dt-bindings: pinctrl: convert nxp,lpc1850-scu.txt to yaml format

Convert nxp,lpc1850-scu.txt to yaml format.

Additional changes:
- keep child name *_cfg to align legancy very old platform dts file.
- remove label in examples.
- just keep one examples.

Signed-off-by: Frank Li <[e-mail]>
Reviewed-by: Rob Herring (Arm) <[e-mail]>
Link: https://lore.kernel.org/[e-mail]
Signed-off-by: Linus Walleij <[e-mail]>

Documentation/devicetree/bindings/pinctrl/nxp,lpc1850-scu.txt

···
-NXP LPC18xx/43xx SCU pin controller Device Tree Bindings
---------------------------------------------------------
-
-Required properties:
-- compatible		: Should be "nxp,lpc1850-scu"
-- reg			: Address and length of the register set for the device
-- clocks		: Clock specifier (see clock bindings for details)
-
-The lpc1850-scu driver uses the generic pin multiplexing and generic pin
-configuration documented in pinctrl-bindings.txt.
-
-The following generic nodes are supported:
- - function
- - pins
- - bias-disable
- - bias-pull-up
- - bias-pull-down
- - drive-strength
- - input-enable
- - input-disable
- - input-schmitt-enable
- - input-schmitt-disable
- - slew-rate
-
-NXP specific properties:
- - nxp,gpio-pin-interrupt : Assign pin to gpio pin interrupt controller
-			    irq number 0 to 7. See example below.
-
-Not all pins support all properties so either refer to the NXP 1850/4350
-user manual or the pin table in the pinctrl-lpc18xx driver for supported
-pin properties.
-
-Example:
-pinctrl: pinctrl@40086000 {
-	compatible = "nxp,lpc1850-scu";
-	reg = <0x40086000 0x1000>;
-	clocks = <&ccu1 CLK_CPU_SCU>;
-
-	i2c0_pins: i2c0-pins {
-		i2c0_pins_cfg {
-			pins = "i2c0_scl", "i2c0_sda";
-			function = "i2c0";
-			input-enable;
-		};
-	};
-
-	uart0_pins: uart0-pins {
-		uart0_rx_cfg {
-			pins = "pf_11";
-			function = "uart0";
-			bias-disable;
-			input-enable;
-		};
-
-		uart0_tx_cfg {
-			pins = "pf_10";
-			function = "uart0";
-			bias-disable;
-		};
-	};
-
-	gpio_joystick_pins: gpio-joystick-pins {
-		gpio_joystick_1_cfg {
-			pins =  "p9_0";
-			function = "gpio";
-			nxp,gpio-pin-interrupt = <0>;
-			input-enable;
-			bias-disable;
-		};
-	};
-};

Documentation/devicetree/bindings/pinctrl/nxp,lpc1850-scu.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pinctrl/nxp,lpc1850-scu.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP LPC18xx/43xx SCU pin controller
+
+description:
+  Not all pins support all pin generic node properties so either refer to
+  the NXP 1850/4350 user manual or the pin table in the pinctrl-lpc18xx
+  driver for supported pin properties.
+
+maintainers:
+  - Frank Li <[e-mail]>
+
+properties:
+  compatible:
+    const: nxp,lpc1850-scu
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+patternProperties:
+  '-pins$':
+    type: object
+    additionalProperties: false
+
+    patternProperties:
+      '_cfg$':
+        type: object
+
+        allOf:
+          - $ref: pincfg-node.yaml#
+          - $ref: pinmux-node.yaml#
+
+        unevaluatedProperties: false
+
+        properties:
+          nxp,gpio-pin-interrupt:
+            $ref: /schemas/types.yaml#/definitions/uint32
+            minimum: 0
+            maximum: 7
+            description:
+              Assign pin to gpio pin interrupt controller
+              irq number 0 to 7. See example below.
+
+required:
+  - compatible
+  - reg
+  - clocks
+
+allOf:
+  - $ref: pinctrl.yaml#
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/lpc18xx-ccu.h>
+
+    pinctrl@40086000 {
+        compatible = "nxp,lpc1850-scu";
+        reg = <0x40086000 0x1000>;
+        clocks = <&ccu1 CLK_CPU_SCU>;
+
+        gpio-joystick-pins {
+            gpio-joystick-1_cfg {
+                pins = "p9_0";
+                function = "gpio";
+                nxp,gpio-pin-interrupt = <0>;
+                input-enable;
+                bias-disable;
+            };
+        };
+    };