Re: [PATCH v9] can, tty: can327 CAN/ldisc driver for ELM327 based OBD-II adapters

[Max Staudt]

On Tue, 5 Jul 2022 11:49:27 +0200
Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx> wrote:

> On 05.07.2022 11:43:52, Geert Uytterhoeven wrote:
> > So development started before commit cd6484e1830be260 ("serdev:
> > Introduce new bus for serial attached devices").  I guess that is
> > the reason why this driver uses a line discipline, instead of the
> > serial bus?
> > 
> > I had a quick glance through the various revisions posted, and it
> > doesn't seem like anyone mentioned the serial bus.  Would there be
> > any advantage in migrating to the serial bus?  
> 
> Does serial bus work with hot plug devices like USB Serial Adapters
> and/or devices that are not described in the device tree?

This is indeed the reason. The device cannot be autodetected, as the
UART has no identifying information (USB VID/PID or the like, and don't
forget the BT variants) attached to it, hence the manual attachment.


Max