[PATCH] tiny-printf: Add support for upper case hex values

[Michael Walle]

Hi,

> The issue is that disabling TINY_PRINTF may not be possible (size 
> constraints) and some code is compiled for different stages and people 
> typically don't check whether the format used in printf is valid with 
> tiny_printf. I've had this issue already in the past, I vaguely recall 
> "complaining" about it on IRC.

Yes, I've stumbled on "%pa" with tiny printf (i.e. in
drivers/pinctrl/pinctrl-single.c) which is printing the very wrong
value, actually :) So printing anything unknown as '?' would really
help here.

-michael
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