diff options
| author | York Sun <yorksun@freescale.com> | 2015-11-04 10:03:22 -0800 |
|---|---|---|
| committer | York Sun <yorksun@freescale.com> | 2015-12-13 18:27:28 -0800 |
| commit | c4243ac9e2713897a63dcdc3a96bf088fdb49866 (patch) | |
| tree | ff5766eef6dc2f238791a238bccbc484941373cc /board/freescale | |
| parent | 6c6e006a2083f2da7b4f66c6bb82ce8b3fb713a3 (diff) | |
armv8/ls2080aqds: Update DDR settings for four chip-select case
When 4 chip-selects are used, vref should use range 1 and CDT uses 80 ohm,
and 2T timing is enabled.
Signed-off-by: York Sun <yorksun@freescale.com>
Diffstat (limited to 'board/freescale')
| -rw-r--r-- | board/freescale/ls2080aqds/ddr.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/board/freescale/ls2080aqds/ddr.c b/board/freescale/ls2080aqds/ddr.c index ae681de35e..7e67ee0335 100644 --- a/board/freescale/ls2080aqds/ddr.c +++ b/board/freescale/ls2080aqds/ddr.c @@ -134,10 +134,18 @@ found: popts->zq_en = 1; if (ddr_freq < 2350) { - popts->ddr_cdr1 = DDR_CDR1_DHC_EN | - DDR_CDR1_ODT(DDR_CDR_ODT_60ohm); - popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_60ohm) | - DDR_CDR2_VREF_RANGE_2; + if (pdimm[0].n_ranks == 2 && pdimm[1].n_ranks == 2) { + /* four chip-selects */ + popts->ddr_cdr1 = DDR_CDR1_DHC_EN | + DDR_CDR1_ODT(DDR_CDR_ODT_80ohm); + popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_80ohm); + popts->twot_en = 1; /* enable 2T timing */ + } else { + popts->ddr_cdr1 = DDR_CDR1_DHC_EN | + DDR_CDR1_ODT(DDR_CDR_ODT_60ohm); + popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_60ohm) | + DDR_CDR2_VREF_RANGE_2; + } } else { popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_100ohm); |