linux-kernel - [PATCH 1/4] dt-bindings: usb: uhci: Add reset property

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Message-ID: <20250915073926.3057368-2-ryan_chen@aspeedtech.com>
Date: Mon, 15 Sep 2025 15:39:23 +0800
From: Ryan Chen <ryan_chen@...eedtech.com>
To: ryan_chen <ryan_chen@...eedtech.com>, Greg Kroah-Hartman
	<gregkh@...uxfoundation.org>, Rob Herring <robh@...nel.org>, "Krzysztof
 Kozlowski" <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, "Alan
 Stern" <stern@...land.harvard.edu>, Philipp Zabel <p.zabel@...gutronix.de>,
	<linux-usb@...r.kernel.org>, <devicetree@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: [PATCH 1/4] dt-bindings: usb: uhci: Add reset property

The UHCI controller on Aspeed SoCs (including AST2700) requires
its reset line to be deasserted before the controller can be used.
Add an optional "resets" property to the UHCI device tree bindings
to describe the phandle to the reset controller.

This property is optional for platforms which do not require
explicit reset handling.

Signed-off-by: Ryan Chen <ryan_chen@...eedtech.com>
---
 Documentation/devicetree/bindings/usb/usb-uhci.yaml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/usb/usb-uhci.yaml b/Documentation/devicetree/bindings/usb/usb-uhci.yaml
index d8336f72dc1f..b1f2b9bd7921 100644
--- a/Documentation/devicetree/bindings/usb/usb-uhci.yaml
+++ b/Documentation/devicetree/bindings/usb/usb-uhci.yaml
@@ -28,6 +28,9 @@ properties:
   interrupts:
     maxItems: 1
 
+  resets:
+    maxItems: 1
+
   '#ports':
     $ref: /schemas/types.yaml#/definitions/uint32
 
-- 
2.34.1