NXP LPC18xx/43xx SCU pin controller Device Tree Bindings
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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

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;
		};
	};
};