[PATCH] dt-bindings: mfd: Convert OMAP USB TLL to DT schema

[Eduard Bostina <egbostina@gmail.com>]

Convert the OMAP HS USB Host TLL bindings to DT schema.

During the conversion, ti,hwmods has been made optional to resolve
dtbs_check warnings. Modern OMAP platforms do not require this
property, but it is still required for older platforms.

Signed-off-by: Eduard Bostina <egbostina@gmail.com>
---
 .../devicetree/bindings/mfd/omap-usb-tll.txt  | 27 ----------
 .../devicetree/bindings/mfd/ti,usbhs-tll.yaml | 53 +++++++++++++++++++
 2 files changed, 53 insertions(+), 27 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/mfd/omap-usb-tll.txt
 create mode 100644 Documentation/devicetree/bindings/mfd/ti,usbhs-tll.yaml

diff --git a/Documentation/devicetree/bindings/mfd/omap-usb-tll.txt b/Documentation/devicetree/bindings/mfd/omap-usb-tll.txt
deleted file mode 100644
index c58d70437fce..000000000000
--- a/Documentation/devicetree/bindings/mfd/omap-usb-tll.txt
+++ /dev/null
@@ -1,27 +0,0 @@
-OMAP HS USB Host TLL (Transceiver-Less Interface)
-
-Required properties:
-
-- compatible : should be "ti,usbhs-tll"
-- reg : should contain one register range i.e. start and length
-- interrupts : should contain the TLL module's interrupt
-- ti,hwmod : must contain "usb_tll_hs"
-
-Optional properties:
-
-- clocks: a list of phandles and clock-specifier pairs, one for each entry in
-  clock-names.
-
-- clock-names: should include:
-  * "usb_tll_hs_usb_ch0_clk" - USB TLL channel 0 clock
-  * "usb_tll_hs_usb_ch1_clk" - USB TLL channel 1 clock
-  * "usb_tll_hs_usb_ch2_clk" - USB TLL channel 2 clock
-
-Example:
-
-	usbhstll: usbhstll@4a062000 {
-		compatible = "ti,usbhs-tll";
-		reg = <0x4a062000 0x1000>;
-		interrupts = <78>;
-		ti,hwmods = "usb_tll_hs";
-	  };
diff --git a/Documentation/devicetree/bindings/mfd/ti,usbhs-tll.yaml b/Documentation/devicetree/bindings/mfd/ti,usbhs-tll.yaml
new file mode 100644
index 000000000000..78f7a109392c
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/ti,usbhs-tll.yaml
@@ -0,0 +1,53 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/ti,usbhs-tll.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: OMAP HS USB Host TLL (Transceiver-Less Interface)
+
+maintainers:
+  - Eduard Bostina <egbostina@gmail.com>
+
+properties:
+  compatible:
+    const: ti,usbhs-tll
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  ti,hwmods:
+    description: Name of the hwmod associated with the USB TLL.
+    $ref: /schemas/types.yaml#/definitions/string
+    const: usb_tll_hs
+
+  clocks:
+    minItems: 1
+    maxItems: 3
+    description: A list of phandles and clock-specifier pairs.
+
+  clock-names:
+    minItems: 1
+    items:
+      - const: usb_tll_hs_usb_ch0_clk
+      - const: usb_tll_hs_usb_ch1_clk
+      - const: usb_tll_hs_usb_ch2_clk
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+additionalProperties: false
+
+examples:
+  - |
+    usb-tll@4a062000 {
+        compatible = "ti,usbhs-tll";
+        reg = <0x4a062000 0x1000>;
+        interrupts = <78>;
+        ti,hwmods = "usb_tll_hs";
+    };
-- 
2.43.0