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SubjectRe: [PATCH V4 2/6] iommu/arm-smmu: Add pm_runtime/sleep ops
On 07/12, Stephen Boyd wrote:
> On 07/06, Vivek Gautam wrote:
> > From: Sricharan R <sricharan@codeaurora.org>
> >
> > The smmu needs to be functional only when the respective
> > master's using it are active. The device_link feature
> > helps to track such functional dependencies, so that the
> > iommu gets powered when the master device enables itself
> > using pm_runtime. So by adapting the smmu driver for
> > runtime pm, above said dependency can be addressed.
> >
> > This patch adds the pm runtime/sleep callbacks to the
> > driver and also the functions to parse the smmu clocks
> > from DT and enable them in resume/suspend.
> >
> > Signed-off-by: Sricharan R <sricharan@codeaurora.org>
> > Signed-off-by: Archit Taneja <architt@codeaurora.org>
> > [vivek: Clock rework to loop over clock names data]
> > Signed-off-by: Vivek Gautam <vivek.gautam@codeaurora.org>
> > ---
>
> General comment, we have a bulk clk API now, but I guess we
> failed to add the clk_bulk_prepare_enable() API that could be
> used here. Perhaps you can add that API and then use it here to
> reduce lines of code.
>

Bjorn just sent a patch for that API an hour ago.

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a Linux Foundation Collaborative Project

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