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From:   Guo Ren <guoren@kernel.org>
Date:   Mon, 7 Jun 2021 15:45:58 +0800
Message-ID: <CAJF2gTQxVHYS8m4pWekttRCSbE8O6g7ySDs5YJ=-BtqXZwvYBQ@mail.gmail.com>
Subject: Re: [RFC PATCH v2 10/11] riscv: soc: Add Allwinner SoC kconfig option
To:     Arnd Bergmann <arnd@arndb.de>
Cc:     Maxime Ripard <maxime@cerno.tech>, Anup Patel <anup.patel@wdc.com>,
        Palmer Dabbelt <palmerdabbelt@google.com>,
        Chen-Yu Tsai <wens@csie.org>,
        Drew Fustini <drew@beagleboard.org>, liush@allwinnertech.com,
        =?UTF-8?B?V2VpIFd1ICjlkLTkvJ8p?= <lazyparser@gmail.com>,
        wefu@redhat.com, linux-riscv <linux-riscv@lists.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        linux-arch <linux-arch@vger.kernel.org>,
        linux-sunxi@lists.linux.dev, Guo Ren <guoren@linux.alibaba.com>,
        Atish Patra <atish.patra@wdc.com>,
        Christoph Hellwig <hch@lst.de>
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On Mon, Jun 7, 2021 at 3:29 PM Arnd Bergmann <arnd@arndb.de> wrote:
>
> On Mon, Jun 7, 2021 at 9:20 AM Maxime Ripard <maxime@cerno.tech> wrote:
> > On Sun, Jun 06, 2021 at 09:04:08AM +0000, guoren@kernel.org wrote:
>
> > > diff --git a/arch/riscv/Kconfig.socs b/arch/riscv/Kconfig.socs
> > > index ed96376..055fb3e 100644
> > > --- a/arch/riscv/Kconfig.socs
> > > +++ b/arch/riscv/Kconfig.socs
> > > @@ -69,4 +69,16 @@ config SOC_CANAAN_K210_DTB_SOURCE
> > >
> > >  endif
> > >
> > > +config SOC_SUNXI
> > > +     bool "Allwinner SoCs"
> > > +     depends on MMU
> > > +     select DWMAC_GENERIC
> > > +     select SERIAL_8250
> > > +     select SERIAL_8250_CONSOLE
> > > +     select SERIAL_8250_DW
> > > +     select SIFIVE_PLIC
> > > +     select STMMAC_ETH
> > > +     help
> > > +       This enables support for Allwinner SoC platforms like the D1.
> > > +
> >
> > We probably don't want to select DWMAC, STMMAC_ETH and the 8250 options,
> > looks good otherwise.
>
> Correct: those subsystems may be completely disabled, which would lead to a
> build failure, and a platform should not force-enable drivers or
> subsystems unless
> those are build time dependencies.
>
>        Arnd

I see, thx. how about just leave. I think the user would make mistakes
and waste time here.
select SERIAL_8250_DW if SERIAL_8250

-- 
Best Regards
 Guo Ren

ML: https://lore.kernel.org/linux-csky/