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Subject[PATCH 0/8] serial: 8250: Add 485 emulation to 8250_dw.
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Need to handle rs485 with 8250_dw port.

Use existing em485 emulation layer for 8250 taking care to fix some bug
and taking care especially of RTS_AFTER_SEND case.

Giulio Benetti (8):
serial: 8250_dw: add em485 support
serial: 8250_dw: allow enable rs485 at boot time
serial: 8250: Copy em485 from port to real port.
serial: 8250: Handle case port doesn't have TEMT interrupt using
em485.
serial: 8250_dw: treat rpm suspend with -EBUSY if RS485 ON and
RTS_AFTER_SEND
serial: 8250: Copy mctrl when register port.
serial: 8250: Make em485_rts_after_send() set mctrl according to rts
state.
serial: core: Mask mctrl with TIOCM_RTS too if rs485 on and
RTS_AFTER_SEND set.

drivers/tty/serial/8250/8250.h | 2 +-
drivers/tty/serial/8250/8250_core.c | 2 ++
drivers/tty/serial/8250/8250_dw.c | 41 ++++++++++++++++++++++++++++-
drivers/tty/serial/8250/8250_omap.c | 2 +-
drivers/tty/serial/8250/8250_port.c | 33 ++++++++++++++++-------
drivers/tty/serial/serial_core.c | 12 ++++++++-
include/linux/serial_8250.h | 1 +
7 files changed, 79 insertions(+), 14 deletions(-)

--
2.17.0

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