Re: [RFC 0/5] r8a7790: lager: add support for RCLK watchdog

[Wolfram Sang <wsa@the-dreams.de>]

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On Mon, Feb 02, 2015 at 12:50:24PM +0100, Geert Uytterhoeven wrote:
> Hi Wolfram,
> 
> On Mon, Feb 2, 2015 at 12:24 PM, Wolfram Sang <wsa@the-dreams.de> wrote:
> >> I've just tried your series on Koelsch, and it suffers from the same problem.
> >> Does it work on Lager for both CONFIG_SMP=y and CONFIG_SMP=n?
> >
> > I didn't. And what a surprise, it fails with SMP=y :( I'll having a
> > look...
> 
> Good luck!

Weelllll....

I think there are multiple issues and they mostly come from the fact
that a watchdog reset does not initialize the RST module. Rebooting even
fails when I only use CPU0 with SMP=y. I could fix this very hackish by
resetting the A15 boot address (CA15BAR) to the default value in the
watchdog probe function. That alone sadly doesn't help. Once I activate
the other CPUs, it will still lock up.

Pity, but before I get too side-tracked from what I originally wanted to
do, it seems that I simply have to run my tests with SMP=n. I guess this
also renders the watchdog driver pretty useless for upstream now :(


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