3 files changed, 40 insertions, 7 deletions
diff --git a/drivers/tty/serial/8250/8250.c b/drivers/tty/serial/8250/8250.c
index 3ba4234592b..5ccbd90540c 100644
--- a/drivers/tty/serial/8250/8250.c
+++ b/drivers/tty/serial/8250/8250.c
@@ -2349,16 +2349,14 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios,
 			serial_port_out(port, UART_EFR, efr);
 	}
 
-#ifdef CONFIG_ARCH_OMAP1
 	/* Workaround to enable 115200 baud on OMAP1510 internal ports */
-	if (cpu_is_omap1510() && is_omap_port(up)) {
+	if (is_omap1510_8250(up)) {
 		if (baud == 115200) {
 			quot = 1;
 			serial_port_out(port, UART_OMAP_OSC_12M_SEL, 1);
 		} else
 			serial_port_out(port, UART_OMAP_OSC_12M_SEL, 0);
 	}
-#endif
 
 	/*
 	 * For NatSemi, switch to bank 2 not bank 1, to avoid resetting EXCR2,
@@ -2439,10 +2437,9 @@ static unsigned int serial8250_port_size(struct uart_8250_port *pt)
 {
 	if (pt->port.iotype == UPIO_AU)
 		return 0x1000;
-#ifdef CONFIG_ARCH_OMAP1
-	if (is_omap_port(pt))
+	if (is_omap1_8250(pt))
 		return 0x16 << pt->port.regshift;
-#endif
+
 	return 8 << pt->port.regshift;
 }
 
diff --git a/drivers/tty/serial/8250/8250.h b/drivers/tty/serial/8250/8250.h
index 5a76f9c8d36..3b4ea84898c 100644
--- a/drivers/tty/serial/8250/8250.h
+++ b/drivers/tty/serial/8250/8250.h
@@ -106,3 +106,39 @@ static inline int serial8250_pnp_init(void) { return 0; }
 static inline void serial8250_pnp_exit(void) { }
 #endif
 
+#ifdef CONFIG_ARCH_OMAP1
+static inline int is_omap1_8250(struct uart_8250_port *pt)
+{
+	int res;
+
+	switch (pt->port.mapbase) {
+	case OMAP1_UART1_BASE:
+	case OMAP1_UART2_BASE:
+	case OMAP1_UART3_BASE:
+		res = 1;
+		break;
+	default:
+		res = 0;
+		break;
+	}
+
+	return res;
+}
+
+static inline int is_omap1510_8250(struct uart_8250_port *pt)
+{
+	if (!cpu_is_omap1510())
+		return 0;
+
+	return is_omap1_8250(pt);
+}
+#else
+static inline int is_omap1_8250(struct uart_8250_port *pt)
+{
+	return 0;
+}
+static inline int is_omap1510_8250(struct uart_8250_port *pt)
+{
+	return 0;
+}
+#endif
diff --git a/drivers/tty/serial/8250/8250_early.c b/drivers/tty/serial/8250/8250_early.c
index eaafb98debe..843a150ba10 100644
--- a/drivers/tty/serial/8250/8250_early.c
+++ b/drivers/tty/serial/8250/8250_early.c
@@ -140,7 +140,7 @@ static void __init init_port(struct early_serial8250_device *device)
 	serial_out(port, UART_FCR, 0);		/* no fifo */
 	serial_out(port, UART_MCR, 0x3);	/* DTR + RTS */
 
-	divisor = port->uartclk / (16 * device->baud);
+	divisor = DIV_ROUND_CLOSEST(port->uartclk, 16 * device->baud);
 	c = serial_in(port, UART_LCR);
 	serial_out(port, UART_LCR, c | UART_LCR_DLAB);
 	serial_out(port, UART_DLL, divisor & 0xff);