Re: [PATCH v9 5/5] iommu/arm-smmu: Add support for qcom,smmu-v2 variant

[Tomasz Figa]

Hi Yisheng,

Sorry, I think we missed your question here.

On Wed, Mar 28, 2018 at 3:12 PM Yisheng Xie <xieyisheng1@xxxxxxxxxx> wrote:

> Hi Vivek,

> On 2018/3/28 12:37, Vivek Gautam wrote:
> > Hi Yisheng
> >
> >
> > On 3/28/2018 6:54 AM, Yisheng Xie wrote:
> >> Hi Vivek,
> >>
> >> On 2018/3/13 16:55, Vivek Gautam wrote:
> >>> +- power-domains:  Specifiers for power domains required to be
powered on for
> >>> +                  the SMMU to operate, as per generic power domain
bindings.
> >>> +
> >> In this patchset, power-domains is not used right? And you just do the
clock gating,
> >> but not power gating, right?
> >
> > We are handling the power-domains too. Please see the example in this
binding doc.

> I see, but I do not find the point in code of these patchset, do you mean
PMIC(e.g mmcc)
> will gate the power domain of SMMU(e.g. MDSS_GDSC of mmcc) when PMIC
suspend?


If respective SoC power domains is registered as a standard genpd PM
domain, then the runtime PM subsystem will take care of power domain
control at runtime suspend and resume.

Best regards,
Tomasz