linux-kernel - [PATCH v2 1/2] dt-bindings: usb: aspeed,usb-vhub: Add ast2700 support

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Message-ID: <20251128-upstream_vhub-v2-1-1fa66a5833c2@aspeedtech.com>
Date: Fri, 28 Nov 2025 08:27:30 +0800
From: Ryan Chen <ryan_chen@...eedtech.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Rob Herring
	<robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
	<conor+dt@...nel.org>, Joel Stanley <joel@....id.au>, Andrew Jeffery
	<andrew@...econstruct.com.au>, Benjamin Herrenschmidt
	<benh@...nel.crashing.org>, Philipp Zabel <p.zabel@...gutronix.de>
CC: <linux-usb@...r.kernel.org>, <devicetree@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-aspeed@...ts.ozlabs.org>,
	<linux-kernel@...r.kernel.org>, Ryan Chen <ryan_chen@...eedtech.com>
Subject: [PATCH v2 1/2] dt-bindings: usb: aspeed,usb-vhub: Add ast2700
 support

Add the "aspeed,ast2700-usb-vhub" compatible. The ast2700 vhub
controller requires an reset, so make the "resets" property
mandatory for this compatible to reflect the hardware requirement.

Signed-off-by: Ryan Chen <ryan_chen@...eedtech.com>
---
 .../devicetree/bindings/usb/aspeed,usb-vhub.yaml   | 22 ++++++++++++++++++++--
 1 file changed, 20 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/usb/aspeed,usb-vhub.yaml b/Documentation/devicetree/bindings/usb/aspeed,usb-vhub.yaml
index 7f22f9c031b2..b8bac2cce949 100644
--- a/Documentation/devicetree/bindings/usb/aspeed,usb-vhub.yaml
+++ b/Documentation/devicetree/bindings/usb/aspeed,usb-vhub.yaml
@@ -17,8 +17,8 @@ description: |+
 
   Supported number of devices and endpoints vary depending on hardware
   revisions. AST2400 and AST2500 Virtual Hub supports 5 downstream devices
-  and 15 generic endpoints, while AST2600 Virtual Hub supports 7 downstream
-  devices and 21 generic endpoints.
+  and 15 generic endpoints, while AST2600 and AST2700 Virtual Hub supports
+  7 downstream devices and 21 generic endpoints.
 
 properties:
   compatible:
@@ -26,6 +26,7 @@ properties:
       - aspeed,ast2400-usb-vhub
       - aspeed,ast2500-usb-vhub
       - aspeed,ast2600-usb-vhub
+      - aspeed,ast2700-usb-vhub
 
   reg:
     maxItems: 1
@@ -33,6 +34,9 @@ properties:
   clocks:
     maxItems: 1
 
+  resets:
+    maxItems: 1
+
   interrupts:
     maxItems: 1
 
@@ -107,6 +111,20 @@ required:
   - aspeed,vhub-downstream-ports
   - aspeed,vhub-generic-endpoints
 
+if:
+  properties:
+    compatible:
+      contains:
+        const: aspeed,ast2700-usb-vhub
+
+then:
+  required:
+    - resets
+
+else:
+  properties:
+    resets: false
+
 additionalProperties: false
 
 examples:

-- 
2.34.1