know the board model from uboot

    Hello,


    Is it possible to know the board and revision from the uboot? It is because my yocto must work in several revisions and each one requires a different dtb. The variable board_name does not exist in this uboot.


    U-Boot 2018.03 (Sep 21 2022 - 16:43:03 +0000) for F&S


    CPU: Freescale i.MX6Q rev1.3, 996 MHz (running at 792 MHz)

    CPU: Extended Commercial temperature grade (-20C to 105C)

    Reset: WDOG

    Board: armStoneA9 Rev 1.10 (LAN, 4x DRAM)

    I2C: ready

    DRAM: 1 GiB

    NAND: 256 MiB

    MMC: FSL_SDHC: 0

    Loading Environment from NAND... OK

    In: serial

    Out: serial

    Err: serial

    Net: FEC [PRIME]

    Normal Boot

  • alfred

    Changed the title of the thread from “known board from uboot” to “know the board model from uboot”.

    The board name is available in variable $platform in U-Boot. See chapter 5.6.2 in the Linux-on-F&S-Boards documentation:


    https://www.fs-net.de/filelice…fileid=11938&locale=en_US


    There is even the variable $bootfdt that typically holds the name oft the right device tree to load.


    Unfortunately the board revision is not available in U-Boot as a variable. It is known internally, but we do not set a variable with it. In Linux, it is available under /sys/bdinfo/board_revision. So either you can try to stay with one device tree and make the differences later in Linux, or you have to manually set an according variable in U-Boot when you install the board. For example directly set variable boardfdt to the right device tree name, depending on which board revision you are on.


    Your F&S Support Team

    F&S Elektronik Systeme GmbH
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