arm64: dts: qcom: msm8994-kitakami: Add Synaptics RMI touchscreen

All Kitakami phones use Synaptics RMI4 touchscreens
attached to the same i2c bus. Configure and enable it.
Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Link: https://lore.kernel.org/r/20210118162432.107275-6-konrad.dybcio@somainline.orgSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

arch/arm64/boot/dts/qcom/msm8994-sony-xperia-kitakami-karin.dts

@@ -41,3 +41,5 @@ &pm8994_l25 {
 };
 
 /delete-node/ &pm8994_l32;
+/* Z4 tablets use a different touchscreen. */
+/delete-node/ &touchscreen;

arch/arm64/boot/dts/qcom/msm8994-sony-xperia-kitakami.dtsi

@@ -147,7 +147,34 @@ &blsp_i2c5 {
 &blsp_i2c6 {
 	status = "okay";
 
-	/* Synaptics touchscreen */
+	touchscreen: rmi4-i2c-dev@2c {
+		compatible = "syna,rmi4-i2c";
+		reg = <0x2c>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		interrupt-parent = <&tlmm>;
+		interrupts = <42 IRQ_TYPE_EDGE_FALLING>;
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&ts_int_active &ts_reset_active>;
+
+		vdd-supply = <&pm8994_l22>;
+		vio-supply = <&pm8994_s4>;
+
+		syna,reset-delay-ms = <220>;
+		syna,startup-delay-ms = <220>;
+
+		rmi4-f01@1 {
+			reg = <0x01>;
+			syna,nosleep-mode = <1>;
+		};
+
+		rmi4-f11@11 {
+			reg = <0x11>;
+			syna,sensor-type = <1>;
+		};
+	};
 };
 
 &blsp1_uart2 {
@@ -433,3 +460,19 @@ &sdhc1 {
 	 * vqmmc-supply = <&pm8994_s4>;
 	 */
 };
+
+&tlmm {
+	ts_int_active: ts-int-active {
+		pins = "gpio42";
+		drive-strength = <2>;
+		bias-disable;
+		input-enable;
+	};
+
+	ts_reset_active: ts-reset-active {
+		pins = "gpio109";
+		drive-strength = <2>;
+		bias-disable;
+		output-low;
+	};
+};