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authorDavid Lechner <david@lechnology.com>2018-07-20 23:19:44 +0300
committerSebastian Reichel <sebastian.reichel@collabora.co.uk>2018-07-23 00:33:43 +0300
commit9c7272412bc556f6af2a89e0f1660dacb44e3b1d (patch)
treef64457adabcb29593b72b54e53cb934a5998cc8c /drivers/power
parent6e92cecb1e1b073c0cbd1e0e0f338803e0df1924 (diff)
downloadlinux-9c7272412bc556f6af2a89e0f1660dacb44e3b1d.tar.xz
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 <david@lechnology.com> Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Diffstat (limited to 'drivers/power')
-rw-r--r--drivers/power/supply/lego_ev3_battery.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/power/supply/lego_ev3_battery.c b/drivers/power/supply/lego_ev3_battery.c
index 6e3b3e384172..1ae3710909b7 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);