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, 43 insertions, 0 deletions

diff --git a/kernel/arch/arm/mach-imx/cpu-imx35.c b/kernel/arch/arm/mach-imx/cpu-imx35.c
new file mode 100644
index 000000000..ec3aaa098
--- /dev/null
+++ b/kernel/arch/arm/mach-imx/cpu-imx35.c
@@ -0,0 +1,43 @@
+/*
+ * MX35 CPU type detection
+ *
+ * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+#include <linux/module.h>
+#include <linux/io.h>
+
+#include "hardware.h"
+#include "iim.h"
+
+static int mx35_cpu_rev = -1;
+
+static int mx35_read_cpu_rev(void)
+{
+	u32 rev;
+
+	rev = __raw_readl(MX35_IO_ADDRESS(MX35_IIM_BASE_ADDR + MXC_IIMSREV));
+	switch (rev) {
+	case 0x00:
+		return IMX_CHIP_REVISION_1_0;
+	case 0x10:
+		return IMX_CHIP_REVISION_2_0;
+	case 0x11:
+		return IMX_CHIP_REVISION_2_1;
+	default:
+		return IMX_CHIP_REVISION_UNKNOWN;
+	}
+}
+
+int mx35_revision(void)
+{
+	if (mx35_cpu_rev == -1)
+		mx35_cpu_rev = mx35_read_cpu_rev();
+
+	return mx35_cpu_rev;
+}
+EXPORT_SYMBOL(mx35_revision);