Proposal for a New Command to U-Boot Fuse Programming

[Tom Rini]

On Mon, Jan 06, 2025 at 12:06:25PM +0530, Harsha Vardhan V M wrote:

> I would like to propose a new command for U-Boot's fuse programming
> functionality to address the challenges posed by the current implementation.
> While the existing fuse prog command works well for programming individual
> fuse values, it becomes cumbersome especially when dealing with large-scale
> programming requirements.
> 
> Current Command: fuse prog [-y] <bank> <word> <hexval> [<hexval>...]
> 
> This command programs one or more fuse words starting from a specific <bank>
> and <word> with the hex values given as input.
> 
> While functional, it lacks the efficiency and robustness needed for
> programming a significant number of fuses or handling structured fuse
> configuration data. Repeatedly specifying values for each fuse bank and word
> is not only time-consuming but also prone to errors during manual input or
> scripting. This approach does not leverage the ability to process
> pre-structured data in memory. For users with complex programming needs, the
> current method becomes an obstacle rather than a tool.
> 
> Proposed Command: fuse writebuff

It would be good to provide some documentation links to the fuses that
you're wanting to deal with. What we have now works on a number of
diverse SoCs, even if for some cases it might be best to write a
script that's run rather than copy/paste things live. Any sort of new
mechanism needs to get feedback from users at other semiconductor
vendors to make sure it's generic enough for everyones needs. Thanks.

-- 
Tom
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