linux-kernel - [PATCH 2/2] serial: RS485 termination is supported if DT provides one

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Date:   Mon,  4 Jul 2022 12:45:15 +0300
From:   Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To:     linux-serial@...r.kernel.org, Greg KH <gregkh@...uxfoundation.org>,
        Jiri Slaby <jirislaby@...nel.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Lukas Wunner <lukas@...ner.de>,
        Lino Sanfilippo <LinoSanfilippo@....de>,
        linux-kernel@...r.kernel.org
Cc:     Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Subject: [PATCH 2/2] serial: RS485 termination is supported if DT provides one

When DT provides rs485-term, set termination flag as supported.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
---
 drivers/tty/serial/serial_core.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index a9cf1044a9fa..1db44cde76f6 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -3409,6 +3409,8 @@ int uart_get_rs485_mode(struct uart_port *port)
 		port->rs485_term_gpio = NULL;
 		return dev_err_probe(dev, ret, "Cannot get rs485-term-gpios\n");
 	}
+	if (port->rs485_term_gpio)
+		port->rs485_supported.flags |= SER_RS485_TERMINATE_BUS;
 
 	return 0;
 }
-- 
2.30.2