[PATCH v3 4/6] pmdomain: renesas: Add R-Car X5H MDLC driver

[Philipp Zabel]

On Mi, 2026-08-05 at 17:20 +0200, Geert Uytterhoeven wrote:
> Add a minimal Module Controller driver for the R-Car X5H (R8A78000) SoC.
> For now this just supports the always-on power domains, and dummy module
> clocks and resets for the serial console (which is enabled by the boot
> loader).
> 
> Signed-off-by: Geert Uytterhoeven <geert+renesas at glider.be>
> ---
> v3:
>   - 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,
> 
> v2:
>   - Spin off from "pmdomain: renesas: Add R-Car X5H MDLC SCMI remapping
>     driver",
>   - Add default support not using SCMI,
>   - Drop all SCMI remapping support,
>   - Document use of -1 as a sentinel,
>   - Rename struct r8a78000_mdlc_info to mdlc_info,
>   - Print HW IDs in hexadecimal,
>   - Reduce log level for unsupported MDLC instances from warn to dbg,
> ---
>  drivers/pmdomain/renesas/Kconfig         |   4 +
>  drivers/pmdomain/renesas/Makefile        |   1 +
>  drivers/pmdomain/renesas/r8a78000-mdlc.c | 330 +++++++++++++++++++++++
>  drivers/soc/renesas/Kconfig              |   1 +
>  4 files changed, 336 insertions(+)
>  create mode 100644 drivers/pmdomain/renesas/r8a78000-mdlc.c
> 
> diff --git a/drivers/pmdomain/renesas/r8a78000-mdlc.c b/drivers/pmdomain/renesas/r8a78000-mdlc.c
> new file mode 100644
> index 0000000000000000..5c8acead7cff9bdd
> --- /dev/null
> +++ b/drivers/pmdomain/renesas/r8a78000-mdlc.c
> @@ -0,0 +1,330 @@
[...]
> +#define DEFINE_MDLC_RESET_WRAPPER(op)					    \
> +	static int r8a78000_mdlc_ ## op(struct reset_controller_dev *rcdev, \
> +					unsigned long id)		    \
> +	{								    \
> +		struct r8a78000_mdlc_priv *priv = rcdev_to_priv(rcdev);	    \
> +									    \
> +		dev_dbg(priv->dev, "%s: Ignoring\n", __func__);		    \
> +		return 0;						    \
> +	}
> +
> +DEFINE_MDLC_RESET_WRAPPER(reset)
> +DEFINE_MDLC_RESET_WRAPPER(assert)
> +DEFINE_MDLC_RESET_WRAPPER(deassert)
> +DEFINE_MDLC_RESET_WRAPPER(status)
> +
> +static const struct reset_control_ops r8a78000_mdlc_reset_ops = {
> +	.reset = r8a78000_mdlc_reset,
> +	.assert = r8a78000_mdlc_assert,
> +	.deassert = r8a78000_mdlc_deassert,
> +	.status = r8a78000_mdlc_status,

Are .reset and .status needed by any consumers?
I'd leave them -ENOTSUPP otherwise.

regards
Philipp