How to set DDR frequency to 400MHz on imx6Q

[songyonglai]

Hi :

  The imx6q DDR frequency is 528Mhz. I want to set DDR to run on 400MHz , how to modify the uboot config file mx6q_4x_mt41j128.cfg, or I should modify another file.    I use the fsl android sdk imx6q-N7.1.1-1.0.0.

  Thanks very much.

[igorpadykov]

Hi yonglai

one can try solutions provided on

How to change DDR3 clock speed in U-boot/U-boot SPL? 

https://community.nxp.com/thread/306143 

Best regards
igor
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[songyonglai]

Hi igorpadykov:

    Thanks for your reply,  I modified the plugin.S file as follows, but it did not work,  am I right? Thanks very much.

#elif defined (CONFIG_MX6Q)

    /*imx6dqsabresd_ddr_settting*/

    imx6dlsabresd_ddr_setting

#else

    #error "SOC not configured"

#endif