The tablet has a vibrator. Expose it via input subsystem (EV_FF). Please take a look. thank you and regards, Ondrej Jirman Ondrej Jirman (4): dt-bindings: input: gpio-vibrator: Don't require enable-gpios input: gpio-vibra: Allow to use vcc-supply alone to control the vibrator ARM: dts: sun8i-a83t-tbs-a711: Add support for the vibrator motor ARM: dts: sun8i-a83t-tbs-a711: Increase voltage on the vibrator .../devicetree/bindings/input/gpio-vibrator.yaml | 1 - arch/arm/boot/dts/sun8i-a83t-tbs-a711.dts | 9 +++++++-- drivers/input/misc/gpio-vibra.c | 3 ++- 3 files changed, 9 insertions(+), 4 deletions(-) -- 2.25.1