Re: [PATCH/RFC 05/14] firmware: arm_scmi: Add scmi_get_base_info()

Geert Uytterhoeven
2026-04-22T06:58:47Z

On Tue, 21 Apr 2026 at 20:12, Geert Uytterhoeven
<geert+renesas@glider.be> wrote:
> Currently non-SCMI drivers cannot find out what the specific versions of
> each SCMI provider implementation on the running system are.
>
> However, different versions may use different ABIs (e.g. different clock
> IDs), or behave different, requiring remapping or workarounds in other
> drivers.
>
> Add a public function to obtain base protocol information for the
> selected SCMI provider. This will be used by the R-Car X5H Clock Pulse
> Generator and Module Controller drivers.
>
> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

> --- a/drivers/firmware/arm_scmi/driver.c
> +++ b/drivers/firmware/arm_scmi/driver.c
> @@ -3504,6 +3504,37 @@ int scmi_inflight_count(const struct scmi_handle *handle)
> }
> }
>
> +/**
> + * scmi_get_base_info() - Get SCMI base protocol information
> + *
> + * @of_node: pointer to a device node for an SCMI provider
> + * @version: pointer to write base protocol information
> + *
> + * Check if an SCMI device has been instantiated for the passed device node
> + * pointer, and, if found, return its base info.
> +

Missing asterisk, reported by the kernel test robot.

> + * Return: 0 on Success or -ENOENT.
> + */

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