Kernel-4.18.0-80.el8_gpio-ts4900

• Technologic Systems I2C-FPGA’s GPIO controller bindings

This bindings describes the GPIO controller for Technologic’s FPGA core.
TS-4900’s FPGA encodes the GPIO state on 3 bits, whereas the TS-7970’s FPGA
uses 2 bits: it doesn’t use a dedicated input bit.

Required properties:

• compatible: Should be one of the following

    "technologic,ts4900-gpio"
    "technologic,ts7970-gpio"
  

• reg: Physical base address of the controller and length

   of memory mapped region.
  

• #gpio-cells: Should be two. The first cell is the pin number.
• gpio-controller: Marks the device node as a gpio controller.

Optional property:

• ngpios: Number of GPIOs this controller is instantiated with,
  the default is 32. See gpio.txt for more details.

Example:

&i2c2 {
gpio8: gpio@28 {
compatible = “technologic,ts4900-gpio”;
reg = <0x28>;
#gpio-cells = <2>;
gpio-controller;
ngpios = <32>;
};
};