Re: [RFC PATCH 0/6] arm64: dts: renesas: add SWDT

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

Hi Wolfram,

On Sat, 20 Sept 2025 at 08:44, Wolfram Sang
<wsa+renesas@sang-engineering.com> wrote:
> I forgot over the years why we did not enable the SWDT on R-Car Gen3+.
> The reason is that it is used by the firmware on Renesas boards.
> However, this was not documented. So, based on a previous discussion
> with Geert, here is an RFC how this documentation could look like:
>
> * add the complete node to the SoC DTSI (here only R-Car H3, M3*)
> * mark the node as "reserved" for the relevant boards
>   (firmware should have done that(tm))
>
> If this approach is acceptable, I'd handle the other SoCs, too, of
> course. Looking forward to comments! Passes dtbs_check here BTW.
>
> Wolfram Sang (6):
>   arm64: dts: renesas: r8a77951: add SWDT node
>   arm64: dts: renesas: r8a77960: add SWDT node
>   arm64: dts: renesas: r8a77961: add SWDT node
>   arm64: dts: renesas: r8a77965: add SWDT node
>   arm64: dts: renesas: salvator-common: mark SWDT as reserved
>   arm64: dts: renesas: ulcb: mark SWDT as reserved

Thanks for your series!

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>

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