linux-kernel - [PATCH] dt-bindings: usb: ehci/ohci: Allow "dma-coherent"

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Message-ID: <20251215212515.3318052-1-robh@kernel.org>
Date: Mon, 15 Dec 2025 15:25:14 -0600
From: "Rob Herring (Arm)" <robh@...nel.org>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>
Cc: linux-usb@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] dt-bindings: usb: ehci/ohci: Allow "dma-coherent"

EHCI and OHCI controllers can be DMA coherent on some platforms, so
allow the "dma-coherent" property.

Signed-off-by: Rob Herring (Arm) <robh@...nel.org>
---
 Documentation/devicetree/bindings/usb/generic-ehci.yaml | 2 ++
 Documentation/devicetree/bindings/usb/generic-ohci.yaml | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/usb/generic-ehci.yaml b/Documentation/devicetree/bindings/usb/generic-ehci.yaml
index 4e84bead0232..601f097c09a6 100644
--- a/Documentation/devicetree/bindings/usb/generic-ehci.yaml
+++ b/Documentation/devicetree/bindings/usb/generic-ehci.yaml
@@ -93,6 +93,8 @@ properties:
     minItems: 1
     maxItems: 2
 
+  dma-coherent: true
+
   interrupts:
     maxItems: 1
 
diff --git a/Documentation/devicetree/bindings/usb/generic-ohci.yaml b/Documentation/devicetree/bindings/usb/generic-ohci.yaml
index 3ee1586fc8b9..961cbf85eeb5 100644
--- a/Documentation/devicetree/bindings/usb/generic-ohci.yaml
+++ b/Documentation/devicetree/bindings/usb/generic-ohci.yaml
@@ -64,6 +64,8 @@ properties:
   reg:
     maxItems: 1
 
+  dma-coherent: true
+
   interrupts:
     maxItems: 1
 
-- 
2.51.0