Re: APE6EVM and Runtime PM

[Simon Horman <horms@verge.net.au>]

On Thu, Apr 04, 2013 at 03:14:33PM +0900, Simon Horman wrote:
> On Thu, Apr 04, 2013 at 02:28:38PM +0900, Kuninori Morimoto wrote:
> > 
> > Dear Simon
> > 
> > > > > in the course of looking look at consolidating our defconfigs I
> > > > > noticed that SMSC ethernet and rcar_thermal seem seem to not work when
> > > > > runtime PM is enabled.
> > > > > 
> > > > > I'm wondering if you have any ideas of what might be the cause of this
> > > > > or if you could give me some guidance on investigating this problem.
> > > > > 
> > > > > I assume that it relates to a clock or clocks not being enabled.
> > > > 
> > > > About rcar_thermal, it needs my patch which was sent to PM ML.
> > > > I got email from Zhang that he accepted my patch (pm_runtime support for thermal).
> > > > But it seems he didn't push his branch yet...
> > > > I guess I explained this on my [PATCH 0/x] email.
> > > 
> > > Thanks, sorry for missing that.
> > > 
> > > I guess we are down to just SMSC then.
> > 
> > I didn't check real board,
> > but I guess current SMSC IRQ came from IRQC,
> > and this IRQC needs MSTP 407.
> > But IRQC driver seems doesn't support PM_RUNTIME at this point.
> > 
> > Does your issue solve by adding MSTP 407 with CLK_ENABLE_ON_INIT ?
> > I'm not sure this is good solution, but quick-hack
> 
> Thanks!
> 
> I will post a patch to add pm_runtime support to the IRQC Driver.
> It seems to allow SMSC + RUNTIME_PM to function on the APE6EVM.

For reference, I have posted "irqchip: irqc: Add runtime PM support"