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 <ker...@esmil.dk>
---
 arch/arm64/boot/dts/rockchip/rk3399-gru-kevin.dts | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3399-gru-kevin.dts 
b/arch/arm64/boot/dts/rockchip/rk3399-gru-kevin.dts
index 5c8621766908..1c58d12551f5 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-gru-kevin.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3399-gru-kevin.dts
@@ -278,6 +278,10 @@ 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;
        };
 };
-- 
2.14.2

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