From 5e5c636c69bdba04033161bbb111fbb6f1f6661e Mon Sep 17 00:00:00 2001 From: Lorenzo Pieralisi Date: Fri, 6 Oct 2023 14:59:25 +0200 Subject: dt-bindings: interrupt-controller: arm,gic-v3: Add dma-noncoherent property The GIC v3 specifications allow redistributors and ITSes interconnect ports used to access memory to be wired up in a way that makes the respective initiators/memory observers non-coherent. Add the standard dma-noncoherent property to the GICv3 bindings to allow firmware to describe the redistributors/ITSes components and interconnect ports behaviour in system designs where the redistributors and ITSes are not coherent with the CPU. Reviewed-by: Rob Herring Signed-off-by: Lorenzo Pieralisi Cc: Rob Herring Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20231006125929.48591-2-lpieralisi@kernel.org --- .../devicetree/bindings/interrupt-controller/arm,gic-v3.yaml | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.yaml b/Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.yaml index 2bc38479a41e..0f4a062c9d6f 100644 --- a/Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.yaml +++ b/Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.yaml @@ -106,6 +106,12 @@ properties: $ref: /schemas/types.yaml#/definitions/uint32 maximum: 4096 + dma-noncoherent: + description: + Present if the GIC redistributors permit programming shareability + and cacheability attributes but are connected to a non-coherent + downstream interconnect. + msi-controller: description: Only present if the Message Based Interrupt functionality is @@ -193,6 +199,12 @@ patternProperties: compatible: const: arm,gic-v3-its + dma-noncoherent: + description: + Present if the GIC ITS permits programming shareability and + cacheability attributes but is connected to a non-coherent + downstream interconnect. + msi-controller: true "#msi-cells": -- cgit