Re: sam460ex, sm501 incorrect device id with kernel >=linux-2.6.39
From: acrux_it@libero.it <hidden>
Date: 2011-11-29 01:00:34
Da: agust@denx.de Data: 28/11/2011 21.22 A: "acrux"[off-list ref] Cc: "Josh Boyer"<redacted>, <redacted> Ogg: Re: sam460ex, sm501 incorrect device id with kernel >=linux-2.6.39 On Mon, 28 Nov 2011 20:56:55 +0100 acrux [off-list ref] wrote: ...quoted
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 in include/linux/sm501.h by this commit. Since CONFIG_PPC32 is 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 using ioread32be() worked there. Your sm502 is on PCI bus I suppose. This issue needs to be fixed. 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
