[meta-freescale] FlexCAN not working

[Wayne T. Schellekens]

Hi,

FlexCAN is also not working on SabreSDP board.

I normally follow this procedure (https://community.freescale.com/servlet/JiveServlet/previewBody/94887-102-1-6575/How%20to%20enable%20CAN%20bus%20on%20i.MX6Q%20SabreSD.pdf) , and it has worked in the past on my rev C SabreSDP board.

After I upgraded to dora branch, and applied my patch I now get an error in the ip link command:

root at imx6qsabresd:~# ip link set can0 up type can bitrate 1000000
ip: either "dev" is duplicate, or "type" is garbage

Any ideas what has changed? 
Thanks,
Wayne


-----Original Message-----
From: meta-freescale-bounces at yoctoproject.org [mailto:meta-freescale-bounces at yoctoproject.org] On Behalf Of Jose Mª Ferreiro
Sent: Friday, October 11, 2013 1:56 PM
To: meta-freescale at yoctoproject.org
Subject: Re: [meta-freescale] FlexCAN not working


El 11/10/2013 20:41, Eric Nelson escribió:
> Hi Jose,
>
> On 10/11/2013 11:15 AM, Jose Mª Ferreiro wrote:
>>
>> El 11/10/2013 17:16, Eric Nelson escribió:
>>> Hi Diego,
>>>
>>> On 10/11/2013 04:28 AM, diego wrote:
>>>> Hello everybody,
>>>>
>>>> I'm trying to test FlexCAN on Sabrelite imx6 board without success.
>>>> Those are the steps followed :
>>>>
>>>> 1) Comprobed that linux-imx has CAN drivers enable
>>>> 2) Added on the  image the packages:canutils,libsocketcan and 
>>>> iproute2
>>>> 3) Tested the Flex can with  canconfig and cantest.
>>>>
>>>> Everything seems  ok,  even I can see transmitted frames incremented.
>>>> However there's not singnal on the oscilloscope.
>>>>
>>>> I don't now why is not working. Any ideas or suggestions?
>>>>
>>>
>>> Can you forward your kernel version (/proc/version) and output of 
>>> /proc/cpuinfo?
>>>
>>> Some early versions of SABRE Lite used a discontinued Freescale CAN 
>>> PHY, and there's some code in board-mx6_nitrogen6x.c to detect which 
>>> is in use. If you're using the old board-mx6_sabrelite.c, that 
>>> detection code isn't present.
>> Hi Eric
>>
>> Below are the outputs you asked. But I compared board-...nitro to 
>> board-..sabrelite sources. Certainly nitrogen is configured for two 
>> transceivers while sabrelite is fixed to one of them. Our board, from 
>> Farnell element 14, has the TJA1040 transceiver. I think Sabrelite 
>> code is working like the other transceiver. However I am not finding 
>> the transceiver detection code :( . I keep trying :)
>>
>
> The detection code is defined in the link I forwarded earlier:
>     
> https://github.com/boundarydevices/linux-imx6/blob/boundary-imx_3.0.35
> _4.1.0/arch/arm/mach-mx6/board-mx6_nitrogen6x.c#L1382
>
>
> This board file can be used for both SABRE Lite and Nitrogen6X boards. 
> I suspect this includes those produced by Farnell.
>
> The board-mx6_sabrelite.c file is essentially un-maintained and 
> contains a reference to the old mc33902 PHY.
>
>> Thanks
>>
>> This is yocto master + linux-imx
>>
>
> You'll really want to use linux-boundary.
>
> Regards,
>
>
> Eric

Hi Eric

You are correct. I didn´t look well for it. It seems as it depends on a third GPIO signal to select one transceiver or the other. We will test it on monday.

I would like to use linux-boundary, wich was the default, but we have to change to linux-imx due to video issues that did not work on
linux-boundary: something about mfw_isink i think.

I readed about the two linux branches, boundary and imx, being merged for the board but we can not wait for it. So I suppose we will have to test and merge them by ourselves .. with your help :) Any recomendation are welcomed.

Thank you very much again
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