linux-kernel - [PATCH 1/4] dt-bindings: phy: rockchip,inno-usb2phy: add port property

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Message-Id: <20250407-rk3576-sige5-usb-v1-1-67eec166f82f@collabora.com>
Date: Mon, 07 Apr 2025 20:09:14 +0200
From: Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
To: Vinod Koul <vkoul@...nel.org>, 
 Kishon Vijay Abraham I <kishon@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Heiko Stuebner <heiko@...ech.de>, 
 Kever Yang <kever.yang@...k-chips.com>, 
 Frank Wang <frank.wang@...k-chips.com>
Cc: Sebastian Reichel <sebastian.reichel@...labora.com>, 
 kernel@...labora.com, linux-phy@...ts.infradead.org, 
 devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
Subject: [PATCH 1/4] dt-bindings: phy: rockchip,inno-usb2phy: add port
 property

USB connectors like to have OF graph connections to high-speed related
nodes to do various things. In the case of the RK3576, we can make use
of a port in the usb2 PHY to detect whether the OTG controller is
connected to a type C port and apply some special behaviour accordingly.

The usefulness of having different bits of a fully functioning USB stack
point to each other is more general though, and not constrained to
RK3576 at all, even for this use-case.

Add a port property to the binding.

Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
---
 Documentation/devicetree/bindings/phy/rockchip,inno-usb2phy.yaml | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/phy/rockchip,inno-usb2phy.yaml b/Documentation/devicetree/bindings/phy/rockchip,inno-usb2phy.yaml
index 6a7ef556414cebad63c10de754778f84fd4486ee..3a662bfc353250a8ad9386ebb5575d1e84c1b5ba 100644
--- a/Documentation/devicetree/bindings/phy/rockchip,inno-usb2phy.yaml
+++ b/Documentation/devicetree/bindings/phy/rockchip,inno-usb2phy.yaml
@@ -78,6 +78,11 @@ properties:
       When set the driver will request its phandle as one companion-grf
       for some special SoCs (e.g rv1108).
 
+  port:
+    $ref: /schemas/graph.yaml#/properties/port
+    description:
+      A port node to link the PHY to a USB connector's "high-speed" port.
+
   host-port:
     type: object
     additionalProperties: false

-- 
2.49.0