From: David Lechner Date: Fri, 20 Jul 2018 20:19:44 +0000 (-0500) Subject: power: supply: lego_ev3_battery: fix Vce offset X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=9c7272412bc556f6af2a89e0f1660dacb44e3b1d;p=linux.git power: supply: lego_ev3_battery: fix Vce offset This fixes the value that accounts for the Vce of a transistor in the LEGO MINDSTORMS EV3 power supply driver. The old value (200mV) was the max value from the data sheet. After testing, the actual value has been found to be 50mV. By using 50mV we get a more accurate voltage indication. Signed-off-by: David Lechner Signed-off-by: Sebastian Reichel --- diff --git a/drivers/power/supply/lego_ev3_battery.c b/drivers/power/supply/lego_ev3_battery.c index 6e3b3e384172b..1ae3710909b78 100644 --- a/drivers/power/supply/lego_ev3_battery.c +++ b/drivers/power/supply/lego_ev3_battery.c @@ -52,7 +52,7 @@ static int lego_ev3_battery_get_property(struct power_supply *psy, return ret; val->intval *= 2000; - val->intval += 200000; + val->intval += 50000; /* plus adjust for shunt resistor drop */ ret = iio_read_channel_processed(batt->iio_i, &val2);