linux-kernel - [PATCH 5/8] dt-bindings: usb: usb-device: Add orientation

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Message-Id: <20250403-uvc-orientation-v1-5-1a0cc595a62d@chromium.org>
Date: Thu, 03 Apr 2025 19:16:16 +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>
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, Ricardo Ribalda <ribalda@...omium.org>
Subject: [PATCH 5/8] dt-bindings: usb: usb-device: Add orientation

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 property for video-interface-devices called
orientation:
Documentation/devicetree/bindings/media/video-interface-devices.yaml

Add a new property orientation for usb-devices that matches the already
existing orientation property of video-interface-devices.

Signed-off-by: Ricardo Ribalda <ribalda@...omium.org>
---
 Documentation/devicetree/bindings/usb/usb-device.yaml | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/usb/usb-device.yaml b/Documentation/devicetree/bindings/usb/usb-device.yaml
index da890ee60ce6e71a11910c565b6f805470782e4f..bbcda28ec7d5695307efa797f57180044afda77f 100644
--- a/Documentation/devicetree/bindings/usb/usb-device.yaml
+++ b/Documentation/devicetree/bindings/usb/usb-device.yaml
@@ -42,6 +42,10 @@ properties:
       port to which this device is attached. The range is 1-255.
     maxItems: 1
 
+  orientation:
+    description: If present, specifies the orientation of the usb device.
+    $ref: /schemas/media/video-interface-devices.yaml#/properties/orientation
+
   "#address-cells":
     description: should be 1 for hub nodes with device nodes,
       should be 2 for device nodes with interface nodes.
@@ -101,6 +105,7 @@ examples:
         device@2 {
             compatible = "usb123,4567";
             reg = <2>;
+            orientation = <0>;
         };
 
         device@3 {

-- 
2.49.0.504.g3bcea36a83-goog