Re: [Xenomai] Availability of ARM adeos patch for 3.5 kernel, and RTDM SPI for iMX6 ?

[Thierry Bultel <thierry.bultel@wanadoo.fr>]

Le 24/08/2012 12:59, Gilles Chanteperdrix a écrit :
> On 08/24/2012 12:06 PM, Thierry Bultel wrote:
>
>> Hi,
>>
>> I noticed on git that the latest available patch for ARM is
>> ipipe-core-3.2.21-arm-1.patch,
>> that I assume, replaces the mxc pre+std+post mecanism, please tell me if
>> I am wrong.
>
> The pre+std+post mechanism is used to apply a patch for mainline kernel
> to the Freescale linux tree. If you want to use that tree, you always
> need that mechanism. ipipe-core-3.2.21-arm-1.patch is a patch for the
> mainline kernel.
Thanks for the clarification.
When you refer to Freescale linux tree, are you talking about

https://github.com/Freescale/linux-imx* *?

If yes, the latest version there is 3.5-rc7. 

The CPU module vendor is likely to base its BSP on a Freescale kernel, probably that one, so I am 
concerned about finding a matching patch to apply on.
What would you advise ? Taking in account what you mention below, is the backport from Freescale
3.5-rc7 to mainline 3.4 the most suitable solution, or a port of the adeos patch in the opposite way ?

Thanks

>
>> I would like to know is there is an estimated date for the availability
>> of the patch for the 3.5 kernel ?
>
> Due to lack of time, the next patch will probably be for 3.6. We already
> have support for 3.4 kernel, which you can use checking out:
> git://git.denx.de/ipipe.git
> for the kernel, and
> git://git.xenomai.org/xenomai-2.6.git
> for xenomai.
>
> Note that 3.4 is probably a good choice as it has been announced that it
> will be maintained for one year.
>
> Note that we have some unfinished business on imx6:
> - we have some random crashes, which I think are probably solved in 3.4
> (and need backporting in 3.2 and 3.0, either way)
> - we have some high latencies, I think they may be due to the bug
> discovered in this thread:
> http://lists.infradead.org/pipermail/linux-arm-kernel/2012-August/113087.html
>
> But I need to spend some time on the actual hardware to validate these
> hypotheses.
>
>> My last question is about SPI, will an RTDM driver for the SPI of the
>> iMX6 be available ?
>
> Sure, if someone writes it, we will be happy to merge it in xenomai sources.
>