sam460ex, sm501 incorrect device id with kernel >=linux-2.6.39
Quoted 23 lines
Da: [email protected]
Data: 28/11/2011 21.22
A: "acrux"<[email protected]>
Cc: "Josh Boyer"<[email protected]>, <[email protected]>
Ogg: Re: sam460ex, sm501 incorrect device id with kernel >=linux-2.6.39On Mon, 28 Nov 2011 20:56:55 +0100
acrux <[email protected]> wrote:
...Quoted 3 lines
it seems to be an endianess issue but i didn't find when it was introduced. Really strange this kind of issue was never noticed bumping from 2.6.38.x to 2.6.39.x .
Look at commit
bf5f0019046d596d613caf74722ba4994e153899(video, sm501: add I/O functions for use on powerpc).
This is the issue, I think. Especially changes ininclude/linux/sm501.hby this commit. SinceCONFIG_PPC32is defined for canyonlands,ioread32be()is used to access the registers at PCI space which is wrong. The patch was tested on tqm5200 with sm501 connected on localbus, so usingioread32be()worked there. Your sm502 is on PCI bus I suppose. This issue needs to be fixed.
Quoted 3 lines
HTH,
Anatolij
hallo Anatolij,
you are absolutely right altought i don't have a skill to fix it. Indeed, this SM502 is located on PCI bus. Here a schema:
http://oi39.tinypic.com/34r9mw2.jpg
cheers,
--nico