sam460ex, sm501 incorrect device id with kernel >=linux-2.6.39

[Josh Boyer]

On Sun, Nov 27, 2011 at 11:37 AM, acrux <acrux_it at libero.it> wrote:
>
> Acube Sam460ex has SM502 as onboard video.
> I got this with any kernel newer than 2.6.38.x thus the framebuffer is lost too:
>
> root at sam4x0:~# diff dmesg-2.6.38.8 dmesg-2.6.39.4
> 1,2c1,3
> < Using PowerPC 44x Platform machine description
> < Linux version 2.6.38.8-Sam460ex (root at sam4x0) (gcc version 4.5.3 (CRUX PPC) ) #1 Fri Nov 11 22:07:53 CET 2011
> ---
>> Using Canyonlands machine description
>> Initializing cgroup subsys cpu

You seem to have switched from using the generic PowerPC 44x platform,
to using a Canyonlands kernel and/or DTB.  Not sure why that is, but
it's probably not helping your issues at all.

>> Linux version 2.6.39.4-Sam460ex (root at sam4x0) (gcc version 4.5.3 (CRUX PPC) ) #1 Fri Nov 11 19:06:02 CET 2011
> 17c18
> [cut]
> 161,179c165,167
> < sm501 0001:00:06.0: SM501 At f5480000: Version 050100c0, 64 Mb, IRQ 19

> ---
>> sm501 0001:00:06.0: incorrect device id c0000105

Something is reading the device ID in the wrong endian (and probably
everything else).

josh