[PATCH 2/4] dt-bindings: usb: dwc2: add iommus

[Krzysztof Kozlowski]

The DWC2 node might use IOMMU (e.g. Altera Stratix10), so add "iommus"
property.  This fixes warnings like:

  arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dt.yaml:
    usb@ffb40000: 'iommus' does not match any of the regexes: 'pinctrl-[0-9]+'

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxxxxx>
---
 Documentation/devicetree/bindings/usb/dwc2.yaml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/usb/dwc2.yaml b/Documentation/devicetree/bindings/usb/dwc2.yaml
index 048e352c531a..1ba96706bbcb 100644
--- a/Documentation/devicetree/bindings/usb/dwc2.yaml
+++ b/Documentation/devicetree/bindings/usb/dwc2.yaml
@@ -68,6 +68,9 @@ properties:
     items:
       - const: otg
 
+  iommus:
+    maxItems: 1
+
   resets:
     items:
       - description: common reset
-- 
2.32.0