diff --git a/drivers/serial/Kconfig.miv b/drivers/serial/Kconfig.miv
index 255a6fee6e7..e785c67b1be 100644
--- a/drivers/serial/Kconfig.miv
+++ b/drivers/serial/Kconfig.miv
@@ -7,5 +7,6 @@ config UART_MIV
 	bool "Mi-V serial driver"
 	depends on SOC_RISCV32_MIV
 	select SERIAL_HAS_DRIVER
+	select SERIAL_SUPPORT_INTERRUPT
 	help
 	  This option enables the Mi-V serial driver.
diff --git a/drivers/serial/uart_miv.c b/drivers/serial/uart_miv.c
index 315760b11f4..628351b4a19 100644
--- a/drivers/serial/uart_miv.c
+++ b/drivers/serial/uart_miv.c
@@ -295,9 +295,8 @@ static int uart_miv_irq_update(const struct device *dev)
 	return 1;
 }
 
-static void uart_miv_irq_handler(void *arg)
+static void uart_miv_irq_handler(const struct device *dev)
 {
-	const struct device *dev = (const struct device *)arg;
 	struct uart_miv_data *data = DEV_DATA(dev);
 
 	if (data->callback) {
@@ -329,7 +328,7 @@ void uart_miv_rx_thread(void *arg1, void *arg2, void *arg3)
 		if (uart->status & STATUS_RXFULL_MASK) {
 			uart_miv_irq_handler(dev);
 		}
-		k_sleep(delay);
+		k_sleep(K_USEC(delay));
 	}
 }