[PATCHv3 4/6] ARM: OMAP3 PM: Enable IO Wake up

[Tero Kristo]

On Thu, 2012-03-01 at 12:22 +0530, Rajendra Nayak wrote:
> On Wednesday 29 February 2012 07:56 PM, Tero Kristo wrote:
> > From: Vishwanath BS<vishwanath.bs at ti.com>
> >
> > Enable IO Wake up for OMAP3 as part of PM Init. Currently this has been
> > managed in cpuidle path which is not the right place. Subsequent patch
> > will remove IO Daisy chain handling in cpuidle path once daisy chain is
> > handled as part of hwmod mux.
> >
> > Signed-off-by: Vishwanath BS<vishwanath.bs at ti.com>
> > Tested-by: Govindraj.R<govindraj.raja at ti.com>
> > Signed-off-by: Tero Kristo<t-kristo at ti.com>
> > ---
> >   arch/arm/mach-omap2/pm34xx.c |    4 ++++
> >   1 files changed, 4 insertions(+), 0 deletions(-)
> >
> > diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c
> > index e97ec3f..e6c2d39 100644
> > --- a/arch/arm/mach-omap2/pm34xx.c
> > +++ b/arch/arm/mach-omap2/pm34xx.c
> > @@ -793,6 +793,10 @@ static int __init omap3_pm_init(void)
> >   		goto err1;
> >   	}
> >
> > +	if (omap3_has_io_wakeup())
> > +		omap2_prm_set_mod_reg_bits(OMAP3430_EN_IO_MASK, WKUP_MOD,
> > +					   PM_WKEN);
> 
> On OMAP4 this GLOBAL IO chain enable happens as part of the trigger
> function itself, it might make sense to do that for OMAP3 too to avoid
> similar issues as seen on OMAP4 when the GLOBAL switch is enabled too
> late in boot. The best however would be to get rid of it in the trigger
> function and enable this early during PM init, but I am not sure whats
> a good place to do this 'early' enough.

Sounds good. This will take care of the comment from Paul also.

-Tero

> 
> regards,
> Rajendra
> 
> > +
> >   	ret = pwrdm_for_each(pwrdms_setup, NULL);
> >   	if (ret) {
> >   		printk(KERN_ERR "Failed to setup powerdomains\n");
>