linux-kernel - Re: [PATCH] ARM: make ARCH_S3C24XX select USE

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Message-ID: <CAJKOXPf0kWKQCf7avT4LLpkanhh-WvFoNUzdvpNDk2Q-KkymJQ@mail.gmail.com>
Date:   Fri, 22 Dec 2017 13:41:40 +0100
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc:     arm@...nel.org, Olof Johansson <olof@...om.net>,
        Arnd Bergmann <arnd@...db.de>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Russell King <linux@...linux.org.uk>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] ARM: make ARCH_S3C24XX select USE_OF and clean-up boot/dts/Makefile

On Mon, Nov 27, 2017 at 3:19 AM, Masahiro Yamada
<yamada.masahiro@...ionext.com> wrote:
> ARCH_S3C24XX is a very exceptional platform that some DT files in
> arch/arm/boot/dts/, but does not select USE_OF.

Not entirely. The platform does select USE_OF - when MACH_S3C2416_DT
is chosen. For other boards USE_OF is not necessary because they do
not use DT. Why you need to select it for entire arch?

Best regards,
Krzysztof

>
> All the other platforms with DT files correctly select USE_OF
> directly or indirectly (Most of them are either ARCH_MULTIPLATFORM
> or ARM_SINGLE_ARMV7M).
>
> With ARCH_S3C24XX fixed, "ifeq ($(CONFIG_OF),y)" in DT Makefile
> can be deleted.
>
> Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
> ---
>
>  arch/arm/Kconfig           | 1 +
>  arch/arm/boot/dts/Makefile | 3 ---
>  2 files changed, 1 insertion(+), 3 deletions(-)
>
> diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
> index 51c8df5..5604497 100644
> --- a/arch/arm/Kconfig
> +++ b/arch/arm/Kconfig
> @@ -595,6 +595,7 @@ config ARCH_S3C24XX
>         select MULTI_IRQ_HANDLER
>         select NEED_MACH_IO_H
>         select SAMSUNG_ATAGS
> +       select USE_OF
>         help
>           Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
>           and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
> diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
> index d0381e9..6f7f25d 100644
> --- a/arch/arm/boot/dts/Makefile
> +++ b/arch/arm/boot/dts/Makefile
> @@ -1,6 +1,4 @@
>  # SPDX-License-Identifier: GPL-2.0
> -ifeq ($(CONFIG_OF),y)
> -
>  dtb-$(CONFIG_ARCH_ALPINE) += \
>         alpine-db.dtb
>  dtb-$(CONFIG_MACH_ARTPEC6) += \
> @@ -1104,4 +1102,3 @@ dtb-$(CONFIG_ARCH_ZX) += zx296702-ad1.dtb
>  dtb-$(CONFIG_ARCH_ASPEED) += aspeed-bmc-opp-palmetto.dtb \
>         aspeed-bmc-opp-romulus.dtb \
>         aspeed-ast2500-evb.dtb
> -endif
> --
> 2.7.4
>
> --
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