Re: bernard 5.0.1 and beagle-xm rev c

[Darren Hart <dvhart@linux.intel.com>]

On 06/15/2011 10:18 AM, Robert Berger wrote:
> Hi,
> 
> On 06/15/2011 07:38 PM, Darren Hart wrote:
>>
>> For details on that effort and it's status, please see:
>>
>> https://lists.yoctoproject.org/pipermail/yocto/2011-June/001599.html
>>
> 
> I'm aware of this.
> 
>>
>> Both Koen and Jason K. have been helping to get the right bits merged
>> for the kernel. I had hoped to use mainline u-boot, but it appears we
>> may need at least a set of patches in support of Rev C.
> 
> What else is needed in addition to [2]?


Mainline u-boot appears to be adequate according to Jason.


> 
>>
>> The updated BSP will be released with 1.1. My patches and commits will
>> of course hit the list before then and you can build from master once
>> they arrive there. Within a week I suspect.
>>
> 
> I hope we'll have something which works without graphics on the Beagle
> XM - Rev C before October (1.1) - before summer would be great.
>


We won't be making another 1.0 release for the Beagleboard. The refresh
will come with 1.1. If you don't want to build master for the entire
image, you could build the linux-yocto recipe from master and install
uImage and the kernel modules over a bernard image. I should have all
the necessary bits committed in the next few days.


> This means, I would assume, gcc 4.6.0 fixes and the Beagle XM Rev C
> stuff. I did not dare to touch master due to the gcc 4.6.0 issues.
> Will this be fixed as well in the near future?


This is resolved for ARM with the following patch from mainline
linux-2.6.git:

commit 139540170d9d9b7ead3caaf540f161756b356d56
Author: Rabin Vincent <rabin@rab.in>
Date:   Wed Apr 27 21:07:28 2011 +0530

    USB: ehci: remove structure packing from ehci_def

    As pointed out by Arnd Bergmann, in include/linux/usb/ehci_def.h, struct
    ehci_caps is defined with __attribute__((packed)) for no good reason,
    and this triggers undefined behaviour when using ARM's readl() on
    pointers to elements of this structure:

    http://lkml.kernel.org/r/201102021700.20683.arnd@arndb.de

    The same problem exists with the other two structures in ehci_def.h too,
    so remove the __attribute__((packed)) from all of them.

    Cc: Arnd Bergmann <arnd@arndb.de>
    Signed-off-by: Rabin Vincent <rabin@rab.in>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>



> 
> I also played around with the patches in the meantime and
> 
> [1] for the x-loader
> [2] for for u-boot
> 
> seem to apply cleanly on whatever comes with bernard 5.0.1
> 
> [1]
> http://gitorious.org/x-loader/x-loader/commit/2efa178acd56d83c86210b5934895cfb9ea62125
> 
> [2]
> http://git.denx.de/?p=u-boot.git;a=commitdiff;h=f6e593bb1255d1e15201cb5dec8c95264489e729
> 
> The kernel patch against 2.6.37 seems to be a bit more involved.
> 
> Of course more code might be needed to make the Beagle XM Rev C work.
> 
> Regards,
> 
> Robert
> 
>> --
>> Darren Hart
>> Intel Open Source Technology Center
>> Yocto Project - Linux Kernel
> 
> ..."In my egotistical opinion, most people's C programs should be
> indented six feet downward and covered with dirt." - Blair P. Houghton
> 
> My public pgp key is available at:
> http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x90320BF1
> 
> 
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-- 
Darren Hart
Intel Open Source Technology Center
Yocto Project - Linux Kernel