arm64: dts: msm8916-longcheer-l8150: Add touchscreen

L8150 has RMI4 compatible Synaptics touchscreen on
blsp_i2c5. It is powered by fixed regulator. Add
both to the device tree.
Reviewed-by: Stephan Gerhold <stephan@gerhold.net>
Signed-off-by: Nikita Travkin <nikitos.tr@gmail.com>
Link: https://lore.kernel.org/r/20201113175917.189123-2-nikitos.tr@gmail.comSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

arch/arm64/boot/dts/qcom/msm8916-longcheer-l8150.dts

@@ -5,6 +5,7 @@
 #include "msm8916-pm8916.dtsi"
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/input/input.h>
+#include <dt-bindings/interrupt-controller/irq.h>
 
 / {
 	model = "Longcheer L8150";
@@ -50,6 +51,52 @@ volume-up {
 			linux,code = <KEY_VOLUMEUP>;
 		};
 	};
+
+	reg_ctp: regulator-ctp {
+		compatible = "regulator-fixed";
+		regulator-name = "ctp";
+
+		regulator-min-microvolt = <2800000>;
+		regulator-max-microvolt = <2800000>;
+
+		gpio = <&msmgpio 17 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&ctp_pwr_en_default>;
+	};
+};
+
+&blsp_i2c5 {
+	status = "okay";
+
+	rmi4@20 {
+		compatible = "syna,rmi4-i2c";
+		reg = <0x20>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		interrupt-parent = <&msmgpio>;
+		interrupts = <13 IRQ_TYPE_EDGE_FALLING>;
+
+		vdd-supply = <&reg_ctp>;
+		vio-supply = <&pm8916_l6>;
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&tp_int_default>;
+
+		syna,startup-delay-ms = <10>;
+
+		rmi4-f01@1 {
+			reg = <0x1>;
+			syna,nosleep-mode = <1>; // Allow sleeping
+		};
+
+		rmi4-f12@12 {
+			reg = <0x12>;
+			syna,sensor-type = <1>; // Touchscreen
+		};
+	};
 };
 
 &blsp1_uart2 {
@@ -201,6 +248,14 @@ l18 {
 };
 
 &msmgpio {
+	ctp_pwr_en_default: ctp-pwr-en-default {
+		pins = "gpio17";
+		function = "gpio";
+
+		drive-strength = <2>;
+		bias-disable;
+	};
+
 	gpio_keys_default: gpio-keys-default {
 		pins = "gpio107";
 		function = "gpio";
@@ -209,6 +264,14 @@ gpio_keys_default: gpio-keys-default {
 		bias-pull-up;
 	};
 
+	tp_int_default: tp-int-default {
+		pins = "gpio13";
+		function = "gpio";
+
+		drive-strength = <2>;
+		bias-disable;
+	};
+
 	usb_vbus_default: usb-vbus-default {
 		pins = "gpio62";
 		function = "gpio";