DDR device tree included in CubeMx is non existent

[SKris]

We are trying to bring up a custom board which used STM32MP157FACx processor.

The DDR memory model we use is W63AH2NBVABE which is a LPDDR3 32-bit. We use CubeMx to generate the device trees. We have chosen the configuration shown below in the picture in CubeMx which generated tf-a device trees and one of them (stm32mp157f-projectname-mx-fw-config.dts) included the following device tree, which is non-existent.

#include "stm32mp15-ddr-128m-fw-config.dts"

The above device tree is not available in the tf-a source in the developer package (Developer-Package/stm32mp1-openstlinux-5.10-dunfell-mp1-21-03-31/sources/arm-ostl-linux-gnueabi/tf-a-stm32mp-2.4.r1-r0/tf-a-sources/fdts) or in the git.

How do we get this file? Does it expect the developer/user to create one? if so, why does the comment not let the user know that?

Any pointers would be much appreciated.

 

Thanks!

[Olivier GALLIEN]

Hi @SKris​ ,

Can you tell me which version of OpenSTLinux and CubeMX you are using ?

Thanks

Olivier

[Olivier GALLIEN · Accepted solution]

Sorry I read 5.10-dunfell-mp1-21-03-3, so Ecosystem 3.0.

This bug is fixed in release 3.1. ( OSTL 5.10-dunfell-mp1-21-11-17 and CubeMX 6.4 )

If you don't want to upgrade, you indeed need to create this file at you end taking exemple from the one provided by ST for DK and EV1 board ( 512m and 1G density )

Olivier

[SKris]

Hi Oliver.

Thank you for the information.

We did see the latest tf-a patch which has a new file "stm32mp15-fw-config.dts" and configures DDR by including this file and the DDR size in a macro, making it simpler.

We moved our code to latest tf-a tag and updated our CubeMx tool to latest and our issues is resolved.

Thanks,

Shalini