[PATCH 2/2] serial: 8250: fix building Ingenic with SERIAL_8250=m

Paul Gortmaker
2016-02-08T16:45:44Z

[[PATCH 2/2] serial: 8250: fix building Ingenic with SERIAL_8250=m] On 08/02/2016 (Mon 13:51) Arnd Bergmann wrote:

> The Ingenic 8250 driver has a 'bool' Kconfig symbol, but that
> breaks when SERIAL_8250 is a loadable module:
>
> drivers/tty/built-in.o: In function `ingenic_uart_probe':
> 8250_ingenic.c:(.text+0x1c1a0): undefined reference to `serial8250_register_8250_port'
>
> This changes the symbol to a 'tristate', plus a dependency on

Note that Greg just queued a patch yesterday (but sent in 2015) that
removed what was the dead modular code.

It could also depend on SERIAL_8250=y to resolve the build issue you
found, if nobody cares about having modular SOC console UART drivers.

Either way, I don't have issue with it being tristate vs bool, but if
you do go with tristate, then my patch will have to be dropped/reverted.

Paul.
--

> SERIAL_8250, which makes it work again. Unlike the other
> soc-specific backends, this one has no dependency on an
> architecture or a platform. I'm adding a dependency on
> MIPS || COMPILE_TEST as well here, to avoid showing the driver
> on architectures that are not interested in it.
>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---
> drivers/tty/serial/8250/Kconfig | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig
> index 6ae0fae4f796..13c63b14179f 100644
> --- a/drivers/tty/serial/8250/Kconfig
> +++ b/drivers/tty/serial/8250/Kconfig
> @@ -384,8 +384,8 @@ config SERIAL_8250_UNIPHIER
> serial ports, say Y to this option. If unsure, say N.
>
> config SERIAL_8250_INGENIC
> - bool "Support for Ingenic SoC serial ports"
> - depends on OF_FLATTREE
> + tristate "Support for Ingenic SoC serial ports"
> + depends on SERIAL_8250 && OF_FLATTREE && (MIPS || COMPILE_TEST)
> select LIBFDT
> help
> If you have a system using an Ingenic SoC and wish to make use of
> --
> 2.7.0
>