[PATCH v2 3/5] dt-bindings: usb: xhci: Add 'write-64-hi-lo-quirk' quirk

Daehwan Jung
2024-05-31T06:07:32Z

xHCI specification 5.1 "Register Conventions" states that 64 bit
registers should be written in low-high order. All writing operations
in xhci is done low-high order following the spec.

Add a new quirk to support workaround for high-low order.

Signed-off-by: Daehwan Jung <dh10.jung@samsung.com>
---
Documentation/devicetree/bindings/usb/usb-xhci.yaml | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/usb/usb-xhci.yaml b/Documentation/devicetree/bindings/usb/usb-xhci.yaml
index 4238ae8..447d331 100644
--- a/Documentation/devicetree/bindings/usb/usb-xhci.yaml
+++ b/Documentation/devicetree/bindings/usb/usb-xhci.yaml
@@ -25,6 +25,10 @@ properties:
description: Set if the controller has broken port disable mechanism
type: boolean

+ write-64-hi-lo-quirk:
+ description: Set if the controller has a limitation of high-low order
+ type: boolean
+
imod-interval-ns:
description: Interrupt moderation interval
default: 5000
--
2.7.4