From: Janghyuck Kim <janghyuck.kim@samsung.com>
Date: Thu, 21 Apr 2016 10:19:53 +0000 (+0900)
Subject: [COMMON] iommu/exynos: add initialization
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=d20adc2e942b56ed0793147be8f63e1f27d1a8bb;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

[COMMON] iommu/exynos: add initialization

This is the starting point for exynos iommu driver.
It registers sysmmu driver and iommu api to platform_bus_type.

Change-Id: Iae165ce448ab4334ca956c5c2aaaa6bbe4997d7a
Signed-off-by: Janghyuck Kim <janghyuck.kim@samsung.com>
---

diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
index 1d5e93032757..6552a37a3a9e 100644
--- a/drivers/iommu/exynos-iommu.c
+++ b/drivers/iommu/exynos-iommu.c
@@ -27,6 +27,8 @@
 
 #include "exynos-iommu.h"
 
+static struct kmem_cache *lv2table_kmem_cache;
+
 static int __init exynos_sysmmu_probe(struct platform_device *pdev)
 {
 	/* Dummy */
@@ -122,4 +124,37 @@ static struct iommu_ops exynos_iommu_ops = {
 	.of_xlate = exynos_iommu_of_xlate,
 };
 
+static int __init exynos_iommu_init(void)
+{
+	int ret;
+
+	lv2table_kmem_cache = kmem_cache_create("exynos-iommu-lv2table",
+				LV2TABLE_SIZE, LV2TABLE_SIZE, 0, NULL);
+	if (!lv2table_kmem_cache) {
+		pr_err("%s: Failed to create kmem cache\n", __func__);
+		return -ENOMEM;
+	}
+
+	ret = platform_driver_register(&exynos_sysmmu_driver);
+	if (ret) {
+		pr_err("%s: Failed to register driver\n", __func__);
+		goto err_reg_driver;
+	}
+
+	ret = bus_set_iommu(&platform_bus_type, &exynos_iommu_ops);
+	if (ret) {
+		pr_err("%s: Failed to register exynos-iommu driver.\n",
+								__func__);
+		goto err_set_iommu;
+	}
+
+	return 0;
+err_set_iommu:
+	platform_driver_unregister(&exynos_sysmmu_driver);
+err_reg_driver:
+	kmem_cache_destroy(lv2table_kmem_cache);
+	return ret;
+}
+core_initcall(exynos_iommu_init);
+
 IOMMU_OF_DECLARE(exynos_iommu_of, "samsung,exynos-sysmmu", NULL);