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| author | Lino Sanfilippo <l.sanfilippo@kunbus.com> | 2024-01-03 07:18:13 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-01-04 16:26:09 +0100 |
| commit | 1a33e33ca0e80d485458410f149265cdc0178cfa (patch) | |
| tree | be2f09a9bd335365b30995a969f1bae6c8f0f7b7 /drivers/tty/serial/serial_core.c | |
| parent | 07c30ea5861fb26a77dade8cdc787252f6122fb1 (diff) | |
| download | linux-stable-1a33e33ca0e80d485458410f149265cdc0178cfa.tar.gz linux-stable-1a33e33ca0e80d485458410f149265cdc0178cfa.tar.bz2 linux-stable-1a33e33ca0e80d485458410f149265cdc0178cfa.zip | |
serial: core: set missing supported flag for RX during TX GPIO
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>
Diffstat (limited to 'drivers/tty/serial/serial_core.c')
| -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 8d381c283cec..850f24cc53e5 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -3649,6 +3649,8 @@ 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; } |