linux-kernel - [PATCH] dt-bindings: usb: dwc3-xilinx: Describe the reset constraint for the versal platform

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Message-ID: <20251112155430.1326426-1-radhey.shyam.pandey@amd.com>
Date: Wed, 12 Nov 2025 21:24:30 +0530
From: Radhey Shyam Pandey <radhey.shyam.pandey@....com>
To: <gregkh@...uxfoundation.org>, <robh@...nel.org>, <krzk+dt@...nel.org>,
	<conor+dt@...nel.org>, <michal.simek@....com>
CC: <linux-usb@...r.kernel.org>, <devicetree@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
	<git@....com>, Radhey Shyam Pandey <radhey.shyam.pandey@....com>
Subject: [PATCH] dt-bindings: usb: dwc3-xilinx: Describe the reset constraint for the versal platform

AMD Versal platform USB 2.0 IP controller receives one reset input from
the SoC controlled by the CRL.RST_USB [RESET] register so accordingly
describe reset constraints.

Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@....com>
---
 .../devicetree/bindings/usb/dwc3-xilinx.yaml  | 43 +++++++++++++++----
 1 file changed, 34 insertions(+), 9 deletions(-)

diff --git a/Documentation/devicetree/bindings/usb/dwc3-xilinx.yaml b/Documentation/devicetree/bindings/usb/dwc3-xilinx.yaml
index 36f5c644d959..cd0cc9da242f 100644
--- a/Documentation/devicetree/bindings/usb/dwc3-xilinx.yaml
+++ b/Documentation/devicetree/bindings/usb/dwc3-xilinx.yaml
@@ -50,17 +50,22 @@ properties:
     description:
       A list of phandles for resets listed in reset-names.
 
-    items:
-      - description: USB core reset
-      - description: USB hibernation reset
-      - description: USB APB reset
+    oneOf:
+      - items:
+          - description: USB controller reset
+      - items:
+          - description: USB core reset
+          - description: USB hibernation reset
+          - description: USB APB reset
 
   reset-names:
-    items:
-      - const: usb_crst
-      - const: usb_hibrst
-      - const: usb_apbrst
-
+    oneOf:
+      - items:
+          - const: usb_crst
+      - items:
+          - const: usb_crst
+          - const: usb_hibrst
+          - const: usb_apbrst
   phys:
     minItems: 1
     maxItems: 2
@@ -95,6 +100,26 @@ required:
   - resets
   - reset-names
 
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - xlnx,versal-dwc3
+    then:
+      properties:
+        resets:
+          maxItems: 1
+        reset-names:
+          maxItems: 1
+    else:
+      properties:
+        resets:
+          minItems: 3
+        reset-names:
+          minItems: 3
+
 additionalProperties: false
 
 examples:

base-commit: b179ce312bafcb8c68dc718e015aee79b7939ff0
-- 
2.34.1