Dear "Luigi 'Comio' Mantellini",
In message 200809140859.33792.luigi.mantellini.ml@gmail.com you wrote:
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.
That shgould be no problem. We have a couple of boards that have watchdogs enabled, some with really strict requirements (like triggering the watchdow every 80 milliseconds).
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 can't speak for MIPS in general, but the common infeastructure should work just fine.
I don't understand if u-boot supports or not watchdogs in a "structural" manner.
Yes, it does.
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_).
It's a standard feature being used actively on several boards, some of them in mass production.
Best regards,
Wolfgang Denk