Request for help with adding a driver to build os852

[Yioryos Asprobounitis]

Mikus 
did you apply the patch in http://dev.laptop.org/ticket/10297 in the kernel_xo1.spec? It solves the asm issue.
Patch, recompile the kernel install it (including headers and devel) and recompile your driver.
No other kernel comes close to OLPCs :-)

--- On Wed, 9/29/10, Mikus Grinbergs <mikus at bga.com> wrote:

> From: Mikus Grinbergs <mikus at bga.com>
> Subject: Request for help with adding a driver to build os852
> To: "Chris Ball" <cjb at laptop.org>
> Cc: "OLPC Devel" <devel at lists.laptop.org>, "fedora-olpc-list" <fedora-olpc-list at redhat.com>
> Date: Wednesday, September 29, 2010, 11:46 AM
> I need to add two drivers for
> external USB devices to os852.
> 
> I believe that creating a complete build from scratch for
> the XO-1,
> which includes the drivers I want, ought to work -- but I'm
> intimidated
> at jumping into git and kernel-building, just for a couple
> of drivers.
> [Besides, I don't want to be in the business of build
> maintenance.]
> 
> 
> So far, I'm trying to see if I can compile those drivers
> from source --
> but I'm having a HUGE struggle with the deficiencies of
> XO-1 package
> kernel-devel-2.6.31_xo1-20100823.1641.1.olpc.12d64069981699a.i586
> (it's missing header directories:  'arch/x86/include',
> 'include/trace',
> and 'include/asm-x86').
> 
> 
> But even when I've managed to compile the most recently
> available driver
> source and gotten an output module, 'modprobe' gives me
> "unknown symbol"
> errors, like the following (as logged in dmesg):
>  [139115.158397] uvcvideo: disagrees about version of
> symbol
> v4l_compat_translate_ioctl
>  [139115.158424] uvcvideo: Unknown symbol
> v4l_compat_translate_ioctl
>  [139115.163353] uvcvideo: disagrees about version of
> symbol video_devdata
>  [139115.163377] uvcvideo: Unknown symbol video_devdata
>  [139115.168912] uvcvideo: disagrees about version of
> symbol
> video_unregister_device
>  [139115.168932] uvcvideo: Unknown symbol
> video_unregister_device
>  [139115.170160] uvcvideo: disagrees about version of
> symbol
> video_device_alloc
>  [139115.170160] uvcvideo: Unknown symbol
> video_device_alloc
>  [139115.170160] uvcvideo: disagrees about version of
> symbol
> video_register_device
>  [139115.170160] uvcvideo: Unknown symbol
> video_register_device
>  [139115.170160] uvcvideo: disagrees about version of
> symbol video_usercopy
>  [139115.170160] uvcvideo: Unknown symbol video_usercopy
>  [139115.170160] uvcvideo: disagrees about version of
> symbol
> video_device_release
>  [139115.170160] uvcvideo: Unknown symbol
> video_device_release
> 
> And if I try to import the driver from (for instance)
> kernel-2.6.31.9-174.fc12.i686.rpm (the driver is in Fedora
> builds) into
> kernel-2.6.31_xo1-20100823.1641.1.olpc.12d64069981699a.i586
> (the driver
> is NOT in olpc builds) - I get "Invalid module format" from
> the os852
> modprobe, even if I invoke it with 'modprobe --force'.
> 
> 
> I'm asking that someone please tell me which Fedora kernel
> package comes
> closest to the XO-1 os852 kernel package - so I can go
> exploring for
> differences.  I also suspect that the driver source
> code I used is not
> the same as the driver source code Fedora used -- do I have
> to look in
> Fedoraproject git for the driver source code to try to
> compile ?
> 
> 
> Thanks - help would be greatly appreciated,  mikus
> 
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