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

[Rajendra Nayak]

On Tuesday 06 March 2012 02:01 PM, Tero Kristo wrote:
> On Mon, 2012-03-05 at 16:33 -0800, Kevin Hilman wrote:
>> Tero Kristo<t-kristo at ti.com>  writes:
>>
>>> From: Rajendra Nayak<rnayak at 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 at ti.com>
>>> Signed-off-by: Tero Kristo<t-kristo at ti.com>
>>> Reviewed-by: Santosh Shilimkar<santosh.shilimkar at 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

Why?, doesn't debug console wakeup work?

> change the behavior to worse even without any additional patches. :) But
> yea, good to wait until IO chain is in.

IO chain, according to documentation :) should be needed only if you
hit OSWR or OFF, async wakeups should be functional as long as you
only hit CSWR.

>
> 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)
>
>