[U-Boot] u-boot and watchdogs

[Wolfgang Denk]

Dear "Dexdyne Postmaster",

In message <memo.20090811100117.12188C at postmaster+dexdyne.com.cix.co.uk> you wrote:
> Our hardware has a watchdog which has a maximum period of 1 second.
> 
> Once I've got Linux up and going I can handle that.
> 
> I'd love to have a watchdog so that if Linux doesn't take over, the board
> will reset and try again.
> 
> Is there any experience/example of u-boot driving a short-period watchdog
> throughout the boot process I can try to copy?

Yes, that's a standard feature used by many boards. Worst case is a
80 millisecond timeout with a tolerance of +/- 20 millisec.

Best regards,

Wolfgang Denk

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DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
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