Re: [ARM] Regression ? at91rm9200 machine-type

Marc Pignat
2008-08-26T12:43:24Z

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.

>
> 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...

Best regards

Marc