From 08386bf7bcca6d14dca9b32349cd9a733fb94194 Mon Sep 17 00:00:00 2001 From: Giulio Benetti Date: Thu, 26 Mar 2020 00:14:22 +0100 Subject: [PATCH v3 5/5] serial: 8250_dw: add em485 support 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 [moved to use newly added start/stop helpers] Signed-off-by: Heiko Stuebner --- drivers/tty/serial/8250/8250_dw.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c index 51a7d3b19b39..36d364268a45 100644 --- a/drivers/tty/serial/8250/8250_dw.c +++ b/drivers/tty/serial/8250/8250_dw.c @@ -415,6 +415,9 @@ 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) -- 2.25.1