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References: <20211227164317.4146918-1-schnelle@linux.ibm.com> <20211227164317.4146918-13-schnelle@linux.ibm.com>
In-Reply-To: <20211227164317.4146918-13-schnelle@linux.ibm.com>
From:   Geert Uytterhoeven <geert@linux-m68k.org>
Date:   Tue, 28 Dec 2021 11:32:42 +0100
Message-ID: <CAMuHMdXDL6XXfohzJFTTV6tR=gg=bcCQq935eKUbNaNLHp9xiw@mail.gmail.com>
Subject: Re: [RFC 12/32] iio: adc: Kconfig: add HAS_IOPORT dependencies
To:     Niklas Schnelle <schnelle@linux.ibm.com>
Cc:     Arnd Bergmann <arnd@kernel.org>,
        Bjorn Helgaas <bhelgaas@google.com>,
        John Garry <john.garry@huawei.com>,
        Nick Hu <nickhu@andestech.com>,
        Greentime Hu <green.hu@gmail.com>,
        Vincent Chen <deanbo422@gmail.com>,
        Paul Walmsley <paul.walmsley@sifive.com>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Albert Ou <aou@eecs.berkeley.edu>, Guo Ren <guoren@kernel.org>,
        Jonathan Cameron <jic23@kernel.org>,
        Lars-Peter Clausen <lars@metafoo.de>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Linux-Arch <linux-arch@vger.kernel.org>,
        linux-pci <linux-pci@vger.kernel.org>,
        linux-riscv <linux-riscv@lists.infradead.org>,
        linux-csky@vger.kernel.org, linux-iio@vger.kernel.org
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Hi Niklas,

On Mon, Dec 27, 2021 at 5:53 PM Niklas Schnelle <schnelle@linux.ibm.com> wrote:
> In a future patch HAS_IOPORT=n will result in inb()/outb() and friends
> not being declared. We thus need to add HAS_IOPORT as dependency for
> those drivers using them.
>
> Co-developed-by: Arnd Bergmann <arnd@kernel.org>
> Signed-off-by: Arnd Bergmann <arnd@kernel.org>
> Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>

Thanks for your patch!

> --- a/drivers/iio/adc/Kconfig
> +++ b/drivers/iio/adc/Kconfig
> @@ -119,7 +119,7 @@ config AD7606
>
>  config AD7606_IFACE_PARALLEL
>         tristate "Analog Devices AD7606 ADC driver with parallel interface support"
> -       depends on HAS_IOMEM
> +       depends on HAS_IOPORT

While this driver uses ins[bw](), this seems unrelated to legacy
I/O space, as the driver maps a MMIO region.  Probably different
accessors should be used instead.

Note that this driver has no in-tree users. Same for the SPI variant,
but at least that one has modern json-schema DT bindings ;-)

>         select AD7606
>         help
>           Say yes here to build parallel interface support for Analog Devices:

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