> Date: Tue, 31 Aug 2021 16:16:02 -0500 > From: Rob Herring <robh@xxxxxxxxxx> > > On Fri, Aug 27, 2021 at 07:15:27PM +0200, Mark Kettenis wrote: > > From: Mark Kettenis <kettenis@xxxxxxxxxxx> > > > > Update the MSI controller binding to add an msi-ranges property > > that specifies how MSIs map onto regular interrupts on some other > > interrupt controller. > > > > Signed-off-by: Mark Kettenis <kettenis@xxxxxxxxxxx> > > --- > > .../bindings/interrupt-controller/msi-controller.yaml | 8 ++++++++ > > 1 file changed, 8 insertions(+) > > > > diff --git a/Documentation/devicetree/bindings/interrupt-controller/msi-controller.yaml b/Documentation/devicetree/bindings/interrupt-controller/msi-controller.yaml > > index 5ed6cd46e2e0..bf8b8a7dba09 100644 > > --- a/Documentation/devicetree/bindings/interrupt-controller/msi-controller.yaml > > +++ b/Documentation/devicetree/bindings/interrupt-controller/msi-controller.yaml > > @@ -31,4 +31,12 @@ properties: > > Identifies the node as an MSI controller. > > $ref: /schemas/types.yaml#/definitions/flag > > > > + msi-ranges: > > + description: > > + A list of pairs <intid span>, where "intid" is the specification > > It's not really 'pairs' and 'interrupt specifier' is the terminology the > spec uses. How about: > > A list of <phandle intspec span>, where "phandle" is parent interrupt > controller, "intspec" is the starting/base interrupt specifier, and > "span" is the size of that range (typically multiples of 32). > > The 'multiples of 32' part is what Marc told me. Thanks Rob! That sounds good. But 32 is what's typical for the Apple hardware, and I expect that different hardware that might use this property will use a different value, so I left that last bit out. I also kept the bit that states that multiple ranges are allowed. > > + of the first interrupt (including the phandle for the interrupt > > + controller) that can be used as an MSI, and "span" the size of > > + that range. Multiple ranges can be provided. > > + $ref: /schemas/types.yaml#/definitions/phandle-array > > + > > additionalProperties: true > > -- > > 2.32.0 > > > > >
