Re: [PATCH v8 01/11] dt-bindings: soc: renesas: Add various SolidRun RZ/G2 based boards

[Geert Uytterhoeven <geert@linux-m68k.org>]

Hi Josua,

On Fri, 25 Sept 2026 at 10:29, Josua Mayer <josua@solid-run.com> wrote:
> On 9/23/2026 3:42 PM, Geert Uytterhoeven wrote:
> > On Fri, 4 Sept 2026 at 13:56, Josua Mayer <josua@solid-run.com> wrote:
> >> Add bindings for various SolidRun boards and System on Module built
> >> around Renesas RZ/G2 family of SoCs:
> >>
> >> - RZ/G2L SoM [1]
> >> - RZ/V2L SoM [2]
> >>    (shares PCB with G2L and has very similar programming model)
> >> - RZ/G2LC SoM [3]
> >> - RZ/G2UL SoM [4]
> >>    (shares PCB with G2LC but programming model differs largely)
> >> - HummingBoard IIoT [5] (RZ/G2L, RZ/V2L, RZ/G2LC)
> >> - HummingBoard Pro [6] (RZ/G2L, RZ/V2L)
> >> - HummingBoard Base (Ripple) [7] (RZ/G2L, RZ/V2L, RZ/G2LC, RZ/G2UL)
> >>
> >> [1] https://www.solid-run.com/embedded-industrial-iot/renesas-rz-family/rz-g2l-som/
> >> [2] https://www.solid-run.com/embedded-industrial-iot/renesas-rz-family/rz-v2l-som/
> >> [3] https://www.solid-run.com/embedded-industrial-iot/renesas-rz-family/rz-g2lc-som/
> >> [4] https://www.solid-run.com/embedded-industrial-iot/renesas-rz-family/rz-g2ul-som/
> >> [5] https://www.solid-run.com/embedded-industrial-iot/renesas-rz-family/hummingboard-rz-series-sbcs/hummingboard-rz-g2l-iot-sbc/
> >> [6] https://www.solid-run.com/embedded-industrial-iot/renesas-rz-family/hummingboard-rz-series-sbcs/hummingboard-rz-g2l-sbc/
> >> [7] https://www.solid-run.com/embedded-industrial-iot/renesas-rz-family/hummingboard-rz-series-sbcs/hummingboard-rz-g2lc-base/
> >>
> >> Acked-by: Conor Dooley <conor.dooley@microchip.com>
> >> Signed-off-by: Josua Mayer <josua@solid-run.com>
> > Thanks for your patch!
> >
> >> --- a/Documentation/devicetree/bindings/soc/renesas/renesas.yaml
> >> +++ b/Documentation/devicetree/bindings/soc/renesas/renesas.yaml
> >> @@ -508,6 +508,14 @@ properties:
> >>                 - renesas,r9a07g043u12 # RZ/G2UL Type-2
> >>             - const: renesas,r9a07g043
> >>
> >> +      - description: SolidRun RZ/G2UL based boards
> >> +        items:
> >> +          - enum:
> >> +              - solidrun,rzg2ul-hummingboard-ripple # SolidRun RZ/G2UL HummingBoard Ripple
> > As RZ/G2UL is pin-compatible with RZ/G2LC,
> The SoM is, the SoC is more complex.
> SolidRun uses the G2L/G2LC package 15x15mm while G2UL is 13x13.

IC.

> You are correct to expect HB-IIoT, however due to the reduced pin count
> and feature set it is not useful and will likely never get supported by SR.

OK (same for RZ/Five ;-)

> > I guess you could have an
> > RZ/G2UL-based HummingBoard IIoT, too?
> >
> >> +          - const: solidrun,rzg2ul-sr-som
> > Is there any special meaning of the "sr" in the middle of this and all
> > other SoM compatible values?
> > If it just means "SolidRun",
>
> It does.
>
> > I think it can be dropped.
>
> The "sr" is merely to avoid name collision with other SoM vendors.

OK, for non-DT situations where there is no vendor-prefix.

> > However,
> > you already have that for various SoMs with non-Renesas SoCs.
>
> Correct.

OK, so keep it for consistency.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@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