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