On Wed, Feb 21, 2018 at 10:14:47AM -0500, Tom Rini wrote:
Also, for transitioning e.g. from MMC to FAT, we would need a mechanism to store to an environment place other than the one selected at load time.
Ah, so we have different valid use cases. Maybe a new env sub-command, switch?
We implemented it by overwriting the priority look up.
The general sunxi case is "We need to move from offset to FAT file" as there's not really generally other valid cases. But on other SoCs we can both say that it's valid to move from eMMC (we put env in an unbootable by the SoC boot partition) to FAT, or not want to move it at all.
Another case I've been thinking of, but would be handled by the code as-is, is the "Beagleboard vs Beagleboard xM" case where the board code needs to check which we're on and keep env on NAND or finally have env on file on FAT". But even then, allowing an explicit switch might be needed, if people want to migrate env to FAT, even on original Beagleboard.
Ah, right. That definitely makes sense.
Maxime