arm64: dts: qcom: msm8998-xperia: Add RMI4 touchscreen support

All of the devices in the Sony Yoshino platform are using a Synaptics
RMI4-compatible touch IC with identical pins and supplies: enable the
I2C-5 bus and add the rmi4-i2c node along with the required pin
configurations.
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>
Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20210909123733.367248-2-angelogioacchino.delregno@somainline.org

arch/arm64/boot/dts/qcom/msm8998-sony-xperia-yoshino.dtsi

@@ -30,6 +30,15 @@ board_vbat: vbat-regulator {
 		regulator-boot-on;
 	};
 
+	touch_vddio_vreg: touch-vddio-vreg {
+		compatible = "regulator-fixed";
+		regulator-name = "touch_vddio_vreg";
+		startup-delay-us = <10000>;
+		gpio = <&tlmm 133 GPIO_ACTIVE_HIGH>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&ts_vddio_en>;
+	};
+
 	vph_pwr: vph-pwr-regulator {
 		compatible = "regulator-fixed";
 		regulator-name = "vph_pwr";
@@ -130,6 +139,42 @@ ramoops@ffc00000 {
 	};
 };
 
+&blsp1_i2c5 {
+	status = "okay";
+	clock-frequency = <355000>;
+
+	touchscreen@2c {
+		compatible = "syna,rmi4-i2c";
+		reg = <0x2c>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		interrupts-extended = <&tlmm 125 IRQ_TYPE_EDGE_FALLING>;
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&ts_int_n>;
+
+		vdd-supply = <&vreg_l28_3p0>;
+		vio-supply = <&touch_vddio_vreg>;
+
+		syna,reset-delay-ms = <220>;
+		syna,startup-delay-ms = <1000>;
+
+		rmi4-f01@1 {
+			reg = <0x01>;
+			syna,nosleep-mode = <1>;
+		};
+
+		rmi4-f11@11 {
+			reg = <0x11>;
+			syna,sensor-type = <1>;
+		};
+	};
+};
+
+&blsp1_i2c5_sleep {
+	bias-disable;
+};
+
 &blsp2_uart1 {
 	status = "okay";
 };
@@ -442,6 +487,21 @@ hall_sensor0_default: acc-cover-open {
 		drive-strength = <2>;
 		input-enable;
 	};
+
+	ts_int_n: ts-int-n {
+		pins = "gpio125";
+		function = "gpio";
+		drive-strength = <8>;
+		bias-pull-up;
+	};
+
+	ts_vddio_en: ts-vddio-en-default {
+		pins = "gpio133";
+		function = "gpio";
+		bias-disable;
+		drive-strength = <2>;
+		output-low;
+	};
 };
 
 /*