[PATCHv3 1/4] ARM: OMAP4: suspend: Program all domains to retention

[t-kristo@ti.com (Tero Kristo)]

On Mon, 2012-03-05 at 16:33 -0800, Kevin Hilman wrote:
> Tero Kristo <t-kristo@ti.com> writes:
> 
> > From: Rajendra Nayak <rnayak@ti.com>
> >
> > Remove the FIXME's in the suspend sequence since
> > we now intend to support system level RET support.
> >
> > Signed-off-by: Rajendra Nayak <rnayak@ti.com>
> > Signed-off-by: Tero Kristo <t-kristo@ti.com>
> > Reviewed-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
> 
> So this is the only patch in this series that is still needed.  However...
> 
> It doesn't seem like this all by itself is ready for mainline as we'll
> suddenly start putting all powerdomains in retention without any
> additional support.
>
> I guess at a minimum it needs working IO wakeup support from the IO
> daisy chain series.  Are there other dependencies here?

Only IO chain is needed for wakeup capability. Actually even with the
current mainline kernel, I am unable to wake-up the device from MPU
retention, as there are no wakeup sources. So this patch doesn't really
change the behavior to worse even without any additional patches. :) But
yea, good to wait until IO chain is in.

The other dependencies are that the stuff handled by patches 2,3 and 4
have to be handled somehow:

-patch2: must be in (this patch is queued by Paul)
-patch3: will be taken care of by Paul's pwrdm fixes (I guess this is
queued by Paul himself already)
-patch4: OMAP interrupt count must be increased (this is handled by
Benoit's patch, which is queued by Tony)

-Tero

> 
> If not, I can queue this when Paul is ready to merge the IO wakeup
> stuff.
> 
> Kevin
> 
> > ---
> >  arch/arm/mach-omap2/pm44xx.c |    6 ------
> >  1 files changed, 0 insertions(+), 6 deletions(-)
> >
> > diff --git a/arch/arm/mach-omap2/pm44xx.c b/arch/arm/mach-omap2/pm44xx.c
> > index c264ef7..1ab30a3 100644
> > --- a/arch/arm/mach-omap2/pm44xx.c
> > +++ b/arch/arm/mach-omap2/pm44xx.c
> > @@ -151,12 +151,6 @@ static int __init pwrdms_setup(struct powerdomain *pwrdm, void *unused)
> >  	if (!strncmp(pwrdm->name, "cpu", 3))
> >  		return 0;
> >  
> > -	/*
> > -	 * FIXME: Remove this check when core retention is supported
> > -	 * Only MPUSS power domain is added in the list.
> > -	 */
> > -	if (strcmp(pwrdm->name, "mpu_pwrdm"))
> > -		return 0;
> >  
> >  	pwrst = kmalloc(sizeof(struct power_state), GFP_ATOMIC);
> >  	if (!pwrst)