[PATCH v4] dt-bindings: usb: uhci: convert to dt schema

[Mohammad Shehar Yaar Tausif]

Convert USB UHCI bindings to DT schema. Documenting aspeed compatibles
and missing properties. Adding aspeed/generic-uhci example and fixing
nodename for the original example.

Signed-off-by: Mohammad Shehar Yaar Tausif <sheharyaar48@xxxxxxxxx>
---
Changes 
v3->v4:
- fix previous incorrect use of if-then block and original example
v2->v3:
- fix property declaration and if-then-else block
- add generic-uhci example and fix prev incorrect example
v1->v2:
- add aspeed compatible and deprecated platform-uhci compatible

v3 patch : https://lore.kernel.org/all/20240422122125.455781-1-sheharyaar48@xxxxxxxxx
v2 patch : https://lore.kernel.org/all/20240422093706.324115-1-sheharyaar48@xxxxxxxxx
v1 patch : https://lore.kernel.org/all/20240420142108.76984-1-sheharyaar48@xxxxxxxxx
---
 .../devicetree/bindings/usb/usb-uhci.txt      | 18 -----
 .../devicetree/bindings/usb/usb-uhci.yaml     | 75 +++++++++++++++++++
 2 files changed, 75 insertions(+), 18 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/usb/usb-uhci.txt
 create mode 100644 Documentation/devicetree/bindings/usb/usb-uhci.yaml

diff --git a/Documentation/devicetree/bindings/usb/usb-uhci.txt b/Documentation/devicetree/bindings/usb/usb-uhci.txt
deleted file mode 100644
index d1702eb2c8bd..000000000000
--- a/Documentation/devicetree/bindings/usb/usb-uhci.txt
+++ /dev/null
@@ -1,18 +0,0 @@
-Generic Platform UHCI Controller
------------------------------------------------------
-
-Required properties:
-- compatible : "generic-uhci" (deprecated: "platform-uhci")
-- reg : Should contain 1 register ranges(address and length)
-- interrupts : UHCI controller interrupt
-
-additionally the properties from usb-hcd.yaml (in the current directory) are
-supported.
-
-Example:
-
-	uhci@d8007b00 {
-		compatible = "generic-uhci";
-		reg = <0xd8007b00 0x200>;
-		interrupts = <43>;
-	};
diff --git a/Documentation/devicetree/bindings/usb/usb-uhci.yaml b/Documentation/devicetree/bindings/usb/usb-uhci.yaml
new file mode 100644
index 000000000000..d8336f72dc1f
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/usb-uhci.yaml
@@ -0,0 +1,75 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/usb-uhci.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Generic Platform UHCI Controller
+
+maintainers:
+  - Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
+
+properties:
+  compatible:
+    oneOf:
+      - const: generic-uhci
+      - const: platform-uhci
+        deprecated: true
+      - items:
+          - enum:
+              - aspeed,ast2400-uhci
+              - aspeed,ast2500-uhci
+              - aspeed,ast2600-uhci
+          - const: generic-uhci
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  '#ports':
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  clocks:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+allOf:
+  - $ref: usb-hcd.yaml
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: generic-uhci
+    then:
+      required:
+        - clocks
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/aspeed-clock.h>
+
+    usb@d8007b00 {
+        compatible = "generic-uhci";
+        reg = <0xd8007b00 0x200>;
+        interrupts = <43>;
+        clocks = <&syscon ASPEED_CLK_GATE_USBUHCICLK>;
+    };
+  - |
+    #include <dt-bindings/clock/aspeed-clock.h>
+
+    usb@1e6b0000 {
+        compatible = "aspeed,ast2500-uhci", "generic-uhci";
+        reg = <0x1e6b0000 0x100>;
+        interrupts = <14>;
+        #ports = <2>;
+        clocks = <&syscon ASPEED_CLK_GATE_USBUHCICLK>;
+    };
+...
-- 
2.44.0