v4.19.13 snapshot.
diff --git a/include/dt-bindings/clock/rk3399-ddr.h b/include/dt-bindings/clock/rk3399-ddr.h
new file mode 100644
index 0000000..ed22808
--- /dev/null
+++ b/include/dt-bindings/clock/rk3399-ddr.h
@@ -0,0 +1,56 @@
+/* SPDX-License-Identifier: (GPL-2.0+ OR MIT) */
+
+#ifndef DT_BINDINGS_DDR_H
+#define DT_BINDINGS_DDR_H
+
+/*
+ * DDR3 SDRAM Standard Speed Bins include tCK, tRCD, tRP, tRAS and tRC for
+ * each corresponding bin.
+ */
+
+/* DDR3-800 (5-5-5) */
+#define DDR3_800D 0
+/* DDR3-800 (6-6-6) */
+#define DDR3_800E 1
+/* DDR3-1066 (6-6-6) */
+#define DDR3_1066E 2
+/* DDR3-1066 (7-7-7) */
+#define DDR3_1066F 3
+/* DDR3-1066 (8-8-8) */
+#define DDR3_1066G 4
+/* DDR3-1333 (7-7-7) */
+#define DDR3_1333F 5
+/* DDR3-1333 (8-8-8) */
+#define DDR3_1333G 6
+/* DDR3-1333 (9-9-9) */
+#define DDR3_1333H 7
+/* DDR3-1333 (10-10-10) */
+#define DDR3_1333J 8
+/* DDR3-1600 (8-8-8) */
+#define DDR3_1600G 9
+/* DDR3-1600 (9-9-9) */
+#define DDR3_1600H 10
+/* DDR3-1600 (10-10-10) */
+#define DDR3_1600J 11
+/* DDR3-1600 (11-11-11) */
+#define DDR3_1600K 12
+/* DDR3-1600 (10-10-10) */
+#define DDR3_1866J 13
+/* DDR3-1866 (11-11-11) */
+#define DDR3_1866K 14
+/* DDR3-1866 (12-12-12) */
+#define DDR3_1866L 15
+/* DDR3-1866 (13-13-13) */
+#define DDR3_1866M 16
+/* DDR3-2133 (11-11-11) */
+#define DDR3_2133K 17
+/* DDR3-2133 (12-12-12) */
+#define DDR3_2133L 18
+/* DDR3-2133 (13-13-13) */
+#define DDR3_2133M 19
+/* DDR3-2133 (14-14-14) */
+#define DDR3_2133N 20
+/* DDR3 ATF default */
+#define DDR3_DEFAULT 21
+
+#endif