• Benno Rice's avatar
    Allow uart(4)'s ns8250 driver to work with devices whose regshift is > 0. · 58957d87
    Benno Rice authored
    - Rename REG_DL to REG_DLL and REG_DLH.
    - Always treat DLL and DLH as two separate 8-bit registers instead of one
      16-bit register.
    Additionally, remove the probe for the high 4 bits of IER being 0 and don't
    assume we can always read/write 0 to/from those bits.
    These changes allow uart(4) to drive the UARTs on the Intel XScale PXA255.
    Reviewed by:	marcel