--- a/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
+++ b/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
@@ -1376,5 +1376,6 @@
 
 #define QCA956X_SGMII_CONFIG_MODE_CTRL_SHIFT	0
 #define QCA956X_SGMII_CONFIG_MODE_CTRL_MASK	0x7
+#define QCA956X_SGMII_CONFIG_MODE_CTRL_SGMII_MAC	0x2
 
 #endif /* __ASM_MACH_AR71XX_REGS_H */
