[PATCH 6/9] serial: sc16is7xx: add support for rs485 RTS delays in microseconds
From: Martin Kepplinger <hidden>
Date: 2019-02-20 15:31:40
Also in:
linux-devicetree, linux-serial, lkml
Subsystem:
the rest, tty layer and serial drivers · Maintainers:
Linus Torvalds, Greg Kroah-Hartman, Jiri Slaby
Read struct serial_rs485's flag SER_RS485_DELAY_IN_USEC and apply the delay accordingly. Signed-off-by: Martin Kepplinger <redacted> --- drivers/tty/serial/sc16is7xx.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c
index 635178cf3eed..b0e00b9fb177 100644
--- a/drivers/tty/serial/sc16is7xx.c
+++ b/drivers/tty/serial/sc16is7xx.c@@ -743,7 +743,13 @@ static void sc16is7xx_tx_proc(struct kthread_work *ws) struct uart_port *port = &(to_sc16is7xx_one(ws, tx_work)->port); if ((port->rs485.flags & SER_RS485_ENABLED) && - (port->rs485.delay_rts_before_send > 0)) + (port->rs485.delay_rts_before_send > 0) && + (port->rs485.flags & SER_RS485_DELAY_IN_USEC)) + usleep_range(port->rs485.delay_rts_before_send, + port->rs485.delay_rts_before_send); + else if ((port->rs485.flags & SER_RS485_ENABLED) && + (port->rs485.delay_rts_before_send > 0) && + !(port->rs485.flags & SER_RS485_DELAY_IN_USEC)) msleep(port->rs485.delay_rts_before_send); sc16is7xx_handle_tx(port);
--
2.20.1