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    SubjectRe: [ARM] Regression ? at91rm9200 machine-type
    Marc Pignat ha scritto:
    > Hi!
    > On Tuesday 26 August 2008, you wrote:
    >> Hi,
    >> I have a custom board equivalent to AT91RM9200DK.
    > If it is really equivalent, you can use the same MACH_TYPE, else you should
    > register another.

    I used the same MACH_TYPE.

    >> After commit
    >> 87fee013a23ad02821699aef5b76891b42959182
    >> [ARM] 4647/1: at91rm9200: Remove redundant machine-type verification
    >> and manipulation
    >> I cannot boot my board anymore.
    >> Some more details:
    >> - I tried booting from both U-Boot 1.1.6 and U-Boot 1.3.4
    >> - I compiled U-Boot using "at91rm9200dk_config"
    >> - On U-Boot bootargs=console=ttyS0,115200 mem=32M
    >> mtdparts=AT45DB642.spi0:-(filesystem) rootfstype=jffs2 root=/dev/mtdblock0
    >> - The .config of the kernel is in attachment
    >> I don't know if this is an actual regression or not (I'm not much
    >> skilled in machine-types/boot process).
    > The "default machine" selection is a *hack* for machines with a bootloader too
    > old, buggy or closed source.
    > The right fix is to change the MACH_TYPE that you've compiled in u-boot.
    >> However, it seems that the commit above, besides removing redundant
    >> machine type verification, removed the default machine type for
    >> unknown boards as well.
    > This is a cleanup patch, if the hack is not removed, bootloaders will *never*
    > be fixed...

    I see. Thank you for the explanations. Linux developers made things in
    the right way by removing redundant machine type verification.

    The bug is in U-Boot which passes the wrong mach type when compiled
    for the at91rm9200dk board.

    Many thanks for your quick answer.


    Ing. Claudio Scordino
    Software Engineer, PhD
    Tel. +39-050-5492050

    Evidence Srl
    Embedded Real-Time Solutions

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