszkowiak <sebastian.krzyszkowiak@puri.sm> | 2020-11-25 05:46:17 +0100 |
|---|---|---|
| committer | Sebastian Reichel <sre@kernel.org> | 2020-11-30 01:14:42 +0100 |
| commit | 9e39ef148777727360dabebacd70d60f3e0edc48 (patch) | |
| tree | f373775d4cc56d435520090dba0bde99d3063186 /drivers/power | |
| parent | 4b0a56e692503692da6555337a697c17feabbb3e (diff) | |
| download | linux-9e39ef148777727360dabebacd70d60f3e0edc48.tar.bz2 | |
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 <sebastian.krzyszkowiak@puri.sm>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Diffstat (limited to 'drivers/power')
| -rw-r--r-- | drivers/power/supply/max17042_battery.c | 8 |
1 files 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; } |