linux-kernel - Re: [PATCH 08/36] ARM: exynos: stop selecting PLAT

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Date:   Wed, 23 Oct 2019 14:43:36 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Krzysztof Kozlowski <krzk@...nel.org>
Cc:     Kukjin Kim <kgene@...nel.org>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        "moderated list:ARM/SAMSUNG EXYNOS ARM ARCHITECTURES" 
        <linux-samsung-soc@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Olof Johansson <olof@...om.net>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        "Enrico Weigelt, metux IT consult" <info@...ux.net>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        linux-mmc <linux-mmc@...r.kernel.org>
Subject: Re: [PATCH 08/36] ARM: exynos: stop selecting PLAT_SAMSUNG

On Wed, Oct 23, 2019 at 12:57 PM Krzysztof Kozlowski <krzk@...nel.org> wrote:
> On Thu, Oct 10, 2019 at 10:29:52PM +0200, Arnd Bergmann wrote:
> > @@ -1022,7 +1022,7 @@ choice
> >                 by the boot-loader before use.
> >
> >       config DEBUG_S3C_UART2
> > -             depends on PLAT_SAMSUNG
> > +             depends on PLAT_SAMSUNG || ARCH_EXYNOS
> >               select DEBUG_EXYNOS_UART if ARCH_EXYNOS
> >               select DEBUG_S3C24XX_UART if ARCH_S3C24XX
> >               select DEBUG_S3C64XX_UART if ARCH_S3C64XX
> > @@ -1034,7 +1034,7 @@ choice
> >                 by the boot-loader before use.
> >
> >       config DEBUG_S3C_UART3
> > -             depends on PLAT_SAMSUNG && (ARCH_EXYNOS || ARCH_S5PV210)
> > +             depends on ARCH_EXYNOS || ARCH_S5PV210
>
> You need to keep PLAT_SAMSUNG because of additional architectures, so
> follow pattern from DEBUG_S3C_UART2.

Are you sure? I think my version is correct: for UART2, the
"PLAT_SAMSUNG || ARCH_EXYNOS" is equivalent to "s3c24xx || s3c64xx ||
s5pv210 || exynos", which keeps the existing behavior unchanged.

For UART3, the "PLAT_SAMSUNG && ..." is redundant, this is already
limited to "s5pv210 || exynos", which my patch keeps. Changing it to
"PLAT_SAMSUNG || ..." would allow selecting the symbol on s3c24xx
and s3c64xx, which presumably is not valid.

      Arnd