[v2,7/7] serial: 8250_dw: add em485 support

Message ID 20200325231422.1502366-8-heiko@sntech.de
State New
Headers show
Series
  • serial: 8250: Add rs485 emulation to 8250_dw
Related show

Commit Message

Heiko Stübner March 25, 2020, 11:14 p.m.
From: Giulio Benetti <giulio.benetti@micronovasrl.com>

Need to use rs485 transceiver so let's use existing em485 485 emulation
layer on top of 8250.

Add rs485_config callback to port and uses the standard em485 start and
stop helpers.

Signed-off-by: Giulio Benetti <giulio.benetti@micronovasrl.com>
[moved to use newly added start/stop helpers]
Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
---
 drivers/tty/serial/8250/8250_dw.c | 3 +++
 1 file changed, 3 insertions(+)

Patch

diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c
index aab3cccc6789..588319075b36 100644
--- a/drivers/tty/serial/8250/8250_dw.c
+++ b/drivers/tty/serial/8250/8250_dw.c
@@ -414,6 +414,9 @@  static int dw8250_probe(struct platform_device *pdev)
 	p->serial_out	= dw8250_serial_out;
 	p->set_ldisc	= dw8250_set_ldisc;
 	p->set_termios	= dw8250_set_termios;
+	p->rs485_config = serial8250_em485_config;
+	up->rs485_start_tx = serial8250_em485_start_tx;
+	up->rs485_stop_tx = serial8250_em485_stop_tx;
 
 	p->membase = devm_ioremap(dev, regs->start, resource_size(regs));
 	if (!p->membase)