diff --git a/boards/arm/lpcxpresso55s69/pinmux.c b/boards/arm/lpcxpresso55s69/pinmux.c
index 8dbce690327..eb58e81454f 100644
--- a/boards/arm/lpcxpresso55s69/pinmux.c
+++ b/boards/arm/lpcxpresso55s69/pinmux.c
@@ -13,6 +13,8 @@ static int lpcxpresso_55s69_pinmux_init(const struct device *dev)
 {
 	ARG_UNUSED(dev);
 
+#ifdef CONFIG_BOARD_LPCXPRESSO55S69_CPU0
+/* Only CPU0 configures GPIO port inputs. */
 #ifdef CONFIG_PINMUX_MCUX_LPC_PORT0
 	const struct device *port0 =
 		device_get_binding(CONFIG_PINMUX_MCUX_LPC_PORT0_NAME);
@@ -22,6 +24,7 @@ static int lpcxpresso_55s69_pinmux_init(const struct device *dev)
 	const struct device *port1 =
 		device_get_binding(CONFIG_PINMUX_MCUX_LPC_PORT1_NAME);
 #endif
+#endif
 
 #if DT_NODE_HAS_COMPAT_STATUS(DT_NODELABEL(flexcomm0), nxp_lpc_usart, okay) && CONFIG_SERIAL
 	/* USART0 RX,  TX */
diff --git a/soc/arm/nxp_lpc/lpc55xxx/Kconfig.defconfig.lpc55S69_cpu1 b/soc/arm/nxp_lpc/lpc55xxx/Kconfig.defconfig.lpc55S69_cpu1
index 196ac583443..5a99f3b2c3d 100644
--- a/soc/arm/nxp_lpc/lpc55xxx/Kconfig.defconfig.lpc55S69_cpu1
+++ b/soc/arm/nxp_lpc/lpc55xxx/Kconfig.defconfig.lpc55S69_cpu1
@@ -9,16 +9,19 @@ config SOC
 	default "lpc55S69_cpu1"
 
 config PINMUX_MCUX_LPC
-	default n
+	default y
 	depends on PINMUX
 
 config GPIO
-	default n
+	default y
 
 config GPIO_MCUX_LPC
-	default n
+	default y
 	depends on GPIO
 
+config SERIAL
+	default n
+
 config UART_MCUX_FLEXCOMM
 	default n
 	depends on SERIAL