bq27x00: Improve temperature property precession

This patch improves the precession of the temperature property of the
bq27x00 driver.
By dividing before multiplying the current code effectively cuts of the
last decimal digit. This patch fixes it by multiplying before dividing.

Signed-off-by: Lars-Peter Clausen <[email protected]>
Acked-by: Rodolfo Giometti <[email protected]>
Tested-by: Grazvydas Ignotas <[email protected]>

diff --git a/drivers/power/bq27x00_battery.c b/drivers/power/bq27x00_battery.c
index bb043f93cead8a2822b3b2e8814be032a32b683b..4f7465999c865823ec1daa694fc54733dccede56 100644 (file)
--- a/drivers/power/bq27x00_battery.c
+++ b/drivers/power/bq27x00_battery.c
@@ -109,7 +109,7 @@ static int bq27x00_battery_temperature(struct bq27x00_device_info *di)
        if (di->chip == BQ27500)
                return temp - 2731;
        else
-               return ((temp >> 2) - 273) * 10;
+               return ((temp * 5) - 5463) / 2;
 }
 
 /*