[U-Boot] CAN framework in U-Boot

[Bhupesh SHARMA]

Hi Wolfgang,

Thanks for your timely inputs.

On Thu, May 2, 2013 at 12:31 PM, Wolfgang Grandegger <wg at grandegger.com>wrote:

> Hi Bhupesh,
>
> On 05/01/2013 06:17 AM, Bhupesh SHARMA wrote:
> > Hi Wolfgang G. and list,
> >
> > I was looking to do some basic tests on a C_CAN module inside our SOC at
> > u-boot
> > level, till the Linux OS is up and working to test basic CAN features.
> >
> > I couldn't figure out if CAN framework is supported in u-boot and would
> > really appreciate if
> > someone can help me out regarding the same.
> >
> > I could see the sja1000 header present inside 'include/sja1000.h', and
> some
> > old patches
> > from Wolfgang G. (see [1]), but couldn't figure out if these patches were
> > accepted into u-boot.
> >
> > Any help will be much appreaciated.
> >
> > [1]. http://article.gmane.org/gmane.comp.boot-loaders.u-boot/70864
>
> There is no generic CAN interface in U-Boot yet. The "sja1000.h" header
> file is used for some basic CAN loopback test commands and there are
> others, e.g. for the MSCAN. I have hacked something recently for Flexcan:
>
> +U_BOOT_CMD(
> +       can_test,       CONFIG_SYS_MAXARGS,     1,      do_can_test,
> +       "transfer and check messages between two CAN controllers",
> +       "[kb-per-sec] [repeat-count]"
> +);
>
> Unfortunately, those commands are all board specific. A more generic
> approach is appreciated, of course.
>
Yes. I would like to explore the possibility of adding some generic CAN
framework to u-boot.
Do you think your last patches, will be a good starting point?

I can try to test the same on flexcan as well.

Regards,
Bhupesh