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| author | Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com> | 2016-04-27 10:40:10 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-04-30 09:26:55 -0700 |
| commit | fa01e2ca9f531b4a5693469a196eb1574b8d7d8a (patch) | |
| tree | 3f43beffb9efaeedcc35db48c1a5a010482bdfa6 /drivers/tty/serial/8250/Kconfig | |
| parent | bd8d257fa3371a284568b8ee04c2bcf4757238ed (diff) | |
| download | talos-obmc-linux-fa01e2ca9f531b4a5693469a196eb1574b8d7d8a.tar.gz talos-obmc-linux-fa01e2ca9f531b4a5693469a196eb1574b8d7d8a.zip | |
serial: 8250: Integrate Fintek into 8250_base
The 8250_fintek driver advertises as the PNP0501 driver; however this
conflicts with the standard 16550A uart PNP0501. The conflict causes
the 8250_fintek driver to load with _every_ PNP0501, but never probe,
and causing the entire 8250 driver stack to unload if the 8250_fintek
driver is unloaded (modprobe doesn't know that 8250_pnp rather than
8250_fintek claimed the resource).
This patch merges the Fintek driver into 8250_base. On autoconfig_16550
the device is probed to verify if it is a FINTEK device or not.
This custom probing can be disabled completely via configuration. When a
Fintek device is not probed it will behave as a standard 16550A device,
with no RS485 capabilities.
Reported-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Reviewed-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/8250/Kconfig')
| -rw-r--r-- | drivers/tty/serial/8250/Kconfig | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig index 7f33d3494cea..e46761d20f7b 100644 --- a/drivers/tty/serial/8250/Kconfig +++ b/drivers/tty/serial/8250/Kconfig @@ -57,6 +57,18 @@ config SERIAL_8250_PNP This builds standard PNP serial support. You may be able to disable this feature if you only need legacy serial support. +config SERIAL_8250_FINTEK + bool "Support for Fintek F81216A LPC to 4 UART RS485 API" + depends on SERIAL_8250 + ---help--- + Selecting this option will add support for the RS485 capabilities + of the Fintek F81216A LPC to 4 UART. + + If this option is not selected the device will be configured as a + standard 16550A serial port. + + If unsure, say N. + config SERIAL_8250_CONSOLE bool "Console on 8250/16550 and compatible serial port" depends on SERIAL_8250=y @@ -358,14 +370,6 @@ config SERIAL_8250_OMAP_TTYO_FIXUP not booting kernel because the serial console remains silent in case they forgot to update the command line. -config SERIAL_8250_FINTEK - tristate "Support for Fintek F81216A LPC to 4 UART" - depends on SERIAL_8250 && PNP - help - Selecting this option will add support for the Fintek F81216A - LPC to 4 UART. This device has some RS485 functionality not available - through the PNP driver. If unsure, say N. - config SERIAL_8250_LPC18XX tristate "NXP LPC18xx/43xx serial port support" depends on SERIAL_8250 && OF && (ARCH_LPC18XX || COMPILE_TEST) |
