linux-kernel - [PATCH v2 06/12] dt-bindings: usb: usb-device: Add orientation and rotation

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Message-Id: <20250605-uvc-orientation-v2-6-5710f9d030aa@chromium.org>
Date: Thu, 05 Jun 2025 17:52:59 +0000
From: Ricardo Ribalda <ribalda@...omium.org>
To: Laurent Pinchart <laurent.pinchart@...asonboard.com>, 
 Hans de Goede <hdegoede@...hat.com>, 
 Mauro Carvalho Chehab <mchehab@...nel.org>, 
 Hans Verkuil <hverkuil@...all.nl>, 
 Sakari Ailus <sakari.ailus@...ux.intel.com>, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Linus Walleij <linus.walleij@...aro.org>, 
 Bartosz Golaszewski <brgl@...ev.pl>, 
 "Rafael J. Wysocki" <rafael@...nel.org>, Len Brown <lenb@...nel.org>
Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-usb@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-gpio@...r.kernel.org, linux-acpi@...r.kernel.org, 
 Ricardo Ribalda <ribalda@...omium.org>
Subject: [PATCH v2 06/12] dt-bindings: usb: usb-device: Add orientation and
 rotation

For some devices, such as cameras, the OS needs to know where they are
mounted.

ACPI has a property for this purpose, which is parsed by
acpi_get_physical_device_location():
https://uefi.org/htmlspecs/ACPI_Spec_6_4_html/06_Device_Configuration/Device_Configuration.html#pld-physical-location-of-device

In DT we have similar properties for video-interface-devices called
orientation and rotation:
Documentation/devicetree/bindings/media/video-interface-devices.yaml

Add rotation and orientation for usb-devices that matches the already
existing properties of video-interface-devices.

Signed-off-by: Ricardo Ribalda <ribalda@...omium.org>
---
 Documentation/devicetree/bindings/usb/usb-device.yaml | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Documentation/devicetree/bindings/usb/usb-device.yaml b/Documentation/devicetree/bindings/usb/usb-device.yaml
index c676956810331b81f11f3624340fc3e612c98315..a44eb24c657993f88145377a4706ec419b6cd998 100644
--- a/Documentation/devicetree/bindings/usb/usb-device.yaml
+++ b/Documentation/devicetree/bindings/usb/usb-device.yaml
@@ -44,6 +44,14 @@ properties:
       - minimum: 1
         maximum: 255

+  orientation:
+    description: If present, specifies the orientation of the usb device.
+    $ref: /schemas/media/video-interface-devices.yaml#/properties/orientation
+
+  rotation:
+    description: If present, specifies the rotation of the usb device.
+    $ref: /schemas/media/video-interface-devices.yaml#/properties/rotation
+
   "#address-cells":
     description: should be 1 for hub nodes with device nodes,
       should be 2 for device nodes with interface nodes.
@@ -103,6 +111,8 @@ examples:
         device@2 {
             compatible = "usb123,4567";
             reg = <2>;
+            orientation = <0>;
+            rotation = <90>;
         };

         device@3 {

-- 
2.50.0.rc0.642.g800a2b2222-goog