Re: [PATCH 4/4] can: bxcan: add support for single peripheral configuration

Dario Binacchi
2023-04-25T20:10:28Z

Hi Marc,

On Mon, Apr 24, 2023 at 12:06 PM Marc Kleine-Budde <mkl@pengutronix.de> wrote:
>
> On 24.04.2023 08:56:03, Dario Binacchi wrote:
> > > This probably works. Can we do better, i.e. without this additional code?
> > >
> > > If you add a syscon node for the single instance CAN, too, you don't
> > > need a code change here, right?
> >
> > I think so.
> >
> > I have only one doubt about it. This implementation allows,
> > implicitly, to distinguish if the peripheral is in single
> > configuration (without handle to the gcan node) or in double
> > configuration (with handle to the gcan node). For example, in single
> > configuration the peripheral has 14 filter banks, while in double
> > configuration there are 26 shared banks. Without code changes, this
> > kind of information is lost. Is it better then, for future
> > developments, to add a new boolean property to the can node of the dts
> > (e.g. single-conf)?
>
> The DT ist not yet mainline, so we can still change it. Another option
> is to have "st,can-primary" and "st,can-secondary" for the shared
> peripherals and nothing for the single instance.

I did some tests following your suggestion. It is however necessary to
make some small changes to the driver.
I will send v2 as soon as possible.

Thanks and regards,
Dario

>
> regards,
> Marc
>
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--

Dario Binacchi

Senior Embedded Linux Developer

dario.binacchi@amarulasolutions.com

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