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-rw-r--r--include/fsl_ddr_sdram.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/include/fsl_ddr_sdram.h b/include/fsl_ddr_sdram.h
index c79fce0898..4b022d4639 100644
--- a/include/fsl_ddr_sdram.h
+++ b/include/fsl_ddr_sdram.h
@@ -33,6 +33,15 @@
#define DDR3_RTT_20_OHM 4 /* RTT_Nom = RZQ/12 */
#define DDR3_RTT_30_OHM 5 /* RTT_Nom = RZQ/8 */
+#define DDR4_RTT_OFF 0
+#define DDR4_RTT_60_OHM 1 /* RZQ/4 */
+#define DDR4_RTT_120_OHM 2 /* RZQ/2 */
+#define DDR4_RTT_40_OHM 3 /* RZQ/6 */
+#define DDR4_RTT_240_OHM 4 /* RZQ/1 */
+#define DDR4_RTT_48_OHM 5 /* RZQ/5 */
+#define DDR4_RTT_80_OHM 6 /* RZQ/3 */
+#define DDR4_RTT_34_OHM 7 /* RZQ/7 */
+
#define DDR2_RTT_OFF 0
#define DDR2_RTT_75_OHM 1
#define DDR2_RTT_150_OHM 2
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