arm64: dts: qcom: sm6375-pdx225: Configure Samsung touchscreen

Add a pretty bog-standard-for-Xperias-for-the-past-3-years
touchscreen setup.

The OEM that built the Xperia 10 IV for SONY decided to use some
kind of a GPIO regulator that needs to be enabled at all times
for both the touch panel and the display panel to function.
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221115152727.9736-10-konrad.dybcio@linaro.org

arch/arm64/boot/dts/qcom/sm6375-sony-xperia-murray-pdx225.dts

@@ -108,6 +108,23 @@ &gpi_dma1 {
 	status = "okay";
 };
 
+&i2c8 {
+	clock-frequency = <400000>;
+	status = "okay";
+
+	touchscreen@48 {
+		compatible = "samsung,s6sy761";
+		reg = <0x48>;
+		interrupt-parent = <&tlmm>;
+		interrupts = <22 0x2008>;
+
+		vdd-supply = <&pm6125_l13>;
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&ts_int_default &ts_avdd_default>;
+	};
+};
+
 &pmk8350_adc_tm {
 	status = "okay";
 };
@@ -317,6 +334,20 @@ pmr735a_l7: l7 {
 
 &tlmm {
 	gpio-reserved-ranges = <13 4>;
+
+	ts_int_default: ts-int-default-state {
+		pins = "gpio22";
+		function = "gpio";
+		drive-strength = <8>;
+		bias-pull-up;
+	};
+
+	ts_avdd_default: ts-avdd-default-state {
+		pins = "gpio59";
+		function = "gpio";
+		drive-strength = <8>;
+		output-high;
+	};
 };
 
 &usb_1 {