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| author | Crescent Hsieh <crescentcy.hsieh@moxa.com> | 2026-07-31 15:48:15 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-08-03 16:51:57 +0200 |
| commit | d21a1509c62386200c09ed102983b8d79a1b0485 (patch) | |
| tree | 42c547aa02f283ea3d6f8f5fe496ae177f4c8d7d /tools/perf/scripts/python/flamegraph.py | |
| parent | 7df53c4d3364de240c94591aadb20737ddc970ea (diff) | |
serial: 8250_mxpcie: support serial interface mode switching
Moxa PCIe multiport serial boards support switching the serial interface
mode between RS232, RS422, RS485-2W, and RS485-4W via on-board control
registers.
Implement an rs485_config() callback and map TIOCSRS485 requests to the
corresponding hardware modes using serial_rs485 flags:
- RS232 = (no flags set)
- RS422 = SER_RS485_ENABLED | SER_RS485_MODE_RS422
- RS485_2W (half-duplex) = SER_RS485_ENABLED
- RS485_4W (full-duplex) = SER_RS485_ENABLED | SER_RS485_RX_DURING_TX
This allows users to reconfigure the serial mode at runtime via ioctl().
Signed-off-by: Crescent Hsieh <crescentcy.hsieh@moxa.com>
Link: https://patch.msgid.link/20260731074820.735619-10-crescentcy.hsieh@moxa.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/perf/scripts/python/flamegraph.py')
0 files changed, 0 insertions, 0 deletions