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/freebsd-10.2-release/sys/dev/ic/
H A Dns16550.hdiff 158844 Tue May 23 00:41:12 MDT 2006 benno Allow uart(4)'s ns8250 driver to work with devices whose regshift is > 0.

- 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
/freebsd-10.2-release/sys/dev/uart/
H A Duart_dev_ns8250.cdiff 158844 Tue May 23 00:41:12 MDT 2006 benno Allow uart(4)'s ns8250 driver to work with devices whose regshift is > 0.

- 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

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