Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 77 insertions, 0 deletions

diff --git a/kernel/arch/arm/mach-omap2/omap-iommu.c b/kernel/arch/arm/mach-omap2/omap-iommu.c
new file mode 100644
index 000000000..4068350f9
--- /dev/null
+++ b/kernel/arch/arm/mach-omap2/omap-iommu.c
@@ -0,0 +1,77 @@
+/*
+ * omap iommu: omap device registration
+ *
+ * Copyright (C) 2008-2009 Nokia Corporation
+ *
+ * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/of.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+
+#include <linux/platform_data/iommu-omap.h>
+#include "soc.h"
+#include "omap_hwmod.h"
+#include "omap_device.h"
+
+static int __init omap_iommu_dev_init(struct omap_hwmod *oh, void *unused)
+{
+	struct platform_device *pdev;
+	struct iommu_platform_data *pdata;
+	struct omap_mmu_dev_attr *a = (struct omap_mmu_dev_attr *)oh->dev_attr;
+	static int i;
+
+	pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
+	if (!pdata)
+		return -ENOMEM;
+
+	pdata->name = oh->name;
+	pdata->nr_tlb_entries = a->nr_tlb_entries;
+
+	if (oh->rst_lines_cnt == 1) {
+		pdata->reset_name = oh->rst_lines->name;
+		pdata->assert_reset = omap_device_assert_hardreset;
+		pdata->deassert_reset = omap_device_deassert_hardreset;
+	}
+
+	pdev = omap_device_build("omap-iommu", i, oh, pdata, sizeof(*pdata));
+
+	kfree(pdata);
+
+	if (IS_ERR(pdev)) {
+		pr_err("%s: device build err: %ld\n", __func__, PTR_ERR(pdev));
+		return PTR_ERR(pdev);
+	}
+
+	i++;
+
+	return 0;
+}
+
+static int __init omap_iommu_init(void)
+{
+	/* If dtb is there, the devices will be created dynamically */
+	if (of_have_populated_dt())
+		return -ENODEV;
+
+	return omap_hwmod_for_each_by_class("mmu", omap_iommu_dev_init, NULL);
+}
+/* must be ready before omap3isp is probed */
+omap_subsys_initcall(omap_iommu_init);
+
+static void __exit omap_iommu_exit(void)
+{
+	/* Do nothing */
+}
+module_exit(omap_iommu_exit);
+
+MODULE_AUTHOR("Hiroshi DOYU");
+MODULE_DESCRIPTION("omap iommu: omap device registration");
+MODULE_LICENSE("GPL v2");