diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c
index 7f23ad61c094f..204a93a725724 100644
--- a/drivers/iommu/rockchip-iommu.c
+++ b/drivers/iommu/rockchip-iommu.c
@@ -1407,9 +1407,4 @@ static struct platform_driver rk_iommu_driver = {
 		   .suppress_bind_attrs = true,
 	},
 };
-
-static int __init rk_iommu_init(void)
-{
-	return platform_driver_register(&rk_iommu_driver);
-}
-subsys_initcall(rk_iommu_init);
+builtin_platform_driver(rk_iommu_driver);