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1* Technologic Systems I2C-FPGA's GPIO controller bindings2 3This bindings describes the GPIO controller for Technologic's FPGA core.4TS-4900's FPGA encodes the GPIO state on 3 bits, whereas the TS-7970's FPGA5uses 2 bits: it doesn't use a dedicated input bit.6 7Required properties:8- compatible: Should be one of the following9 "technologic,ts4900-gpio"10 "technologic,ts7970-gpio"11- reg: Physical base address of the controller and length12 of memory mapped region.13- #gpio-cells: Should be two. The first cell is the pin number.14- gpio-controller: Marks the device node as a gpio controller.15 16Optional property:17- ngpios: Number of GPIOs this controller is instantiated with,18 the default is 32. See gpio.txt for more details.19 20Example:21 22&i2c2 {23 gpio8: gpio@28 {24 compatible = "technologic,ts4900-gpio";25 reg = <0x28>;26 #gpio-cells = <2>;27 gpio-controller;28 ngpios = <32>;29 };30};31