diff mbox series

[v4,2/7] serial: core: set missing supported flag for RX during TX GPIO

Message ID 20231018174840.28977-3-l.sanfilippo@kunbus.com
State New
Headers show
Series Fixes and improvements for RS485 | expand

Commit Message

Lino Sanfilippo Oct. 18, 2023, 5:48 p.m. UTC 
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")
Signed-off-by: Lino Sanfilippo <l.sanfilippo@kunbus.com>
---
 drivers/tty/serial/serial_core.c | 2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 35e014f83465..ef9e9014bfab 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -3632,6 +3632,8 @@  int uart_get_rs485_mode(struct uart_port *port)
 		port->rs485_rx_during_tx_gpio = NULL;
 		return dev_err_probe(dev, ret, "Cannot get rs485-rx-during-tx-gpios\n");
 	}
+	if (port->rs485_rx_during_tx_gpio)
+		port->rs485_supported.flags |= SER_RS485_RX_DURING_TX;
 
 	return 0;
 }