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SK-AM62: How to compile only the necessary Device-Tree and create a fitImage.

K.Z
Expert 2440 points
Part Number: SK-AM62

Tool/software:

Hi All,

I believe that the Makefile, Makerules directory, and Rules.make exist in the Directory of the SDK (ti-processor-sdk-linux-am62xx-evm-11.00.09.04) currently in use.
When you run ‘make all’ using this Makefile, it executes all the MakeRules in the Makerules directory,
so I modified Rules.make (around the last line, MAKE_ALL_TARGETS)to execute only linux, linux-dtbs, ti-img-rogue-driver, linux-extras, and linux-extras-dtbs.
However, this still compiles all Device-Trees under board-support/ti-linux-kernel-6.12.17+git-ti/arch/arm64/boot/dts/ti and generates a fitimage.
Please advise on how to compile only the necessary Device-Trees and generate a fitImage.

Best Regards,

Ito

  • 0
    Expert 2440 points

    Hi All,

    Additional question.

    When you run ‘make all’,
    ... u-boot, linux, linux-dtbs, ti-img-rogue-driver, jailhouse, linux-extras, linux-extras-dtbs, u-boot-extras, etc.
    are compiled.
    Here, there are linux and linux-extras, linux-dtbs and linux-extras-dtbs, u-boot and u-boot-extras.
    I asked this question because I was unclear about the difference between these “extras”.

    Best Regards,

    Ito

  • +1
    TI__Intellectual 900 points

    Hi K.Z,



    To build an individual device tree file find the name of the dts file and replace the .dts extension with .dtb. Then run the following command:

    make DTC_FLAGS=-@ ARCH=arm64 CROSS_COMPILE="$CROSS_COMPILE_64" ti/<dt filename>.dtb

    For example, the AM64x EVM device tree file is named k3-am642-evm.dts. To build the device tree binary you would run:
    make DTC_FLAGS=-@ ARCH=arm64 CROSS_COMPILE="$CROSS_COMPILE_64" ti/k3-am642-evm.dtb


    The compiled device tree file with be located in arch/arm64/boot/dts/ti.

    (You should run the commands from the drirectory:-ti-processor-sdk-linux-am62xx-evm-11.00.09.04/board-support/ti-linux-kernel-6.12.17+git-ti)

    Note:-

    1. Before compiling set thecross compiler paths
      export CROSS_COMPILE_64="${SDK_INSTALL_DIR}/linux-devkit/sysroots/x86_64-arago-linux/usr/bin/aarch64-oe-linux/aarch64-oe-linux-"

    2. For more information you can refer the below path:-

       software-dl.ti.com/.../Foundational_Components_Kernel_Users_Guide.html

    3. The "extras" in the TI Processor SDK Linux build system (linux-extras, linux-extras-dtbs, u-boot-extras) refer to additional, often optional, components or configurations that extend the functionality of the base Linux kernel and U-Boot.