Hi--

On 6/4/20 3:14 AM, Mateusz Holenko wrote:

+config SERIAL_LITEUART
+	tristate "LiteUART serial port support"
+	depends on HAS_IOMEM
+	depends on OF || COMPILE_TEST
+	depends on LITEX_SOC_CONTROLLER
+	select SERIAL_CORE
+	help
+	  This driver is for the FPGA-based LiteUART serial controller from LiteX
+	  SoC builder.
+
+	  Say 'Y' here if you wish to use the LiteUART serial controller.
+	  Otherwise, say 'N'.

That last paragraph seems to say that Y and N are the only choices here.
It can also be set to M ...

-- 
~Randy