@@ -13,16 +13,21 @@
#endif
#include <linux/clk.h>
+#include <linux/dma-mapping.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/iommu.h>
#include <linux/interrupt.h>
#include <linux/list.h>
+#include <linux/of.h>
+#include <linux/of_iommu.h>
+#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include <asm/cacheflush.h>
+#include <asm/dma-iommu.h>
#include <asm/pgtable.h>
typedef u32 sysmmu_iova_t;
@@ -1083,6 +1088,8 @@ static const struct iommu_ops exynos_iommu_ops = {
.pgsize_bitmap = SECT_SIZE | LPAGE_SIZE | SPAGE_SIZE,
};
+static int init_done;
+
static int __init exynos_iommu_init(void)
{
int ret;
@@ -1115,6 +1122,8 @@ 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);
@@ -1124,4 +1133,25 @@ err_reg_driver:
kmem_cache_destroy(lv2table_kmem_cache);
return ret;
}
-subsys_initcall(exynos_iommu_init);
+
+static struct iommu_data exynos_of_data = {
+ .ops = &exynos_iommu_ops,
+};
+
+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 (IS_ERR(pdev))
+ return PTR_ERR(pdev);
+
+ of_iommu_set_data(np, &exynos_of_data);
+ return 0;
+}
+
+IOMMU_OF_DECLARE(exynos_iommu_of, "samsung,exynos-sysmmu",
+ exynos_iommu_of_setup);
This patch introduces IOMMU_OF_DECLARE-based initialization to the driver, which replaces subsys_initcall-based procedure. exynos_iommu_of_setup ensures that each sysmmu controller is probed before its master device. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> --- drivers/iommu/exynos-iommu.c | 32 +++++++++++++++++++++++++++++++- 1 file changed, 31 insertions(+), 1 deletion(-)