Enable redundant u-boot environment for iMX6 (Yocto)

Hello,

I'm looking to enable a redundancy enabled "ping-pong" u-boot environment for my iMX6 (VAR-SOM-MX6 CPU: NXP/Freescale iMX6) to ensure that if there was system failure that there will always be a CRC checked and valid environment available in NAND flash. I have read the documentation and noticed that there is the available functionality of CONFIG_ENV_ADDR_REDUND and CONFIG_ENV_SIZE_REDUND.

My questions are; how do I determine my redundant address and size? Should they just match my original defines? I am using a custom mtd partition sizing which I have configured by the use of a sw-description file (using swupdate to handle the update process), will there be any issues that can be foreseen?

Also, because I am using Yocto (I know this is outside the scope of u-boot) would it be wise to add a patch or append file within Yocto? or simply host this in a separate repository?

Any help would be greatly appreciated, I cannot find any in depth documentation relating to this so I am looking for any resources available.

Regards,
Brendan

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