diff --git a/target/linux/airoha/an7581/config-6.6 b/target/linux/airoha/an7581/config-6.6
index 358a953393..8074e514f8 100644
--- a/target/linux/airoha/an7581/config-6.6
+++ b/target/linux/airoha/an7581/config-6.6
@@ -517,6 +517,7 @@ CONFIG_SECURITY=y
 CONFIG_SECURITYFS=y
 # CONFIG_SECURITY_DMESG_RESTRICT is not set
 # CONFIG_SECURITY_NETWORK is not set
+CONFIG_SERIAL_8250_AIROHA=y
 CONFIG_SERIAL_8250_EXTENDED=y
 CONFIG_SERIAL_8250_FSL=y
 CONFIG_SERIAL_8250_NR_UARTS=5
diff --git a/target/linux/airoha/patches-6.6/105-uart-add-en7523-support.patch b/target/linux/airoha/patches-6.6/105-uart-add-en7523-support.patch
index 9ea355370b..39a4944daf 100644
--- a/target/linux/airoha/patches-6.6/105-uart-add-en7523-support.patch
+++ b/target/linux/airoha/patches-6.6/105-uart-add-en7523-support.patch
@@ -135,6 +135,25 @@
  	/*
  	 * LCR DLAB must be set to enable 64-byte FIFO mode. If the FCR
  	 * is written without DLAB set, this mode will be disabled.
+--- a/drivers/tty/serial/8250/Kconfig
++++ b/drivers/tty/serial/8250/Kconfig
+@@ -354,6 +354,16 @@ config SERIAL_8250_ACORN
+ 	  system, say Y to this option.  The driver can handle 1, 2, or 3 port
+ 	  cards.  If unsure, say N.
+ 
++config SERIAL_8250_AIROHA
++	tristate "Airoha UART support"
++	depends on (ARCH_AIROHA || COMPILE_TEST) && OF && SERIAL_8250
++	help
++	  Selecting this option enables an Airoha SoC specific baud rate
++	  calculation routine on an otherwise 16550 compatible UART hardware.
++
++	  If you have an Airoha based board and want to use the serial port,
++	  say Y to this option. If unsure, say N.
++
+ config SERIAL_8250_BCM2835AUX
+ 	tristate "BCM2835 auxiliar mini UART support"
+ 	depends on ARCH_BCM2835 || COMPILE_TEST
 --- a/drivers/tty/serial/8250/Makefile
 +++ b/drivers/tty/serial/8250/Makefile
 @@ -46,6 +46,7 @@ obj-$(CONFIG_SERIAL_8250_PERICOM)	+= 825