diff --git a/soc/arm/nxp_imx/rt/soc_rt10xx.c b/soc/arm/nxp_imx/rt/soc_rt10xx.c
index 7df476a417f312..914d568563f184 100644
--- a/soc/arm/nxp_imx/rt/soc_rt10xx.c
+++ b/soc/arm/nxp_imx/rt/soc_rt10xx.c
@@ -199,9 +199,14 @@ static ALWAYS_INLINE void clock_init(void)
 
 
 #if DT_NODE_HAS_STATUS(DT_NODELABEL(enet), okay) && CONFIG_NET_L2_ETHERNET
+#if CONFIG_ETH_MCUX_RMII_EXT_CLK
+	/* Enable clock input for ENET1 */
+	IOMUXC_EnableMode(IOMUXC_GPR, kIOMUXC_GPR_ENET1TxClkOutputDir, false);
+#else
 	/* Enable clock output for ENET1 */
 	IOMUXC_EnableMode(IOMUXC_GPR, kIOMUXC_GPR_ENET1TxClkOutputDir, true);
 #endif
+#endif
 
 #if DT_NODE_HAS_STATUS(DT_NODELABEL(enet2), okay) && CONFIG_NET_L2_ETHERNET
 	/* Set ENET2 ref clock to be generated by External OSC,*/