iMX6 TinyRex Ultra U-Boot

U-boot is a bootloader responsible for hardware initialization, loading and booting linux kernel. It is also used for module flashing.

Build

Set toolchain

Export toolchain variables for every related terminal session.

Initial steps

Create working directory

mkdir -pv ~/workdir/imx6/bootloader/

U-Boot v2015.04

Download & Extract source code

cd ~/workdir/imx6/bootloader/
git clone -b uboot-imx-v2015.04 --single-branch https://github.com/voipac/uboot-imx uboot-imx-v2015.04-rex
cd uboot-imx-v2015.04-rex

Compile

Output file is called u-boot.imx

Compiling for SD3 and Linux/Yocto

cd ~/workdir/imx6/bootloader/uboot-imx-v2015.04-rex
make distclean
make mx6tinyrexultra_config
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi-
cp -av u-boot.imx /srv/tftp/imx6/u-boot-imx6-tinyrexultra.imx

Compiling for SD3 and Android 7.x

cd ~/workdir/imx6/bootloader/uboot-imx-v2015.04-rex
make distclean
make mx6tinyrexultraandroid_config
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi-
cp -av u-boot.imx /srv/tftp/imx6/u-boot-imx6-tinyrexultraandroid.imx

Compiling for SPI1 and Linux/Yocto

cd ~/workdir/imx6/bootloader/uboot-imx-v2015.04-rex
make distclean
make mx6tinyrexultrarecovery_config
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi-
cp -av u-boot.imx /srv/tftp/imx6/u-boot-imx6-tinyrexultrarecovery.imx

Compiling for SATA

cd ~/workdir/imx6/bootloader/uboot-imx-v2015.04-rex
make distclean
make mx6tinyrexultrasata_config
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi-
cp -av u-boot.imx /srv/tftp/imx6/u-boot-imx6-tinyrexultrasata.imx