On Mon, Feb 9, 2026 at 3:25 AM Billy Tsai [off-list ref] wrote:

To make sure I align with your expectations:
1) Would you prefer the new driver to be fully standalone (using the
   GENERIC_PIN* helpers + syscon/regmap-mmio), rather than trying to
   refactor/export helpers from pinctrl-single?

Yes. Conor improved these helpers so now it should be possible
to use these to do a very simple and slim driver for what you
want to do.

   Action item: Introduce a new pinctrl-single-bit.c driver and DT
   binding, which can also cover the existing bit-per-mux logic currently
   in pinctrl-single.c.

Sounds about right.

2) For the syscon/regmap hookup, is it acceptable to add a syscon phandle
   property in DT (e.g. "syscon = <&scu>;") for the new driver to obtain
   the regmap, or do you prefer a different binding/property name?

This works for me.

Yours,
Linus Walleij