From 478799800f64151a6f866e20da712eebbb71fdb6 Mon Sep 17 00:00:00 2001 From: "Isaac J. Manjarres" Date: Thu, 5 Nov 2020 15:01:53 -0800 Subject: [PATCH] dt-bindings: Document the qcom,power-always-on property for SMMU devices 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 --- bindings/iommu/arm,smmu.txt | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/bindings/iommu/arm,smmu.txt b/bindings/iommu/arm,smmu.txt index 9e3e515e4e96..29e79cddee88 100644 --- a/bindings/iommu/arm,smmu.txt +++ b/bindings/iommu/arm,smmu.txt @@ -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) :