On Thu, Jul 28, 2022 at 12:55 PM Rob Herring <robh@xxxxxxxxxx> wrote: > > The pl330 can be behind an IOMMU which is the case for Arm Juno board. > Add the 'iommus' property allowing for 1 IOMMU per channel. > > Signed-off-by: Rob Herring <robh@xxxxxxxxxx> > --- > Documentation/devicetree/bindings/dma/arm,pl330.yaml | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/Documentation/devicetree/bindings/dma/arm,pl330.yaml b/Documentation/devicetree/bindings/dma/arm,pl330.yaml > index 2bec69b308f8..b9c4bee178ae 100644 > --- a/Documentation/devicetree/bindings/dma/arm,pl330.yaml > +++ b/Documentation/devicetree/bindings/dma/arm,pl330.yaml > @@ -55,6 +55,11 @@ properties: > > dma-coherent: true > > + iommus: > + minItems: 1 > + maxItems: 8 Off by 1. Juno has 9 entries. I think it's 8 entries for write the read side has 1 entry. The TRM isn't too clear. Rob > + description: Up to 1 IOMMU per DMA channel > + > power-domains: > maxItems: 1 > > -- > 2.34.1 >
