arm64: dts: rockchip: enable touchpad button for rk3399-gru-kevin

Adding the linux,gpio-keymap entry also has
the side-effect of making the driver register
the touchpad as a touchpad rather than another
touchscreen.

The index for BTN_LEFT was found by trial and error.

Signed-off-by: Emil Renner Berthing <kernel@esmil.dk>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

1 files changed, 4 insertions, 0 deletions

diff --git a/arch/arm64/boot/dts/rockchip/rk3399-gru-kevin.dts b/arch/arm64/boot/dts/rockchip/rk3399-gru-kevin.dts
index a3d3cea7dc4f..0384e3121f18 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-gru-kevin.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3399-gru-kevin.dts
@@ -249,6 +249,10 @@ ap_i2c_dig: &i2c2 {
                 pinctrl-0 = <&trackpad_int_l>;
                 interrupt-parent = <&gpio1>;
                 interrupts = <4 IRQ_TYPE_LEVEL_LOW>;
+                linux,gpio-keymap = <KEY_RESERVED
+                                     KEY_RESERVED
+                                     KEY_RESERVED
+                                     BTN_LEFT>;
                 wakeup-source;
         };
 };