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iommu/exynos: Remove custom platform device registration code 

Commit 09515ef5dd ("of/acpi: Configure dma operations at probe time for
platform/amba/pci bus devices") postponed the moment of attaching IOMMU
controller to its device, so there is no need to register IOMMU controllers
very early, before all other devices in the system. This change gives us an
opportunity to use standard platform device registration method also for
Exynos SYSMMU controllers.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Marek Szyprowski 2017-08-04 12:28:33 +02:00 committed by Joerg Roedel
parent db3a7fd7a9
commit 928055a01b
1 changed files with 9 additions and 27 deletions
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36
drivers/iommu/exynos-iommu.c
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@ -655,6 +655,13 @@ static int __init exynos_sysmmu_probe(struct platform_device *pdev)
}
}
/*
* use the first registered sysmmu device for performing
* dma mapping operations on iommu page tables (cpu cache flush)
*/
if (!dma_dev)
dma_dev = &pdev->dev;
pm_runtime_enable(dev);
return 0;
@ -1335,8 +1342,6 @@ static struct iommu_ops exynos_iommu_ops = {
.of_xlate = exynos_iommu_of_xlate,
};
static bool init_done;
static int __init exynos_iommu_init(void)
{
int ret;
@ -1369,8 +1374,6 @@ static int __init exynos_iommu_init(void)
goto err_set_iommu;
}
init_done = true;
return 0;
err_set_iommu:
kmem_cache_free(lv2table_kmem_cache, zero_lv2_table);
@ -1380,27 +1383,6 @@ err_reg_driver:
kmem_cache_destroy(lv2table_kmem_cache);
return ret;
}
core_initcall(exynos_iommu_init);
static int __init exynos_iommu_of_setup(struct device_node *np)
{
struct platform_device *pdev;
if (!init_done)
exynos_iommu_init();
pdev = of_platform_device_create(np, NULL, platform_bus_type.dev_root);
if (!pdev)
return -ENODEV;
/*
* use the first registered sysmmu device for performing
* dma mapping operations on iommu page tables (cpu cache flush)
*/
if (!dma_dev)
dma_dev = &pdev->dev;
return 0;
}
IOMMU_OF_DECLARE(exynos_iommu_of, "samsung,exynos-sysmmu",
exynos_iommu_of_setup);
IOMMU_OF_DECLARE(exynos_iommu_of, "samsung,exynos-sysmmu", NULL);