nxp: ddr driver enablement for nxp layerscape soc
DDR driver for NXP layerscape SoC(s):
- lx2160aqds
- lx2162aqds
- lx2160ardb
- Other Board with SoC(s) like ls1046a, ls1043a etc;
-- These other boards are not verified yet.
Signed-off-by: Rajesh Bhagat <rajesh.bhagat@nxp.com>
Signed-off-by: York Sun <york.sun@nxp.com>
Signed-off-by: Udit Agarwal <udit.agarwal@nxp.com>
Signed-off-by: Pankaj Gupta <pankaj.gupta@nxp.com>
Change-Id: Ic84a63cb30eba054f432d479862cd4d1097cbbaf
diff --git a/drivers/nxp/ddr/nxp-ddr/README.odt b/drivers/nxp/ddr/nxp-ddr/README.odt
new file mode 100644
index 0000000..8796302
--- /dev/null
+++ b/drivers/nxp/ddr/nxp-ddr/README.odt
@@ -0,0 +1,31 @@
+Table for dynamic ODT for DDR4 with PHY generation 2
+====================================================
+Two-slot system
+Only symmetric configurations are supported for interleaving. Non-symmetric
+configurations are possible but not covered here. First slot empty is possbile
+but prohibited for simplicity.
++-----------------------+-------------+---------------+-----------------------------+-----------------------------+
+| Configuration | |DRAM controller| Slot 1 | Slot 2 |
++-----------+-----------+-------------+-------+-------+--------------+--------------+--------------+--------------+
+| | | | | | Rank 1 | Rank 2 | Rank 1 | Rank 2 |
+| Slot 1 | Slot 2 | Write/Read | Write | Read |-------+------+-------+------+-------+------+-------+------+
+| | | | | | Write | Read | Write | Read | Write | Read | Write | Read |
++-----------+-----------+------+------+-------+-------+-------+------+-------+------+-------+------+-------+------+
+| | | |Rank 1| off | 60 | 240 | off | 60 | 240 | 60 | 60 | 60 | 60 |
+| | |Slot 1|------+-------+-------+-------+------+-------+------+-------+------+-------+------+
+| | | |Rank 2| off | 60 | 60 | 240 | 240 | off | 60 | 60 | 60 | 60 |
+| Dual Rank | Dual Rank |------+------+-------+-------+-------+------+-------+------+-------+------+-------+------+
+| | | |Rank 1| off | 60 | 60 | 60 | 60 | 60 | 240 | off | 60 | 240 |
+| | |Slot 2|------+-------+-------+-------+------+-------+------+-------+------+-------+------+
+| | | |Rank 2| off | 60 | 60 | 60 | 60 | 60 | 60 | 240 | 240 | off |
++-----------+-----------+------+------+-------+-------+-------+------+-------+------+-------+------+-------+------+
+| | | Slot 1 | off | 60 | 80 | off | | | | | | |
+|Single Rank|Single Rank|-------------+-------+-------+-------+------+-------+------+-------+------+-------+------+
+| | | Slot 2 | off | 60 | | | | | 80 | off |
++-----------+-----------+------+------+-------+-------+-------+------+-------+------+-------+------+
+| | | |Rank 1| off | 80 | 80 | off | off | off |
+| Dual Rank | |Slot 1|------+-------+-------+-------+------+-------+------+
+| | | |Rank 2| off | 80 | 80 | off | off | off |
++-----------+-----------+-------------+-------+-------+-------+------+-------+------+
+|Single Rank| | Slot 1 | off | 80 | 80 | off |
++-----------+-----------+-------------+-------+-------+-------+------+