[U-Boot] [PATCH] fsl-ddr: add the macro for Rtt_Nom definition

Kumar Gala galak at kernel.crashing.org
Wed Apr 7 19:34:30 CEST 2010


From: Dave Liu <daveliu at freescale.com>

add the macro definition for Rtt_Nom termination value for DDR3

Signed-off-by: Dave Liu <daveliu at freescale.com>
---
 include/asm-ppc/fsl_ddr_sdram.h |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/include/asm-ppc/fsl_ddr_sdram.h b/include/asm-ppc/fsl_ddr_sdram.h
index 3216a50..02920db 100644
--- a/include/asm-ppc/fsl_ddr_sdram.h
+++ b/include/asm-ppc/fsl_ddr_sdram.h
@@ -1,5 +1,5 @@
 /*
- * Copyright 2008-2009 Freescale Semiconductor, Inc.
+ * Copyright 2008-2010 Freescale Semiconductor, Inc.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
@@ -24,6 +24,12 @@
 #define DDR_OTF		6	/* on-the-fly BC4 and BL8 */
 #define DDR_BL8		8	/* burst length 8 */
 
+#define DDR3_RTT_60_OHM		1 /* RTT_Nom = RZQ/4 */
+#define DDR3_RTT_120_OHM	2 /* RTT_Nom = RZQ/2 */
+#define DDR3_RTT_40_OHM		3 /* RTT_Nom = RZQ/6 */
+#define DDR3_RTT_20_OHM		4 /* RTT_Nom = RZQ/12 */
+#define DDR3_RTT_30_OHM		5 /* RTT_Nom = RZQ/8 */
+
 #if defined(CONFIG_FSL_DDR1)
 #define FSL_DDR_MIN_TCKE_PULSE_WIDTH_DDR	(1)
 typedef ddr1_spd_eeprom_t generic_spd_eeprom_t;
-- 
1.6.0.6



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