diff --git a/drivers/pci/controller/dwc/pcie-rcar-gen4.c b/drivers/pci/controller/dwc/pcie-rcar-gen4.c
index 21c3dd9b8891..b8237962de18 100644
--- a/drivers/pci/controller/dwc/pcie-rcar-gen4.c
+++ b/drivers/pci/controller/dwc/pcie-rcar-gen4.c
@@ -671,6 +671,8 @@ static int rcar_gen4_add_dw_pcie_rp(struct rcar_gen4_pcie *rcar)
 		return -ENODEV;
 
 	pp->num_vectors = MAX_MSI_IRQS;
+	/* Reserve an iATU window for the generic PME_Turn_Off implementation. */
+	pp->use_atu_msg = true;
 	pp->ops = &rcar_gen4_pcie_host_ops;
 
 	return dw_pcie_host_init(pp);
@@ -1062,6 +1064,26 @@ static int rcar_gen4_pcie_ltssm_control(struct rcar_gen4_pcie *rcar, bool enable
 	return 0;
 }
 
+static int rcar_gen4_pcie_suspend_noirq(struct device *dev)
+{
+	struct rcar_gen4_pcie *rcar = dev_get_drvdata(dev);
+
+	if (rcar->drvdata->mode != DW_PCIE_RC_TYPE)
+		return 0;
+
+	return dw_pcie_suspend_noirq(&rcar->dw);
+}
+
+static int rcar_gen4_pcie_resume_noirq(struct device *dev)
+{
+	struct rcar_gen4_pcie *rcar = dev_get_drvdata(dev);
+
+	if (rcar->drvdata->mode != DW_PCIE_RC_TYPE)
+		return 0;
+
+	return dw_pcie_resume_noirq(&rcar->dw);
+}
+
 static struct rcar_gen4_pcie_drvdata drvdata_r8a779f0_pcie = {
 	.init = rcar_gen4_pcie_common_init,
 	.deinit = rcar_gen4_pcie_common_deinit,
@@ -1127,10 +1149,15 @@ static const struct of_device_id rcar_gen4_pcie_of_match[] = {
 };
 MODULE_DEVICE_TABLE(of, rcar_gen4_pcie_of_match);
 
+static DEFINE_NOIRQ_DEV_PM_OPS(rcar_gen4_pcie_pm_ops,
+			       rcar_gen4_pcie_suspend_noirq,
+			       rcar_gen4_pcie_resume_noirq);
+
 static struct platform_driver rcar_gen4_pcie_driver = {
 	.driver = {
 		.name = "pcie-rcar-gen4",
 		.of_match_table = rcar_gen4_pcie_of_match,
+		.pm = pm_sleep_ptr(&rcar_gen4_pcie_pm_ops),
 		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
 	},
 	.probe = rcar_gen4_pcie_probe,