diff --git a/drivers/mailbox/imx-mailbox.c b/drivers/mailbox/imx-mailbox.c
index 7906624a731c..97bf0acf51d8 100644
--- a/drivers/mailbox/imx-mailbox.c
+++ b/drivers/mailbox/imx-mailbox.c
@@ -12,6 +12,7 @@
 #include <linux/mailbox_controller.h>
 #include <linux/module.h>
 #include <linux/of_device.h>
+#include <linux/pm_runtime.h>
 #include <linux/slab.h>
 
 #define IMX_MU_xSR_GIPn(x)	BIT(28 + (3 - (x)))
@@ -287,6 +288,7 @@ static int imx_mu_startup(struct mbox_chan *chan)
 	struct imx_mu_con_priv *cp = chan->con_priv;
 	int ret;
 
+	pm_runtime_get_sync(priv->dev);
 	if (cp->type == IMX_MU_TYPE_TXDB) {
 		/* Tx doorbell don't have ACK support */
 		tasklet_init(&cp->txdb_tasklet, imx_mu_txdb_tasklet,
@@ -323,6 +325,7 @@ static void imx_mu_shutdown(struct mbox_chan *chan)
 
 	if (cp->type == IMX_MU_TYPE_TXDB) {
 		tasklet_kill(&cp->txdb_tasklet);
+		pm_runtime_put_sync(priv->dev);
 		return;
 	}
 
@@ -341,6 +344,7 @@ static void imx_mu_shutdown(struct mbox_chan *chan)
 	}
 
 	free_irq(priv->irq, chan);
+	pm_runtime_put_sync(priv->dev);
 }
 
 static const struct mbox_chan_ops imx_mu_ops = {
@@ -508,7 +512,27 @@ static int imx_mu_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, priv);
 
-	return devm_mbox_controller_register(dev, &priv->mbox);
+	ret = devm_mbox_controller_register(dev, &priv->mbox);
+	if (ret)
+		return ret;
+
+	pm_runtime_enable(dev);
+
+	ret = pm_runtime_get_sync(dev);
+	if (ret < 0) {
+		pm_runtime_put_noidle(dev);
+		goto disable_runtime_pm;
+	}
+
+	ret = pm_runtime_put_sync(dev);
+	if (ret < 0)
+		goto disable_runtime_pm;
+
+	return 0;
+
+disable_runtime_pm:
+	pm_runtime_disable(dev);
+	return ret;
 }
 
 static int imx_mu_remove(struct platform_device *pdev)
@@ -516,6 +540,7 @@ static int imx_mu_remove(struct platform_device *pdev)
 	struct imx_mu_priv *priv = platform_get_drvdata(pdev);
 
 	clk_disable_unprepare(priv->clk);
+	pm_runtime_disable(priv->dev);
 
 	return 0;
 }