diff options
| author | Benoît Thébaudeau <benoit.thebaudeau@advansee.com> | 2013-01-30 11:19:14 +0000 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2013-02-12 13:52:30 +0100 |
| commit | aa53149e1108ab9395ee8309ce6f90480bfdf34b (patch) | |
| tree | 2353fac130d22844bf03a50b7304899f48963d17 /board/freescale/p2041rdb/eth.c | |
| parent | 6904e377465db6c731adf4fb0eb67e55454606d7 (diff) | |
| download | u-boot-imx-aa53149e1108ab9395ee8309ce6f90480bfdf34b.zip u-boot-imx-aa53149e1108ab9395ee8309ce6f90480bfdf34b.tar.gz u-boot-imx-aa53149e1108ab9395ee8309ce6f90480bfdf34b.tar.bz2 | |
imx: mx6q DDR3 init: Fix tXPR
MMDC1_MDOR.tXPR should be set as specified for the JEDEC DDR3 timing tXPR.
For all DDR3 speed bins:
tXPR(min) = max(5 nCK, tRFC(min) + 10 ns)
tRFC(2 Gb) = 160 ns
All the users of mx6q_4x_mt41j128.cfg have a 2-Gb density (Micron
MT41J128M16HA-15E or SK hynix H5TQ2G63BFR-H9C for i.MX6Q SABRE Lite, and Micron
MT41K128M16JT-125:K for i.MX6 SABRE SD).
Hence, MMDC1_MDOR.tXPR should be set to max(5 nCK, 170 ns), which is 170 ns
and 91 nCK at 532 MHz, encoded as 0x5A in the bit-field MMDC1_MDOR[23:16].
Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Diffstat (limited to 'board/freescale/p2041rdb/eth.c')
0 files changed, 0 insertions, 0 deletions