diff --git a/include/dt-bindings/net/mscc-phy-vsc8531.h b/include/dt-bindings/net/mscc-phy-vsc8531.h
index 61f5287d752..c340437414f 100644
--- a/include/dt-bindings/net/mscc-phy-vsc8531.h
+++ b/include/dt-bindings/net/mscc-phy-vsc8531.h
@@ -28,13 +28,4 @@
 #define VSC8531_FORCE_LED_OFF			14
 #define VSC8531_FORCE_LED_ON			15
 
-#define VSC8531_RGMII_CLK_DELAY_0_2_NS	0
-#define VSC8531_RGMII_CLK_DELAY_0_8_NS	1
-#define VSC8531_RGMII_CLK_DELAY_1_1_NS	2
-#define VSC8531_RGMII_CLK_DELAY_1_7_NS	3
-#define VSC8531_RGMII_CLK_DELAY_2_0_NS	4
-#define VSC8531_RGMII_CLK_DELAY_2_3_NS	5
-#define VSC8531_RGMII_CLK_DELAY_2_6_NS	6
-#define VSC8531_RGMII_CLK_DELAY_3_4_NS	7
-
 #endif