BR2_aarch64=y
BR2_cortex_a72=y
BR2_ARM_FPU_VFPV4=y

BR2_TOOLCHAIN_BUILDROOT_CXX=y

BR2_SYSTEM_DHCP="eth0"

# Linux headers same as kernel, a 5.10 series
BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_10=y

BR2_LINUX_KERNEL=y
BR2_LINUX_KERNEL_CUSTOM_TARBALL=y
BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION="$(call github,raspberrypi,linux,b657cd2f27d9171b75c846f21e7b4bb581b3ed29)/linux-b657cd2f27d9171b75c846f21e7b4bb581b3ed29.tar.gz"
BR2_LINUX_KERNEL_DEFCONFIG="bcm2711"

# Build the DTB from the kernel sources
BR2_LINUX_KERNEL_DTS_SUPPORT=y
BR2_LINUX_KERNEL_INTREE_DTS_NAME="broadcom/bcm2711-rpi-cm4"

BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y

BR2_PACKAGE_RPI_FIRMWARE=y
BR2_PACKAGE_RPI_FIRMWARE_VARIANT_PI4=y

# Required tools to create the SD image
BR2_PACKAGE_HOST_DOSFSTOOLS=y
BR2_PACKAGE_HOST_GENIMAGE=y
BR2_PACKAGE_HOST_MTOOLS=y

# Required tool to flash CM4 eMMC memory
BR2_PACKAGE_HOST_RASPBERRYPI_USBBOOT

# Filesystem / image
BR2_TARGET_ROOTFS_EXT2=y
BR2_TARGET_ROOTFS_EXT2_4=y
BR2_TARGET_ROOTFS_EXT2_SIZE="120M"
# BR2_TARGET_ROOTFS_TAR is not set
BR2_ROOTFS_POST_BUILD_SCRIPT="board/raspberrypicm4io-64/post-build.sh"
BR2_ROOTFS_POST_IMAGE_SCRIPT="board/raspberrypicm4io-64/post-image.sh"
BR2_ROOTFS_POST_SCRIPT_ARGS="--add-miniuart-bt-overlay --aarch64"