SPRACO0 August 2019 AM6526 , AM6528 , AM6546 , AM6548
NOTE
Review the <Android_FS>/device/ti/<board>/fastboot.sh for exact images to copy into flashing directory.
AM5
cd ~/ti-processor-sdk-android-beagle_x15-<version>/board-support/
cp -rv prebuilt-images emmc_files
cp -v ./aosp-<version>/out/target/product/beagle_x15/{boot.img,boot_fit.img,recovery.img,system.img,userdata.img,vendor.img} emmc_files
cp -v ./aosp-<version>/device/ti/beagle_x15/fastboot.sh emmc_files
cp -v ./aosp-<version>/out/host/linux-x86/bin/{simg2img,mkbootimg,fastboot,adb} emmc_files
cp -v ./linux-<version>/arch/arm/boot/zImage emmc_files/zImage-beagle_x15.bin
cp -v ./linux-<version>/arch/arm/boot/dts/am57*.dtb emmc_files
cp -v ./u-boot-<version>/MLO emmc_files
cp -v ./u-boot-<version>/u-boot.img emmc_files
AM6
cd ~/ti-processor-sdk-android-am65xx-evm-<version>/board-support/
cp -rv prebuilt-images emmc_files
cp -v ./aosp-<version>/out/target/product/am65xevm/{boot_fit.img,system.img,userdata.img,vendor.img} emmc_files
cp -v ./aosp-<version>/device/ti/am65xevm/fastboot.sh emmc_files
cp -v ./aosp-<version>/out/host/linux-x86/bin/{simg2img,mkbootimg,fastboot,adb} emmc_files
cp -v ./aosp-<version>/out/host/linux-x86/lib64/{libc++.so,libcutils.so,liblog.so,libselinux.so,libpcre2.so} emmc_files
cp -v ./u-boot_build/a53/u-boot.img emmc_files
cp -v ./u-boot_build/a53/tispl.bin emmc_files
cp -v ./u-boot_build/r5/tiboot3.bin emmc_files
$ sudo picocom -b 115200 /dev/ttyUSB0
=> fastboot 0
$ cd ~/ti-processor-sdk-android-<board>-<version>/board-support/emmc_files
$ sudo ./fastboot.sh; sudo ./fastboot reboot