add support for allwinner T527 Avaota-A1 (#6495)

config/boards/avaota-a1.conf

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+# Allwinner Cortex-A55 octa core 2/4GB RAM SoC USB3 USB-C 2x GbE LCD
+BOARD_NAME="Avaota A1"
+BOARDFAMILY="sun55iw3-syterkit"
+BOARD_MAINTAINER=""
+KERNEL_TARGET="legacy"
+BOOT_FDT_FILE="allwinner/sun55i-t527-avaota-a1.dtb"
+SRC_EXTLINUX="yes"
+SRC_CMDLINE="earlycon=uart8250,mmio32,0x02500000 clk_ignore_unused initcall_debug=0 console=ttyAS0,115200 loglevel=8 cma=64M init=/sbin/init"
+BOOTFS_TYPE="fat"
+BOOTSIZE="256"
+SERIALCON="ttyAS0"
+declare -g SYTERKIT_BOARD_ID="avaota-a1" # This _only_ used for syterkit-allwinner extension
+
+function post_family_tweaks__avaota-a1() {
+    display_alert "Applying boot blobs"
+	cp -v "$SRC/packages/blobs/sunxi/sun50iw3/bl31.bin" "$SDCARD/boot/bl31.bin"
+	cp -v "$SRC/packages/blobs/sunxi/sun50iw3/scp.bin" "$SDCARD/boot/scp.bin"
+	cp -v "$SRC/packages/blobs/sunxi/sun50iw3/splash.bin" "$SDCARD/boot/splash.bin"
+	
+    display_alert "Applying wifi firmware"
+        pushd "$SDCARD/lib/firmware"
+        ln -s "aic8800/SDIO/aic8800D80" "aic8800d80" # use armbian-firmware
+        popd
+}

config/sources/families/sun55iw3-syterkit.conf

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+#
+# SPDX-License-Identifier: GPL-2.0
+#
+# Copyright (c) 2013-2023 Igor Pecovnik, igor@armbian.com
+#
+# This file is a part of the Armbian Build Framework
+# https://github.com/armbian/build/
+#
+
+ARCH="arm64"
+
+LINUXFAMILY="sun55iw3-syterkit"
+enable_extension "syterkit-allwinner"
+
+case "${BRANCH}" in
+
+	legacy)
+		KERNELSOURCE='https://github.com/AvaotaSBC/linux.git'
+		# This is Allwinner's new BSP kernel,
+		# which consists of a specific version of the mainline kernel source code and a folder containing BSP driver source code files.
+		KERNELBRANCH="branch:linux-5.15"
+		declare -g KERNEL_MAJOR_MINOR="5.15"
+		KERNELPATCHDIR="sun55iw3-syterkit-${BRANCH}"
+		LINUXCONFIG="linux-sun55iw3-syterkit-${BRANCH}"
+
+		;;
+
+esac
+
+write_uboot_platform() {
+	display_alert "The sun55iw3 platform does not have mainline or vendor u-boot available for booting Armbian."
+	display_alert "Instead, Syterkit is used as the bootloader: https://github.com/YuzukiHD/SyterKit"
+}

extensions/syterkit-allwinner.sh

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+#
+# SPDX-License-Identifier: GPL-2.0
+# This file is a part of the Armbian Build Framework https://github.com/armbian/build/
+
+# This writes the SyterKit bootloader img to the image.
+function post_umount_final_image__write_syterkit_to_image() {
+	display_alert "Finding SyterKit latest version" "from GitHub" "info"
+
+	# Find the latest version of SyterKit from GitHub, using JSON API, curl and jq.
+	declare api_url="https://api.github.com/repos/YuzukiHD/SyterKit/releases/latest"
+	declare latest_version
+	latest_version=$(curl -s "${api_url}" | jq -r '.tag_name')
+	display_alert "Latest version of SyterKit is" "${latest_version}" "info"
+
+	# Prepare the cache dir
+	declare syterkit_cache_dir="${SRC}/cache/syterkit"
+	mkdir -p "${syterkit_cache_dir}"
+
+	declare syterkit_img_filename="${SYTERKIT_BOARD_ID}.tar.gz"
+	declare -g -r syterkit_img_path="${syterkit_cache_dir}/${syterkit_img_filename}"
+	display_alert "SyterKit image path" "${syterkit_img_path}" "info"
+
+	declare download_url="https://github.com/YuzukiHD/SyterKit/releases/download/${latest_version}/${syterkit_img_filename}"
+
+	# Download the image (with wget) if it doesn't exist; download to a temporary file first, then move to the final path.
+	if [[ ! -f "${syterkit_cache_dir}/${SYTERKIT_BOARD_ID}/extlinux_boot/extlinux_boot_bin_card.bin" ]]; then
+		display_alert "Downloading SyterKit image" "${download_url}" "info"
+		declare tmp_syterkit_img_path="${syterkit_img_path}.tmp"
+		run_host_command_logged wget -O "${tmp_syterkit_img_path}" "${download_url}"
+		run_host_command_logged mv -v "${tmp_syterkit_img_path}" "${syterkit_img_path}"
+		display_alert " Decompressing SyterKit image to" "${syterkit_img_path}/${SYTERKIT_BOARD_ID}" "info"
+		mkdir -p ${syterkit_cache_dir}/${SYTERKIT_BOARD_ID}
+		run_host_command_logged tar -zxvf ${syterkit_img_path} -C ${syterkit_cache_dir}/${SYTERKIT_BOARD_ID}
+	else
+		display_alert "SyterKit image already downloaded, using it" "${syterkit_img_path}" "info"
+	fi
+
+	display_alert " Writing SyterKit image" "${syterkit_img_path} to ${LOOP}" "info"
+	dd if="${syterkit_cache_dir}/${SYTERKIT_BOARD_ID}/extlinux_boot/extlinux_boot_bin_card.bin" of="${LOOP}" bs=1k conv=notrunc seek=8
+}