[U-Boot] Watchdog support.

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