linux-kernel - Re: [RFC v2 10/39] gpio: add HAS

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Date:   Fri, 29 Apr 2022 10:32:46 -0400
From:   William Breathitt Gray <william.gray@...aro.org>
To:     Niklas Schnelle <schnelle@...ux.ibm.com>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
        linux-pci@...r.kernel.org, Arnd Bergmann <arnd@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>
Subject: Re: [RFC v2 10/39] gpio: add HAS_IOPORT dependencies

On Fri, Apr 29, 2022 at 03:50:16PM +0200, Niklas Schnelle 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@...nel.org>
> Signed-off-by: Niklas Schnelle <schnelle@...ux.ibm.com>
> ---
>  drivers/gpio/Kconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
> index 45764ec3b2eb..14e5998ee95c 100644
> --- a/drivers/gpio/Kconfig
> +++ b/drivers/gpio/Kconfig
> @@ -697,7 +697,7 @@ config GPIO_VR41XX
>  
>  config GPIO_VX855
>  	tristate "VIA VX855/VX875 GPIO"
> -	depends on (X86 || COMPILE_TEST) && PCI
> +	depends on (X86 || COMPILE_TEST) && PCI && HAS_IOPORT
>  	select MFD_CORE
>  	select MFD_VX855
>  	help
> -- 
> 2.32.0

I noticed a number of other GPIO drivers make use of inb()/outb() -- for
example the PC104 drivers -- should the respective Kconfigs for those
drivers also be adjusted here?

William Breathitt Gray

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