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Diffstat (limited to 'drivers/iommu/exynos-iommu.c')
-rw-r--r--drivers/iommu/exynos-iommu.c44
1 files changed, 11 insertions, 33 deletions
diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
index 2395478dde75..f596fcc32898 100644
--- a/drivers/iommu/exynos-iommu.c
+++ b/drivers/iommu/exynos-iommu.c
@@ -54,10 +54,6 @@ typedef u32 sysmmu_pte_t;
#define lv2ent_small(pent) ((*(pent) & 2) == 2)
#define lv2ent_large(pent) ((*(pent) & 3) == 1)
-#ifdef CONFIG_BIG_ENDIAN
-#warning "revisit driver if we can enable big-endian ptes"
-#endif
-
/*
* v1.x - v3.x SYSMMU supports 32bit physical and 32bit virtual address spaces
* v5.0 introduced support for 36bit physical address space by shifting
@@ -569,7 +565,7 @@ static void sysmmu_tlb_invalidate_entry(struct sysmmu_drvdata *data,
spin_unlock_irqrestore(&data->lock, flags);
}
-static struct iommu_ops exynos_iommu_ops;
+static const struct iommu_ops exynos_iommu_ops;
static int __init exynos_sysmmu_probe(struct platform_device *pdev)
{
@@ -659,6 +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;
@@ -1323,7 +1326,7 @@ static int exynos_iommu_of_xlate(struct device *dev,
return 0;
}
-static struct iommu_ops exynos_iommu_ops = {
+static const struct iommu_ops exynos_iommu_ops = {
.domain_alloc = exynos_iommu_domain_alloc,
.domain_free = exynos_iommu_domain_free,
.attach_dev = exynos_iommu_attach_device,
@@ -1339,8 +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;
@@ -1373,8 +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);
@@ -1384,27 +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);