zmk/app/boards/polarityworks/bt60/board.yml

boards:
  - name: bt60_hs
    vendor: polarityworks
    socs:
      - name: nrf52840
  - name: bt60
    vendor: polarityworks
    socs:
      - name: nrf52840
    revision:
      format: major.minor.patch
      default: 2.0.0
      revisions:
        - name: 1.0.0
        - name: 2.0.0