diff options
| author | York Sun <yorksun@freescale.com> | 2014-09-11 20:32:07 (GMT) |
|---|---|---|
| committer | York Sun <yorksun@freescale.com> | 2014-09-25 16:12:12 (GMT) |
| commit | c7eae7fcb11bc7dab519fca8d8902f1fbc5c3c76 (patch) | |
| tree | 1a521d509a9752c0f279416c7d54c98c1d854068 /board/freescale/ls1021aqds/ddr.c | |
| parent | f80d6472b47e73e35e4eaed6fc56ce5df2c82cdb (diff) | |
| download | u-boot-c7eae7fcb11bc7dab519fca8d8902f1fbc5c3c76.tar.xz | |
board/ls1021aqds: Add DDR4 support
LS1021AQDS has a variant with DDR4 slot. This patch adds a new defconfig
for this variant to enable DDR4 support. RAW timing parameters are not
added for DDR4. The board timing parameters are only tuned for single-
rank 1600 and 1800MT/s with Micron DIMM 9ASF51272AZ-2G1A1 due to DIMM
availability.
Signed-off-by: York Sun <yorksun@freescale.com>
CC: Alison Wang <alison.wang@freescale.com>
Diffstat (limited to 'board/freescale/ls1021aqds/ddr.c')
| -rw-r--r-- | board/freescale/ls1021aqds/ddr.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/board/freescale/ls1021aqds/ddr.c b/board/freescale/ls1021aqds/ddr.c index 679c654..5898e33 100644 --- a/board/freescale/ls1021aqds/ddr.c +++ b/board/freescale/ls1021aqds/ddr.c @@ -79,7 +79,6 @@ found: */ popts->wrlvl_override = 1; popts->wrlvl_sample = 0xf; - popts->cswl_override = DDR_CSWL_CS0; /* * Rtt and Rtt_WR override @@ -89,9 +88,17 @@ found: /* Enable ZQ calibration */ popts->zq_en = 1; +#ifdef CONFIG_SYS_FSL_DDR4 + popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_80ohm); + popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_80ohm) | + DDR_CDR2_VREF_OVRD(70); /* Vref = 70% */ +#else + popts->cswl_override = DDR_CSWL_CS0; + /* DHC_EN =1, ODT = 75 Ohm */ popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_75ohm); popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_75ohm); +#endif } #ifdef CONFIG_SYS_DDR_RAW_TIMING |