Re: [PATCH v4 2/4] dt-bindings: interrupt-controller: msi: Add msi-ranges property
flat view
From: Rob Herring <robh@kernel.org>
Date: 2021-08-31 21:16:08
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linux-devicetree, linux-pci, lkml
On Fri, Aug 27, 2021 at 07:15:27PM +0200, Mark Kettenis wrote:
quoted hunk ↗ jump to hunk
From: Mark Kettenis <redacted> 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 <redacted> --- .../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.
+ 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
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