meta-bsp-imx8mm/Documentation/linux_kernel_build.md

Building Linux Kernel for CompuLab's i.MX8M Mini products

Supported machines:

• mcm-imx8m-mini
• ucm-imx8m-mini

Define a MACHINE environment variable for the target product:

Machine	Command Line
mcm-imx8m-mini	export MACHINE=mcm-imx8m-mini
ucm-imx8m-mini	export MACHINE=ucm-imx8m-mini

Define the following environment variables:

Description	Command Line
NXP release name	export NXP_RELEASE=rel_imx_5.4.24_2.1.0
CompuLab branch name	export CPL_BRANCH=rel_imx_5.4.24_2.1.0-dev

Prerequisites

It is up to developer to setup arm64 build environment:

• Download the Linaro tool chain
• Set environment variables:

export ARCH=arm64
export CROSS_COMPILE=/usr/bin/aarch64-linux-gnu-

• Create a folder to organize the files:

mkdir imx8mm
cd imx8mm

• Download CompuLab BSP

git clone -b ${CPL_BRANCH} https://github.com/compulab-yokneam/meta-bsp-imx8mm.git
export PATCHES=$(pwd)/meta-bsp-imx8mm/recipes-kernel/linux/compulab/imx8mm

CompuLab Linux Kernel setup

git clone https://source.codeaurora.org/external/imx/linux-imx.git
git -C linux-imx checkout -b linux-compulab ${NXP_RELEASE}
git -C linux-imx am ${PATCHES}/*.patch

Compile the Kernel

make -C linux-imx ${MACHINE}_defconfig
make -C linux-imx