Re: AT91SAM9/CAP9 watchdog driver

From: Alan Cox
Date: Wed Jun 04 2008 - 15:34:36 EST


> > - If you specify a bogus value it doesn't load
> > - If you specify no value you get a valid default
> > - If you specify a valid value you get that
> >
> > I don't believe yours should be different.
>
> I don't think any other in-kernel watchdog driver has to deal with
> write-once hardware. On these processors once the watchdog register

That would not be the case.

> is programmed, it cannot be disabled or re-programmed.
> If the above behaviour is required, then we might aswell remove the
> ioctl(WDIOC_SETTIMEOUT) interface for this driver since if the user
> wants anything other than the default timeout they would need to pass
> it via the kernel command-line or module parameters.

Actually quit a few of them deal with various hardware limits by using a
software timer to maintain the hardware timer poking.

Alan
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