Re: [PATCH v3 09/38] gpio: add HAS_IOPORT dependencies

Linus Walleij <linus.walleij@xxxxxxxxxx> · Wed, 15 Mar 2023 09:42:03 +0100

Hi Niklas,

thanks for your patch!

On Tue, Mar 14, 2023 at 1:12 PM Niklas Schnelle <schnelle@xxxxxxxxxxxxx> 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@xxxxxxxxxx>
> Signed-off-by: Niklas Schnelle <schnelle@xxxxxxxxxxxxx>
> ---
>  drivers/gpio/Kconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
> index 13be729710f2..5a874e67fc13 100644
> --- a/drivers/gpio/Kconfig
> +++ b/drivers/gpio/Kconfig
> @@ -688,7 +688,7 @@ config GPIO_VISCONTI
>
>  config GPIO_VX855
>         tristate "VIA VX855/VX875 GPIO"
> -       depends on (X86 || COMPILE_TEST) && PCI
> +       depends on (X86 || COMPILE_TEST) && PCI && HAS_IOPORT

But is this the right fix? Further down in the Kconfig we have:

menu "Port-mapped I/O GPIO drivers"
        depends on X86 # Unconditional I/O space access

config GPIO_I8255
        tristate
        select GPIO_REGMAP

(...)

Isn't the right fix to:

1) Move this Kconfig entry (VX855) down under the Port-mapped /O drivers,
   and then:

2) Make the whole submenu for port-mapped IO drivers depend on
   X86 && HAS_IOPORT

Yours,
Linus Walleij