Re: [PATCH v3 0/6] R-Car X5H CPG/MDLC support

[Geert Uytterhoeven]

Hi Ulf,

On Mon, 10 Aug 2026 at 16:18, Ulf Hansson <ulf.hansson@xxxxxxxxxxxxxxxx> wrote:
> On Wed, Aug 5, 2026 at 5:21 PM Geert Uytterhoeven
> <geert+renesas@xxxxxxxxx> wrote:
> > This patch series adds minimal support for the Renesas R-Car X5H Clock
> > Pulse Generator (CPG) and Module Controller (MDLC), to aim for replacing
> > the dummy clocks in r8a78000.dtsi with proper hardware description.
> > These two components are closely related, in the sense that they are
> > both supposed to be accessed through the ARM System Control and
> > Management Interface (SCMI) on the Ironhide development board.
> >
> > This series consists of three parts:
> >   1. Patches 1-2 add DT bindings and DT binding definitions,
> >   2. Patches 3-4 add minimal CPG and MDLC drivers,
> >   3. Patches 5-6 update the DTS.
> > Note that this series depends on v7.2-rc2, due to the use of
> > <linux/device-id/of.h>.
> >
> > Changes compared to v2[1]:
> >   - Add Acked-by, Reviewed-by,
> >   - Add fixed-rate clocks to kerneldoc of r8a78000_cpg_priv.map,
> >   - Use devm_clk_hw_register_fixed_rate(), drop unregister_fixed_clks(),
> >   - Drop fill_clk_map(), as it is not really needed until SCMI remapping
> >     support is added later,
> >   - Replace <linux/mod_devicetable.h> by more specific
> >     <linux/device-id/of.h> in v7.2-rc2,
> >   - Add a comment to document only always-on domains are supported,
> >   - Consistently use /* sentinel */ for zero sentinels,
> >   - Drop trailing commas from sentinels,
> >   - Sort MDLC nodes (alphabetically, by label).
> >
> > Major changes compared to v1[2] (more detail in the individual patches):
> >   - Add default support not using SCMI,
> >   - Drop everything related to SCMI.
> >
> > Note that this series does not use or rely on SCMI in any way.
> > SCMI remapping support will be added in a subsequent series (old version
> > at [3]).
> > Full hardware support without using SCMI could be added, too, if anyone
> > would care about that use case.
> >
> > For testing, I have pushed this series plus additional work (including
> > a rebased and updated version of [3]) to [4].
> >
> > While I know it is getting late in the cycle, this work (especially the
> > DT bindings) are a dependency for about any R-Car X5H progress, so it
> > would be good to have it included in v7.3.
> > Hence I plan to queue the clock patches (1, 3) in renesas-clk for v7.3
> > (Stephen still hasn't merged my earlier PR for v7.3 anyway).
> > Ulf: It would be great if you could take the pmdomain patches (2, 4).
>
> Patch 2 applied for next, but I left patch4 for now as it didn't apply

Thank you!

> cleanly (drivers/soc/renesas/Kconfig had a conflict), thanks!

I guess your tree still has the duplicate "default ARCH_RENESAS"?
Patch 4 just adds a single line there, and the conflict should be easy
to fix.

If you want to send me a new patch, please let me know.

Thanks again!

Gr{oetje,eeting}s,

                        Geert

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

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