qmk_firmware_custom/keyboards/puck/info.json

{
  "keyboard_name": "Puck", 
  "url": "", 
  "maintainer": "john-pettigrew", 
  "width": 3, 
  "height": 4, 
  "layouts": {
    "LAYOUT": {
      "layout": [
        {"label":"SW1", "x":0, "y":0}, 
        {"label":"SW2", "x":1, "y":0}, 
        {"label":"SW3", "x":2, "y":0}, 
        {"label":"SW4", "x":0, "y":1}, 
        {"label":"SW5", "x":1, "y":1}, 
        {"label":"SW6", "x":2, "y":1}, 
        {"label":"SW7", "x":0, "y":2}, 
        {"label":"SW8", "x":1, "y":2}, 
        {"label":"SW9", "x":2, "y":2}, 
        {"label":"SW10", "x":0, "y":3}, 
        {"label":"SW11", "x":1, "y":3}, 
        {"label":"SW12", "x":2, "y":3}
      ]
    }
  }
}