| From: |
| "Theo de Raadt" <deraadt-AT-openbsd.org> |
| To: |
| Mark Kettenis <mark.kettenis-AT-xs4all.nl> |
| Subject: |
| Re: gpio(4) support for APU2 |
| Date: |
| Mon, 10 Feb 2020 10:31:08 -0700 |
| Message-ID: |
| <24639.1581355868@cvs.openbsd.org> |
| Cc: |
| Nathanael Rensen <nathanael-AT-list.polymorpheus.com>, tech-AT-openbsd.org, owner-tech-AT-openbsd.org |
| Archive-link: |
| Article |
Mark Kettenis <mark.kettenis@xs4all.nl> wrote:
> Nathanael Rensen schreef op 2020-01-29 15:47:
> > The diff below adds gpio(4) support to wbsio(4) for Nuvoton NCT5104D
> > (pcengines APU2). It is based on Matt Dainty's diff posted to this list
> > in November 2018:
> >
> > https://marc.info/?l=openbsd-tech&m=154134941027009&...
> >
> > A key difference from Matt Dainty's original diff is the use of
> > config_search() rather than config_found() to avoid problems with
> > the lm78 driver mentioned in his post.
>
> But as before this diff does nothing to make sure it is actually
> safe to touch these gpio pins. Other machines might have the same
> chip but use the pins internally to switch power to on-board
> components.
gpio devices, sigh.
It's like wrapping a scarf around your head and crawling under a porch or deck.
You never know what surprises you'll put your hands onto.
spiders and pet poo, maybe some broken glass...
