[PATCH v3] dt-bindings: pinctrl: microchip,pic32mzda-pinctrl: Convert to DT schema

[Udaya Kiran Challa <challauday369@gmail.com>]

Convert Microchip PIC32 Pin Controller devicetree binding
from legacy text format to DT schema.

Signed-off-by: Udaya Kiran Challa <challauday369@gmail.com>
---
Changelog:
Changes since v2:
- Add container node for grouped pin configuration sub-nodes
- Correct regex patterns of direct and nested child nodes
- Fix interrupts values in uart2 example

Link to v2:https://lore.kernel.org/all/20260707144223.120417-1-challauday369@gmail.com/

Changes since v1:
- Add interrupts and clocks to uart2 example to satisfy uart schema validation
- Corect regex patterns to accept standard DT node naming conventions
- Add function property to top-level pin configuration nodes
- Remove restrictive enum from function property to support all mux functions

Link to v1:https://lore.kernel.org/all/20260705132521.159522-1-challauday369@gmail.com/
---
 .../pinctrl/microchip,pic32-pinctrl.txt       |  60 -------
 .../pinctrl/microchip,pic32mzda-pinctrl.yaml  | 153 ++++++++++++++++++
 2 files changed, 153 insertions(+), 60 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/pinctrl/microchip,pic32-pinctrl.txt
 create mode 100644 Documentation/devicetree/bindings/pinctrl/microchip,pic32mzda-pinctrl.yaml

diff --git a/Documentation/devicetree/bindings/pinctrl/microchip,pic32-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/microchip,pic32-pinctrl.txt
deleted file mode 100644
index 51efd2085113..000000000000
--- a/Documentation/devicetree/bindings/pinctrl/microchip,pic32-pinctrl.txt
+++ /dev/null
@@ -1,60 +0,0 @@
-* Microchip PIC32 Pin Controller
-
-Please refer to pinctrl-bindings.txt, ../gpio/gpio.txt, and
-../interrupt-controller/interrupts.txt for generic information regarding
-pin controller, GPIO, and interrupt bindings.
-
-PIC32 'pin configuration node' is a node of a group of pins which can be
-used for a specific device or function. This node represents configurations of
-pins, optional function, and optional mux related configuration.
-
-Required properties for pin controller node:
- - compatible: "microchip,pic32mada-pinctrl"
- - reg: Address range of the pinctrl registers.
- - clocks: Clock specifier (see clock bindings for details)
-
-Required properties for pin configuration sub-nodes:
- - pins: List of pins to which the configuration applies.
-
-Optional properties for pin configuration sub-nodes:
-----------------------------------------------------
- - function: Mux function for the specified pins.
- - bias-pull-up: Enable weak pull-up.
- - bias-pull-down: Enable weak pull-down.
- - input-enable: Set the pin as an input.
- - output-low: Set the pin as an output level low.
- - output-high: Set the pin as an output level high.
- - microchip,digital: Enable digital I/O.
- - microchip,analog: Enable analog I/O.
-
-Example:
-
-pic32_pinctrl: pinctrl@1f801400{
-	#address-cells = <1>;
-	#size-cells = <1>;
-	compatible = "microchip,pic32mzda-pinctrl";
-	reg = <0x1f801400 0x400>;
-	clocks = <&rootclk PB1CLK>;
-
-	pinctrl_uart2: pinctrl_uart2 {
-		uart2-tx {
-			pins = "G9";
-			function = "U2TX";
-			microchip,digital;
-			output-low;
-		};
-		uart2-rx {
-			pins = "B0";
-			function = "U2RX";
-			microchip,digital;
-			input-enable;
-		};
-	};
-};
-
-uart2: serial@1f822200 {
-	compatible = "microchip,pic32mzda-uart";
-	reg = <0x1f822200 0x50>;
-	pinctrl-names = "default";
-	pinctrl-0 = <&pinctrl_uart2>;
-};
diff --git a/Documentation/devicetree/bindings/pinctrl/microchip,pic32mzda-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/microchip,pic32mzda-pinctrl.yaml
new file mode 100644
index 000000000000..7a36e5ff61dd
--- /dev/null
+++ b/Documentation/devicetree/bindings/pinctrl/microchip,pic32mzda-pinctrl.yaml
@@ -0,0 +1,153 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pinctrl/microchip,pic32mzda-pinctrl.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Microchip PIC32 Pin Controller
+
+maintainers:
+  - Linus Walleij <linusw@kernel.org>
+
+description: |
+  PIC32 pin configuration node is a node of a group of pins which can be used
+  for a specific device or function. This node represents configurations of
+  pins, optional function, and optional mux related configuration.
+
+properties:
+  compatible:
+    const: microchip,pic32mzda-pinctrl
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    const: 1
+
+patternProperties:
+  '^(?!pinctrl_)[a-z]+[0-9]*_[a-z0-9_]+$':
+    type: object
+    $ref: pinmux-node.yaml#
+
+    properties:
+      pins:
+        description: |
+          List of pins to which the configuration applies.
+        items:
+          type: string
+        minItems: 1
+
+      function: true
+
+      bias-pull-up: true
+      bias-pull-down: true
+      input-enable: true
+      output-low: true
+      output-high: true
+
+      microchip,digital:
+        description: Enable digital I/O.
+        type: boolean
+
+      microchip,analog:
+        description: Enable analog I/O.
+        type: boolean
+
+    required:
+      - pins
+
+    unevaluatedProperties: false
+
+  '^pinctrl_[a-z0-9_-]+$|^[a-z]+[0-9]+-[0-9]+$':
+    type: object
+    description: |
+      Container node for grouped pin configuration sub-nodes.
+
+    patternProperties:
+      '^[a-z]+[0-9]+-[a-z]+$':
+        type: object
+        $ref: pinmux-node.yaml#
+
+        properties:
+          pins:
+            description: |
+              List of pins to which the configuration applies.
+            items:
+              type: string
+            minItems: 1
+
+          function: true
+
+          bias-pull-up: true
+          bias-pull-down: true
+          input-enable: true
+          output-low: true
+          output-high: true
+
+          microchip,digital:
+            description: Enable digital I/O.
+            type: boolean
+
+          microchip,analog:
+            description: Enable analog I/O.
+            type: boolean
+
+        required:
+          - pins
+
+        unevaluatedProperties: false
+
+    unevaluatedProperties: false
+
+required:
+  - compatible
+  - reg
+  - clocks
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/microchip,pic32-clock.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    pic32_pinctrl: pinctrl@1f801400 {
+        #address-cells = <1>;
+        #size-cells = <1>;
+        compatible = "microchip,pic32mzda-pinctrl";
+        reg = <0x1f801400 0x400>;
+        clocks = <&rootclk PB1CLK>;
+
+        pinctrl_uart2: pinctrl_uart2 {
+            uart2-tx {
+                pins = "G9";
+                function = "U2TX";
+                microchip,digital;
+                output-low;
+            };
+
+            uart2-rx {
+                pins = "B0";
+                function = "U2RX";
+                microchip,digital;
+                input-enable;
+            };
+        };
+    };
+
+    uart2: serial@1f822200 {
+        compatible = "microchip,pic32mzda-uart";
+        reg = <0x1f822200 0x50>;
+        interrupts = <145 IRQ_TYPE_LEVEL_HIGH>,
+                     <146 IRQ_TYPE_LEVEL_HIGH>,
+                     <147 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&rootclk PB2CLK>;
+        pinctrl-names = "default";
+        pinctrl-0 = <&pinctrl_uart2>;
+    };
-- 
2.34.1