Commit 1b997aef authored May 21, 2023 by James Hilliard Committed by Greg Kroah-Hartman May 30, 2023

serial: Indicate fintek option may also be required for RS232 support



The current config comment for SERIAL_8250_FINTEK implies that this
option is only needed when one wants to support RS485. As it turns
out we also need to enable this option for RS232 support to function
correctly on some variants.

For example for variants such as the F71869AD attempting to use
multiple RS232 ports simultaneously without this option enabled can
result in data corruption.

Signed-off-by: James Hilliard <james.hilliard1@gmail.com>
Link: https://lore.kernel.org/r/20230521075046.3539376-1-james.hilliard1@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 20ec397d

drivers/tty/serial/8250/Kconfig

+6 −4

Original line number	Diff line number	Diff line
		@@ -71,14 +71,16 @@ config SERIAL_8250_16550A_VARIANTS
		console, you can say N here.

		config SERIAL_8250_FINTEK
		bool "Support for Fintek F81216A LPC to 4 UART RS485 API"
		bool "Support for Fintek variants"
		depends on SERIAL_8250
		help
		Selecting this option will add support for the RS485 capabilities
		of the Fintek F81216A LPC to 4 UART.
		Selecting this option will add support for the RS232 and RS485
		capabilities of the Fintek F81216A LPC to 4 UART as well similar
		variants.

		If this option is not selected the device will be configured as a
		standard 16550A serial port.
		standard 16550A serial port, however the device may not function
		correctly without this option enabled.

		If unsure, say N.