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From:   Geert Uytterhoeven <geert@linux-m68k.org>
Date:   Wed, 14 Apr 2021 20:55:21 +0200
Message-ID: <CAMuHMdUkDcdZk5YYnkMH+VD4JXFq4khR2dn8wBdSXs1GCT9UMQ@mail.gmail.com>
Subject: Re: [PATCH] i2c: I2C_HISI should depend on ARCH_HISI && ACPI
To:     Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc:     Yicong Yang <yangyicong@hisilicon.com>,
        Wei Xu <xuwei5@hisilicon.com>,
        Wolfram Sang <wsa+renesas@sang-engineering.com>,
        Dmitry Osipenko <digetx@gmail.com>,
        Linux I2C <linux-i2c@vger.kernel.org>,
        Linux ARM <linux-arm-kernel@lists.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Linuxarm <linuxarm@huawei.com>
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Hi Andy,

On Wed, Apr 14, 2021 at 8:18 PM Andy Shevchenko
<andriy.shevchenko@linux.intel.com> wrote:
> On Wed, Apr 14, 2021 at 08:06:18PM +0200, Geert Uytterhoeven wrote:
> > On Wed, Apr 14, 2021 at 11:24 AM Yicong Yang <yangyicong@hisilicon.com> wrote:
> > > On 2021/4/13 20:26, Geert Uytterhoeven wrote:
> > > > The HiSilicon Kunpeng I2C controller is only present on HiSilicon
> > > > Kunpeng SoCs, and its driver relies on ACPI to probe for its presence.
> > > > Hence add dependencies on ARCH_HISI and ACPI, to prevent asking the user
> > > > about this driver when configuring a kernel without Hisilicon platform
> > > > or ACPI firmware support.
> > >
> > > this is a public IP which doesn't specifically depend on ARCH_HISI. I'm
> > > not sure all the platform this IP on has ARCH_HISI configured. The driver
> > > will not be compiled by default config. This is not correct to have
> > > this dependence.
> >
> > Thanks for your answer!
> >
> > I guess it's still fine to add a dependency on ACPI?
>
> But why?

Please tell me how/when the driver is used when CONFIG_ACPI=n.
Thanks!

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds