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SubjectRe: [PATCH V4 2/6] iommu/arm-smmu: Add pm_runtime/sleep ops

On 07/13/2017 04:31 AM, Stephen Boyd wrote:
> On 07/12, Stephen Boyd wrote:
>> On 07/06, Vivek Gautam wrote:
>>> From: Sricharan R <>
>>> 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 <>
>>> Signed-off-by: Archit Taneja <>
>>> [vivek: Clock rework to loop over clock names data]
>>> Signed-off-by: Vivek Gautam <>
>>> ---
>> 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.

Sure, will use the bulk clock APIs to handle the clocks.

Best regards

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

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