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| author | Benoît Thébaudeau <benoit.thebaudeau@advansee.com> | 2013-01-30 11:19:18 +0000 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2013-02-12 13:52:31 +0100 |
| commit | 7c92c540754a0c3756d467a9b0695f2a40d1fe86 (patch) | |
| tree | b237f8cf44bc076ecb3879f57db98f087be64490 | |
| parent | b42b5b7a243ab3923fd80ab03f950f036b6e1329 (diff) | |
| download | u-boot-imx-7c92c540754a0c3756d467a9b0695f2a40d1fe86.zip u-boot-imx-7c92c540754a0c3756d467a9b0695f2a40d1fe86.tar.gz u-boot-imx-7c92c540754a0c3756d467a9b0695f2a40d1fe86.tar.bz2 | |
imx: mx6q DDR3 init: Benefit from available CL = 7
All the users of mx6q_4x_mt41j128.cfg (DDR3-1333H Micron MT41J128M16HA-15E or SK
hynix H5TQ2G63BFR-H9C for i.MX6Q SABRE Lite, and DDR3-1600K Micron
MT41K128M16JT-125:K for i.MX6 SABRE SD) support the optional down binning to
DDR3-1066F (CL = 7, CWL = 6), which is possible at 532 MHz, so use it.
In these conditions:
tRCD(min) = 13.125 ns
tRP(min) = 13.125 ns
tRC(min) = max(tRAS(min, DDR3-1333H), tRAS(min, DDR3-1600K)) + tRP(min)
tRAS(min, DDR3-1333H) = 36 ns
tRAS(min, DDR3-1600K) = 35 ns
MMDC1_MDCFG0.tCL should be set to 7 nCK, encoded as 0x4 in the bit-field
MMDC1_MDCFG0[3:0].
MR0.CL should be set as in MMDC1_MDCFG0.tCL, i.e. to 7 nCK, which is encoded
as 0x6 in MRS.LMR.MR0.{A6:A4, A2} and MMDC1_MDSCR[22:20, 18].
MMDC1_MDCFG1.tCWL should be set to 6 nCK, encoded as 0x4 in the bit-field
MMDC1_MDCFG1[2:0].
MMDC1_MDCFG1.tRCD should be set to 13.125 ns, which is 7 nCK at 532 MHz, encoded
as 0x6 in the bit-field MMDC1_MDCFG1[31:29].
MMDC1_MDCFG1.tRP should be set to 13.125 ns, which is 7 nCK at 532 MHz, encoded
as 0x6 in the bit-field MMDC1_MDCFG1[28:26].
MMDC1_MDCFG1.tRC should be set to 49.125 ns, which is 27 nCK at 532 MHz, encoded
as 0x1A in the bit-field MMDC1_MDCFG1[25:21].
Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
| -rw-r--r-- | board/freescale/imx/ddr/mx6q_4x_mt41j128.cfg | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/board/freescale/imx/ddr/mx6q_4x_mt41j128.cfg b/board/freescale/imx/ddr/mx6q_4x_mt41j128.cfg index d50858d..f4cae5e 100644 --- a/board/freescale/imx/ddr/mx6q_4x_mt41j128.cfg +++ b/board/freescale/imx/ddr/mx6q_4x_mt41j128.cfg @@ -109,8 +109,8 @@ DATA 4 0x021b4828 0x33333333 DATA 4 0x021b0018 0x00081740 DATA 4 0x021b001c 0x00008000 -DATA 4 0x021b000c 0x555A7975 -DATA 4 0x021b0010 0xFF538F64 +DATA 4 0x021b000c 0x555A7974 +DATA 4 0x021b0010 0xDB538F64 DATA 4 0x021b0014 0x01FF00DB DATA 4 0x021b002c 0x000026D2 @@ -126,8 +126,8 @@ DATA 4 0x021b001c 0x00008033 DATA 4 0x021b001c 0x0000803B DATA 4 0x021b001c 0x00428031 DATA 4 0x021b001c 0x00428039 -DATA 4 0x021b001c 0x19408030 -DATA 4 0x021b001c 0x19408038 +DATA 4 0x021b001c 0x19308030 +DATA 4 0x021b001c 0x19308038 DATA 4 0x021b001c 0x04008040 DATA 4 0x021b001c 0x04008048 |