arm64: dts: qcom: msm8916-wingtech-wt88047: Add touchscreen

The Xiaomi Redmi 2 has a FocalTech touchscreen. The exact model is
not mentioned anywhere, but it works just fine with the mainline
edt-ft5x06 driver when using the "edt,edt-ft5506" compatible.
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Link: https://lore.kernel.org/r/20210712133735.318250-2-stephan@gerhold.netSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

arch/arm64/boot/dts/qcom/msm8916-wingtech-wt88047.dts

@@ -42,6 +42,30 @@ usb_id: usb-id {
 	};
 };
 
+&blsp_i2c5 {
+	status = "okay";
+
+	touchscreen@38 {
+		/* Likely some other model but works just fine with this one */
+		compatible = "edt,edt-ft5506";
+		reg = <0x38>;
+
+		interrupt-parent = <&msmgpio>;
+		interrupts = <13 IRQ_TYPE_EDGE_FALLING>;
+
+		reset-gpios = <&msmgpio 12 GPIO_ACTIVE_LOW>;
+
+		vcc-supply = <&pm8916_l17>;
+		iovcc-supply = <&pm8916_l6>;
+
+		touchscreen-size-x = <720>;
+		touchscreen-size-y = <1280>;
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&touchscreen_default>;
+	};
+};
+
 &blsp1_uart2 {
 	status = "okay";
 };
@@ -198,6 +222,22 @@ gpio_keys_default: gpio-keys-default {
 		bias-pull-up;
 	};
 
+	touchscreen_default: touchscreen-default {
+		pins = "gpio13";
+		function = "gpio";
+
+		drive-strength = <2>;
+		bias-pull-up;
+
+		reset {
+			pins = "gpio12";
+			function = "gpio";
+
+			drive-strength = <2>;
+			bias-disable;
+		};
+	};
+
 	usb_id_default: usb-id-default {
 		pins = "gpio110";
 		function = "gpio";