[PATCH v5 2/7] dt-bindings: serial: sh-sci: don't required "power-domain"

[Geert Uytterhoeven]

Hi Morimoto-san,

On Thu, 18 Sept 2025 at 08:26, Kuninori Morimoto
<kuninori.morimoto.gx at renesas.com> wrote:
> {H}SCIF is in the always-on power area. "power-domain" property is not
> mandatory. Remove it.
>
> Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>

Thanks for your patch!

> I'm not sure this is acceptable patch. This is optional patch.

(H)SCIF is indeed part of the always-on power area.  However, like
for many other modules, its power management is handled similarly
through a clock/module controller.  Hence it falls under the PM Domain
abstraction, and the power-domains property is justified.

What this power-domains property will point to on R-ar X5H is a
different question, as there are no DT bindings and no driver for the
clock/module controller yet...

> --- a/Documentation/devicetree/bindings/serial/renesas,hscif.yaml
> +++ b/Documentation/devicetree/bindings/serial/renesas,hscif.yaml
> @@ -116,7 +116,6 @@ required:
>    - interrupts
>    - clocks
>    - clock-names
> -  - power-domains
>
>  if:
>    properties:

> --- a/Documentation/devicetree/bindings/serial/renesas,scif.yaml
> +++ b/Documentation/devicetree/bindings/serial/renesas,scif.yaml
> @@ -168,7 +168,6 @@ required:
>    - interrupts
>    - clocks
>    - clock-names
> -  - power-domains
>
>  allOf:
>    - $ref: serial.yaml#

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at linux-m68k.org

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