dietpi-installer: Add user overlay for SPI1_1

Temporary implementation for testing. Long-term, we will add it to the kernel package.

Author: MichaIng

.build/images/dietpi-installer

@@ -1237,6 +1237,43 @@ _EOF_
 				G_CONFIG_INJECT 'user_overlays=' 'user_overlays=dietpi-usb-otg' /boot/dietpiEnv.txt
 				G_EXEC apt-mark auto device-tree-compiler
 
+			elif (( $G_HW_MODEL == 83 ))
+			then
+				G_AGI device-tree-compiler
+				G_EXEC mkdir -p /boot/overlay-user
+				cat << '_EOF_' > /boot/overlay-user/dietpi-spi1_1.dts
+/dts-v1/;
+/plugin/;
+/ {
+	compatible = "allwinner,sun50i-h616";
+	fragment@0 {
+		target-path = "/aliases";
+		__overlay__ {
+			spi1 = "/soc/spi@5011000";
+		};
+	};
+	fragment@1 {
+		target = <&spi1>;
+		__overlay__ {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			pinctrl-0 = <&spi1_pins>,<&spi1_cs1_pin>;
+			pinctrl-names = "default";
+			spidev1_1: spidev@1 {
+				compatible = "armbian,spi-dev";
+				reg = <1>;
+				spi-max-frequency = <1000000>;
+				status = "okay";
+			};
+			status = "okay";
+		};
+	};
+};
+_EOF_
+				G_EXEC dtc -I dts -O dtb -o /boot/overlay-user/dietpi-spi1_1.{dtbo,dts}
+				#G_CONFIG_INJECT 'user_overlays=' 'user_overlays=dietpi-spi1_1-otg' /boot/dietpiEnv.txt
+				G_EXEC apt-mark auto device-tree-compiler
+
 			# Workaround for NanoPi R1 failing boot: https://github.com/MichaIng/DietPi/issues/5927
 			elif (( $G_HW_MODEL == 48 ))
 			then