serial: 8250_dw: add em485 support
From: Giulio Benetti <giulio.benetti@...> Date: Wed, 6 Jun 2018 11:51:54 +0200
Commit-Message
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@...> [moved to use newly added start/stop helpers] Signed-off-by: Heiko Stuebner <heiko.stuebner@...>
Patch-Comment
drivers/tty/serial/8250/8250_dw.c | 3 +++ 1 file changed, 3 insertions(+)
Statistics
- 3 lines added
- 0 lines removed
Changes
---------------------- drivers/tty/serial/8250/8250_dw.c -----------------------
index aab3cccc6789..588319075b36 100644
@@ -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)