diff --git a/include/linux/rockchip/cpu.h b/include/linux/rockchip/cpu.h
index 0cd6f673c4d9..c6be2c96ed84 100644
--- a/include/linux/rockchip/cpu.h
+++ b/include/linux/rockchip/cpu.h
@@ -26,6 +26,7 @@
 #define ROCKCHIP_CPU_RK312X		0x31260000
 #define ROCKCHIP_CPU_RK3288		0x32880000
 #define ROCKCHIP_CPU_RK3308		0x33080000
+#define ROCKCHIP_CPU_RK3518		0x35180000
 #define ROCKCHIP_CPU_RK3528		0x35280000
 #define ROCKCHIP_CPU_RK3566		0x35660000
 #define ROCKCHIP_CPU_RK3567		0x35670000
@@ -185,8 +186,16 @@ static inline bool cpu_is_rk3528(void)
 	return of_machine_is_compatible("rockchip,rk3528") ||
 	       of_machine_is_compatible("rockchip,rk3528a");
 }
+
+static inline bool cpu_is_rk3518(void)
+{
+	if (rockchip_soc_id)
+		return (rockchip_soc_id & ROCKCHIP_CPU_MASK) == ROCKCHIP_CPU_RK3518;
+	return of_machine_is_compatible("rockchip,rk3518");
+}
 #else
 static inline bool cpu_is_rk3528(void) { return false; }
+static inline bool cpu_is_rk3518(void) { return false; }
 #endif
 
 #if defined(CONFIG_CPU_RK3568)
@@ -232,6 +241,7 @@ static inline bool cpu_is_rk3568(void) { return false; }
 #define ROCKCHIP_SOC_RK3308	(ROCKCHIP_CPU_RK3308 | 0x00)
 #define ROCKCHIP_SOC_RK3308B	(ROCKCHIP_CPU_RK3308 | 0x01)
 #define ROCKCHIP_SOC_RK3308BS	(ROCKCHIP_CPU_RK3308 | 0x02)
+#define ROCKCHIP_SOC_RK3518	(ROCKCHIP_CPU_RK3518 | 0x00)
 #define ROCKCHIP_SOC_RK3528	(ROCKCHIP_CPU_RK3528 | 0x00)
 #define ROCKCHIP_SOC_RK3528A	(ROCKCHIP_CPU_RK3528 | 0x01)
 #define ROCKCHIP_SOC_RK3566	(ROCKCHIP_CPU_RK3566 | 0x00)
@@ -263,6 +273,7 @@ ROCKCHIP_SOC(RK3288, rk3288w, RK3288W)
 ROCKCHIP_SOC(RK3308, rk3308, RK3308)
 ROCKCHIP_SOC(RK3308, rk3308b, RK3308B)
 ROCKCHIP_SOC(RK3308, rk3308bs, RK3308BS)
+ROCKCHIP_SOC(RK3518, rk3518, RK3518)
 ROCKCHIP_SOC(RK3528, rk3528, RK3528)
 ROCKCHIP_SOC(RK3528, rk3528a, RK3528A)
 ROCKCHIP_SOC(RK3568, rk3566, RK3566)