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dt-bindings: usb: cdns,usb3: document USBSSP controller support

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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>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20260316064831.274865-2-peter.chen@cixtech.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Chen 2026-03-16 14:48:30 +08:00 committed by Greg Kroah-Hartman
parent 6b9db53197
commit fb14e7f7cb
1 changed files with 8 additions and 2 deletions
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10
Documentation/devicetree/bindings/usb/cdns,usb3.yaml
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@ -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