[U-Boot-Users] [PATCH] Allow console input to be disabled

[Mark Jackson <mpfj@mimc.co.uk>]

Wolfgang Denk wrote:
> Dear Jerry Van Baren,
> 
> In message <489AEDF7.9000400@ge.com> you wrote:
>> For what it is worth, I'm with Haavard - it seems useful.  WRT the 
>> dangerous part - it's intended use is for debug, so presumably it will 
> 
> It may be intended for debug, but it's available there without warning
> for the end user.

Is there some "warning" mechanism I should use ?

>> be the developer that locks himself out of the console and will have the 
>> tools to break back in.  From that POV, it isn't any more dangerous than 
>> all the other ways a user/developer can brick a board (starting with 
>> erasing flash ;-).
> 
> I think this one is a bit nastier. It's like this rope hanging out of
> a black box labeled "silencer". The label  doesn't  mention  that  it
> goes "KABOOOOM!" first, before there is a big silence (and a cloud of
> dust and a pile of debris).

I agree that it could all go very wrong, but it was a quick and easy way for me to implement that particular feature.

Does anyone have any suggestions on how to achieve the same outcome in a less "hoist by your own petard" way ?

Mark