serial: 8250_lpss: Extract dw8250_do_set_termios() for common use

Some of the code currently used in dw8250_set_termios(), byt_set_termios() may be reused by other methods in the future. Extract it to a common helper function. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://lore.kernel.org/r/20211005133026.21488-1-andriy.shevchenko@linux.intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
WalkerChenL · Oct 10, 2021 · 7c4fc08 · 7c4fc08
1 parent 0eb9da9
commit 7c4fc08
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Showing 4 changed files with 13 additions and 10 deletions.
diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c
@@ -350,11 +350,7 @@ static void dw8250_set_termios(struct uart_port *p, struct ktermios *termios,
 	}
 	clk_prepare_enable(d->clk);
 
-	p->status &= ~UPSTAT_AUTOCTS;
-	if (termios->c_cflag & CRTSCTS)
-		p->status |= UPSTAT_AUTOCTS;
-
-	serial8250_do_set_termios(p, termios, old);
+	dw8250_do_set_termios(p, termios, old);
 }
 
 static void dw8250_set_ldisc(struct uart_port *p, struct ktermios *termios)

diff --git a/drivers/tty/serial/8250/8250_dwlib.c b/drivers/tty/serial/8250/8250_dwlib.c
@@ -77,6 +77,16 @@ static void dw8250_set_divisor(struct uart_port *p, unsigned int baud,
 	serial8250_do_set_divisor(p, baud, quot, quot_frac);
 }
 
+void dw8250_do_set_termios(struct uart_port *p, struct ktermios *termios, struct ktermios *old)
+{
+	p->status &= ~UPSTAT_AUTOCTS;
+	if (termios->c_cflag & CRTSCTS)
+		p->status |= UPSTAT_AUTOCTS;
+
+	serial8250_do_set_termios(p, termios, old);
+}
+EXPORT_SYMBOL_GPL(dw8250_do_set_termios);
+
 void dw8250_setup_port(struct uart_port *p)
 {
 	struct uart_8250_port *up = up_to_u8250p(p);

diff --git a/drivers/tty/serial/8250/8250_dwlib.h b/drivers/tty/serial/8250/8250_dwlib.h
@@ -16,4 +16,5 @@ struct dw8250_port_data {
 	u8			dlf_size;
 };
 
+void dw8250_do_set_termios(struct uart_port *p, struct ktermios *termios, struct ktermios *old);
 void dw8250_setup_port(struct uart_port *p);
diff --git a/drivers/tty/serial/8250/8250_lpss.c b/drivers/tty/serial/8250/8250_lpss.c
@@ -100,11 +100,7 @@ static void byt_set_termios(struct uart_port *p, struct ktermios *termios,
 	reg |= BYT_PRV_CLK_EN | BYT_PRV_CLK_UPDATE;
 	writel(reg, p->membase + BYT_PRV_CLK);
 
-	p->status &= ~UPSTAT_AUTOCTS;
-	if (termios->c_cflag & CRTSCTS)
-		p->status |= UPSTAT_AUTOCTS;
-
-	serial8250_do_set_termios(p, termios, old);
+	dw8250_do_set_termios(p, termios, old);
 }
 
 static unsigned int byt_get_mctrl(struct uart_port *port)