BR2_arm=y BR2_cortex_a72=y BR2_ARM_FPU_NEON_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,24c8b0546a820222a1ebcfe606dfacb0e228c466)/linux-24c8b0546a820222a1ebcfe606dfacb0e228c466.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="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=y # 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/post-build.sh" BR2_ROOTFS_POST_IMAGE_SCRIPT="board/raspberrypicm4io/post-image.sh" BR2_ROOTFS_POST_SCRIPT_ARGS="--add-miniuart-bt-overlay"