EVMK2EX: Use on die ECC instead of K2E's ECC.

saurabh prajapati

Prodigy 140 points

Part Number: EVMK2EX

Hi,

We have a custom board based on EVMK2EX with a MT29F8G08ADAFAH4-AAT:FTR NAND chip.

As per this link

https://in.micron.com/support/tools-and-utilities/slc-nand-cross-reference-tool

We observe that the NAND chip requires either 8 bit ECC or On die ECC.

As per the below forum post:

NAND issue in K2E board - Processors forum - Processors - TI E2E support forums

K2E board doesn't support 8 bit ECC so the only option is to use On Die ECC.

Our Kernel Version is 4.4.32 and we are not able to find patches to use On Die ECC.

Is there any way we can do this?

over 2 years ago

0 Shankari G over 2 years ago

TI__Mastermind 25535 points

Saurabh,

Welcome to TI E2E Forum support.

Thanks for posting your query here.

One of our Engineers, is working on your query. He will post his reply soon.

Regards

Shankari G

0 Rajarajan Uthayakumar over 2 years ago

TI__Expert 4314 points

Hi Saurabh,

I looked at the K2E device tree in the linux kernel and it seems that ECC can be enabled / disabled with the following setting as described in the device tree binding documentation.

- nand-ecc-mode: operation mode of the NAND ecc mode. ECC mode
valid values for davinci driver:
- "none"
- "soft"
- "hw"

Thanks,

Rajarajan U

0 saurabh prajapati over 2 years ago in reply to Rajarajan Uthayakumar

Prodigy 140 points

Hi Raj,

We have already looked into this and tried out these modes.

As the K2E board doesn't support 8bit ECC (correct me if I'm wrong) we need to use On Die ECC, the one that's on the NAND chip.

Please provide details on how this must be implemented.

0 Rajarajan Uthayakumar over 2 years ago in reply to saurabh prajapati

TI__Expert 4314 points

Hi Saurabh,

saurabh prajapati said:
As the K2E board doesn't support 8bit ECC (correct me if I'm wrong) we need to use On Die ECC, the one that's on the NAND chip.

Sorry for not providing the details clearly, the steps that I have mentioned above are for On-die ECC. Yes, K2E doesn't support 8bit ECC.

Thanks,

Rajarajan U