Hi Alexandre,
On Sat, Mar 13, 2021 at 10:28 AM Alexandre Belloni
<alexandre.belloni@xxxxxxxxxxx> wrote:
> On 12/03/2021 14:57:54+0100, Enrico Weigelt, metux IT consult wrote:
> > On 02.03.21 06:30, Drew Fustini wrote:
> > > Add "pinmux-select" to debugfs which will activate a pin function for a
> > > given pin group:
> > >
> > > echo "<group-name function-name>" > pinmux-select
> > >
> > > The write operation pinmux_select() handles this by checking that the
> > > names map to valid selectors and then calling ops->set_mux().
> >
> > I've already been playing with similar idea, but for external muxes.
> > For example, some boards have multiple SIM slots that can be switched
> > via some gpio pin.
> >
> > Not sure whether traditional pinmux would be a good match for that.
>
> If you want to be able to use both, then I guess gpio-mux is what you
> are looking for. Obviously, it will also require support in the bus
> core. On what bus are those SIMs? (I guess the answer will be UART and
> then unfortunately UARTs are not represented as busses).
We do have support for devices connected to UARTs.
See patternProperties in Documentation/devicetree/bindings/serial/serial.yaml.
Or do you mean something different?
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
