Any sync-serial driver users (ce/cp/ctau/cx)?

[Ed Maste]

On Sat, 29 Feb 2020 at 15:57, Warner Losh <imp at bsdimp.com> wrote:
>
> Given the ~15 years of nothing but API changes to these cards, and the lack of testing of those changes, and the large technology transitions in net and tty layers of the system, I'd honestly be surprised if these drivers still work.

Deprecation notices in review D23928 https://reviews.freebsd.org/D23928.

As rgrimes points out cx(4) is for an ISA card (Cronyx Sigma family),
and I assume there's no conflict over removing it. Likewise with ctau,
which is also ISA, discontinued by the manufacturer and not supported
in FreeBSD 7+ by them.