Re: [PATCH 14/16] arm64: dts: axis: Add initial device tree support

["Arnd Bergmann" <arnd@arndb.de>]

On Thu, Jul 10, 2025, at 02:20, ksk4725@coasia.com wrote:
> From: sungminpark <smn1196@coasia.com>
>
> Add initial device tree support for Axis ARTPEC-8 SoC and Grizzly board.
> This SoC contains four cores of cortex-a53 CPUs and other various
> peripheral IPs.

> diff --git a/MAINTAINERS b/MAINTAINERS
> index fa1e04e87d1d..371005f3f41a 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -2320,6 +2320,20 @@ F:	drivers/crypto/axis
>  F:	drivers/mmc/host/usdhi6rol0.c
>  F:	drivers/pinctrl/pinctrl-artpec*
> 
> +ARM/ARTPEC ARM64 MACHINE SUPPORT
> +M:	Jesper Nilsson <jesper.nilsson@axis.com>
> +M:	Ravi Patel <ravi.patel@samsung.com>
> +M:	SeonGu Kang <ksk4725@coasia.com>
> +M:	SungMin Park <smn1196@coasia.com>
> +L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
> +L:	linux-samsung-soc@vger.kernel.org
> +L:	linux-arm-kernel@axis.com
> +S:	Maintained
> +F:	Documentation/devicetree/bindings/clock/axis,artpec*-clock.yaml
> +F:	arch/arm64/boot/dts/axis/
> +F:	drivers/clk/samsung/clk-artpec*.c
> +F:	include/dt-bindings/clock/axis,artpec*-clk.h

I'm trying to understand the SoC family tree here. I see that
you have an entry for ARTPEC SoCs above it, which currently
covers artpec6 (Cortex-A9, apparently not Samsung based).

Is the reason for having two entries here that artpec6/7 and
artpec8/9 are two separate SoC families, or is this just because
they are using 32-bit and 64-bit cores, respectively?

> 
> +config ARCH_ARTPEC
> +	bool "Axis Communications ARTPEC SoC Family"
> +	help
> +	   This enables support for the ARMv8 based ARTPEC SoC Family.
> +
> +config ARCH_ARTPEC8
> +	bool "Axis ARTPEC-8 SoC Platform"
> +	depends on ARCH_ARTPEC
> +	depends on ARCH_EXYNOS
> +	select ARM_GIC
> +	help
> +	  This enables support for the Axis ARTPEC-8 SoC.
> +

I would prefer to be less fine-grained here, especially as
it seems that ARTPEC9 is again quite similar to ARTPEC8, as
far as I can guess from public information.

Could you fold both entries into a single ARCH_ARTPEC?

     Arnd