diff --git a/drivers/tty/serial/clps711x.c b/drivers/tty/serial/clps711x.c
index 98f193a83392..061590795680 100644
--- a/drivers/tty/serial/clps711x.c
+++ b/drivers/tty/serial/clps711x.c
@@ -442,14 +442,10 @@ static struct console clps711x_console = {
 static int uart_clps711x_probe(struct platform_device *pdev)
 {
 	struct device_node *np = pdev->dev.of_node;
-	int ret, index = np ? of_alias_get_id(np, "serial") : pdev->id;
 	struct clps711x_port *s;
 	struct resource *res;
 	struct clk *uart_clk;
-	int irq;
-
-	if (index < 0 || index >= UART_CLPS711X_NR)
-		return -EINVAL;
+	int irq, ret;
 
 	s = devm_kzalloc(&pdev->dev, sizeof(*s), GFP_KERNEL);
 	if (!s)
@@ -473,20 +469,11 @@ static int uart_clps711x_probe(struct platform_device *pdev)
 	if (s->rx_irq < 0)
 		return s->rx_irq;
 
-	if (!np) {
-		char syscon_name[9];
+	s->syscon = syscon_regmap_lookup_by_phandle(np, "syscon");
+	if (IS_ERR(s->syscon))
+		return PTR_ERR(s->syscon);
 
-		sprintf(syscon_name, "syscon.%i", index + 1);
-		s->syscon = syscon_regmap_lookup_by_pdevname(syscon_name);
-		if (IS_ERR(s->syscon))
-			return PTR_ERR(s->syscon);
-	} else {
-		s->syscon = syscon_regmap_lookup_by_phandle(np, "syscon");
-		if (IS_ERR(s->syscon))
-			return PTR_ERR(s->syscon);
-	}
-
-	s->port.line		= index;
+	s->port.line		= of_alias_get_id(np, "serial");
 	s->port.dev		= &pdev->dev;
 	s->port.iotype		= UPIO_MEM32;
 	s->port.mapbase		= res->start;