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"
    },
    "matrix_pins": {
        "cols": ["B4", "D2"],
        "rows": ["C7", "C6", "B5"]
    },
    "diode_direction": "COL2ROW",
    "encoder": {
        "rotary": [
            {"pin_a": "D0", "pin_b": "D1"}
        ]
    },
    "bootmagic": {
        "matrix": [1, 0]
    },
    "processor": "atmega32u2",
    "bootloader": "atmel-dfu",
    "layouts": {
        "LAYOUT": {
            "layout": [
                {"matrix": [0, 1], "x": 0.5, "y": 0},

                {"matrix": [1, 0], "x": 0, "y": 1.5},
                {"matrix": [1, 1], "x": 1, "y": 1.5},

                {"matrix": [2, 0], "x": 0, "y": 2.5},
                {"matrix": [2, 1], "x": 1, "y": 2.5}
            ]
        }
    }
}