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Compiler/DRA745: dra745 config ddr as 32 bit

Part Number: DRA745

Tool/software: TI C/C++ Compiler

My hardware is dra745 custom board

software is : ti-processor-sdk-linux-automotive-dra7xx-evm-03_04_00_03

In order to cost down, I want to change ddr from 64bit to 32bit.

Only one emif is running.

I make a test on vayu evm board ver H:

on uboot emif-common.c function dmm_init

set variable emif2_enabled as 0 

but it no work, uboot unabled to run. nothing on consle.

  Can it be achieved?

If yes, how to implement it?