diff --git a/drivers/pci/pci-rcar-gen4.c b/drivers/pci/pci-rcar-gen4.c
index 6e093829861..1f41ce28b0b 100644
--- a/drivers/pci/pci-rcar-gen4.c
+++ b/drivers/pci/pci-rcar-gen4.c
@@ -306,6 +306,8 @@ static int rcar_gen4_pcie_common_init(struct rcar_gen4_pcie *rcar)
 	if (ret)
 		goto err_unprepare;
 
+	mdelay(1);
+
 	setbits_le32(rcar->app_base + PCIEMSR0,
 		     DEVICE_TYPE_RC |
 		     ((rcar->num_lanes < 4) ? BIFUR_MOD_SET_ON : 0));