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ls1088a: ddr: configure DDR for 0.9v for VID support

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When VID feature is supported, check the contents of fuse register
and configure DDR operate at 0.9v.

Signed-off-by: Ashish Kumar <Ashish.Kumar@nxp.com>
Signed-off-by: Rajesh Bhagat <rajesh.bhagat@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>
This commit is contained in:
Rajesh Bhagat 2018-01-17 16:13:07 +05:30 committed by York Sun
parent 554d33f3db
commit 75ad48153f
1 changed files with 21 additions and 0 deletions
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21
board/freescale/ls1088a/ddr.c
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@ -13,6 +13,23 @@
DECLARE_GLOBAL_DATA_PTR;
#if defined(CONFIG_VID) && (!defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD))
static void fsl_ddr_setup_0v9_volt(memctl_options_t *popts)
{
int vdd;
vdd = get_core_volt_from_fuse();
/* Nothing to do for silicons doesn't support VID */
if (vdd < 0)
return;
if (vdd == 900) {
popts->ddr_cdr1 |= DDR_CDR1_V0PT9_EN;
debug("VID: configure DDR to support 900 mV\n");
}
}
#endif
void fsl_ddr_board_options(memctl_options_t *popts,
dimm_params_t *pdimm,
unsigned int ctrl_num)
@ -87,6 +104,10 @@ found:
popts->addr_hash = 1;
popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_60ohm);
#if defined(CONFIG_VID) && (!defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD))
fsl_ddr_setup_0v9_volt(popts);
#endif
popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_60ohm) |
DDR_CDR2_VREF_TRAIN_EN | DDR_CDR2_VREF_RANGE_2;
}