[PATCH v7 4/5] tty: serial: handle HAS_IOPORT dependencies

[Niklas Schnelle]

On Tue, 2024-10-08 at 13:32 +0200, Niklas Schnelle wrote:
> In a future patch HAS_IOPORT=n will disable inb()/outb() and friends at
> compile time. We thus need to add HAS_IOPORT as dependency for those
> drivers using them unconditionally. Some 8250 serial drivers support
> MMIO only use, so fence only the parts requiring I/O ports and print an
> error message if a device can't be supported with the current
> configuration.
> 
> Co-developed-by: Arnd Bergmann <arnd at kernel.org>
> Signed-off-by: Arnd Bergmann <arnd at kernel.org>
> Signed-off-by: Niklas Schnelle <schnelle at linux.ibm.com>
> ---
> 
---8<---
> diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig
> index 47ff50763c048c89b19b7c9f13f462bc5368ab43..afa75020d132de2210545fbe54e0d03df4b72a41 100644
> --- a/drivers/tty/serial/8250/Kconfig
> +++ b/drivers/tty/serial/8250/Kconfig
> @@ -6,7 +6,6 @@
>  
>  config SERIAL_8250
>  	tristate "8250/16550 and compatible serial support"
> -	depends on !S390
>  	select SERIAL_CORE
>  	select SERIAL_MCTRL_GPIO if GPIOLIB
>  	help

Sorry ;-( I didn't mean to commit the above hunk. I always need to
change this for my test compiles and it slipped in. With this series it
all builds but we previously decided we don't want this as part of this
patch. I'll send a v8.