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1Cavium ThunderX/OCTEON-TX GPIO controller bindings2 3Required Properties:4- reg: The controller bus address.5- gpio-controller: Marks the device node as a GPIO controller.6- #gpio-cells: Must be 2.7 - First cell is the GPIO pin number relative to the controller.8 - Second cell is a standard generic flag bitfield as described in gpio.txt.9 10Optional Properties:11- compatible: "cavium,thunder-8890-gpio", unused as PCI driver binding is used.12- interrupt-controller: Marks the device node as an interrupt controller.13- #interrupt-cells: Must be present and have value of 2 if14 "interrupt-controller" is present.15 - First cell is the GPIO pin number relative to the controller.16 - Second cell is triggering flags as defined in interrupts.txt.17 18Example:19 20gpio_6_0: gpio@6,0 {21 compatible = "cavium,thunder-8890-gpio";22 reg = <0x3000 0 0 0 0>; /* DEVFN = 0x30 (6:0) */23 gpio-controller;24 #gpio-cells = <2>;25 interrupt-controller;26 #interrupt-cells = <2>;27};28