diff --git a/arch/arm/include/asm/arch-imx8m/imx-regs.h b/arch/arm/include/asm/arch-imx8m/imx-regs.h
index 1559bf6..1818b45 100644
--- a/arch/arm/include/asm/arch-imx8m/imx-regs.h
+++ b/arch/arm/include/asm/arch-imx8m/imx-regs.h
@@ -89,7 +89,13 @@
 #define DDRC_IPS_BASE_ADDR(X)	(0x3d400000 + ((X) * 0x2000000))
 #define DDR_CSD1_BASE_ADDR	0x40000000
 
-#define IOMUXC_GPR_GPR1_GPR_ENET_QOS_INTF_SEL_MASK 0x70000
+#define IOMUXC_GPR_GPR1_GPR_ENET_QOS_RGMII_EN		BIT(21)
+#define IOMUXC_GPR_GPR1_GPR_ENET_QOS_CLK_TX_CLK_SEL	BIT(20)
+#define IOMUXC_GPR_GPR1_GPR_ENET_QOS_CLK_GEN_EN		BIT(19)
+#define IOMUXC_GPR_GPR1_GPR_ENET_QOS_INTF_SEL_MASK	GENMASK(18, 16)
+#define IOMUXC_GPR_GPR1_GPR_ENET_QOS_INTF_SEL_MII	(0 << 16)
+#define IOMUXC_GPR_GPR1_GPR_ENET_QOS_INTF_SEL_RGMII	(1 << 16)
+#define IOMUXC_GPR_GPR1_GPR_ENET_QOS_INTF_SEL_RMII	(4 << 16)
 #define FEC_QUIRK_ENET_MAC
 
 #ifdef CONFIG_ARMV8_PSCI	/* Final jump location */