[U-Boot] Watchdog support.

[Luigi 'Comio' Mantellini]

Hi ML,

I'm working  on a mips based SoC with an external watchdog. The watchdog 
should be touched every 5 seconds in order to avoid the system reboot.

I tried to define macros like CONFIG_HW_WATCHDOG / CONFIG_WATCHDOG, but I'm not 
happy for the result. For example, the serial port driver (ns16550 in my case) 
don't touch the watchdog during the status polling, as well as a lot of 
commands (copy in flash, tftp, ...).

I don't understand if u-boot supports or not watchdogs in a "structural" 
manner.

Kindly, if you have experience on Watchdog under u-boot, tell my any comments 
or suggestion.... in my application the watchdog is mandatory (i cannot stop 
the _watchdog_).

Thanks again and best regards,

luigi

-- 
Luigi Mantellini
R&D - Software
Industrie Dial Face S.p.A.
Via Canzo, 4
20068 Peschiera Borromeo (MI), Italy
Tel.:  +39 02 5167 2813
Fax:   +39 02 5167 2459
Email: luigi.mantellini at idf-hit.com