arm64: dts: qcom: c630: Expose LID events

The LID state can be read from GPIO 124 and the "tablet mode" from GPIO
95, expose these to the system using gpio-keys and mark the falling edge
of the LID state as a wakeup-source - to wake the system from suspend.
Tested-by: Steev Klimaszewski <steev@kali.org>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Link: https://lore.kernel.org/r/20201125060838.165576-1-bjorn.andersson@linaro.orgSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

arch/arm64/boot/dts/qcom/sdm850-lenovo-yoga-c630.dts

@@ -8,6 +8,8 @@
 /dts-v1/;
 
 #include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/gpio-keys.h>
+#include <dt-bindings/input/input.h>
 #include <dt-bindings/regulator/qcom,rpmh-regulator.h>
 #include <dt-bindings/sound/qcom,q6afe.h>
 #include <dt-bindings/sound/qcom,q6asm.h>
@@ -21,6 +23,27 @@ / {
 	aliases {
 		hsuart0 = &uart6;
 	};
+
+	gpio-keys {
+		compatible = "gpio-keys";
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&lid_pin_active>, <&mode_pin_active>;
+
+		lid {
+			gpios = <&tlmm 124 GPIO_ACTIVE_HIGH>;
+			linux,input-type = <EV_SW>;
+			linux,code = <SW_LID>;
+			wakeup-source;
+			wakeup-event-action = <EV_ACT_DEASSERTED>;
+		};
+
+		mode {
+			gpios = <&tlmm 95 GPIO_ACTIVE_HIGH>;
+			linux,input-type = <EV_SW>;
+			linux,code = <SW_TABLET_MODE>;
+		};
+	};
 };
 
 &adsp_pas {
@@ -456,6 +479,22 @@ wcd_intr_default: wcd_intr_default {
 		bias-pull-down;
 		drive-strength = <2>;
 	};
+
+	lid_pin_active: lid-pin {
+		pins = "gpio124";
+		function = "gpio";
+
+		input-enable;
+		bias-disable;
+	};
+
+	mode_pin_active: mode-pin {
+		pins = "gpio95";
+		function = "gpio";
+
+		input-enable;
+		bias-disable;
+	};
 };
 
 &uart6 {