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dt-bindings: Document the qcom,power-always-on property for SMMU devices

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Document the qcom,power-always-on property for SMMU devices. This
property specifies that the votes for power resources for an SMMU
should always be maintained.

Change-Id: I854e07b65d93ed78f9d3e270149d28ef6b599039
This commit is contained in:
Isaac J. Manjarres 2020-11-05 15:01:53 -08:00
commit 478799800f
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7
bindings/iommu/arm,smmu.txt
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@ -182,6 +182,13 @@ conditions.
that interconnect votes will be maintained irrespective of
the CPUSS' state (awake or asleep).
- qcom,power-always-on:
Boolean property which indicates that votes for power
resources (i.e. regulators, clocks, buses) should
always be maintained. This is required when the latency
for the SMMU's operation is greatly increased by adding and
removing votes for power resources.
** Deprecated properties:
- mmu-masters (deprecated in favour of the generic "iommus" binding) :