mainboard/google/kahlee: Reset trackpad & touchscreen

AMD chips don't hold off a reset to the end of I2C transitions, so
devices on the i2c bus can be left in a bad state.  To avoid this,
make sure the trackpad and touchscreen chips get disabled
during boot.

TEST=build, reboot watch trackpad enable go low

Change-Id: Ie50f4a102249df79517da571a6e768dba804cd57
Signed-off-by: Martin Roth <>
Reviewed-by: Aaron Durbin <>
Reviewed-by: Raul Rangel <>
Reviewed-by: Paul Menzel <>
Tested-by: build bot (Jenkins) <>
1 file changed