VAR-SOM-MX7 Yocto Jethro Build Linux out of tree

VAR-SOM-MX7 - Yocto Jethro Build Linux from source code

Toolchain installation for out of Yocto builds

Build the toolchain by:

$ cd ~/var-mx6ul-mx7-yocto-jethro
$ MACHINE=imx7-var-som DISTRO=fsl-imx-x11 source var-setup-release.sh -b build_x11
$ bitbake meta-ide-support
$ bitbake meta-toolchain

The output will be located at tmp/deploy/sdk/. On a 64 bit Ubuntu you will get:

tmp/deploy/sdk/fsl-imx-x11-glibc-x86_64-meta-toolchain-cortexa9hf-vfp-neon-toolchain-4.1.15-1.1.0.sh

Install the tools by running:

$ tmp/deploy/sdk/fsl-imx-x11-glibc-x86_64-meta-toolchain-cortexa9hf-vfp-neon-toolchain-4.1.15-1.1.0.sh

Reply to all defaults 'y'
The toolchain name depend on your build machine and may change.

Build Linux out of Yocto tree

Get the Linux source code:

$ cd ~/var-mx6ul-mx7-yocto-jethro
$ git clone https://github.com/varigit/linux-2.6-imx.git -b imx-rel_imx_4.1.15_1.2.0_ga-var01

Build the Linux kernel:

$ source /opt/fsl-imx-x11/4.1.15-1.1.0/environment-setup-cortexa9hf-vfp-neon-poky-linux-gnueabi

$ cd ~/var-mx6ul-mx7-yocto-jethro/linux-2.6-imx/
$ make mrproper
$ make imx7-var-som_defconfig

Build everything:
$ make -j4

Build zImage only:
$ make -j4 zImage

Build modules only:
$ make -j4 modules

Build device trees only:
$ make -j4 dtbs

Build only the device tree for VAR-SOM-MX7 with eMMC:
$ make -j4 imx7d-var-som-emmc.dtb

Build only the device tree for VAR-SOM-MX7 with NAND flash:
$ make -j4 imx7d-var-som-nand.dtb

Install the built kernel on an SD card

Copy the zImage and device trees to the SD card boot partition, and install the modules in the SD card rootfs partition.
Assuming the boot partition is mounted on /media/BOOT-VARMX7 and the rootfs partition is mounted on /media/rootfs:

$ sudo make ARCH=arm modules_install INSTALL_MOD_PATH=/media/rootfs
$ cp arch/arm/boot/zImage /media/BOOT-VARMX7
$ cp arch/arm/boot/dts/imx7*var*.dtb /media/BOOT-VARMX7