TI/National Semiconductor LP3943 MFD driver

Required properties:
  - compatible: "ti,lp3943"
  - reg: I2C slave address. From 0x60 to 0x67.

LP3943 consists of two sub-devices, lp3943-gpio and lp3943-pwm.

For the LP3943 GPIO properties please refer to:
Documentation/devicetree/bindings/gpio/trivial-gpio.yaml

For the LP3943 PWM properties please refer to:
Documentation/devicetree/bindings/pwm/pwm-lp3943.txt

Example:

lp3943@60 {
	compatible = "ti,lp3943";
	reg = <0x60>;

	gpioex: gpio {
		compatible = "ti,lp3943-gpio";
		gpio-controller;
		#gpio-cells = <2>;
	};

	pwm3943: pwm {
		compatible = "ti,lp3943-pwm";
		#pwm-cells = <2>;
		ti,pwm0 = <8 9 10>;
		ti,pwm1 = <15>;
	};
};