[RFC PATCH 0/2] serial: 8250_dw: IO space + polling mode support

[John Garry <john.garry@huawei.com>]

There is a requirement for supporting an 8250-compatible UART with
the following profile/features:
- platform device
- polling mode (i.e. no interrupt support)
- ACPI FW
- IO port iotype
- 16550-compatible

For OF, we have 8250_of.c, and for PNP device we have 8250_pnp.c
drivers. However there does not seem to any driver satisfying
the above requirements. So this RFC is to find opinion on
modifying the Synopsys DW 8250_dw.c driver to support these
generic features.

With patch 2/2, we're relaxing the interrupt support requirement.
As I mentioned in the commit log, the 8250_of.c driver seems to
ignore the dt bindings, and I do the same.

John Garry (2):
  serial: 8250_dw: add IO space support
  serial: 8250_dw: support polling mode

 drivers/tty/serial/8250/8250_dw.c | 32 +++++++++++++++++++++-----------
 1 file changed, 21 insertions(+), 11 deletions(-)

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1.9.1