[PATCH v3 10/14] iommu/mediatek: Use builtin_platform_driver

[Yong Wu]

MediaTek IOMMU should wait for smi larb which need wait for the
power domain(mtk-scpsys.c) and the multimedia ccf who both are
module init. Thus, subsys_initcall for MediaTek IOMMU is not helpful.
Switch to builtin_platform_driver.

Signed-off-by: Yong Wu <yong.wu@xxxxxxxxxxxx>
---
 drivers/iommu/mtk_iommu.c    | 31 +------------------------------
 drivers/iommu/mtk_iommu_v1.c | 24 +-----------------------
 2 files changed, 2 insertions(+), 53 deletions(-)

diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index 2511b3c..109c3f2 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -735,22 +735,6 @@ static int mtk_iommu_probe(struct platform_device *pdev)
 	return component_master_add_with_match(dev, &mtk_iommu_com_ops, match);
 }
 
-static int mtk_iommu_remove(struct platform_device *pdev)
-{
-	struct mtk_iommu_data *data = platform_get_drvdata(pdev);
-
-	iommu_device_sysfs_remove(&data->iommu);
-	iommu_device_unregister(&data->iommu);
-
-	if (iommu_present(&platform_bus_type))
-		bus_set_iommu(&platform_bus_type, NULL);
-
-	clk_disable_unprepare(data->bclk);
-	devm_free_irq(&pdev->dev, data->irq, data);
-	component_master_del(&pdev->dev, &mtk_iommu_com_ops);
-	return 0;
-}
-
 static int __maybe_unused mtk_iommu_suspend(struct device *dev)
 {
 	struct mtk_iommu_data *data = dev_get_drvdata(dev);
@@ -831,23 +815,10 @@ static int __maybe_unused mtk_iommu_resume(struct device *dev)
 
 static struct platform_driver mtk_iommu_driver = {
 	.probe	= mtk_iommu_probe,
-	.remove	= mtk_iommu_remove,
 	.driver	= {
 		.name = "mtk-iommu",
 		.of_match_table = of_match_ptr(mtk_iommu_of_ids),
 		.pm = &mtk_iommu_pm_ops,
 	}
 };
-
-static int __init mtk_iommu_init(void)
-{
-	int ret;
-
-	ret = platform_driver_register(&mtk_iommu_driver);
-	if (ret != 0)
-		pr_err("Failed to register MTK IOMMU driver\n");
-
-	return ret;
-}
-
-subsys_initcall(mtk_iommu_init)
+builtin_platform_driver(mtk_iommu_driver);
diff --git a/drivers/iommu/mtk_iommu_v1.c b/drivers/iommu/mtk_iommu_v1.c
index a7f22a2..821d483 100644
--- a/drivers/iommu/mtk_iommu_v1.c
+++ b/drivers/iommu/mtk_iommu_v1.c
@@ -660,22 +660,6 @@ static int mtk_iommu_probe(struct platform_device *pdev)
 	return component_master_add_with_match(dev, &mtk_iommu_com_ops, match);
 }
 
-static int mtk_iommu_remove(struct platform_device *pdev)
-{
-	struct mtk_iommu_data *data = platform_get_drvdata(pdev);
-
-	iommu_device_sysfs_remove(&data->iommu);
-	iommu_device_unregister(&data->iommu);
-
-	if (iommu_present(&platform_bus_type))
-		bus_set_iommu(&platform_bus_type, NULL);
-
-	clk_disable_unprepare(data->bclk);
-	devm_free_irq(&pdev->dev, data->irq, data);
-	component_master_del(&pdev->dev, &mtk_iommu_com_ops);
-	return 0;
-}
-
 static int __maybe_unused mtk_iommu_suspend(struct device *dev)
 {
 	struct mtk_iommu_data *data = dev_get_drvdata(dev);
@@ -712,16 +696,10 @@ static int __maybe_unused mtk_iommu_resume(struct device *dev)
 
 static struct platform_driver mtk_iommu_driver = {
 	.probe	= mtk_iommu_probe,
-	.remove	= mtk_iommu_remove,
 	.driver	= {
 		.name = "mtk-iommu-v1",
 		.of_match_table = mtk_iommu_of_ids,
 		.pm = &mtk_iommu_pm_ops,
 	}
 };
-
-static int __init m4u_init(void)
-{
-	return platform_driver_register(&mtk_iommu_driver);
-}
-subsys_initcall(m4u_init);
+builtin_platform_driver(mtk_iommu_driver);
-- 
1.9.1