U-Boot for Libre Computer AML-A311D-CC ‘Alta’ (A311D)
AML-A311D-CC is a Single Board Computer manufactured by Libre Computer Technology with the following specifications:
Amlogic A311D Arm Cortex-A53 dual-core + Cortex-A73 quad-core SoC
2 or 4GB LPDDR4 SDRAM
Gigabit Ethernet
HDMI 2.1 display
40-pin GPIO header
4 x USB 3.0 Host, 1 x USB 2.0 Type-C
eMMC 5.x SM Interface for Libre Computer Modules
microSD
Infrared receiver
Schematics are available on the manufacturer website.
U-Boot Compilation
$ export CROSS_COMPILE=aarch64-none-elf-
$ make aml-a311d-cc_defconfig
$ make
U-Boot Signing with Pre-Built FIP repo
$ git clone https://github.com/LibreELEC/amlogic-boot-fip --depth=1
$ cd amlogic-boot-fip
$ mkdir my-output-dir
$ ./build-fip.sh aml-a311d-cc /path/to/u-boot/u-boot.bin my-output-dir
Then write U-Boot to SD or eMMC with:
$ DEV=/dev/boot_device
$ dd if=fip/u-boot.bin.sd.bin of=$DEV conv=fsync,notrunc bs=512 skip=1 seek=1
$ dd if=fip/u-boot.bin.sd.bin of=$DEV conv=fsync,notrunc bs=1 count=440