AM4372: u-boot saveenv command erases existing EMMC partitions.

siva nallamalli

Part Number: AM4372
Other Parts Discussed in Thread: AM3358

Tool/software:

I am working on am437x based custom board which is already in production, and we are migrating to 6.1 kernel and u-boot 2024.

With EMMC boot mode, when we give saveenv command on u-boot environment. after that existing EMMC partitions are not visible with mmc command.

After the reboot board was not boot up, we figured out by doing a usbboot and observed that partitions & content not available.

5 months ago

0 Hong Guan64 5 months ago

TI__Guru 65135 points

What is the TI SDK version used?
Best,
-Hong

0 siva nallamalli 5 months ago in reply to Hong Guan64

Intellectual 860 points

Hi Hong

Sorry for the delayed response as i am ooo.

We tried using the TI SDK: 9.00.00.006 with yocto build set up.

1	bitbake	0c6f86b60cfba67c20733516957c0a654eb2b44c	https://git.openembedded.org
2	meta-ti	2e3ffb73630f4ff78227822bdb4c23e75a720223	https://git.yoctoproject.org
3	meta-arm	96aad3b29aa7a5ee4df5cf617a6336e5218fa9bd	https://git.yoctoproject.org
4	meta-arago	e1d3561ec681fd05509affa063e0d6212f1571d1	https://git.yoctoproject.org
5	meta-openembedded	346753705e49a2486867dc150181a1c7f4d69377	https://git.openembedded.org
6	meta-virtualization	b3b3dbc67504e8cd498d6db202ddcf5a9dd26a9d	https://git.yoctoproject.org
7	openembedded-core	f20a12ead2d5890e88e7f4ce149a777de47edc48	https://git.openembedded.org
8	meta-processor-sdk	9dad5765d33783f940ba3c32f4fc431e2b308621	git.ti.com/.../processor-sdk
9	meta-edgeai	a1d9091cd914ce0bc69958891628a4cf86ed3e96	https://git.ti.com/git/edgeai

Regards,

Siva.

0 Hong Guan64 5 months ago in reply to siva nallamalli

TI__Guru 65135 points

"saveenv" is not supported in newer SDK.
https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1304187/am625-saveenv-throws-error-exceeds-max-0x2000/4953387#4953387
Best,
-Hong

0 siva nallamalli 5 months ago in reply to Hong Guan64

Intellectual 860 points

Hi Huang,

With same SDK there is another board based on am3358 processor with u-boot 2023. There saveenv is working fine.

Could you please let us know from which sdk it is supported.

This ticket talks about error message with saveenv dueto size. In my case there is no error, But partitions and content get erased after saveenv which is wierd.

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1304187/am625-saveenv-throws-error-exceeds-max-0x2000/4953387#4953387

Regards,

Siva.

0 Hong Guan64 5 months ago in reply to siva nallamalli

TI__Guru 65135 points

I'd recommend using alternative options instead of "saveenv" if possible.
Here're few alternatives:
- use "env export..." and "env import...",
- modify u-boot environment variables as necessary, and re-build u-boot
Best,
-Hong