qmk-firmware/keyboards/swiftrax/retropad/info.json

{
    "keyboard_name": "Retropad", 
    "manufacturer": "Swiftrax",
    "url": "https://github.com/swiftrax", 
    "maintainer": "swiftrax", 
    "usb": {
        "vid": "0x04D8",
        "pid": "0xEB0C",
        "device_version": "0.0.1"
    },
    "encoder": {
        "rotary": [
            {"pin_a": "D0", "pin_b": "D1"}
        ]
    },
    "bootmagic": {
        "matrix": [1, 0]
    },
    "processor": "atmega32u2",
    "bootloader": "atmel-dfu",
    "layouts": {
        "LAYOUT": {
            "layout": [{"label":"0,1", "x":0.5, "y":0}, {"label":"1,0", "x":0, "y":1.5}, {"label":"1,1", "x":1, "y":1.5}, {"label":"2,0", "x":0, "y":2.5}, {"label":"2,1", "x":1, "y":2.5}]
        }
    }
}