@@ -676,9 +676,6 @@ int serial8250_em485_config(struct uart_port *port, struct ktermios *termios,
rs485->flags &= ~SER_RS485_RTS_AFTER_SEND;
}
- gpiod_set_value(port->rs485_term_gpio,
- rs485->flags & SER_RS485_TERMINATE_BUS);
-
/*
* Both serial8250_em485_init() and serial8250_em485_destroy()
* are idempotent.
@@ -1358,12 +1358,23 @@ static void uart_sanitize_serial_rs485(struct uart_port *port, struct serial_rs4
memset(rs485->padding1, 0, sizeof(rs485->padding1));
}
+static void uart_set_rs485_termination(struct uart_port *port,
+ const struct serial_rs485 *rs485)
+{
+ if (!(rs485->flags & SER_RS485_ENABLED))
+ return;
+
+ gpiod_set_value_cansleep(port->rs485_term_gpio,
+ !!(rs485->flags & SER_RS485_TERMINATE_BUS));
+}
+
int uart_rs485_config(struct uart_port *port)
{
struct serial_rs485 *rs485 = &port->rs485;
int ret;
uart_sanitize_serial_rs485(port, rs485);
+ uart_set_rs485_termination(port, rs485);
ret = port->rs485_config(port, NULL, rs485);
if (ret)
@@ -1406,6 +1417,7 @@ static int uart_set_rs485_config(struct tty_struct *tty, struct uart_port *port,
if (ret)
return ret;
uart_sanitize_serial_rs485(port, &rs485);
+ uart_set_rs485_termination(port, &rs485);
spin_lock_irqsave(&port->lock, flags);
ret = port->rs485_config(port, &tty->termios, &rs485);