Update the Cadence USBSS DRD binding to document that it also covers
the USBSSP (SuperSpeed Plus, USB 3.1 gen2x1) controller. Both USBSS
and USBSSP share the same DRD/OTG register interface, so the driver
auto-detects the controller version at runtime — no additional
compatible string is needed.
Changes to the binding:
- Update title and add description
- maximum-speed: add super-speed-plus
This patch is Assisted-by: Cursor:claude-4.6-opus
Signed-off-by: Peter Chen <peter.chen@cixtech.com>
---
Documentation/devicetree/bindings/usb/cdns,usb3.yaml | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/usb/cdns,usb3.yaml b/Documentation/devicetree/bindings/usb/cdns,usb3.yaml
index f454ddd9bbaa..ad5acf956edf 100644
--- a/Documentation/devicetree/bindings/usb/cdns,usb3.yaml
+++ b/Documentation/devicetree/bindings/usb/cdns,usb3.yaml
@@ -4,11 +4,17 @@
$id: http://devicetree.org/schemas/usb/cdns,usb3.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
-title: Cadence USBSS-DRD controller
+title: Cadence USBSS and USBSSP DRD controller
maintainers:
- Pawel Laszczak <pawell@cadence.com>
+description:
+ Cadence USB dual-role controller. Covers USBSS (SuperSpeed, USB 3.0) and
+ USBSSP (SuperSpeed Plus, USB 3.1 gen2x1). Both variants share the same
+ DRD/OTG register interface, so the driver auto-detects the controller
+ version at runtime.
+
properties:
compatible:
const: cdns,usb3
@@ -49,7 +55,7 @@ properties:
cdns3 to type C connector.
maximum-speed:
- enum: [super-speed, high-speed, full-speed]
+ enum: [super-speed-plus, super-speed, high-speed, full-speed]
phys:
minItems: 1
--
2.50.1