transforms:
  ### Start of making DataRegs block ###

  # Make a DataRegs block that contain DR and DWR register,
  # then let Tx and Rx use that block

  # Eliminate Field name difference between Tx and Rx
  - !RenameFields
    fieldset: ^[RT]DR$
    from: (R|T)(DB)\d
    to: $2
  - !MakeFieldArray
    fieldsets: ^[RT]DWR$
    from: (R|T)(DB)\d
    to: $2

  # Make Tx and Rx register use same DR and DWR fieldsets
  # We can't tell whether Tx or Rx registers left after previous transforms, so we match both T and R for safe.
  - !MergeFieldsets
    from: ^[TR](DW?R)$
    to: $1

  # Extract DR and DWR into DataRegs, left T and R as prefix
  - !MakeBlock
    blocks: ^I3C$
    from: ^(R|T)(DW?R)$
    to_outer: ${1}DataRegs
    to_block: DataRegs
    to_inner: ${2}

  # Expand single letter T and R to Tx and Rx, make it more readable
  - !RenameRegisters
    block: I3C
    from: (T|R)(DataRegs)
    to: ${1}x${2}

  ### End of making DataRegs block ###

  - !MakeFieldArray
    fieldsets: IBIDR
    from: ^(IBIDB)\d$
    to: $1

  - !MergeFieldsets
    from: ^(DEVR)[1-4]$
    to: $1

  - !MakeRegisterArray
    blocks: I3C
    from: ^(DEVR)[1-4]$
    to: $1

  - !RenameFields
    fieldset: ^MAX[RW]LR$
    from: ^M[RW]L$
    to: ML