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-rw-r--r--drivers/tty/serial/8250/8250_mtk.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/tty/serial/8250/8250_mtk.c b/drivers/tty/serial/8250/8250_mtk.c
index f839380c2f4c..98b8a3e30733 100644
--- a/drivers/tty/serial/8250/8250_mtk.c
+++ b/drivers/tty/serial/8250/8250_mtk.c
@@ -306,8 +306,21 @@ mtk8250_set_termios(struct uart_port *port, struct ktermios *termios,
}
#endif
+ /*
+ * Store the requested baud rate before calling the generic 8250
+ * set_termios method. Standard 8250 port expects bauds to be
+ * no higher than (uartclk / 16) so the baud will be clamped if it
+ * gets out of that bound. Mediatek 8250 port supports speed
+ * higher than that, therefore we'll get original baud rate back
+ * after calling the generic set_termios method and recalculate
+ * the speed later in this method.
+ */
+ baud = tty_termios_baud_rate(termios);
+
serial8250_do_set_termios(port, termios, old);
+ tty_termios_encode_baud_rate(termios, baud, baud);
+
/*
* Mediatek UARTs use an extra highspeed register (MTK_UART_HIGHS)
*
@@ -339,6 +352,11 @@ mtk8250_set_termios(struct uart_port *port, struct ktermios *termios,
*/
spin_lock_irqsave(&port->lock, flags);
+ /*
+ * Update the per-port timeout.
+ */
+ uart_update_timeout(port, termios->c_cflag, baud);
+
/* set DLAB we have cval saved in up->lcr from the call to the core */
serial_port_out(port, UART_LCR, up->lcr | UART_LCR_DLAB);
serial_dl_write(up, quot);