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-rw-r--r--Documentation/devicetree/bindings/usb/dwc3.txt10
1 files changed, 9 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/usb/dwc3.txt b/Documentation/devicetree/bindings/usb/dwc3.txt
index d2d5a8e99db5..45043c4c54ae 100644
--- a/Documentation/devicetree/bindings/usb/dwc3.txt
+++ b/Documentation/devicetree/bindings/usb/dwc3.txt
@@ -4,7 +4,15 @@ DWC3- USB3 CONTROLLER. Complies to the generic USB binding properties
as described in 'usb/generic.txt'
Required properties:
- - compatible: must be "snps,dwc3"
+ - compatible: must be "snps,dwc3" and (if applicable) may contain a
+ chip-specific compatible string in front of it to allow dwc3 driver be
+ able to update cache type configuration accordingly, otherwise
+ Layerscape SoC will encounter USB init failure when adding property
+ dma-coherent on device tree.
+ Example:
+ * "fsl,layerscape-dwc3", "snps,dwc3"
+ * "snps,dwc3"
+
- reg : Address and length of the register set for the device
- interrupts: Interrupts used by the dwc3 controller.
- clock-names: should contain "ref", "bus_early", "suspend"