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| author | Matwey V. Kornilov <matwey@sai.msu.ru> | 2016-02-01 21:09:21 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-02-06 22:23:26 -0800 |
| commit | e490c9144cfaa8e2242c1e5d5187230928f27417 (patch) | |
| tree | 183cac3bb0d61e0637045d9973e628bd98d9009f /ipc/msg.c | |
| parent | a07a70bcb72e4a766c8d3173986a773cef842d30 (diff) | |
tty: Add software emulated RS485 support for 8250
Implementation of software emulation of RS485 direction handling is based
on omap_serial driver.
Before and after transmission RTS is set to the appropriate value.
Note that before calling serial8250_em485_init() the caller has to
ensure that UART will interrupt when shift register empty. Otherwise,
emultaion cannot be used.
Both serial8250_em485_init() and serial8250_em485_destroy() are
idempotent functions.
Signed-off-by: Matwey V. Kornilov <matwey@sai.msu.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'ipc/msg.c')
0 files changed, 0 insertions, 0 deletions