[U-Boot] [PATCH v2] ns16550: Add WATCHDOG_RESET to putc for short watchdog timeout boards

[Reinhard Meyer]

>> Back to the problem: How about moving the watchdog_reset call to serial_puts() 
>> in common/serial.c? Or do you have another (better) idea in mind?
> 
> Are you really sure this is the right place, i. e. this is where the
> problem happens?
> 
> I doubt that.
> 
> lwmon5 which has this nasty 100 ms watchdog (actually 80 ms including
> allowable tolerances, IIRC) is running at 115bps.
> 
> In theory, it would take a string of more than 900 characters for
> puts() to exceeding this delay, but all strings ever printed in U-Boot
> are way shorter.

Just my 2 cents: I don't know if that system has hardware handshake, and if that's
enable. But a missing CTS could stop output indefinitely. Or a receiving terminal
program might use CTS to halt output when its somewhat busy.

Just a thought for a possible scenario...

Best Regards,
Reinhard