netdev - Re: [PATCH] flexcan: disable bus error interrupts for the i.MX28

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Message-ID: <20121011014135.GA7374@shlinux2.ap.freescale.net>
Date:	Thu, 11 Oct 2012 09:41:38 +0800
From:	Dong Aisheng <b29396@...escale.com>
To:	Marc Kleine-Budde <mkl@...gutronix.de>
CC:	Wolfgang Grandegger <wg@...ndegger.com>,
	Shawn Guo <shawn.guo@...aro.org>,
	Linux Netdev List <netdev@...r.kernel.org>,
	Linux-CAN <linux-can@...r.kernel.org>,
	Hui Wang <jason77.wang@...il.com>
Subject: Re: [PATCH] flexcan: disable bus error interrupts for the i.MX28

On Wed, Oct 10, 2012 at 10:04:42PM +0200, Marc Kleine-Budde wrote:
> On 10/08/2012 09:59 AM, Dong Aisheng-B29396 wrote:
> [...]
> 
> >>>> Concerning the bug, I know that the i.MX35 does have it. Maybe other
> >>>> Flexcan cores than on the i.MX28 does *not* have it either. If you
> >>>> have a chance, please check on the P1010, i.MX6Q, i.MX51, i.MX53,
> >>>> etc.
> >>>
> >>> >From what I can tell, i.MX35, i.MX51 and i.MX53 use the same version,
> >>> so they should all have the bug.  And for i.MX6Q, since it uses a
> >>> newer version even than i.MX28, I would believe it's affected by the bug.
> >>> But I'm copying Dong who should have better knowledge about this to
> >>> confirm.
> >>
> >> Thank for clarification. I have a i.MX6Q board but without CAN adapter :(,
> >> unfortunately. Otherwise I would try it out myself.
> >>
> > How did you verify this issue?
> > I just checked our ic guy of flexcan, it seems he also had no sense of this issue.
> 
> Wolfgang added this table to the driver code, which is a very good idea.
> I've some (nitpicky) questions :)
> 
> > Below is some version info what I got:
> > Mx6s use FlexCAN3, with IP version 10.00.12.00
>     ^^^
> Is this core different from the mx6q?
Yes, it's a single core named i.MX6 Solo.
For details, please see:
http://www.freescale.com/webapp/sps/site/taxonomy.jsp?code=IMX6X_SERIES

> Has the flexcan on mx6 a glitch filter?
> 
Yes.

> > Mx53 use FlexCAN2 (with glitch filter), with IP version 03.00.00.00
> > Mx28 use FlexCAN2 (with glitch filter), with IP version 03.00.04.00
> > Mx35 use FlexCAN2 (without glitch filter) , with IP version 03.00.00.00
> > Mx25 use FlexCAN2 (without glitch filter), with IP version 03.00.00.00
> 
> Do you have access to the powerpc designs which have a flexcan core,
> too? I'm interested to complete the above table with powerpcs cores
> (p1010 and similar).
Sorry, we don't have access.

Regards
Dong Aisheng
> 
> Marc
> -- 
> Pengutronix e.K.                  | Marc Kleine-Budde           |
> Industrial Linux Solutions        | Phone: +49-231-2826-924     |
> Vertretung West/Dortmund          | Fax:   +49-5121-206917-5555 |
> Amtsgericht Hildesheim, HRA 2686  | http://www.pengutronix.de   |
> 



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