[PATCH v2 1/4] dt-bindings: usb: convert usb-device.txt to YAML schema

* [PATCH v2 1/4] dt-bindings: usb: convert usb-device.txt to YAML schema
@ 2020-10-10  8:43 Chunfeng Yun
  2020-10-10  8:43 ` [PATCH v2 2/4] dt-bindings: usb: add properties for hard wired devices Chunfeng Yun
                   ` (3 more replies)
  0 siblings, 4 replies; 9+ messages in thread
From: Chunfeng Yun @ 2020-10-10  8:43 UTC (permalink / raw)
  To: Rob Herring
  Cc: devicetree, netdev, linux-usb, linux-kernel, Chunfeng Yun,
	linux-mediatek, Greg Kroah-Hartman, Matthias Brugger,
	Jakub Kicinski, David S . Miller, linux-arm-kernel

Convert usb-device.txt to YAML schema usb-device.yaml

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
---
v2: new patch suggested by Rob
---
 .../devicetree/bindings/usb/usb-device.txt    | 102 --------------
 .../devicetree/bindings/usb/usb-device.yaml   | 129 ++++++++++++++++++
 2 files changed, 129 insertions(+), 102 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/usb/usb-device.txt
 create mode 100644 Documentation/devicetree/bindings/usb/usb-device.yaml

diff --git a/Documentation/devicetree/bindings/usb/usb-device.txt b/Documentation/devicetree/bindings/usb/usb-device.txt
deleted file mode 100644
index 036be172b1ae..000000000000
--- a/Documentation/devicetree/bindings/usb/usb-device.txt
+++ /dev/null
@@ -1,102 +0,0 @@
-Generic USB Device Properties
-
-Usually, we only use device tree for hard wired USB device.
-The reference binding doc is from:
-http://www.devicetree.org/open-firmware/bindings/usb/usb-1_0.ps
-
-Four types of device-tree nodes are defined: "host-controller nodes"
-representing USB host controllers, "device nodes" representing USB devices,
-"interface nodes" representing USB interfaces and "combined nodes"
-representing simple USB devices.
-
-A combined node shall be used instead of a device node and an interface node
-for devices of class 0 or 9 (hub) with a single configuration and a single
-interface.
-
-A "hub node" is a combined node or an interface node that represents a USB
-hub.
-
-
-Required properties for device nodes:
-- compatible: "usbVID,PID", where VID is the vendor id and PID the product id.
-  The textual representation of VID and PID shall be in lower case hexadecimal
-  with leading zeroes suppressed. The other compatible strings from the above
-  standard binding could also be used, but a device adhering to this binding
-  may leave out all except for "usbVID,PID".
-- reg: the number of the USB hub port or the USB host-controller port to which
-  this device is attached. The range is 1-255.
-
-
-Required properties for device nodes with interface nodes:
-- #address-cells: shall be 2
-- #size-cells: shall be 0
-
-
-Required properties for interface nodes:
-- compatible: "usbifVID,PID.configCN.IN", where VID is the vendor id, PID is
-  the product id, CN is the configuration value and IN is the interface
-  number. The textual representation of VID, PID, CN and IN shall be in lower
-  case hexadecimal with leading zeroes suppressed. The other compatible
-  strings from the above standard binding could also be used, but a device
-  adhering to this binding may leave out all except for
-  "usbifVID,PID.configCN.IN".
-- reg: the interface number and configuration value
-
-The configuration component is not included in the textual representation of
-an interface-node unit address for configuration 1.
-
-
-Required properties for combined nodes:
-- compatible: "usbVID,PID", where VID is the vendor id and PID the product id.
-  The textual representation of VID and PID shall be in lower case hexadecimal
-  with leading zeroes suppressed. The other compatible strings from the above
-  standard binding could also be used, but a device adhering to this binding
-  may leave out all except for "usbVID,PID".
-- reg: the number of the USB hub port or the USB host-controller port to which
-  this device is attached. The range is 1-255.
-
-
-Required properties for hub nodes with device nodes:
-- #address-cells: shall be 1
-- #size-cells: shall be 0
-
-
-Required properties for host-controller nodes with device nodes:
-- #address-cells: shall be 1
-- #size-cells: shall be 0
-
-
-Example:
-
-&usb1 {	/* host controller */
-	#address-cells = <1>;
-	#size-cells = <0>;
-
-	hub@1 {		/* hub connected to port 1 */
-		compatible = "usb5e3,608";
-		reg = <1>;
-	};
-
-	device@2 {	/* device connected to port 2 */
-		compatible = "usb123,4567";
-		reg = <2>;
-	};
-
-	device@3 { 	/* device connected to port 3 */
-		compatible = "usb123,abcd";
-		reg = <3>;
-
-		#address-cells = <2>;
-		#size-cells = <0>;
-
-		interface@0 {	/* interface 0 of configuration 1 */
-			compatible = "usbif123,abcd.config1.0";
-			reg = <0 1>;
-		};
-
-		interface@0,2 {	/* interface 0 of configuration 2 */
-			compatible = "usbif123,abcd.config2.0";
-			reg = <0 2>;
-		};
-	};
-};
diff --git a/Documentation/devicetree/bindings/usb/usb-device.yaml b/Documentation/devicetree/bindings/usb/usb-device.yaml
new file mode 100644
index 000000000000..57e716b8cd29
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/usb-device.yaml
@@ -0,0 +1,129 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/usb-device.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: The device tree bindings for the Generic USB Device
+
+maintainers:
+  - Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+description: |
+  Usually, we only use device tree for hard wired USB device.
+  The reference binding doc is from:
+  http://www.devicetree.org/open-firmware/bindings/usb/usb-1_0.ps
+
+  Four types of device-tree nodes are defined: "host-controller nodes"
+  representing USB host controllers, "device nodes" representing USB devices,
+  "interface nodes" representing USB interfaces and "combined nodes"
+  representing simple USB devices.
+
+  A combined node shall be used instead of a device node and an interface node
+  for devices of class 0 or 9 (hub) with a single configuration and a single
+  interface.
+
+  A "hub node" is a combined node or an interface node that represents a USB
+  hub.
+
+properties:
+  $nodename:
+    description: Usually includes "hub" or the standard node name for
+      USB class of device, for example, "ethernet" for the USB ethernet
+      adapter, "bt" for btusb, "camera" for the USB image sensor etc.
+    pattern: "^[a-f]+@[0-9a-f]+$"
+
+  compatible:
+    description: Device nodes or combined nodes.
+      "usbVID,PID", where VID is the vendor id and PID the product id.
+      The textual representation of VID and PID shall be in lower case
+      hexadecimal with leading zeroes suppressed. The other compatible
+      strings from the above standard binding could also be used,
+      but a device adhering to this binding may leave out all except
+      for "usbVID,PID".
+    items:
+      - pattern: "^usb[0-9a-f]+,[0-9a-f]+$"
+
+  reg:
+    description: the number of the USB hub port or the USB host-controller
+      port to which this device is attached. The range is 1-255.
+    maxItems: 1
+
+  "#address-cells":
+    description: should be 1 for hub nodes with device nodes,
+      should be 2 for device nodes with interface nodes.
+    enum: [1, 2]
+
+  "#size-cells":
+    const: 0
+
+patternProperties:
+  "^interface@[0-9]+(,[0-9]+)$":
+    type: object
+    description: USB interface nodes.
+      The configuration component is not included in the textual
+      representation of an interface-node unit address for configuration 1.
+
+    properties:
+      compatible:
+        description: |
+          "usbifVID,PID.configCN.IN", where VID is the vendor id, PID is
+          the product id, CN is the configuration value and IN is the interface
+          number. The textual representation of VID, PID, CN and IN shall be
+          in lower case hexadecimal with leading zeroes suppressed.
+          The other compatible strings from the above standard binding could
+          also be used, but a device adhering to this binding may leave out
+          all except for "usbifVID,PID.configCN.IN".
+        items:
+          - pattern: "^usbif[0-9a-f]+,[0-9a-f]+.config[0-9a-f]+.[0-9a-f]+$"
+
+      reg:
+        description: should be 2 cells long, the first cell represents
+          the interface number and the second cell represents the
+          configuration value.
+        maxItems: 1
+
+required:
+  - compatile
+  - reg
+
+examples:
+  #hub connected to port 1
+  #device connected to port 2
+  #device connected to port 3
+  #    interface 0 of configuration 1
+  #    interface 0 of configuration 2
+  - |
+    usb@11270000 {
+        reg = <0x11270000 0x1000>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        hub@1 {
+            compatible = "usb5e3,608";
+            reg = <1>;
+        };
+
+        device@2 {
+            compatible = "usb123,4567";
+            reg = <2>;
+        };
+
+        device@3 {
+            compatible = "usb123,abcd";
+            reg = <3>;
+
+            #address-cells = <2>;
+            #size-cells = <0>;
+
+            interface@0 {
+                compatible = "usbif123,abcd.config1.0";
+                reg = <0 1>;
+            };
+
+            interface@0,2 {
+                compatible = "usbif123,abcd.config2.0";
+                reg = <0 2>;
+            };
+        };
+    };
-- 
2.18.0
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