# Re: \[RFC 10/32\] i2c: Kconfig: add HAS\_IOPORT dependencies

- From: Geert Uytterhoeven \<geert@linux-m68k.org\>
- Date: 2021-12-28 10:22:14 
- List: linux-arch
- Page: https://ratatoskr.run/linux-arch/2021/12/1619831
- Thread: https://ratatoskr.run/linux-arch/2021/12/1619460/t.md

```text
Hi Niklas,

On Mon, Dec 27, 2021 at 5:49 PM Niklas Schnelle [ref] 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/i2c/busses/Kconfig
> +++ b/drivers/i2c/busses/Kconfig
> @@ -828,6 +828,7 @@ config I2C_NPCM7XX
>
>  config I2C_OCORES
>         tristate "OpenCores I2C Controller"
> +       depends on HAS_IOPORT

While drivers/i2c/busses/i2c-ocores.c does use {in,out}(), I doubt this
is used to access legacy I/O space.

>         help
>           If you say yes to this option, support will be included for the
>           OpenCores I2C controller. For details see
> @@ -1227,6 +1228,7 @@ config I2C_CP2615
>  config I2C_PARPORT
>         tristate "Parallel port adapter"
>         depends on PARPORT
> +       depends on HAS_IOPORT

Same as PRINTER: shouldn't this work with all parport drivers?

>         select I2C_ALGOBIT
>         select I2C_SMBUS
>         help

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
```