diff --git a/drivers/tty/serdev/Kconfig b/drivers/tty/serdev/Kconfig
index cdc6b820cf93bc27273bf1480b4e821d4fa7bcee..1dbc8352e02724fb1aa27b46c42e4803053a5f95 100644
--- a/drivers/tty/serdev/Kconfig
+++ b/drivers/tty/serdev/Kconfig
@@ -6,11 +6,19 @@ menuconfig SERIAL_DEV_BUS
 	help
 	  Core support for devices connected via a serial port.
 
+	  Note that you typically also want to enable TTY port controller support.
+
 if SERIAL_DEV_BUS
 
 config SERIAL_DEV_CTRL_TTYPORT
 	bool "Serial device TTY port controller"
+	help
+	  Say Y here if you want to use the Serial device bus with common TTY
+	  drivers (e.g. serial drivers).
+
+	  If unsure, say Y.
 	depends on TTY
 	depends on SERIAL_DEV_BUS != m
+	default y
 
 endif