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

[Ulf Hansson]

On Wed, Aug 5, 2026 at 5:21 PM Geert Uytterhoeven
<geert+renesas at glider.be> wrote:
>
>         Hi all,
>
> 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
cleanly (drivers/soc/renesas/Kconfig had a conflict), thanks!

> The DTS changes (5-6) can wait for v7.4; they have a hard dependency on
> the presence of both drivers anyway.
>

[...]

Kind regards
Uffe