Re: how to allow board writers to customize driver behavior (watchdog here)

[Paul Mundt]

On Thu, May 24, 2007 at 12:21:47AM -0400, Mike Frysinger wrote:
> is this completely bad mojo ?  is there some other mechanism that
> provides what i want and i just dont know about it ?  or do i just
> make people change the driver to fit their application, thus throwing
> out the idea of keeping all board-specific details in just the boards
> file ...

It sounds like your constraining your driver based on terminology.
Watchdogs on most embedded platforms support either a 'reset' mode or
otherwise act as periodic timers, trying to push both of these
functionalities in to a watchdog driver is rather pointless.
CONFIG_WATCHDOG implies 'reset' mode by definition.

If you wish to use your watchdog timer as a periodic timer, simply have a
clocksource/clockevents established for it, leave the watchdog driver as
a reset-only thing, and let the user decide which one they want either
via Kconfig or the kernel command line. (The watchdog driver can just
-ENODEV or -EBUSY if the clocksource is active).
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