diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
index 79f67fd863ec..d8b9d2b8c200 100644
--- a/drivers/serial/8250.c
+++ b/drivers/serial/8250.c
@@ -1682,22 +1682,22 @@ serial8250_set_termios(struct uart_port *port, struct termios *termios,
 
 	switch (termios->c_cflag & CSIZE) {
 	case CS5:
-		cval = 0x00;
+		cval = UART_LCR_WLEN5;
 		break;
 	case CS6:
-		cval = 0x01;
+		cval = UART_LCR_WLEN6;
 		break;
 	case CS7:
-		cval = 0x02;
+		cval = UART_LCR_WLEN7;
 		break;
 	default:
 	case CS8:
-		cval = 0x03;
+		cval = UART_LCR_WLEN8;
 		break;
 	}
 
 	if (termios->c_cflag & CSTOPB)
-		cval |= 0x04;
+		cval |= UART_LCR_STOP;
 	if (termios->c_cflag & PARENB)
 		cval |= UART_LCR_PARITY;
 	if (!(termios->c_cflag & PARODD))
diff --git a/drivers/serial/au1x00_uart.c b/drivers/serial/au1x00_uart.c
index b6d3d5034940..5400dc2c087e 100644
--- a/drivers/serial/au1x00_uart.c
+++ b/drivers/serial/au1x00_uart.c
@@ -773,22 +773,22 @@ serial8250_set_termios(struct uart_port *port, struct termios *termios,
 
 	switch (termios->c_cflag & CSIZE) {
 	case CS5:
-		cval = 0x00;
+		cval = UART_LCR_WLEN5;
 		break;
 	case CS6:
-		cval = 0x01;
+		cval = UART_LCR_WLEN6;
 		break;
 	case CS7:
-		cval = 0x02;
+		cval = UART_LCR_WLEN7;
 		break;
 	default:
 	case CS8:
-		cval = 0x03;
+		cval = UART_LCR_WLEN8;
 		break;
 	}
 
 	if (termios->c_cflag & CSTOPB)
-		cval |= 0x04;
+		cval |= UART_LCR_STOP;
 	if (termios->c_cflag & PARENB)
 		cval |= UART_LCR_PARITY;
 	if (!(termios->c_cflag & PARODD))
diff --git a/drivers/serial/m32r_sio.c b/drivers/serial/m32r_sio.c
index 08d61f13edc6..0301feacbde4 100644
--- a/drivers/serial/m32r_sio.c
+++ b/drivers/serial/m32r_sio.c
@@ -724,22 +724,22 @@ static void m32r_sio_set_termios(struct uart_port *port,
 
 	switch (termios->c_cflag & CSIZE) {
 	case CS5:
-		cval = 0x00;
+		cval = UART_LCR_WLEN5;
 		break;
 	case CS6:
-		cval = 0x01;
+		cval = UART_LCR_WLEN6;
 		break;
 	case CS7:
-		cval = 0x02;
+		cval = UART_LCR_WLEN7;
 		break;
 	default:
 	case CS8:
-		cval = 0x03;
+		cval = UART_LCR_WLEN8;
 		break;
 	}
 
 	if (termios->c_cflag & CSTOPB)
-		cval |= 0x04;
+		cval |= UART_LCR_STOP;
 	if (termios->c_cflag & PARENB)
 		cval |= UART_LCR_PARITY;
 	if (!(termios->c_cflag & PARODD))
diff --git a/drivers/serial/pxa.c b/drivers/serial/pxa.c
index 9dc151d8fa61..08b08d6ae904 100644
--- a/drivers/serial/pxa.c
+++ b/drivers/serial/pxa.c
@@ -455,22 +455,22 @@ serial_pxa_set_termios(struct uart_port *port, struct termios *termios,
 
 	switch (termios->c_cflag & CSIZE) {
 	case CS5:
-		cval = 0x00;
+		cval = UART_LCR_WLEN5;
 		break;
 	case CS6:
-		cval = 0x01;
+		cval = UART_LCR_WLEN6;
 		break;
 	case CS7:
-		cval = 0x02;
+		cval = UART_LCR_WLEN7;
 		break;
 	default:
 	case CS8:
-		cval = 0x03;
+		cval = UART_LCR_WLEN8;
 		break;
 	}
 
 	if (termios->c_cflag & CSTOPB)
-		cval |= 0x04;
+		cval |= UART_LCR_STOP;
 	if (termios->c_cflag & PARENB)
 		cval |= UART_LCR_PARITY;
 	if (!(termios->c_cflag & PARODD))