Hello!
Your commit d2e64d29c44dee6d455f7705dd1cf1af8674ad9a ("cli_readline: Only insert printable chars") broke support for pound sign (£) and euro sign (€) keys on Nokia N900 keypad.
When I press either of those two keys, nothing is displayed on the N900 screen.
On the other hand key for dollar sign ($) is working fine.
After reverting that commit those two keys are working again. So I can type "echo 40 €" and U-Boot console will print "40 €" on the screen.
Commit message of that commit says to insert only printable characters but instead it started dropping some printable characters.
It would be a wise idea to not censor usage of non-dollar currency symbols in U-Boot :-) Hehe I know that issue is probably with non-7-bit characters, but funny things is that on N900 keypad are only two non-ASCII characters: £ and €.
Could you please look at it, what can be done with it?