[PATCH 2/4] serial: 8250: export serial8250_get_baud_rate()

[Christian Marangi <ansuelsmth@gmail.com>]

Some driver might need to access the current baud rate to correctly
configure it.

Export the serial8250_get_baud_rate() function to limit code duplication.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
---
 drivers/tty/serial/8250/8250_port.c | 7 ++++---
 include/linux/serial_8250.h         | 4 ++++
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
index 630deb7dd344..033d8fb8bb23 100644
--- a/drivers/tty/serial/8250/8250_port.c
+++ b/drivers/tty/serial/8250/8250_port.c
@@ -2560,9 +2560,9 @@ static void serial8250_set_divisor(struct uart_port *port, unsigned int baud,
 		serial8250_do_set_divisor(port, baud, quot);
 }
 
-static unsigned int serial8250_get_baud_rate(struct uart_port *port,
-					     struct ktermios *termios,
-					     const struct ktermios *old)
+unsigned int serial8250_get_baud_rate(struct uart_port *port,
+				      struct ktermios *termios,
+				      const struct ktermios *old)
 {
 	unsigned int tolerance = port->uartclk / 100;
 	unsigned int min;
@@ -2589,6 +2589,7 @@ static unsigned int serial8250_get_baud_rate(struct uart_port *port,
 	 */
 	return uart_get_baud_rate(port, termios, old, min, max);
 }
+EXPORT_SYMBOL_GPL(serial8250_get_baud_rate);
 
 /*
  * Note in order to avoid the tty port mutex deadlock don't use the next method
diff --git a/include/linux/serial_8250.h b/include/linux/serial_8250.h
index a95b2d143d24..8d26fa2008b6 100644
--- a/include/linux/serial_8250.h
+++ b/include/linux/serial_8250.h
@@ -208,6 +208,10 @@ void serial8250_console_write(struct uart_8250_port *up, const char *s,
 int serial8250_console_setup(struct uart_port *port, char *options, bool probe);
 int serial8250_console_exit(struct uart_port *port);
 
+unsigned int serial8250_get_baud_rate(struct uart_port *port,
+				      struct ktermios *termios,
+				      const struct ktermios *old);
+
 void serial8250_set_isa_configurator(void (*v)(int port, struct uart_port *up,
 					       u32 *capabilities));
 
-- 
2.53.0