diff --git a/drivers/ethernet/Kconfig.mcux b/drivers/ethernet/Kconfig.mcux
index cf568d66732..5ef754086a9 100644
--- a/drivers/ethernet/Kconfig.mcux
+++ b/drivers/ethernet/Kconfig.mcux
@@ -79,7 +79,9 @@ if PTP_CLOCK_MCUX
 
 config ETH_MCUX_PTP_CLOCK_SRC_HZ
 	int "Frequency of the clock source for the PTP timer"
-	default 50000000
+	default 50000000 if SOC_SERIES_KINETIS_K6X
+	default 50000000 if SOC_SERIES_IMX_RT10XX
+	default 24000000 if SOC_SERIES_IMX_RT11XX
 	help
 	  Set the frequency in Hz sourced to the PTP timer.
 	  If the value is set properly, the timer will be accurate.
diff --git a/soc/arm/nxp_imx/rt/soc_rt11xx.c b/soc/arm/nxp_imx/rt/soc_rt11xx.c
index 2da45050e20..1a2ac1ff572 100644
--- a/soc/arm/nxp_imx/rt/soc_rt11xx.c
+++ b/soc/arm/nxp_imx/rt/soc_rt11xx.c
@@ -367,11 +367,19 @@ static ALWAYS_INLINE void clock_init(void)
 
 
 #ifdef CONFIG_ETH_MCUX
+	/* 50 MHz ENET clock */
 	rootCfg.mux = kCLOCK_ENET1_ClockRoot_MuxSysPll1Div2;
 	rootCfg.div = 10;
 	CLOCK_SetRootClock(kCLOCK_Root_Enet1, &rootCfg);
 #endif
 
+#ifdef CONFIG_PTP_CLOCK_MCUX
+	/* 24MHz PTP clock */
+	rootCfg.mux = kCLOCK_ENET_TIMER1_ClockRoot_MuxOscRc48MDiv2;
+	rootCfg.div = 1;
+	CLOCK_SetRootClock(kCLOCK_Root_Enet_Timer1, &rootCfg);
+#endif
+
 #ifdef CONFIG_SPI_MCUX_LPSPI
 	/* Configure lpspi using Osc48MDiv2 */
 	rootCfg.mux = kCLOCK_LPSPI1_ClockRoot_MuxOscRc48MDiv2;