On Thursday 20 December 2012 04:44 PM, Peter De Schrijver wrote:

quoted

quoted

So why does OMAP4 have working coupled idle without the SGI check then?

Because whenever the OMAP4 CPUs enter into any power states apart from
ON, clock-domain force wakeup method us being used to wakeup
secondary CPUs. And secondly CPU RET is not supported on purpose because
of some known IP block issues.

Aha. That explains indeed why you don't need the check.

Just for the information on OMAP5 SOC, CPU RET is supported and the
couple idle works on it without IPI. As I mentioned, we do use
clock-domain force wakeup method for wakeup. Code is out of the
tree hence i didn't mention that in first place.

Regards
Santosh