Re: [RFC 10/32] i2c: Kconfig: add HAS_IOPORT dependencies

Geert Uytterhoeven
2021-12-28T10:22:14Z

Hi Niklas,

On Mon, Dec 27, 2021 at 5:49 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/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