linux-kernel - Re: [PATCH v2 5/8] arm: bcmbca: Move BCM63138 ARCH_BCM_63XX to ARCH

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Date:   Wed, 13 Jul 2022 17:35:35 +0200
From:   Rafał Miłecki <zajec5@...il.com>
To:     William Zhang <william.zhang@...adcom.com>,
        Linux ARM List <linux-arm-kernel@...ts.infradead.org>
Cc:     Broadcom Kernel List <bcm-kernel-feedback-list@...adcom.com>,
        joel.peshkin@...adcom.com, dan.beygelman@...adcom.com,
        kursad.oney@...adcom.com, f.fainelli@...il.com,
        anand.gore@...adcom.com, Ray Jui <rjui@...adcom.com>,
        Russell King <linux@...linux.org.uk>,
        Scott Branden <sbranden@...adcom.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 5/8] arm: bcmbca: Move BCM63138 ARCH_BCM_63XX to
 ARCH_BCMBCA

On 7.07.2022 09:00, William Zhang wrote:
> Remove ARCH_BCM_63XX Kconfig for BCM63138 and merge its selections to
> ARCH_BCMBCA. Delete bcm63xx.c as it is no longer needed.
> 
> Signed-off-by: William Zhang <william.zhang@...adcom.com>
> ---
> 
> (no changes since v1)
> 
>   arch/arm/mach-bcm/Kconfig   | 26 +++++++++-----------------
>   arch/arm/mach-bcm/Makefile  |  7 +------
>   arch/arm/mach-bcm/bcm63xx.c | 17 -----------------
>   3 files changed, 10 insertions(+), 40 deletions(-)
>   delete mode 100644 arch/arm/mach-bcm/bcm63xx.c
> 
> diff --git a/arch/arm/mach-bcm/Kconfig b/arch/arm/mach-bcm/Kconfig
> index f73a056bf560..25aa4ef4db07 100644
> --- a/arch/arm/mach-bcm/Kconfig
> +++ b/arch/arm/mach-bcm/Kconfig
> @@ -182,23 +182,6 @@ config ARCH_BCM_53573
>   	  The base chip is BCM53573 and there are some packaging modifications
>   	  like BCM47189 and BCM47452.
>   
> -config ARCH_BCM_63XX
> -	bool "Broadcom BCM63xx DSL SoC"
> -	depends on ARCH_MULTI_V7
> -	select ARCH_HAS_RESET_CONTROLLER
> -	select ARM_ERRATA_754322
> -	select ARM_ERRATA_764369 if SMP
> -	select ARM_GIC
> -	select ARM_GLOBAL_TIMER
> -	select CACHE_L2X0
> -	select HAVE_ARM_ARCH_TIMER
> -	select HAVE_ARM_TWD if SMP
> -	select HAVE_ARM_SCU if SMP
> -	help
> -	  This enables support for systems based on Broadcom DSL SoCs.
> -	  It currently supports the 'BCM63XX' ARM-based family, which includes
> -	  the BCM63138 variant.

Oh, wait a second. This is actually going to totally break builds for
people because there are a lot of Kconfig-s that depend on it!

I don't believe it can't be handled this way.

You need to first introduce a replacement / parent symbol.
Then (in another release if needed) update all Kconfig-s.
Then eventually you can get rid of ARCH_BCM_63XX.