[PATCH v4 0/4] ARM: OMAP2+: AM33XX: VDD CORE OPP50 support

[Russ Dill]

On Thu, Aug 29, 2013 at 11:03 AM, Mark Brown <broonie at kernel.org> wrote:
> On Thu, Aug 29, 2013 at 10:47:04AM -0700, Russ Dill wrote:
>> On Thu, Aug 29, 2013 at 10:30 AM, Mark Brown <broonie at kernel.org> wrote:
>
>> > So this is done from cpuidle rather than system suspend.
>
>> It is done for system suspend. It isn't possible to do this in a
>> cpuidle use case as the memory controller would need to come out of
>> idle automatically to service DMA requests.
>
> OK, so it's all part of the core power down sequence for the SoC?  I'm
> not sure that makes a big difference but it at least means that there
> are fewer runtime interactions to worry about.

 Well, core suspend sequence for the SoC.

>> > I mean describe the intended sequence of events in the system rather
>> > than the raw register commands to accomplish them.
>
>> I'm still not sure what you mean.
>
> Say "set voltage X" or even "regulator X supplies Y" not "send this
> bytestream to the device".

That's already known at the SoC level, "set the vdd core regulator to
0.95V". What isn't known is how to do that for each board.

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