On Thu, Dec 24, 2015 at 06:15:14PM +0300, Sergei Ianovich wrote:

pxa2xx-uart was a separate uart platform driver. It was declaring
the same device names and numbers as 8250 driver. As a result,
it was impossible to use 8250 driver on PXA SoCs.

Upon closer examination pxa2xx-uart turned out to be a clone of
8250_core driver.

Workaround for Erratum #19 according to Marvel(R) PXA270M Processor
Specification Update (April 19, 2010) is dropped. 8250_core reads
from FIFO immediately after checking DR bit in LSR.

The patch leaves the original SERIAL_PXA driver around. The original
driver is just marked DEPRECATED in Kconfig and C source. When
the original driver is considered safe to remove, no changes
to SERIAL_8250 will be necessary.

But, you just broke existing configurations, right?  The serial port is
a different name now, are you willing to handle the angry users?

If so, great, get the platform maintainer to sign off on this please and
then resend it.

thanks,

greg k-h