serial: 8250_dwlib: Implement SW half duplex support
This patch enables support for SW half-duplex mode using em485. Cc: Eric Tremblay <etremblay@distech-controls.com> Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Tested-by:Vicente Bergas <vicencb@gmail.com> Signed-off-by:
Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Link: https://lore.kernel.org/r/20220426122448.38997-3-ilpo.jarvinen@linux.intel.com Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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