From: Wolfgang Grandegger <wg@grandegger.com>
To: Thierry Bultel <thierry.bultel@wanadoo.fr>
Cc: "Xenomai@xenomai.org" <Xenomai@xenomai.org>
Subject: Re: [Xenomai] [PATCH] rtcan: driver for the Advantech PCI cards
Date: Tue, 16 Oct 2012 12:41:56 +0200 [thread overview]
Message-ID: <507D39F4.8040905@grandegger.com> (raw)
In-Reply-To: <507D32E3.9070402@wanadoo.fr>
On 10/16/2012 12:11 PM, Thierry Bultel wrote:
> Le 11/10/2012 09:08, Gilles Chanteperdrix a écrit :
>> On 10/11/2012 08:43 AM, Thierry Bultel wrote:
>>
>>> Why v3.2 from Freescale? For the SabreLite or Nitrohen6x I know about
>>>>> 3.0.36 from Freescale (rel_imx_3.0.35_12.09.02 from
>>>>> git.freecale.com/linux-2.6) or, much better, mainline Linux 3.4.
>>>>> Concerning the iPipe patches I think you have currently no other
>>>>> choice.
>>>
>>> In both cases, (latest one from Freescale, or 3.4 from mainline)
>>> there is currently
>>> no available matching ipipe patch.
>>> I do not know if the latest kernel from mainline will fit for the
>>> reference board that I will receive.
>>>
>>> I do not realize the amount of work for porting either
>>> - ipipe-core-3.2.21-arm.patch to 3.4 (mainline)
>>> or
>>> - adeos-ipipe-3.0.43-* to the latest (which one ?) kernel from Freescale
>>>
>>> About that latest option I am a little bit puzzled.
>>> Namely from what I know, Freescale kernels are on
>>>
>>> http://git.freescale.com/git/cgit.cgi/imx/linux-2.6-imx.git/refs/heads
>>> and the latest published 3.x kernel is ... a 3.0.15_12 that has not
>>> moved for months.
>>> Thanks for clarifying
>>
>> The 3.4 patch is working for arm, I still have some issues, but it is
>> already usable:
>>
>> git://git.xenomai.org/ipipe-gch.git branch for-core-3.4
>>
>> For now, you simply have to avoid THUMB user-space binaries (but you can
>> compile the kernel with CONFIG_THUMB2_KERNEL, and it results in lower
>> latencies from what I measured).
>>
>> It works on the sabre board "out-of-the-box". I suspect, starting with
>> core-3.4, we have no additional work to do to work with any cortex a9
>> based processor (except, as I already said, for some old cortex a9
>> revisions without a global timer, but that is not the case of the imx6q
>> I tested).
>>
>
> AFAIK, my DevKit should finally come with a 3.0.35 kernel
> How difficult would it be to apply the adeos-ipipe-3.0.43- patches on it ?
> It is feasible ?
Very likely that kernel is based on Freescale's 3.0.35, which already
has Xenomai support. If so, the patches should apply without problems.
Wolfgang.
next prev parent reply other threads:[~2012-10-16 10:41 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <503227B5.9070002@basystemes.fr>
2012-08-20 12:35 ` [Xenomai] [PATCH] rtcan: driver for the Advantech PCI cards Thierry Bultel
2012-08-28 6:22 ` Gilles Chanteperdrix
2012-08-28 7:17 ` Wolfgang Grandegger
[not found] ` <503C758B.9000906@wanadoo.fr>
[not found] ` <503C7D77.2060209@grandegger.com>
[not found] ` <50744BD3.1030703@wanadoo.fr>
2012-10-09 19:34 ` Wolfgang Grandegger
2012-10-09 19:37 ` Gilles Chanteperdrix
2012-10-09 20:21 ` Thierry Bultel
2012-10-09 20:52 ` Gilles Chanteperdrix
2012-10-11 6:43 ` Thierry Bultel
2012-10-11 7:08 ` Wolfgang Grandegger
2012-10-11 7:21 ` Thierry Bultel
2012-10-11 7:08 ` Gilles Chanteperdrix
2012-10-16 10:11 ` Thierry Bultel
2012-10-16 10:41 ` Wolfgang Grandegger [this message]
2012-10-16 11:07 ` Thierry Bultel
2012-10-16 11:42 ` Wolfgang Grandegger
2012-10-11 6:58 ` Wolfgang Grandegger
2012-08-28 12:01 ` Gilles Chanteperdrix
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