@@ -349,7 +349,7 @@ config S390_AP_IOMMU
is not implemented as it is not necessary for VFIO.
config MTK_IOMMU
- bool "MTK IOMMU Support"
+ tristate "MediaTek IOMMU Support"
depends on ARCH_MEDIATEK || COMPILE_TEST
select ARM_DMA_USE_IOMMU
select IOMMU_API
@@ -17,6 +17,7 @@
#include <linux/iopoll.h>
#include <linux/list.h>
#include <linux/mfd/syscon.h>
+#include <linux/module.h>
#include <linux/of_address.h>
#include <linux/of_iommu.h>
#include <linux/of_irq.h>
@@ -683,6 +684,7 @@ static const struct iommu_ops mtk_iommu_ops = {
.get_resv_regions = mtk_iommu_get_resv_regions,
.put_resv_regions = generic_iommu_put_resv_regions,
.pgsize_bitmap = SZ_4K | SZ_64K | SZ_1M | SZ_16M,
+ .owner = THIS_MODULE,
};
static int mtk_iommu_hw_init(const struct mtk_iommu_data *data)
@@ -1079,16 +1081,7 @@ static struct platform_driver mtk_iommu_driver = {
.pm = &mtk_iommu_pm_ops,
}
};
+module_platform_driver(mtk_iommu_driver);
-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)
+MODULE_DESCRIPTION("IOMMU API for MediaTek M4U implementations");
+MODULE_LICENSE("GPL v2");
The IOMMU in many SoC depends on the MM clocks and power-domain which are device_initcall normally, thus the subsys_init here is not helpful. This patch switches it to module_platform_driver which also allow the driver built as module. Correspondingly switch the config to tristate, and update the iommu_ops's owner. Signed-off-by: Yong Wu <yong.wu@mediatek.com> --- drivers/iommu/Kconfig | 2 +- drivers/iommu/mtk_iommu.c | 17 +++++------------ 2 files changed, 6 insertions(+), 13 deletions(-)