diff --git a/boards/arm/lpcxpresso55s69/doc/index.rst b/boards/arm/lpcxpresso55s69/doc/index.rst
index 4e7c1494b68..beacd0efad4 100644
--- a/boards/arm/lpcxpresso55s69/doc/index.rst
+++ b/boards/arm/lpcxpresso55s69/doc/index.rst
@@ -113,6 +113,8 @@ functionality of a pin.
 +=========+=================+============================+
 | PIO0_26 | SPI             | SPI MOSI                   |
 +---------+-----------------+----------------------------+
+| PIO0_27 | USART           | USART TX                   |
++---------+-----------------+----------------------------+
 | PIO0_29 | USART           | USART RX                   |
 +---------+-----------------+----------------------------+
 | PIO0_30 | USART           | USART TX                   |
@@ -133,6 +135,8 @@ functionality of a pin.
 +---------+-----------------+----------------------------+
 | PIO1_21 | I2C             | I2C SDA                    |
 +---------+-----------------+----------------------------+
+| PIO1_24 | USART           | USART RX                   |
++---------+-----------------+----------------------------+
 
 Memory mappings
 ===============
diff --git a/boards/arm/lpcxpresso55s69/lpcxpresso55s69.dtsi b/boards/arm/lpcxpresso55s69/lpcxpresso55s69.dtsi
index e7b4bb356a9..ad6a54c782a 100644
--- a/boards/arm/lpcxpresso55s69/lpcxpresso55s69.dtsi
+++ b/boards/arm/lpcxpresso55s69/lpcxpresso55s69.dtsi
@@ -163,6 +163,11 @@ arduino_i2c: &flexcomm4 {
 	};
 };
 
+arduino_serial: &flexcomm2 {
+	compatible = "nxp,lpc-usart";
+	current-speed = <115200>;
+};
+
 arduino_spi: &hs_lspi {
 };
 
diff --git a/boards/arm/lpcxpresso55s69/lpcxpresso55s69_cpu0.yaml b/boards/arm/lpcxpresso55s69/lpcxpresso55s69_cpu0.yaml
index b193c24aecb..782d4024514 100644
--- a/boards/arm/lpcxpresso55s69/lpcxpresso55s69_cpu0.yaml
+++ b/boards/arm/lpcxpresso55s69/lpcxpresso55s69_cpu0.yaml
@@ -17,6 +17,7 @@ toolchain:
 supported:
   - adc
   - arduino_i2c
+  - arduino_serial
   - arduino_spi
   - gpio
   - i2c
diff --git a/boards/arm/lpcxpresso55s69/pinmux.c b/boards/arm/lpcxpresso55s69/pinmux.c
index 96d1ba0f8b9..fd471a889de 100644
--- a/boards/arm/lpcxpresso55s69/pinmux.c
+++ b/boards/arm/lpcxpresso55s69/pinmux.c
@@ -53,6 +53,30 @@ static int lpcxpresso_55s69_pinmux_init(const struct device *dev)
 
 #endif
 
+#if DT_NODE_HAS_COMPAT_STATUS(DT_NODELABEL(flexcomm2), nxp_lpc_usart, okay) && CONFIG_SERIAL
+	/* USART2 RX,  TX */
+	uint32_t port1_pin24_config = (
+			IOCON_PIO_FUNC1 |
+			IOCON_PIO_MODE_INACT |
+			IOCON_PIO_INV_DI |
+			IOCON_PIO_DIGITAL_EN |
+			IOCON_PIO_SLEW_STANDARD |
+			IOCON_PIO_OPENDRAIN_DI
+			);
+
+	uint32_t port0_pin27_config = (
+			IOCON_PIO_FUNC1 |
+			IOCON_PIO_MODE_INACT |
+			IOCON_PIO_INV_DI |
+			IOCON_PIO_DIGITAL_EN |
+			IOCON_PIO_SLEW_STANDARD |
+			IOCON_PIO_OPENDRAIN_DI
+			);
+
+	pinmux_pin_set(port1, 24, port1_pin24_config);
+	pinmux_pin_set(port0, 27, port0_pin27_config);
+#endif
+
 #if DT_PHA_HAS_CELL(DT_ALIAS(sw0), gpios, pin)
 	uint32_t sw0_config = (
 			IOCON_PIO_FUNC0 |
diff --git a/soc/arm/nxp_lpc/lpc55xxx/soc.c b/soc/arm/nxp_lpc/lpc55xxx/soc.c
index 7b4277f1ff2..38a835fba57 100644
--- a/soc/arm/nxp_lpc/lpc55xxx/soc.c
+++ b/soc/arm/nxp_lpc/lpc55xxx/soc.c
@@ -64,6 +64,10 @@ static ALWAYS_INLINE void clock_init(void)
 	/* Enables the clock for the I/O controller.: Enable Clock. */
     CLOCK_EnableClock(kCLOCK_Iocon);
 
+#if DT_NODE_HAS_COMPAT_STATUS(DT_NODELABEL(flexcomm2), nxp_lpc_usart, okay)
+	CLOCK_AttachClk(kFRO12M_to_FLEXCOMM2);
+#endif
+
 #if DT_NODE_HAS_COMPAT_STATUS(DT_NODELABEL(flexcomm4), nxp_lpc_i2c, okay)
 	/* attach 12 MHz clock to FLEXCOMM4 */
 	CLOCK_AttachClk(kFRO12M_to_FLEXCOMM4);