diff options
| author | Lino Sanfilippo <l.sanfilippo@kunbus.com> | 2024-01-03 09:18:13 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-02-01 03:18:47 +0300 |
| commit | 9744575e6955f96e6068ce76e7c86410513aa414 (patch) | |
| tree | 3071b472f33d0daa538497fb38fb37a7fa4a46f1 /drivers/tty | |
| parent | 28c85cd0a671fdb453688075f33d24eee6b30afe (diff) | |
| download | linux-9744575e6955f96e6068ce76e7c86410513aa414.tar.xz | |
serial: core: set missing supported flag for RX during TX GPIO
[ Upstream commit 1a33e33ca0e80d485458410f149265cdc0178cfa ]
If the RS485 feature RX-during-TX is supported by means of a GPIO set the
according supported flag. Otherwise setting this feature from userspace may
not be possible, since in uart_sanitize_serial_rs485() the passed RS485
configuration is matched against the supported features and unsupported
settings are thereby removed and thus take no effect.
Cc: <stable@vger.kernel.org>
Fixes: 163f080eb717 ("serial: core: Add option to output RS485 RX_DURING_TX state via GPIO")
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Lino Sanfilippo <l.sanfilippo@kunbus.com>
Link: https://lore.kernel.org/r/20240103061818.564-3-l.sanfilippo@kunbus.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/serial_core.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index 021e096bc4ed..bde5b6015305 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -3630,6 +3630,8 @@ int uart_get_rs485_mode(struct uart_port *port) if (IS_ERR(desc)) return dev_err_probe(dev, PTR_ERR(desc), "Cannot get rs485-rx-during-tx-gpios\n"); port->rs485_rx_during_tx_gpio = desc; + if (port->rs485_rx_during_tx_gpio) + port->rs485_supported.flags |= SER_RS485_RX_DURING_TX; return 0; } |