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VAR-SOM-MX6 Yocto Jethro R4 Build u-boot out of tree

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VAR-SOM-MX6 - Yocto fsl-4.1.15_ga Jethro R4 U-Boot out of tree


1 Toolchain installation for out of Yocto builds

As an example of X11 build, Build the toolchain by:

$ cd ~/var-som-mx6-yocto-jethro
$ DISTRO=fsl-imx-x11 MACHINE=var-som-mx6 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-4.1.15-1.2.0.sh

Install the tools by running:

$ tmp/deploy/sdk/fsl-imx-x11-glibc-x86_64-meta-toolchain-cortexa9hf-vfp-neon-toolchain-4.1.15-1.2.0.sh

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

2 Build U-Boot out of Yocto tree

Note:
This is a single U-Boot image that supports all VAR-SOM-MX6 SOMs.
Obtain sources:
$ cd ~/var-som-mx6-yocto-jethro
$ git clone https://github.com/varigit/uboot-imx -b imx_v2015.04_4.1.15_1.1.0_ga_var01
  • Follow above procedure for installing the toolchain

Build U-Boot:

$ source /opt/fsl-imx-x11/4.1.15-1.2.0/environment-setup-cortexa9hf-vfp-neon-poky-linux-gnueabi
$ cd ~/var-som-mx6-yocto-jethro/uboot-imx/

clean tree:
$ make mrproper

Choose build for SD card or NAND flash:
$ make mx6var_som_sd_defconfig
or
$ make mx6var_som_nand_defconfig

Build U-Boot:
$ make -j4

3 Install the built U-Boot on an SD card

Flash U-Boot to the SD card (replace /dev/sdX with your correct device):

$ sudo dd if=SPL of=/dev/sdX bs=1K seek=1; sync
$ sudo dd if=u-boot.img of=/dev/sdX bs=1K seek=69; sync


If you want to use the SD card to flash the built U-Boot to NAND flash, then copy it to the appropriate location in the SD card:

$ sudo cp SPL /media/rootfs/opt/images/...
$ sudo cp u-boot.img /media/rootfs/opt/images/...

And eject the SD card gracefully from the host machine.

Note:
Refer to NAND Flash Burning for a complete description.