serial: 8250_mxpcie: add break support for RS485 using MUEx50 features

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On MUEx50, break signaling under RS485 requires a driver-specific
sequence and cannot be handled correctly by the generic 8250 break
implementation alone.

Implement a mxpcie break_ctl callback that performs MUEx50-specific
break handling when RS485 is enabled and fall back to the default 8250
break handling for other modes.

Signed-off-by: Crescent Hsieh <crescentcy.hsieh@moxa.com>
Link: https://patch.msgid.link/20260731074820.735619-12-crescentcy.hsieh@moxa.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Crescent Hsieh 2026-07-31 15:48:17 +08:00 • committed by Greg Kroah-Hartman

parent af1ba61b62

commit ade78d3d25

1 changed files with 48 additions and 0 deletions

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drivers/tty/serial/8250/8250_mxpcie.c

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