diff mbox series

[v8,3/3] dt-bindings: PCI: microchip,pcie-host: allow dma-noncoherent

Message ID 20240821130217.957424-4-daire.mcnamara@microchip.com (mailing list archive)
State Superseded
Headers show
Series Fix address translations on MPFS PCIe controller | expand

Commit Message

Daire McNamara Aug. 21, 2024, 1:02 p.m. UTC 
From: Conor Dooley <conor.dooley@microchip.com>

PolarFire SoC may be configured in a way that requires non-coherent DMA
handling. On RISC-V, buses are coherent by default & the dma-noncoherent
property is required to denote buses or devices that are non-coherent.

Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Daire McNamara <daire.mcnamara@microchip.com>
Acked-by: Rob Herring <robh@kernel.org>
---
 Documentation/devicetree/bindings/pci/microchip,pcie-host.yaml | 2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/pci/microchip,pcie-host.yaml b/Documentation/devicetree/bindings/pci/microchip,pcie-host.yaml
index 612633ba59e2..5f5f2b25d797 100644
--- a/Documentation/devicetree/bindings/pci/microchip,pcie-host.yaml
+++ b/Documentation/devicetree/bindings/pci/microchip,pcie-host.yaml
@@ -44,6 +44,8 @@  properties:
     items:
       pattern: '^fic[0-3]$'
 
+  dma-coherent: true
+
   ranges:
     minItems: 1
     maxItems: 3