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armv8/ls2080ardb: Update DDR settings for four chip-select case

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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>
This commit is contained in:
York Sun 2015-11-04 10:03:23 -08:00
parent c4243ac9e2
commit 3901978d42
1 changed files with 12 additions and 4 deletions
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16
board/freescale/ls2080ardb/ddr.c
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@ -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);