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

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Date:	Wed, 10 Oct 2012 22:04:42 +0200
From:	Marc Kleine-Budde <mkl@...gutronix.de>
To:	Dong Aisheng-B29396 <B29396@...escale.com>
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 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? Has the flexcan on mx6 a glitch
filter?

> 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).

Marc
-- 
Pengutronix e.K.                  | Marc Kleine-Budde           |
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