1Synopsys GPIO via CREG (Control REGisters) driver
2
3Required properties:
4- compatible : "snps,creg-gpio-hsdk" or "snps,creg-gpio-axs10x".
5- reg : Exactly one register range with length 0x4.
6- #gpio-cells : Since the generic GPIO binding is used, the
7  amount of cells must be specified as 2. The first cell is the
8  pin number, the second cell is used to specify optional parameters:
9  See "gpio-specifier" in .../devicetree/bindings/gpio/gpio.txt.
10- gpio-controller : Marks the device node as a GPIO controller.
11- ngpios: Number of GPIO pins.
12
13Example:
14
15gpio: gpio@f00014b0 {
16	compatible = "snps,creg-gpio-hsdk";
17	reg = <0xf00014b0 0x4>;
18	gpio-controller;
19	#gpio-cells = <2>;
20	ngpios = <2>;
21};
22