Re: [PATCH V2 1/6] dt-bindings: pinctrl: support specifying pins, groups & functions

[Linus Walleij <linus.walleij@xxxxxxxxxx>]

On Thu, Nov 25, 2021 at 1:28 PM Rafał Miłecki <zajec5@xxxxxxxxx> wrote:

> This is a new bit to me and the reason why I got this binding that way.
>
> I had no idea pin numbering is system specific thing. I always thought
> pin numbers are present in every chip datasheets and that is just a part
> of hardware.

It's this way because some chips do not even have numbers on the
pins, just names, like "UARTTX" or so.

The numbering is often not numeral, more like a chessboard
at least for BGAs. So "C14" is a typical pin number.

If the datasheet had numbers we just include it in the string naming
that pin like "UARTTX_C14" or so.

Yours,
Linus Walleij