kernel

Before building kernel for Odroid Go advance on Ubuntu desktop, you need to install the required packages as follows.

host

$ sudo apt-get update &&\
sudo apt-get install -y git lzop build-essential gcc \
    bc libncurses5-dev libc6-i386 lib32stdc++6 zlib1g:i386

Download toolchain and extract the tarball to /opt/toolchains/.

host

$ sudo mkdir -p /opt/toolchains &&\
wget https://releases.linaro.org/components/toolchain/binaries/6.3-2017.05/aarch64-linux-gnu/gcc-linaro-6.3.1-2017.05-x86_64_aarch64-linux-gnu.tar.xz &&\
sudo tar Jxvf gcc-linaro-6.3.1-2017.05-x86_64_aarch64-linux-gnu.tar.xz -C /opt/toolchains/

To set up information for compilation, paste below lines to $HOME/.bashrc.

host

export ARCH=arm64
export CROSS_COMPILE=aarch64-linux-gnu-
export PATH=/opt/toolchains/gcc-linaro-6.3.1-2017.05-x86_64_aarch64-linux-gnu/bin/:$PATH

Execute the below command to apply the setting.

host

$ source ~/.bashrc

Check the toolchain version to confirm compatibility.

host

$ aarch64-linux-gnu-gcc -v
...
COLLECT_LTO_WRAPPER=/opt/toolchains/gcc-linaro-6.3.1-2017.02-x86_64_aarch64-linux-gnu/bin/../libexec/gcc/aarch64-linux-gnu/6.3.1/lto-wrapper
...
gcc version 6.3.1 20170109 (Linaro GCC 6.3-2017.02)

$ git clone https://github.com/hardkernel/linux.git -b odroidgoA-4.4.y

If you use the latest kernel source codes of Hardkernel Github after December 2020,
use odroidgoa_defconfig.
https://github.com/hardkernel/linux/commit/6cd3fd65eb26aea3e2f005c8a2d0cfe382dcf5a8

$ cd linux
$ make odroidgoa_defconfig

Or with old version,

$ cd linux
$ make odroidgo2_defconfig

If memory and disk size are enough and it has no other tasks, run 'make -j $(expr $(expr $(nproc) \* 6) \/ 5)' instead of 'make' for quick compilation.

$ make [-j4]

Once kernel build is done, you will have Image and dtb files as following.

$ ls arch/arm64/boot/Image
 
arch/arm64/boot/Image

• rk3326-odroidgo2-linux.dtb : dtb for OGA rev1.0
• rk3326-odroidgo2-linux-v11.dtb : dtb for OGA-BE, rev1.1
• rk3326-odroidgo3-linux.dtb : dtb for OGS

$ ls arch/arm64/boot/dts/rockchip/rk3326-odroidgo*.dtb 
 
arch/arm64/boot/dts/rockchip/rk3326-odroidgo2-linux.dtb
arch/arm64/boot/dts/rockchip/rk3326-odroidgo2-linux-v11.dtb
arch/arm64/boot/dts/rockchip/rk3326-odroidgo3-linux.dtb

1. Plug the Boot-Device(eMMC or SD) into the USB memory CARD reader and Connect the USB memory CARD reader to your HOST PC(Linux OS).

2. Copy the Image and DT(rk3326-odroidgo2-linux.dtb & rk3326-odroidgo2-linux-v11.dtb) to the FAT partition(1st partition) in the Boot-Device.

host

$ mkdir -p mount
$ sudo mount /dev/sdc1 ./mount
$ sudo cp arch/arm64/boot/Image arch/arm64/boot/dts/rockchip/rk3326-odroidgo2-linux*.dtb ./mount && sync && sudo umount ./mount

3. Copy the driver modules to the EXT4 partition(2nd partition) in the Boot-Device.

host

$ sudo mount /dev/sdc2 ./mount
$ sudo make modules_install ARCH=arm64 INSTALL_MOD_PATH=./mount && sync && sudo umount ./mount
$ rm -rf mount

To detect HW revision automatically with a single OS image, the latest u-boot version has a detection logic using hwrev environment.

• hwrev 'v10' : ODROID-GO Advance 1st version (rev 1.0)
• hwrev 'v11' : ODROID-GO Advance Black Edition (rev 1.1)
• hwrev 'v10-go3' : ODROID-GO Super

https://github.com/hardkernel/u-boot/blob/odroidgoA-v2017.09/cmd/hwrev.c#L22

And here is a sample of boot.ini.

if test ${hwrev} = 'v11'; then
load mmc 1:1 ${dtb_loadaddr} rk3326-odroidgo2-linux-v11.dtb
elif test ${hwrev} = 'v10-go3'; then
load mmc 1:1 ${dtb_loadaddr} rk3326-odroidgo3-linux.dtb
else
load mmc 1:1 ${dtb_loadaddr} rk3326-odroidgo2-linux.dtb
fi

https://forum.odroid.com/viewtopic.php?f=187&t=38629&start=100#p292898

The Ubuntu ES Image (OS Image, v2.0) includes the logic of u-boot and boot.ini.
https://wiki.odroid.com/odroid_go_advance/os_image/ubuntu_es#v20

If you use a older Ubuntu ES Image, please run the following commands to update u-boot, boot.ini and kernel packages.

target

$ sudo apt update
$ sudo apt upgrade -y
$ sudo reboot