Re: [PATCH 00/16] dts/dt-bindings: Fix Arm Ltd. ARMv8 "boards"

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On 2020-05-05 5:51 pm, Andre Przywara wrote:
Date: Mon, 4 May 2020 12:43:18 +0100
Subject: [PATCH 03/16] dt-bindings: ehci/ohci: Allow iommus property

A OHCI/EHCI controller could be behind an IOMMU, in which case an iommus
property assigns the stream ID for this device.

Hmm, pretty much any DMA master device could be behind an IOMMU, and in a way that's basically entirely irrelevant to the device itself (and thus the consumer of its binding). Is there a better way we can handle this than repeating such "semi-standard" properties in individual bindings for ever more?

Robin.

Allow that property in the DT bindings to fix a complaint about the Arm Juno
board's DTS file.

Signed-off-by: Andre Przywara <andre.przywara@xxxxxxx>
---
  Documentation/devicetree/bindings/usb/generic-ehci.yaml | 3 +++
  Documentation/devicetree/bindings/usb/generic-ohci.yaml | 3 +++
  2 files changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/usb/generic-ehci.yaml b/Documentation/devicetree/bindings/usb/generic-ehci.yaml
index 10edd05872ea..20664c28bfb2 100644
--- a/Documentation/devicetree/bindings/usb/generic-ehci.yaml
+++ b/Documentation/devicetree/bindings/usb/generic-ehci.yaml
@@ -74,6 +74,9 @@ properties:
    phy-names:
      const: usb
+ iommus:
+    maxItems: 1
+
  required:
    - compatible
    - reg
diff --git a/Documentation/devicetree/bindings/usb/generic-ohci.yaml b/Documentation/devicetree/bindings/usb/generic-ohci.yaml
index bcffec1f1341..ff6c04cde695 100644
--- a/Documentation/devicetree/bindings/usb/generic-ohci.yaml
+++ b/Documentation/devicetree/bindings/usb/generic-ohci.yaml
@@ -73,6 +73,9 @@ properties:
    phy-names:
      const: usb
+ iommus:
+    maxItems: 1
+
  required:
    - compatible
    - reg




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