[RFC PATCH 1/3] ARM: Introduce ARM_SINGLE_ARMV7R for ARMv7-R platforms

[Arnd Bergmann]

On Thu, Jun 30, 2022 at 10:36 AM Vladimir Murzin
<vladimir.murzin at arm.com> wrote:
>  config ARM_SINGLE_ARMV7M
> -       def_bool !MMU
> +       bool "ARM Cortex-M based platforms"
>         select ARM_NVIC
>         select AUTO_ZRELADDR
>         select TIMER_OF
> @@ -315,6 +320,18 @@ config ARM_SINGLE_ARMV7M
>         select SPARSE_IRQ
>         select USE_OF
>
> +config ARM_SINGLE_ARMV7R
> +       bool "ARM Cortex-R based platforms"
> +       select AUTO_ZRELADDR
> +       select TIMER_OF
> +       select COMMON_CLK
> +       select CPU_V7
> +       select NO_IOPORT_MAP
> +       select SPARSE_IRQ
> +       select USE_OF
> +

I was actually hoping to eventually kill off the
ARM_SINGLE_ARMV7M and ARCH_MULTIPLATFORM symbols
and just select the other symbols from CONFIG_ARM directly, like

        select SPARSE_IRQ if !ARCH_RPC
        select TIMER_OF if OF
        select USE_OF if !(CPU_SA110 || CPU_SA1100)
        select COMMON_CLK if !(ARCH_FOOTBRIDGE || ARCH_RPC)
        ...

That can of course be done independently from your series, but
it looks like ARM_SINGLE_ARMV7M and ARM_SINGLE_ARMV7R
are mostly the same here, except for the ARM_NVIC selects that
could be done by the platforms, and the CPU_V7/CPU_V7M
difference that could be folded into the CPU selection menu.

       Arnd