From: Gianluca <gmattiroli@midsx.ch>
To: linux-can@vger.kernel.org
Subject: Re: socketCAN mcp2515 - rx buffer overflow
Date: Thu, 8 Mar 2012 14:35:26 +0000 (UTC) [thread overview]
Message-ID: <loom.20120308T152308-549@post.gmane.org> (raw)
In-Reply-To: 4F58BE03.5030905@pengutronix.de
Marc Kleine-Budde <mkl <at> pengutronix.de> writes:
> Using an SPI attached CAN controller is a really bad choice. Try is
> upgrading to mx53, which has as far as I know one or even two internal
> flexcan cores, an option for you? Another option is to attach a local
> bus capable controller like the SJA1000 to your CPU, or use an USB
> dongle or a PCMCIA card.
>
> The next thing is the SPI driver on the (mainline) mx51. If I remember
> correctly the mainline kernel doesn't support DMA for the SPI driver
> yet. I don't know if the freescale kernel does. Depending on your kernel
> version there are some knobs to tune the PIO SPI driver, mainly to
> increase the priority of the SPI task.
>
> Last but not least, there is a not yet mainlined improved version of the
> mcp2515 driver around.
>
> regards, Marc
Ok, it does not sound to be stable and safe solution. Maybe using the SJA1000
would be a better choice for our project. Thanks for the help.
Gianluca
prev parent reply other threads:[~2012-03-08 14:35 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-08 13:09 socketCAN mcp2515 - rx buffer overflow Gianluca
2012-03-08 14:11 ` Marc Kleine-Budde
2012-03-08 14:35 ` Gianluca [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=loom.20120308T152308-549@post.gmane.org \
--to=gmattiroli@midsx.ch \
--cc=linux-can@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.