diff --git a/drivers/tty/serial/st-asc.c b/drivers/tty/serial/st-asc.c
index 387bc69bb1fe..b8954f0bba8f 100644
--- a/drivers/tty/serial/st-asc.c
+++ b/drivers/tty/serial/st-asc.c
@@ -691,8 +691,7 @@ static int asc_init_port(struct asc_port *ascport,
 	port->irq	= platform_get_irq(pdev, 0);
 	port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_ST_ASC_CONSOLE);
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	port->membase = devm_ioremap_resource(&pdev->dev, res);
+	port->membase = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
 	if (IS_ERR(port->membase))
 		return PTR_ERR(port->membase);
 	port->mapbase = res->start;