Subject: [PATCH 1/6] dt-bindings: usb: dwc3: add property to disable xhci 64bit support

From: Li Jun <[email-masked]>
Date: Tue, 9 Jun 2020 19:12:40 +0800

Add a property "snps,xhci-dis-64bit-support-quirk" to disable xhci 64bit
address support, this is due to SoC integration can't support it but
the AC64 bit (bit 0) of HCCPARAMS1 is set to be 1.

Signed-off-by: Li Jun <[email-masked]>
---
 Documentation/devicetree/bindings/usb/dwc3.txt | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/usb/dwc3.txt b/Documentation/devicetree/bindings/usb/dwc3.txt
index d03edf9..d16cba7 100644
--- a/Documentation/devicetree/bindings/usb/dwc3.txt
+++ b/Documentation/devicetree/bindings/usb/dwc3.txt
@@ -109,6 +109,9 @@ Optional properties:
 			When just one value, which means INCRX burst mode enabled. When
 			more than one value, which means undefined length INCR burst type
 			enabled. The values can be 1, 4, 8, 16, 32, 64, 128 and 256.
+ - snps,xhci-dis-64bit-support-quirk: set if the AC64 bit (bit 0) of HCCPARAMS1 is set
+			to be 1, but the controller actually can't handle 64-bit address
+			due to SoC integration.
 
  - in addition all properties from usb-xhci.txt from the current directory are
    supported as well
-- 
2.7.4

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