Memory configuration for i.MX8QXP in U-boot

[Maddis]

Hi,

I'm trying to find lpddr4 configuration for imx8qxp-mek -development board from U-boot, but either it's not there or I'm blind because I just can't seem to find it. There is one for imx8m, but that is different CPU and it's not being used. Seems that imx8qxp_mek_config - file is being used.

I see that imx8m devicetree blobs are being generated, but I haven't yet been able to find which one of them are being used (if any at u-boot). 

On i.MX6 it was easy since ddr timing was set at board-configuration file, but not so much no i.MX8 it seems.

Where I can find the lpddr4 config for i.MX8qxp-mek - board in U-boot? U-boot version seems to be u-boot-imx-2017.03.

[_angelo_]

But imx8qxp mek i have here, B0, uses 

MT53B768M32D4DT-062
LPDDR4 24G 768MX32 (3GB) 1.6 GHz

And ddr init in the scfw porting kit seems for 1.2Ghz (imx8qx_dcd_1.2GHz.cfg).

Why ?

[simon_ko]

Hi Joan.

I also want to configure LPDDR4 with i.mx8qxp.
Can I receive the setting excel file?

[joanxie]

simon.ko@wtmec.com, is this your mail address? did you still need the file?

[simon_ko]

Hi joan.

I got the Excel configuration file from NXP Korea.

Thank you for your support.

[joanxie]

I will mail "i.MX8QXP Validation And MEK LPDDR4 Register Programming Aids" to you

[danwright]

Hi Joan-

This might be exactly what I'm looking for too...  can you send these to me as well?  It does not appear that any code of this description is to be found for download...

Thanks!

Dan

[joanxie]

dwright@cumminsallison.com is this your mail address?

[danwright]

No- my email address is:  dan.wright@chargepoint.com.  But I have since convinced myself that the initialization of the DDR is actually in the SCU code.  And I have found this initialization in the imx-scfw-porting-kit-1.2.5 code.

[joanxie]

OK, since you have already figure this out , I don't send any mail to you for this question

[Maddis]

Hi,

This was exactly I was looking for. Thanks!