AT91 slow clock mode regression/fixes, improvement proposal

[Sylvain Rochet]

Hello Wenyou,

On Mon, Dec 22, 2014 at 08:32:15AM +0000, Yang, Wenyou wrote:
> > On Fri, Dec 19, 2014 at 02:50:04AM +0000, Yang, Wenyou wrote:
> > 
> > > > Furthermore, it looks like MCKRDY_TIMEOUT set to 1000 is not enough,
> > > > my board crashes in about 1 wake up to 10 with this value and works
> > > > perfectly fine with 4000.
> > >
> > > I also encountered this issue.
> > 
> > Fixed in proposed patch, since we don't timeout anymore.
> 
> I am verifying this patch. I still insist on remain the timeout.

Master Clock Ready is a special case, you need a timeout value which is 
fine at slow clock and master clock, that is, a timeout value which is 
fine despite the 10^4 difference in order of magnitude. I just don't 
know what to do, a fine timeout value for master clock is an almost 
infinite timeout on slow clock.

By the way, my board suspended and resumed every 2 seconds this 
week-end, which is about 110k suspend+wake up cycles and didn't reset on 
watchdog, which is quite a good news :-)

Regards,
Sylvain