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

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>

diff --git a/board/freescale/ls1088a/ddr.c b/board/freescale/ls1088a/ddr.c
index e24bfd557c637904598646787517e8b28492466b..2240454ec893d9619865d1131b15492fe74f5991 100644 (file)
--- a/board/freescale/ls1088a/ddr.c
+++ b/board/freescale/ls1088a/ddr.c
@@ -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;
 }