How to change the Register MMDC PHY ODT control Register(MMDCx_MPODTCTRL) (Very Urgent)

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We are very new to this Freescale chipset IMX6.
My requirement is to change the field ODT3_INT_RES for MMDC PHY ODT control Register(MMDCx_MPODTCTRL)

Need to change the value of field ODT3_INT_RES to 001 (Rtt_Nom 120 Ohm).

So, please let me know, how to change the value and where to change in the kernel source code.
Please tell me the file where to change.

Waiting for your reply ASAP.

Thanks in Advance.

Hope that experts will answer me ASAP.

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Best Answer
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Depends on what Linux you use. There are specific board files, where you setup your hardware (usually located at arch/arm/mach-XXX). Freescale has some documentation for it, you will need to find the right one. Here is an example: https://community.freescale.com/docs/DOC-100203

Download the file https://community.freescale.com/servlet/JiveServlet/download/100203-11-272611/BSP_Porting_Guide_L3.0.35_1.1.0.pdf

and check the page 18: Setting UP the IOMUX Controller in Linux. Hope it helps, Robert

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Hi Robert,
Thanks for your reply. I want to know few more details.
I am using
Reference Board : SABRESD
Processor : i.Mx6 Dual Lite

So, can you help me to know, which Board files and source files I have to make changes for setting the filed
ODT3_INT_RES for MMDC PHY ODT control Register(MMDCx_MPODTCTRL). We have to change it to 120Ohms

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